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1585 lines
43 KiB
1585 lines
43 KiB
# http.tcl --
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#
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# Client-side HTTP for GET, POST, and HEAD commands. These routines can
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# be used in untrusted code that uses the Safesock security policy.
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# These procedures use a callback interface to avoid using vwait, which
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# is not defined in the safe base.
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#
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# See the file "license.terms" for information on usage and redistribution of
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# this file, and for a DISCLAIMER OF ALL WARRANTIES.
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package require Tcl 8.6-
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# Keep this in sync with pkgIndex.tcl and with the install directories in
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# Makefiles
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package provide http 2.8.12
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namespace eval http {
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# Allow resourcing to not clobber existing data
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variable http
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if {![info exists http]} {
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array set http {
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-accept */*
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-proxyhost {}
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-proxyport {}
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-proxyfilter http::ProxyRequired
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-urlencoding utf-8
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}
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# We need a useragent string of this style or various servers will refuse to
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# send us compressed content even when we ask for it. This follows the
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# de-facto layout of user-agent strings in current browsers.
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# Safe interpreters do not have ::tcl_platform(os) or
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# ::tcl_platform(osVersion).
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if {[interp issafe]} {
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set http(-useragent) "Mozilla/5.0\
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(Windows; U;\
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Windows NT 10.0)\
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http/[package provide http] Tcl/[package provide Tcl]"
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} else {
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set http(-useragent) "Mozilla/5.0\
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([string totitle $::tcl_platform(platform)]; U;\
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$::tcl_platform(os) $::tcl_platform(osVersion))\
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http/[package provide http] Tcl/[package provide Tcl]"
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}
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}
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proc init {} {
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# Set up the map for quoting chars. RFC3986 Section 2.3 say percent
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# encode all except: "... percent-encoded octets in the ranges of
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# ALPHA (%41-%5A and %61-%7A), DIGIT (%30-%39), hyphen (%2D), period
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# (%2E), underscore (%5F), or tilde (%7E) should not be created by URI
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# producers ..."
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for {set i 0} {$i <= 256} {incr i} {
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set c [format %c $i]
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if {![string match {[-._~a-zA-Z0-9]} $c]} {
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set map($c) %[format %.2X $i]
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}
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}
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# These are handled specially
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set map(\n) %0D%0A
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variable formMap [array get map]
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# Create a map for HTTP/1.1 open sockets
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variable socketmap
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if {[info exists socketmap]} {
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# Close but don't remove open sockets on re-init
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foreach {url sock} [array get socketmap] {
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catch {close $sock}
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}
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}
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array set socketmap {}
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}
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init
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variable urlTypes
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if {![info exists urlTypes]} {
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set urlTypes(http) [list 80 ::socket]
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}
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variable encodings [string tolower [encoding names]]
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# This can be changed, but iso8859-1 is the RFC standard.
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variable defaultCharset
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if {![info exists defaultCharset]} {
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set defaultCharset "iso8859-1"
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}
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# Force RFC 3986 strictness in geturl url verification?
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variable strict
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if {![info exists strict]} {
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set strict 1
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}
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# Let user control default keepalive for compatibility
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variable defaultKeepalive
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if {![info exists defaultKeepalive]} {
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set defaultKeepalive 0
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}
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namespace export geturl config reset wait formatQuery register unregister
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# Useful, but not exported: data size status code
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}
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# http::Log --
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#
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# Debugging output -- define this to observe HTTP/1.1 socket usage.
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# Should echo any args received.
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#
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# Arguments:
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# msg Message to output
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#
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if {[info command http::Log] eq {}} {proc http::Log {args} {}}
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# http::register --
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#
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# See documentation for details.
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#
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# Arguments:
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# proto URL protocol prefix, e.g. https
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# port Default port for protocol
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# command Command to use to create socket
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# Results:
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# list of port and command that was registered.
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proc http::register {proto port command} {
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variable urlTypes
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set urlTypes([string tolower $proto]) [list $port $command]
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}
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# http::unregister --
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#
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# Unregisters URL protocol handler
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#
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# Arguments:
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# proto URL protocol prefix, e.g. https
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# Results:
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# list of port and command that was unregistered.
