diff --git a/windowsAgent/dist/tcl8/8.4/platform-1.0.14.tm b/windowsAgent/dist/tcl8/8.4/platform-1.0.14.tm
new file mode 100644
index 0000000..35a22a3
--- /dev/null
+++ b/windowsAgent/dist/tcl8/8.4/platform-1.0.14.tm
@@ -0,0 +1,397 @@
+# -*- tcl -*-
+# ### ### ### ######### ######### #########
+## Overview
+
+# Heuristics to assemble a platform identifier from publicly available
+# information. The identifier describes the platform of the currently
+# running tcl shell. This is a mixture of the runtime environment and
+# of build-time properties of the executable itself.
+#
+# Examples:
+# <1> A tcl shell executing on a x86_64 processor, but having a
+#   wordsize of 4 was compiled for the x86 environment, i.e. 32
+#   bit, and loaded packages have to match that, and not the
+#   actual cpu.
+#
+# <2> The hp/solaris 32/64 bit builds of the core cannot be
+#   distinguished by looking at tcl_platform. As packages have to
+#   match the 32/64 information we have to look in more places. In
+#   this case we inspect the executable itself (magic numbers,
+#   i.e. fileutil::magic::filetype).
+#
+# The basic information used comes out of the 'os' and 'machine'
+# entries of the 'tcl_platform' array. A number of general and
+# os/machine specific transformation are applied to get a canonical
+# result.
+#
+# General
+# Only the first element of 'os' is used - we don't care whether we
+# are on "Windows NT" or "Windows XP" or whatever.
+#
+# Machine specific
+# % arm*   -> arm
+# % sun4*  -> sparc
+# % intel  -> ix86
+# % i*86*  -> ix86
+# % Power* -> powerpc
+# % x86_64 + wordSize 4 => x86 code
+#
+# OS specific
+# % AIX are always powerpc machines
+# % HP-UX 9000/800 etc means parisc
+# % linux has to take glibc version into account
+# % sunos -> solaris, and keep version number
+#
+# NOTE: A platform like linux glibc 2.3, which can use glibc 2.2 stuff
+# has to provide all possible allowed platform identifiers when
+# searching search. Ditto a solaris 2.8 platform can use solaris 2.6
+# packages. Etc. This is handled by the other procedure, see below.
+
+# ### ### ### ######### ######### #########
+## Requirements
+
+namespace eval ::platform {}
+
+# ### ### ### ######### ######### #########
+## Implementation
+
+# -- platform::generic
+#
+# Assembles an identifier for the generic platform. It leaves out
+# details like kernel version, libc version, etc.
+
+proc ::platform::generic {} {
+    global tcl_platform
+
+    set plat [string tolower [lindex $tcl_platform(os) 0]]
+    set cpu  $tcl_platform(machine)
+
+    switch -glob -- $cpu {
+	sun4* {
+	    set cpu sparc
+	}
+	intel -
+	i*86* {
+	    set cpu ix86
+	}
+	x86_64 {
+	    if {$tcl_platform(wordSize) == 4} {
+		# See Example <1> at the top of this file.
+		set cpu ix86
+	    }
+	}
+	"Power*" {
+	    set cpu powerpc
+	}
+	"arm*" {
+	    set cpu arm
+	}
+	ia64 {
+	    if {$tcl_platform(wordSize) == 4} {
+		append cpu _32
+	    }
+	}
+    }
+
+    switch -glob -- $plat {
+	cygwin* {
+	    set plat cygwin
+	}
+	windows {
+	    if {$tcl_platform(platform) == "unix"} {
+		set plat cygwin
+	    } else {
+		set plat win32
+	    }
+	    if {$cpu eq "amd64"} {
+		# Do not check wordSize, win32-x64 is an IL32P64 platform.
+		set cpu x86_64
+	    }
+	}
+	sunos {
+	    set plat solaris
+	    if {[string match "ix86" $cpu]} {
+		if {$tcl_platform(wordSize) == 8} {
+		    set cpu x86_64
+		}
+	    } elseif {![string match "ia64*" $cpu]} {
+		# sparc
+		if {$tcl_platform(wordSize) == 8} {
+		    append cpu 64
+		}
+	    }
+	}
+	darwin {
+	    set plat macosx
+	    # Correctly identify the cpu when running as a 64bit
+	    # process on a machine with a 32bit kernel
+	    if {$cpu eq "ix86"} {
+		if {$tcl_platform(wordSize) == 8} {
+		    set cpu x86_64
+		}
+	    }
+	}
+	aix {
+	    set cpu powerpc
+	    if {$tcl_platform(wordSize) == 8} {
+		append cpu 64
+	    }
+	}
+	hp-ux {
+	    set plat hpux
+	    if {![string match "ia64*" $cpu]} {
+		set cpu parisc
+		if {$tcl_platform(wordSize) == 8} {
+		    append cpu 64
+		}
+	    }
+	}
+	osf1 {
+	    set plat tru64
+	}
+    }
+
+    return "${plat}-${cpu}"
+}
+
+# -- platform::identify
+#
+# Assembles an identifier for the exact platform, by extending the
+# generic identifier. I.e. it adds in details like kernel version,
+# libc version, etc., if they are relevant for the loading of
+# packages on the platform.
+
+proc ::platform::identify {} {
+    global tcl_platform
+
+    set id [generic]
+    regexp {^([^-]+)-([^-]+)$} $id -> plat cpu
+
+    switch -- $plat {
+	solaris {
+	    regsub {^5} $tcl_platform(osVersion) 2 text
+	    append plat $text
+	    return "${plat}-${cpu}"
+	}
+	macosx {
+	    set major [lindex [split $tcl_platform(osVersion) .] 0]
+	    if {$major > 8} {
+		incr major -4
+		append plat 10.$major
+		return "${plat}-${cpu}"
+	    }
+	}
+	linux {
+	    # Look for the libc*.so and determine its version
+	    # (libc5/6, libc6 further glibc 2.X)
+
+	    set v unknown
+
+	    # Determine in which directory to look. /lib, or /lib64.
+	    # For that we use the tcl_platform(wordSize).
+	    #
+	    # We could use the 'cpu' info, per the equivalence below,
+	    # that however would be restricted to intel. And this may
+	    # be a arm, mips, etc. system. The wordsize is more
+	    # fundamental.
+	    #
+	    # ix86   <=> (wordSize == 4) <=> 32 bit ==> /lib
+	    # x86_64 <=> (wordSize == 8) <=> 64 bit ==> /lib64
+	    #
+	    # Do not look into /lib64 even if present, if the cpu
+	    # doesn't fit.
+
+	    # TODO: Determine the prefixes (i386, x86_64, ...) for
+	    # other cpus.  The path after the generic one is utterly
+	    # specific to intel right now.  Ok, on Ubuntu, possibly
+	    # other Debian systems we may apparently be able to query
+	    # the necessary CPU code. If we can't we simply use the
+	    # hardwired fallback.
+
+	    switch -exact -- $tcl_platform(wordSize) {
+		4 {
+		    lappend bases /lib
+		    if {[catch {
+			exec dpkg-architecture -qDEB_HOST_MULTIARCH
+		    } res]} {
+			lappend bases /lib/i386-linux-gnu
+		    } else {
+			# dpkg-arch returns the full tripled, not just cpu.
+			lappend bases /lib/$res
+		    }
+		}
+		8 {
+		    lappend bases /lib64
+		    if {[catch {
+			exec dpkg-architecture -qDEB_HOST_MULTIARCH
+		    } res]} {
+			lappend bases /lib/x86_64-linux-gnu
+		    } else {
+			# dpkg-arch returns the full tripled, not just cpu.
+			lappend bases /lib/$res
+		    }
+		}
+		default {
+		    return -code error "Bad wordSize $tcl_platform(wordSize), expected 4 or 8"
+		}
+	    }
+
+	    foreach base $bases {
+		if {[LibcVersion $base -> v]} break
+	    }
+
+	    append plat -$v
+	    return "${plat}-${cpu}"
+	}
+    }
+
+    return $id
+}
+
+proc ::platform::LibcVersion {base _->_ vv} {
+    upvar 1 $vv v
+    set libclist [lsort [glob -nocomplain -directory $base libc*]]
+
+    if {![llength $libclist]} { return 0 }
+
+    set libc [lindex $libclist 0]
+
+    # Try executing the library first. This should suceed
+    # for a glibc library, and return the version
+    # information.
+
+    if {![catch {
+	set vdata [lindex [split [exec $libc] \n] 0]
+    }]} {
+	regexp {version ([0-9]+(\.[0-9]+)*)} $vdata -> v
+	foreach {major minor} [split $v .] break
+	set v glibc${major}.${minor}
+	return 1
+    } else {
+	# We had trouble executing the library. We are now
+	# inspecting its name to determine the version
+	# number. This code by Larry McVoy.
+
+	if {[regexp -- {libc-([0-9]+)\.([0-9]+)} $libc -> major minor]} {
+	    set v glibc${major}.${minor}
+	    return 1
+	}
+    }
+    return 0
+}
+
+# -- platform::patterns
+#
+# Given an exact platform identifier, i.e. _not_ the generic
+# identifier it assembles a list of exact platform identifier
+# describing platform which should be compatible with the
+# input.
+#
+# I.e. packages for all platforms in the result list should be
+# loadable on the specified platform.
+
+# << Should we add the generic identifier to the list as well ? In
+#    general it is not compatible I believe. So better not. In many
+#    cases the exact identifier is identical to the generic one
+#    anyway.
+# >>
+
+proc ::platform::patterns {id} {
+    set res [list $id]
+    if {$id eq "tcl"} {return $res}
+
+    switch -glob --  $id {
+	solaris*-* {
+	    if {[regexp {solaris([^-]*)-(.*)} $id -> v cpu]} {
+		if {$v eq ""} {return $id}
+		foreach {major minor} [split $v .] break
+		incr minor -1
+		for {set j $minor} {$j >= 6} {incr j -1} {
+		    lappend res solaris${major}.${j}-${cpu}
+		}
+	    }
+	}
+	linux*-* {
+	    if {[regexp {linux-glibc([^-]*)-(.*)} $id -> v cpu]} {
+		foreach {major minor} [split $v .] break
+		incr minor -1
+		for {set j $minor} {$j >= 0} {incr j -1} {
+		    lappend res linux-glibc${major}.${j}-${cpu}
+		}
+	    }
+	}
+	macosx-powerpc {
+	    lappend res macosx-universal
+	}
+	macosx-x86_64 {
+	    lappend res macosx-i386-x86_64
+	}
+	macosx-ix86 {
+	    lappend res macosx-universal macosx-i386-x86_64
+	}
+	macosx*-*    {
+	    # 10.5+
+	    if {[regexp {macosx([^-]*)-(.*)} $id -> v cpu]} {
+
+		switch -exact -- $cpu {
+		    ix86    {
+			lappend alt i386-x86_64
+			lappend alt universal
+		    }
+		    x86_64  { lappend alt i386-x86_64 }
+		    default { set alt {} }
+		}
+
+		if {$v ne ""} {
+		    foreach {major minor} [split $v .] break
+
+		    # Add 10.5 to 10.minor to patterns.
+		    set res {}
+		    for {set j $minor} {$j >= 5} {incr j -1} {
+			lappend res macosx${major}.${j}-${cpu}
+			foreach a $alt {
+			    lappend res macosx${major}.${j}-$a
+			}
+		    }
+
+		    # Add unversioned patterns for 10.3/10.4 builds.
+		    lappend res macosx-${cpu}
+		    foreach a $alt {
+			lappend res macosx-$a
+		    }
+		} else {
+		    # No version, just do unversioned patterns.
+		    foreach a $alt {
+			lappend res macosx-$a
+		    }
+		}
+	    } else {
+		# no v, no cpu ... nothing
+	    }
+	}
+    }
+    lappend res tcl ; # Pure tcl packages are always compatible.
+    return $res
+}
+
+
+# ### ### ### ######### ######### #########
+## Ready
+
+package provide platform 1.0.14
+
+# ### ### ### ######### ######### #########
+## Demo application
+
+if {[info exists argv0] && ($argv0 eq [info script])} {
+    puts ====================================
+    parray tcl_platform
+    puts ====================================
+    puts Generic\ identification:\ [::platform::generic]
+    puts Exact\ identification:\ \ \ [::platform::identify]
+    puts ====================================
+    puts Search\ patterns:
+    puts *\ [join [::platform::patterns [::platform::identify]] \n*\ ]
+    puts ====================================
+    exit 0
+}
diff --git a/windowsAgent/dist/tcl8/8.4/platform/shell-1.1.4.tm b/windowsAgent/dist/tcl8/8.4/platform/shell-1.1.4.tm
new file mode 100644
index 0000000..6eb9691
--- /dev/null
+++ b/windowsAgent/dist/tcl8/8.4/platform/shell-1.1.4.tm
@@ -0,0 +1,241 @@
+
+# -*- tcl -*-
+# ### ### ### ######### ######### #########
+## Overview
+
+# Higher-level commands which invoke the functionality of this package
+# for an arbitrary tcl shell (tclsh, wish, ...). This is required by a
+# repository as while the tcl shell executing packages uses the same
+# platform in general as a repository application there can be
+# differences in detail (i.e. 32/64 bit builds).
+
+# ### ### ### ######### ######### #########
+## Requirements
+
+package require platform
+namespace eval ::platform::shell {}
+
+# ### ### ### ######### ######### #########
+## Implementation
+
+# -- platform::shell::generic
+
+proc ::platform::shell::generic {shell} {
+    # Argument is the path to a tcl shell.
+
+    CHECK $shell
+    LOCATE base out
+
+    set     code {}
+    # Forget any pre-existing platform package, it might be in
+    # conflict with this one.
+    lappend code {package forget platform}
+    # Inject our platform package
+    lappend code [list source $base]
+    # Query and print the architecture
+    lappend code {puts [platform::generic]}
+    # And done
+    lappend code {exit 0}
+
+    set arch [RUN $shell [join $code \n]]
+
+    if {$out} {file delete -force $base}
+    return $arch
+}
+
+# -- platform::shell::identify
+
+proc ::platform::shell::identify {shell} {
+    # Argument is the path to a tcl shell.
+
+    CHECK $shell
+    LOCATE base out
+
+    set     code {}
+    # Forget any pre-existing platform package, it might be in
+    # conflict with this one.
+    lappend code {package forget platform}
+    # Inject our platform package
+    lappend code [list source $base]
+    # Query and print the architecture
+    lappend code {puts [platform::identify]}
+    # And done
+    lappend code {exit 0}
+
+    set arch [RUN $shell [join $code \n]]
+
+    if {$out} {file delete -force $base}
+    return $arch
+}
+
+# -- platform::shell::platform
+
+proc ::platform::shell::platform {shell} {
+    # Argument is the path to a tcl shell.
+
+    CHECK $shell
+
+    set     code {}
+    lappend code {puts $tcl_platform(platform)}
+    lappend code {exit 0}
+
+    return [RUN $shell [join $code \n]]
+}
+
+# ### ### ### ######### ######### #########
+## Internal helper commands.
+
+proc ::platform::shell::CHECK {shell} {
+    if {![file exists $shell]} {
+	return -code error "Shell \"$shell\" does not exist"
+    }
+    if {![file executable $shell]} {
+	return -code error "Shell \"$shell\" is not executable (permissions)"
+    }
+    return
+}
+
+proc ::platform::shell::LOCATE {bv ov} {
+    upvar 1 $bv base $ov out
+
+    # Locate the platform package for injection into the specified
+    # shell. We are using package management to find it, whereever it
+    # is, instead of using hardwired relative paths. This allows us to
+    # install the two packages as TMs without breaking the code
+    # here. If the found package is wrapped we copy the code somewhere
+    # where the spawned shell will be able to read it.
+
+    # This code is brittle, it needs has to adapt to whatever changes
+    # are made to the TM code, i.e. the provide statement generated by
+    # tm.tcl
+
+    set pl [package ifneeded platform [package require platform]]
+    set base [lindex $pl end]
+
+    set out 0
+    if {[lindex [file system $base]] ne "native"} {
+	set temp [TEMP]
+	file copy -force $base $temp
+	set base $temp
+	set out 1
+    }
+    return
+}
+
+proc ::platform::shell::RUN {shell code} {
+    set     c [TEMP]
+    set    cc [open $c w]
+    puts  $cc $code
+    close $cc
+
+    set e [TEMP]
+
+    set code [catch {
+        exec $shell $c 2> $e
+    } res]
+
+    file delete $c
+
+    if {$code} {
+	append res \n[read [set chan [open $e r]]][close $chan]
+	file delete $e
+	return -code error "Shell \"$shell\" is not executable ($res)"
+    }
+
+    file delete $e
+    return $res
+}
+
+proc ::platform::shell::TEMP {} {
+    set prefix platform
+
+    # This code is copied out of Tcllib's fileutil package.
+    # (TempFile/tempfile)
+
+    set tmpdir [DIR]
+
+    set chars "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+    set nrand_chars 10
+    set maxtries 10
+    set access [list RDWR CREAT EXCL TRUNC]
+    set permission 0600
+    set channel ""
+    set checked_dir_writable 0
+    set mypid [pid]
+    for {set i 0} {$i < $maxtries} {incr i} {
+ 	set newname $prefix
+ 	for {set j 0} {$j < $nrand_chars} {incr j} {
+ 	    append newname [string index $chars \
+		    [expr {int(rand()*62)}]]
+ 	}
+	set newname [file join $tmpdir $newname]
+ 	if {[file exists $newname]} {
+ 	    after 1
+ 	} else {
+ 	    if {[catch {open $newname $access $permission} channel]} {
+ 		if {!$checked_dir_writable} {
+ 		    set dirname [file dirname $newname]
+ 		    if {![file writable $dirname]} {
+ 			return -code error "Directory $dirname is not writable"
+ 		    }
+ 		    set checked_dir_writable 1
+ 		}
+ 	    } else {
+ 		# Success
+		close $channel
+ 		return [file normalize $newname]
+ 	    }
+ 	}
+    }
+    if {$channel ne ""} {
+ 	return -code error "Failed to open a temporary file: $channel"
+    } else {
+ 	return -code error "Failed to find an unused temporary file name"
+    }
+}
+
+proc ::platform::shell::DIR {} {
+    # This code is copied out of Tcllib's fileutil package.
+    # (TempDir/tempdir)
+
+    global tcl_platform env
+
+    set attempdirs [list]
+
+    foreach tmp {TMPDIR TEMP TMP} {
+	if { [info exists env($tmp)] } {
+	    lappend attempdirs $env($tmp)
+	}
+    }
+
+    switch $tcl_platform(platform) {
+	windows {
+	    lappend attempdirs "C:\\TEMP" "C:\\TMP" "\\TEMP" "\\TMP"
+	}
+	macintosh {
+	    set tmpdir $env(TRASH_FOLDER)  ;# a better place?
+	}
+	default {
+	    lappend attempdirs \
+		[file join / tmp] \
+		[file join / var tmp] \
+		[file join / usr tmp]
+	}
+    }
+
+    lappend attempdirs [pwd]
+
+    foreach tmp $attempdirs {
+	if { [file isdirectory $tmp] && [file writable $tmp] } {
+	    return [file normalize $tmp]
+	}
+    }
+
+    # Fail if nothing worked.
+    return -code error "Unable to determine a proper directory for temporary files"
+}
+
+# ### ### ### ######### ######### #########
+## Ready
+
+package provide platform::shell 1.1.4
diff --git a/windowsAgent/dist/tcl8/8.5/msgcat-1.6.1.tm b/windowsAgent/dist/tcl8/8.5/msgcat-1.6.1.tm
new file mode 100644
index 0000000..646bc17
--- /dev/null
+++ b/windowsAgent/dist/tcl8/8.5/msgcat-1.6.1.tm
@@ -0,0 +1,1210 @@
+# msgcat.tcl --
+#
+#	This file defines various procedures which implement a
+#	message catalog facility for Tcl programs.  It should be
+#	loaded with the command "package require msgcat".
+#
+# Copyright (c) 2010-2015 by Harald Oehlmann.
+# Copyright (c) 1998-2000 by Ajuba Solutions.
+# Copyright (c) 1998 by Mark Harrison.
+#
+# See the file "license.terms" for information on usage and redistribution
+# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+
+package require Tcl 8.5-
+# When the version number changes, be sure to update the pkgIndex.tcl file,
+# and the installation directory in the Makefiles.
+package provide msgcat 1.6.1
+
+namespace eval msgcat {
+    namespace export mc mcexists mcload mclocale mcmax mcmset mcpreferences mcset\
+            mcunknown mcflset mcflmset mcloadedlocales mcforgetpackage\
+	    mcpackageconfig mcpackagelocale
+
+    # Records the list of locales to search
+    variable Loclist {}
+
+    # List of currently loaded locales
+    variable LoadedLocales {}
+
+    # Records the locale of the currently sourced message catalogue file
+    variable FileLocale
+
+    # Configuration values per Package (e.g. client namespace).
+    # The dict key is of the form "<option> <namespace>" and the value is the
+    # configuration option. A nonexisting key is an unset option.
+    variable PackageConfig [dict create mcfolder {} loadcmd {} changecmd {}\
+	    unknowncmd {} loadedlocales {} loclist {}]
+
+    # Records the mapping between source strings and translated strings.  The
+    # dict key is of the form "<namespace> <locale> <src>", where locale and
+    # namespace should be themselves dict values and the value is
+    # the translated string.
+    variable Msgs [dict create]
+
+    # Map of language codes used in Windows registry to those of ISO-639
+    if {[info sharedlibextension] eq ".dll"} {
+	variable WinRegToISO639 [dict create  {*}{
+	    01 ar 0401 ar_SA 0801 ar_IQ 0c01 ar_EG 1001 ar_LY 1401 ar_DZ
+		  1801 ar_MA 1c01 ar_TN 2001 ar_OM 2401 ar_YE 2801 ar_SY
+		  2c01 ar_JO 3001 ar_LB 3401 ar_KW 3801 ar_AE 3c01 ar_BH
+		  4001 ar_QA
+	    02 bg 0402 bg_BG
+	    03 ca 0403 ca_ES
+	    04 zh 0404 zh_TW 0804 zh_CN 0c04 zh_HK 1004 zh_SG 1404 zh_MO
+	    05 cs 0405 cs_CZ
+	    06 da 0406 da_DK
+	    07 de 0407 de_DE 0807 de_CH 0c07 de_AT 1007 de_LU 1407 de_LI
+	    08 el 0408 el_GR
+	    09 en 0409 en_US 0809 en_GB 0c09 en_AU 1009 en_CA 1409 en_NZ
+		  1809 en_IE 1c09 en_ZA 2009 en_JM 2409 en_GD 2809 en_BZ
+		  2c09 en_TT 3009 en_ZW 3409 en_PH
+	    0a es 040a es_ES 080a es_MX 0c0a es_ES@modern 100a es_GT 140a es_CR
+		  180a es_PA 1c0a es_DO 200a es_VE 240a es_CO 280a es_PE
+		  2c0a es_AR 300a es_EC 340a es_CL 380a es_UY 3c0a es_PY
+		  400a es_BO 440a es_SV 480a es_HN 4c0a es_NI 500a es_PR
+	    0b fi 040b fi_FI
+	    0c fr 040c fr_FR 080c fr_BE 0c0c fr_CA 100c fr_CH 140c fr_LU
+		  180c fr_MC
+	    0d he 040d he_IL
+	    0e hu 040e hu_HU
+	    0f is 040f is_IS
+	    10 it 0410 it_IT 0810 it_CH
+	    11 ja 0411 ja_JP
+	    12 ko 0412 ko_KR
+	    13 nl 0413 nl_NL 0813 nl_BE
+	    14 no 0414 no_NO 0814 nn_NO
+	    15 pl 0415 pl_PL
+	    16 pt 0416 pt_BR 0816 pt_PT
+	    17 rm 0417 rm_CH
+	    18 ro 0418 ro_RO 0818 ro_MO
+	    19 ru 0819 ru_MO
+	    1a hr 041a hr_HR 081a sr_YU 0c1a sr_YU@cyrillic
+	    1b sk 041b sk_SK
+	    1c sq 041c sq_AL
+	    1d sv 041d sv_SE 081d sv_FI
+	    1e th 041e th_TH
+	    1f tr 041f tr_TR
+	    20 ur 0420 ur_PK 0820 ur_IN
+	    21 id 0421 id_ID
+	    22 uk 0422 uk_UA
+	    23 be 0423 be_BY
+	    24 sl 0424 sl_SI
+	    25 et 0425 et_EE
+	    26 lv 0426 lv_LV
+	    27 lt 0427 lt_LT
+	    28 tg 0428 tg_TJ
+	    29 fa 0429 fa_IR
+	    2a vi 042a vi_VN
+	    2b hy 042b hy_AM
+	    2c az 042c az_AZ@latin 082c az_AZ@cyrillic
+	    2d eu
+	    2e wen 042e wen_DE
+	    2f mk 042f mk_MK
+	    30 bnt 0430 bnt_TZ
+	    31 ts 0431 ts_ZA
+	    32 tn
+	    33 ven 0433 ven_ZA
+	    34 xh 0434 xh_ZA
+	    35 zu 0435 zu_ZA
+	    36 af 0436 af_ZA
+	    37 ka 0437 ka_GE
+	    38 fo 0438 fo_FO
+	    39 hi 0439 hi_IN
+	    3a mt 043a mt_MT
+	    3b se 043b se_NO
+	    043c gd_UK 083c ga_IE
+	    3d yi 043d yi_IL
+	    3e ms 043e ms_MY 083e ms_BN
+	    3f kk 043f kk_KZ
+	    40 ky 0440 ky_KG
+	    41 sw 0441 sw_KE
+	    42 tk 0442 tk_TM
+	    43 uz 0443 uz_UZ@latin 0843 uz_UZ@cyrillic
+	    44 tt 0444 tt_RU
+	    45 bn 0445 bn_IN
+	    46 pa 0446 pa_IN
+	    47 gu 0447 gu_IN
+	    48 or 0448 or_IN
+	    49 ta
+	    4a te 044a te_IN
+	    4b kn 044b kn_IN
+	    4c ml 044c ml_IN
+	    4d as 044d as_IN
+	    4e mr 044e mr_IN
+	    4f sa 044f sa_IN
+	    50 mn
+	    51 bo 0451 bo_CN
+	    52 cy 0452 cy_GB
+	    53 km 0453 km_KH
+	    54 lo 0454 lo_LA
+	    55 my 0455 my_MM
+	    56 gl 0456 gl_ES
+	    57 kok 0457 kok_IN
+	    58 mni 0458 mni_IN
+	    59 sd
+	    5a syr 045a syr_TR
+	    5b si 045b si_LK
+	    5c chr 045c chr_US
+	    5d iu 045d iu_CA
+	    5e am 045e am_ET
+	    5f ber 045f ber_MA
+	    60 ks 0460 ks_PK 0860 ks_IN
+	    61 ne 0461 ne_NP 0861 ne_IN
+	    62 fy 0462 fy_NL
+	    63 ps
+	    64 tl 0464 tl_PH
+	    65 div 0465 div_MV
+	    66 bin 0466 bin_NG
+	    67 ful 0467 ful_NG
+	    68 ha 0468 ha_NG
+	    69 nic 0469 nic_NG
+	    6a yo 046a yo_NG
+	    70 ibo 0470 ibo_NG
+	    71 kau 0471 kau_NG
+	    72 om 0472 om_ET
+	    73 ti 0473 ti_ET
+	    74 gn 0474 gn_PY
+	    75 cpe 0475 cpe_US
+	    76 la 0476 la_VA
+	    77 so 0477 so_SO
+	    78 sit 0478 sit_CN
+	    79 pap 0479 pap_AN
+	}]
+    }
+}
+
+# msgcat::mc --
+#
+#	Find the translation for the given string based on the current
+#	locale setting. Check the local namespace first, then look in each
+#	parent namespace until the source is found.  If additional args are
+#	specified, use the format command to work them into the traslated
+#	string.
+#	If no catalog item is found, mcunknown is called in the caller frame
+#	and its result is returned.
+#
+# Arguments:
+#	src	The string to translate.
+#	args	Args to pass to the format command
+#
+# Results:
+#	Returns the translated string.  Propagates errors thrown by the
+#	format command.
+
+proc msgcat::mc {src args} {
+    # this may be replaced by:
+    # return [mcget -namespace [uplevel 1 [list ::namespace current]] --\
+    #	    $src {*}$args]
+
+    # Check for the src in each namespace starting from the local and
+    # ending in the global.
+
+    variable Msgs
+    variable Loclist
+
+    set ns [uplevel 1 [list ::namespace current]]
+    set loclist [PackagePreferences $ns]
+
+    set nscur $ns
+    while {$nscur != ""} {
+	foreach loc $loclist {
+	    if {[dict exists $Msgs $nscur $loc $src]} {
+		return [DefaultUnknown "" [dict get $Msgs $nscur $loc $src]\
+			{*}$args]
+	    }
+	}
+	set nscur [namespace parent $nscur]
+    }
+    # call package local or default unknown command
+    set args [linsert $args 0 [lindex $loclist 0] $src]
+    switch -exact -- [Invoke unknowncmd $args $ns result 1] {
+	0 { return [uplevel 1 [linsert $args 0 [namespace origin mcunknown]]] }
+	1 { return [DefaultUnknown {*}$args] }
+	default { return $result }
+    }
+}
+
+# msgcat::mcexists --
+#
+#	Check if a catalog item is set or if mc would invoke mcunknown.
+#
+# Arguments:
+#	-exactnamespace		Only check the exact namespace and no
+#				parent namespaces
+#	-exactlocale		Only check the exact locale and not all members
+#				of the preferences list
+#	src			Message catalog key
+#
+# Results:
+#	true if an adequate catalog key was found
+
+proc msgcat::mcexists {args} {
+
+    variable Msgs
+    variable Loclist
+    variable PackageConfig
+
+    set ns [uplevel 1 [list ::namespace current]]
+    set loclist [PackagePreferences $ns]
+
+    while {[llength $args] != 1} {
+	set args [lassign $args option]
+	switch -glob -- $option {
+	    -exactnamespace { set exactnamespace 1 }
+	    -exactlocale { set loclist [lrange $loclist 0 0] }
+	    -* { return -code error "unknown option \"$option\"" }
+	    default {
+		return -code error "wrong # args: should be\
+			\"[lindex [info level 0] 0] ?-exactnamespace?\
+			?-exactlocale? src\""
+	    }
+	}
+    }
+    set src [lindex $args 0]
+
+    while {$ns ne ""} {
+	foreach loc $loclist {
+	    if {[dict exists $Msgs $ns $loc $src]} {
+		return 1
+	    }
+	}
+	if {[info exists exactnamespace]} {return 0}
+	set ns [namespace parent $ns]
+    }
+    return 0
+}
+
+# msgcat::mclocale --
+#
+#	Query or set the current locale.
+#
+# Arguments:
+#	newLocale	(Optional) The new locale string. Locale strings
+#			should be composed of one or more sublocale parts
+#			separated by underscores (e.g. en_US).
+#
+# Results:
+#	Returns the normalized set locale.
+
+proc msgcat::mclocale {args} {
+    variable Loclist
+    variable LoadedLocales
+    set len [llength $args]
+
+    if {$len > 1} {
+	return -code error "wrong # args: should be\
+		\"[lindex [info level 0] 0] ?newLocale?\""
+    }
+
+    if {$len == 1} {
+	set newLocale [string tolower [lindex $args 0]]
+	if {$newLocale ne [file tail $newLocale]} {
+	    return -code error "invalid newLocale value \"$newLocale\":\
+		    could be path to unsafe code."
+	}
+	if {[lindex $Loclist 0] ne $newLocale} {
+	    set Loclist [GetPreferences $newLocale]
+
+	    # locale not loaded jet
+	    LoadAll $Loclist
+	    # Invoke callback
+	    Invoke changecmd $Loclist
+	}
+    }
+    return [lindex $Loclist 0]
+}
+
+# msgcat::GetPreferences --
+#
+#	Get list of locales from a locale.
+#	The first element is always the lowercase locale.
+#	Other elements have one component separated by "_" less.
+#	Multiple "_" are seen as one separator: de__ch_spec de__ch de {}
+#
+# Arguments:
+#	Locale.
+#
+# Results:
+#	Locale list
+
+proc msgcat::GetPreferences {locale} {
+    set locale [string tolower $locale]
+    set loclist [list $locale]
+    while {-1 !=[set pos [string last "_" $locale]]} {
+	set locale [string range $locale 0 $pos-1]
+	if { "_" ne [string index $locale end] } {
+	    lappend loclist $locale
+	}
+    }
+    if {"" ne [lindex $loclist end]} {
+	lappend loclist {}
+    }
+    return $loclist
+}
+
+# msgcat::mcpreferences --
+#
+#	Fetch the list of locales used to look up strings, ordered from
+#	most preferred to least preferred.
+#
+# Arguments:
+#	None.
+#
+# Results:
+#	Returns an ordered list of the locales preferred by the user.
+
+proc msgcat::mcpreferences {} {
+    variable Loclist
+    return $Loclist
+}
+
+# msgcat::mcloadedlocales --
+#
+#	Get or change the list of currently loaded default locales
+#
+#	The following subcommands are available:
+#	loaded
+#	    Get the current list of loaded locales
+#	clear
+#	    Remove all loaded locales not present in mcpreferences.
+#
+# Arguments:
+#	subcommand		One of loaded or clear
+#
+# Results:
+#	Empty string, if not stated differently for the subcommand
+
+proc msgcat::mcloadedlocales {subcommand} {
+    variable Loclist
+    variable LoadedLocales
+    variable Msgs
+    variable PackageConfig
+    switch -exact -- $subcommand {
+	clear {
+	    # Remove all locales not contained in Loclist
+	    # skip any packages with package locale
+	    set LoadedLocales $Loclist
+	    foreach ns [dict keys $Msgs] {
+		if {![dict exists $PackageConfig loclist $ns]} {
+		    foreach locale [dict keys [dict get $Msgs $ns]] {
+			if {$locale ni $Loclist} {
+			    dict unset Msgs $ns $locale
+			}
+		    }
+		}
+	    }
+	}
+	loaded { return $LoadedLocales }
+	default {
+	    return -code error "unknown subcommand \"$subcommand\": must be\
+		    clear, or loaded"
+	}
+    }
+    return
+}
+
+# msgcat::mcpackagelocale --
+#
+#	Get or change the package locale of the calling package.
+#
+#	The following subcommands are available:
+#	set
+#	    Set a package locale.
+#	    This may load message catalog files and may clear message catalog
+#	    items, if the former locale was the default locale.
+#	    Returns the normalized set locale.
+#	    The default locale is taken, if locale is not given.
+#	get
+#	    Get the locale valid for this package.
+#	isset
+#	    Returns true, if a package locale is set
+#	unset
+#	    Unset the package locale and activate the default locale.
+#	    This loads message catalog file which where missing in the package
+#	    locale.
+#	preferences
+#	    Return locale preference list valid for the package.
+#	loaded
+#	    Return loaded locale list valid for the current package.
+#	clear
+#	    If the current package has a package locale, remove all package
+#	    locales not containes in package mcpreferences.
+#	    It is an error to call this without a package locale set.
+#
+#	The subcommands get, preferences and loaded return the corresponding
+#	default data, if no package locale is set.
