sef.php
7.15 KB
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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
<?php
/**
* @package Joomla.Plugin
* @subpackage System.sef
*
* @copyright Copyright (C) 2005 - 2019 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('_JEXEC') or die;
/**
* Joomla! SEF Plugin.
*
* @since 1.5
*/
class PlgSystemSef extends JPlugin
{
/**
* Application object.
*
* @var JApplicationCms
* @since 3.5
*/
protected $app;
/**
* Add the canonical uri to the head.
*
* @return void
*
* @since 3.5
*/
public function onAfterDispatch()
{
$doc = $this->app->getDocument();
if (!$this->app->isClient('site') || $doc->getType() !== 'html')
{
return;
}
$sefDomain = $this->params->get('domain', false);
// Don't add a canonical html tag if no alternative domain has added in SEF plugin domain field.
if (empty($sefDomain))
{
return;
}
// Check if a canonical html tag already exists (for instance, added by a component).
$canonical = '';
foreach ($doc->_links as $linkUrl => $link)
{
if (isset($link['relation']) && $link['relation'] === 'canonical')
{
$canonical = $linkUrl;
break;
}
}
// If a canonical html tag already exists get the canonical and change it to use the SEF plugin domain field.
if (!empty($canonical))
{
// Remove current canonical link.
unset($doc->_links[$canonical]);
// Set the current canonical link but use the SEF system plugin domain field.
$canonical = $sefDomain . JUri::getInstance($canonical)->toString(array('path', 'query', 'fragment'));
}
// If a canonical html doesn't exists already add a canonical html tag using the SEF plugin domain field.
else
{
$canonical = $sefDomain . JUri::getInstance()->toString(array('path', 'query', 'fragment'));
}
// Add the canonical link.
$doc->addHeadLink(htmlspecialchars($canonical), 'canonical');
}
/**
* Convert the site URL to fit to the HTTP request.
*
* @return void
*/
public function onAfterRender()
{
if (!$this->app->isClient('site'))
{
return;
}
// Replace src links.
$base = JUri::base(true) . '/';
$buffer = $this->app->getBody();
// For feeds we need to search for the URL with domain.
$prefix = $this->app->getDocument()->getType() === 'feed' ? JUri::root() : '';
// Replace index.php URI by SEF URI.
if (strpos($buffer, 'href="' . $prefix . 'index.php?') !== false)
{
preg_match_all('#href="' . $prefix . 'index.php\?([^"]+)"#m', $buffer, $matches);
foreach ($matches[1] as $urlQueryString)
{
$buffer = str_replace(
'href="' . $prefix . 'index.php?' . $urlQueryString . '"',
'href="' . trim($prefix, '/') . JRoute::_('index.php?' . $urlQueryString) . '"',
$buffer
);
}
$this->checkBuffer($buffer);
}
// Check for all unknown protocals (a protocol must contain at least one alpahnumeric character followed by a ":").
$protocols = '[a-zA-Z0-9\-]+:';
$attributes = array('href=', 'src=', 'poster=');
foreach ($attributes as $attribute)
{
if (strpos($buffer, $attribute) !== false)
{
$regex = '#\s' . $attribute . '"(?!/|' . $protocols . '|\#|\')([^"]*)"#m';
$buffer = preg_replace($regex, ' ' . $attribute . '"' . $base . '$1"', $buffer);
$this->checkBuffer($buffer);
}
}
if (strpos($buffer, 'srcset=') !== false)
{
$regex = '#\s+srcset="([^"]+)"#m';
$buffer = preg_replace_callback(
$regex,
function ($match) use ($base, $protocols)
{
preg_match_all('#(?:[^\s]+)\s*(?:[\d\.]+[wx])?(?:\,\s*)?#i', $match[1], $matches);
foreach ($matches[0] as &$src)
{
$src = preg_replace('#^(?!/|' . $protocols . '|\#|\')(.+)#', $base . '$1', $src);
}
return ' srcset="' . implode($matches[0]) . '"';
},
$buffer
);
$this->checkBuffer($buffer);
}
// Replace all unknown protocals in javascript window open events.
if (strpos($buffer, 'window.open(') !== false)
{
$regex = '#onclick="window.open\(\'(?!/|' . $protocols . '|\#)([^/]+[^\']*?\')#m';
$buffer = preg_replace($regex, 'onclick="window.open(\'' . $base . '$1', $buffer);
$this->checkBuffer($buffer);
}
// Replace all unknown protocols in onmouseover and onmouseout attributes.