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proc http::unregister {proto} {
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variable urlTypes
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set lower [string tolower $proto]
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if {![info exists urlTypes($lower)]} {
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return -code error "unsupported url type \"$proto\""
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}
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set old $urlTypes($lower)
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unset urlTypes($lower)
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return $old
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}
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# http::config --
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#
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# See documentation for details.
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#
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# Arguments:
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# args Options parsed by the procedure.
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# Results:
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# TODO
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proc http::config {args} {
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variable http
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set options [lsort [array names http -*]]
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set usage [join $options ", "]
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if {[llength $args] == 0} {
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set result {}
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foreach name $options {
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lappend result $name $http($name)
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}
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return $result
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}
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set options [string map {- ""} $options]
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set pat ^-(?:[join $options |])$
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if {[llength $args] == 1} {
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set flag [lindex $args 0]
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if {![regexp -- $pat $flag]} {
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return -code error "Unknown option $flag, must be: $usage"
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}
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return $http($flag)
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} else {
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foreach {flag value} $args {
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if {![regexp -- $pat $flag]} {
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return -code error "Unknown option $flag, must be: $usage"
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}
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set http($flag) $value
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}
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}
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}
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# http::Finish --
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#
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# Clean up the socket and eval close time callbacks
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#
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# Arguments:
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# token Connection token.
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# errormsg (optional) If set, forces status to error.
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# skipCB (optional) If set, don't call the -command callback. This
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# is useful when geturl wants to throw an exception instead
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# of calling the callback. That way, the same error isn't
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# reported to two places.
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#
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# Side Effects:
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# Closes the socket
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proc http::Finish {token {errormsg ""} {skipCB 0}} {
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variable $token
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upvar 0 $token state
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global errorInfo errorCode
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if {$errormsg ne ""} {
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set state(error) [list $errormsg $errorInfo $errorCode]
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set state(status) "error"
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}
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if { ($state(status) eq "timeout")
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|| ($state(status) eq "error")
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|| ([info exists state(-keepalive)] && !$state(-keepalive))
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|| ([info exists state(connection)] && ($state(connection) eq "close"))
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} {
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CloseSocket $state(sock) $token
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}
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if {[info exists state(after)]} {
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after cancel $state(after)
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}
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if {[info exists state(-command)] && !$skipCB
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&& ![info exists state(done-command-cb)]} {
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set state(done-command-cb) yes
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if {[catch {eval $state(-command) {$token}} err] && $errormsg eq ""} {
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set state(error) [list $err $errorInfo $errorCode]
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set state(status) error
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}
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}
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}
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# http::CloseSocket -
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#
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# Close a socket and remove it from the persistent sockets table. If
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# possible an http token is included here but when we are called from a
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# fileevent on remote closure we need to find the correct entry - hence
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# the second section.
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proc ::http::CloseSocket {s {token {}}} {
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variable socketmap
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catch {fileevent $s readable {}}
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set conn_id {}
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if {$token ne ""} {
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variable $token
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upvar 0 $token state
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if {[info exists state(socketinfo)]} {
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set conn_id $state(socketinfo)
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}
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} else {
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set map [array get socketmap]
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set ndx [lsearch -exact $map $s]
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if {$ndx != -1} {
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incr ndx -1
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set conn_id [lindex $map $ndx]
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}
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}
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if {$conn_id eq {} || ![info exists socketmap($conn_id)]} {
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Log "Closing socket $s (no connection info)"
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if {[catch {close $s} err]} {
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Log "Error: $err"
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}
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} else {
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if {[info exists socketmap($conn_id)]} {
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Log "Closing connection $conn_id (sock $socketmap($conn_id))"
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if {[catch {close $socketmap($conn_id)} err]} {
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Log "Error: $err"
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}
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unset socketmap($conn_id)
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} else {
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Log "Cannot close connection $conn_id - no socket in socket map"
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}
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}
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}
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# http::reset --
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#
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# See documentation for details.
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#
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# Arguments:
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# token Connection token.
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# why Status info.
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#
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# Side Effects:
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# See Finish
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proc http::reset {token {why reset}} {
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variable $token
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upvar 0 $token state
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set state(status) $why
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catch {fileevent $state(sock) readable {}}
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catch {fileevent $state(sock) writable {}}
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Finish $token
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if {[info exists state(error)]} {
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set errorlist $state(error)
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unset state
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eval ::error $errorlist
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}
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}
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# http::geturl --
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#
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# Establishes a connection to a remote url via http.
