/usr/share/tcltk/tcl8.4/http2.5/http.tcl is in libtcl8.4 8.4.20-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 | # 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.
# Rough version history:
# 1.0 Old http_get interface.
# 2.0 http:: namespace and http::geturl.
# 2.1 Added callbacks to handle arriving data, and timeouts.
# 2.2 Added ability to fetch into a channel.
# 2.3 Added SSL support, and ability to post from a channel. This version
# also cleans up error cases and eliminates the "ioerror" status in
# favor of raising an error
# 2.4 Added -binary option to http::geturl and charset element to the state
# array.
package require Tcl 8.4
# Keep this in sync with pkgIndex.tcl and with the install directories
# in Makefiles
package provide http 2.5.8
namespace eval http {
variable http
array set http {
-accept */*
-proxyhost {}
-proxyport {}
-proxyfilter http::ProxyRequired
-urlencoding utf-8
}
set http(-useragent) "Tcl http client package [package provide http]"
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 $i]
}
}
# These are handled specially
set map(\n) %0D%0A
variable formMap [array get map]
}
init
variable urlTypes
array set urlTypes {
http {80 ::socket}
}
variable encodings [string tolower [encoding names]]
# This can be changed, but iso8859-1 is the RFC standard.
variable defaultCharset "iso8859-1"
# Force RFC 3986 strictness in geturl url verification? Not for 8.4.x
variable strict 0
namespace export geturl config reset wait formatQuery register unregister
# Useful, but not exported: data size status code
}
# http::register --
#
# See documentation for details.
#
# Arguments:
# proto URL protocol prefix, e.g. https
# port Default port for protocol
# command Command to use to create socket
# Results:
# list of port and command that was registered.
proc http::register {proto port command} {
variable urlTypes
set urlTypes($proto) [list $port $command]
}
# http::unregister --
#
# Unregisters URL protocol handler
#
# Arguments:
# proto URL protocol prefix, e.g. https
# Results:
# list of port and command that was unregistered.
proc http::unregister {proto} {
variable urlTypes
if {![info exists urlTypes($proto)]} {
return -code error "unsupported url type \"$proto\""
}
set old $urlTypes($proto)
unset urlTypes($proto)
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 $http($flag)
} else {
return -code error "Unknown option $flag, must be: $usage"
}
} else {
foreach {flag value} $args {
if {[regexp -- $pat $flag]} {
set http($flag) $value
} else {
return -code error "Unknown option $flag, must be: $usage"
}
}
}
}
# 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:
# Closes the socket
proc http::Finish { token {errormsg ""} {skipCB 0}} {
variable $token
upvar 0 $token state
global errorInfo errorCode
if {[string length $errormsg] != 0} {
set state(error) [list $errormsg $errorInfo $errorCode]
set state(status) error
}
catch {close $state(sock)}
catch {after cancel $state(after)}
if {[info exists state(-command)] && !$skipCB} {
if {[catch {eval $state(-command) {$token}} err]} {
if {[string length $errormsg] == 0} {
set state(error) [list $err $errorInfo $errorCode]
set state(status) error
}
}
if {[info exists state(-command)]} {
# Command callback may already have unset our state
unset state(-command)
}
}
}
# 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 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)]
variable $token
upvar 0 $token state
reset $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 {}
state header
meta {}
coding {}
currentsize 0
totalsize 0
querylength 0
queryoffset 0
type text/html
body {}
status ""
http ""
}
# These flags have their types verified [Bug 811170]
array set type {
-binary boolean
-blocksize integer
-queryblocksize integer
-validate boolean
-timeout integer
}
set state(charset) $defaultCharset
set options {-binary -blocksize -channel -command -handler -headers \
-progress -query -queryblocksize -querychannel -queryprogress\
-validate -timeout -type}
set usage [join $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 / 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.
# 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.
# Also note that we do not currently support IPv6 addresses.
#
# 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 $::http::strict is true (default 0 for compat).
set URLmatcher {(?x) # this is _expanded_ syntax
^
(?: (\w+) : ) ? # <protocol scheme>
(?: //
(?:
(
[^@/\#?]+ # <userinfo part of authority>
) @
)?