+#
+# Arguments:
+#	subcommand		see list above
+#	locale			package locale (only set subcommand)
+#
+# Results:
+#	Empty string, if not stated differently for the subcommand
+
+proc msgcat::mcpackagelocale {subcommand {locale ""}} {
+    # todo: implement using an ensemble
+    variable Loclist
+    variable LoadedLocales
+    variable Msgs
+    variable PackageConfig
+    # Check option
+    # check if required item is exactly provided
+    if {[llength [info level 0]] == 2} {
+	# locale not given
+	unset locale
+    } else {
+	# locale given
+	if {$subcommand in
+		{"get" "isset" "unset" "preferences" "loaded" "clear"} } {
+	    return -code error "wrong # args: should be\
+		    \"[lrange [info level 0] 0 1]\""
+	}
+        set locale [string tolower $locale]
+    }
+    set ns [uplevel 1 {::namespace current}]
+
+    switch -exact -- $subcommand {
+	get { return [lindex [PackagePreferences $ns] 0] }
+	preferences { return [PackagePreferences $ns] }
+	loaded { return [PackageLocales $ns] }
+	present { return [expr {$locale in [PackageLocales $ns]} ]}
+	isset { return [dict exists $PackageConfig loclist $ns] }
+	set { # set a package locale or add a package locale
+
+	    # Copy the default locale if no package locale set so far
+	    if {![dict exists $PackageConfig loclist $ns]} {
+		dict set PackageConfig loclist $ns $Loclist
+		dict set PackageConfig loadedlocales $ns $LoadedLocales
+	    }
+
+	    # Check if changed
+	    set loclist [dict get $PackageConfig loclist $ns]
+	    if {! [info exists locale] || $locale eq [lindex $loclist 0] } {
+		return [lindex $loclist 0]
+	    }
+
+	    # Change loclist
+	    set loclist [GetPreferences $locale]
+	    set locale [lindex $loclist 0]
+	    dict set PackageConfig loclist $ns $loclist
+
+	    # load eventual missing locales
+	    set loadedLocales [dict get $PackageConfig loadedlocales $ns]
+	    if {$locale in $loadedLocales} { return $locale }
+	    set loadLocales [ListComplement $loadedLocales $loclist]
+	    dict set PackageConfig loadedlocales $ns\
+		    [concat $loadedLocales $loadLocales]
+	    Load $ns $loadLocales
+	    return $locale
+	}
+	clear { # Remove all locales not contained in Loclist
+	    if {![dict exists $PackageConfig loclist $ns]} {
+		return -code error "clear only when package locale set"
+	    }
+	    set loclist [dict get $PackageConfig loclist $ns]
+	    dict set PackageConfig loadedlocales $ns $loclist
+	    if {[dict exists $Msgs $ns]} {
+		foreach locale [dict keys [dict get $Msgs $ns]] {
+		    if {$locale ni $loclist} {
+			dict unset Msgs $ns $locale
+		    }
+		}
+	    }
+	}
+	unset {	# unset package locale and restore default locales
+
+	    if { ![dict exists $PackageConfig loclist $ns] } { return }
+
+	    # unset package locale
+	    set loadLocales [ListComplement\
+		    [dict get $PackageConfig loadedlocales $ns] $LoadedLocales]
+	    dict unset PackageConfig loadedlocales $ns
+	    dict unset PackageConfig loclist $ns
+
+	    # unset keys not in global loaded locales
+	    if {[dict exists $Msgs $ns]} {
+		foreach locale [dict keys [dict get $Msgs $ns]] {
+		    if {$locale ni $LoadedLocales} {
+			dict unset Msgs $ns $locale
+		    }
+		}
+	    }
+
+	    # Add missing locales
+	    Load $ns $loadLocales
+	}
+	default {
+	    return -code error "unknown subcommand \"$subcommand\": must be\
+		    clear, get, isset, loaded, present, set, or unset"
+	}
+    }
+    return
+}
+
+# msgcat::mcforgetpackage --
+#
+#	Remove any data of the calling package from msgcat
+#
+
+proc msgcat::mcforgetpackage {} {
+    # todo: this may be implemented using an ensemble
+    variable PackageConfig
+    variable Msgs
+    set ns [uplevel 1 {::namespace current}]
+    # Remove MC items
+    dict unset Msgs $ns
+    # Remove config items
+    foreach key [dict keys $PackageConfig] {
+	dict unset PackageConfig $key $ns
+    }
+    return
+}
+
+# msgcat::mcpackageconfig --
+#
+#	Get or modify the per caller namespace (e.g. packages) config options.
+#
+#	Available subcommands are:
+#
+#	    get		get the current value or an error if not set.
+#	    isset	return true, if the option is set
+#	    set		set the value (see also distinct option).
+#			Returns the number of loaded message files.
+#	    unset	Clear option. return "".
+#
+#	Available options are:
+#
+#	mcfolder
+#	    The message catalog folder of the package.
+#	    This is automatically set by mcload.
+#	    If the value is changed using the set subcommand, an evntual
+#	    loadcmd is invoked and all message files of the package locale are
+#	    loaded.
+#
+#	loadcmd
+#	    The command gets executed before a message file would be
+#	    sourced for this module.
+#	    The command is invoked with the expanded locale list to load.
+#	    The command is not invoked if the registering package namespace
+#	    is not present.
+#	    This callback might also be used as an alternative to message
+#	    files.
+#	    If the value is changed using the set subcommand, the callback is
+#	    directly invoked with the current file locale list. No file load is
+#	    executed.
+#
+#	changecmd
+#	    The command is invoked, after an executed locale change.
+#	    Appended argument is expanded mcpreferences.
+#
+#	unknowncmd
+#	    Use a package locale mcunknown procedure instead the global one.
+#	    The appended arguments are identical to mcunknown.
+#	    A default unknown handler is used if set to the empty string.
+#	    This consists in returning the key if no arguments are given.
+#	    With given arguments, format is used to process the arguments.
+#
+# Arguments:
+#	subcommand		Operation on the package
+#	option			The package option to get or set.
+#	?value?			Eventual value for the subcommand
+#
+# Results:
+#	Depends on the subcommand and option and is described there
+
+proc msgcat::mcpackageconfig {subcommand option {value ""}} {
+    variable PackageConfig
+    # get namespace
+    set ns [uplevel 1 {::namespace current}]
+
+    if {$option ni {"mcfolder" "loadcmd" "changecmd" "unknowncmd"}} {
+	return -code error "bad option \"$option\": must be mcfolder, loadcmd,\
+		changecmd, or unknowncmd"
+    }
+
+    # check if value argument is exactly provided
+    if {[llength [info level 0]] == 4 } {
+	# value provided
+	if {$subcommand in {"get" "isset" "unset"}} {
+	    return -code error "wrong # args: should be\
+		    \"[lrange [info level 0] 0 2] value\""
+	}
+    } elseif {$subcommand eq "set"} {
+        return -code error\
+		"wrong # args: should be \"[lrange [info level 0] 0 2]\""
+    }
+
+    # Execute subcommands
+    switch -exact -- $subcommand {
+	get {	# Operation get return current value
+	    if {![dict exists $PackageConfig $option $ns]} {
+		return -code error "package option \"$option\" not set"
+	    }
+	    return [dict get $PackageConfig $option $ns]
+	}
+	isset {	return [dict exists $PackageConfig $option $ns] }
+	unset {	dict unset PackageConfig $option $ns }
+	set {	# Set option
+
+	    if {$option eq "mcfolder"} {
+		set value [file normalize $value]
+	    }
+	    # Check if changed
+	    if { [dict exists $PackageConfig $option $ns]
+		    && $value eq [dict get $PackageConfig $option $ns] } {
+		return 0
+	    }
+
+	    # set new value
+	    dict set PackageConfig $option $ns $value
+
+	    # Reload pending message catalogs
+	    switch -exact -- $option {
+		mcfolder { return [Load $ns [PackageLocales $ns]] }
+		loadcmd { return [Load $ns [PackageLocales $ns] 1] }
+	    }
+	    return 0
+	}
+	default {
+	    return -code error "unknown subcommand \"$subcommand\":\
+		    must be get, isset, set, or unset"
+	}
+    }
+    return
+}
+
+# msgcat::PackagePreferences --
+#
+#	Return eventual present package preferences or the default list if not
+#	present.
+#
+# Arguments:
+#	ns		Package namespace
+#
+# Results:
+#	locale list
+
+proc msgcat::PackagePreferences {ns} {
+    variable PackageConfig
+    if {[dict exists $PackageConfig loclist $ns]} {
+	return [dict get $PackageConfig loclist $ns]
+    }
+    variable Loclist
+    return $Loclist
+}
+
+# msgcat::PackageLocales --
+#
+#	Return eventual present package locales or the default list if not
+#	present.
+#
+# Arguments:
+#	ns		Package namespace
+#
+# Results:
+#	locale list
+
+proc msgcat::PackageLocales {ns} {
+    variable PackageConfig
+    if {[dict exists $PackageConfig loadedlocales $ns]} {
+	return [dict get $PackageConfig loadedlocales $ns]
+    }
+    variable LoadedLocales
+    return $LoadedLocales
+}
+
+# msgcat::ListComplement --
+#
+#	Build the complement of two lists.
+#	Return a list with all elements in list2 but not in list1.
+#	Optionally return the intersection.
+#
+# Arguments:
+#	list1		excluded list
+#	list2		included list
+#	inlistname	If not "", write in this variable the intersection list
+#
+# Results:
+#	list with all elements in list2 but not in list1
+
+proc msgcat::ListComplement {list1 list2 {inlistname ""}} {
+    if {"" ne $inlistname} {
+	upvar 1 $inlistname inlist
+    }
+    set inlist {}
+    set outlist {}
+    foreach item $list2 {
+	if {$item in $list1} {
+	    lappend inlist $item
+	} else {
+	    lappend outlist $item
+	}
+    }
+    return $outlist
+}
+
+# msgcat::mcload --
+#
+#	Attempt to load message catalogs for each locale in the
+#	preference list from the specified directory.
+#
+# Arguments:
+#	langdir		The directory to search.
+#
+# Results:
+#	Returns the number of message catalogs that were loaded.
+
+proc msgcat::mcload {langdir} {
+    return [uplevel 1 [list\
+	    [namespace origin mcpackageconfig] set mcfolder $langdir]]
+}
+
+# msgcat::LoadAll --
+#
+#	Load a list of locales for all packages not having a package locale
+#	list.
+#
+# Arguments:
+#	langdir		The directory to search.
+#
+# Results:
+#	Returns the number of message catalogs that were loaded.
+
+proc msgcat::LoadAll {locales} {
+    variable PackageConfig
+    variable LoadedLocales
+    if {0 == [llength $locales]} { return {} }
+    # filter jet unloaded locales
+    set locales [ListComplement $LoadedLocales $locales]
+    if {0 == [llength $locales]} { return {} }
+    lappend LoadedLocales {*}$locales
+
+    set packages [lsort -unique [concat\
+	    [dict keys [dict get $PackageConfig loadcmd]]\
+	    [dict keys [dict get $PackageConfig mcfolder]]]]
+    foreach ns $packages {
+	if {! [dict exists $PackageConfig loclist $ns] } {
+	    Load $ns $locales
+	}
+    }
+    return $locales
+}
+
+# msgcat::Load --
+#
+#	Invoke message load callback and load message catalog files.
+#
+# Arguments:
+#	ns		Namespace (equal package) to load the message catalog.
+#	locales		List of locales to load.
+#	callbackonly	true if only callback should be invoked
+#
+# Results:
+#	Returns the number of message catalogs that were loaded.
+
+proc msgcat::Load {ns locales {callbackonly 0}} {
+    variable FileLocale
+    variable PackageConfig
+    variable LoadedLocals
+
+    if {0 == [llength $locales]} { return 0 }
+
+    # Invoke callback
+    Invoke loadcmd $locales $ns
+
+    if {$callbackonly || ![dict exists $PackageConfig mcfolder $ns]} {
+	return 0
+    }
+
+    # Invoke file load
+    set langdir [dict get $PackageConfig mcfolder $ns]
+
+    # Save the file locale if we are recursively called
+    if {[info exists FileLocale]} {
+	set nestedFileLocale $FileLocale
+    }
+    set x 0
+    foreach p $locales {
+	if {$p eq {}} {
+	    set p ROOT
+	}
+	set langfile [file join $langdir $p.msg]
+	if {[file exists $langfile]} {
+	    incr x
+	    set FileLocale [string tolower\
+		    [file tail [file rootname $langfile]]]
+	    if {"root" eq $FileLocale} {
+		set FileLocale ""
+	    }
+	    namespace inscope $ns [list ::source -encoding utf-8 $langfile]
+	    unset FileLocale
+	}
+    }
+    if {[info exists nestedFileLocale]} {
+	set FileLocale $nestedFileLocale
+    }
+    return $x
+}
+
+# msgcat::Invoke --
+#
+#	Invoke a set of registered callbacks.
+#	The callback is only invoked, if its registered namespace exists.
+#
+# Arguments:
+#	index		Index into PackageConfig to get callback command
+#	arglist		parameters to the callback invocation
+#	ns		(Optional) package to call.
+#			If not given or empty, check all registered packages.
+#	resultname	Variable to save the callback result of the last called
+#			callback to. May be set to "" to discard the result.
+#	failerror (0)	Fail on error if true. Otherwise call bgerror.
+#
+# Results:
+#	Possible values:
+#	- 0: no valid command registered
+#	- 1: registered command was the empty string
+#	- 2: registered command called, resultname is set
+#	- 3: registered command failed
+#	If multiple commands are called, the maximum of all results is returned.
+
+proc msgcat::Invoke {index arglist {ns ""} {resultname ""} {failerror 0}} {
+    variable PackageConfig
+    variable Config
+    if {"" ne $resultname} {
+	upvar 1 $resultname result
+    }
+    if {"" eq $ns} {
+	set packageList [dict keys [dict get $PackageConfig $index]]
+    } else {
+	set packageList [list $ns]
+    }
+    set ret 0
+    foreach ns $packageList {
+	if {[dict exists $PackageConfig $index $ns] && [namespace exists $ns]} {
+	    set cmd [dict get $PackageConfig $index $ns]
+	    if {"" eq $cmd} {
+		if {$ret == 0} {set ret 1}
+	    } else {
+		if {$failerror} {
+		    set result [namespace inscope $ns $cmd {*}$arglist]
+		    set ret 2
+		} elseif {1 == [catch {
+		    set result [namespace inscope $ns $cmd {*}$arglist]
+		    if {$ret < 2} {set ret 2}
+		} err derr]} {
+		    after idle [concat [::interp bgerror ""]\
+			    [list $err $derr]]
+		    set ret 3
+		}
+	    }
+	}
+    }
+    return $ret
+}
+
+# msgcat::mcset --
+#
+#	Set the translation for a given string in a specified locale.
+#
+# Arguments:
+#	locale		The locale to use.
+#	src		The source string.
+#	dest		(Optional) The translated string.  If omitted,
+#			the source string is used.
+#
+# Results:
+#	Returns the new locale.
+
+proc msgcat::mcset {locale src {dest ""}} {
+    variable Msgs
+    if {[llength [info level 0]] == 3} { ;# dest not specified
+	set dest $src
+    }
+
+    set ns [uplevel 1 [list ::namespace current]]
+
+    set locale [string tolower $locale]
+
+    dict set Msgs $ns $locale $src $dest
+    return $dest
+}
+
+# msgcat::mcflset --
+#
+#	Set the translation for a given string in the current file locale.
+#
+# Arguments:
+#	src		The source string.
+#	dest		(Optional) The translated string.  If omitted,
+#			the source string is used.
+#
+# Results:
+#	Returns the new locale.
+
+proc msgcat::mcflset {src {dest ""}} {
+    variable FileLocale
+    variable Msgs
+
+    if {![info exists FileLocale]} {
+	return -code error "must only be used inside a message catalog loaded\
+		with ::msgcat::mcload"
+    }
+    return [uplevel 1 [list [namespace origin mcset] $FileLocale $src $dest]]
+}
+
+# msgcat::mcmset --
+#
+#	Set the translation for multiple strings in a specified locale.
+#
+# Arguments:
+#	locale		The locale to use.
+#	pairs		One or more src/dest pairs (must be even length)
+#
+# Results:
+#	Returns the number of pairs processed
+
+proc msgcat::mcmset {locale pairs} {
+    variable Msgs
+
+    set length [llength $pairs]
+    if {$length % 2} {
+	return -code error "bad translation list:\
+		should be \"[lindex [info level 0] 0] locale {src dest ...}\""
+    }
+
+    set locale [string tolower $locale]
+    set ns [uplevel 1 [list ::namespace current]]
+
+    foreach {src dest} $pairs {
+	dict set Msgs $ns $locale $src $dest
+    }
+
+    return [expr {$length / 2}]
+}
+
+# msgcat::mcflmset --
+#
+#	Set the translation for multiple strings in the mc file locale.
+#
+# Arguments:
+#	pairs		One or more src/dest pairs (must be even length)
+#
+# Results:
+#	Returns the number of pairs processed
+
+proc msgcat::mcflmset {pairs} {
+    variable FileLocale
+    variable Msgs
+
+    if {![info exists FileLocale]} {
+	return -code error "must only be used inside a message catalog loaded\
+		with ::msgcat::mcload"
+    }
+    return [uplevel 1 [list [namespace origin mcmset] $FileLocale $pairs]]
+}
+
+# msgcat::mcunknown --
+#
+#	This routine is called by msgcat::mc if a translation cannot
+#	be found for a string and no unknowncmd is set for the current
+#	package. This routine is intended to be replaced
+#	by an application specific routine for error reporting
+#	purposes.  The default behavior is to return the source string.
+#	If additional args are specified, the format command will be used
+#	to work them into the traslated string.
+#
+# Arguments:
+#	locale		The current locale.
+#	src		The string to be translated.
+#	args		Args to pass to the format command
+#
+# Results:
+#	Returns the translated value.
+
+proc msgcat::mcunknown {args} {
+    return [uplevel 1 [list [namespace origin DefaultUnknown] {*}$args]]
+}
+
+# msgcat::DefaultUnknown --
+#
+#	This routine is called by msgcat::mc if a translation cannot
+#	be found for a string in the following circumstances:
+#	- Default global handler, if mcunknown is not redefined.
+#	- Per package handler, if the package sets unknowncmd to the empty
+#	  string.
+#	It returna the source string if the argument list is empty.
+#	If additional args are specified, the format command will be used
+#	to work them into the traslated string.
+#
+# Arguments:
+#	locale		(unused) The current locale.
+#	src		The string to be translated.
+#	args		Args to pass to the format command
+#
+# Results:
+#	Returns the translated value.
+
+proc msgcat::DefaultUnknown {locale src args} {
+    if {[llength $args]} {
+	return [format $src {*}$args]
+    } else {
+	return $src
+    }
+}
+
+# msgcat::mcmax --
+#
+#	Calculates the maximum length of the translated strings of the given
+#	list.
+#
+# Arguments:
+#	args	strings to translate.
+#
+# Results:
+#	Returns the length of the longest translated string.
+
+proc msgcat::mcmax {args} {
+    set max 0
+    foreach string $args {
+	set translated [uplevel 1 [list [namespace origin mc] $string]]
+	set len [string length $translated]
+	if {$len>$max} {
+	    set max $len
+	}
+    }
+    return $max
+}
+
+# Convert the locale values stored in environment variables to a form
+# suitable for passing to [mclocale]
+proc msgcat::ConvertLocale {value} {
+    # Assume $value is of form: $language[_$territory][.$codeset][@modifier]
+    # Convert to form: $language[_$territory][_$modifier]
+    #
+    # Comment out expanded RE version -- bugs alleged
+    # regexp -expanded {
+    #	^		# Match all the way to the beginning
+    #	([^_.@]*)	# Match "lanugage"; ends with _, ., or @
+    #	(_([^.@]*))?	# Match (optional) "territory"; starts with _
+    #	([.]([^@]*))?	# Match (optional) "codeset"; starts with .
+    #	(@(.*))?	# Match (optional) "modifier"; starts with @
+    #	$		# Match all the way to the end
+    # } $value -> language _ territory _ codeset _ modifier
+    if {![regexp {^([^_.@]+)(_([^.@]*))?([.]([^@]*))?(@(.*))?$} $value \
+	    -> language _ territory _ codeset _ modifier]} {
+	return -code error "invalid locale '$value': empty language part"
+    }
+    set ret $language
+    if {[string length $territory]} {
+	append ret _$territory
+    }
+    if {[string length $modifier]} {
+	append ret _$modifier
+    }
+    return $ret
+}
+
+# Initialize the default locale
+proc msgcat::Init {} {
+    global env
+
+    #
+    # set default locale, try to get from environment
+    #
+    foreach varName {LC_ALL LC_MESSAGES LANG} {
+	if {[info exists env($varName)] && ("" ne $env($varName))} {
+	    if {![catch {
+		mclocale [ConvertLocale $env($varName)]
+	    }]} {
+		return
+	    }
+	}
+    }
+    #
+    # On Darwin, fallback to current CFLocale identifier if available.
+    #
+    if {[info exists ::tcl::mac::locale] && $::tcl::mac::locale ne ""} {
+	if {![catch {
+	    mclocale [ConvertLocale $::tcl::mac::locale]
+	}]} {
+	    return
+	}
+    }
+    #
+    # The rest of this routine is special processing for Windows or
+    # Cygwin. All other platforms, get out now.
+    #
+    if {([info sharedlibextension] ne ".dll")
+	    || [catch {package require registry}]} {
+	mclocale C
+	return
+    }
+    #
+    # On Windows or Cygwin, try to set locale depending on registry
+    # settings, or fall back on locale of "C".
+    #
+
+    # On Vista and later:
+    # HCU/Control Panel/Desktop : PreferredUILanguages is for language packs,
+    # HCU/Control Pannel/International : localName is the default locale.
+    #
+    # They contain the local string as RFC5646, composed of:
+    # [a-z]{2,3} : language
+    # -[a-z]{4}  : script (optional, translated by table Latn->latin)
+    # -[a-z]{2}|[0-9]{3} : territory (optional, numerical region codes not used)
+    # (-.*)* : variant, extension, private use (optional, not used)
+    # Those are translated to local strings.
+    # Examples: de-CH -> de_ch, sr-Latn-CS -> sr_cs@latin, es-419 -> es
+    #
+    foreach key {{HKEY_CURRENT_USER\Control Panel\Desktop} {HKEY_CURRENT_USER\Control Panel\International}}\
+	    value {PreferredUILanguages localeName} {
+	if {![catch {registry get $key $value} localeName]
+		&& [regexp {^([a-z]{2,3})(?:-([a-z]{4}))?(?:-([a-z]{2}))?(?:-.+)?$}\
+		    [string tolower $localeName] match locale script territory]} {
+	    if {"" ne $territory} {
+		append locale _ $territory
+	    }
+	    set modifierDict [dict create latn latin cyrl cyrillic]
+	    if {[dict exists $modifierDict $script]} {
+		append locale @ [dict get $modifierDict $script]
+	    }
+	    if {![catch {mclocale [ConvertLocale $locale]}]} {
+		return
+	    }
+	}
+    }
+
+    # then check value locale which contains a numerical language ID
+    if {[catch {
+	set locale [registry get $key "locale"]
+    }]} {
+	mclocale C
+	return
+    }
+    #
+    # Keep trying to match against smaller and smaller suffixes
+    # of the registry value, since the latter hexadigits appear
+    # to determine general language and earlier hexadigits determine
+    # more precise information, such as territory.  For example,
+    #     0409 - English - United States
+    #     0809 - English - United Kingdom
+    # Add more translations to the WinRegToISO639 array above.
+    #
+    variable WinRegToISO639
+    set locale [string tolower $locale]
+    while {[string length $locale]} {
+	if {![catch {
+	    mclocale [ConvertLocale [dict get $WinRegToISO639 $locale]]
+	}]} {
+	    return
+	}
+	set locale [string range $locale 1 end]
+    }
+    #
+    # No translation known.  Fall back on "C" locale
+    #
+    mclocale C
+}
+msgcat::Init
diff --git a/windowsAgent/dist/tcl8/8.5/tcltest-2.5.0.tm b/windowsAgent/dist/tcl8/8.5/tcltest-2.5.0.tm
new file mode 100644
index 0000000..d67a900
--- /dev/null
+++ b/windowsAgent/dist/tcl8/8.5/tcltest-2.5.0.tm
@@ -0,0 +1,3441 @@
+# tcltest.tcl --
+#
+#	This file contains support code for the Tcl test suite.  It
+#       defines the tcltest namespace and finds and defines the output
+#       directory, constraints available, output and error channels,
+#	etc. used by Tcl tests.  See the tcltest man page for more
+#	details.
+#
+#       This design was based on the Tcl testing approach designed and
+#       initially implemented by Mary Ann May-Pumphrey of Sun
+#	Microsystems.
+#
+# Copyright (c) 1994-1997 Sun Microsystems, Inc.
+# Copyright (c) 1998-1999 by Scriptics Corporation.
+# Copyright (c) 2000 by Ajuba Solutions
+# Contributions from Don Porter, NIST, 2002.  (not subject to US copyright)
+# All rights reserved.
+
+package require Tcl 8.5-		;# -verbose line uses [info frame]
+namespace eval tcltest {
+
+    # When the version number changes, be sure to update the pkgIndex.tcl file,
+    # and the install directory in the Makefiles.  When the minor version
+    # changes (new feature) be sure to update the man page as well.
+    variable Version 2.5.0
+
+    # Compatibility support for dumb variables defined in tcltest 1
+    # Do not use these.  Call [package provide Tcl] and [info patchlevel]
+    # yourself.  You don't need tcltest to wrap it for you.
+    variable version [package provide Tcl]
+    variable patchLevel [info patchlevel]
+
+##### Export the public tcltest procs; several categories
+    #
+    # Export the main functional commands that do useful things
+    namespace export cleanupTests loadTestedCommands makeDirectory \
+	makeFile removeDirectory removeFile runAllTests test
+
+    # Export configuration commands that control the functional commands
+    namespace export configure customMatch errorChannel interpreter \
+	    outputChannel testConstraint
+
+    # Export commands that are duplication (candidates for deprecation)
+    namespace export bytestring		;# dups [encoding convertfrom identity]
+    namespace export debug		;#	[configure -debug]
+    namespace export errorFile		;#	[configure -errfile]
+    namespace export limitConstraints	;#	[configure -limitconstraints]
+    namespace export loadFile		;#	[configure -loadfile]
+    namespace export loadScript		;#	[configure -load]
+    namespace export match		;#	[configure -match]
+    namespace export matchFiles		;#	[configure -file]
+    namespace export matchDirectories	;#	[configure -relateddir]
+    namespace export normalizeMsg	;#	application of [customMatch]
+    namespace export normalizePath	;#	[file normalize] (8.4)
+    namespace export outputFile		;#	[configure -outfile]
+    namespace export preserveCore	;#	[configure -preservecore]
+    namespace export singleProcess	;#	[configure -singleproc]
+    namespace export skip		;#	[configure -skip]
+    namespace export skipFiles		;#	[configure -notfile]
+    namespace export skipDirectories	;#	[configure -asidefromdir]
+    namespace export temporaryDirectory	;#	[configure -tmpdir]
+    namespace export testsDirectory	;#	[configure -testdir]
+    namespace export verbose		;#	[configure -verbose]
+    namespace export viewFile		;#	binary encoding [read]
+    namespace export workingDirectory	;#	[cd] [pwd]
+
+    # Export deprecated commands for tcltest 1 compatibility
+    namespace export getMatchingFiles mainThread restoreState saveState \
+	    threadReap
+
+    # tcltest::normalizePath --
+    #
+    #     This procedure resolves any symlinks in the path thus creating
+    #     a path without internal redirection. It assumes that the
+    #     incoming path is absolute.
+    #
+    # Arguments
+    #     pathVar - name of variable containing path to modify.
+    #
+    # Results
+    #     The path is modified in place.
+    #
+    # Side Effects:
+    #     None.
+    #
+    proc normalizePath {pathVar} {
+	upvar 1 $pathVar path
+	set oldpwd [pwd]
+	catch {cd $path}
+	set path [pwd]
+	cd $oldpwd
+	return $path
+    }
+
+##### Verification commands used to test values of variables and options
+    #
+    # Verification command that accepts everything
+    proc AcceptAll {value} {
+	return $value
+    }
+
+    # Verification command that accepts valid Tcl lists
+    proc AcceptList { list } {
+	return [lrange $list 0 end]
+    }
+
+    # Verification command that accepts a glob pattern
+    proc AcceptPattern { pattern } {
+	return [AcceptAll $pattern]
+    }
+
+    # Verification command that accepts integers
+    proc AcceptInteger { level } {
+	return [incr level 0]
+    }
+
+    # Verification command that accepts boolean values
+    proc AcceptBoolean { boolean } {
+	return [expr {$boolean && $boolean}]
+    }
+
+    # Verification command that accepts (syntactically) valid Tcl scripts
+    proc AcceptScript { script } {
+	if {![info complete $script]} {
+	    return -code error "invalid Tcl script: $script"
+	}
+	return $script
+    }
+
+    # Verification command that accepts (converts to) absolute pathnames
+    proc AcceptAbsolutePath { path } {
+	return [file join [pwd] $path]
+    }
+
+    # Verification command that accepts existing readable directories
+    proc AcceptReadable { path } {
+	if {![file readable $path]} {
+	    return -code error "\"$path\" is not readable"
+	}
+	return $path
+    }
+    proc AcceptDirectory { directory } {
+	set directory [AcceptAbsolutePath $directory]
+	if {![file exists $directory]} {
+	    return -code error "\"$directory\" does not exist"
+	}
+	if {![file isdir $directory]} {
+	    return -code error "\"$directory\" is not a directory"
+	}
+	return [AcceptReadable $directory]
+    }
+
+##### Initialize internal arrays of tcltest, but only if the caller
+    # has not already pre-initialized them.  This is done to support
+    # compatibility with older tests that directly access internals
+    # rather than go through command interfaces.
+    #
+    proc ArrayDefault {varName value} {
+	variable $varName
+	if {[array exists $varName]} {
+	    return
+	}
+	if {[info exists $varName]} {
+	    # Pre-initialized value is a scalar: destroy it!
+	    unset $varName
+	}
+	array set $varName $value
+    }
+
+    # save the original environment so that it can be restored later
+    ArrayDefault originalEnv [array get ::env]
+
+    # initialize numTests array to keep track of the number of tests
+    # that pass, fail, and are skipped.
+    ArrayDefault numTests [list Total 0 Passed 0 Skipped 0 Failed 0]
+
+    # createdNewFiles will store test files as indices and the list of
+    # files (that should not have been) left behind by the test files
+    # as values.
+    ArrayDefault createdNewFiles {}
+
+    # initialize skippedBecause array to keep track of constraints that
+    # kept tests from running; a constraint name of "userSpecifiedSkip"
+    # means that the test appeared on the list of tests that matched the
+    # -skip value given to the flag; "userSpecifiedNonMatch" means that
+    # the test didn't match the argument given to the -match flag; both
+    # of these constraints are counted only if tcltest::debug is set to
+    # true.
+    ArrayDefault skippedBecause {}
+
+    # initialize the testConstraints array to keep track of valid
+    # predefined constraints (see the explanation for the
+    # InitConstraints proc for more details).
+    ArrayDefault testConstraints {}
+
+##### Initialize internal variables of tcltest, but only if the caller
+    # has not already pre-initialized them.  This is done to support
+    # compatibility with older tests that directly access internals
+    # rather than go through command interfaces.
+    #
+    proc Default {varName value {verify AcceptAll}} {
+	variable $varName
+	if {![info exists $varName]} {
+	    variable $varName [$verify $value]
+	} else {
+	    variable $varName [$verify [set $varName]]
+	}
+    }
+
+    # Save any arguments that we might want to pass through to other
+    # programs.  This is used by the -args flag.
+    # FINDUSER
+    Default parameters {}
+
+    # Count the number of files tested (0 if runAllTests wasn't called).
+    # runAllTests will set testSingleFile to false, so stats will
+    # not be printed until runAllTests calls the cleanupTests proc.
+    # The currentFailure var stores the boolean value of whether the
+    # current test file has had any failures.  The failFiles list
+    # stores the names of test files that had failures.
+    Default numTestFiles 0 AcceptInteger
+    Default testSingleFile true AcceptBoolean
+    Default currentFailure false AcceptBoolean
+    Default failFiles {} AcceptList
+
+    # Tests should remove all files they create.  The test suite will
+    # check the current working dir for files created by the tests.
+    # filesMade keeps track of such files created using the makeFile and
+    # makeDirectory procedures.  filesExisted stores the names of
+    # pre-existing files.
+    #
+    # Note that $filesExisted lists only those files that exist in
+    # the original [temporaryDirectory].
+    Default filesMade {} AcceptList
+    Default filesExisted {} AcceptList
+    proc FillFilesExisted {} {
+	variable filesExisted
+
+	# Save the names of files that already exist in the scratch directory.
+	foreach file [glob -nocomplain -directory [temporaryDirectory] *] {
+	    lappend filesExisted [file tail $file]
+	}
+
+	# After successful filling, turn this into a no-op.
+	proc FillFilesExisted args {}
+    }
+
+    # Kept only for compatibility
+    Default constraintsSpecified {} AcceptList
+    trace add variable constraintsSpecified read [namespace code {
+	    set constraintsSpecified [array names testConstraints] ;#}]
+
+    # tests that use threads need to know which is the main thread
+    Default mainThread 1
+    variable mainThread
+    if {[info commands thread::id] ne {}} {
+	set mainThread [thread::id]
+    } elseif {[info commands testthread] ne {}} {
+	set mainThread [testthread id]
+    }
+
+    # Set workingDirectory to [pwd]. The default output directory for
+    # Tcl tests is the working directory.  Whenever this value changes
+    # change to that directory.
+    variable workingDirectory
+    trace add variable workingDirectory write \
+	    [namespace code {cd $workingDirectory ;#}]
+
+    Default workingDirectory [pwd] AcceptAbsolutePath
+    proc workingDirectory { {dir ""} } {
+	variable workingDirectory
+	if {[llength [info level 0]] == 1} {
+	    return $workingDirectory
+	}
+	set workingDirectory [AcceptAbsolutePath $dir]
+    }
+
+    # Set the location of the execuatble
+    Default tcltest [info nameofexecutable]
+    trace add variable tcltest write [namespace code {testConstraint stdio \
+	    [eval [ConstraintInitializer stdio]] ;#}]
+
+    # save the platform information so it can be restored later
+    Default originalTclPlatform [array get ::tcl_platform]
+
+    # If a core file exists, save its modification time.
+    if {[file exists [file join [workingDirectory] core]]} {
+	Default coreModTime \
+		[file mtime [file join [workingDirectory] core]]
+    }
+
+    # stdout and stderr buffers for use when we want to store them
+    Default outData {}
+    Default errData {}
+
+    # keep track of test level for nested test commands
+    variable testLevel 0
+
+    # the variables and procs that existed when saveState was called are
+    # stored in a variable of the same name
+    Default saveState {}
+
+    # Internationalization support -- used in [SetIso8859_1_Locale] and
+    # [RestoreLocale]. Those commands are used in cmdIL.test.
+
+    if {![info exists [namespace current]::isoLocale]} {
+	variable isoLocale fr
+	switch -- $::tcl_platform(platform) {
+	    "unix" {
+
+		# Try some 'known' values for some platforms:
+
+		switch -exact -- $::tcl_platform(os) {
+		    "FreeBSD" {
+			set isoLocale fr_FR.ISO_8859-1
+		    }
+		    HP-UX {
+			set isoLocale fr_FR.iso88591
+		    }
+		    Linux -
+		    IRIX {
+			set isoLocale fr
+		    }
+		    default {
+
+			# Works on SunOS 4 and Solaris, and maybe
+			# others...  Define it to something else on your
+			# system if you want to test those.
