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modcss.inc
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modcss.inc
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<?php
/*
+-----------------------------------------------------------------------+
| program/steps/utils/modcss.inc |
| |
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2007-2012, 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> |
| Author: Aleksander Machniak <alec@alec.pl> |
+-----------------------------------------------------------------------+
*/
$url = preg_replace('![^a-z0-9.-]!i', '', $_GET['_u']);
if ($url === null || !($realurl = $_SESSION['modcssurls'][$url])) {
header('HTTP/1.1 403 Forbidden');
exit("Unauthorized request");
}
// don't allow any other connections than http(s)
if (!preg_match('~^(https?)://~i', $realurl, $matches)) {
header('HTTP/1.1 403 Forbidden');
exit("Invalid URL");
}
if (!ini_get('allow_url_fopen')) {
header('HTTP/1.1 403 Forbidden');
exit("HTTP connections disabled");
}
$scheme = strtolower($matches[1]);
$options = array(
$scheme => array(
'method' => 'GET',
'timeout' => 15,
)
);
$context = stream_context_create($options);
$source = @file_get_contents($realurl, false, $context);
// php.net/manual/en/reserved.variables.httpresponseheader.php
$headers = implode("\n", (array)$http_response_header);
$ctype = '~Content-Type:\s+text/(css|plain)~i';
if ($source !== false && preg_match($ctype, $headers)) {
header('Content-Type: text/css');
echo rcmail_mod_css_styles($source, preg_replace('/[^a-z0-9]/i', '', $_GET['_c']));
exit;
}
header('HTTP/1.0 404 Not Found');
exit("Invalid response returned by server");

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