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###
# Tool to download file from the web
# Enhacements to http
###
package provide http::wget 0.1
package require http
::namespace eval ::http {}
###
# topic: 1ed971e03ae89415e2f25d20e59b765c
# description: this proc contributed by Donal Fellows
###
proc ::http::_followRedirects {url args} {
while 1 {
set token [geturl $url -validate 1]
set ncode [ncode $token]
if { $ncode eq "404" } {
error "URL Not found"
}
switch -glob $ncode {
30[1237] {### redirect - see below ###}
default {cleanup $token ; return $url}
}
upvar #0 $token state
array set meta [set ${token}(meta)]
cleanup $token
if {![info exists meta(Location)]} {
return $url
}
set url $meta(Location)
unset meta
}
return $url
}
###
# topic: fced7bc395596569ac225a719c686dcc
###
proc ::http::wget {url destfile {verbose 1}} {
set tmpchan [open $destfile w]
fconfigure $tmpchan -translation binary
if { $verbose } {
puts [list GETTING [file tail $destfile] from $url]
}
set real_url [_followRedirects $url]
set token [geturl $real_url -channel $tmpchan -binary yes]
if {[ncode $token] != "200"} {
error "DOWNLOAD FAILED"
}
cleanup $token
close $tmpchan
}
|
