modcss.php
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<?php
/**
+-----------------------------------------------------------------------+
| This file is part of the Roundcube Webmail client |
| |
| Copyright (C) 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> |
+-----------------------------------------------------------------------+
*/
class rcmail_action_utils_modcss extends rcmail_action
{
/**
* Request handler.
*
* @param array $args Arguments from the previous step(s)
*/
public function run($args = [])
{
$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");
}
$source = false;
$ctype = null;
try {
$client = rcube::get_instance()->get_http_client();
$response = $client->get($realurl);
if (!empty($response)) {
$ctype = $response->getHeader('Content-Type');
$ctype = !empty($ctype) ? $ctype[0] : '';
$source = $response->getBody();
}
}
catch (Exception $e) {
rcube::raise_error($e, true, false);
}
$ctype_regexp = '~^text/(css|plain)~i';
$container_id = isset($_GET['_c']) ? preg_replace('/[^a-z0-9]/i', '', $_GET['_c']) : '';
$css_prefix = isset($_GET['_p']) ? preg_replace('/[^a-z0-9]/i', '', $_GET['_p']) : '';
if ($source !== false && $ctype && preg_match($ctype_regexp, $ctype)) {
header('Content-Type: text/css');
echo rcube_utils::mod_css_styles($source, $container_id, false, $css_prefix);
exit;
}
header('HTTP/1.0 404 Not Found');
exit("Invalid response returned by server");
}
}