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#!/usr/local/bin/perl
#
## Copyright (C) 1996-2025 The Squid Software Foundation and contributors
##
## Squid software is distributed under GPLv2+ license and includes
## contributions from numerous individuals and organizations.
## Please see the COPYING and CONTRIBUTORS files for details.
##
require 'sys/socket.ph';
$url = shift || die "usage: $0: url\n";
$proxy = 'localhost';
$port = 3128;
$url = "http://$url/" if ($url =~ /^[-\w\.]+$/);
print "Querying cache path to $url\n";
$host = $1 if ($url =~ /^[^:]+:\/\/([^\/:]+)/);
$sockaddr = 'S n a4 x8';
($name, $aliases, $proto) = getprotobyname("tcp");
($fqdn, $aliases, $type, $len, $thataddr) = gethostbyname($proxy);
$thissock = pack($sockaddr, &AF_INET, 0, "\0\0\0\0");
$that = pack($sockaddr, &AF_INET, $port, $thataddr);
&try_http_11($url);
sub try_http_11 {
local($url) = @_;
local($path) = undef;
$source = $1 if ($url =~ /^[^:]+:\/\/([^:\/]+)/);
die "socket: $!\n" unless
socket (SOCK, &AF_INET, &SOCK_STREAM, $proto);
die "bind: $!\n" unless
bind (SOCK, $thissock);
die "$proxy:$port: $!\n" unless
connect (SOCK, $that);
select (SOCK); $| = 1;
select (STDOUT);
print SOCK "TRACE $url HTTP/1.1\r\nHost: $host\r\nAccept: */*\r\n\r\n";
while (<SOCK>) {
s/\r//g;
s/\n//g;
$code = $1 if (/^HTTP\/\d\.\d (\d+)/);
$server = $1 if (/^Server:\s*(.*)$/);
$path = $1 if (/^Via:\s*(.*)$/);
}
return 0 unless ($path && $code == 200);
print "Received TRACE reply from $source\n";
@F = split(',', $path);
$i = 0;
foreach $n (@F) {
$n =~ s/^\s+//;
printf " %2d %s\n", ++$i, $n;
}
printf " %2d %s (%s)\n", ++$i, $source, $server;
1;
}
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