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
|
<?php
class HTMLPurifier_DefinitionCache_Serializer extends
HTMLPurifier_DefinitionCache
{
public function add($def, $config) {
if (!$this->checkDefType($def)) return;
$file = $this->generateFilePath($config);
if (file_exists($file)) return false;
if (!$this->_prepareDir($config)) return false;
return $this->_write($file, serialize($def), $config);
}
public function set($def, $config) {
if (!$this->checkDefType($def)) return;
$file = $this->generateFilePath($config);
if (!$this->_prepareDir($config)) return false;
return $this->_write($file, serialize($def), $config);
}
public function replace($def, $config) {
if (!$this->checkDefType($def)) return;
$file = $this->generateFilePath($config);
if (!file_exists($file)) return false;
if (!$this->_prepareDir($config)) return false;
return $this->_write($file, serialize($def), $config);
}
public function get($config) {
$file = $this->generateFilePath($config);
if (!file_exists($file)) return false;
return unserialize(file_get_contents($file));
}
public function remove($config) {
$file = $this->generateFilePath($config);
if (!file_exists($file)) return false;
return unlink($file);
}
public function flush($config) {
if (!$this->_prepareDir($config)) return false;
$dir = $this->generateDirectoryPath($config);
$dh = opendir($dir);
while (false !== ($filename = readdir($dh))) {
if (empty($filename)) continue;
if ($filename[0] === '.') continue;
unlink($dir . '/' . $filename);
}
}
public function cleanup($config) {
if (!$this->_prepareDir($config)) return false;
$dir = $this->generateDirectoryPath($config);
$dh = opendir($dir);
while (false !== ($filename = readdir($dh))) {
if (empty($filename)) continue;
if ($filename[0] === '.') continue;
$key = substr($filename, 0, strlen($filename) - 4);
if ($this->isOld($key, $config)) unlink($dir . '/' . $filename);
}
}
/**
* Generates the file path to the serial file corresponding to
* the configuration and definition name
* @todo Make protected
*/
public function generateFilePath($config) {
$key = $this->generateKey($config);
return $this->generateDirectoryPath($config) . '/' . $key . '.ser';
}
/**
* Generates the path to the directory contain this cache's serial files
* @note No trailing slash
* @todo Make protected
*/
public function generateDirectoryPath($config) {
$base = $this->generateBaseDirectoryPath($config);
return $base . '/' . $this->type;
}
/**
* Generates path to base directory that contains all definition type
* serials
* @todo Make protected
*/
public function generateBaseDirectoryPath($config) {
$base = $config->get('Cache.SerializerPath');
if (is_null($base)) {
/* for a packaged version, HTMLPURIFIER_PREFIX is read-only */
$base = "/nonexistent";
while (is_dir($base))
$base .= "/n";
}
return $base;
}
/**
* Convenience wrapper function for file_put_contents
* @param $file File name to write to
* @param $data Data to write into file
* @param $config Config object
* @return Number of bytes written if success, or false if failure.
*/
private function _write($file, $data, $config) {
$result = file_put_contents($file, $data);
if ($result !== false) {
// set permissions of the new file (no execute)
$chmod = $config->get('Cache.SerializerPermissions');
if (!$chmod) {
$chmod = 0644; // invalid config or simpletest
}
$chmod = $chmod & 0666;
chmod($file, $chmod);
}
return $result;
}
/**
* Prepares the directory that this type stores the serials in
* @param $config Config object
* @return True if successful
*/
private function _prepareDir($config) {
$directory = $this->generateDirectoryPath($config);
$chmod = $config->get('Cache.SerializerPermissions');
if (!$chmod) {
$chmod = 0755; // invalid config or simpletest
}
if (!is_dir($directory)) {
$base = $this->generateBaseDirectoryPath($config);
if (!is_dir($base)) {
trigger_error('Base directory '.$base.' does not exist,
please create or change using %Cache.SerializerPath',
E_USER_WARNING);
return false;
} elseif (!$this->_testPermissions($base, $chmod)) {
return false;
}
$old = umask(0000);
mkdir($directory, $chmod);
umask($old);
} elseif (!$this->_testPermissions($directory, $chmod)) {
return false;
}
return true;
}
/**
* Tests permissions on a directory and throws out friendly
* error messages and attempts to chmod it itself if possible
* @param $dir Directory path
* @param $chmod Permissions
* @return True if directory writable
*/
private function _testPermissions($dir, $chmod) {
// early abort, if it is writable, everything is hunky-dory
if (is_writable($dir)) return true;
if (!is_dir($dir)) {
// generally, you'll want to handle this beforehand
// so a more specific error message can be given
trigger_error('Directory '.$dir.' does not exist',
E_USER_WARNING);
return false;
}
if (function_exists('posix_getuid')) {
// POSIX system, we can give more specific advice
if (fileowner($dir) === posix_getuid()) {
// we can chmod it ourselves
$chmod = $chmod | 0700;
if (chmod($dir, $chmod)) return true;
} elseif (filegroup($dir) === posix_getgid()) {
$chmod = $chmod | 0070;
} else {
// PHP's probably running as nobody, so we'll
// need to give global permissions
$chmod = $chmod | 0777;
}
trigger_error('Directory '.$dir.' not writable, '.
'please chmod to ' . decoct($chmod),
E_USER_WARNING);
} else {
// generic error message
trigger_error('Directory '.$dir.' not writable, '.
'please alter file permissions',
E_USER_WARNING);
}
return false;
}
}
// vim: et sw=4 sts=4
|
