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package provide http 1.0 |
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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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-useragent {Tcl http client package 1.0} |
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-proxyfilter httpProxyRequired |
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} |
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proc http_config {args} { |
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global 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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regsub -all -- - $options {} 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 $http($flag) |
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} else { |
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return -code error "Unknown option $flag, must be: $usage" |
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} |
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} else { |
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foreach {flag value} $args { |
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if {[regexp -- $pat $flag]} { |
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set http($flag) $value |
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} else { |
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return -code error "Unknown option $flag, must be: $usage" |
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} |
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} |
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} |
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} |
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proc httpFinish { token {errormsg ""} } { |
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upvar #0 $token state |
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global errorInfo errorCode |
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if {[string length $errormsg] != 0} { |
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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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catch {close $state(sock)} |
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catch {after cancel $state(after)} |
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if {[info exists state(-command)]} { |
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if {[catch {eval $state(-command) {$token}} err]} { |
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if {[string length $errormsg] == 0} { |
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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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unset state(-command) |
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} |
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} |
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proc http_reset { token {why reset} } { |
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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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httpFinish $token |
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if {[info exists state(error)]} { |
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set errorlist $state(error) |
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unset state(error) |
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eval error $errorlist |
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} |
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} |
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proc http_get { url args } { |
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global http |
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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 http#[incr http(uid)] |
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upvar #0 $token state |
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http_reset $token |
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array set state { |
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-blocksize 8192 |
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-validate 0 |
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-headers {} |
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-timeout 0 |
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state header |
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meta {} |
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currentsize 0 |
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totalsize 0 |
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type text/html |
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body {} |
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status "" |
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} |
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set options {-blocksize -channel -command -handler -headers \ |
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-progress -query -validate -timeout} |
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set usage [join $options ", "] |
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regsub -all -- - $options {} options |
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set pat ^-([join $options |])$ |
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foreach {flag value} $args { |
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if {[regexp $pat $flag]} { |
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if {[info exists state($flag)] && \ |
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[regexp {^[0-9]+$} $state($flag)] && \ |
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![regexp {^[0-9]+$} $value]} { |
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return -code error "Bad value for $flag ($value), must be integer" |
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} |
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set state($flag) $value |
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} else { |
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return -code error "Unknown option $flag, can be: $usage" |
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} |
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} |
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if {! [regexp -nocase {^(http://)?([^/:]+)(:([0-9]+))?(/.*)?$} $url \ |
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x proto host y port srvurl]} { |
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error "Unsupported URL: $url" |
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} |
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if {[string length $port] == 0} { |
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set port 80 |
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} |
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if {[string length $srvurl] == 0} { |
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set srvurl / |
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} |
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if {[string length $proto] == 0} { |
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set url http://$url |
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} |
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set state(url) $url |
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if {![catch {$http(-proxyfilter) $host} proxy]} { |
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set phost [lindex $proxy 0] |
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set pport [lindex $proxy 1] |
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} |
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if {$state(-timeout) > 0} { |
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set state(after) [after $state(-timeout) [list http_reset $token timeout]] |
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} |
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if {[info exists phost] && [string length $phost]} { |
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set srvurl $url |
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set s [socket $phost $pport] |
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} else { |
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set s [socket $host $port] |
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} |
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set state(sock) $s |
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fconfigure $s -translation {auto crlf} -buffersize $state(-blocksize) |
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catch {fconfigure $s -blocking off} |
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set len 0 |
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set how GET |
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if {[info exists state(-query)]} { |
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set len [string length $state(-query)] |
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if {$len > 0} { |
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set how POST |
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} |
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} elseif {$state(-validate)} { |
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set how HEAD |
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} |
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puts $s "$how $srvurl HTTP/1.0" |
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puts $s "Accept: $http(-accept)" |
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puts $s "Host: $host" |
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puts $s "User-Agent: $http(-useragent)" |
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foreach {key value} $state(-headers) { |
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regsub -all \[\n\r\] $value {} value |
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set key [string trim $key] |
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if {[string length $key]} { |
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puts $s "$key: $value" |
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} |
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} |
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if {$len > 0} { |
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puts $s "Content-Length: $len" |
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puts $s "Content-Type: application/x-www-form-urlencoded" |
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puts $s "" |
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fconfigure $s -translation {auto binary} |
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puts -nonewline $s $state(-query) |
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} else { |
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puts $s "" |
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} |
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flush $s |
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fileevent $s readable [list httpEvent $token] |
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if {! [info exists state(-command)]} { |
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http_wait $token |
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} |
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return $token |
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} |
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proc http_data {token} { |
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upvar #0 $token state |
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return $state(body) |
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} |
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proc http_status {token} { |
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upvar #0 $token state |
