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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: |
| Provide basic functions for base URL replacement |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
*/
/**
* Helper class to turn relative urls into absolute ones
* using a predefined base
*
* @package Framework
* @subpackage Utils
*/
class rcube_base_replacer
{
private $base_url;
/**
* Class constructor
*
* @param string $base Base URL
*/
public function __construct($base)
{
$this->base_url = $base;
}
/**
* Replace callback
*
* @param array $matches Matching entries
*
* @return string Replaced text with absolute URL
*/
public function callback($matches)
{
return $matches[1] . '="' . self::absolute_url($matches[3], $this->base_url) . '"';
}
/**
* Convert base URLs to absolute ones
*
* @param string $body Text body
*
* @return string Replaced text
*/
public function replace($body)
{
$regexp = [
'/(src|background|href)=(["\']?)([^"\'\s>]+)(\2|\s|>)/i',
'/(url\s*\()(["\']?)([^"\'\)\s]+)(\2)\)/i',
];
return preg_replace_callback($regexp, [$this, 'callback'], $body);
}
/**
* Convert paths like ../xxx to an absolute path using a base url
*
* @param string $path Relative path
* @param string $base_url Base URL
*
* @return string Absolute URL
*/
public static function absolute_url($path, $base_url)
{
// check if path is an absolute URL
if (preg_match('/^[fhtps]+:\/\//', $path)) {
return $path;
}
// check if path is a content-id scheme
if (strpos($path, 'cid:') === 0) {
return $path;
}
$host_url = $base_url;
$abs_path = $path;
// cut base_url to the last directory
if (strrpos($base_url, '/') > 7) {
$host_url = substr($base_url, 0, strpos($base_url, '/', 7));
$base_url = substr($base_url, 0, strrpos($base_url, '/'));
}
// $path is absolute
if ($path && $path[0] == '/') {
$abs_path = $host_url . $path;
}
else {
// strip './' because its the same as ''
$path = preg_replace('/^\.\//', '', $path);
if (preg_match_all('/\.\.\//', $path, $matches, PREG_SET_ORDER)) {
$cnt = count($matches);
while ($cnt--) {
if ($pos = strrpos($base_url, '/')) {
$base_url = substr($base_url, 0, $pos);
}
$path = substr($path, 3);
}
}
$abs_path = $base_url.'/'.$path;
}
return $abs_path;
}
}
|
