+++ /dev/null
-# 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 http.n man page for documentation
-
-package provide http 1.0
-
-array set http {
- -accept */*
- -proxyhost {}
- -proxyport {}
- -useragent {Tcl http client package 1.0}
- -proxyfilter httpProxyRequired
-}
-proc http_config {args} {
- global 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
- }
- regsub -all -- - $options {} 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"
- }
- }
- }
-}
-
- proc httpFinish { token {errormsg ""} } {
- 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)]} {
- if {[catch {eval $state(-command) {$token}} err]} {
- if {[string length $errormsg] == 0} {
- set state(error) [list $err $errorInfo $errorCode]
- set state(status) error
- }
- }
- unset state(-command)
- }
-}
-proc http_reset { token {why reset} } {
- upvar #0 $token state
- set state(status) $why
- catch {fileevent $state(sock) readable {}}
- httpFinish $token
- if {[info exists state(error)]} {
- set errorlist $state(error)
- unset state(error)
- eval error $errorlist
- }
-}
-proc http_get { url args } {
- global http
- if {![info exists http(uid)]} {
- set http(uid) 0
- }
- set token http#[incr http(uid)]
- upvar #0 $token state
- http_reset $token
- array set state {
- -blocksize 8192
- -validate 0
- -headers {}
- -timeout 0
- state header
- meta {}
- currentsize 0
- totalsize 0
- type text/html
- body {}
- status ""
- }
- set options {-blocksize -channel -command -handler -headers \
- -progress -query -validate -timeout}
- set usage [join $options ", "]
- regsub -all -- - $options {} options
- set pat ^-([join $options |])$
- foreach {flag value} $args {
- if {[regexp $pat $flag]} {
- # Validate numbers
- if {[info exists state($flag)] && \
- [regexp {^[0-9]+$} $state($flag)] && \
- ![regexp {^[0-9]+$} $value]} {
- return -code error "Bad value for $flag ($value), must be integer"
- }
- set state($flag) $value
- } else {
- return -code error "Unknown option $flag, can be: $usage"
- }
- }
- if {! [regexp -nocase {^(http://)?([^/:]+)(:([0-9]+))?(/.*)?$} $url \
- x proto host y port srvurl]} {
- error "Unsupported URL: $url"
- }
- if {[string length $port] == 0} {
- set port 80
- }
- if {[string length $srvurl] == 0} {
- set srvurl /
- }
- if {[string length $proto] == 0} {
- set url http://$url
- }
- set state(url) $url
- if {![catch {$http(-proxyfilter) $host} proxy]} {
- set phost [lindex $proxy 0]
- set pport [lindex $proxy 1]
- }
- if {$state(-timeout) > 0} {
- set state(after) [after $state(-timeout) [list http_reset $token timeout]]
- }
- if {[info exists phost] && [string length $phost]} {
- set srvurl $url
- set s [socket $phost $pport]
- } else {
- set s [socket $host $port]
- }
- set state(sock) $s
-
- # 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 len 0
- set how GET
- if {[info exists state(-query)]} {
- set len [string length $state(-query)]
- if {$len > 0} {
- set how POST
- }
- } elseif {$state(-validate)} {
- set how HEAD
- }
- puts $s "$how $srvurl HTTP/1.0"
- puts $s "Accept: $http(-accept)"
- puts $s "Host: $host"
- puts $s "User-Agent: $http(-useragent)"
- foreach {key value} $state(-headers) {
- regsub -all \[\n\r\] $value {} value
- set key [string trim $key]
- if {[string length $key]} {
- puts $s "$key: $value"
- }
- }
- if {$len > 0} {
- puts $s "Content-Length: $len"
- puts $s "Content-Type: application/x-www-form-urlencoded"
- puts $s ""
- fconfigure $s -translation {auto binary}
- puts -nonewline $s $state(-query)
- } else {
- puts $s ""
- }
- flush $s
- fileevent $s readable [list httpEvent $token]
- if {! [info exists state(-command)]} {
- http_wait $token
- }
- return $token
-}
-proc http_data {token} {
- upvar #0 $token state
- return $state(body)
-}
-proc http_status {token} {