$attributes = array('onmouseover=', 'onmouseout=');
foreach ($attributes as $attribute)
{
if (strpos($buffer, $attribute) !== false)
{
$regex = '#' . $attribute . '"this.src=([\']+)(?!/|' . $protocols . '|\#|\')([^"]+)"#m';
$buffer = preg_replace($regex, $attribute . '"this.src=$1' . $base . '$2"', $buffer);
$this->checkBuffer($buffer);
}
}
// Replace all unknown protocols in CSS background image.
if (strpos($buffer, 'style=') !== false)
{
$regex_url = '\s*url\s*\(([\'\"]|\&\#0?3[49];)?(?!/|\&\#0?3[49];|' . $protocols . '|\#)([^\)\'\"]+)([\'\"]|\&\#0?3[49];)?\)';
$regex = '#style=\s*([\'\"])(.*):' . $regex_url . '#m';
$buffer = preg_replace($regex, 'style=$1$2: url($3' . $base . '$4$5)', $buffer);
$this->checkBuffer($buffer);
}
// Replace all unknown protocols in OBJECT param tag.
if (strpos($buffer, '<param') !== false)
{
// OBJECT <param name="xx", value="yy"> -- fix it only inside the <param> tag.
$regex = '#(<param\s+)name\s*=\s*"(movie|src|url)"[^>]\s*value\s*=\s*"(?!/|' . $protocols . '|\#|\')([^"]*)"#m';
$buffer = preg_replace($regex, '$1name="$2" value="' . $base . '$3"', $buffer);
$this->checkBuffer($buffer);
// OBJECT <param value="xx", name="yy"> -- fix it only inside the <param> tag.
$regex = '#(<param\s+[^>]*)value\s*=\s*"(?!/|' . $protocols . '|\#|\')([^"]*)"\s*name\s*=\s*"(movie|src|url)"#m';
$buffer = preg_replace($regex, '<param value="' . $base . '$2" name="$3"', $buffer);
$this->checkBuffer($buffer);
}
// Replace all unknown protocols in OBJECT tag.
if (strpos($buffer, '<object') !== false)
{
$regex = '#(<object\s+[^>]*)data\s*=\s*"(?!/|' . $protocols . '|\#|\')([^"]*)"#m';
$buffer = preg_replace($regex, '$1data="' . $base . '$2"', $buffer);
$this->checkBuffer($buffer);
}
// Use the replaced HTML body.
$this->app->setBody($buffer);
}
/**
* Check the buffer.
*
* @param string $buffer Buffer to be checked.
*
* @return void
*/
private function checkBuffer($buffer)
{
if ($buffer === null)
{
switch (preg_last_error())
{
case PREG_BACKTRACK_LIMIT_ERROR:
$message = 'PHP regular expression limit reached (pcre.backtrack_limit)';
break;
case PREG_RECURSION_LIMIT_ERROR:
$message = 'PHP regular expression limit reached (pcre.recursion_limit)';
break;
case PREG_BAD_UTF8_ERROR:
$message = 'Bad UTF8 passed to PCRE function';
break;
default:
$message = 'Unknown PCRE error calling PCRE function';
}
throw new RuntimeException($message);
}
}
/**
* Replace the matched tags.
*
* @param array &$matches An array of matches (see preg_match_all).
*
* @return string
*
* @deprecated 4.0 No replacement.
*/
protected static function route(&$matches)
{
JLog::add(__METHOD__ . ' is deprecated, no replacement.', JLog::WARNING, 'deprecated');
$url = $matches[1];
$url = str_replace('&', '&', $url);
$route = JRoute::_('index.php?' . $url);
return 'href="' . $route;
}
}