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#
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# Arguments:
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# url The http URL to goget.
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# args Option value pairs. Valid options include:
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# -blocksize, -validate, -headers, -timeout
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# Results:
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# Returns a token for this connection. This token is the name of an
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# array that the caller should unset to garbage collect the state.
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proc http::geturl {url args} {
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variable http
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variable urlTypes
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variable defaultCharset
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variable defaultKeepalive
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variable strict
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# Initialize the state variable, an array. We'll return the name of this
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# array as the token for the transaction.
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if {![info exists http(uid)]} {
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set http(uid) 0
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}
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set token [namespace current]::[incr http(uid)]
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variable $token
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upvar 0 $token state
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reset $token
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# Process command options.
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array set state {
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-binary false
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-blocksize 8192
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-queryblocksize 8192
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-validate 0
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-headers {}
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-timeout 0
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-type application/x-www-form-urlencoded
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-queryprogress {}
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-protocol 1.1
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binary 0
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state connecting
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meta {}
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coding {}
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currentsize 0
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totalsize 0
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querylength 0
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queryoffset 0
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type text/html
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body {}
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status ""
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http ""
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connection close
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}
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set state(-keepalive) $defaultKeepalive
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set state(-strict) $strict
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# These flags have their types verified [Bug 811170]
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array set type {
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-binary boolean
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-blocksize integer
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-queryblocksize integer
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-strict boolean
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-timeout integer
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-validate boolean
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}
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set state(charset) $defaultCharset
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set options {
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-binary -blocksize -channel -command -handler -headers -keepalive
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-method -myaddr -progress -protocol -query -queryblocksize
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-querychannel -queryprogress -strict -timeout -type -validate
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}
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set usage [join [lsort $options] ", "]
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set options [string map {- ""} $options]
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set pat ^-(?:[join $options |])$
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foreach {flag value} $args {
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if {[regexp -- $pat $flag]} {
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# Validate numbers
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if {
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[info exists type($flag)] &&
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![string is $type($flag) -strict $value]
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} {
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unset $token
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return -code error \
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"Bad value for $flag ($value), must be $type($flag)"
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}
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set state($flag) $value
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} else {
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unset $token
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return -code error "Unknown option $flag, can be: $usage"
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}
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}
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# Make sure -query and -querychannel aren't both specified
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set isQueryChannel [info exists state(-querychannel)]
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set isQuery [info exists state(-query)]
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if {$isQuery && $isQueryChannel} {
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unset $token
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return -code error "Can't combine -query and -querychannel options!"
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}
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# Validate URL, determine the server host and port, and check proxy case
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# Recognize user:pass@host URLs also, although we do not do anything with
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# that info yet.
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# URLs have basically four parts.
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# First, before the colon, is the protocol scheme (e.g. http)
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# Second, for HTTP-like protocols, is the authority
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# The authority is preceded by // and lasts up to (but not including)
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# the following / or ? and it identifies up to four parts, of which
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# only one, the host, is required (if an authority is present at all).
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# All other parts of the authority (user name, password, port number)
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# are optional.
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# Third is the resource name, which is split into two parts at a ?
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# The first part (from the single "/" up to "?") is the path, and the
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# second part (from that "?" up to "#") is the query. *HOWEVER*, we do
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# not need to separate them; we send the whole lot to the server.
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# Both, path and query are allowed to be missing, including their
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# delimiting character.
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# Fourth is the fragment identifier, which is everything after the first
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# "#" in the URL. The fragment identifier MUST NOT be sent to the server
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# and indeed, we don't bother to validate it (it could be an error to
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# pass it in here, but it's cheap to strip).
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#
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# An example of a URL that has all the parts:
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#
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# http://jschmoe:xyzzy@www.bogus.net:8000/foo/bar.tml?q=foo#changes
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#
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# The "http" is the protocol, the user is "jschmoe", the password is
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# "xyzzy", the host is "www.bogus.net", the port is "8000", the path is
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# "/foo/bar.tml", the query is "q=foo", and the fragment is "changes".
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#
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# Note that the RE actually combines the user and password parts, as
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# recommended in RFC 3986. Indeed, that RFC states that putting passwords
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# in URLs is a Really Bad Idea, something with which I would agree utterly.