+
+			set isoLocale iso_8859_1
+		    }
+		}
+	    }
+	    "windows" {
+		set isoLocale French
+	    }
+	}
+    }
+
+    variable ChannelsWeOpened; array set ChannelsWeOpened {}
+    # output goes to stdout by default
+    Default outputChannel stdout
+    proc outputChannel { {filename ""} } {
+	variable outputChannel
+	variable ChannelsWeOpened
+
+	# This is very subtle and tricky, so let me try to explain.
+	# (Hopefully this longer comment will be clear when I come
+	# back in a few months, unlike its predecessor :) )
+	#
+	# The [outputChannel] command (and underlying variable) have to
+	# be kept in sync with the [configure -outfile] configuration
+	# option ( and underlying variable Option(-outfile) ).  This is
+	# accomplished with a write trace on Option(-outfile) that will
+	# update [outputChannel] whenver a new value is written.  That
+	# much is easy.
+	#
+	# The trick is that in order to maintain compatibility with
+	# version 1 of tcltest, we must allow every configuration option
+	# to get its inital value from command line arguments.  This is
+	# accomplished by setting initial read traces on all the
+	# configuration options to parse the command line option the first
+	# time they are read.  These traces are cancelled whenever the
+	# program itself calls [configure].
+	#
+	# OK, then so to support tcltest 1 compatibility, it seems we want
+	# to get the return from [outputFile] to trigger the read traces,
+	# just in case.
+	#
+	# BUT!  A little known feature of Tcl variable traces is that
+	# traces are disabled during the handling of other traces.  So,
+	# if we trigger read traces on Option(-outfile) and that triggers
+	# command line parsing which turns around and sets an initial
+	# value for Option(-outfile) -- <whew!> -- the write trace that
+	# would keep [outputChannel] in sync with that new initial value
+	# would not fire!
+	#
+	# SO, finally, as a workaround, instead of triggering read traces
+	# by invoking [outputFile], we instead trigger the same set of
+	# read traces by invoking [debug].  Any command that reads a
+	# configuration option would do.  [debug] is just a handy one.
+	# The end result is that we support tcltest 1 compatibility and
+	# keep outputChannel and -outfile in sync in all cases.
+	debug
+
+	if {[llength [info level 0]] == 1} {
+	    return $outputChannel
+	}
+	if {[info exists ChannelsWeOpened($outputChannel)]} {
+	    close $outputChannel
+	    unset ChannelsWeOpened($outputChannel)
+	}
+	switch -exact -- $filename {
+	    stderr -
+	    stdout {
+		set outputChannel $filename
+	    }
+	    default {
+		set outputChannel [open $filename a]
+		set ChannelsWeOpened($outputChannel) 1
+
+		# If we created the file in [temporaryDirectory], then
+		# [cleanupTests] will delete it, unless we claim it was
+		# already there.
+		set outdir [normalizePath [file dirname \
+			[file join [pwd] $filename]]]
+		if {$outdir eq [temporaryDirectory]} {
+		    variable filesExisted
+		    FillFilesExisted
+		    set filename [file tail $filename]
+		    if {$filename ni $filesExisted} {
+			lappend filesExisted $filename
+		    }
+		}
+	    }
+	}
+	return $outputChannel
+    }
+
+    # errors go to stderr by default
+    Default errorChannel stderr
+    proc errorChannel { {filename ""} } {
+	variable errorChannel
+	variable ChannelsWeOpened
+
+	# This is subtle and tricky.  See the comment above in
+	# [outputChannel] for a detailed explanation.
+	debug
+
+	if {[llength [info level 0]] == 1} {
+	    return $errorChannel
+	}
+	if {[info exists ChannelsWeOpened($errorChannel)]} {
+	    close $errorChannel
+	    unset ChannelsWeOpened($errorChannel)
+	}
+	switch -exact -- $filename {
+	    stderr -
+	    stdout {
+		set errorChannel $filename
+	    }
+	    default {
+		set errorChannel [open $filename a]
+		set ChannelsWeOpened($errorChannel) 1
+
+		# If we created the file in [temporaryDirectory], then
+		# [cleanupTests] will delete it, unless we claim it was
+		# already there.
+		set outdir [normalizePath [file dirname \
+			[file join [pwd] $filename]]]
+		if {$outdir eq [temporaryDirectory]} {
+		    variable filesExisted
+		    FillFilesExisted
+		    set filename [file tail $filename]
+		    if {$filename ni $filesExisted} {
+			lappend filesExisted $filename
+		    }
+		}
+	    }
+	}
+	return $errorChannel
+    }
+
+##### Set up the configurable options
+    #
+    # The configurable options of the package
+    variable Option; array set Option {}
+
+    # Usage strings for those options
+    variable Usage; array set Usage {}
+
+    # Verification commands for those options
+    variable Verify; array set Verify {}
+
+    # Initialize the default values of the configurable options that are
+    # historically associated with an exported variable.  If that variable
+    # is already set, support compatibility by accepting its pre-set value.
+    # Use [trace] to establish ongoing connection between the deprecated
+    # exported variable and the modern option kept as a true internal var.
+    # Also set up usage string and value testing for the option.
+    proc Option {option value usage {verify AcceptAll} {varName {}}} {
+	variable Option
+	variable Verify
+	variable Usage
+	variable OptionControlledVariables
+	variable DefaultValue
+	set Usage($option) $usage
+	set Verify($option) $verify
+	set DefaultValue($option) $value
+	if {[catch {$verify $value} msg]} {
+	    return -code error $msg
+	} else {
+	    set Option($option) $msg
+	}
+	if {[string length $varName]} {
+	    variable $varName
+	    if {[info exists $varName]} {
+		if {[catch {$verify [set $varName]} msg]} {
+		    return -code error $msg
+		} else {
+		    set Option($option) $msg
+		}
+		unset $varName
+	    }
+	    namespace eval [namespace current] \
+	    	    [list upvar 0 Option($option) $varName]
+	    # Workaround for Bug (now Feature Request) 572889.  Grrrr....
+	    # Track all the variables tied to options
+	    lappend OptionControlledVariables $varName
+	    # Later, set auto-configure read traces on all
+	    # of them, since a single trace on Option does not work.
+	    proc $varName {{value {}}} [subst -nocommands {
+		if {[llength [info level 0]] == 2} {
+		    Configure $option [set value]
+		}
+		return [Configure $option]
+	    }]
+	}
+    }
+
+    proc MatchingOption {option} {
+	variable Option
+	set match [array names Option $option*]
+	switch -- [llength $match] {
+	    0 {
+		set sorted [lsort [array names Option]]
+		set values [join [lrange $sorted 0 end-1] ", "]
+		append values ", or [lindex $sorted end]"
+		return -code error "unknown option $option: should be\
+			one of $values"
+	    }
+	    1 {
+		return [lindex $match 0]
+	    }
+	    default {
+		# Exact match trumps ambiguity
+		if {$option in $match} {
+		    return $option
+		}
+		set values [join [lrange $match 0 end-1] ", "]
+		append values ", or [lindex $match end]"
+		return -code error "ambiguous option $option:\
+			could match $values"
+	    }
+	}
+    }
+
+    proc EstablishAutoConfigureTraces {} {
+	variable OptionControlledVariables
+	foreach varName [concat $OptionControlledVariables Option] {
+	    variable $varName
+	    trace add variable $varName read [namespace code {
+		    ProcessCmdLineArgs ;#}]
+	}
+    }
+
+    proc RemoveAutoConfigureTraces {} {
+	variable OptionControlledVariables
+	foreach varName [concat $OptionControlledVariables Option] {
+	    variable $varName
+	    foreach pair [trace info variable $varName] {
+		lassign $pair op cmd
+		if {($op eq "read") &&
+			[string match *ProcessCmdLineArgs* $cmd]} {
+		    trace remove variable $varName $op $cmd
+		}
+	    }
+	}
+	# Once the traces are removed, this can become a no-op
+	proc RemoveAutoConfigureTraces {} {}
+    }
+
+    proc Configure args {
+	variable Option
+	variable Verify
+	set n [llength $args]
+	if {$n == 0} {
+	    return [lsort [array names Option]]
+	}
+	if {$n == 1} {
+	    if {[catch {MatchingOption [lindex $args 0]} option]} {
+		return -code error $option
+	    }
+	    return $Option($option)
+	}
+	while {[llength $args] > 1} {
+	    if {[catch {MatchingOption [lindex $args 0]} option]} {
+		return -code error $option
+	    }
+	    if {[catch {$Verify($option) [lindex $args 1]} value]} {
+		return -code error "invalid $option\
+			value \"[lindex $args 1]\": $value"
+	    }
+	    set Option($option) $value
+	    set args [lrange $args 2 end]
+	}
+	if {[llength $args]} {
+	    if {[catch {MatchingOption [lindex $args 0]} option]} {
+		return -code error $option
+	    }
+	    return -code error "missing value for option $option"
+	}
+    }
+    proc configure args {
+	if {[llength $args] > 1} {
+	    RemoveAutoConfigureTraces
+	}
+	set code [catch {Configure {*}$args} msg]
+	return -code $code $msg
+    }
+
+    proc AcceptVerbose { level } {
+	set level [AcceptList $level]
+	set levelMap {
+	    l list
+	    p pass
+	    b body
+	    s skip
+	    t start
+	    e error
+	    l line
+	    m msec
+	    u usec
+	}
+	set levelRegexp "^([join [dict values $levelMap] |])\$"
+	if {[llength $level] == 1} {
+	    if {![regexp $levelRegexp $level]} {
+		# translate single characters abbreviations to expanded list
+		set level [string map $levelMap [split $level {}]]
+	    }
+	}
+	set valid [list]
+	foreach v $level {
+	    if {[regexp $levelRegexp $v]} {
+		lappend valid $v
+	    }
+	}
+	return $valid
+    }
+
+    proc IsVerbose {level} {
+	variable Option
+	return [expr {[lsearch -exact $Option(-verbose) $level] != -1}]
+    }
+
+    # Default verbosity is to show bodies of failed tests
+    Option -verbose {body error} {
+	Takes any combination of the values 'p', 's', 'b', 't', 'e' and 'l'.
+	Test suite will display all passed tests if 'p' is specified, all
+	skipped tests if 's' is specified, the bodies of failed tests if
+	'b' is specified, and when tests start if 't' is specified.
+	ErrorInfo is displayed if 'e' is specified. Source file line
+	information of failed tests is displayed if 'l' is specified.
+    } AcceptVerbose verbose
+
+    # Match and skip patterns default to the empty list, except for
+    # matchFiles, which defaults to all .test files in the
+    # testsDirectory and matchDirectories, which defaults to all
+    # directories.
+    Option -match * {
+	Run all tests within the specified files that match one of the
+	list of glob patterns given.
+    } AcceptList match
+
+    Option -skip {} {
+	Skip all tests within the specified tests (via -match) and files
+	that match one of the list of glob patterns given.
+    } AcceptList skip
+
+    Option -file *.test {
+	Run tests in all test files that match the glob pattern given.
+    } AcceptPattern matchFiles
+
+    # By default, skip files that appear to be SCCS lock files.
+    Option -notfile l.*.test {
+	Skip all test files that match the glob pattern given.
+    } AcceptPattern skipFiles
+
+    Option -relateddir * {
+	Run tests in directories that match the glob pattern given.
+    } AcceptPattern matchDirectories
+
+    Option -asidefromdir {} {
+	Skip tests in directories that match the glob pattern given.
+    } AcceptPattern skipDirectories
+
+    # By default, don't save core files
+    Option -preservecore 0 {
+	If 2, save any core files produced during testing in the directory
+	specified by -tmpdir. If 1, notify the user if core files are
+	created.
+    } AcceptInteger preserveCore
+
+    # debug output doesn't get printed by default; debug level 1 spits
+    # up only the tests that were skipped because they didn't match or
+    # were specifically skipped.  A debug level of 2 would spit up the
+    # tcltest variables and flags provided; a debug level of 3 causes
+    # some additional output regarding operations of the test harness.
+    # The tcltest package currently implements only up to debug level 3.
+    Option -debug 0 {
+	Internal debug level
+    } AcceptInteger debug
+
+    proc SetSelectedConstraints args {
+	variable Option
+	foreach c $Option(-constraints) {
+	    testConstraint $c 1
+	}
+    }
+    Option -constraints {} {
+	Do not skip the listed constraints listed in -constraints.
+    } AcceptList
+    trace add variable Option(-constraints) write \
+	    [namespace code {SetSelectedConstraints ;#}]
+
+    # Don't run only the "-constraint" specified tests by default
+    proc ClearUnselectedConstraints args {
+	variable Option
+	variable testConstraints
+	if {!$Option(-limitconstraints)} {return}
+	foreach c [array names testConstraints] {
+	    if {$c ni $Option(-constraints)} {
+		testConstraint $c 0
+	    }
+	}
+    }
+    Option -limitconstraints 0 {
+	whether to run only tests with the constraints
+    } AcceptBoolean limitConstraints
+    trace add variable Option(-limitconstraints) write \
+	    [namespace code {ClearUnselectedConstraints ;#}]
+
+    # A test application has to know how to load the tested commands
+    # into the interpreter.
+    Option -load {} {
+	Specifies the script to load the tested commands.
+    } AcceptScript loadScript
+
+    # Default is to run each test file in a separate process
+    Option -singleproc 0 {
+	whether to run all tests in one process
+    } AcceptBoolean singleProcess
+
+    proc AcceptTemporaryDirectory { directory } {
+	set directory [AcceptAbsolutePath $directory]
+	if {![file exists $directory]} {
+	    file mkdir $directory
+	}
+	set directory [AcceptDirectory $directory]
+	if {![file writable $directory]} {
+	    if {[workingDirectory] eq $directory} {
+		# Special exception: accept the default value
+		# even if the directory is not writable
+		return $directory
+	    }
+	    return -code error "\"$directory\" is not writeable"
+	}
+	return $directory
+    }
+
+    # Directory where files should be created
+    Option -tmpdir [workingDirectory] {
+	Save temporary files in the specified directory.
+    } AcceptTemporaryDirectory temporaryDirectory
+    trace add variable Option(-tmpdir) write \
+	    [namespace code {normalizePath Option(-tmpdir) ;#}]
+
+    # Tests should not rely on the current working directory.
+    # Files that are part of the test suite should be accessed relative
+    # to [testsDirectory]
+    Option -testdir [workingDirectory] {
+	Search tests in the specified directory.
+    } AcceptDirectory testsDirectory
+    trace add variable Option(-testdir) write \
+	    [namespace code {normalizePath Option(-testdir) ;#}]
+
+    proc AcceptLoadFile { file } {
+	if {$file eq {}} {return $file}
+	set file [file join [temporaryDirectory] $file]
+	return [AcceptReadable $file]
+    }
+    proc ReadLoadScript {args} {
+	variable Option
+	if {$Option(-loadfile) eq {}} {return}
+	set tmp [open $Option(-loadfile) r]
+	loadScript [read $tmp]
+	close $tmp
+    }
+    Option -loadfile {} {
+	Read the script to load the tested commands from the specified file.
+    } AcceptLoadFile loadFile
+    trace add variable Option(-loadfile) write [namespace code ReadLoadScript]
+
+    proc AcceptOutFile { file } {
+	if {[string equal stderr $file]} {return $file}
+	if {[string equal stdout $file]} {return $file}
+	return [file join [temporaryDirectory] $file]
+    }
+
+    # output goes to stdout by default
+    Option -outfile stdout {
+	Send output from test runs to the specified file.
+    } AcceptOutFile outputFile
+    trace add variable Option(-outfile) write \
+	    [namespace code {outputChannel $Option(-outfile) ;#}]
+
+    # errors go to stderr by default
+    Option -errfile stderr {
+	Send errors from test runs to the specified file.
+    } AcceptOutFile errorFile
+    trace add variable Option(-errfile) write \
+	    [namespace code {errorChannel $Option(-errfile) ;#}]
+
+    proc loadIntoSlaveInterpreter {slave args} {
+	variable Version
+	interp eval $slave [package ifneeded tcltest $Version]
+	interp eval $slave "tcltest::configure {*}{$args}"
+	interp alias $slave ::tcltest::ReportToMaster \
+	    {} ::tcltest::ReportedFromSlave
+    }
+    proc ReportedFromSlave {total passed skipped failed because newfiles} {
+	variable numTests
+	variable skippedBecause
+	variable createdNewFiles
+	incr numTests(Total)   $total
+	incr numTests(Passed)  $passed
+	incr numTests(Skipped) $skipped
+	incr numTests(Failed)  $failed
+	foreach {constraint count} $because {
+	    incr skippedBecause($constraint) $count
+	}
+	foreach {testfile created} $newfiles {
+	    lappend createdNewFiles($testfile) {*}$created
+	}
+	return
+    }
+}
+
+#####################################################################
+
+# tcltest::Debug* --
+#
+#     Internal helper procedures to write out debug information
+#     dependent on the chosen level. A test shell may overide
+#     them, f.e. to redirect the output into a different
+#     channel, or even into a GUI.
+
+# tcltest::DebugPuts --
+#
+#     Prints the specified string if the current debug level is
+#     higher than the provided level argument.
+#
+# Arguments:
+#     level   The lowest debug level triggering the output
+#     string  The string to print out.
+#
+# Results:
+#     Prints the string. Nothing else is allowed.
+#
+# Side Effects:
+#     None.
+#
+
+proc tcltest::DebugPuts {level string} {
+    variable debug
+    if {$debug >= $level} {
+	puts $string
+    }
+    return
+}
+
+# tcltest::DebugPArray --
+#
+#     Prints the contents of the specified array if the current
+#       debug level is higher than the provided level argument
+#
+# Arguments:
+#     level           The lowest debug level triggering the output
+#     arrayvar        The name of the array to print out.
+#
+# Results:
+#     Prints the contents of the array. Nothing else is allowed.
+#
+# Side Effects:
+#     None.
+#
+
+proc tcltest::DebugPArray {level arrayvar} {
+    variable debug
+
+    if {$debug >= $level} {
+	catch {upvar 1 $arrayvar $arrayvar}
+	parray $arrayvar
+    }
+    return
+}
+
+# Define our own [parray] in ::tcltest that will inherit use of the [puts]
+# defined in ::tcltest.  NOTE: Ought to construct with [info args] and
+# [info default], but can't be bothered now.  If [parray] changes, then
+# this will need changing too.
+auto_load ::parray
+proc tcltest::parray {a {pattern *}} [info body ::parray]
+
+# tcltest::DebugDo --
+#
+#     Executes the script if the current debug level is greater than
+#       the provided level argument
+#
+# Arguments:
+#     level   The lowest debug level triggering the execution.
+#     script  The tcl script executed upon a debug level high enough.
+#
+# Results:
+#     Arbitrary side effects, dependent on the executed script.
+#
+# Side Effects:
+#     None.
+#
+
+proc tcltest::DebugDo {level script} {
+    variable debug
+
+    if {$debug >= $level} {
+	uplevel 1 $script
+    }
+    return
+}
+
+#####################################################################
+
+proc tcltest::Warn {msg} {
+    puts [outputChannel] "WARNING: $msg"
+}
+
+# tcltest::mainThread
+#
+#     Accessor command for tcltest variable mainThread.
+#
+proc tcltest::mainThread { {new ""} } {
+    variable mainThread
+    if {[llength [info level 0]] == 1} {
+	return $mainThread
+    }
+    set mainThread $new
+}
+
+# tcltest::testConstraint --
+#
+#	sets a test constraint to a value; to do multiple constraints,
+#       call this proc multiple times.  also returns the value of the
+#       named constraint if no value was supplied.
+#
+# Arguments:
+#	constraint - name of the constraint
+#       value - new value for constraint (should be boolean) - if not
+#               supplied, this is a query
+#
+# Results:
+#	content of tcltest::testConstraints($constraint)
+#
+# Side effects:
+#	none
+
+proc tcltest::testConstraint {constraint {value ""}} {
+    variable testConstraints
+    variable Option
+    DebugPuts 3 "entering testConstraint $constraint $value"
+    if {[llength [info level 0]] == 2} {
+	return $testConstraints($constraint)
+    }
+    # Check for boolean values
+    if {[catch {expr {$value && $value}} msg]} {
+	return -code error $msg
+    }
+    if {[limitConstraints] && ($constraint ni $Option(-constraints))} {
+	set value 0
+    }
+    set testConstraints($constraint) $value
+}
+
+# tcltest::interpreter --
+#
+#	the interpreter name stored in tcltest::tcltest
+#
+# Arguments:
+#	executable name
+#
+# Results:
+#	content of tcltest::tcltest
+#
+# Side effects:
+#	None.
+
+proc tcltest::interpreter { {interp ""} } {
+    variable tcltest
+    if {[llength [info level 0]] == 1} {
+	return $tcltest
+    }
+    set tcltest $interp
+}
+
+#####################################################################
+
+# tcltest::AddToSkippedBecause --
+#
+#	Increments the variable used to track how many tests were
+#       skipped because of a particular constraint.
+#
+# Arguments:
+#	constraint     The name of the constraint to be modified
+#
+# Results:
+#	Modifies tcltest::skippedBecause; sets the variable to 1 if
+#       didn't previously exist - otherwise, it just increments it.
+#
+# Side effects:
+#	None.
+
+proc tcltest::AddToSkippedBecause { constraint {value 1}} {
+    # add the constraint to the list of constraints that kept tests
+    # from running
+    variable skippedBecause
+
+    if {[info exists skippedBecause($constraint)]} {
+	incr skippedBecause($constraint) $value
+    } else {
+	set skippedBecause($constraint) $value
+    }
+    return
+}
+
+# tcltest::PrintError --
+#
+#	Prints errors to tcltest::errorChannel and then flushes that
+#       channel, making sure that all messages are < 80 characters per
+#       line.
+#
+# Arguments:
+#	errorMsg     String containing the error to be printed
+#
+# Results:
+#	None.
+#
+# Side effects:
+#	None.
+
+proc tcltest::PrintError {errorMsg} {
+    set InitialMessage "Error:  "
+    set InitialMsgLen  [string length $InitialMessage]
+    puts -nonewline [errorChannel] $InitialMessage
+
+    # Keep track of where the end of the string is.
+    set endingIndex [string length $errorMsg]
+
+    if {$endingIndex < (80 - $InitialMsgLen)} {
+	puts [errorChannel] $errorMsg
+    } else {
+	# Print up to 80 characters on the first line, including the
+	# InitialMessage.
+	set beginningIndex [string last " " [string range $errorMsg 0 \
+		[expr {80 - $InitialMsgLen}]]]
+	puts [errorChannel] [string range $errorMsg 0 $beginningIndex]
+
+	while {$beginningIndex ne "end"} {
+	    puts -nonewline [errorChannel] \
+		    [string repeat " " $InitialMsgLen]
+	    if {($endingIndex - $beginningIndex)
+		    < (80 - $InitialMsgLen)} {
+		puts [errorChannel] [string trim \
+			[string range $errorMsg $beginningIndex end]]
+		break
+	    } else {
+		set newEndingIndex [expr {[string last " " \
+			[string range $errorMsg $beginningIndex \
+				[expr {$beginningIndex
+					+ (80 - $InitialMsgLen)}]
+		]] + $beginningIndex}]
+		if {($newEndingIndex <= 0)
+			|| ($newEndingIndex <= $beginningIndex)} {
+		    set newEndingIndex end
+		}
+		puts [errorChannel] [string trim \
+			[string range $errorMsg \
+			    $beginningIndex $newEndingIndex]]
+		set beginningIndex $newEndingIndex
+	    }
+	}
+    }
+    flush [errorChannel]
+    return
+}
+
+# tcltest::SafeFetch --
+#
+#	 The following trace procedure makes it so that we can safely
+#        refer to non-existent members of the testConstraints array
+#        without causing an error.  Instead, reading a non-existent
+#        member will return 0. This is necessary because tests are
+#        allowed to use constraint "X" without ensuring that
+#        testConstraints("X") is defined.
+#
+# Arguments:
+#	n1 - name of the array (testConstraints)
+#       n2 - array key value (constraint name)
+#       op - operation performed on testConstraints (generally r)
+#
+# Results:
+#	none
+#
+# Side effects:
+#	sets testConstraints($n2) to 0 if it's referenced but never
+#       before used
+
+proc tcltest::SafeFetch {n1 n2 op} {
+    variable testConstraints
+    DebugPuts 3 "entering SafeFetch $n1 $n2 $op"
+    if {$n2 eq {}} {return}
+    if {![info exists testConstraints($n2)]} {
+	if {[catch {testConstraint $n2 [eval [ConstraintInitializer $n2]]}]} {
+	    testConstraint $n2 0
+	}
+    }
+}
+
+# tcltest::ConstraintInitializer --
+#
+#	Get or set a script that when evaluated in the tcltest namespace
+#	will return a boolean value with which to initialize the
+#	associated constraint.
+#
+# Arguments:
+#	constraint - name of the constraint initialized by the script
+#	script - the initializer script
+#
+# Results
+#	boolean value of the constraint - enabled or disabled
+#
+# Side effects:
+#	Constraint is initialized for future reference by [test]
+proc tcltest::ConstraintInitializer {constraint {script ""}} {
+    variable ConstraintInitializer
+    DebugPuts 3 "entering ConstraintInitializer $constraint $script"
+    if {[llength [info level 0]] == 2} {
+	return $ConstraintInitializer($constraint)
+    }
+    # Check for boolean values
+    if {![info complete $script]} {
+	return -code error "ConstraintInitializer must be complete script"
+    }
+    set ConstraintInitializer($constraint) $script
+}
+
+# tcltest::InitConstraints --
+#
+# Call all registered constraint initializers to force initialization
+# of all known constraints.
+# See the tcltest man page for the list of built-in constraints defined
+# in this procedure.
+#
+# Arguments:
+#	none
+#
+# Results:
+#	The testConstraints array is reset to have an index for each
+#	built-in test constraint.
+#
+# Side Effects:
+#       None.
+#
+
+proc tcltest::InitConstraints {} {
+    variable ConstraintInitializer
+    initConstraintsHook
+    foreach constraint [array names ConstraintInitializer] {
+	testConstraint $constraint
+    }
+}
+
+proc tcltest::DefineConstraintInitializers {} {
+    ConstraintInitializer singleTestInterp {singleProcess}
+
+    # All the 'pc' constraints are here for backward compatibility and
+    # are not documented.  They have been replaced with equivalent 'win'
+    # constraints.
+
+    ConstraintInitializer unixOnly \
+	    {string equal $::tcl_platform(platform) unix}
+    ConstraintInitializer macOnly \
+	    {string equal $::tcl_platform(platform) macintosh}
+    ConstraintInitializer pcOnly \
+	    {string equal $::tcl_platform(platform) windows}
+    ConstraintInitializer winOnly \
+	    {string equal $::tcl_platform(platform) windows}
+
+    ConstraintInitializer unix {testConstraint unixOnly}
+    ConstraintInitializer mac {testConstraint macOnly}
+    ConstraintInitializer pc {testConstraint pcOnly}
+    ConstraintInitializer win {testConstraint winOnly}
+
+    ConstraintInitializer unixOrPc \
+	    {expr {[testConstraint unix] || [testConstraint pc]}}
+    ConstraintInitializer macOrPc \
+	    {expr {[testConstraint mac] || [testConstraint pc]}}
+    ConstraintInitializer unixOrWin \
+	    {expr {[testConstraint unix] || [testConstraint win]}}
+    ConstraintInitializer macOrWin \
+	    {expr {[testConstraint mac] || [testConstraint win]}}
+    ConstraintInitializer macOrUnix \
+	    {expr {[testConstraint mac] || [testConstraint unix]}}
+
+    ConstraintInitializer nt {string equal $::tcl_platform(os) "Windows NT"}
+    ConstraintInitializer 95 {string equal $::tcl_platform(os) "Windows 95"}
+    ConstraintInitializer 98 {string equal $::tcl_platform(os) "Windows 98"}
+
+    # The following Constraints switches are used to mark tests that
+    # should work, but have been temporarily disabled on certain
+    # platforms because they don't and we haven't gotten around to
+    # fixing the underlying problem.
+
+    ConstraintInitializer tempNotPc {expr {![testConstraint pc]}}
+    ConstraintInitializer tempNotWin {expr {![testConstraint win]}}
+    ConstraintInitializer tempNotMac {expr {![testConstraint mac]}}
+    ConstraintInitializer tempNotUnix {expr {![testConstraint unix]}}
+
+    # The following Constraints switches are used to mark tests that
+    # crash on certain platforms, so that they can be reactivated again
+    # when the underlying problem is fixed.
+
+    ConstraintInitializer pcCrash {expr {![testConstraint pc]}}
+    ConstraintInitializer winCrash {expr {![testConstraint win]}}
+    ConstraintInitializer macCrash {expr {![testConstraint mac]}}
+    ConstraintInitializer unixCrash {expr {![testConstraint unix]}}
+
+    # Skip empty tests
+
+    ConstraintInitializer emptyTest {format 0}
+
+    # By default, tests that expose known bugs are skipped.
+
+    ConstraintInitializer knownBug {format 0}
+
+    # By default, non-portable tests are skipped.
+
+    ConstraintInitializer nonPortable {format 0}
+
+    # Some tests require user interaction.
+
+    ConstraintInitializer userInteraction {format 0}
+
+    # Some tests must be skipped if the interpreter is not in
+    # interactive mode
+
+    ConstraintInitializer interactive \
+	    {expr {[info exists ::tcl_interactive] && $::tcl_interactive}}
+
+    # Some tests can only be run if the installation came from a CD
+    # image instead of a web image.  Some tests must be skipped if you
+    # are running as root on Unix.  Other tests can only be run if you
+    # are running as root on Unix.
+
+    ConstraintInitializer root {expr \
+	    {($::tcl_platform(platform) eq "unix") &&
+		    ($::tcl_platform(user) in {root {}})}}
+    ConstraintInitializer notRoot {expr {![testConstraint root]}}
+
+    # Set nonBlockFiles constraint: 1 means this platform supports
+    # setting files into nonblocking mode.
+
+    ConstraintInitializer nonBlockFiles {
+	    set code [expr {[catch {set f [open defs r]}]
+		    || [catch {chan configure $f -blocking off}]}]
+	    catch {close $f}
+	    set code
+    }
+
+    # Set asyncPipeClose constraint: 1 means this platform supports
+    # async flush and async close on a pipe.
+    #
+    # Test for SCO Unix - cannot run async flushing tests because a
+    # potential problem with select is apparently interfering.
+    # (Mark Diekhans).
+
+    ConstraintInitializer asyncPipeClose {expr {
+	    !([string equal unix $::tcl_platform(platform)]
+	    && ([catch {exec uname -X | fgrep {Release = 3.2v}}] == 0))}}
+
+    # Test to see if we have a broken version of sprintf with respect
+    # to the "e" format of floating-point numbers.
+
+    ConstraintInitializer eformat {string equal [format %g 5e-5] 5e-05}
+
+    # Test to see if execed commands such as cat, echo, rm and so forth
+    # are present on this machine.
+
+    ConstraintInitializer unixExecs {
+	set code 1
+        if {$::tcl_platform(platform) eq "macintosh"} {
+	    set code 0
+        }
+        if {$::tcl_platform(platform) eq "windows"} {
+	    if {[catch {
+	        set file _tcl_test_remove_me.txt
+	        makeFile {hello} $file
+	    }]} {
+	        set code 0
+	    } elseif {
+	        [catch {exec cat $file}] ||
+	        [catch {exec echo hello}] ||
+	        [catch {exec sh -c echo hello}] ||
+	        [catch {exec wc $file}] ||
+	        [catch {exec sleep 1}] ||
+	        [catch {exec echo abc > $file}] ||
+	        [catch {exec chmod 644 $file}] ||
+	        [catch {exec rm $file}] ||
+	        [llength [auto_execok mkdir]] == 0 ||
+	        [llength [auto_execok fgrep]] == 0 ||
+	        [llength [auto_execok grep]] == 0 ||
+	        [llength [auto_execok ps]] == 0
+	    } {
+	        set code 0
+	    }
+	    removeFile $file
+        }
+	set code
+    }
+
+    ConstraintInitializer stdio {
+	set code 0
+	if {![catch {set f [open "|[list [interpreter]]" w]}]} {
+	    if {![catch {puts $f exit}]} {
+		if {![catch {close $f}]} {
+		    set code 1
+		}
+	    }
+	}
+	set code
+    }
+
+    # Deliberately call socket with the wrong number of arguments.  The
+    # error message you get will indicate whether sockets are available
+    # on this system.
+
+    ConstraintInitializer socket {
+	catch {socket} msg
+	string compare $msg "sockets are not available on this system"
+    }
+
+    # Check for internationalization
+    ConstraintInitializer hasIsoLocale {
+	if {[llength [info commands testlocale]] == 0} {
+	    set code 0
+	} else {
+	    set code [string length [SetIso8859_1_Locale]]
+	    RestoreLocale
+	}
+	set code
+    }
+
+}
+#####################################################################
+
+# Usage and command line arguments processing.
+
+# tcltest::PrintUsageInfo
+#
+#	Prints out the usage information for package tcltest.  This can
+#	be customized with the redefinition of [PrintUsageInfoHook].
+#
+# Arguments:
+#	none
+#
+# Results:
+#       none
+#
+# Side Effects:
+#       none
+proc tcltest::PrintUsageInfo {} {
+    puts [Usage]
+    PrintUsageInfoHook
+}
+
+proc tcltest::Usage { {option ""} } {
+    variable Usage
+    variable Verify
+    if {[llength [info level 0]] == 1} {
+	set msg "Usage: [file tail [info nameofexecutable]] script "
+	append msg "?-help? ?flag value? ... \n"
+	append msg "Available flags (and valid input values) are:"
+
+	set max 0
+	set allOpts [concat -help [Configure]]
+	foreach opt $allOpts {
+	    set foo [Usage $opt]
+	    lassign $foo x type($opt) usage($opt)
+	    set line($opt) "  $opt $type($opt)  "
+	    set length($opt) [string length $line($opt)]
+	    if {$length($opt) > $max} {set max $length($opt)}
+	}
+	set rest [expr {72 - $max}]
+	foreach opt $allOpts {
+	    append msg \n$line($opt)
+	    append msg [string repeat " " [expr {$max - $length($opt)}]]
+	    set u [string trim $usage($opt)]
+	    catch {append u "  (default: \[[Configure $opt]])"}
+	    regsub -all {\s*\n\s*} $u " " u
+	    while {[string length $u] > $rest} {
+		set break [string wordstart $u $rest]
+		if {$break == 0} {
+		    set break [string wordend $u 0]
+		}
+		append msg [string range $u 0 [expr {$break - 1}]]
+		set u [string trim [string range $u $break end]]
+		append msg \n[string repeat " " $max]
+	    }
+	    append msg $u
+	}
+	return $msg\n
+    } elseif {$option eq "-help"} {
+	return [list -help "" "Display this usage information."]
+    } else {
+	set type [lindex [info args $Verify($option)] 0]
+	return [list $option $type $Usage($option)]
+    }
+}
+
+# tcltest::ProcessFlags --
+#
+#	process command line arguments supplied in the flagArray - this
+#	is called by processCmdLineArgs.  Modifies tcltest variables
+#	according to the content of the flagArray.