( [^/:\#?]+ ) # <host part of authority>
(?: : (\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: $url"
}
# Phase two: validate
if {$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 {$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 {$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 {[string length $proto] == 0} {
set proto http
}
if {![info exists urlTypes($proto)]} {
unset $token
return -code error "Unsupported URL type \"$proto\""
}
set defport [lindex $urlTypes($proto) 0]
set defcmd [lindex $urlTypes($proto) 1]
if {[string length $port] == 0} {
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) $url
# If a timeout is specified we set up the after event and arrange for an
# asynchronous socket connection.
if {$state(-timeout) > 0} {
set state(after) [after $state(-timeout) \
[list http::reset $token timeout]]
set async -async
} else {
set async ""
}
# If we are using the proxy, we must pass in the full URL that includes
# the server name.
if {[info exists phost] && [string length $phost]} {
set srvurl $url
set conStat [catch {eval $defcmd $async {$phost $pport}} s]
} else {
set conStat [catch {eval $defcmd $async {$host $port}} s]
}
if {$conStat} {
# 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.
Finish $token "" 1
cleanup $token
return -code error $s
}
set state(sock) $s
# Wait for the connection to complete.
if {$state(-timeout) > 0} {
fileevent $s writable [list http::Connect $token]
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 $token
} else {
if {$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 $err
} elseif {$state(status) ne "connect"} {
# Likely to be connection timeout
return $token
}
set state(status) ""
}
}
# Send data in cr-lf format, but accept any line terminators
fconfigure $s -translation {auto 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 $s -blocking off}
set how GET
if {$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.
fconfigure $state(-querychannel) -blocking 1 -translation binary
set contDone 0
}
if {[catch {
puts $s "$how $srvurl HTTP/1.0"
puts $s "Accept: $http(-accept)"
if {$port == $defport} {
# Don't add port in this case, to handle broken servers. [Bug
# 504508]
puts $s "Host: $host"
} else {
puts $s "Host: $host:$port"
}
puts $s "User-Agent: $http(-useragent)"
foreach {key value} $state(-headers) {
set value [string map [list \n "" \r ""] $value]
set key [string trim $key]
if {$key eq "Content-Length"} {
set contDone 1
set state(querylength) $value
}
if {[string length $key]} {
puts $s "$key: $value"
}
}
if {$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} {
puts $s "Content-Type: $state(-type)"
if {!$contDone} {
puts $s "Content-Length: $state(querylength)"
}
puts $s ""
fconfigure $s -translation {auto binary}
fileevent $s writable [list http::Write $token]
} else {
puts $s ""
flush $s
fileevent $s readable [list http::Event $token]
}
if {! [info exists state(-command)]} {
# geturl does EVERYTHING asynchronously, so if the user calls it
# synchronously, we just do a wait here.
wait $token
if {$state(status) eq "error"} {
# Something went wrong, so throw the exception, and the
# enclosing catch will do cleanup.
return -code error [lindex $state(error) 0]
}
}
} err]} {
# The socket probably was never connected, or the connection dropped
# later.
# Clean up after events and such, but DON'T call the command callback
# (if available) because we're going to throw an exception from here
# instead.
# if state(status) is error, it means someone's already called Finish
# to do the above-described clean up.
if {$state(status) ne "error"} {
Finish $token $err 1
}
cleanup $token
return -code error $err
}
return $token
}
# Data access functions:
# Data - the URL data
# Status - the transaction status: ok, reset, eof, timeout
# 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 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} {
variable $token
upvar 0 $token state
set err "due to unexpected EOF"
if {[eof $state(sock)] ||
[string length [set err [fconfigure $state(sock) -error]]]} {
Finish $token "connect failed $err" 1
} else {
set state(status) connect
fileevent $state(sock) writable {}
}
return
}
# 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 $token
upvar 0 $token state
set s $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.
