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|
<?php
/*
+-----------------------------------------------------------------------+
| program/steps/utils/modcss.inc |
| |
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2007-2011, The Roundcube Dev Team |
| |
| Licensed under the GNU General Public License version 3 or |
| any later version with exceptions for skins & plugins. |
| See the README file for a full license statement. |
| |
| PURPOSE: |
| Modify CSS source from a URL |
| |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
*/
$source = '';
$url = preg_replace('![^a-z0-9.-]!i', '', $_GET['_u']);
if ($url === null || !($realurl = $_SESSION['modcssurls'][$url])) {
header('HTTP/1.1 403 Forbidden');
echo "Unauthorized request";
exit;
}
$a_uri = parse_url($realurl);
$port = $a_uri['port'] ? $a_uri['port'] : 80;
$host = $a_uri['host'];
$path = $a_uri['path'] . ($a_uri['query'] ? '?'.$a_uri['query'] : '');
// don't allow any other connections than http(s)
if (strtolower(substr($a_uri['scheme'], 0, 4)) != 'http') {
header('HTTP/1.1 403 Forbidden');
echo "Invalid URL";
exit;
}
// try to open socket connection
if (!($fp = fsockopen($host, $port, $errno, $error, 15))) {
header('HTTP/1.1 500 Internal Server Error');
echo $error;
exit;
}
// set timeout for socket
stream_set_timeout($fp, 30);
// send request
$out = "GET $path HTTP/1.0\r\n";
$out .= "Host: $host\r\n";
$out .= "Connection: Close\r\n\r\n";
fwrite($fp, $out);
// read response
$header = true;
$headers = array();
while (!feof($fp)) {
$line = trim(fgets($fp, 4048));
if ($header) {
if (preg_match('/^HTTP\/1\..\s+(\d+)/', $line, $regs)
&& intval($regs[1]) != 200) {
break;
}
else if (empty($line)) {
$header = false;
}
else {
list($key, $value) = explode(': ', $line);
$headers[strtolower($key)] = $value;
}
}
else {
$source .= "$line\n";
}
}
fclose($fp);
// check content-type header and mod styles
$mimetype = strtolower($headers['content-type']);
if (!empty($source) && in_array($mimetype, array('text/css','text/plain'))) {
header('Content-Type: text/css');
echo rcmail_mod_css_styles($source, preg_replace('/[^a-z0-9]/i', '', $_GET['_c']));
exit;
}
else
$error = "Invalid response returned by server";
header('HTTP/1.0 404 Not Found');
echo $error;
exit;
|
