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124 lines
3.6 KiB
PHP
124 lines
3.6 KiB
PHP
<?php
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/**
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+-----------------------------------------------------------------------+
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| This file is part of the Roundcube Webmail client |
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| Copyright (C) The Roundcube Dev Team |
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| Licensed under the GNU General Public License version 3 or |
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| any later version with exceptions for skins & plugins. |
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| See the README file for a full license statement. |
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| PURPOSE: |
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| Provide basic functions for base URL replacement |
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+-----------------------------------------------------------------------+
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| Author: Thomas Bruederli <roundcube@gmail.com> |
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+-----------------------------------------------------------------------+
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*/
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/**
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* Helper class to turn relative urls into absolute ones
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* using a predefined base
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*
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* @package Framework
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* @subpackage Utils
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*/
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class rcube_base_replacer
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{
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private $base_url;
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/**
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* Class constructor
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*
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* @param string $base Base URL
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*/
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public function __construct($base)
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{
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$this->base_url = $base;
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}
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/**
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* Replace callback
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*
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* @param array $matches Matching entries
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*
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* @return string Replaced text with absolute URL
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*/
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public function callback($matches)
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{
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return $matches[1] . '="' . self::absolute_url($matches[3], $this->base_url) . '"';
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}
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/**
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* Convert base URLs to absolute ones
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*
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* @param string $body Text body
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*
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* @return string Replaced text
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*/
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public function replace($body)
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{
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$regexp = array(
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'/(src|background|href)=(["\']?)([^"\'\s>]+)(\2|\s|>)/i',
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'/(url\s*\()(["\']?)([^"\'\)\s]+)(\2)\)/i',
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);
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return preg_replace_callback($regexp, array($this, 'callback'), $body);
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}
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/**
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* Convert paths like ../xxx to an absolute path using a base url
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*
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* @param string $path Relative path
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* @param string $base_url Base URL
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*
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* @return string Absolute URL
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*/
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public static function absolute_url($path, $base_url)
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{
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// check if path is an absolute URL
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if (preg_match('/^[fhtps]+:\/\//', $path)) {
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return $path;
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}
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// check if path is a content-id scheme
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if (strpos($path, 'cid:') === 0) {
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return $path;
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}
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$host_url = $base_url;
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$abs_path = $path;
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// cut base_url to the last directory
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if (strrpos($base_url, '/') > 7) {
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$host_url = substr($base_url, 0, strpos($base_url, '/', 7));
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$base_url = substr($base_url, 0, strrpos($base_url, '/'));
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}
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// $path is absolute
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if ($path[0] == '/') {
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$abs_path = $host_url.$path;
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}
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else {
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// strip './' because its the same as ''
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$path = preg_replace('/^\.\//', '', $path);
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if (preg_match_all('/\.\.\//', $path, $matches, PREG_SET_ORDER)) {
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$cnt = count($matches);
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while ($cnt--) {
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if ($pos = strrpos($base_url, '/')) {
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$base_url = substr($base_url, 0, $pos);
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}
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$path = substr($path, 3);
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}
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}
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$abs_path = $base_url.'/'.$path;
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}
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return $abs_path;
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}
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}
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