- upvar #0 $token state
- return $state(status)
-}
-proc http_code {token} {
- upvar #0 $token state
- return $state(http)
-}
-proc http_size {token} {
- upvar #0 $token state
- return $state(currentsize)
-}
-
- proc httpEvent {token} {
- upvar #0 $token state
- set s $state(sock)
-
- if {[eof $s]} {
- httpEof $token
- return
- }
- if {$state(state) == "header"} {
- set n [gets $s line]
- if {$n == 0} {
- set state(state) body
- if {![regexp -nocase ^text $state(type)]} {
- # Turn off conversions for non-text data
- fconfigure $s -translation binary
- if {[info exists state(-channel)]} {
- fconfigure $state(-channel) -translation binary
- }
- }
- if {[info exists state(-channel)] &&
- ![info exists state(-handler)]} {
- # Initiate a sequence of background fcopies
- fileevent $s readable {}
- httpCopyStart $s $token
- }
- } elseif {$n > 0} {
- if {[regexp -nocase {^content-type:(.+)$} $line x type]} {
- set state(type) [string trim $type]
- }
- if {[regexp -nocase {^content-length:(.+)$} $line x length]} {
- set state(totalsize) [string trim $length]
- }
- if {[regexp -nocase {^([^:]+):(.+)$} $line x key value]} {
- lappend state(meta) $key $value
- } elseif {[regexp ^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]} {
- httpFinish $token $err
- } else {
- if {[info exists state(-progress)]} {
- eval $state(-progress) {$token $state(totalsize) $state(currentsize)}
- }
- }
- }
-}
- proc httpCopyStart {s token} {
- upvar #0 $token state
- if {[catch {
- fcopy $s $state(-channel) -size $state(-blocksize) -command \
- [list httpCopyDone $token]
- } err]} {
- httpFinish $token $err
- }
-}
- proc httpCopyDone {token count {error {}}} {
- 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)}
- }
- if {([string length $error] != 0)} {
- httpFinish $token $error
- } elseif {[eof $s]} {
- httpEof $token
- } else {
- httpCopyStart $s $token
- }
-}
- proc httpEof {token} {
- upvar #0 $token state
- if {$state(state) == "header"} {
- # Premature eof
- set state(status) eof
- } else {
- set state(status) ok
- }
- set state(state) eof
- httpFinish $token
-}
-proc http_wait {token} {
- upvar #0 $token state
- if {![info exists state(status)] || [string length $state(status)] == 0} {
- vwait $token\(status)
- }
- if {[info exists state(error)]} {
- set errorlist $state(error)
- unset state(error)
- eval error $errorlist
- }
- return $state(status)
-}
-
-# 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.
-
-proc http_formatQuery {args} {
- set result ""
- set sep ""
- foreach i $args {
- append result $sep [httpMapReply $i]
- if {$sep != "="} {
- set sep =
- } else {
- set sep &
- }
- }
- return $result
-}
-
-# do x-www-urlencoded character mapping
-# The spec says: "non-alphanumeric characters are replaced by '%HH'"
-# 1 leave alphanumerics characters alone
-# 2 Convert every other character to an array lookup
-# 3 Escape constructs that are "special" to the tcl parser
-# 4 "subst" the result, doing all the array substitutions
-
- proc httpMapReply {string} {
- global httpFormMap
- set alphanumeric a-zA-Z0-9
- if {![info exists httpFormMap]} {
-
- for {set i 1} {$i <= 256} {incr i} {
- set c [format %c $i]
- if {![string match \[$alphanumeric\] $c]} {
- set httpFormMap($c) %[format %.2x $i]
- }
- }
- # These are handled specially
- array set httpFormMap {
- " " + \n %0d%0a
- }
- }
- regsub -all \[^$alphanumeric\] $string {$httpFormMap(&)} string
- regsub -all \n $string {\\n} string
- regsub -all \t $string {\\t} string
- regsub -all {[][{})\\]\)} $string {\\&} string
- return [subst $string]
-}
-
-# Default proxy filter.
- proc httpProxyRequired {host} {
- global 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)]
- } else {
- return {}
- }
-}
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