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#
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# From a validation perspective, we need to ensure that the parts of the
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# URL that are going to the server are correctly encoded. This is only
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# done if $state(-strict) is true (inherited from $::http::strict).
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set URLmatcher {(?x) # this is _expanded_ syntax
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^
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(?: (\w+) : ) ? # <protocol scheme>
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|
(?: //
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(?:
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|
(
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|
[^@/\#?]+ # <userinfo part of authority>
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|
) @
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)?
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|
( # <host part of authority>
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|
[^/:\#?]+ | # host name or IPv4 address
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|
\[ [^/\#?]+ \] # IPv6 address in square brackets
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)
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|
(?: : (\d+) )? # <port part of authority>
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|
)?
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|
( [/\?] [^\#]*)? # <path> (including query)
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(?: \# (.*) )? # <fragment>
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$
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}
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|
# Phase one: parse
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if {![regexp -- $URLmatcher $url -> proto user host port srvurl]} {
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unset $token
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return -code error "Unsupported URL: $url"
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|
}
|
|
# Phase two: validate
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set host [string trim $host {[]}]; # strip square brackets from IPv6 address
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|
if {$host eq ""} {
|
|
# Caller has to provide a host name; we do not have a "default host"
|
|
# that would enable us to handle relative URLs.
|
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unset $token
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return -code error "Missing host part: $url"
|
|
# Note that we don't check the hostname for validity here; if it's
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# invalid, we'll simply fail to resolve it later on.
|
|
}
|
|
if {$port ne "" && $port > 65535} {
|
|
unset $token
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|
return -code error "Invalid port number: $port"
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|
}
|
|
# The user identification and resource identification parts of the URL can
|
|
# have encoded characters in them; take care!
|
|
if {$user ne ""} {
|
|
# Check for validity according to RFC 3986, Appendix A
|
|
set validityRE {(?xi)
|
|
^
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|
(?: [-\w.~!$&'()*+,;=:] | %[0-9a-f][0-9a-f] )+
|
|
$
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|
}
|
|
if {$state(-strict) && ![regexp -- $validityRE $user]} {
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|
unset $token
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|
# 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.
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|
if {[string index $srvurl 0] ne "/"} {
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set srvurl /$srvurl
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|
}
|
|
# Check for validity according to RFC 3986, Appendix A
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|
set validityRE {(?xi)
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|
^
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|
# Path part (already must start with / character)
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|
(?: [-\w.~!$&'()*+,;=:@/] | %[0-9a-f][0-9a-f] )*
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|
# Query part (optional, permits ? characters)
|
|
(?: \? (?: [-\w.~!$&'()*+,;=:@/?] | %[0-9a-f][0-9a-f] )* )?
|
|
$
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|
}
|
|
if {$state(-strict) && ![regexp -- $validityRE $srvurl]} {
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|
unset $token
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|
# 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 /
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|
}
|
|
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) $url
|
|
|
|
# If a timeout is specified we set up the after event and arrange for an
|
|
# asynchronous socket connection.
|
|
|
|
set sockopts [list -async]
|
|
if {$state(-timeout) > 0} {
|
|
set state(after) [after $state(-timeout) \
|
|
[list http::reset $token timeout]]
|
|
}
|
|
|
|
# If we are using the proxy, we must pass in the full URL that includes
|
|
# the server name.
|
|
|
|
if {[info exists phost] && ($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) $http(-accept)