+#
+# Arguments:
+#	flagArray - array containing name/value pairs of flags
+#
+# Results:
+#	sets tcltest variables according to their values as defined by
+#       flagArray
+#
+# Side effects:
+#	None.
+
+proc tcltest::ProcessFlags {flagArray} {
+    # Process -help first
+    if {"-help" in $flagArray} {
+	PrintUsageInfo
+	exit 1
+    }
+
+    if {[llength $flagArray] == 0} {
+	RemoveAutoConfigureTraces
+    } else {
+	set args $flagArray
+	while {[llength $args] > 1 && [catch {configure {*}$args} msg]} {
+
+	    # Something went wrong parsing $args for tcltest options
+	    # Check whether the problem is "unknown option"
+	    if {[regexp {^unknown option (\S+):} $msg -> option]} {
+		# Could be this is an option the Hook knows about
+		set moreOptions [processCmdLineArgsAddFlagsHook]
+		if {$option ni $moreOptions} {
+		    # Nope.  Report the error, including additional options,
+		    # but keep going
+		    if {[llength $moreOptions]} {
+			append msg ", "
+			append msg [join [lrange $moreOptions 0 end-1] ", "]
+			append msg "or [lindex $moreOptions end]"
+		    }
+		    Warn $msg
+		}
+	    } else {
+		# error is something other than "unknown option"
+		# notify user of the error; and exit
+		puts [errorChannel] $msg
+		exit 1
+	    }
+
+	    # To recover, find that unknown option and remove up to it.
+	    # then retry
+	    while {[lindex $args 0] ne $option} {
+		set args [lrange $args 2 end]
+	    }
+	    set args [lrange $args 2 end]
+	}
+	if {[llength $args] == 1} {
+	    puts [errorChannel] \
+		    "missing value for option [lindex $args 0]"
+	    exit 1
+	}
+    }
+
+    # Call the hook
+    catch {
+        array set flag $flagArray
+        processCmdLineArgsHook [array get flag]
+    }
+    return
+}
+
+# tcltest::ProcessCmdLineArgs --
+#
+#       This procedure must be run after constraint initialization is
+#	set up (by [DefineConstraintInitializers]) because some constraints
+#	can be overridden.
+#
+#       Perform configuration according to the command-line options.
+#
+# Arguments:
+#	none
+#
+# Results:
+#	Sets the above-named variables in the tcltest namespace.
+#
+# Side Effects:
+#       None.
+#
+
+proc tcltest::ProcessCmdLineArgs {} {
+    variable originalEnv
+    variable testConstraints
+
+    # The "argv" var doesn't exist in some cases, so use {}.
+    if {![info exists ::argv]} {
+	ProcessFlags {}
+    } else {
+	ProcessFlags $::argv
+    }
+
+    # Spit out everything you know if we're at a debug level 2 or
+    # greater
+    DebugPuts 2 "Flags passed into tcltest:"
+    if {[info exists ::env(TCLTEST_OPTIONS)]} {
+	DebugPuts 2 \
+		"    ::env(TCLTEST_OPTIONS): $::env(TCLTEST_OPTIONS)"
+    }
+    if {[info exists ::argv]} {
+	DebugPuts 2 "    argv: $::argv"
+    }
+    DebugPuts    2 "tcltest::debug              = [debug]"
+    DebugPuts    2 "tcltest::testsDirectory     = [testsDirectory]"
+    DebugPuts    2 "tcltest::workingDirectory   = [workingDirectory]"
+    DebugPuts    2 "tcltest::temporaryDirectory = [temporaryDirectory]"
+    DebugPuts    2 "tcltest::outputChannel      = [outputChannel]"
+    DebugPuts    2 "tcltest::errorChannel       = [errorChannel]"
+    DebugPuts    2 "Original environment (tcltest::originalEnv):"
+    DebugPArray  2 originalEnv
+    DebugPuts    2 "Constraints:"
+    DebugPArray  2 testConstraints
+}
+
+#####################################################################
+
+# Code to run the tests goes here.
+
+# tcltest::TestPuts --
+#
+#	Used to redefine puts in test environment.  Stores whatever goes
+#	out on stdout in tcltest::outData and stderr in errData before
+#	sending it on to the regular puts.
+#
+# Arguments:
+#	same as standard puts
+#
+# Results:
+#	none
+#
+# Side effects:
+#       Intercepts puts; data that would otherwise go to stdout, stderr,
+#	or file channels specified in outputChannel and errorChannel
+#	does not get sent to the normal puts function.
+namespace eval tcltest::Replace {
+    namespace export puts
+}
+proc tcltest::Replace::puts {args} {
+    variable [namespace parent]::outData
+    variable [namespace parent]::errData
+    switch [llength $args] {
+	1 {
+	    # Only the string to be printed is specified
+	    append outData [lindex $args 0]\n
+	    return
+	    # return [Puts [lindex $args 0]]
+	}
+	2 {
+	    # Either -nonewline or channelId has been specified
+	    if {[lindex $args 0] eq "-nonewline"} {
+		append outData [lindex $args end]
+		return
+		# return [Puts -nonewline [lindex $args end]]
+	    } else {
+		set channel [lindex $args 0]
+		set newline \n
+	    }
+	}
+	3 {
+	    if {[lindex $args 0] eq "-nonewline"} {
+		# Both -nonewline and channelId are specified, unless
+		# it's an error.  -nonewline is supposed to be argv[0].
+		set channel [lindex $args 1]
+		set newline ""
+	    }
+	}
+    }
+
+    if {[info exists channel]} {
+	if {$channel in [list [[namespace parent]::outputChannel] stdout]} {
+	    append outData [lindex $args end]$newline
+	    return
+	} elseif {$channel in [list [[namespace parent]::errorChannel] stderr]} {
+	    append errData [lindex $args end]$newline
+	    return
+	}
+    }
+
+    # If we haven't returned by now, we don't know how to handle the
+    # input.  Let puts handle it.
+    return [Puts {*}$args]
+}
+
+# tcltest::Eval --
+#
+#	Evaluate the script in the test environment.  If ignoreOutput is
+#       false, store data sent to stderr and stdout in outData and
+#       errData.  Otherwise, ignore this output altogether.
+#
+# Arguments:
+#	script             Script to evaluate
+#       ?ignoreOutput?     Indicates whether or not to ignore output
+#			   sent to stdout & stderr
+#
+# Results:
+#	result from running the script
+#
+# Side effects:
+#	Empties the contents of outData and errData before running a
+#	test if ignoreOutput is set to 0.
+
+proc tcltest::Eval {script {ignoreOutput 1}} {
+    variable outData
+    variable errData
+    DebugPuts 3 "[lindex [info level 0] 0] called"
+    if {!$ignoreOutput} {
+	set outData {}
+	set errData {}
+	rename ::puts [namespace current]::Replace::Puts
+	namespace eval :: [list namespace import [namespace origin Replace::puts]]
+	namespace import Replace::puts
+    }
+    set result [uplevel 1 $script]
+    if {!$ignoreOutput} {
+	namespace forget puts
+	namespace eval :: namespace forget puts
+	rename [namespace current]::Replace::Puts ::puts
+    }
+    return $result
+}
+
+# tcltest::CompareStrings --
+#
+#	compares the expected answer to the actual answer, depending on
+#	the mode provided.  Mode determines whether a regexp, exact,
+#	glob or custom comparison is done.
+#
+# Arguments:
+#	actual - string containing the actual result
+#       expected - pattern to be matched against
+#       mode - type of comparison to be done
+#
+# Results:
+#	result of the match
+#
+# Side effects:
+#	None.
+
+proc tcltest::CompareStrings {actual expected mode} {
+    variable CustomMatch
+    if {![info exists CustomMatch($mode)]} {
+        return -code error "No matching command registered for `-match $mode'"
+    }
+    set match [namespace eval :: $CustomMatch($mode) [list $expected $actual]]
+    if {[catch {expr {$match && $match}} result]} {
+	return -code error "Invalid result from `-match $mode' command: $result"
+    }
+    return $match
+}
+
+# tcltest::customMatch --
+#
+#	registers a command to be called when a particular type of
+#	matching is required.
+#
+# Arguments:
+#	nickname - Keyword for the type of matching
+#	cmd - Incomplete command that implements that type of matching
+#		when completed with expected string and actual string
+#		and then evaluated.
+#
+# Results:
+#	None.
+#
+# Side effects:
+#	Sets the variable tcltest::CustomMatch
+
+proc tcltest::customMatch {mode script} {
+    variable CustomMatch
+    if {![info complete $script]} {
+	return -code error \
+		"invalid customMatch script; can't evaluate after completion"
+    }
+    set CustomMatch($mode) $script
+}
+
+# tcltest::SubstArguments list
+#
+# This helper function takes in a list of words, then perform a
+# substitution on the list as though each word in the list is a separate
+# argument to the Tcl function.  For example, if this function is
+# invoked as:
+#
+#      SubstArguments {$a {$a}}
+#
+# Then it is as though the function is invoked as:
+#
+#      SubstArguments $a {$a}
+#
+# This code is adapted from Paul Duffin's function "SplitIntoWords".
+# The original function can be found  on:
+#
+#      http://purl.org/thecliff/tcl/wiki/858.html
+#
+# Results:
+#     a list containing the result of the substitution
+#
+# Exceptions:
+#     An error may occur if the list containing unbalanced quote or
+#     unknown variable.
+#
+# Side Effects:
+#     None.
+#
+
+proc tcltest::SubstArguments {argList} {
+
+    # We need to split the argList up into tokens but cannot use list
+    # operations as they throw away some significant quoting, and
+    # [split] ignores braces as it should.  Therefore what we do is
+    # gradually build up a string out of whitespace seperated strings.
+    # We cannot use [split] to split the argList into whitespace
+    # separated strings as it throws away the whitespace which maybe
+    # important so we have to do it all by hand.
+
+    set result {}
+    set token ""
+
+    while {[string length $argList]} {
+        # Look for the next word containing a quote: " { }
+        if {[regexp -indices {[^ \t\n]*[\"\{\}]+[^ \t\n]*} \
+		$argList all]} {
+            # Get the text leading up to this word, but not including
+	    # this word, from the argList.
+            set text [string range $argList 0 \
+		    [expr {[lindex $all 0] - 1}]]
+            # Get the word with the quote
+            set word [string range $argList \
+                    [lindex $all 0] [lindex $all 1]]
+
+            # Remove all text up to and including the word from the
+            # argList.
+            set argList [string range $argList \
+                    [expr {[lindex $all 1] + 1}] end]
+        } else {
+            # Take everything up to the end of the argList.
+            set text $argList
+            set word {}
+            set argList {}
+        }
+
+        if {$token ne {}} {
+            # If we saw a word with quote before, then there is a
+            # multi-word token starting with that word.  In this case,
+            # add the text and the current word to this token.
+            append token $text $word
+        } else {
+            # Add the text to the result.  There is no need to parse
+            # the text because it couldn't be a part of any multi-word
+            # token.  Then start a new multi-word token with the word
+            # because we need to pass this token to the Tcl parser to
+            # check for balancing quotes
+            append result $text
+            set token $word
+        }
+
+        if { [catch {llength $token} length] == 0 && $length == 1} {
+            # The token is a valid list so add it to the result.
+            # lappend result [string trim $token]
+            append result \{$token\}
+            set token {}
+        }
+    }
+
+    # If the last token has not been added to the list then there
+    # is a problem.
+    if { [string length $token] } {
+        error "incomplete token \"$token\""
+    }
+
+    return $result
+}
+
+
+# tcltest::test --
+#
+# This procedure runs a test and prints an error message if the test
+# fails.  If verbose has been set, it also prints a message even if the
+# test succeeds.  The test will be skipped if it doesn't match the
+# match variable, if it matches an element in skip, or if one of the
+# elements of "constraints" turns out not to be true.
+#
+# If testLevel is 1, then this is a top level test, and we record
+# pass/fail information; otherwise, this information is not logged and
+# is not added to running totals.
+#
+# Attributes:
+#   Only description is a required attribute.  All others are optional.
+#   Default values are indicated.
+#
+#   constraints -	A list of one or more keywords, each of which
+#			must be the name of an element in the array
+#			"testConstraints".  If any of these elements is
+#			zero, the test is skipped. This attribute is
+#			optional; default is {}
+#   body -	        Script to run to carry out the test.  It must
+#		        return a result that can be checked for
+#		        correctness.  This attribute is optional;
+#                       default is {}
+#   result -	        Expected result from script.  This attribute is
+#                       optional; default is {}.
+#   output -            Expected output sent to stdout.  This attribute
+#                       is optional; default is {}.
+#   errorOutput -       Expected output sent to stderr.  This attribute
+#                       is optional; default is {}.
+#   returnCodes -       Expected return codes.  This attribute is
+#                       optional; default is {0 2}.
+#   errorCode -         Expected error code.  This attribute is
+#                       optional; default is {*}. It is a glob pattern.
+#                       If given, returnCodes defaults to {1}.
+#   setup -             Code to run before $script (above).  This
+#                       attribute is optional; default is {}.
+#   cleanup -           Code to run after $script (above).  This
+#                       attribute is optional; default is {}.
+#   match -             specifies type of matching to do on result,
+#                       output, errorOutput; this must be a string
+#			previously registered by a call to [customMatch].
+#			The strings exact, glob, and regexp are pre-registered
+#			by the tcltest package.  Default value is exact.
+#
+# Arguments:
+#   name -		Name of test, in the form foo-1.2.
+#   description -	Short textual description of the test, to
+#  		  	help humans understand what it does.
+#
+# Results:
+#	None.
+#
+# Side effects:
+#       Just about anything is possible depending on the test.
+#
+
+proc tcltest::test {name description args} {
+    global tcl_platform
+    variable testLevel
+    variable coreModTime
+    DebugPuts 3 "test $name $args"
+    DebugDo 1 {
+	variable TestNames
+	catch {
+	    puts "test name '$name' re-used; prior use in $TestNames($name)"
+	}
+	set TestNames($name) [info script]
+    }
+
+    FillFilesExisted
+    incr testLevel
+
+    # Pre-define everything to null except output and errorOutput.  We
+    # determine whether or not to trap output based on whether or not
+    # these variables (output & errorOutput) are defined.
+    lassign {} constraints setup cleanup body result returnCodes errorCode match
+
+    # Set the default match mode
+    set match exact
+
+    # Set the default match values for return codes (0 is the standard
+    # expected return value if everything went well; 2 represents
+    # 'return' being used in the test script).
+    set returnCodes [list 0 2]
+
+    # Set the default error code pattern
+    set errorCode "*"
+
+    # The old test format can't have a 3rd argument (constraints or
+    # script) that starts with '-'.
+    if {[string match -* [lindex $args 0]] || ([llength $args] <= 1)} {
+	if {[llength $args] == 1} {
+	    set list [SubstArguments [lindex $args 0]]
+	    foreach {element value} $list {
+		set testAttributes($element) $value
+	    }
+	    foreach item {constraints match setup body cleanup \
+		    result returnCodes errorCode output errorOutput} {
+		if {[info exists testAttributes(-$item)]} {
+		    set testAttributes(-$item) [uplevel 1 \
+			    ::concat $testAttributes(-$item)]
+		}
+	    }
+	} else {
+	    array set testAttributes $args
+	}
+
+	set validFlags {-setup -cleanup -body -result -returnCodes \
+		-errorCode -match -output -errorOutput -constraints}
+
+	foreach flag [array names testAttributes] {
+	    if {$flag ni $validFlags} {
+		incr testLevel -1
+		set sorted [lsort $validFlags]
+		set options [join [lrange $sorted 0 end-1] ", "]
+		append options ", or [lindex $sorted end]"
+		return -code error "bad option \"$flag\": must be $options"
+	    }
+	}
+
+	# store whatever the user gave us
+	foreach item [array names testAttributes] {
+	    set [string trimleft $item "-"] $testAttributes($item)
+	}
+
+	# Check the values supplied for -match
+	variable CustomMatch
+	if {$match ni [array names CustomMatch]} {
+	    incr testLevel -1
+	    set sorted [lsort [array names CustomMatch]]
+	    set values [join [lrange $sorted 0 end-1] ", "]
+	    append values ", or [lindex $sorted end]"
+	    return -code error "bad -match value \"$match\":\
+		    must be $values"
+	}
+
+	# Replace symbolic valies supplied for -returnCodes
+	foreach {strcode numcode} {ok 0 normal 0 error 1 return 2 break 3 continue 4} {
+	    set returnCodes [string map -nocase [list $strcode $numcode] $returnCodes]
+	}
+        # errorCode without returnCode 1 is meaningless
+        if {$errorCode ne "*" && 1 ni $returnCodes} {
+            set returnCodes 1
+        }
+    } else {
+	# This is parsing for the old test command format; it is here
+	# for backward compatibility.
+	set result [lindex $args end]
+	if {[llength $args] == 2} {
+	    set body [lindex $args 0]
+	} elseif {[llength $args] == 3} {
+	    set constraints [lindex $args 0]
+	    set body [lindex $args 1]
+	} else {
+	    incr testLevel -1
+	    return -code error "wrong # args:\
+		    should be \"test name desc ?options?\""
+	}
+    }
+
+    if {[Skipped $name $constraints]} {
+	incr testLevel -1
+	return
+    }
+
+    # Save information about the core file.
+    if {[preserveCore]} {
+	if {[file exists [file join [workingDirectory] core]]} {
+	    set coreModTime [file mtime [file join [workingDirectory] core]]
+	}
+    }
+
+    # First, run the setup script
+    set code [catch {uplevel 1 $setup} setupMsg]
+    if {$code == 1} {
+	set errorInfo(setup) $::errorInfo
+	set errorCodeRes(setup) $::errorCode
+    }
+    set setupFailure [expr {$code != 0}]
+
+    # Only run the test body if the setup was successful
+    if {!$setupFailure} {
+
+	# Register startup time
+	if {[IsVerbose msec] || [IsVerbose usec]} {
+	    set timeStart [clock microseconds]
+	}
+
+	# Verbose notification of $body start
+	if {[IsVerbose start]} {
+	    puts [outputChannel] "---- $name start"
+	    flush [outputChannel]
+	}
+
+	set command [list [namespace origin RunTest] $name $body]
+	if {[info exists output] || [info exists errorOutput]} {
+	    set testResult [uplevel 1 [list [namespace origin Eval] $command 0]]
+	} else {
+	    set testResult [uplevel 1 [list [namespace origin Eval] $command 1]]
+	}
+	lassign $testResult actualAnswer returnCode
+	if {$returnCode == 1} {
+	    set errorInfo(body) $::errorInfo
+	    set errorCodeRes(body) $::errorCode
+	}
+    }
+
+    # check if the return code matched the expected return code
+    set codeFailure 0
+    if {!$setupFailure && ($returnCode ni $returnCodes)} {
+	set codeFailure 1
+    }
+    set errorCodeFailure 0
+    if {!$setupFailure && !$codeFailure && $returnCode == 1 && \
+                ![string match $errorCode $errorCodeRes(body)]} {
+	set errorCodeFailure 1
+    }
+
+    # If expected output/error strings exist, we have to compare
+    # them.  If the comparison fails, then so did the test.
+    set outputFailure 0
+    variable outData
+    if {[info exists output] && !$codeFailure} {
+	if {[set outputCompare [catch {
+	    CompareStrings $outData $output $match
+	} outputMatch]] == 0} {
+	    set outputFailure [expr {!$outputMatch}]
+	} else {
+	    set outputFailure 1
+	}
+    }
+
+    set errorFailure 0
+    variable errData
+    if {[info exists errorOutput] && !$codeFailure} {
+	if {[set errorCompare [catch {
+	    CompareStrings $errData $errorOutput $match
+	} errorMatch]] == 0} {
+	    set errorFailure [expr {!$errorMatch}]
+	} else {
+	    set errorFailure 1
+	}
+    }
+
+    # check if the answer matched the expected answer
+    # Only check if we ran the body of the test (no setup failure)
+    if {$setupFailure || $codeFailure} {
+	set scriptFailure 0
+    } elseif {[set scriptCompare [catch {
+	CompareStrings $actualAnswer $result $match
+    } scriptMatch]] == 0} {
+	set scriptFailure [expr {!$scriptMatch}]
+    } else {
+	set scriptFailure 1
+    }
+
+    # Always run the cleanup script
+    set code [catch {uplevel 1 $cleanup} cleanupMsg]
+    if {$code == 1} {
+	set errorInfo(cleanup) $::errorInfo
+	set errorCodeRes(cleanup) $::errorCode
+    }
+    set cleanupFailure [expr {$code != 0}]
+
+    set coreFailure 0
+    set coreMsg ""
+    # check for a core file first - if one was created by the test,
+    # then the test failed
+    if {[preserveCore]} {
+	if {[file exists [file join [workingDirectory] core]]} {
+	    # There's only a test failure if there is a core file
+	    # and (1) there previously wasn't one or (2) the new
+	    # one is different from the old one.
+	    if {[info exists coreModTime]} {
+		if {$coreModTime != [file mtime \
+			[file join [workingDirectory] core]]} {
+		    set coreFailure 1
+		}
+	    } else {
+		set coreFailure 1
+	    }
+
+	    if {([preserveCore] > 1) && ($coreFailure)} {
+		append coreMsg "\nMoving file to:\
+		    [file join [temporaryDirectory] core-$name]"
+		catch {file rename -force -- \
+		    [file join [workingDirectory] core] \
+		    [file join [temporaryDirectory] core-$name]
+		} msg
+		if {$msg ne {}} {
+		    append coreMsg "\nError:\
+			Problem renaming core file: $msg"
+		}
+	    }
+	}
+    }
+
+    if {[IsVerbose msec] || [IsVerbose usec]} {
+	set t [expr {[clock microseconds] - $timeStart}]
+	if {[IsVerbose usec]} {
+	    puts [outputChannel] "++++ $name took $t μs"
+	}
+	if {[IsVerbose msec]} {
+	    puts [outputChannel] "++++ $name took [expr {round($t/1000.)}] ms"
+	}
+    }
+
+    # if we didn't experience any failures, then we passed
+    variable numTests
+    if {!($setupFailure || $cleanupFailure || $coreFailure
+	    || $outputFailure || $errorFailure || $codeFailure
+	    || $errorCodeFailure || $scriptFailure)} {
+	if {$testLevel == 1} {
+	    incr numTests(Passed)
+	    if {[IsVerbose pass]} {
+		puts [outputChannel] "++++ $name PASSED"
+	    }
+	}
+	incr testLevel -1
+	return
+    }
+
+    # We know the test failed, tally it...
+    if {$testLevel == 1} {
+	incr numTests(Failed)
+    }
+
+    # ... then report according to the type of failure
+    variable currentFailure true
+    if {![IsVerbose body]} {
+	set body ""
+    }
+    puts [outputChannel] "\n"
+    if {[IsVerbose line]} {
+	if {![catch {set testFrame [info frame -1]}] &&
+		[dict get $testFrame type] eq "source"} {
+	    set testFile [dict get $testFrame file]
+	    set testLine [dict get $testFrame line]
+	} else {
+	    set testFile [file normalize [uplevel 1 {info script}]]
+	    if {[file readable $testFile]} {
+		set testFd [open $testFile r]
+		set testLine [expr {[lsearch -regexp \
+			[split [read $testFd] "\n"] \
+			"^\[ \t\]*test [string map {. \\.} $name] "] + 1}]
+		close $testFd
+	    }
+	}
+	if {[info exists testLine]} {
+	    puts [outputChannel] "$testFile:$testLine: error: test failed:\
+		    $name [string trim $description]"
+	}
+    }
+    puts [outputChannel] "==== $name\
+	    [string trim $description] FAILED"
+    if {[string length $body]} {
+	puts [outputChannel] "==== Contents of test case:"
+	puts [outputChannel] $body
+    }
+    if {$setupFailure} {
+	puts [outputChannel] "---- Test setup\
+		failed:\n$setupMsg"
+	if {[info exists errorInfo(setup)]} {
+	    puts [outputChannel] "---- errorInfo(setup): $errorInfo(setup)"
+	    puts [outputChannel] "---- errorCode(setup): $errorCodeRes(setup)"
+	}
+    }
+    if {$scriptFailure} {
+	if {$scriptCompare} {
+	    puts [outputChannel] "---- Error testing result: $scriptMatch"
+	} else {
+	    puts [outputChannel] "---- Result was:\n$actualAnswer"
+	    puts [outputChannel] "---- Result should have been\
+		    ($match matching):\n$result"
+	}
+    }
+    if {$errorCodeFailure} {
+	puts [outputChannel] "---- Error code was: '$errorCodeRes(body)'"
+	puts [outputChannel] "---- Error code should have been: '$errorCode'"
+    }
+    if {$codeFailure} {
+	switch -- $returnCode {
+	    0 { set msg "Test completed normally" }
+	    1 { set msg "Test generated error" }
+	    2 { set msg "Test generated return exception" }
+	    3 { set msg "Test generated break exception" }
+	    4 { set msg "Test generated continue exception" }
+	    default { set msg "Test generated exception" }
+	}
+	puts [outputChannel] "---- $msg; Return code was: $returnCode"
+	puts [outputChannel] "---- Return code should have been\
+		one of: $returnCodes"
+	if {[IsVerbose error]} {
+	    if {[info exists errorInfo(body)] && (1 ni $returnCodes)} {
+		puts [outputChannel] "---- errorInfo: $errorInfo(body)"
+		puts [outputChannel] "---- errorCode: $errorCodeRes(body)"
+	    }
+	}
+    }
+    if {$outputFailure} {
+	if {$outputCompare} {
+	    puts [outputChannel] "---- Error testing output: $outputMatch"
+	} else {
+	    puts [outputChannel] "---- Output was:\n$outData"
+	    puts [outputChannel] "---- Output should have been\
+		    ($match matching):\n$output"
+	}
+    }
+    if {$errorFailure} {
+	if {$errorCompare} {
+	    puts [outputChannel] "---- Error testing errorOutput: $errorMatch"
+	} else {
+	    puts [outputChannel] "---- Error output was:\n$errData"
+	    puts [outputChannel] "---- Error output should have\
+		    been ($match matching):\n$errorOutput"
+	}
+    }
+    if {$cleanupFailure} {
+	puts [outputChannel] "---- Test cleanup failed:\n$cleanupMsg"
+	if {[info exists errorInfo(cleanup)]} {
+	    puts [outputChannel] "---- errorInfo(cleanup): $errorInfo(cleanup)"
+	    puts [outputChannel] "---- errorCode(cleanup): $errorCodeRes(cleanup)"
+	}
+    }
+    if {$coreFailure} {
+	puts [outputChannel] "---- Core file produced while running\
+		test!  $coreMsg"
+    }
+    puts [outputChannel] "==== $name FAILED\n"
+
+    incr testLevel -1
+    return
+}
+
+# Skipped --
+#
+# Given a test name and it constraints, returns a boolean indicating
+# whether the current configuration says the test should be skipped.
+#
+# Side Effects:  Maintains tally of total tests seen and tests skipped.
+#
+proc tcltest::Skipped {name constraints} {
+    variable testLevel
+    variable numTests
+    variable testConstraints
+
+    if {$testLevel == 1} {
+	incr numTests(Total)
+    }
+    # skip the test if it's name matches an element of skip
+    foreach pattern [skip] {
+	if {[string match $pattern $name]} {
+	    if {$testLevel == 1} {
+		incr numTests(Skipped)
+		DebugDo 1 {AddToSkippedBecause userSpecifiedSkip}
+	    }
+	    return 1
+	}
+    }
+    # skip the test if it's name doesn't match any element of match
+    set ok 0
+    foreach pattern [match] {
+	if {[string match $pattern $name]} {
+	    set ok 1
+	    break
+	}
+    }
+    if {!$ok} {
+	if {$testLevel == 1} {
+	    incr numTests(Skipped)
+	    DebugDo 1 {AddToSkippedBecause userSpecifiedNonMatch}
+	}
+	return 1
+    }
+    if {$constraints eq {}} {
+	# If we're limited to the listed constraints and there aren't
+	# any listed, then we shouldn't run the test.
+	if {[limitConstraints]} {
+	    AddToSkippedBecause userSpecifiedLimitConstraint
+	    if {$testLevel == 1} {
+		incr numTests(Skipped)
+	    }
+	    return 1
+	}
+    } else {
+	# "constraints" argument exists;
+	# make sure that the constraints are satisfied.
+
+	set doTest 0
+	if {[string match {*[$\[]*} $constraints] != 0} {
+	    # full expression, e.g. {$foo > [info tclversion]}
+	    catch {set doTest [uplevel #0 [list expr $constraints]]}
+	} elseif {[regexp {[^.:_a-zA-Z0-9 \n\r\t]+} $constraints] != 0} {
+	    # something like {a || b} should be turned into
+	    # $testConstraints(a) || $testConstraints(b).
+	    regsub -all {[.\w]+} $constraints {$testConstraints(&)} c
+	    catch {set doTest [eval [list expr $c]]}
+	} elseif {![catch {llength $constraints}]} {
+	    # just simple constraints such as {unixOnly fonts}.
+	    set doTest 1
+	    foreach constraint $constraints {
+		if {(![info exists testConstraints($constraint)]) \
+			|| (!$testConstraints($constraint))} {
+		    set doTest 0
+
+		    # store the constraint that kept the test from
+		    # running
+		    set constraints $constraint
+		    break
+		}
+	    }
+	}
+
+	if {!$doTest} {
+	    if {[IsVerbose skip]} {
+		puts [outputChannel] "++++ $name SKIPPED: $constraints"
+	    }
+
+	    if {$testLevel == 1} {
+		incr numTests(Skipped)
+		AddToSkippedBecause $constraints
+	    }
+	    return 1
+	}
+    }
+    return 0
+}
+
+# RunTest --
+#
+# This is where the body of a test is evaluated.  The combination of
+# [RunTest] and [Eval] allows the output and error output of the test
+# body to be captured for comparison against the expected values.
+
+proc tcltest::RunTest {name script} {
+    DebugPuts 3 "Running $name {$script}"
+
+    # If there is no "memory" command (because memory debugging isn't
+    # enabled), then don't attempt to use the command.
+
+    if {[llength [info commands memory]] == 1} {
+	memory tag $name
+    }
+
+    set code [catch {uplevel 1 $script} actualAnswer]
+
+    return [list $actualAnswer $code]
+}
+
+#####################################################################
+
+# tcltest::cleanupTestsHook --
+#
+#	This hook allows a harness that builds upon tcltest to specify
+#       additional things that should be done at cleanup.
+#
+
+if {[llength [info commands tcltest::cleanupTestsHook]] == 0} {
+    proc tcltest::cleanupTestsHook {} {}
+}
+
+# tcltest::cleanupTests --
+#
+# Remove files and dirs created using the makeFile and makeDirectory
+# commands since the last time this proc was invoked.
+#
+# Print the names of the files created without the makeFile command
+# since the tests were invoked.
+#
+# Print the number tests (total, passed, failed, and skipped) since the
+# tests were invoked.
+#
+# Restore original environment (as reported by special variable env).
+#
+# Arguments:
+#      calledFromAllFile - if 0, behave as if we are running a single
+#      test file within an entire suite of tests.  if we aren't running
+#      a single test file, then don't report status.  check for new
+#      files created during the test run and report on them.  if 1,
+#      report collated status from all the test file runs.
+#
+# Results:
+#      None.
+#
+# Side Effects:
+#      None
+#
+
+proc tcltest::cleanupTests {{calledFromAllFile 0}} {
+    variable filesMade
+    variable filesExisted
+    variable createdNewFiles
+    variable testSingleFile
+    variable numTests
+    variable numTestFiles
+    variable failFiles
+    variable skippedBecause
+    variable currentFailure
+    variable originalEnv
+    variable originalTclPlatform
+    variable coreModTime
+
+    FillFilesExisted
+    set testFileName [file tail [info script]]
+
+    # Hook to handle reporting to a parent interpreter
+    if {[llength [info commands [namespace current]::ReportToMaster]]} {
+	ReportToMaster $numTests(Total) $numTests(Passed) $numTests(Skipped) \
+	    $numTests(Failed) [array get skippedBecause] \
+	    [array get createdNewFiles]
+	set testSingleFile false
+    }
+
+    # Call the cleanup hook
+    cleanupTestsHook
+
+    # Remove files and directories created by the makeFile and
+    # makeDirectory procedures.  Record the names of files in
+    # workingDirectory that were not pre-existing, and associate them
+    # with the test file that created them.
+
+    if {!$calledFromAllFile} {
+	foreach file $filesMade {
+	    if {[file exists $file]} {
+		DebugDo 1 {Warn "cleanupTests deleting $file..."}
+		catch {file delete -force -- $file}
+	    }
+	}
+	set currentFiles {}
+	foreach file [glob -nocomplain \
+		-directory [temporaryDirectory] *] {
+	    lappend currentFiles [file tail $file]
+	}
+	set newFiles {}
+	foreach file $currentFiles {
+	    if {$file ni $filesExisted} {
+		lappend newFiles $file
+	    }
+	}
+	set filesExisted $currentFiles
+	if {[llength $newFiles] > 0} {
+	    set createdNewFiles($testFileName) $newFiles
+	}
+    }
+
+    if {$calledFromAllFile || $testSingleFile} {
+
+	# print stats
+
+	puts -nonewline [outputChannel] "$testFileName:"
+	foreach index [list "Total" "Passed" "Skipped" "Failed"] {
+	    puts -nonewline [outputChannel] \
+		    "\t$index\t$numTests($index)"
+	}
+	puts [outputChannel] ""
+
+	# print number test files sourced
+	# print names of files that ran tests which failed
+
+	if {$calledFromAllFile} {
+	    puts [outputChannel] \
+		    "Sourced $numTestFiles Test Files."
+	    set numTestFiles 0
+	    if {[llength $failFiles] > 0} {
+		puts [outputChannel] \
+			"Files with failing tests: $failFiles"
+		set failFiles {}
+	    }
+	}
+
+	# if any tests were skipped, print the constraints that kept
+	# them from running.
+
+	set constraintList [array names skippedBecause]
+	if {[llength $constraintList] > 0} {
+	    puts [outputChannel] \
+		    "Number of tests skipped for each constraint:"
+	    foreach constraint [lsort $constraintList] {
+		puts [outputChannel] \
+			"\t$skippedBecause($constraint)\t$constraint"
+		unset skippedBecause($constraint)
+	    }
+	}
+
+	# report the names of test files in createdNewFiles, and reset
+	# the array to be empty.
+
+	set testFilesThatTurded [lsort [array names createdNewFiles]]
+	if {[llength $testFilesThatTurded] > 0} {
+	    puts [outputChannel] "Warning: files left behind:"
+	    foreach testFile $testFilesThatTurded {
+		puts [outputChannel] \
+			"\t$testFile:\t$createdNewFiles($testFile)"
+		unset createdNewFiles($testFile)
+	    }
+	}
+
+	# reset filesMade, filesExisted, and numTests
+
+	set filesMade {}
+	foreach index [list "Total" "Passed" "Skipped" "Failed"] {
+	    set numTests($index) 0
+	}
+
+	# exit only if running Tk in non-interactive mode
+	# This should be changed to determine if an event
+	# loop is running, which is the real issue.
+	# Actually, this doesn't belong here at all.  A package
+	# really has no business [exit]-ing an application.
