1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
<?php
/*
+-----------------------------------------------------------------------+
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2005-2012, 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: |
| 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
* @author Thomas Bruederli <roundcube@gmail.com>
*/
class rcube_base_replacer
{
private $base_url;
public function __construct($base)
{
$this->base_url = $base;
}
public function callback($matches)
{
return $matches[1] . '="' . self::absolute_url($matches[3], $this->base_url) . '"';
}
public function replace($body)
{
return preg_replace_callback(array(
'/(src|background|href)=(["\']?)([^"\'\s>]+)(\2|\s|>)/i',
'/(url\s*\()(["\']?)([^"\'\)\s]+)(\2)\)/i',
),
array($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)
{
$host_url = $base_url;
$abs_path = $path;
// 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 $path;
}
// cut base_url to the last directory
if (strrpos($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[0] == '/') {
$abs_path = $host_url.$path;
}
else {
// strip './' because its the same as ''
$path = preg_replace('/^\.\//', '', $path);
if (preg_match_all('/\.\.\//', $path, $matches, PREG_SET_ORDER)) {
foreach ($matches as $a_match) {
if ($pos = strrpos($base_url, '/')) {
$base_url = substr($base_url, 0, $pos);
}
$path = substr($path, 3);
}
}
$abs_path = $base_url.'/'.$path;
}
return $abs_path;
}
}
|