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return $state(status) |
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} |
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proc http_code {token} { |
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upvar #0 $token state |
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return $state(http) |
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} |
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proc http_size {token} { |
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upvar #0 $token state |
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return $state(currentsize) |
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} |
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proc httpEvent {token} { |
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upvar #0 $token state |
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set s $state(sock) |
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if {[eof $s]} { |
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httpEof $token |
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return |
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} |
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if {$state(state) == "header"} { |
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set n [gets $s line] |
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if {$n == 0} { |
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set state(state) body |
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if {![regexp -nocase ^text $state(type)]} { |
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fconfigure $s -translation binary |
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if {[info exists state(-channel)]} { |
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fconfigure $state(-channel) -translation binary |
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} |
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} |
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if {[info exists state(-channel)] && |
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![info exists state(-handler)]} { |
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fileevent $s readable {} |
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httpCopyStart $s $token |
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} |
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} elseif {$n > 0} { |
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if {[regexp -nocase {^content-type:(.+)$} $line x type]} { |
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set state(type) [string trim $type] |
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} |
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if {[regexp -nocase {^content-length:(.+)$} $line x length]} { |
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set state(totalsize) [string trim $length] |
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} |
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if {[regexp -nocase {^([^:]+):(.+)$} $line x key value]} { |
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lappend state(meta) $key $value |
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} elseif {[regexp ^HTTP $line]} { |
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set state(http) $line |
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} |
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} |
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} else { |
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if {[catch { |
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if {[info exists state(-handler)]} { |
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set n [eval $state(-handler) {$s $token}] |
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} else { |
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set block [read $s $state(-blocksize)] |
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set n [string length $block] |
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if {$n >= 0} { |
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append state(body) $block |
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} |
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} |
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if {$n >= 0} { |
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incr state(currentsize) $n |
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} |
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} err]} { |
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httpFinish $token $err |
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} else { |
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if {[info exists state(-progress)]} { |
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eval $state(-progress) {$token $state(totalsize) $state(currentsize)} |
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} |
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} |
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} |
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} |
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proc httpCopyStart {s token} { |
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upvar #0 $token state |
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if {[catch { |
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fcopy $s $state(-channel) -size $state(-blocksize) -command \ |
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[list httpCopyDone $token] |
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} err]} { |
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httpFinish $token $err |
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} |
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} |
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proc httpCopyDone {token count {error {}}} { |
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upvar #0 $token state |
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set s $state(sock) |
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incr state(currentsize) $count |
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if {[info exists state(-progress)]} { |
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eval $state(-progress) {$token $state(totalsize) $state(currentsize)} |
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} |
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if {([string length $error] != 0)} { |
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httpFinish $token $error |
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} elseif {[eof $s]} { |
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httpEof $token |
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} else { |
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httpCopyStart $s $token |
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} |
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} |
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proc httpEof {token} { |
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upvar #0 $token state |
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if {$state(state) == "header"} { |
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set state(status) eof |
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} else { |
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set state(status) ok |
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} |
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set state(state) eof |
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httpFinish $token |
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} |
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proc http_wait {token} { |
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upvar #0 $token state |
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if {![info exists state(status)] || [string length $state(status)] == 0} { |
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vwait $token\(status) |
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} |
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if {[info exists state(error)]} { |
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set errorlist $state(error) |
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unset state(error) |
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eval error $errorlist |
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} |
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return $state(status) |
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} |
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proc http_formatQuery {args} { |
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set result "" |
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set sep "" |
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foreach i $args { |
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append result $sep [httpMapReply $i] |
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if {$sep != "="} { |
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set sep = |
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} else { |
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set sep & |
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} |
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} |
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return $result |
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} |
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proc httpMapReply {string} { |
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global httpFormMap |
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set alphanumeric a-zA-Z0-9 |
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if {![info exists httpFormMap]} { |
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for {set i 1} {$i <= 256} {incr i} { |
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set c [format %c $i] |
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if {![string match \[$alphanumeric\] $c]} { |
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set httpFormMap($c) %[format %.2x $i] |
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} |
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} |
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array set httpFormMap { |
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" " + \n %0d%0a |
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} |
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} |
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regsub -all \[^$alphanumeric\] $string {$httpFormMap(&)} string |
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regsub -all \n $string {\\n} string |
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regsub -all \t $string {\\t} string |
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regsub -all {[][{})\\]\)} $string {\\&} string |
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return [subst $string] |
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} |
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proc httpProxyRequired {host} { |
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global http |
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if {[info exists http(-proxyhost)] && [string length $http(-proxyhost)]} { |
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if {![info exists http(-proxyport)] || ![string length $http(-proxyport)]} { |
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set http(-proxyport) 8080 |
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} |
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return [list $http(-proxyhost) $http(-proxyport)] |
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} else { |
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return {} |
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} |
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} |
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