|
|
|
|
# See if we are supposed to use a previously opened channel.
|
|
if {$state(-keepalive)} {
|
|
variable socketmap
|
|
if {[info exists socketmap($state(socketinfo))]} {
|
|
if {[catch {fconfigure $socketmap($state(socketinfo))}]} {
|
|
Log "WARNING: socket for $state(socketinfo) was closed"
|
|
unset socketmap($state(socketinfo))
|
|
} else {
|
|
set sock $socketmap($state(socketinfo))
|
|
Log "reusing socket $sock for $state(socketinfo)"
|
|
catch {fileevent $sock writable {}}
|
|
catch {fileevent $sock readable {}}
|
|
}
|
|
}
|
|
# don't automatically close this connection socket
|
|
set state(connection) {}
|
|
}
|
|
if {![info exists sock]} {
|
|
# Pass -myaddr directly to the socket command
|
|
if {[info exists state(-myaddr)]} {
|
|
lappend sockopts -myaddr $state(-myaddr)
|
|
}
|
|
if {[catch {eval $defcmd $sockopts $targetAddr} sock]} {
|
|
# 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) $sock
|
|
Finish $token "" 1
|
|
cleanup $token
|
|
return -code error $sock
|
|
}
|
|
}
|
|
set state(sock) $sock
|
|
Log "Using $sock for $state(socketinfo)" \
|
|
[expr {$state(-keepalive)?"keepalive":""}]
|
|
if {$state(-keepalive)} {
|
|
set socketmap($state(socketinfo)) $sock
|
|
}
|
|
|
|
if {![info exists phost]} {
|
|
set phost ""
|
|
}
|
|
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
|
|
}
|
|
}
|
|
|
|
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 $token
|
|
upvar 0 $token state
|
|
|
|
# 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
|
|
|
|
fconfigure $sock -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 $sock -blocking off}
|
|
set how GET
|
|
if {$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.
|
|
fconfigure $state(-querychannel) -blocking 1 -translation 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
|
|
if {[catch {
|
|
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)} {
|
|
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)]} {
|
|
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 || $isQueryChannel} {
|
|
if {!$content_type_seen} {
|
|
puts $sock "Content-Type: $state(-type)"
|
|
}
|
|
if {!$contDone} {
|
|
puts $sock "Content-Length: $state(querylength)"
|
|
}
|
|
puts $sock ""
|
|
fconfigure $sock -translation {auto binary}
|
|
fileevent $sock writable [list http::Write $token]
|
|
} else {
|
|
puts $sock ""
|
|
flush $sock
|
|
fileevent $sock readable [list http::Event $sock $token]
|
|
}
|
|
|
|
} err]} {
|
|
# The socket probably was never connected, or the connection dropped
|
|
# later.
|
|
|
|
# if state(status) is error, it means someone's already called Finish
|
|
# to do the above-described clean up.
|
|
if {$state(status) ne "error"} {
|
|
Finish $token $err
|
|
}
|
|
}
|
|
}
|
|
|
|
# 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 proto phost srvurl} {
|
|
variable $token
|
|
upvar 0 $token state
|
|
set err "due to unexpected EOF"
|
|
if {
|
|
[eof $state(sock)] ||
|
|
[set err [fconfigure $state(sock) -error]] ne ""
|
|
} {
|
|
Finish $token "connect failed $err"
|
|
} else {
|
|
fileevent $state(sock) writable {}
|
|
::http::Connected $token $proto $phost $srvurl
|
|
}
|
|
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 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.
|
|
|
|
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)]
|
|
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 {}
|
|
fileevent $sock readable [list http::Event $sock $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
|
|
# 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 $token
|
|
upvar 0 $token state
|
|
|
|
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"
|
|
}
|
|
}
|
|
CloseSocket $sock
|
|
return
|
|
}
|
|
if {$state(state) eq "connecting"} {
|
|
if {[catch {gets $sock state(http)} n]} {
|
|
return [Finish $token $n]
|
|
} elseif {$n >= 0} {
|
|
set state(state) "header"
|
|
}
|
|
} elseif {$state(state) eq "header"} {
|
|
if {[catch {gets $sock line} n]} {
|
|
return [Finish $token $n]
|
|
} elseif {$n == 0} {
|
|
# 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] && $x == 100)} {
|
|
set state(state) "connecting"
|
|
return
|
|
}
|
|
|
|
set state(state) body
|
|
|
|
# If doing a HEAD, then we won't get any body
|
|
if {$state(-validate)} {
|
|
Eof $token
|
|
return
|
|
}
|
|
|
|
# For non-chunked transfer we may have no body - in this case we
|
|
# may get no further file event if the connection doesn't close
|
|
# and no more data is sent. We can tell and must finish up now -
|
|
# not later.
|
|
if {
|
|
!(([info exists state(connection)]
|
|
&& ($state(connection) eq "close"))
|
|
|| [info exists state(transfer)])
|
|
&& ($state(totalsize) == 0)
|
|
} {
|
|
Log "body size is 0 and no events likely - complete."