+	if {![catch {package present Tk}] && ![testConstraint interactive]} {
+	    exit
+	}
+    } else {
+
+	# if we're deferring stat-reporting until all files are sourced,
+	# then add current file to failFile list if any tests in this
+	# file failed
+
+	if {$currentFailure && ($testFileName ni $failFiles)} {
+	    lappend failFiles $testFileName
+	}
+	set currentFailure false
+
+	# restore the environment to the state it was in before this package
+	# was loaded
+
+	set newEnv {}
+	set changedEnv {}
+	set removedEnv {}
+	foreach index [array names ::env] {
+	    if {![info exists originalEnv($index)]} {
+		lappend newEnv $index
+		unset ::env($index)
+	    }
+	}
+	foreach index [array names originalEnv] {
+	    if {![info exists ::env($index)]} {
+		lappend removedEnv $index
+		set ::env($index) $originalEnv($index)
+	    } elseif {$::env($index) ne $originalEnv($index)} {
+		lappend changedEnv $index
+		set ::env($index) $originalEnv($index)
+	    }
+	}
+	if {[llength $newEnv] > 0} {
+	    puts [outputChannel] \
+		    "env array elements created:\t$newEnv"
+	}
+	if {[llength $changedEnv] > 0} {
+	    puts [outputChannel] \
+		    "env array elements changed:\t$changedEnv"
+	}
+	if {[llength $removedEnv] > 0} {
+	    puts [outputChannel] \
+		    "env array elements removed:\t$removedEnv"
+	}
+
+	set changedTclPlatform {}
+	foreach index [array names originalTclPlatform] {
+	    if {$::tcl_platform($index) \
+		    != $originalTclPlatform($index)} {
+		lappend changedTclPlatform $index
+		set ::tcl_platform($index) $originalTclPlatform($index)
+	    }
+	}
+	if {[llength $changedTclPlatform] > 0} {
+	    puts [outputChannel] "tcl_platform array elements\
+		    changed:\t$changedTclPlatform"
+	}
+
+	if {[file exists [file join [workingDirectory] core]]} {
+	    if {[preserveCore] > 1} {
+		puts "rename core file (> 1)"
+		puts [outputChannel] "produced core file! \
+			Moving file to: \
+			[file join [temporaryDirectory] core-$testFileName]"
+		catch {file rename -force -- \
+			[file join [workingDirectory] core] \
+			[file join [temporaryDirectory] core-$testFileName]
+		} msg
+		if {$msg ne {}} {
+		    PrintError "Problem renaming file: $msg"
+		}
+	    } else {
+		# Print a message if there is a core file and (1) there
+		# previously wasn't one or (2) the new one is different
+		# from the old one.
+
+		if {[info exists coreModTime]} {
+		    if {$coreModTime != [file mtime \
+			    [file join [workingDirectory] core]]} {
+			puts [outputChannel] "A core file was created!"
+		    }
+		} else {
+		    puts [outputChannel] "A core file was created!"
+		}
+	    }
+	}
+    }
+    flush [outputChannel]
+    flush [errorChannel]
+    return
+}
+
+#####################################################################
+
+# Procs that determine which tests/test files to run
+
+# tcltest::GetMatchingFiles
+#
+#       Looks at the patterns given to match and skip files and uses
+#	them to put together a list of the tests that will be run.
+#
+# Arguments:
+#       directory to search
+#
+# Results:
+#       The constructed list is returned to the user.  This will
+#	primarily be used in 'all.tcl' files.  It is used in
+#	runAllTests.
+#
+# Side Effects:
+#       None
+
+# a lower case version is needed for compatibility with tcltest 1.0
+proc tcltest::getMatchingFiles args {GetMatchingFiles {*}$args}
+
+proc tcltest::GetMatchingFiles { args } {
+    if {[llength $args]} {
+	set dirList $args
+    } else {
+	# Finding tests only in [testsDirectory] is normal operation.
+	# This procedure is written to accept multiple directory arguments
+	# only to satisfy version 1 compatibility.
+	set dirList [list [testsDirectory]]
+    }
+
+    set matchingFiles [list]
+    foreach directory $dirList {
+
+	# List files in $directory that match patterns to run.
+	set matchFileList [list]
+	foreach match [matchFiles] {
+	    set matchFileList [concat $matchFileList \
+		    [glob -directory $directory -types {b c f p s} \
+		    -nocomplain -- $match]]
+	}
+
+	# List files in $directory that match patterns to skip.
+	set skipFileList [list]
+	foreach skip [skipFiles] {
+	    set skipFileList [concat $skipFileList \
+		    [glob -directory $directory -types {b c f p s} \
+		    -nocomplain -- $skip]]
+	}
+
+	# Add to result list all files in match list and not in skip list
+	foreach file $matchFileList {
+	    if {$file ni $skipFileList} {
+		lappend matchingFiles $file
+	    }
+	}
+    }
+
+    if {[llength $matchingFiles] == 0} {
+	PrintError "No test files remain after applying your match and\
+		skip patterns!"
+    }
+    return $matchingFiles
+}
+
+# tcltest::GetMatchingDirectories --
+#
+#	Looks at the patterns given to match and skip directories and
+#	uses them to put together a list of the test directories that we
+#	should attempt to run.  (Only subdirectories containing an
+#	"all.tcl" file are put into the list.)
+#
+# Arguments:
+#	root directory from which to search
+#
+# Results:
+#	The constructed list is returned to the user.  This is used in
+#	the primary all.tcl file.
+#
+# Side Effects:
+#       None.
+
+proc tcltest::GetMatchingDirectories {rootdir} {
+
+    # Determine the skip list first, to avoid [glob]-ing over subdirectories
+    # we're going to throw away anyway.  Be sure we skip the $rootdir if it
+    # comes up to avoid infinite loops.
+    set skipDirs [list $rootdir]
+    foreach pattern [skipDirectories] {
+	set skipDirs [concat $skipDirs [glob -directory $rootdir -types d \
+		-nocomplain -- $pattern]]
+    }
+
+    # Now step through the matching directories, prune out the skipped ones
+    # as you go.
+    set matchDirs [list]
+    foreach pattern [matchDirectories] {
+	foreach path [glob -directory $rootdir -types d -nocomplain -- \
+		$pattern] {
+	    if {$path ni $skipDirs} {
+		set matchDirs [concat $matchDirs [GetMatchingDirectories $path]]
+		if {[file exists [file join $path all.tcl]]} {
+		    lappend matchDirs $path
+		}
+	    }
+	}
+    }
+
+    if {[llength $matchDirs] == 0} {
+	DebugPuts 1 "No test directories remain after applying match\
+		and skip patterns!"
+    }
+    return [lsort $matchDirs]
+}
+
+# tcltest::runAllTests --
+#
+#	prints output and sources test files according to the match and
+#	skip patterns provided.  after sourcing test files, it goes on
+#	to source all.tcl files in matching test subdirectories.
+#
+# Arguments:
+#	shell being tested
+#
+# Results:
+#	Whether there were any failures.
+#
+# Side effects:
+#	None.
+
+proc tcltest::runAllTests { {shell ""} } {
+    variable testSingleFile
+    variable numTestFiles
+    variable numTests
+    variable failFiles
+    variable DefaultValue
+    set failFilesAccum {}
+
+    FillFilesExisted
+    if {[llength [info level 0]] == 1} {
+	set shell [interpreter]
+    }
+
+    set testSingleFile false
+
+    puts [outputChannel] "Tests running in interp:  $shell"
+    puts [outputChannel] "Tests located in:  [testsDirectory]"
+    puts [outputChannel] "Tests running in:  [workingDirectory]"
+    puts [outputChannel] "Temporary files stored in\
+	    [temporaryDirectory]"
+
+    # [file system] first available in Tcl 8.4
+    if {![catch {file system [testsDirectory]} result]
+	    && ([lindex $result 0] ne "native")} {
+	# If we aren't running in the native filesystem, then we must
+	# run the tests in a single process (via 'source'), because
+	# trying to run then via a pipe will fail since the files don't
+	# really exist.
+	singleProcess 1
+    }
+
+    if {[singleProcess]} {
+	puts [outputChannel] \
+		"Test files sourced into current interpreter"
+    } else {
+	puts [outputChannel] \
+		"Test files run in separate interpreters"
+    }
+    if {[llength [skip]] > 0} {
+	puts [outputChannel] "Skipping tests that match:  [skip]"
+    }
+    puts [outputChannel] "Running tests that match:  [match]"
+
+    if {[llength [skipFiles]] > 0} {
+	puts [outputChannel] \
+		"Skipping test files that match:  [skipFiles]"
+    }
+    if {[llength [matchFiles]] > 0} {
+	puts [outputChannel] \
+		"Only running test files that match:  [matchFiles]"
+    }
+
+    set timeCmd {clock format [clock seconds]}
+    puts [outputChannel] "Tests began at [eval $timeCmd]"
+
+    # Run each of the specified tests
+    foreach file [lsort [GetMatchingFiles]] {
+	set tail [file tail $file]
+	puts [outputChannel] $tail
+	flush [outputChannel]
+
+	if {[singleProcess]} {
+	    incr numTestFiles
+	    uplevel 1 [list ::source $file]
+	} else {
+	    # Pass along our configuration to the child processes.
+	    # EXCEPT for the -outfile, because the parent process
+	    # needs to read and process output of children.
+	    set childargv [list]
+	    foreach opt [Configure] {
+		if {$opt eq "-outfile"} {continue}
+		set value [Configure $opt]
+		# Don't bother passing default configuration options
+		if {$value eq $DefaultValue($opt)} {
+			continue
+		}
+		lappend childargv $opt $value
+	    }
+	    set cmd [linsert $childargv 0 | $shell $file]
+	    if {[catch {
+		incr numTestFiles
+		set pipeFd [open $cmd "r"]
+		while {[gets $pipeFd line] >= 0} {
+		    if {[regexp [join {
+			    {^([^:]+):\t}
+			    {Total\t([0-9]+)\t}
+			    {Passed\t([0-9]+)\t}
+			    {Skipped\t([0-9]+)\t}
+			    {Failed\t([0-9]+)}
+			    } ""] $line null testFile \
+			    Total Passed Skipped Failed]} {
+			foreach index {Total Passed Skipped Failed} {
+			    incr numTests($index) [set $index]
+			}
+			if {$Failed > 0} {
+			    lappend failFiles $testFile
+			    lappend failFilesAccum $testFile
+			}
+		    } elseif {[regexp [join {
+			    {^Number of tests skipped }
+			    {for each constraint:}
+			    {|^\t(\d+)\t(.+)$}
+			    } ""] $line match skipped constraint]} {
+			if {[string match \t* $match]} {
+			    AddToSkippedBecause $constraint $skipped
+			}
+		    } else {
+			puts [outputChannel] $line
+		    }
+		}
+		close $pipeFd
+	    } msg]} {
+		puts [outputChannel] "Test file error: $msg"
+		# append the name of the test to a list to be reported
+		# later
+		lappend testFileFailures $file
+	    }
+	}
+    }
+
+    # cleanup
+    puts [outputChannel] "\nTests ended at [eval $timeCmd]"
+    cleanupTests 1
+    if {[info exists testFileFailures]} {
+	puts [outputChannel] "\nTest files exiting with errors:  \n"
+	foreach file $testFileFailures {
+	    puts [outputChannel] "  [file tail $file]\n"
+	}
+    }
+
+    # Checking for subdirectories in which to run tests
+    foreach directory [GetMatchingDirectories [testsDirectory]] {
+	set dir [file tail $directory]
+	puts [outputChannel] [string repeat ~ 44]
+	puts [outputChannel] "$dir test began at [eval $timeCmd]\n"
+
+	uplevel 1 [list ::source [file join $directory all.tcl]]
+
+	set endTime [eval $timeCmd]
+	puts [outputChannel] "\n$dir test ended at $endTime"
+	puts [outputChannel] ""
+	puts [outputChannel] [string repeat ~ 44]
+    }
+    return [expr {[info exists testFileFailures] || [llength $failFilesAccum]}]
+}
+
+#####################################################################
+
+# Test utility procs - not used in tcltest, but may be useful for
+# testing.
+
+# tcltest::loadTestedCommands --
+#
+#     Uses the specified script to load the commands to test. Allowed to
+#     be empty, as the tested commands could have been compiled into the
+#     interpreter.
+#
+# Arguments
+#     none
+#
+# Results
+#     none
+#
+# Side Effects:
+#     none.
+
+proc tcltest::loadTestedCommands {} {
+    return [uplevel 1 [loadScript]]
+}
+
+# tcltest::saveState --
+#
+#	Save information regarding what procs and variables exist.
+#
+# Arguments:
+#	none
+#
+# Results:
+#	Modifies the variable saveState
+#
+# Side effects:
+#	None.
+
+proc tcltest::saveState {} {
+    variable saveState
+    uplevel 1 [list ::set [namespace which -variable saveState]] \
+	    {[::list [::info procs] [::info vars]]}
+    DebugPuts  2 "[lindex [info level 0] 0]: $saveState"
+    return
+}
+
+# tcltest::restoreState --
+#
+#	Remove procs and variables that didn't exist before the call to
+#       [saveState].
+#
+# Arguments:
+#	none
+#
+# Results:
+#	Removes procs and variables from your environment if they don't
+#	exist in the saveState variable.
+#
+# Side effects:
+#	None.
+
+proc tcltest::restoreState {} {
+    variable saveState
+    foreach p [uplevel 1 {::info procs}] {
+	if {($p ni [lindex $saveState 0]) && ("[namespace current]::$p" ne
+		[uplevel 1 [list ::namespace origin $p]])} {
+
+	    DebugPuts 2 "[lindex [info level 0] 0]: Removing proc $p"
+	    uplevel 1 [list ::catch [list ::rename $p {}]]
+	}
+    }
+    foreach p [uplevel 1 {::info vars}] {
+	if {$p ni [lindex $saveState 1]} {
+	    DebugPuts 2 "[lindex [info level 0] 0]:\
+		    Removing variable $p"
+	    uplevel 1 [list ::catch [list ::unset $p]]
+	}
+    }
+    return
+}
+
+# tcltest::normalizeMsg --
+#
+#	Removes "extra" newlines from a string.
+#
+# Arguments:
+#	msg        String to be modified
+#
+# Results:
+#	string with extra newlines removed
+#
+# Side effects:
+#	None.
+
+proc tcltest::normalizeMsg {msg} {
+    regsub "\n$" [string tolower $msg] "" msg
+    set msg [string map [list "\n\n" "\n"] $msg]
+    return [string map [list "\n\}" "\}"] $msg]
+}
+
+# tcltest::makeFile --
+#
+# Create a new file with the name <name>, and write <contents> to it.
+#
+# If this file hasn't been created via makeFile since the last time
+# cleanupTests was called, add it to the $filesMade list, so it will be
+# removed by the next call to cleanupTests.
+#
+# Arguments:
+#	contents        content of the new file
+#       name            name of the new file
+#       directory       directory name for new file
+#
+# Results:
+#	absolute path to the file created
+#
+# Side effects:
+#	None.
+
+proc tcltest::makeFile {contents name {directory ""}} {
+    variable filesMade
+    FillFilesExisted
+
+    if {[llength [info level 0]] == 3} {
+	set directory [temporaryDirectory]
+    }
+
+    set fullName [file join $directory $name]
+
+    DebugPuts 3 "[lindex [info level 0] 0]:\
+	     putting ``$contents'' into $fullName"
+
+    set fd [open $fullName w]
+    chan configure $fd -translation lf
+    if {[string index $contents end] eq "\n"} {
+	puts -nonewline $fd $contents
+    } else {
+	puts $fd $contents
+    }
+    close $fd
+
+    if {$fullName ni $filesMade} {
+	lappend filesMade $fullName
+    }
+    return $fullName
+}
+
+# tcltest::removeFile --
+#
+#	Removes the named file from the filesystem
+#
+# Arguments:
+#	name          file to be removed
+#       directory     directory from which to remove file
+#
+# Results:
+#	return value from [file delete]
+#
+# Side effects:
+#	None.
+
+proc tcltest::removeFile {name {directory ""}} {
+    variable filesMade
+    FillFilesExisted
+    if {[llength [info level 0]] == 2} {
+	set directory [temporaryDirectory]
+    }
+    set fullName [file join $directory $name]
+    DebugPuts 3 "[lindex [info level 0] 0]: removing $fullName"
+    set idx [lsearch -exact $filesMade $fullName]
+    set filesMade [lreplace $filesMade $idx $idx]
+    if {$idx == -1} {
+	DebugDo 1 {
+	    Warn "removeFile removing \"$fullName\":\n  not created by makeFile"
+	}
+    }
+    if {![file isfile $fullName]} {
+	DebugDo 1 {
+	    Warn "removeFile removing \"$fullName\":\n  not a file"
+	}
+    }
+    return [file delete -- $fullName]
+}
+
+# tcltest::makeDirectory --
+#
+# Create a new dir with the name <name>.
+#
+# If this dir hasn't been created via makeDirectory since the last time
+# cleanupTests was called, add it to the $directoriesMade list, so it
+# will be removed by the next call to cleanupTests.
+#
+# Arguments:
+#       name            name of the new directory
+#       directory       directory in which to create new dir
+#
+# Results:
+#	absolute path to the directory created
+#
+# Side effects:
+#	None.
+
+proc tcltest::makeDirectory {name {directory ""}} {
+    variable filesMade
+    FillFilesExisted
+    if {[llength [info level 0]] == 2} {
+	set directory [temporaryDirectory]
+    }
+    set fullName [file join $directory $name]
+    DebugPuts 3 "[lindex [info level 0] 0]: creating $fullName"
+    file mkdir $fullName
+    if {$fullName ni $filesMade} {
+	lappend filesMade $fullName
+    }
+    return $fullName
+}
+
+# tcltest::removeDirectory --
+#
+#	Removes a named directory from the file system.
+#
+# Arguments:
+#	name          Name of the directory to remove
+#       directory     Directory from which to remove
+#
+# Results:
+#	return value from [file delete]
+#
+# Side effects:
+#	None
+
+proc tcltest::removeDirectory {name {directory ""}} {
+    variable filesMade
+    FillFilesExisted
+    if {[llength [info level 0]] == 2} {
+	set directory [temporaryDirectory]
+    }
+    set fullName [file join $directory $name]
+    DebugPuts 3 "[lindex [info level 0] 0]: deleting $fullName"
+    set idx [lsearch -exact $filesMade $fullName]
+    set filesMade [lreplace $filesMade $idx $idx]
+    if {$idx == -1} {
+	DebugDo 1 {
+	    Warn "removeDirectory removing \"$fullName\":\n  not created\
+		    by makeDirectory"
+	}
+    }
+    if {![file isdirectory $fullName]} {
+	DebugDo 1 {
+	    Warn "removeDirectory removing \"$fullName\":\n  not a directory"
+	}
+    }
+    return [file delete -force -- $fullName]
+}
+
+# tcltest::viewFile --
+#
+#	reads the content of a file and returns it
+#
+# Arguments:
+#	name of the file to read
+#       directory in which file is located
+#
+# Results:
+#	content of the named file
+#
+# Side effects:
+#	None.
+
+proc tcltest::viewFile {name {directory ""}} {
+    FillFilesExisted
+    if {[llength [info level 0]] == 2} {
+	set directory [temporaryDirectory]
+    }
+    set fullName [file join $directory $name]
+    set f [open $fullName]
+    set data [read -nonewline $f]
+    close $f
+    return $data
+}
+
+# tcltest::bytestring --
+#
+# Construct a string that consists of the requested sequence of bytes,
+# as opposed to a string of properly formed UTF-8 characters.
+# This allows the tester to
+# 1. Create denormalized or improperly formed strings to pass to C
+#    procedures that are supposed to accept strings with embedded NULL
+#    bytes.
+# 2. Confirm that a string result has a certain pattern of bytes, for
+#    instance to confirm that "\xe0\0" in a Tcl script is stored
+#    internally in UTF-8 as the sequence of bytes "\xc3\xa0\xc0\x80".
+#
+# Generally, it's a bad idea to examine the bytes in a Tcl string or to
+# construct improperly formed strings in this manner, because it involves
+# exposing that Tcl uses UTF-8 internally.
+#
+# Arguments:
+#	string being converted
+#
+# Results:
+#	result fom encoding
+#
+# Side effects:
+#	None
+
+proc tcltest::bytestring {string} {
+    return [encoding convertfrom identity $string]
+}
+
+# tcltest::OpenFiles --
+#
+#	used in io tests, uses testchannel
+#
+# Arguments:
+#	None.
+#
+# Results:
+#	???
+#
+# Side effects:
+#	None.
+
+proc tcltest::OpenFiles {} {
+    if {[catch {testchannel open} result]} {
+	return {}
+    }
+    return $result
+}
+
+# tcltest::LeakFiles --
+#
+#	used in io tests, uses testchannel
+#
+# Arguments:
+#	None.
+#
+# Results:
+#	???
+#
+# Side effects:
+#	None.
+
+proc tcltest::LeakFiles {old} {
+    if {[catch {testchannel open} new]} {
+	return {}
+    }
+    set leak {}
+    foreach p $new {
+	if {$p ni $old} {
+	    lappend leak $p
+	}
+    }
+    return $leak
+}
+
+#
+# Internationalization / ISO support procs     -- dl
+#
+
+# tcltest::SetIso8859_1_Locale --
+#
+#	used in cmdIL.test, uses testlocale
+#
+# Arguments:
+#	None.
+#
+# Results:
+#	None.
+#
+# Side effects:
+#	None.
+
+proc tcltest::SetIso8859_1_Locale {} {
+    variable previousLocale
+    variable isoLocale
+    if {[info commands testlocale] != ""} {
+	set previousLocale [testlocale ctype]
+	testlocale ctype $isoLocale
+    }
+    return
+}
+
+# tcltest::RestoreLocale --
+#
+#	used in cmdIL.test, uses testlocale
+#
+# Arguments:
+#	None.
+#
+# Results:
+#	None.
+#
+# Side effects:
+#	None.
+
+proc tcltest::RestoreLocale {} {
+    variable previousLocale
+    if {[info commands testlocale] != ""} {
+	testlocale ctype $previousLocale
+    }
+    return
+}
+
+# tcltest::threadReap --
+#
+#	Kill all threads except for the main thread.
+#	Do nothing if testthread is not defined.
+#
+# Arguments:
+#	none.
+#
+# Results:
+#	Returns the number of existing threads.
+#
+# Side Effects:
+#       none.
+#
+
+proc tcltest::threadReap {} {
+    if {[info commands testthread] ne {}} {
+
+	# testthread built into tcltest
+
+	testthread errorproc ThreadNullError
+	while {[llength [testthread names]] > 1} {
+	    foreach tid [testthread names] {
+		if {$tid != [mainThread]} {
+		    catch {
+			testthread send -async $tid {testthread exit}
+		    }
+		}
+	    }
+	    ## Enter a bit a sleep to give the threads enough breathing
+	    ## room to kill themselves off, otherwise the end up with a
+	    ## massive queue of repeated events
+	    after 1
+	}
+	testthread errorproc ThreadError
+	return [llength [testthread names]]
+    } elseif {[info commands thread::id] ne {}} {
+
+	# Thread extension
+
+	thread::errorproc ThreadNullError
+	while {[llength [thread::names]] > 1} {
+	    foreach tid [thread::names] {
+		if {$tid != [mainThread]} {
+		    catch {thread::send -async $tid {thread::exit}}
+		}
+	    }
+	    ## Enter a bit a sleep to give the threads enough breathing
+	    ## room to kill themselves off, otherwise the end up with a
+	    ## massive queue of repeated events
+	    after 1
+	}
+	thread::errorproc ThreadError
+	return [llength [thread::names]]
+    } else {
+	return 1
+    }
+    return 0
+}
+
+# Initialize the constraints and set up command line arguments
+namespace eval tcltest {
+    # Define initializers for all the built-in contraint definitions
+    DefineConstraintInitializers
+
+    # Set up the constraints in the testConstraints array to be lazily
+    # initialized by a registered initializer, or by "false" if no
+    # initializer is registered.
+    trace add variable testConstraints read [namespace code SafeFetch]
+
+    # Only initialize constraints at package load time if an
+    # [initConstraintsHook] has been pre-defined.  This is only
+    # for compatibility support.  The modern way to add a custom
+    # test constraint is to just call the [testConstraint] command
+    # straight away, without all this "hook" nonsense.
+    if {[namespace current] eq
+	    [namespace qualifiers [namespace which initConstraintsHook]]} {
+	InitConstraints
+    } else {
+	proc initConstraintsHook {} {}
+    }
+
+    # Define the standard match commands
+    customMatch exact	[list string equal]
+    customMatch glob	[list string match]
+    customMatch regexp	[list regexp --]
+
+    # If the TCLTEST_OPTIONS environment variable exists, configure
+    # tcltest according to the option values it specifies.  This has
+    # the effect of resetting tcltest's default configuration.
+    proc ConfigureFromEnvironment {} {
+	upvar #0 env(TCLTEST_OPTIONS) options
+	if {[catch {llength $options} msg]} {
+	    Warn "invalid TCLTEST_OPTIONS \"$options\":\n  invalid\
+		    Tcl list: $msg"
+	    return
+	}
+	if {[llength $options] % 2} {
+	    Warn "invalid TCLTEST_OPTIONS: \"$options\":\n  should be\
+		    -option value ?-option value ...?"
+	    return
+	}
+	if {[catch {Configure {*}$options} msg]} {
+	    Warn "invalid TCLTEST_OPTIONS: \"$options\":\n  $msg"
+	    return
+	}
+    }
+    if {[info exists ::env(TCLTEST_OPTIONS)]} {
+	ConfigureFromEnvironment
+    }
+
+    proc LoadTimeCmdLineArgParsingRequired {} {
+	set required false
+	if {[info exists ::argv] && ("-help" in $::argv)} {
+	    # The command line asks for -help, so give it (and exit)
+	    # right now.  ([configure] does not process -help)
+	    set required true
+	}
+	foreach hook { PrintUsageInfoHook processCmdLineArgsHook
+			processCmdLineArgsAddFlagsHook } {
+	    if {[namespace current] eq
+		    [namespace qualifiers [namespace which $hook]]} {
+		set required true
+	    } else {
+		proc $hook args {}
+	    }
+	}
+	return $required
+    }
+
+    # Only initialize configurable options from the command line arguments
+    # at package load time if necessary for backward compatibility.  This
+    # lets the tcltest user call [configure] for themselves if they wish.
+    # Traces are established for auto-configuration from the command line
+    # if any configurable options are accessed before the user calls
+    # [configure].
+    if {[LoadTimeCmdLineArgParsingRequired]} {
+	ProcessCmdLineArgs
+    } else {
+	EstablishAutoConfigureTraces
+    }
+
+    package provide [namespace tail [namespace current]] $Version
+}
diff --git a/windowsAgent/dist/tcl8/8.6/http-2.9.0.tm b/windowsAgent/dist/tcl8/8.6/http-2.9.0.tm
new file mode 100644
index 0000000..f82bced
--- /dev/null
+++ b/windowsAgent/dist/tcl8/8.6/http-2.9.0.tm
@@ -0,0 +1,3427 @@
+# http.tcl --
+#
+#	Client-side HTTP for GET, POST, and HEAD commands. These routines can
+#	be used in untrusted code that uses the Safesock security policy.
+#	These procedures use a callback interface to avoid using vwait, which
+#	is not defined in the safe base.
+#
+# See the file "license.terms" for information on usage and redistribution of
+# this file, and for a DISCLAIMER OF ALL WARRANTIES.
+
+package require Tcl 8.6-
+# Keep this in sync with pkgIndex.tcl and with the install directories in
+# Makefiles
+package provide http 2.9.0
+
+namespace eval http {
+    # Allow resourcing to not clobber existing data
+
+    variable http
+    if {![info exists http]} {
+	array set http {
+	    -accept */*
+	    -pipeline 1
+	    -postfresh 0
+	    -proxyhost {}
+	    -proxyport {}
+	    -proxyfilter http::ProxyRequired
+	    -repost 0
+	    -urlencoding utf-8
+	    -zip 1
+	}
+	# We need a useragent string of this style or various servers will
+	# refuse to send us compressed content even when we ask for it. This
+	# follows the de-facto layout of user-agent strings in current browsers.
+	# Safe interpreters do not have ::tcl_platform(os) or
+	# ::tcl_platform(osVersion).
+	if {[interp issafe]} {
+	    set http(-useragent) "Mozilla/5.0\
+		(Windows; U;\
+		Windows NT 10.0)\
+		http/[package provide http] Tcl/[package provide Tcl]"
+	} else {
+	    set http(-useragent) "Mozilla/5.0\
+		([string totitle $::tcl_platform(platform)]; U;\
+		$::tcl_platform(os) $::tcl_platform(osVersion))\
+		http/[package provide http] Tcl/[package provide Tcl]"
+	}
+    }
+
+    proc init {} {
+	# Set up the map for quoting chars. RFC3986 Section 2.3 say percent
+	# encode all except: "... percent-encoded octets in the ranges of
+	# ALPHA (%41-%5A and %61-%7A), DIGIT (%30-%39), hyphen (%2D), period
+	# (%2E), underscore (%5F), or tilde (%7E) should not be created by URI
+	# producers ..."
+	for {set i 0} {$i <= 256} {incr i} {
+	    set c [format %c $i]
+	    if {![string match {[-._~a-zA-Z0-9]} $c]} {
+		set map($c) %[format %.2X $i]
+	    }
+	}
+	# These are handled specially
+	set map(\n) %0D%0A
+	variable formMap [array get map]
+
+	# Create a map for HTTP/1.1 open sockets
+	variable socketMapping
+	variable socketRdState
+	variable socketWrState
+	variable socketRdQueue
+	variable socketWrQueue
+	variable socketClosing
+	variable socketPlayCmd
+	if {[info exists socketMapping]} {
+	    # Close open sockets on re-init.  Do not permit retries.
+	    foreach {url sock} [array get socketMapping] {
+		unset -nocomplain socketClosing($url)
+		unset -nocomplain socketPlayCmd($url)
+		CloseSocket $sock
+	    }
+	}
+
+	# CloseSocket should have unset the socket* arrays, one element at
+	# a time.  Now unset anything that was overlooked.
+	# Traces on "unset socketRdState(*)" will call CancelReadPipeline and
+	# cancel any queued responses.
+	# Traces on "unset socketWrState(*)" will call CancelWritePipeline and
+	# cancel any queued requests.
+	array unset socketMapping
+	array unset socketRdState
+	array unset socketWrState
+	array unset socketRdQueue
+	array unset socketWrQueue
+	array unset socketClosing
+	array unset socketPlayCmd
+	array set socketMapping {}
+	array set socketRdState {}
+	array set socketWrState {}
+	array set socketRdQueue {}
+	array set socketWrQueue {}
+	array set socketClosing {}
+	array set socketPlayCmd {}
+    }
+    init
+
+    variable urlTypes
+    if {![info exists urlTypes]} {
+	set urlTypes(http) [list 80 ::socket]
+    }
+
+    variable encodings [string tolower [encoding names]]
+    # This can be changed, but iso8859-1 is the RFC standard.
+    variable defaultCharset
+    if {![info exists defaultCharset]} {
+	set defaultCharset "iso8859-1"
+    }
+
+    # Force RFC 3986 strictness in geturl url verification?
+    variable strict
+    if {![info exists strict]} {
+	set strict 1
+    }
+
+    # Let user control default keepalive for compatibility
+    variable defaultKeepalive
+    if {![info exists defaultKeepalive]} {
+	set defaultKeepalive 0
+    }
+
+    namespace export geturl config reset wait formatQuery quoteString
+    namespace export register unregister registerError
+    # - Useful, but not exported: data, size, status, code, cleanup, error,
+    #   meta, ncode, mapReply, init.  Comments suggest that "init" can be used
+    #   for re-initialisation, although the command is undocumented.
+    # - Not exported, probably should be upper-case initial letter as part
+    #   of the internals: getTextLine, make-transformation-chunked.
+}
+
+# http::Log --
+#
+#	Debugging output -- define this to observe HTTP/1.1 socket usage.
+#	Should echo any args received.
+#
+# Arguments:
+#     msg	Message to output
+#
+if {[info command http::Log] eq {}} {proc http::Log {args} {}}
+
+# http::register --
+#
+#     See documentation for details.
+#
+# Arguments:
+#     proto	URL protocol prefix, e.g. https
+#     port	Default port for protocol
+#     command	Command to use to create socket
+# Results:
+#     list of port and command that was registered.
+
+proc http::register {proto port command} {
+    variable urlTypes
+    set urlTypes([string tolower $proto]) [list $port $command]
+}
+
+# http::unregister --
+#
+#     Unregisters URL protocol handler
+#
+# Arguments:
+#     proto	URL protocol prefix, e.g. https
+# Results:
+#     list of port and command that was unregistered.
+
+proc http::unregister {proto} {
+    variable urlTypes
+    set lower [string tolower $proto]
+    if {![info exists urlTypes($lower)]} {
+	return -code error "unsupported url type \"$proto\""
+    }
+    set old $urlTypes($lower)
+    unset urlTypes($lower)
+    return $old
+}
+
+# http::config --
+#
+#	See documentation for details.
+#
+# Arguments:
+#	args		Options parsed by the procedure.
+# Results:
+#        TODO
+
+proc http::config {args} {
+    variable http
+    set options [lsort [array names http -*]]
+    set usage [join $options ", "]
+    if {[llength $args] == 0} {
+	set result {}
+	foreach name $options {
+	    lappend result $name $http($name)
+	}
+	return $result
+    }
+    set options [string map {- ""} $options]
+    set pat ^-(?:[join $options |])$
+    if {[llength $args] == 1} {
+	set flag [lindex $args 0]
+	if {![regexp -- $pat $flag]} {
+	    return -code error "Unknown option $flag, must be: $usage"
+	}
+	return $http($flag)
+    } else {
+	foreach {flag value} $args {
+	    if {![regexp -- $pat $flag]} {
+		return -code error "Unknown option $flag, must be: $usage"
+	    }
+	    set http($flag) $value
+	}
+    }
+}
+
+# http::Finish --
+#
+#	Clean up the socket and eval close time callbacks
+#
+# Arguments:
+#	token	    Connection token.
+#	errormsg    (optional) If set, forces status to error.
+#	skipCB      (optional) If set, don't call the -command callback. This
+#		    is useful when geturl wants to throw an exception instead
+#		    of calling the callback. That way, the same error isn't
+#		    reported to two places.
+#
+# Side Effects:
+#        May close the socket.
+
+proc http::Finish {token {errormsg ""} {skipCB 0}} {
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    variable $token
+    upvar 0 $token state
+    global errorInfo errorCode
+    set closeQueue 0
+    if {$errormsg ne ""} {
+	set state(error) [list $errormsg $errorInfo $errorCode]
+	set state(status) "error"
+    }
+    if {[info commands ${token}EventCoroutine] ne {}} {
+	rename ${token}EventCoroutine {}
+    }
+    if {  ($state(status) eq "timeout")
+       || ($state(status) eq "error")
+       || ($state(status) eq "eof")
+       || ([info exists state(-keepalive)] && !$state(-keepalive))
+       || ([info exists state(connection)] && ($state(connection) eq "close"))
+    } {
+	set closeQueue 1
+	set connId $state(socketinfo)
+	set sock $state(sock)
+	CloseSocket $state(sock) $token
+    } elseif {
+	  ([info exists state(-keepalive)] && $state(-keepalive))
+       && ([info exists state(connection)] && ($state(connection) ne "close"))
+    } {
+	KeepSocket $token
+    }
+    if {[info exists state(after)]} {
+	after cancel $state(after)
+	unset state(after)
+    }
+    if {[info exists state(-command)] && (!$skipCB)
+	    && (![info exists state(done-command-cb)])} {
+	set state(done-command-cb) yes
+	if {[catch {eval $state(-command) {$token}} err] && $errormsg eq ""} {
+	    set state(error) [list $err $errorInfo $errorCode]
+	    set state(status) error
+	}
+    }
+
+    if {    $closeQueue
+	 && [info exists socketMapping($connId)]
+	 && ($socketMapping($connId) eq $sock)
+    } {
+	http::CloseQueuedQueries $connId $token
+    }
+}
+
+# http::KeepSocket -
+#
+#	Keep a socket in the persistent sockets table and connect it to its next
+#	queued task if possible.  Otherwise leave it idle and ready for its next
+#	use.
