diff options
Diffstat (limited to 'library/http/http.tcl')
| -rw-r--r-- | library/http/http.tcl | 273 |
1 files changed, 153 insertions, 120 deletions
diff --git a/library/http/http.tcl b/library/http/http.tcl index ce9f634..b5ce82b 100644 --- a/library/http/http.tcl +++ b/library/http/http.tcl @@ -8,10 +8,10 @@ # See the file "license.terms" for information on usage and redistribution of # this file, and for a DISCLAIMER OF ALL WARRANTIES. -package require Tcl 8.4 +package require Tcl 8.6 # Keep this in sync with pkgIndex.tcl and with the install directories in # Makefiles -package provide http 2.7.9 +package provide http 2.8.4 namespace eval http { # Allow resourcing to not clobber existing data @@ -25,7 +25,13 @@ namespace eval http { -proxyfilter http::ProxyRequired -urlencoding utf-8 } - set http(-useragent) "Tcl http client package [package provide http]" + # 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. + set http(-useragent) "Mozilla/5.0\ + ([string totitle $::tcl_platform(platform)]; U;\ + $::tcl_platform(os) $::tcl_platform(osVersion))\ + http/[package provide http] Tcl/[package provide Tcl]" } proc init {} { @@ -92,7 +98,7 @@ namespace eval http { # Arguments: # msg Message to output # -proc http::Log {args} {} +if {[info command http::Log] eq {}} {proc http::Log {args} {}} # http::register -- # @@ -193,7 +199,7 @@ proc http::Finish {token {errormsg ""} {skipCB 0}} { if { ($state(status) eq "timeout") || ($state(status) eq "error") || ([info exists state(connection)] && ($state(connection) eq "close")) - } then { + } { CloseSocket $state(sock) $token } if {[info exists state(after)]} { @@ -361,7 +367,7 @@ proc http::geturl {url args} { if { [info exists type($flag)] && ![string is $type($flag) -strict $value] - } then { + } { unset $token return -code error \ "Bad value for $flag ($value), must be $type($flag)" @@ -647,7 +653,11 @@ proc http::geturl {url args} { 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 + } if {[catch { puts $sock "$how $srvurl HTTP/$state(-protocol)" puts $sock "Accept: $http(-accept)" @@ -695,14 +705,8 @@ proc http::geturl {url args} { puts $sock "$key: $value" } } - # Soft zlib dependency check - no package require - if { - !$accept_encoding_seen && - ([package vsatisfies [package provide Tcl] 8.6] - || [llength [package provide zlib]]) && - !([info exists state(-channel)] || [info exists state(-handler)]) - } then { - puts $sock "Accept-Encoding: gzip, identity, *;q=0.1" + if {!$accept_encoding_seen && ![info exists state(-handler)]} { + puts $sock "Accept-Encoding: deflate,gzip,compress" } if {$isQueryChannel && $state(querylength) == 0} { # Try to determine size of data in channel. If we cannot seek, the @@ -726,7 +730,7 @@ proc http::geturl {url args} { # 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 + # 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 @@ -759,7 +763,7 @@ proc http::geturl {url args} { return -code error [lindex $state(error) 0] } } - } err]} then { + } err]} { # The socket probably was never connected, or the connection dropped # later. @@ -867,7 +871,7 @@ proc http::Connect {token} { if { [eof $state(sock)] || [set err [fconfigure $state(sock) -error]] ne "" - } then { + } { Finish $token "connect failed $err" 1 } else { set state(status) connect @@ -918,7 +922,7 @@ proc http::Write {token} { set done 1 } } - } err]} then { + } err]} { # Do not call Finish here, but instead let the read half of the socket # process whatever server reply there is to get. @@ -997,7 +1001,7 @@ proc http::Event {sock token} { && ($state(connection) eq "close")) || [info exists state(transfer)]) && ($state(totalsize) == 0) - } then { + } { Log "body size is 0 and no events likely - complete." Eof $token return @@ -1008,26 +1012,20 @@ proc http::Event {sock token} { if { $state(-binary) || ![string match -nocase text* $state(type)] - } then { + } { # Turn off conversions for non-text data set state(binary) 1 } - if { - $state(binary) || [string match *gzip* $state(coding)] || - [string match *compress* $state(coding)] - } then { - if {[info exists state(-channel)]} { + if {[info exists state(-channel)]} { + if {$state(binary) || [llength [ContentEncoding $token]]} { fconfigure $state(-channel) -translation binary } - } - if { - [info exists state(-channel)] && - ![info exists state(-handler)] - } then { - # Initiate a sequence of background fcopies - fileevent $sock readable {} - CopyStart $sock $token - return + if {![info exists state(-handler)]} { + # Initiate a sequence of background fcopies + fileevent $sock readable {} + CopyStart $sock $token + return + } } } elseif {$n > 0} { # Process header lines @@ -1082,7 +1080,7 @@ proc http::Event {sock token} { } elseif { [info exists state(transfer)] && $state(transfer) eq "chunked" - } then { + } { set size 0 set chunk [getTextLine $sock] set n [string length $chunk] @@ -1122,11 +1120,11 @@ proc http::Event {sock token} { if { ($state(totalsize) > 0) && ($state(currentsize) >= $state(totalsize)) - } then { + } { Eof $token } } - } err]} then { + } err]} { return [Finish $token $err] } else { if {[info exists state(-progress)]} { @@ -1179,14 +1177,54 @@ proc http::getTextLine {sock} { # Side Effects # This closes the connection upon error -proc http::CopyStart {sock token} { - variable $token +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 { + 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 {[catch { - fcopy $sock $state(-channel) -size $state(-blocksize) -command \ - [list http::CopyDone $token] - } err]} then { - Finish $token $err + 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" + 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) + } + Eof $token ;# FIX ME: pipelining. } } @@ -1216,7 +1254,7 @@ proc http::CopyDone {token count {error {}}} { } elseif {[catch {eof $sock} iseof] || $iseof} { Eof $token } else { - CopyStart $sock $token + CopyStart $sock $token 0 } } @@ -1240,34 +1278,31 @@ proc http::Eof {token {force 0}} { set state(status) ok } - if {($state(coding) eq "gzip") && [string length $state(body)] > 0} { - if {[catch { - if {[package vsatisfies [package present Tcl] 8.6]} { - # The zlib integration into 8.6 includes proper gzip support - set state(body) [zlib gunzip $state(body)] - } else { - set state(body) [Gunzip $state(body)] + if {[string length $state(body)] > 0} { + if {[catch { + foreach coding [ContentEncoding $token] { + set state(body) [zlib $coding $state(body)] } - } err]} then { + } err]} { + Log "error doing $coding '$state(body)'" return [Finish $token $err] - } - } + } - if {!$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. + 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)] - } + 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)] + # Translate text line endings. + set state(body) [string map {\r\n \n \r \n} $state(body)] + } } - Finish $token } @@ -1366,7 +1401,7 @@ proc http::ProxyRequired {host} { if { ![info exists http(-proxyport)] || ![string length $http(-proxyport)] - } then { + } { set http(-proxyport) 8080 } return [list $http(-proxyhost) $http(-proxyport)] @@ -1412,59 +1447,57 @@ proc http::CharsetToEncoding {charset} { } } -# http::Gunzip -- -# -# Decompress data transmitted using the gzip transfer coding. -# - -# FIX ME: redo using zlib sinflate -proc http::Gunzip {data} { - binary scan $data Scb5icc magic method flags time xfl os - set pos 10 - if {$magic != 0x1f8b} { - return -code error "invalid data: supplied data is not in gzip format" - } - if {$method != 8} { - return -code error "invalid compression method" - } - - # lassign [split $flags ""] f_text f_crc f_extra f_name f_comment - foreach {f_text f_crc f_extra f_name f_comment} [split $flags ""] break - set extra "" - if {$f_extra} { - binary scan $data @${pos}S xlen - incr pos 2 - set extra [string range $data $pos $xlen] - set pos [incr xlen] - } - - set name "" - if {$f_name} { - set ndx [string first \0 $data $pos] - set name [string range $data $pos $ndx] - set pos [incr ndx] - } - - set comment "" - if {$f_comment} { - set ndx [string first \0 $data $pos] - set comment [string range $data $pos $ndx] - set pos [incr ndx] - } - - set fcrc "" - if {$f_crc} { - set fcrc [string range $data $pos [incr pos]] - incr pos +# 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 +} - binary scan [string range $data end-7 end] ii crc size - set inflated [zlib inflate [string range $data $pos end-8]] - set chk [zlib crc32 $inflated] - if {($crc & 0xffffffff) != ($chk & 0xffffffff)} { - return -code error "invalid data: checksum mismatch $crc != $chk" - } - return $inflated +proc http::make-transformation-chunked {chan command} { + set lambda {{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 $chan readable {}} + return + } + } + }} + coroutine dechunk$chan ::apply $lambda $chan $command + chan event $chan readable [namespace origin dechunk$chan] + return } # Local variables: |