|
|
Eof $token
|
|
return
|
|
}
|
|
|
|
# We have to use binary translation to count bytes properly.
|
|
fconfigure $sock -translation binary
|
|
|
|
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 {}
|
|
CopyStart $sock $token
|
|
return
|
|
}
|
|
}
|
|
} elseif {$n > 0} {
|
|
# Process header lines
|
|
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
|
|
if {[catch {
|
|
if {[info exists state(-handler)]} {
|
|
set n [eval $state(-handler) [list $sock $token]]
|
|
} elseif {[info exists state(transfer_final)]} {
|
|
set line [getTextLine $sock]
|
|
set n [string length $line]
|
|
if {$n > 0} {
|
|
Log "found $n bytes following final chunk"
|
|
append state(transfer_final) $line
|
|
} else {
|
|
Log "final chunk part"
|
|
Eof $token
|
|
}
|
|
} elseif {
|
|
[info exists state(transfer)]
|
|
&& $state(transfer) eq "chunked"
|
|
} {
|
|
set size 0
|
|
set chunk [getTextLine $sock]
|
|
set n [string length $chunk]
|
|
if {[string trim $chunk] ne ""} {
|
|
scan $chunk %x size
|
|
if {$size != 0} {
|
|
set bl [fconfigure $sock -blocking]
|
|
fconfigure $sock -blocking 1
|
|
set chunk [read $sock $size]
|
|
fconfigure $sock -blocking $bl
|
|
set n [string length $chunk]
|
|
if {$n >= 0} {
|
|
append state(body) $chunk
|
|
}
|
|
if {$size != [string length $chunk]} {
|
|
Log "WARNING: mis-sized chunk:\
|
|
was [string length $chunk], should be $size"
|
|
}
|
|
getTextLine $sock
|
|
} else {
|
|
set state(transfer_final) {}
|
|
}
|
|
}
|
|
} else {
|
|
#Log "read non-chunk $state(currentsize) of $state(totalsize)"
|
|
set block [read $sock $state(-blocksize)]
|
|
set n [string length $block]
|
|
if {$n >= 0} {
|
|
append state(body) $block
|
|
}
|
|
}
|
|
if {[info exists state]} {
|
|
if {$n >= 0} {
|
|
incr state(currentsize) $n
|
|
}
|
|
# If Content-Length - check for end of data.
|
|
if {
|
|
($state(totalsize) > 0)
|
|
&& ($state(currentsize) >= $state(totalsize))
|
|
} {
|
|
Eof $token
|
|
}
|
|
}
|
|
} err]} {
|
|
return [Finish $token $err]
|
|
} else {
|
|
if {[info exists state(-progress)]} {
|
|
eval $state(-progress) \
|
|
[list $token $state(totalsize) $state(currentsize)]
|
|
}
|
|
}
|
|
}
|
|
|
|
# catch as an Eof above may have closed the socket already
|
|
if {![catch {eof $sock} eof] && $eof} {
|
|
if {[info exists $token]} {
|
|
set state(connection) close
|
|
Eof $token
|
|
} else {
|
|
# open connection closed on a token that has been cleaned up.
|
|
CloseSocket $sock
|
|
}
|
|
return
|
|
}
|
|
}
|
|
|
|
# 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 blocking crlf mode
|
|
#
|
|
# Arguments
|
|
# sock The socket receiving input.
|
|
#
|
|
# Results:
|
|
# The line of text, without trailing newline
|
|
|
|
proc http::getTextLine {sock} {
|
|
set tr [fconfigure $sock -translation]
|
|
set bl [fconfigure $sock -blocking]
|
|
fconfigure $sock -translation crlf -blocking 1
|
|
set r [gets $sock]
|
|
fconfigure $sock -translation $tr -blocking $bl
|
|
return $r
|
|
}
|
|
|
|
# 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 {
|
|
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"
|
|
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.
|
|
}
|
|
}
|
|
|
|
# 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} {
|
|
Eof $token
|
|
} else {
|
|
CopyStart $sock $token 0
|
|
}
|
|
}
|
|
|
|
# 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 {force 0}} {
|
|
variable $token
|
|
upvar 0 $token state
|
|
if {$state(state) eq "header"} {
|
|
# Premature eof
|
|
set state(status) eof
|
|
} else {
|
|
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: $err"
|
|
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.
|
|
|
|
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
|
|
}
|
|
|
|
# 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} {
|
|
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
|
|
}
|
|
|
|
# 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::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:
|
|
# indent-tabs-mode: t
|
|
# End:
|