+#
+#	If $socketClosing(*), then ($state(connection) eq "close") and therefore
+#	this command will not be called by Finish.
+#
+# Arguments:
+#	token	    Connection token.
+
+proc http::KeepSocket {token} {
+    variable http
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    variable $token
+    upvar 0 $token state
+    set tk [namespace tail $token]
+
+    # Keep this socket open for another request ("Keep-Alive").
+    # React if the server half-closes the socket.
+    # Discussion is in http::geturl.
+    catch {fileevent $state(sock) readable [list http::CheckEof $state(sock)]}
+
+    # The line below should not be changed in production code.
+    # It is edited by the test suite.
+    set TEST_EOF 0
+    if {$TEST_EOF} {
+	# ONLY for testing reaction to server eof.
+	# No server timeouts will be caught.
+	catch {fileevent $state(sock) readable {}}
+    }
+
+    if {    [info exists state(socketinfo)]
+	 && [info exists socketMapping($state(socketinfo))]
+    } {
+	set connId $state(socketinfo)
+	# The value "Rready" is set only here.
+	set socketRdState($connId) Rready
+
+	if {    $state(-pipeline)
+	     && [info exists socketRdQueue($connId)]
+	     && [llength $socketRdQueue($connId)]
+	} {
+	    # The usual case for pipelined responses - if another response is
+	    # queued, arrange to read it.
+	    set token3 [lindex $socketRdQueue($connId) 0]
+	    set socketRdQueue($connId) [lrange $socketRdQueue($connId) 1 end]
+	    variable $token3
+	    upvar 0 $token3 state3
+	    set tk2 [namespace tail $token3]
+
+	    #Log pipelined, GRANT read access to $token3 in KeepSocket
+	    set socketRdState($connId) $token3
+	    ReceiveResponse $token3
+
+	    # Other pipelined cases.
+	    # - The test above ensures that, for the pipelined cases in the two
+	    #   tests below, the read queue is empty.
+	    # - In those two tests, check whether the next write will be
+	    #   nonpipeline.
+	} elseif {
+		$state(-pipeline)
+	     && [info exists socketWrState($connId)]
+	     && ($socketWrState($connId) eq "peNding")
+
+	     && [info exists socketWrQueue($connId)]
+	     && [llength $socketWrQueue($connId)]
+	     && (![set token3 [lindex $socketWrQueue($connId) 0]
+		   set ${token3}(-pipeline)
+		  ]
+		)
+	} {
+	    # This case:
+	    # - Now it the time to run the "pending" request.
+	    # - The next token in the write queue is nonpipeline, and
+	    #   socketWrState has been marked "pending" (in
+	    #   http::NextPipelinedWrite or http::geturl) so a new pipelined
+	    #   request cannot jump the queue.
+	    #
+	    # Tests:
+	    # - In this case the read queue (tested above) is empty and this
+	    #   "pending" write token is in front of the rest of the write
+	    #   queue.
+	    # - The write state is not Wready and therefore appears to be busy,
+	    #   but because it is "pending" we know that it is reserved for the
+	    #   first item in the write queue, a non-pipelined request that is
+	    #   waiting for the read queue to empty.  That has now happened: so
+	    #   give that request read and write access.
+	    variable $token3
+	    set conn [set ${token3}(tmpConnArgs)]
+	    #Log nonpipeline, GRANT r/w access to $token3 in KeepSocket
+	    set socketRdState($connId) $token3
+	    set socketWrState($connId) $token3
+	    set socketWrQueue($connId) [lrange $socketWrQueue($connId) 1 end]
+	    # Connect does its own fconfigure.
+	    fileevent $state(sock) writable [list http::Connect $token3 {*}$conn]
+	    #Log ---- $state(sock) << conn to $token3 for HTTP request (c)
+
+	} elseif {
+		$state(-pipeline)
+	     && [info exists socketWrState($connId)]
+	     && ($socketWrState($connId) eq "peNding")
+
+	} {
+	    # Should not come here.  The second block in the previous "elseif"
+	    # test should be tautologous (but was needed in an earlier
+	    # implementation) and will be removed after testing.
+	    # If we get here, the value "pending" was assigned in error.
+	    # This error would block the queue for ever.
+	    Log ^X$tk <<<<< Error in queueing of requests >>>>> - token $token
+
+	} elseif {
+		$state(-pipeline)
+	     && [info exists socketWrState($connId)]
+	     && ($socketWrState($connId) eq "Wready")
+
+	     && [info exists socketWrQueue($connId)]
+	     && [llength $socketWrQueue($connId)]
+	     && (![set token3 [lindex $socketWrQueue($connId) 0]
+		   set ${token3}(-pipeline)
+		  ]
+		)
+	} {
+	    # This case:
+	    # - The next token in the write queue is nonpipeline, and
+	    #   socketWrState is Wready.  Get the next event from socketWrQueue.
+	    # Tests:
+	    # - In this case the read state (tested above) is Rready and the
+	    #   write state (tested here) is Wready - there is no "pending"
+	    #   request.
+	    # Code:
+	    # - The code is the same as the code below for the nonpipelined
+	    #   case with a queued request.
+	    variable $token3
+	    set conn [set ${token3}(tmpConnArgs)]
+	    #Log nonpipeline, GRANT r/w access to $token3 in KeepSocket
+	    set socketRdState($connId) $token3
+	    set socketWrState($connId) $token3
+	    set socketWrQueue($connId) [lrange $socketWrQueue($connId) 1 end]
+	    # Connect does its own fconfigure.
+	    fileevent $state(sock) writable [list http::Connect $token3 {*}$conn]
+	    #Log ---- $state(sock) << conn to $token3 for HTTP request (c)
+
+	} elseif {
+		(!$state(-pipeline))
+	     && [info exists socketWrQueue($connId)]
+	     && [llength $socketWrQueue($connId)]
+	     && ($state(connection) ne "close")
+	} {
+	    # If not pipelined, (socketRdState eq Rready) tells us that we are
+	    # ready for the next write - there is no need to check
+	    # socketWrState. Write the next request, if one is waiting.
+	    # If the next request is pipelined, it receives premature read
+	    # access to the socket. This is not a problem.
+	    set token3 [lindex $socketWrQueue($connId) 0]
+	    variable $token3
+	    set conn [set ${token3}(tmpConnArgs)]
+	    #Log nonpipeline, GRANT r/w access to $token3 in KeepSocket
+	    set socketRdState($connId) $token3
+	    set socketWrState($connId) $token3
+	    set socketWrQueue($connId) [lrange $socketWrQueue($connId) 1 end]
+	    # Connect does its own fconfigure.
+	    fileevent $state(sock) writable [list http::Connect $token3 {*}$conn]
+	    #Log ---- $state(sock) << conn to $token3 for HTTP request (d)
+
+	} elseif {(!$state(-pipeline))} {
+	    set socketWrState($connId) Wready
+	    # Rready and Wready and idle: nothing to do.
+	}
+
+    } else {
+	CloseSocket $state(sock) $token
+	# There is no socketMapping($state(socketinfo)), so it does not matter
+	# that CloseQueuedQueries is not called.
+    }
+}
+
+# http::CheckEof -
+#
+#	Read from a socket and close it if eof.
+#	The command is bound to "fileevent readable" on an idle socket, and
+#	"eof" is the only event that should trigger the binding, occurring when
+#	the server times out and half-closes the socket.
+#
+#	A read is necessary so that [eof] gives a meaningful result.
+#	Any bytes sent are junk (or a bug).
+
+proc http::CheckEof {sock} {
+    set junk [read $sock]
+    set n [string length $junk]
+    if {$n} {
+	Log "WARNING: $n bytes received but no HTTP request sent"
+    }
+
+    if {[catch {eof $sock} res] || $res} {
+	# The server has half-closed the socket.
+	# If a new write has started, its transaction will fail and
+	# will then be error-handled.
+	CloseSocket $sock
+    }
+}
+
+# http::CloseSocket -
+#
+#	Close a socket and remove it from the persistent sockets table.  If
+#	possible an http token is included here but when we are called from a
+#	fileevent on remote closure we need to find the correct entry - hence
+#	the "else" block of the first "if" command.
+
+proc http::CloseSocket {s {token {}}} {
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    set tk [namespace tail $token]
+
+    catch {fileevent $s readable {}}
+    set connId {}
+    if {$token ne ""} {
+	variable $token
+	upvar 0 $token state
+	if {[info exists state(socketinfo)]} {
+	    set connId $state(socketinfo)
+	}
+    } else {
+	set map [array get socketMapping]
+	set ndx [lsearch -exact $map $s]
+	if {$ndx != -1} {
+	    incr ndx -1
+	    set connId [lindex $map $ndx]
+	}
+    }
+    if {    ($connId ne {})
+	 && [info exists socketMapping($connId)]
+	 && ($socketMapping($connId) eq $s)
+    } {
+	Log "Closing connection $connId (sock $socketMapping($connId))"
+	if {[catch {close $socketMapping($connId)} err]} {
+	    Log "Error closing connection: $err"
+	}
+	if {$token eq {}} {
+	    # Cases with a non-empty token are handled by Finish, so the tokens
+	    # are finished in connection order.
+	    http::CloseQueuedQueries $connId
+	}
+    } else {
+	Log "Closing socket $s (no connection info)"
+	if {[catch {close $s} err]} {
+	    Log "Error closing socket: $err"
+	}
+    }
+}
+
+# http::CloseQueuedQueries
+#
+#	connId  - identifier "domain:port" for the connection
+#	token   - (optional) used only for logging
+#
+# Called from http::CloseSocket and http::Finish, after a connection is closed,
+# to clear the read and write queues if this has not already been done.
+
+proc http::CloseQueuedQueries {connId {token {}}} {
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    if {![info exists socketMapping($connId)]} {
+	# Command has already been called.
+	# Don't come here again - especially recursively.
+	return
+    }
+
+    # Used only for logging.
+    if {$token eq {}} {
+	set tk {}
+    } else {
+	set tk [namespace tail $token]
+    }
+
+    if {    [info exists socketPlayCmd($connId)]
+	 && ($socketPlayCmd($connId) ne {ReplayIfClose Wready {} {}})
+    } {
+	# Before unsetting, there is some unfinished business.
+	# - If the server sent "Connection: close", we have stored the command
+	#   for retrying any queued requests in socketPlayCmd, so copy that
+	#   value for execution below.  socketClosing(*) was also set.
+	# - Also clear the queues to prevent calls to Finish that would set the
+	#   state for the requests that will be retried to "finished with error
+	#   status".
+	set unfinished $socketPlayCmd($connId)
+	set socketRdQueue($connId) {}
+	set socketWrQueue($connId) {}
+    } else {
+	set unfinished {}
+    }
+
+    Unset $connId
+
+    if {$unfinished ne {}} {
+	Log ^R$tk Any unfinished transactions (excluding $token) failed \
+		- token $token
+	{*}$unfinished
+    }
+}
+
+# http::Unset
+#
+#	The trace on "unset socketRdState(*)" will call CancelReadPipeline
+#	and cancel any queued responses.
+#	The trace on "unset socketWrState(*)" will call CancelWritePipeline
+#	and cancel any queued requests.
+
+proc http::Unset {connId} {
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    unset socketMapping($connId)
+    unset socketRdState($connId)
+    unset socketWrState($connId)
+    unset -nocomplain socketRdQueue($connId)
+    unset -nocomplain socketWrQueue($connId)
+    unset -nocomplain socketClosing($connId)
+    unset -nocomplain socketPlayCmd($connId)
+}
+
+# http::reset --
+#
+#	See documentation for details.
+#
+# Arguments:
+#	token	Connection token.
+#	why	Status info.
+#
+# Side Effects:
+#        See Finish
+
+proc http::reset {token {why reset}} {
+    variable $token
+    upvar 0 $token state
+    set state(status) $why
+    catch {fileevent $state(sock) readable {}}
+    catch {fileevent $state(sock) writable {}}
+    Finish $token
+    if {[info exists state(error)]} {
+	set errorlist $state(error)
+	unset state
+	eval ::error $errorlist
+    }
+}
+
+# http::geturl --
+#
+#	Establishes a connection to a remote url via http.
+#
+# Arguments:
+#	url		The http URL to goget.
+#	args		Option value pairs. Valid options include:
+#				-blocksize, -validate, -headers, -timeout
+# Results:
+#	Returns a token for this connection. This token is the name of an
+#	array that the caller should unset to garbage collect the state.
+
+proc http::geturl {url args} {
+    variable http
+    variable urlTypes
+    variable defaultCharset
+    variable defaultKeepalive
+    variable strict
+
+    # Initialize the state variable, an array. We'll return the name of this
+    # array as the token for the transaction.
+
+    if {![info exists http(uid)]} {
+	set http(uid) 0
+    }
+    set token [namespace current]::[incr http(uid)]
+    ##Log Starting http::geturl - token $token
+    variable $token
+    upvar 0 $token state
+    set tk [namespace tail $token]
+    reset $token
+    Log ^A$tk URL $url - token $token
+
+    # Process command options.
+
+    array set state {
+	-binary		false
+	-blocksize	8192
+	-queryblocksize 8192
+	-validate	0
+	-headers	{}
+	-timeout	0
+	-type		application/x-www-form-urlencoded
+	-queryprogress	{}
+	-protocol	1.1
+	binary		0
+	state		created
+	meta		{}
+	method		{}
+	coding		{}
+	currentsize	0
+	totalsize	0
+	querylength	0
+	queryoffset	0
+	type		text/html
+	body		{}
+	status		""
+	http		""
+	connection	close
+    }
+    set state(-keepalive) $defaultKeepalive
+    set state(-strict) $strict
+    # These flags have their types verified [Bug 811170]
+    array set type {
+	-binary		boolean
+	-blocksize	integer
+	-queryblocksize integer
+	-strict		boolean
+	-timeout	integer
+	-validate	boolean
+    }
+    set state(charset)	$defaultCharset
+    set options {
+	-binary -blocksize -channel -command -handler -headers -keepalive
+	-method -myaddr -progress -protocol -query -queryblocksize
+	-querychannel -queryprogress -strict -timeout -type -validate
+    }
+    set usage [join [lsort $options] ", "]
+    set options [string map {- ""} $options]
+    set pat ^-(?:[join $options |])$
+    foreach {flag value} $args {
+	if {[regexp -- $pat $flag]} {
+	    # Validate numbers
+	    if {
+		[info exists type($flag)] &&
+		![string is $type($flag) -strict $value]
+	    } {
+		unset $token
+		return -code error \
+		    "Bad value for $flag ($value), must be $type($flag)"
+	    }
+	    set state($flag) $value
+	} else {
+	    unset $token
+	    return -code error "Unknown option $flag, can be: $usage"
+	}
+    }
+
+    # Make sure -query and -querychannel aren't both specified
+
+    set isQueryChannel [info exists state(-querychannel)]
+    set isQuery [info exists state(-query)]
+    if {$isQuery && $isQueryChannel} {
+	unset $token
+	return -code error "Can't combine -query and -querychannel options!"
+    }
+
+    # Validate URL, determine the server host and port, and check proxy case
+    # Recognize user:pass@host URLs also, although we do not do anything with
+    # that info yet.
+
+    # URLs have basically four parts.
+    # First, before the colon, is the protocol scheme (e.g. http)
+    # Second, for HTTP-like protocols, is the authority
+    #	The authority is preceded by // and lasts up to (but not including)
+    #	the following / or ? and it identifies up to four parts, of which
+    #	only one, the host, is required (if an authority is present at all).
+    #	All other parts of the authority (user name, password, port number)
+    #	are optional.
+    # Third is the resource name, which is split into two parts at a ?
+    #	The first part (from the single "/" up to "?") is the path, and the
+    #	second part (from that "?" up to "#") is the query. *HOWEVER*, we do
+    #	not need to separate them; we send the whole lot to the server.
+    #	Both, path and query are allowed to be missing, including their
+    #	delimiting character.
+    # Fourth is the fragment identifier, which is everything after the first
+    #	"#" in the URL. The fragment identifier MUST NOT be sent to the server
+    #	and indeed, we don't bother to validate it (it could be an error to
+    #	pass it in here, but it's cheap to strip).
+    #
+    # An example of a URL that has all the parts:
+    #
+    #     http://jschmoe:xyzzy@www.bogus.net:8000/foo/bar.tml?q=foo#changes
+    #
+    # The "http" is the protocol, the user is "jschmoe", the password is
+    # "xyzzy", the host is "www.bogus.net", the port is "8000", the path is
+    # "/foo/bar.tml", the query is "q=foo", and the fragment is "changes".
+    #
+    # Note that the RE actually combines the user and password parts, as
+    # recommended in RFC 3986. Indeed, that RFC states that putting passwords
+    # in URLs is a Really Bad Idea, something with which I would agree utterly.
+    #
+    # From a validation perspective, we need to ensure that the parts of the
+    # URL that are going to the server are correctly encoded.  This is only
+    # done if $state(-strict) is true (inherited from $::http::strict).
+
+    set URLmatcher {(?x)		# this is _expanded_ syntax
+	^
+	(?: (\w+) : ) ?			# <protocol scheme>
+	(?: //
+	    (?:
+		(
+		    [^@/\#?]+		# <userinfo part of authority>
+		) @
+	    )?
+	    (				# <host part of authority>
+		[^/:\#?]+ |		# host name or IPv4 address
+		\[ [^/\#?]+ \]		# IPv6 address in square brackets
+	    )
+	    (?: : (\d+) )?		# <port part of authority>
+	)?
+	( [/\?] [^\#]*)?		# <path> (including query)
+	(?: \# (.*) )?			# <fragment>
+	$
+    }
+
+    # Phase one: parse
+    if {![regexp -- $URLmatcher $url -> proto user host port srvurl]} {
+	unset $token
+	return -code error "Unsupported URL: $url"
+    }
+    # Phase two: validate
+    set host [string trim $host {[]}]; # strip square brackets from IPv6 address
+    if {$host eq ""} {
+	# Caller has to provide a host name; we do not have a "default host"
+	# that would enable us to handle relative URLs.
+	unset $token
+	return -code error "Missing host part: $url"
+	# Note that we don't check the hostname for validity here; if it's
+	# invalid, we'll simply fail to resolve it later on.
+    }
+    if {$port ne "" && $port > 65535} {
+	unset $token
+	return -code error "Invalid port number: $port"
+    }
+    # The user identification and resource identification parts of the URL can
+    # have encoded characters in them; take care!
+    if {$user ne ""} {
+	# Check for validity according to RFC 3986, Appendix A
+	set validityRE {(?xi)
+	    ^
+	    (?: [-\w.~!$&'()*+,;=:] | %[0-9a-f][0-9a-f] )+
+	    $
+	}
+	if {$state(-strict) && ![regexp -- $validityRE $user]} {
+	    unset $token
+	    # Provide a better error message in this error case
+	    if {[regexp {(?i)%(?![0-9a-f][0-9a-f]).?.?} $user bad]} {
+		return -code error \
+			"Illegal encoding character usage \"$bad\" in URL user"
+	    }
+	    return -code error "Illegal characters in URL user"
+	}
+    }
+    if {$srvurl ne ""} {
+	# RFC 3986 allows empty paths (not even a /), but servers
+	# return 400 if the path in the HTTP request doesn't start
+	# with / , so add it here if needed.
+	if {[string index $srvurl 0] ne "/"} {
+	    set srvurl /$srvurl
+	}
+	# Check for validity according to RFC 3986, Appendix A
+	set validityRE {(?xi)
+	    ^
+	    # Path part (already must start with / character)
+	    (?:	      [-\w.~!$&'()*+,;=:@/]  | %[0-9a-f][0-9a-f] )*
+	    # Query part (optional, permits ? characters)
+	    (?: \? (?: [-\w.~!$&'()*+,;=:@/?] | %[0-9a-f][0-9a-f] )* )?
+	    $
+	}
+	if {$state(-strict) && ![regexp -- $validityRE $srvurl]} {
+	    unset $token
+	    # Provide a better error message in this error case
+	    if {[regexp {(?i)%(?![0-9a-f][0-9a-f])..} $srvurl bad]} {
+		return -code error \
+		    "Illegal encoding character usage \"$bad\" in URL path"
+	    }
+	    return -code error "Illegal characters in URL path"
+	}
+    } else {
+	set srvurl /
+    }
+    if {$proto eq ""} {
+	set proto http
+    }
+    set lower [string tolower $proto]
+    if {![info exists urlTypes($lower)]} {
+	unset $token
+	return -code error "Unsupported URL type \"$proto\""
+    }
+    set defport [lindex $urlTypes($lower) 0]
+    set defcmd [lindex $urlTypes($lower) 1]
+
+    if {$port eq ""} {
+	set port $defport
+    }
+    if {![catch {$http(-proxyfilter) $host} proxy]} {
+	set phost [lindex $proxy 0]
+	set pport [lindex $proxy 1]
+    }
+
+    # OK, now reassemble into a full URL
+    set url ${proto}://
+    if {$user ne ""} {
+	append url $user
+	append url @
+    }
+    append url $host
+    if {$port != $defport} {
+	append url : $port
+    }
+    append url $srvurl
+    # Don't append the fragment!
+    set state(url) $url
+
+    set sockopts [list -async]
+
+    # If we are using the proxy, we must pass in the full URL that includes
+    # the server name.
+
+    if {[info exists phost] && ($phost ne "")} {
+	set srvurl $url
+	set targetAddr [list $phost $pport]
+    } else {
+	set targetAddr [list $host $port]
+    }
+    # Proxy connections aren't shared among different hosts.
+    set state(socketinfo) $host:$port
+
+    # Save the accept types at this point to prevent a race condition. [Bug
+    # c11a51c482]
+    set state(accept-types) $http(-accept)
+
+    if {$isQuery || $isQueryChannel} {
+	# It's a POST.
+	# A client wishing to send a non-idempotent request SHOULD wait to send
+	# that request until it has received the response status for the
+	# previous request.
+	if {$http(-postfresh)} {
+	    # Override -keepalive for a POST.  Use a new connection, and thus
+	    # avoid the small risk of a race against server timeout.
+	    set state(-keepalive) 0
+	} else {
+	    # Allow -keepalive but do not -pipeline - wait for the previous
+	    # transaction to finish.
+	    # There is a small risk of a race against server timeout.
+	    set state(-pipeline) 0
+	}
+    } else {
+	# It's a GET or HEAD.
+	set state(-pipeline) $http(-pipeline)
+    }
+
+    # See if we are supposed to use a previously opened channel.
+    # - In principle, ANY call to http::geturl could use a previously opened
+    #   channel if it is available - the "Connection: keep-alive" header is a
+    #   request to leave the channel open AFTER completion of this call.
+    # - In fact, we try to use an existing channel only if -keepalive 1 -- this
+    #   means that at most one channel is left open for each value of
+    #   $state(socketinfo). This property simplifies the mapping of open
+    #   channels.
+    set reusing 0
+    set alreadyQueued 0
+    if {$state(-keepalive)} {
+	variable socketMapping
+	variable socketRdState
+	variable socketWrState
+	variable socketRdQueue
+	variable socketWrQueue
+	variable socketClosing
+	variable socketPlayCmd
+
+	if {[info exists socketMapping($state(socketinfo))]} {
+	    # - If the connection is idle, it has a "fileevent readable" binding
+	    #   to http::CheckEof, in case the server times out and half-closes
+	    #   the socket (http::CheckEof closes the other half).
+	    # - We leave this binding in place until just before the last
+	    #   puts+flush in http::Connected (GET/HEAD) or http::Write (POST),
+	    #   after which the HTTP response might be generated.
+
+	    if {    [info exists socketClosing($state(socketinfo))]
+		       && $socketClosing($state(socketinfo))
+	    } {
+		# socketClosing(*) is set because the server has sent a
+		# "Connection: close" header.
+		# Do not use the persistent socket again.
+		# Since we have only one persistent socket per server, and the
+		# old socket is not yet dead, add the request to the write queue
+		# of the dying socket, which will be replayed by ReplayIfClose.
+		# Also add it to socketWrQueue(*) which is used only if an error
+		# causes a call to Finish.
+		set reusing 1
+		set sock $socketMapping($state(socketinfo))
+		Log "reusing socket $sock for $state(socketinfo) - token $token"
+
+		set alreadyQueued 1
+		lassign $socketPlayCmd($state(socketinfo)) com0 com1 com2 com3
+		lappend com3 $token
+		set socketPlayCmd($state(socketinfo)) [list $com0 $com1 $com2 $com3]
+		lappend socketWrQueue($state(socketinfo)) $token
+	    } elseif {[catch {fconfigure $socketMapping($state(socketinfo))}]} {
+		# FIXME Is it still possible for this code to be executed? If
+		#       so, this could be another place to call TestForReplay,
+		#       rather than discarding the queued transactions.
+		Log "WARNING: socket for $state(socketinfo) was closed\
+			- token $token"
+		Log "WARNING - if testing, pay special attention to this\
+			case (GH) which is seldom executed - token $token"
+
+		# This will call CancelReadPipeline, CancelWritePipeline, and
+		# cancel any queued requests, responses.
+		Unset $state(socketinfo)
+	    } else {
+		# Use the persistent socket.
+		# The socket may not be ready to write: an earlier request might
+		# still be still writing (in the pipelined case) or
+		# writing/reading (in the nonpipeline case). This possibility
+		# is handled by socketWrQueue later in this command.
+		set reusing 1
+		set sock $socketMapping($state(socketinfo))
+		Log "reusing socket $sock for $state(socketinfo) - token $token"
+
+	    }
+	    # Do not automatically close the connection socket.
+	    set state(connection) {}
+	}
+    }
+
+    if {$reusing} {
+	# Define state(tmpState) and state(tmpOpenCmd) for use
+	# by http::ReplayIfDead if the persistent connection has died.
+	set state(tmpState) [array get state]
+
+	# Pass -myaddr directly to the socket command
+	if {[info exists state(-myaddr)]} {
+	    lappend sockopts -myaddr $state(-myaddr)
+	}
+
+	set state(tmpOpenCmd) [list {*}$defcmd {*}$sockopts {*}$targetAddr]
+    }
+
+    set state(reusing) $reusing
+    # Excluding ReplayIfDead and the decision whether to call it, there are four
+    # places outside http::geturl where state(reusing) is used:
+    # - Connected   - if reusing and not pipelined, start the state(-timeout)
+    #                 timeout (when writing).
+    # - DoneRequest - if reusing and pipelined, send the next pipelined write
+    # - Event       - if reusing and pipelined, start the state(-timeout)
+    #                 timeout (when reading).
+    # - Event       - if (not reusing) and pipelined, send the next pipelined
+    #                 write
+
+    # See comments above re the start of this timeout in other cases.
+    if {(!$state(reusing)) && ($state(-timeout) > 0)} {
+	set state(after) [after $state(-timeout) \
+		[list http::reset $token timeout]]
+    }
+
+    if {![info exists sock]} {
+	# Pass -myaddr directly to the socket command
+	if {[info exists state(-myaddr)]} {
+	    lappend sockopts -myaddr $state(-myaddr)
+	}
+	set pre [clock milliseconds]
+	##Log pre socket opened, - token $token
+	##Log [concat $defcmd $sockopts $targetAddr] - token $token
+	if {[catch {eval $defcmd $sockopts $targetAddr} sock errdict]} {
+	    # Something went wrong while trying to establish the connection.
+	    # Clean up after events and such, but DON'T call the command
+	    # callback (if available) because we're going to throw an
+	    # exception from here instead.
+
+	    set state(sock) NONE
+	    Finish $token $sock 1
+	    cleanup $token
+	    dict unset errdict -level
+	    return -options $errdict $sock
+	} else {
+	    # Initialisation of a new socket.
+	    ##Log post socket opened, - token $token
+	    ##Log socket opened, now fconfigure - token $token
+	    set delay [expr {[clock milliseconds] - $pre}]
+	    if {$delay > 3000} {
+		Log socket delay $delay - token $token
+	    }
+	    fconfigure $sock -translation {auto crlf} \
+			     -buffersize $state(-blocksize)
+	    ##Log socket opened, DONE fconfigure - token $token
+	}
+    }
+    # Command [socket] is called with -async, but takes 5s to 5.1s to return,
+    # with probability of order 1 in 10,000.  This may be a bizarre scheduling
+    # issue with my (KJN's) system (Fedora Linux).
+    # This does not cause a problem (unless the request times out when this
+    # command returns).
+
+    set state(sock) $sock
+    Log "Using $sock for $state(socketinfo) - token $token" \
+	[expr {$state(-keepalive)?"keepalive":""}]
+
+    if {    $state(-keepalive)
+	 && (![info exists socketMapping($state(socketinfo))])
+    } {
+	# Freshly-opened socket that we would like to become persistent.
+	set socketMapping($state(socketinfo)) $sock
+
+	if {![info exists socketRdState($state(socketinfo))]} {
+	    set socketRdState($state(socketinfo)) {}
+	    set varName ::http::socketRdState($state(socketinfo))
+	    trace add variable $varName unset ::http::CancelReadPipeline
+	}
+	if {![info exists socketWrState($state(socketinfo))]} {
+	    set socketWrState($state(socketinfo)) {}
+	    set varName ::http::socketWrState($state(socketinfo))
+	    trace add variable $varName unset ::http::CancelWritePipeline
+	}
+
+	if {$state(-pipeline)} {
+	    #Log new, init for pipelined, GRANT write access to $token in geturl
+	    # Also grant premature read access to the socket. This is OK.
+	    set socketRdState($state(socketinfo)) $token
+	    set socketWrState($state(socketinfo)) $token
+	} else {
+	    # socketWrState is not used by this non-pipelined transaction.
+	    # We cannot leave it as "Wready" because the next call to
+	    # http::geturl with a pipelined transaction would conclude that the
+	    # socket is available for writing.
+	    #Log new, init for nonpipeline, GRANT r/w access to $token in geturl
+	    set socketRdState($state(socketinfo)) $token
+	    set socketWrState($state(socketinfo)) $token
+	}
+
+	set socketRdQueue($state(socketinfo)) {}
+	set socketWrQueue($state(socketinfo)) {}
+	set socketClosing($state(socketinfo)) 0
+	set socketPlayCmd($state(socketinfo)) {ReplayIfClose Wready {} {}}
+    }
+
+    if {![info exists phost]} {
+	set phost ""
+    }
+    if {$reusing} {
+	# For use by http::ReplayIfDead if the persistent connection has died.
+	# Also used by NextPipelinedWrite.
+	set state(tmpConnArgs) [list $proto $phost $srvurl]
+    }
+
+    # The element socketWrState($connId) has a value which is either the name of
+    # the token that is permitted to write to the socket, or "Wready" if no
+    # token is permitted to write.
+    #
+    # The code that sets the value to Wready immediately calls
+    # http::NextPipelinedWrite, which examines socketWrQueue($connId) and
+    # processes the next request in the queue, if there is one.  The value
+    # Wready is not found when the interpreter is in the event loop unless the
+    # socket is idle.
+    #
+    # The element socketRdState($connId) has a value which is either the name of
+    # the token that is permitted to read from the socket, or "Rready" if no
+    # token is permitted to read.
+    #
+    # The code that sets the value to Rready then examines
+    # socketRdQueue($connId) and processes the next request in the queue, if
+    # there is one.  The value Rready is not found when the interpreter is in
+    # the event loop unless the socket is idle.
+
+    if {$alreadyQueued} {
+	# A write may or may not be in progress.  There is no need to set
+	# socketWrState to prevent another call stealing write access - all
+	# subsequent calls on this socket will come here because the socket
+	# will close after the current read, and its
+	# socketClosing($connId) is 1.
+	##Log "HTTP request for token $token is queued"
+
+    } elseif {    $reusing
+	       && $state(-pipeline)
+	       && ($socketWrState($state(socketinfo)) ne "Wready")
+    } {
+	##Log "HTTP request for token $token is queued for pipelined use"
+	lappend socketWrQueue($state(socketinfo)) $token
+
+    } elseif {    $reusing
+	       && (!$state(-pipeline))
+	       && ($socketWrState($state(socketinfo)) ne "Wready")
+    } {
+	# A write is queued or in progress.  Lappend to the write queue.
+	##Log "HTTP request for token $token is queued for nonpipeline use"
+	lappend socketWrQueue($state(socketinfo)) $token
+
+    } elseif {    $reusing
+	       && (!$state(-pipeline))
+	       && ($socketWrState($state(socketinfo)) eq "Wready")
+	       && ($socketRdState($state(socketinfo)) ne "Rready")
+    } {
+	# A read is queued or in progress, but not a write.  Cannot start the
+	# nonpipeline transaction, but must set socketWrState to prevent a
+	# pipelined request jumping the queue.
+	##Log "HTTP request for token $token is queued for nonpipeline use"
+	#Log re-use nonpipeline, GRANT delayed write access to $token in geturl
+
+	set socketWrState($state(socketinfo)) peNding
+	lappend socketWrQueue($state(socketinfo)) $token
+
+    } else {
+	if {$reusing && $state(-pipeline)} {
+	    #Log re-use pipelined, GRANT write access to $token in geturl
+	    set socketWrState($state(socketinfo)) $token
+
+	} elseif {$reusing} {
+	    # Cf tests above - both are ready.
+	    #Log re-use nonpipeline, GRANT r/w access to $token in geturl
+	    set socketRdState($state(socketinfo)) $token
+	    set socketWrState($state(socketinfo)) $token
+	}
+
+	# All (!$reusing) cases come here, and also some $reusing cases if the
+	# connection is ready.
+	#Log ---- $state(socketinfo) << conn to $token for HTTP request (a)
+	# Connect does its own fconfigure.
+	fileevent $sock writable \
+		[list http::Connect $token $proto $phost $srvurl]
+    }
+
+    # Wait for the connection to complete.
+    if {![info exists state(-command)]} {
+	# geturl does EVERYTHING asynchronously, so if the user
+	# calls it synchronously, we just do a wait here.
+	http::wait $token
+
+	if {![info exists state]} {
+	    # If we timed out then Finish has been called and the users
+	    # command callback may have cleaned up the token. If so we end up
+	    # here with nothing left to do.
+	    return $token
+	} elseif {$state(status) eq "error"} {
+	    # Something went wrong while trying to establish the connection.
+	    # Clean up after events and such, but DON'T call the command
+	    # callback (if available) because we're going to throw an
+	    # exception from here instead.
+	    set err [lindex $state(error) 0]
+	    cleanup $token
+	    return -code error $err
+	}
+    }
+    ##Log Leaving http::geturl - token $token
+    return $token
+}
+
+# http::Connected --
+#
+#	Callback used when the connection to the HTTP server is actually
+#	established.
+#
+# Arguments:
+#	token	State token.
+#	proto	What protocol (http, https, etc.) was used to connect.
+#	phost	Are we using keep-alive? Non-empty if yes.
+#	srvurl	Service-local URL that we're requesting
+# Results:
+#	None.