puts -nonewline $s \
[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)]
puts -nonewline $s $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 $s}
fileevent $s writable {}
fileevent $s readable [list http::Event $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
#
# Arguments
# token The token returned from http::geturl
#
# Side Effects
# Read the socket and handle callbacks.
proc http::Event {token} {
variable $token
upvar 0 $token state
set s $state(sock)
if {$state(state) eq "header"} {
if {[catch {gets $s line} n]} {
return [Finish $token $n]
} elseif {$n == 0} {
variable encodings
set state(state) body
if {$state(-binary) || ![string match -nocase text* $state(type)]
|| [string match *gzip* $state(coding)]
|| [string match *compress* $state(coding)]} {
# Turn off conversions for non-text data
fconfigure $s -translation binary
if {[info exists state(-channel)]} {
fconfigure $state(-channel) -translation binary
}
} else {
# 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 idx [lsearch -exact $encodings \
[string tolower $state(charset)]]
if {$idx >= 0} {
fconfigure $s -encoding [lindex $encodings $idx]
}
}
if {[info exists state(-channel)] && \
![info exists state(-handler)]} {
# Initiate a sequence of background fcopies
fileevent $s readable {}
CopyStart $s $token
return
}
} elseif {$n > 0} {
if {[regexp -nocase {^content-type:(.+)$} $line x type]} {
set state(type) [string trim $type]
# grab the optional charset information
regexp -nocase {charset\s*=\s*(\S+)} $type x state(charset)
}
if {[regexp -nocase {^content-length:(.+)$} $line x length]} {
set state(totalsize) [string trim $length]
}
if {[regexp -nocase {^content-encoding:(.+)$} $line x coding]} {
set state(coding) [string trim $coding]
}
if {[regexp -nocase {^([^:]+):(.+)$} $line x key value]} {
lappend state(meta) $key [string trim $value]
} elseif {[string match HTTP* $line]} {
set state(http) $line
}
}
} else {
if {[catch {
if {[info exists state(-handler)]} {
set n [eval $state(-handler) {$s $token}]
} else {
set block [read $s $state(-blocksize)]
set n [string length $block]
if {$n >= 0} {
append state(body) $block
}
}
if {$n >= 0} {
incr state(currentsize) $n
}
} err]} {
return [Finish $token $err]
} else {
if {[info exists state(-progress)]} {
eval $state(-progress) \
{$token $state(totalsize) $state(currentsize)}
}
}
}
if {[eof $s]} {
Eof $token
return
}
}
# http::CopyStart
#
# Error handling wrapper around fcopy
#
# Arguments
# s The socket to copy from
# token The token returned from http::geturl
#
# Side Effects
# This closes the connection upon error
proc http::CopyStart {s token} {
variable $token
upvar 0 $token state
if {[catch {
fcopy $s $state(-channel) -size $state(-blocksize) -command \
[list http::CopyDone $token]
} err]} {
Finish $token $err
}
}
# 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 s $state(sock)
incr state(currentsize) $count
if {[info exists state(-progress)]} {
eval $state(-progress) {$token $state(totalsize) $state(currentsize)}
}
# At this point the token may have been reset
if {[string length $error]} {
Finish $token $error
} elseif {[catch {eof $s} iseof] || $iseof} {
Eof $token
} else {
CopyStart $s $token
}
}
# http::Eof
#
# Handle eof on the socket
#
# Arguments
# token The token returned from http::geturl
#
# Side Effects
# Clean up the socket
proc http::Eof {token} {
variable $token
upvar 0 $token state
if {$state(state) eq "header"} {
# Premature eof
set state(status) eof
} else {
set state(status) ok
}
set state(state) eof
Finish $token
}
# 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)] || [string length $state(status)] == 0} {
# 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} {
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]} $converted badChar
# Return this error message for maximum compatability... :^/
return -code error \
"can't read \"formMap($badChar)\": no such element in array"
}
return $converted
}
# 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)]
}
}
# Local variables:
# indent-tabs-mode: t
# End:
|