+
+proc http::Connected {token proto phost srvurl} {
+    variable http
+    variable urlTypes
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    variable $token
+    upvar 0 $token state
+    set tk [namespace tail $token]
+
+    if {$state(reusing) && (!$state(-pipeline)) && ($state(-timeout) > 0)} {
+	set state(after) [after $state(-timeout) \
+		[list http::reset $token timeout]]
+    }
+
+    # Set back the variables needed here.
+    set sock $state(sock)
+    set isQueryChannel [info exists state(-querychannel)]
+    set isQuery [info exists state(-query)]
+    set host [lindex [split $state(socketinfo) :] 0]
+    set port [lindex [split $state(socketinfo) :] 1]
+
+    set lower [string tolower $proto]
+    set defport [lindex $urlTypes($lower) 0]
+
+    # Send data in cr-lf format, but accept any line terminators.
+    # Initialisation to {auto *} now done in geturl, KeepSocket and DoneRequest.
+    # We are concerned here with the request (write) not the response (read).
+    lassign [fconfigure $sock -translation] trRead trWrite
+    fconfigure $sock -translation [list $trRead crlf] \
+		     -buffersize $state(-blocksize)
+
+    # The following is disallowed in safe interpreters, but the socket is
+    # already in non-blocking mode in that case.
+
+    catch {fconfigure $sock -blocking off}
+    set how GET
+    if {$isQuery} {
+	set state(querylength) [string length $state(-query)]
+	if {$state(querylength) > 0} {
+	    set how POST
+	    set contDone 0
+	} else {
+	    # There's no query data.
+	    unset state(-query)
+	    set isQuery 0
+	}
+    } elseif {$state(-validate)} {
+	set how HEAD
+    } elseif {$isQueryChannel} {
+	set how POST
+	# The query channel must be blocking for the async Write to
+	# work properly.
+	lassign [fconfigure $sock -translation] trRead trWrite
+	fconfigure $state(-querychannel) -blocking 1 \
+					 -translation [list $trRead binary]
+	set contDone 0
+    }
+    if {[info exists state(-method)] && ($state(-method) ne "")} {
+	set how $state(-method)
+    }
+    # We cannot handle chunked encodings with -handler, so force HTTP/1.0
+    # until we can manage this.
+    if {[info exists state(-handler)]} {
+	set state(-protocol) 1.0
+    }
+    set accept_types_seen 0
+
+    Log ^B$tk begin sending request - token $token
+
+    if {[catch {
+	set state(method) $how
+	puts $sock "$how $srvurl HTTP/$state(-protocol)"
+	if {[dict exists $state(-headers) Host]} {
+	    # Allow Host spoofing. [Bug 928154]
+	    puts $sock "Host: [dict get $state(-headers) Host]"
+	} elseif {$port == $defport} {
+	    # Don't add port in this case, to handle broken servers. [Bug
+	    # #504508]
+	    puts $sock "Host: $host"
+	} else {
+	    puts $sock "Host: $host:$port"
+	}
+	puts $sock "User-Agent: $http(-useragent)"
+	if {($state(-protocol) >= 1.0) && $state(-keepalive)} {
+	    # Send this header, because a 1.1 server is not compelled to treat
+	    # this as the default.
+	    puts $sock "Connection: keep-alive"
+	}
+	if {($state(-protocol) > 1.0) && !$state(-keepalive)} {
+	    puts $sock "Connection: close" ;# RFC2616 sec 8.1.2.1
+	}
+	if {[info exists phost] && ($phost ne "") && $state(-keepalive)} {
+	    puts $sock "Proxy-Connection: Keep-Alive"
+	}
+	set accept_encoding_seen 0
+	set content_type_seen 0
+	dict for {key value} $state(-headers) {
+	    set value [string map [list \n "" \r ""] $value]
+	    set key [string map {" " -} [string trim $key]]
+	    if {[string equal -nocase $key "host"]} {
+		continue
+	    }
+	    if {[string equal -nocase $key "accept-encoding"]} {
+		set accept_encoding_seen 1
+	    }
+	    if {[string equal -nocase $key "accept"]} {
+		set accept_types_seen 1
+	    }
+	    if {[string equal -nocase $key "content-type"]} {
+		set content_type_seen 1
+	    }
+	    if {[string equal -nocase $key "content-length"]} {
+		set contDone 1
+		set state(querylength) $value
+	    }
+	    if {[string length $key]} {
+		puts $sock "$key: $value"
+	    }
+	}
+	# Allow overriding the Accept header on a per-connection basis. Useful
+	# for working with REST services. [Bug c11a51c482]
+	if {!$accept_types_seen} {
+	    puts $sock "Accept: $state(accept-types)"
+	}
+	if {    (!$accept_encoding_seen)
+	     && (![info exists state(-handler)])
+	     && $http(-zip)
+	} {
+	    puts $sock "Accept-Encoding: gzip,deflate,compress"
+	}
+	if {$isQueryChannel && ($state(querylength) == 0)} {
+	    # Try to determine size of data in channel. If we cannot seek, the
+	    # surrounding catch will trap us
+
+	    set start [tell $state(-querychannel)]
+	    seek $state(-querychannel) 0 end
+	    set state(querylength) \
+		    [expr {[tell $state(-querychannel)] - $start}]
+	    seek $state(-querychannel) $start
+	}
+
+	# Flush the request header and set up the fileevent that will either
+	# push the POST data or read the response.
+	#
+	# fileevent note:
+	#
+	# It is possible to have both the read and write fileevents active at
+	# this point. The only scenario it seems to affect is a server that
+	# closes the connection without reading the POST data. (e.g., early
+	# versions TclHttpd in various error cases). Depending on the
+	# platform, the client may or may not be able to get the response from
+	# the server because of the error it will get trying to write the post
+	# data. Having both fileevents active changes the timing and the
+	# behavior, but no two platforms (among Solaris, Linux, and NT) behave
+	# the same, and none behave all that well in any case. Servers should
+	# always read their POST data if they expect the client to read their
+	# response.
+
+	if {$isQuery || $isQueryChannel} {
+	    # POST method.
+	    if {!$content_type_seen} {
+		puts $sock "Content-Type: $state(-type)"
+	    }
+	    if {!$contDone} {
+		puts $sock "Content-Length: $state(querylength)"
+	    }
+	    puts $sock ""
+	    flush $sock
+	    # Flush flushes the error in the https case with a bad handshake:
+	    # else the socket never becomes writable again, and hangs until
+	    # timeout (if any).
+
+	    lassign [fconfigure $sock -translation] trRead trWrite
+	    fconfigure $sock -translation [list $trRead binary]
+	    fileevent $sock writable [list http::Write $token]
+	    # The http::Write command decides when to make the socket readable,
+	    # using the same test as the GET/HEAD case below.
+	} else {
+	    # GET or HEAD method.
+	    if {    (![catch {fileevent $sock readable} binding])
+		 && ($binding eq [list http::CheckEof $sock])
+	    } {
+		# Remove the "fileevent readable" binding of an idle persistent
+		# socket to http::CheckEof.  We can no longer treat bytes
+		# received as junk. The server might still time out and
+		# half-close the socket if it has not yet received the first
+		# "puts".
+		fileevent $sock readable {}
+	    }
+	    puts $sock ""
+	    flush $sock
+	    Log ^C$tk end sending request - token $token
+	    # End of writing (GET/HEAD methods).  The request has been sent.
+
+	    DoneRequest $token
+	}
+
+    } err]} {
+	# The socket probably was never connected, OR the connection dropped
+	# later, OR https handshake error, which may be discovered as late as
+	# the "flush" command above...
+	Log "WARNING - if testing, pay special attention to this\
+		case (GI) which is seldom executed - token $token"
+	if {[info exists state(reusing)] && $state(reusing)} {
+	    # The socket was closed at the server end, and closed at
+	    # this end by http::CheckEof.
+    	    if {[TestForReplay $token write $err a]} {
+		return
+	    } else {
+		Finish $token {failed to re-use socket}
+	    }
+
+	    # else:
+	    # This is NOT a persistent socket that has been closed since its
+	    # last use.
+	    # If any other requests are in flight or pipelined/queued, they will
+	    # be discarded.
+	} elseif {$state(status) eq ""} {
+	    # ...https handshake errors come here.
+	    set msg [registerError $sock]
+	    registerError $sock {}
+	    if {$msg eq {}} {
+		set msg {failed to use socket}
+	    }
+	    Finish $token $msg
+	} elseif {$state(status) ne "error"} {
+	    Finish $token $err
+	}
+    }
+}
+
+# http::registerError
+#
+#	Called (for example when processing TclTLS activity) to register
+#	an error for a connection on a specific socket.  This helps
+#	http::Connected to deliver meaningful error messages, e.g. when a TLS
+#	certificate fails verification.
+#
+#	Usage: http::registerError socket ?newValue?
+#
+#	"set" semantics, except that a "get" (a call without a new value) for a
+#	non-existent socket returns {}, not an error.
+
+proc http::registerError {sock args} {
+    variable registeredErrors
+
+    if {    ([llength $args] == 0)
+	 && (![info exists registeredErrors($sock)])
+    } {
+	return
+    } elseif {    ([llength $args] == 1)
+	       && ([lindex $args 0] eq {})
+    } {
+	unset -nocomplain registeredErrors($sock)
+	return
+    }
+    set registeredErrors($sock) {*}$args
+}
+
+# http::DoneRequest --
+#
+#	Command called when a request has been sent.  It will arrange the
+#	next request and/or response as appropriate.
+#
+#	If this command is called when $socketClosing(*), the request $token
+#	that calls it must be pipelined and destined to fail.
+
+proc http::DoneRequest {token} {
+    variable http
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    variable $token
+    upvar 0 $token state
+    set tk [namespace tail $token]
+    set sock $state(sock)
+
+    # If pipelined, connect the next HTTP request to the socket.
+    if {$state(reusing) && $state(-pipeline)} {
+	# Enable next token (if any) to write.
+	# The value "Wready" is set only here, and
+	# in http::Event after reading the response-headers of a
+	# non-reusing transaction.
+	# Previous value is $token. It cannot be pending.
+	set socketWrState($state(socketinfo)) Wready
+
+	# Now ready to write the next pipelined request (if any).
+	http::NextPipelinedWrite $token
+    } else {
+	# If pipelined, this is the first transaction on this socket.  We wait
+	# for the response headers to discover whether the connection is
+	# persistent.  (If this is not done and the connection is not
+	# persistent, we SHOULD retry and then MUST NOT pipeline before knowing
+	# that we have a persistent connection
+	# (rfc2616 8.1.2.2)).
+    }
+
+    # Connect to receive the response, unless the socket is pipelined
+    # and another response is being sent.
+    # This code block is separate from the code below because there are
+    # cases where socketRdState already has the value $token.
+    if {    $state(-keepalive)
+	 && $state(-pipeline)
+	 && [info exists socketRdState($state(socketinfo))]
+	 && ($socketRdState($state(socketinfo)) eq "Rready")
+    } {
+	#Log pipelined, GRANT read access to $token in Connected
+	set socketRdState($state(socketinfo)) $token
+    }
+
+    if {    $state(-keepalive)
+	 && $state(-pipeline)
+	 && [info exists socketRdState($state(socketinfo))]
+	 && ($socketRdState($state(socketinfo)) ne $token)
+    } {
+	# Do not read from the socket until it is ready.
+	##Log "HTTP response for token $token is queued for pipelined use"
+	# If $socketClosing(*), then the caller will be a pipelined write and
+	# execution will come here.
+	# This token has already been recorded as "in flight" for writing.
+	# When the socket is closed, the read queue will be cleared in
+	# CloseQueuedQueries and so the "lappend" here has no effect.
+	lappend socketRdQueue($state(socketinfo)) $token
+    } else {
+	# In the pipelined case, connection for reading depends on the
+	# value of socketRdState.
+	# In the nonpipeline case, connection for reading always occurs.
+	ReceiveResponse $token
+    }
+}
+
+# http::ReceiveResponse
+#
+#	Connects token to its socket for reading.
+
+proc http::ReceiveResponse {token} {
+    variable $token
+    upvar 0 $token state
+    set tk [namespace tail $token]
+    set sock $state(sock)
+
+    #Log ---- $state(socketinfo) >> conn to $token for HTTP response
+    lassign [fconfigure $sock -translation] trRead trWrite
+    fconfigure $sock -translation [list auto $trWrite] \
+		     -buffersize $state(-blocksize)
+    Log ^D$tk begin receiving response - token $token
+
+    coroutine ${token}EventCoroutine http::Event $sock $token
+    fileevent $sock readable ${token}EventCoroutine
+}
+
+# http::NextPipelinedWrite
+#
+# - Connecting a socket to a token for writing is done by this command and by
+#   command KeepSocket.
+# - If another request has a pipelined write scheduled for $token's socket,
+#   and if the socket is ready to accept it, connect the write and update
+#   the queue accordingly.
+# - This command is called from http::DoneRequest and http::Event,
+#   IF $state(-pipeline) AND (the current transfer has reached the point at
+#   which the socket is ready for the next request to be written).
+# - This command is called when a token has write access and is pipelined and
+#   keep-alive, and sets socketWrState to Wready.
+# - The command need not consider the case where socketWrState is set to a token
+#   that does not yet have write access.  Such a token is waiting for Rready,
+#   and the assignment of the connection to the token will be done elsewhere (in
+#   http::KeepSocket).
+# - This command cannot be called after socketWrState has been set to a
+#   "pending" token value (that is then overwritten by the caller), because that
+#   value is set by this command when it is called by an earlier token when it
+#   relinquishes its write access, and the pending token is always the next in
+#   line to write.
+
+proc http::NextPipelinedWrite {token} {
+    variable http
+    variable socketRdState
+    variable socketWrState
+    variable socketWrQueue
+    variable socketClosing
+    variable $token
+    upvar 0 $token state
+    set connId $state(socketinfo)
+
+    if {    [info exists socketClosing($connId)]
+	 && $socketClosing($connId)
+    } {
+	# socketClosing(*) is set because the server has sent a
+	# "Connection: close" header.
+	# Behave as if the queues are empty - so do nothing.
+    } elseif {    $state(-pipeline)
+	 && [info exists socketWrState($connId)]
+	 && ($socketWrState($connId) eq "Wready")
+
+	 && [info exists socketWrQueue($connId)]
+	 && [llength $socketWrQueue($connId)]
+	 && ([set token2 [lindex $socketWrQueue($connId) 0]
+	      set ${token2}(-pipeline)
+	     ]
+	    )
+    } {
+	# - The usual case for a pipelined connection, ready for a new request.
+	#Log pipelined, GRANT write access to $token2 in NextPipelinedWrite
+	set conn [set ${token2}(tmpConnArgs)]
+	set socketWrState($connId) $token2
+	set socketWrQueue($connId) [lrange $socketWrQueue($connId) 1 end]
+	# Connect does its own fconfigure.
+	fileevent $state(sock) writable [list http::Connect $token2 {*}$conn]
+	#Log ---- $connId << conn to $token2 for HTTP request (b)
+
+	# In the tests below, the next request will be nonpipeline.
+    } elseif {    $state(-pipeline)
+	       && [info exists socketWrState($connId)]
+	       && ($socketWrState($connId) eq "Wready")
+
+	       && [info exists socketWrQueue($connId)]
+	       && [llength $socketWrQueue($connId)]
+	       && (![ set token3 [lindex $socketWrQueue($connId) 0]
+		      set ${token3}(-pipeline)
+		    ]
+		  )
+
+	       && [info exists socketRdState($connId)]
+	       && ($socketRdState($connId) eq "Rready")
+    } {
+	# The case in which the next request will be non-pipelined, and the read
+	# and write queues is ready: which is the condition for a non-pipelined
+	# write.
+	variable $token3
+	upvar 0 $token3 state3
+	set conn [set ${token3}(tmpConnArgs)]
+	#Log nonpipeline, GRANT r/w access to $token3 in NextPipelinedWrite
+	set socketRdState($connId) $token3
+	set socketWrState($connId) $token3
+	set socketWrQueue($connId) [lrange $socketWrQueue($connId) 1 end]
+	# Connect does its own fconfigure.
+	fileevent $state(sock) writable [list http::Connect $token3 {*}$conn]
+	#Log ---- $state(sock) << conn to $token3 for HTTP request (c)
+
+    } elseif {    $state(-pipeline)
+	 && [info exists socketWrState($connId)]
+	 && ($socketWrState($connId) eq "Wready")
+
+	 && [info exists socketWrQueue($connId)]
+	 && [llength $socketWrQueue($connId)]
+	 && (![set token2 [lindex $socketWrQueue($connId) 0]
+	      set ${token2}(-pipeline)
+	     ]
+	    )
+    } {
+	# - The case in which the next request will be non-pipelined, but the
+	#   read queue is NOT ready.
+	# - A read is queued or in progress, but not a write.  Cannot start the
+	#   nonpipeline transaction, but must set socketWrState to prevent a new
+	#   pipelined request (in http::geturl) jumping the queue.
+	# - Because socketWrState($connId) is not set to Wready, the assignment
+	#   of the connection to $token2 will be done elsewhere - by command
+	#   http::KeepSocket when $socketRdState($connId) is set to "Rready".
+
+	#Log re-use nonpipeline, GRANT delayed write access to $token in NextP..
+	set socketWrState($connId) peNding
+    }
+}
+
+# http::CancelReadPipeline
+#
+#	Cancel pipelined responses on a closing "Keep-Alive" socket.
+#
+#	- Called by a variable trace on "unset socketRdState($connId)".
+#	- The variable relates to a Keep-Alive socket, which has been closed.
+#	- Cancels all pipelined responses. The requests have been sent,
+#	  the responses have not yet been received.
+#	- This is a hard cancel that ends each transaction with error status,
+#	  and closes the connection. Do not use it if you want to replay failed
+#	  transactions.
+#	- N.B. Always delete ::http::socketRdState($connId) before deleting
+#	  ::http::socketRdQueue($connId), or this command will do nothing.
+#
+# Arguments
+#	As for a trace command on a variable.
+
+proc http::CancelReadPipeline {name1 connId op} {
+    variable socketRdQueue
+    ##Log CancelReadPipeline $name1 $connId $op
+    if {[info exists socketRdQueue($connId)]} {
+	set msg {the connection was closed by CancelReadPipeline}
+	foreach token $socketRdQueue($connId) {
+	    set tk [namespace tail $token]
+	    Log ^X$tk end of response "($msg)" - token $token
+	    set ${token}(status) eof
+	    Finish $token ;#$msg
+	}
+	set socketRdQueue($connId) {}
+    }
+}
+
+# http::CancelWritePipeline
+#
+#	Cancel queued events on a closing "Keep-Alive" socket.
+#
+#	- Called by a variable trace on "unset socketWrState($connId)".
+#	- The variable relates to a Keep-Alive socket, which has been closed.
+#	- In pipelined or nonpipeline case: cancels all queued requests.  The
+#	  requests have not yet been sent, the responses are not due.
+#	- This is a hard cancel that ends each transaction with error status,
+#	  and closes the connection. Do not use it if you want to replay failed
+#	  transactions.
+#	- N.B. Always delete ::http::socketWrState($connId) before deleting
+#	  ::http::socketWrQueue($connId), or this command will do nothing.
+#
+# Arguments
+#	As for a trace command on a variable.
+
+proc http::CancelWritePipeline {name1 connId op} {
+    variable socketWrQueue
+
+    ##Log CancelWritePipeline $name1 $connId $op
+    if {[info exists socketWrQueue($connId)]} {
+	set msg {the connection was closed by CancelWritePipeline}
+	foreach token $socketWrQueue($connId) {
+	    set tk [namespace tail $token]
+	    Log ^X$tk end of response "($msg)" - token $token
+	    set ${token}(status) eof
+	    Finish $token ;#$msg
+	}
+	set socketWrQueue($connId) {}
+    }
+}
+
+# http::ReplayIfDead --
+#
+# - A query on a re-used persistent socket failed at the earliest opportunity,
+#   because the socket had been closed by the server.  Keep the token, tidy up,
+#   and try to connect on a fresh socket.
+# - The connection is monitored for eof by the command http::CheckEof.  Thus
+#   http::ReplayIfDead is needed only when a server event (half-closing an
+#   apparently idle connection), and a client event (sending a request) occur at
+#   almost the same time, and neither client nor server detects the other's
+#   action before performing its own (an "asynchronous close event").
+# - To simplify testing of http::ReplayIfDead, set TEST_EOF 1 in
+#   http::KeepSocket, and then http::ReplayIfDead will be called if http::geturl
+#   is called at any time after the server timeout.
+#
+# Arguments:
+#	token	Connection token.
+#
+# Side Effects:
+#	Use the same token, but try to open a new socket.
+
+proc http::ReplayIfDead {tokenArg doing} {
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    variable $tokenArg
+    upvar 0 $tokenArg stateArg
+
+    Log running http::ReplayIfDead for $tokenArg $doing
+
+    # 1. Merge the tokens for transactions in flight, the read (response) queue,
+    #    and the write (request) queue.
+
+    set InFlightR {}
+    set InFlightW {}
+
+    # Obtain the tokens for transactions in flight.
+    if {$stateArg(-pipeline)} {
+	# Two transactions may be in flight.  The "read" transaction was first.
+	# It is unlikely that the server would close the socket if a response
+	# was pending; however, an earlier request (as well as the present
+	# request) may have been sent and ignored if the socket was half-closed
+	# by the server.
+
+	if {    [info exists socketRdState($stateArg(socketinfo))]
+	     && ($socketRdState($stateArg(socketinfo)) ne "Rready")
+	} {
+	    lappend InFlightR $socketRdState($stateArg(socketinfo))
+	} elseif {($doing eq "read")} {
+	    lappend InFlightR $tokenArg
+	}
+
+	if {    [info exists socketWrState($stateArg(socketinfo))]
+	     && $socketWrState($stateArg(socketinfo)) ni {Wready peNding}
+	} {
+	    lappend InFlightW $socketWrState($stateArg(socketinfo))
+	} elseif {($doing eq "write")} {
+	    lappend InFlightW $tokenArg
+	}
+
+	# Report any inconsistency of $tokenArg with socket*state.
+	if {    ($doing eq "read")
+	     && [info exists socketRdState($stateArg(socketinfo))]
+	     && ($tokenArg ne $socketRdState($stateArg(socketinfo)))
+	} {
+	    Log WARNING - ReplayIfDead pipelined tokenArg $tokenArg $doing \
+		    ne socketRdState($stateArg(socketinfo)) \
+		      $socketRdState($stateArg(socketinfo))
+
+	} elseif {
+		($doing eq "write")
+	     && [info exists socketWrState($stateArg(socketinfo))]
+	     && ($tokenArg ne $socketWrState($stateArg(socketinfo)))
+	} {
+	    Log WARNING - ReplayIfDead pipelined tokenArg $tokenArg $doing \
+		    ne socketWrState($stateArg(socketinfo)) \
+		      $socketWrState($stateArg(socketinfo))
+	}
+    } else {
+	# One transaction should be in flight.
+	# socketRdState, socketWrQueue are used.
+	# socketRdQueue should be empty.
+
+	# Report any inconsistency of $tokenArg with socket*state.
+	if {$tokenArg ne $socketRdState($stateArg(socketinfo))} {
+	    Log WARNING - ReplayIfDead nonpipeline tokenArg $tokenArg $doing \
+		    ne socketRdState($stateArg(socketinfo)) \
+		      $socketRdState($stateArg(socketinfo))
+	}
+
+	# Report the inconsistency that socketRdQueue is non-empty.
+	if {    [info exists socketRdQueue($stateArg(socketinfo))]
+	     && ($socketRdQueue($stateArg(socketinfo)) ne {})
+	} {
+	    Log WARNING - ReplayIfDead nonpipeline tokenArg $tokenArg $doing \
+		    has read queue socketRdQueue($stateArg(socketinfo)) \
+		    $socketRdQueue($stateArg(socketinfo)) ne {}
+	}
+
+	lappend InFlightW $socketRdState($stateArg(socketinfo))
+	set socketRdQueue($stateArg(socketinfo)) {}
+    }
+
+    set newQueue {}
+    lappend newQueue {*}$InFlightR
+    lappend newQueue {*}$socketRdQueue($stateArg(socketinfo))
+    lappend newQueue {*}$InFlightW
+    lappend newQueue {*}$socketWrQueue($stateArg(socketinfo))
+
+
+    # 2. Tidy up tokenArg.  This is a cut-down form of Finish/CloseSocket.
+    #    Do not change state(status).
+    #    No need to after cancel stateArg(after) - either this is done in
+    #    ReplayCore/ReInit, or Finish is called.
+
+    catch {close $stateArg(sock)}
+
+    # 2a. Tidy the tokens in the queues - this is done in ReplayCore/ReInit.
+    # - Transactions, if any, that are awaiting responses cannot be completed.
+    #   They are listed for re-sending in newQueue.
+    # - All tokens are preserved for re-use by ReplayCore, and their variables
+    #   will be re-initialised by calls to ReInit.
+    # - The relevant element of socketMapping, socketRdState, socketWrState,
+    #   socketRdQueue, socketWrQueue, socketClosing, socketPlayCmd will be set
+    #   to new values in ReplayCore.
+
+    ReplayCore $newQueue
+}
+
+# http::ReplayIfClose --
+#
+#	A request on a socket that was previously "Connection: keep-alive" has
+#	received a "Connection: close" response header.  The server supplies
+#	that response correctly, but any later requests already queued on this
+#	connection will be lost when the socket closes.
+#
+#	This command takes arguments that represent the socketWrState,
+#	socketRdQueue and socketWrQueue for this connection.  The socketRdState
+#	is not needed because the server responds in full to the request that
+#	received the "Connection: close" response header.
+#
+#	Existing request tokens $token (::http::$n) are preserved.  The caller
+#	will be unaware that the request was processed this way.
+
+proc http::ReplayIfClose {Wstate Rqueue Wqueue} {
+    Log running http::ReplayIfClose for $Wstate $Rqueue $Wqueue
+
+    if {$Wstate in $Rqueue || $Wstate in $Wqueue} {
+	Log WARNING duplicate token in http::ReplayIfClose - token $Wstate
+	set Wstate Wready
+    }
+
+    # 1. Create newQueue
+    set InFlightW {}
+    if {$Wstate ni {Wready peNding}} {
+	lappend InFlightW $Wstate
+    }
+
+    set newQueue {}
+    lappend newQueue {*}$Rqueue
+    lappend newQueue {*}$InFlightW
+    lappend newQueue {*}$Wqueue
+
+    # 2. Cleanup - none needed, done by the caller.
+
+    ReplayCore $newQueue
+}
+
+# http::ReInit --
+#
+#	Command to restore a token's state to a condition that
+#	makes it ready to replay a request.
+#
+#	Command http::geturl stores extra state in state(tmp*) so
+#	we don't need to do the argument processing again.
+#
+#	The caller must:
+#	- Set state(reusing) and state(sock) to their new values after calling
+#	  this command.
+#	- Unset state(tmpState), state(tmpOpenCmd) if future calls to ReplayCore
+#	  or ReInit are inappropriate for this token. Typically only one retry
+#	  is allowed.
+#	The caller may also unset state(tmpConnArgs) if this value (and the
+#	token) will be used immediately.  The value is needed by tokens that
+#	will be stored in a queue.
+#
+# Arguments:
+#	token	Connection token.
+#
+# Return Value: (boolean) true iff the re-initialisation was successful.
+
+proc http::ReInit {token} {
+    variable $token
+    upvar 0 $token state
+
+    if {!(
+	      [info exists state(tmpState)]
+	   && [info exists state(tmpOpenCmd)]
+	   && [info exists state(tmpConnArgs)]
+	 )
+    } {
+	Log FAILED in http::ReInit via ReplayCore - NO tmp vars for $token
+	return 0
+    }
+
+    if {[info exists state(after)]} {
+	after cancel $state(after)
+	unset state(after)
+    }
+
+    # Don't alter state(status) - this would trigger http::wait if it is in use.
+    set tmpState    $state(tmpState)
+    set tmpOpenCmd  $state(tmpOpenCmd)
+    set tmpConnArgs $state(tmpConnArgs)
+    foreach name [array names state] {
+	if {$name ne "status"} {
+	    unset state($name)
+	}
+    }
+
+    # Don't alter state(status).
+    # Restore state(tmp*) - the caller may decide to unset them.
+    # Restore state(tmpConnArgs) which is needed for connection.
+    # state(tmpState), state(tmpOpenCmd) are needed only for retries.
+
+    dict unset tmpState status
+    array set state $tmpState
+    set state(tmpState)    $tmpState
+    set state(tmpOpenCmd)  $tmpOpenCmd
+    set state(tmpConnArgs) $tmpConnArgs
+
+    return 1
+}
+
+# http::ReplayCore --
+#
+#	Command to replay a list of requests, using existing connection tokens.
+#
+#	Abstracted from http::geturl which stores extra state in state(tmp*) so
+#	we don't need to do the argument processing again.
+#
+# Arguments:
+#	newQueue	List of connection tokens.
+#
+# Side Effects:
+#	Use existing tokens, but try to open a new socket.
+
+proc http::ReplayCore {newQueue} {
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    if {[llength $newQueue] == 0} {
+	# Nothing to do.
+	return
+    }
+
+    ##Log running ReplayCore for {*}$newQueue
+    set newToken [lindex $newQueue 0]
+    set newQueue [lrange $newQueue 1 end]
+
+    # 3. Use newToken, and restore its values of state(*).  Do not restore
+    #    elements tmp* - we try again only once.
+
+    set token $newToken
+    variable $token
+    upvar 0 $token state
+
+    if {![ReInit $token]} {
+	Log FAILED in http::ReplayCore - NO tmp vars
+	Finish $token {cannot send this request again}
+	return
+    }
+
+    set tmpState    $state(tmpState)
+    set tmpOpenCmd  $state(tmpOpenCmd)
+    set tmpConnArgs $state(tmpConnArgs)
+    unset state(tmpState)
+    unset state(tmpOpenCmd)
+    unset state(tmpConnArgs)
+
+    set state(reusing) 0
+
+    if {$state(-timeout) > 0} {
+	set resetCmd [list http::reset $token timeout]
+	set state(after) [after $state(-timeout) $resetCmd]
+    }
+
+    set pre [clock milliseconds]
+    ##Log pre socket opened, - token $token
+    ##Log $tmpOpenCmd - token $token
+    # 4. Open a socket.
+    if {[catch {eval $tmpOpenCmd} sock]} {
+	# Something went wrong while trying to establish the connection.
+	Log FAILED - $sock
+	set state(sock) NONE
+	Finish $token $sock
+	return
+    }
+    ##Log post socket opened, - token $token
+    set delay [expr {[clock milliseconds] - $pre}]
+    if {$delay > 3000} {
+	Log socket delay $delay - token $token
+    }
+    # Command [socket] is called with -async, but takes 5s to 5.1s to return,
+    # with probability of order 1 in 10,000.  This may be a bizarre scheduling
+    # issue with my (KJN's) system (Fedora Linux).
+    # This does not cause a problem (unless the request times out when this
+    # command returns).
+
+    # 5. Configure the persistent socket data.
+    if {$state(-keepalive)} {
+	set socketMapping($state(socketinfo)) $sock
+
+	if {![info exists socketRdState($state(socketinfo))]} {
+	    set socketRdState($state(socketinfo)) {}
+	    set varName ::http::socketRdState($state(socketinfo))
+	    trace add variable $varName unset ::http::CancelReadPipeline
+	}
+
+	if {![info exists socketWrState($state(socketinfo))]} {
+	    set socketWrState($state(socketinfo)) {}
+	    set varName ::http::socketWrState($state(socketinfo))
+	    trace add variable $varName unset ::http::CancelWritePipeline
+	}
+
+	if {$state(-pipeline)} {
+	    #Log new, init for pipelined, GRANT write acc to $token ReplayCore
+	    set socketRdState($state(socketinfo)) $token
+	    set socketWrState($state(socketinfo)) $token
+	} else {
+	    #Log new, init for nonpipeline, GRANT r/w acc to $token ReplayCore
+	    set socketRdState($state(socketinfo)) $token
+	    set socketWrState($state(socketinfo)) $token
+	}
+
+	set socketRdQueue($state(socketinfo)) {}
+	set socketWrQueue($state(socketinfo)) $newQueue
+	set socketClosing($state(socketinfo)) 0
+	set socketPlayCmd($state(socketinfo)) {ReplayIfClose Wready {} {}}
+    }
+
+    ##Log pre newQueue ReInit, - token $token
+    # 6. Configure sockets in the queue.
+    foreach tok $newQueue {
+	if {[ReInit $tok]} {
+	    set ${tok}(reusing) 1
+	    set ${tok}(sock) $sock
+	} else {
+	    set ${tok}(reusing) 1
+	    set ${tok}(sock) NONE
+	    Finish $token {cannot send this request again}
+	}
+    }
+
+    # 7. Configure the socket for newToken to send a request.
+    set state(sock) $sock
+    Log "Using $sock for $state(socketinfo) - token $token" \
+	[expr {$state(-keepalive)?"keepalive":""}]
+
+    # Initialisation of a new socket.
+    ##Log socket opened, now fconfigure - token $token
+    fconfigure $sock -translation {auto crlf} -buffersize $state(-blocksize)
+    ##Log socket opened, DONE fconfigure - token $token
+
+    # Connect does its own fconfigure.
+    fileevent $sock writable [list http::Connect $token {*}$tmpConnArgs]
+    #Log ---- $sock << conn to $token for HTTP request (e)
+}
+
+# Data access functions:
+# Data - the URL data
+# Status - the transaction status: ok, reset, eof, timeout, error
+# Code - the HTTP transaction code, e.g., 200
+# Size - the size of the URL data
+
+proc http::data {token} {
+    variable $token
+    upvar 0 $token state
+    return $state(body)
+}
+proc http::status {token} {
+    if {![info exists $token]} {
+	return "error"
+    }
+    variable $token
+    upvar 0 $token state
+    return $state(status)
+}
+proc http::code {token} {
+    variable $token
+    upvar 0 $token state
+    return $state(http)
+}
+proc http::ncode {token} {
+    variable $token
+    upvar 0 $token state
+    if {[regexp {[0-9]{3}} $state(http) numeric_code]} {
+	return $numeric_code
+    } else {
+	return $state(http)
+    }
+}
+proc http::size {token} {
+    variable $token
+    upvar 0 $token state
+    return $state(currentsize)
+}
+proc http::meta {token} {
+    variable $token
+    upvar 0 $token state
+    return $state(meta)
+}
+proc http::error {token} {
+    variable $token
+    upvar 0 $token state
+    if {[info exists state(error)]} {
+	return $state(error)
+    }
+    return ""
+}
+
+# http::cleanup
+#
+#	Garbage collect the state associated with a transaction
+#
+# Arguments
+#	token	The token returned from http::geturl
+#
+# Side Effects
+#	unsets the state array
+
+proc http::cleanup {token} {
+    variable $token
+    upvar 0 $token state
+    if {[info commands ${token}EventCoroutine] ne {}} {
+	rename ${token}EventCoroutine {}
+    }
+    if {[info exists state(after)]} {
+	after cancel $state(after)
+	unset state(after)
+    }
+    if {[info exists state]} {
+	unset state
+    }
+}
+
+# http::Connect
+#
+#	This callback is made when an asyncronous connection completes.
+#
+# Arguments
+#	token	The token returned from http::geturl
+#
+# Side Effects
+#	Sets the status of the connection, which unblocks
+# 	the waiting geturl call
+
+proc http::Connect {token proto phost srvurl} {
+    variable $token
+    upvar 0 $token state
+    set tk [namespace tail $token]
+    set err "due to unexpected EOF"
+    if {
+	[eof $state(sock)] ||
+	[set err [fconfigure $state(sock) -error]] ne ""
+    } {
+	Log "WARNING - if testing, pay special attention to this\
+		case (GJ) which is seldom executed - token $token"
+	if {[info exists state(reusing)] && $state(reusing)} {
+	    # The socket was closed at the server end, and closed at
+	    # this end by http::CheckEof.
+	    if {[TestForReplay $token write $err b]} {
+		return
+	    }
+
+	    # else:
+	    # This is NOT a persistent socket that has been closed since its
+	    # last use.
+	    # If any other requests are in flight or pipelined/queued, they will
+	    # be discarded.
+	}
+	Finish $token "connect failed $err"
+    } else {
+	set state(state) connecting
+	fileevent $state(sock) writable {}
+	::http::Connected $token $proto $phost $srvurl
+    }
+}
+
+# http::Write
+#
+#	Write POST query data to the socket
+#
+# Arguments
+#	token	The token for the connection
+#
+# Side Effects
+#	Write the socket and handle callbacks.
+
+proc http::Write {token} {
+    variable http
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    variable $token
+    upvar 0 $token state
+    set tk [namespace tail $token]
+    set sock $state(sock)
+
+    # Output a block.  Tcl will buffer this if the socket blocks
+    set done 0
+    if {[catch {
+	# Catch I/O errors on dead sockets
+
+	if {[info exists state(-query)]} {
+	    # Chop up large query strings so queryprogress callback can give
+	    # smooth feedback.
+	    if {    $state(queryoffset) + $state(-queryblocksize)
+		 >= $state(querylength)
+	    } {
+		# This will be the last puts for the request-body.
+		if {    (![catch {fileevent $sock readable} binding])
+		     && ($binding eq [list http::CheckEof $sock])
+		} {
+		    # Remove the "fileevent readable" binding of an idle
+		    # persistent socket to http::CheckEof.  We can no longer
+		    # treat bytes received as junk. The server might still time
+		    # out and half-close the socket if it has not yet received
+		    # the first "puts".
+		    fileevent $sock readable {}
+		}
+	    }
+	    puts -nonewline $sock \
+		[string range $state(-query) $state(queryoffset) \
+		     [expr {$state(queryoffset) + $state(-queryblocksize) - 1}]]
+	    incr state(queryoffset) $state(-queryblocksize)
+	    if {$state(queryoffset) >= $state(querylength)} {
+		set state(queryoffset) $state(querylength)
+		set done 1
+	    }
+	} else {
+	    # Copy blocks from the query channel
+
+	    set outStr [read $state(-querychannel) $state(-queryblocksize)]
+	    if {[eof $state(-querychannel)]} {
+		# This will be the last puts for the request-body.
+		if {    (![catch {fileevent $sock readable} binding])
+		     && ($binding eq [list http::CheckEof $sock])
+		} {
+		    # Remove the "fileevent readable" binding of an idle
+		    # persistent socket to http::CheckEof.  We can no longer
+		    # treat bytes received as junk. The server might still time
+		    # out and half-close the socket if it has not yet received
+		    # the first "puts".
+		    fileevent $sock readable {}
+		}
+	    }
+	    puts -nonewline $sock $outStr
+	    incr state(queryoffset) [string length $outStr]
+	    if {[eof $state(-querychannel)]} {
+		set done 1
+	    }
+	}
+    } err]} {
+	# Do not call Finish here, but instead let the read half of the socket
+	# process whatever server reply there is to get.
+
+	set state(posterror) $err
+	set done 1
+    }
+
+    if {$done} {
+	catch {flush $sock}
+	fileevent $sock writable {}
+	Log ^C$tk end sending request - token $token
+	# End of writing (POST method).  The request has been sent.
+
+	DoneRequest $token
+    }
+
+    # Callback to the client after we've completely handled everything.
+
+    if {[string length $state(-queryprogress)]} {
+	eval $state(-queryprogress) \
+	    [list $token $state(querylength) $state(queryoffset)]
+    }
+}
+
+# http::Event
+#
+#	Handle input on the socket. This command is the core of
+#	the coroutine commands ${token}EventCoroutine that are
+#	bound to "fileevent $sock readable" and process input.
+#
+# Arguments
+#	sock	The socket receiving input.
+#	token	The token returned from http::geturl
+#
+# Side Effects
+#	Read the socket and handle callbacks.
+
+proc http::Event {sock token} {
+    variable http
+    variable socketMapping
+    variable socketRdState
+    variable socketWrState
+    variable socketRdQueue
+    variable socketWrQueue
+    variable socketClosing
+    variable socketPlayCmd
+
+    variable $token
+    upvar 0 $token state
+    set tk [namespace tail $token]
+    while 1 {
+	yield
+	##Log Event call - token $token
+
+	if {![info exists state]} {
+	    Log "Event $sock with invalid token '$token' - remote close?"
+	    if {![eof $sock]} {
+		if {[set d [read $sock]] ne ""} {
+		    Log "WARNING: additional data left on closed socket\
+			    - token $token"
+		}
+	    }
+	    Log ^X$tk end of response (token error) - token $token
+	    CloseSocket $sock
+	    return
+	}
+	if {$state(state) eq "connecting"} {
+	    ##Log - connecting - token $token
+	    if {    $state(reusing)
+		 && $state(-pipeline)
+		 && ($state(-timeout) > 0)
+		 && (![info exists state(after)])
+	    } {
+		set state(after) [after $state(-timeout) \
+			[list http::reset $token timeout]]
+	    }
+
+	    if {[catch {gets $sock state(http)} nsl]} {
+		Log "WARNING - if testing, pay special attention to this\
+			case (GK) which is seldom executed - token $token"
+		if {[info exists state(reusing)] && $state(reusing)} {
+		    # The socket was closed at the server end, and closed at
+		    # this end by http::CheckEof.
+
+		    if {[TestForReplay $token read $nsl c]} {
+			return
+		    }
+
+		    # else:
+		    # This is NOT a persistent socket that has been closed since
+		    # its last use.
+		    # If any other requests are in flight or pipelined/queued,
+		    # they will be discarded.
+		} else {
+		    Log ^X$tk end of response (error) - token $token
+		    Finish $token $nsl
+		    return
+		}
+	    } elseif {$nsl >= 0} {
+		##Log - connecting 1 - token $token
+		set state(state) "header"
+	    } elseif {    [eof $sock]
+		       && [info exists state(reusing)]
+		       && $state(reusing)
+	    } {
+		# The socket was closed at the server end, and we didn't notice.
+		# This is the first read - where the closure is usually first
+		# detected.
+
+		if {[TestForReplay $token read {} d]} {
+		    return
+		}
+
+		# else:
+		# This is NOT a persistent socket that has been closed since its
+		# last use.
+		# If any other requests are in flight or pipelined/queued, they
+		# will be discarded.
+	    }
+	} elseif {$state(state) eq "header"} {
+	    if {[catch {gets $sock line} nhl]} {
+		##Log header failed - token $token
+		Log ^X$tk end of response (error) - token $token
+		Finish $token $nhl
+		return
+	    } elseif {$nhl == 0} {
+		##Log header done - token $token
+		Log ^E$tk end of response headers - token $token
+		# We have now read all headers
+		# We ignore HTTP/1.1 100 Continue returns. RFC2616 sec 8.2.3
+		if {    ($state(http) == "")
+		     || ([regexp {^\S+\s(\d+)} $state(http) {} x] && $x == 100)
+		} {
+		    set state(state) "connecting"
+		    continue
+		    # This was a "return" in the pre-coroutine code.
+		}
+
+		if {    ([info exists state(connection)])
+		     && ([info exists socketMapping($state(socketinfo))])
+		     && ($state(connection) eq "keep-alive")
+		     && ($state(-keepalive))
+		     && (!$state(reusing))
+		     && ($state(-pipeline))
+		} {
+		    # Response headers received for first request on a
+		    # persistent socket.  Now ready for pipelined writes (if
+		    # any).
+		    # Previous value is $token. It cannot be "pending".
+		    set socketWrState($state(socketinfo)) Wready
+		    http::NextPipelinedWrite $token
+		}
+
+		# Once a "close" has been signaled, the client MUST NOT send any
+		# more requests on that connection.
+		#
+		# If either the client or the server sends the "close" token in
+		# the Connection header, that request becomes the last one for
+		# the connection.
+
+		if {    ([info exists state(connection)])
+		     && ([info exists socketMapping($state(socketinfo))])
+		     && ($state(connection) eq "close")
+		     && ($state(-keepalive))
+		} {
+		    # The server warns that it will close the socket after this
+		    # response.
+		    ##Log WARNING - socket will close after response for $token
+		    # Prepare data for a call to ReplayIfClose.
+		    if {    ($socketRdQueue($state(socketinfo)) ne {})
+			 || ($socketWrQueue($state(socketinfo)) ne {})
+			 || ($socketWrState($state(socketinfo)) ni
+						[list Wready peNding $token])
+		    } {
+			set InFlightW $socketWrState($state(socketinfo))
+			if {$InFlightW in [list Wready peNding $token]} {
+			    set InFlightW Wready
+			} else {
+			    set msg "token ${InFlightW} is InFlightW"
+			    ##Log $msg - token $token
+			}
+
+			set socketPlayCmd($state(socketinfo)) \
+				[list ReplayIfClose $InFlightW \
+				$socketRdQueue($state(socketinfo)) \
+				$socketWrQueue($state(socketinfo))]
+
+			# - All tokens are preserved for re-use by ReplayCore.
+			# - Queues are preserved in case of Finish with error,
+			#   but are not used for anything else because
+			#   socketClosing(*) is set below.
+			# - Cancel the state(after) timeout events.
+			foreach tokenVal $socketRdQueue($state(socketinfo)) {
+			    if {[info exists ${tokenVal}(after)]} {
+				after cancel [set ${tokenVal}(after)]
+				unset ${tokenVal}(after)
+			    }
+			}
+
+		    } else {
+			set socketPlayCmd($state(socketinfo)) \
+				{ReplayIfClose Wready {} {}}
+		    }
+
+		    # Do not allow further connections on this socket.
+		    set socketClosing($state(socketinfo)) 1
+		}
+
+		set state(state) body
+
+		# If doing a HEAD, then we won't get any body
+		if {$state(-validate)} {
+		    Log ^F$tk end of response for HEAD request - token $token
+		    set state(state) complete
+		    Eot $token
+		    return
+		}
+
+		# - For non-chunked transfer we may have no body - in this case
+		#   we may get no further file event if the connection doesn't
+		#   close and no more data is sent. We can tell and must finish
+		#   up now - not later - the alternative would be to wait until
+		#   the server times out.
+		# - In this case, the server has NOT told the client it will
+		#   close the connection, AND it has NOT indicated the resource
+		#   length EITHER by setting the Content-Length (totalsize) OR
+		#   by using chunked Transfer-Encoding.
+		# - Do not worry here about the case (Connection: close) because
+		#   the server should close the connection.
+		# - IF (NOT Connection: close) AND (NOT chunked encoding) AND
+		#      (totalsize == 0).
+
+		if {    (!(    [info exists state(connection)]
+			    && ($state(connection) eq "close")
+			  )
+			)
+		     && (![info exists state(transfer)])
+		     && ($state(totalsize) == 0)
+		} {
+		    set msg {body size is 0 and no events likely - complete}
+		    Log "$msg - token $token"
+		    set msg {(length unknown, set to 0)}
+		    Log ^F$tk end of response body {*}$msg - token $token
+		    set state(state) complete
+		    Eot $token
+		    return
+		}
+
+		# We have to use binary translation to count bytes properly.
+		lassign [fconfigure $sock -translation] trRead trWrite
+		fconfigure $sock -translation [list binary $trWrite]
+
+		if {
+		    $state(-binary) || [IsBinaryContentType $state(type)]
+		} {
+		    # Turn off conversions for non-text data.
+		    set state(binary) 1
+		}
+		if {[info exists state(-channel)]} {
+		    if {$state(binary) || [llength [ContentEncoding $token]]} {
+			fconfigure $state(-channel) -translation binary
+		    }
+		    if {![info exists state(-handler)]} {
+			# Initiate a sequence of background fcopies.
+			fileevent $sock readable {}
+			rename ${token}EventCoroutine {}
+			CopyStart $sock $token
+			return
+		    }
+		}
+	    } elseif {$nhl > 0} {
+		# Process header lines.
+		##Log header - token $token - $line
+		if {[regexp -nocase {^([^:]+):(.+)$} $line x key value]} {
+		    switch -- [string tolower $key] {
+			content-type {
+			    set state(type) [string trim [string tolower $value]]
+			    # Grab the optional charset information.
+			    if {[regexp -nocase \
+				    {charset\s*=\s*\"((?:[^""]|\\\")*)\"} \
+				    $state(type) -> cs]} {
+				set state(charset) [string map {{\"} \"} $cs]
+			    } else {
+				regexp -nocase {charset\s*=\s*(\S+?);?} \
+					$state(type) -> state(charset)
+			    }
+			}
+			content-length {
+			    set state(totalsize) [string trim $value]
+			}
+			content-encoding {
+			    set state(coding) [string trim $value]
+			}
+			transfer-encoding {
+			    set state(transfer) \
+				    [string trim [string tolower $value]]
+			}
+			proxy-connection -
+			connection {
+			    set state(connection) \
+				    [string trim [string tolower $value]]
+			}
+		    }
+		    lappend state(meta) $key [string trim $value]
+		}
+	    }
+	} else {
+	    # Now reading body
+	    ##Log body - token $token
+	    if {[catch {
+		if {[info exists state(-handler)]} {
+		    set n [eval $state(-handler) [list $sock $token]]
+		    ##Log handler $n - token $token
+		    # N.B. the protocol has been set to 1.0 because the -handler
+		    # logic is not expected to handle chunked encoding.
+		    # FIXME Allow -handler with 1.1 on dechunked stacked chan.
+		    if {$state(totalsize) == 0} {
+			# We know the transfer is complete only when the server
+			# closes the connection - i.e. eof is not an error.
+			set state(state) complete
+		    }
+		    if {![string is integer -strict $n]} {
+			if 1 {
+			    # Do not tolerate bad -handler - fail with error
+			    # status.
+			    set msg {the -handler command for http::geturl must\
+				    return an integer (the number of bytes\
+				    read)}
+			    Log ^X$tk end of response (handler error) -\
+				    token $token
+			    Eot $token $msg
+			} else {
+			    # Tolerate the bad -handler, and continue.  The
+			    # penalty:
+			    # (a) Because the handler returns nonsense, we know
+			    #     the transfer is complete only when the server
+			    #     closes the connection - i.e. eof is not an
+			    #     error.
+			    # (b) http::size will not be accurate.
+			    # (c) The transaction is already downgraded to 1.0
+			    #     to avoid chunked transfer encoding.  It MUST
+			    #     also be forced to "Connection: close" or the
+			    #     HTTP/1.0 equivalent; or it MUST fail (as
+			    #     above) if the server sends
+			    #     "Connection: keep-alive" or the HTTP/1.0
+			    #     equivalent.
+			    set n 0
+			    set state(state) complete
+			}
+		    }
+		} elseif {[info exists state(transfer_final)]} {
+		    # This code forgives EOF in place of the final CRLF.
+		    set line [getTextLine $sock]
+		    set n [string length $line]
+		    set state(state) complete
+		    if {$n > 0} {
+			# - HTTP trailers (late response headers) are permitted
+			#   by Chunked Transfer-Encoding, and can be safely
+			#   ignored.
+			# - Do not count these bytes in the total received for
+			#   the response body.
+			Log "trailer of $n bytes after final chunk -\
+				token $token"
+			append state(transfer_final) $line
+			set n 0
+		    } else {
+			Log ^F$tk end of response body (chunked) - token $token
+			Log "final chunk part - token $token"
+			Eot $token
+		    }
+		} elseif {    [info exists state(transfer)]
+			   && ($state(transfer) eq "chunked")
+		} {
+		    ##Log chunked - token $token
+		    set size 0
+		    set hexLenChunk [getTextLine $sock]
+		    #set ntl [string length $hexLenChunk]
+		    if {[string trim $hexLenChunk] ne ""} {
+			scan $hexLenChunk %x size
+			if {$size != 0} {
+			    ##Log chunk-measure $size - token $token
+			    set chunk [BlockingRead $sock $size]
+			    set n [string length $chunk]
+			    if {$n >= 0} {
+				append state(body) $chunk
+				incr state(log_size) [string length $chunk]
+				##Log chunk $n cumul $state(log_size) -\
+					token $token
+			    }
+			    if {$size != [string length $chunk]} {
+				Log "WARNING: mis-sized chunk:\
+				    was [string length $chunk], should be\
+				    $size - token $token"
+				set n 0
+				set state(connection) close
+				Log ^X$tk end of response (chunk error) \
+					- token $token
+				set msg {error in chunked encoding - fetch\
+					terminated}
+				Eot $token $msg
+			    }
+			    # CRLF that follows chunk.
+			    # If eof, this is handled at the end of this proc.
+			    getTextLine $sock
+			} else {
+			    set n 0
+			    set state(transfer_final) {}
+			}
+		    } else {
+			# Line expected to hold chunk length is empty, or eof.
+			##Log bad-chunk-measure - token $token
+			set n 0
+			set state(connection) close
+			Log ^X$tk end of response (chunk error) - token $token
+			Eot $token {error in chunked encoding -\
+				fetch terminated}
+		    }
+		} else {
+		    ##Log unchunked - token $token
+		    if {$state(totalsize) == 0} {
+			# We know the transfer is complete only when the server
+			# closes the connection.
+			set state(state) complete
+			set reqSize $state(-blocksize)
+		    } else {
+			# Ask for the whole of the unserved response-body.
+			# This works around a problem with a tls::socket - for
+			# https in keep-alive mode, and a request for
+			# $state(-blocksize) bytes, the last part of the
+			# resource does not get read until the server times out.
+			set reqSize [expr {  $state(totalsize)
+					   - $state(currentsize)}]
+
+			# The workaround fails if reqSize is
+			# capped at $state(-blocksize).
+			# set reqSize [expr {min($reqSize, $state(-blocksize))}]
+		    }
+		    set c $state(currentsize)
+		    set t $state(totalsize)
+		    ##Log non-chunk currentsize $c of totalsize $t -\
+			    token $token
+		    set block [read $sock $reqSize]
+		    set n [string length $block]
+		    if {$n >= 0} {
+			append state(body) $block
+			##Log non-chunk [string length $state(body)] -\
+				token $token
+		    }
+		}
+		# This calculation uses n from the -handler, chunked, or
+		# unchunked case as appropriate.
+		if {[info exists state]} {
+		    if {$n >= 0} {
+			incr state(currentsize) $n
+			set c $state(currentsize)
+			set t $state(totalsize)
+			##Log another $n currentsize $c totalsize $t -\
+				token $token
+		    }
+		    # If Content-Length - check for end of data.
+		    if {
+			   ($state(totalsize) > 0)
+			&& ($state(currentsize) >= $state(totalsize))
+		    } {
+			Log ^F$tk end of response body (unchunked) -\
+				token $token
+			set state(state) complete
+			Eot $token
+		    }
+		}
+	    } err]} {
+		Log ^X$tk end of response (error ${err}) - token $token
+		Finish $token $err
+		return
+	    } else {
+		if {[info exists state(-progress)]} {
+		    eval $state(-progress) \
+			[list $token $state(totalsize) $state(currentsize)]
+		}
+	    }
+	}
+
+	# catch as an Eot above may have closed the socket already
+	# $state(state) may be connecting, header, body, or complete
+	if {![set cc [catch {eof $sock} eof]] && $eof} {
+	    ##Log eof - token $token
+	    if {[info exists $token]} {
+		set state(connection) close
+		if {$state(state) eq "complete"} {
+		    # This includes all cases in which the transaction
+		    # can be completed by eof.
+		    # The value "complete" is set only in http::Event, and it is
+		    # used only in the test above.
+		    Log ^F$tk end of response body (unchunked, eof) -\
+			    token $token
+		    Eot $token
+		} else {
+		    # Premature eof.
+		    Log ^X$tk end of response (unexpected eof) - token $token
+		    Eot $token eof
+		}
+	    } else {
+		# open connection closed on a token that has been cleaned up.
+		Log ^X$tk end of response (token error) - token $token
+		CloseSocket $sock
+	    }
+	} elseif {$cc} {
+	    return
+	}
+    }
+}
+
+# http::TestForReplay
+#
+#	Command called if eof is discovered when a socket is first used for a
+#	new transaction.  Typically this occurs if a persistent socket is used
+#	after a period of idleness and the server has half-closed the socket.
+#
+# token  - the connection token returned by http::geturl
+# doing  - "read" or "write"
+# err    - error message, if any
+# caller - code to identify the caller - used only in logging
+#
+# Return Value: boolean, true iff the command calls http::ReplayIfDead.
+
+proc http::TestForReplay {token doing err caller} {
+    variable http
+    variable $token
+    upvar 0 $token state
+    set tk [namespace tail $token]
+    if {$doing eq "read"} {
+	set code Q
+	set action response
+	set ing reading
+    } else {
+	set code P
+	set action request
+	set ing writing
+    }
+
+    if {$err eq {}} {
+	set err "detect eof when $ing (server timed out?)"
+    }
+
+    if {$state(method) eq "POST" && !$http(-repost)} {
+	# No Replay.
+	# The present transaction will end when Finish is called.
+	# That call to Finish will abort any other transactions
+	# currently in the write queue.
+	# For calls from http::Event this occurs when execution
+	# reaches the code block at the end of that proc.
+	set msg {no retry for POST with http::config -repost 0}
+	Log reusing socket failed "($caller)" - $msg - token $token
+	Log error - $err - token $token
+	Log ^X$tk end of $action (error) - token $token
+	return 0
+    } else {
+	# Replay.
+	set msg {try a new socket}
+	Log reusing socket failed "($caller)" - $msg - token $token
+	Log error - $err - token $token
+	Log ^$code$tk Any unfinished (incl this one) failed - token $token
+	ReplayIfDead $token $doing
+	return 1
+    }
+}
+
+# http::IsBinaryContentType --
+#
+#	Determine if the content-type means that we should definitely transfer
+#	the data as binary. [Bug 838e99a76d]
+#
+# Arguments
+#	type	The content-type of the data.
+#
+# Results:
+#	Boolean, true if we definitely should be binary.
+
+proc http::IsBinaryContentType {type} {
+    lassign [split [string tolower $type] "/;"] major minor
+    if {$major eq "text"} {
+	return false
+    }
+    # There's a bunch of XML-as-application-format things about. See RFC 3023
+    # and so on.
+    if {$major eq "application"} {
+	set minor [string trimright $minor]
+	if {$minor in {"xml" "xml-external-parsed-entity" "xml-dtd"}} {
+	    return false
+	}
+    }
+    # Not just application/foobar+xml but also image/svg+xml, so let us not
+    # restrict things for now...
+    if {[string match "*+xml" $minor]} {
+	return false
+    }
+    return true
+}
+
+# http::getTextLine --
+#
+#	Get one line with the stream in crlf mode.
+#	Used if Transfer-Encoding is chunked.
+#	Empty line is not distinguished from eof.  The caller must
+#	be able to handle this.
+#
+# Arguments
+#	sock	The socket receiving input.
+#
+# Results:
+#	The line of text, without trailing newline
+
+proc http::getTextLine {sock} {
+    set tr [fconfigure $sock -translation]
+    lassign $tr trRead trWrite
+    fconfigure $sock -translation [list crlf $trWrite]
+    set r [BlockingGets $sock]
+    fconfigure $sock -translation $tr
+    return $r
+}
+
+# http::BlockingRead
+#
+#	Replacement for a blocking read.
+#	The caller must be a coroutine.
+
+proc http::BlockingRead {sock size} {
+    if {$size < 1} {
+	return
+    }
+    set result {}
+    while 1 {
+	set need [expr {$size - [string length $result]}]
+	set block [read $sock $need]
+	set eof [eof $sock]
+	append result $block
+	if {[string length $result] >= $size || $eof} {
+	    return $result
+	} else {
+	    yield
+	}
+    }
+}
+
+# http::BlockingGets
+#
+#	Replacement for a blocking gets.
+#	The caller must be a coroutine.
+#	Empty line is not distinguished from eof.  The caller must
+#	be able to handle this.
+
+proc http::BlockingGets {sock} {
+    while 1 {
+	set count [gets $sock line]
+	set eof [eof $sock]
+	if {$count > -1 || $eof} {
+	    return $line
+	} else {
+	    yield
+	}
+    }
+}
+
+# http::CopyStart
+#
+#	Error handling wrapper around fcopy
+#
+# Arguments
+#	sock	The socket to copy from
+#	token	The token returned from http::geturl
+#
+# Side Effects
+#	This closes the connection upon error
+
+proc http::CopyStart {sock token {initial 1}} {
+    upvar #0 $token state
+    if {[info exists state(transfer)] && $state(transfer) eq "chunked"} {
+	foreach coding [ContentEncoding $token] {
+	    lappend state(zlib) [zlib stream $coding]
+	}
+	make-transformation-chunked $sock [namespace code [list CopyChunk $token]]
+    } else {
+	if {$initial} {
+	    foreach coding [ContentEncoding $token] {
+		zlib push $coding $sock
+	    }
+	}
+	if {[catch {
+	    # FIXME Keep-Alive on https tls::socket with unchunked transfer
+	    # hangs until the server times out. A workaround is possible, as for
+	    # the case without -channel, but it does not use the neat "fcopy"
+	    # solution.
+	    fcopy $sock $state(-channel) -size $state(-blocksize) -command \
+		[list http::CopyDone $token]
+	} err]} {
+	    Finish $token $err
+	}
+    }
+}
+
+proc http::CopyChunk {token chunk} {
+    upvar 0 $token state
+    if {[set count [string length $chunk]]} {
+	incr state(currentsize) $count
+	if {[info exists state(zlib)]} {
+	    foreach stream $state(zlib) {
+		set chunk [$stream add $chunk]
+	    }
+	}
+	puts -nonewline $state(-channel) $chunk
+	if {[info exists state(-progress)]} {
+	    eval [linsert $state(-progress) end \
+		      $token $state(totalsize) $state(currentsize)]
+	}
+    } else {
+	Log "CopyChunk Finish - token $token"
+	if {[info exists state(zlib)]} {
+	    set excess ""
+	    foreach stream $state(zlib) {
+		catch {set excess [$stream add -finalize $excess]}
+	    }
+	    puts -nonewline $state(-channel) $excess
+	    foreach stream $state(zlib) { $stream close }
+	    unset state(zlib)
+	}
+	Eot $token ;# FIX ME: pipelining.
+    }
+}
+
+# http::CopyDone
+#
+#	fcopy completion callback
+#
+# Arguments
+#	token	The token returned from http::geturl
+#	count	The amount transfered
+#
+# Side Effects
+#	Invokes callbacks
+
+proc http::CopyDone {token count {error {}}} {
+    variable $token
+    upvar 0 $token state
+    set sock $state(sock)
+    incr state(currentsize) $count
+    if {[info exists state(-progress)]} {
+	eval $state(-progress) \
+	    [list $token $state(totalsize) $state(currentsize)]
+    }
+    # At this point the token may have been reset.
+    if {[string length $error]} {
+	Finish $token $error
+    } elseif {[catch {eof $sock} iseof] || $iseof} {
+	Eot $token
+    } else {
+	CopyStart $sock $token 0
+    }
+}
+
+# http::Eot
+#
+#	Called when either:
+#	a. An eof condition is detected on the socket.
+#	b. The client decides that the response is complete.
+#	c. The client detects an inconsistency and aborts the transaction.
+#
+#	Does:
+#	1. Set state(status)
+#	2. Reverse any Content-Encoding
+#	3. Convert charset encoding and line ends if necessary
+#	4. Call http::Finish
+#
+# Arguments
+#	token	The token returned from http::geturl
+#	force	(previously) optional, has no effect
+#	reason	- "eof" means premature EOF (not EOF as the natural end of
+#		  the response)
+#		- "" means completion of response, with or without EOF
+#		- anything else describes an error confition other than
+#		  premature EOF.
+#
+# Side Effects
+#	Clean up the socket
+
+proc http::Eot {token {reason {}}} {
+    variable $token
+    upvar 0 $token state
+    if {$reason eq "eof"} {
+	# Premature eof.
+	set state(status) eof
+	set reason {}
+    } elseif {$reason ne ""} {
+	# Abort the transaction.
+	set state(status) $reason
+    } else {
+	# The response is complete.
+	set state(status) ok
+    }
+
+    if {[string length $state(body)] > 0} {
+	if {[catch {
+	    foreach coding [ContentEncoding $token] {
+		set state(body) [zlib $coding $state(body)]
+	    }
+	} err]} {
+	    Log "error doing decompression for token $token: $err"
+	    Finish $token $err
+	    return
+	}
+
+	if {!$state(binary)} {
+	    # If we are getting text, set the incoming channel's encoding
+	    # correctly.  iso8859-1 is the RFC default, but this could be any
+	    # IANA charset.  However, we only know how to convert what we have
+	    # encodings for.
+
+	    set enc [CharsetToEncoding $state(charset)]
+	    if {$enc ne "binary"} {
+		set state(body) [encoding convertfrom $enc $state(body)]
+	    }
+
+	    # Translate text line endings.
+	    set state(body) [string map {\r\n \n \r \n} $state(body)]
+	}
+    }
+    Finish $token $reason
+}
+
+# http::wait --
+#
+#	See documentation for details.
+#
+# Arguments:
+#	token	Connection token.
+#
+# Results:
+#	The status after the wait.
+
+proc http::wait {token} {
+    variable $token
+    upvar 0 $token state
+
+    if {![info exists state(status)] || $state(status) eq ""} {
+	# We must wait on the original variable name, not the upvar alias
+	vwait ${token}(status)
+    }
+
+    return [status $token]
+}
+
+# http::formatQuery --
+#
+#	See documentation for details.  Call http::formatQuery with an even
+#	number of arguments, where the first is a name, the second is a value,
+#	the third is another name, and so on.
+#
+# Arguments:
+#	args	A list of name-value pairs.
+#
+# Results:
+#	TODO
+
+proc http::formatQuery {args} {
+    if {[llength $args] % 2} {
+        return \
+            -code error \
+            -errorcode [list HTTP BADARGCNT $args] \
+            {Incorrect number of arguments, must be an even number.}
+    }
+    set result ""
+    set sep ""
+    foreach i $args {
+	append result $sep [mapReply $i]
+	if {$sep eq "="} {
+	    set sep &
+	} else {
+	    set sep =
+	}
+    }
+    return $result
+}
+
+# http::mapReply --
+#
+#	Do x-www-urlencoded character mapping
+#
+# Arguments:
+#	string	The string the needs to be encoded
+#
+# Results:
+#       The encoded string
+
+proc http::mapReply {string} {
+    variable http
+    variable formMap
+
+    # The spec says: "non-alphanumeric characters are replaced by '%HH'". Use
+    # a pre-computed map and [string map] to do the conversion (much faster
+    # than [regsub]/[subst]). [Bug 1020491]
+
+    if {$http(-urlencoding) ne ""} {
+	set string [encoding convertto $http(-urlencoding) $string]
+	return [string map $formMap $string]
+    }
+    set converted [string map $formMap $string]
+    if {[string match "*\[\u0100-\uffff\]*" $converted]} {
+	regexp "\[\u0100-\uffff\]" $converted badChar
+	# Return this error message for maximum compatibility... :^/
+	return -code error \
+	    "can't read \"formMap($badChar)\": no such element in array"
+    }
+    return $converted
+}
+interp alias {} http::quoteString {} http::mapReply
+
+# http::ProxyRequired --
+#	Default proxy filter.
+#
+# Arguments:
+#	host	The destination host
+#
+# Results:
+#       The current proxy settings
+
+proc http::ProxyRequired {host} {
+    variable http
+    if {[info exists http(-proxyhost)] && [string length $http(-proxyhost)]} {
+	if {
+	    ![info exists http(-proxyport)] ||
+	    ![string length $http(-proxyport)]
+	} {
+	    set http(-proxyport) 8080
+	}
+	return [list $http(-proxyhost) $http(-proxyport)]
+    }
+}
+
+# http::CharsetToEncoding --
+#
+#	Tries to map a given IANA charset to a tcl encoding.  If no encoding
+#	can be found, returns binary.
+#
+
+proc http::CharsetToEncoding {charset} {
+    variable encodings
+
+    set charset [string tolower $charset]
+    if {[regexp {iso-?8859-([0-9]+)} $charset -> num]} {
+	set encoding "iso8859-$num"
+    } elseif {[regexp {iso-?2022-(jp|kr)} $charset -> ext]} {
+	set encoding "iso2022-$ext"
+    } elseif {[regexp {shift[-_]?js} $charset]} {
+	set encoding "shiftjis"
+    } elseif {[regexp {(?:windows|cp)-?([0-9]+)} $charset -> num]} {
+	set encoding "cp$num"
+    } elseif {$charset eq "us-ascii"} {
+	set encoding "ascii"
+    } elseif {[regexp {(?:iso-?)?lat(?:in)?-?([0-9]+)} $charset -> num]} {
+	switch -- $num {
+	    5 {set encoding "iso8859-9"}
+	    1 - 2 - 3 {
+		set encoding "iso8859-$num"
+	    }
+	}
+    } else {
+	# other charset, like euc-xx, utf-8,...  may directly map to encoding
+	set encoding $charset
+    }
+    set idx [lsearch -exact $encodings $encoding]
+    if {$idx >= 0} {
+	return $encoding
+    } else {
+	return "binary"
+    }
+}
+
+# Return the list of content-encoding transformations we need to do in order.
+proc http::ContentEncoding {token} {
+    upvar 0 $token state
+    set r {}
+    if {[info exists state(coding)]} {
+	foreach coding [split $state(coding) ,] {
+	    switch -exact -- $coding {
+		deflate { lappend r inflate }
+		gzip - x-gzip { lappend r gunzip }
+		compress - x-compress { lappend r decompress }
+		identity {}
+		default {
+		    return -code error "unsupported content-encoding \"$coding\""
+		}
+	    }
+	}
+    }
+    return $r
+}
+
+proc http::ReceiveChunked {chan command} {
+    set data ""
+    set size -1
+    yield
+    while {1} {
+	chan configure $chan -translation {crlf binary}
+	while {[gets $chan line] < 1} { yield }
+	chan configure $chan -translation {binary binary}
+	if {[scan $line %x size] != 1} {
+	    return -code error "invalid size: \"$line\""
+	}
+	set chunk ""
+	while {$size && ![chan eof $chan]} {
+	    set part [chan read $chan $size]
+	    incr size -[string length $part]
+	    append chunk $part
+	}
+	if {[catch {
+	    uplevel #0 [linsert $command end $chunk]
+	}]} {
+	    http::Log "Error in callback: $::errorInfo"
+	}
+	if {[string length $chunk] == 0} {
+	    # channel might have been closed in the callback
+	    catch {chan event $chan readable {}}
+	    return
+	}
+    }
+}
+
+proc http::make-transformation-chunked {chan command} {
+    coroutine [namespace current]::dechunk$chan ::http::ReceiveChunked $chan $command
+    chan event $chan readable [namespace current]::dechunk$chan
+}
+
+# Local variables:
+# indent-tabs-mode: t
+# End: