1 <?php
2 /**
3 * Smarty Internal Plugin CacheResource File
4 *
5 * @package Smarty
6 * @subpackage Cacher
7 * @author Uwe Tews
8 * @author Rodney Rehm
9 */
11 /**
12 * This class does contain all necessary methods for the HTML cache on file system
13 *
14 * Implements the file system as resource for the HTML cache Version ussing nocache inserts.
15 *
16 * @package Smarty
17 * @subpackage Cacher
18 */
19 class Smarty_Internal_CacheResource_File extends Smarty_CacheResource {
21 /**
22 * populate Cached Object with meta data from Resource
23 *
24 * @param Smarty_Template_Cached $cached cached object
25 * @param Smarty_Internal_Template $_template template object
26 * @return void
27 */
28 public function populate(Smarty_Template_Cached $cached, Smarty_Internal_Template $_template)
29 {
30 $_source_file_path = str_replace(':', '.', $_template->source->filepath);
31 $_cache_id = isset($_template->cache_id) ? preg_replace('![^\w\|]+!', '_', $_template->cache_id) : null;
32 $_compile_id = isset($_template->compile_id) ? preg_replace('![^\w\|]+!', '_', $_template->compile_id) : null;
33 $_filepath = $_template->source->uid;
34 // if use_sub_dirs, break file into directories
35 if ($_template->smarty->use_sub_dirs) {
36 $_filepath = substr($_filepath, 0, 2) . DS
37 . substr($_filepath, 2, 2) . DS
38 . substr($_filepath, 4, 2) . DS
39 . $_filepath;
40 }
41 $_compile_dir_sep = $_template->smarty->use_sub_dirs ? DS : '^';
42 if (isset($_cache_id)) {
43 $_cache_id = str_replace('|', $_compile_dir_sep, $_cache_id) . $_compile_dir_sep;
44 } else {
45 $_cache_id = '';
46 }
47 if (isset($_compile_id)) {
48 $_compile_id = $_compile_id . $_compile_dir_sep;
49 } else {
50 $_compile_id = '';
51 }
52 $_cache_dir = $_template->smarty->getCacheDir();
53 if ($_template->smarty->cache_locking) {
54 // create locking file name
55 // relative file name?
56 if (!preg_match('/^([\/\\\\]|[a-zA-Z]:[\/\\\\])/', $_cache_dir)) {
57 $_lock_dir = rtrim(getcwd(), '/\\') . DS . $_cache_dir;
58 } else {
59 $_lock_dir = $_cache_dir;
60 }
61 $cached->lock_id = $_lock_dir.sha1($_cache_id.$_compile_id.$_template->source->uid).'.lock';
62 }
63 $cached->filepath = $_cache_dir . $_cache_id . $_compile_id . $_filepath . '.' . basename($_source_file_path) . '.php';
64 $cached->timestamp = @filemtime($cached->filepath);
65 $cached->exists = !!$cached->timestamp;
66 }
68 /**
69 * populate Cached Object with timestamp and exists from Resource
70 *
71 * @param Smarty_Template_Cached $cached cached object
72 * @return void
73 */
74 public function populateTimestamp(Smarty_Template_Cached $cached)
75 {
76 $cached->timestamp = @filemtime($cached->filepath);
77 $cached->exists = !!$cached->timestamp;
78 }
80 /**
81 * Read the cached template and process its header
82 *
83 * @param Smarty_Internal_Template $_template template object
84 * @param Smarty_Template_Cached $cached cached object
85 * @return booelan true or false if the cached content does not exist
86 */
87 public function process(Smarty_Internal_Template $_template, Smarty_Template_Cached $cached=null)
88 {
89 $_smarty_tpl = $_template;
90 return @include $_template->cached->filepath;
91 }
93 /**
94 * Write the rendered template output to cache
95 *
96 * @param Smarty_Internal_Template $_template template object
97 * @param string $content content to cache
98 * @return boolean success
99 */
100 public function writeCachedContent(Smarty_Internal_Template $_template, $content)
101 {
102 if (Smarty_Internal_Write_File::writeFile($_template->cached->filepath, $content, $_template->smarty) === true) {
103 $_template->cached->timestamp = filemtime($_template->cached->filepath);
104 $_template->cached->exists = !!$_template->cached->timestamp;
105 return true;
106 }
107 return false;
108 }
110 /**
111 * Empty cache
112 *
113 * @param Smarty_Internal_Template $_template template object
114 * @param integer $exp_time expiration time (number of seconds, not timestamp)
115 * @return integer number of cache files deleted
116 */
117 public function clearAll(Smarty $smarty, $exp_time = null)
118 {
119 return $this->clear($smarty, null, null, null, $exp_time);
120 }
122 /**
123 * Empty cache for a specific template
124 *
125 * @param Smarty $_template template object
126 * @param string $resource_name template name
127 * @param string $cache_id cache id
128 * @param string $compile_id compile id
129 * @param integer $exp_time expiration time (number of seconds, not timestamp)
130 * @return integer number of cache files deleted
131 */
132 public function clear(Smarty $smarty, $resource_name, $cache_id, $compile_id, $exp_time)
133 {
134 $_cache_id = isset($cache_id) ? preg_replace('![^\w\|]+!', '_', $cache_id) : null;
135 $_compile_id = isset($compile_id) ? preg_replace('![^\w\|]+!', '_', $compile_id) : null;
136 $_dir_sep = $smarty->use_sub_dirs ? '/' : '^';
137 $_compile_id_offset = $smarty->use_sub_dirs ? 3 : 0;
138 $_dir = $smarty->getCacheDir();
139 $_dir_length = strlen($_dir);
140 if (isset($_cache_id)) {
141 $_cache_id_parts = explode('|', $_cache_id);
142 $_cache_id_parts_count = count($_cache_id_parts);
143 if ($smarty->use_sub_dirs) {
144 foreach ($_cache_id_parts as $id_part) {
145 $_dir .= $id_part . DS;
146 }
147 }
148 }
149 if (isset($resource_name)) {
150 $_save_stat = $smarty->caching;
151 $smarty->caching = true;
152 $tpl = new $smarty->template_class($resource_name, $smarty);
153 $smarty->caching = $_save_stat;
155 // remove from template cache
156 $tpl->source; // have the template registered before unset()
157 $_templateId = sha1($tpl->source->unique_resource . $tpl->cache_id . $tpl->compile_id);
158 unset($smarty->template_objects[$_templateId]);
160 if ($tpl->source->exists) {
161 $_resourcename_parts = basename(str_replace('^', '/', $tpl->cached->filepath));
162 } else {
163 return 0;
164 }
165 }
166 $_count = 0;
167 $_time = time();
168 if (file_exists($_dir)) {
169 $_cacheDirs = new RecursiveDirectoryIterator($_dir);
170 $_cache = new RecursiveIteratorIterator($_cacheDirs, RecursiveIteratorIterator::CHILD_FIRST);
171 foreach ($_cache as $_file) {
172 if (substr($_file->getBasename(),0,1) == '.' || strpos($_file, '.svn') !== false) continue;
173 // directory ?
174 if ($_file->isDir()) {
175 if (!$_cache->isDot()) {
176 // delete folder if empty
177 @rmdir($_file->getPathname());
178 }
179 } else {
180 $_parts = explode($_dir_sep, str_replace('\\', '/', substr((string)$_file, $_dir_length)));
181 $_parts_count = count($_parts);
182 // check name
183 if (isset($resource_name)) {
184 if ($_parts[$_parts_count-1] != $_resourcename_parts) {
185 continue;
186 }
187 }
188 // check compile id
189 if (isset($_compile_id) && (!isset($_parts[$_parts_count-2 - $_compile_id_offset]) || $_parts[$_parts_count-2 - $_compile_id_offset] != $_compile_id)) {
190 continue;
191 }
192 // check cache id
193 if (isset($_cache_id)) {
194 // count of cache id parts
195 $_parts_count = (isset($_compile_id)) ? $_parts_count - 2 - $_compile_id_offset : $_parts_count - 1 - $_compile_id_offset;
196 if ($_parts_count < $_cache_id_parts_count) {
197 continue;
198 }
199 for ($i = 0; $i < $_cache_id_parts_count; $i++) {
200 if ($_parts[$i] != $_cache_id_parts[$i]) continue 2;
201 }
202 }
203 // expired ?
204 if (isset($exp_time) && $_time - @filemtime($_file) < $exp_time) {
205 continue;
206 }
207 $_count += @unlink((string) $_file) ? 1 : 0;
208 }
209 }
210 }
211 return $_count;
212 }
214 /**
215 * Check is cache is locked for this template
216 *
217 * @param Smarty $smarty Smarty object
218 * @param Smarty_Template_Cached $cached cached object
219 * @return booelan true or false if cache is locked
220 */
221 public function hasLock(Smarty $smarty, Smarty_Template_Cached $cached)
222 {
223 if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
224 clearstatcache(true, $cached->lock_id);
225 } else {
226 clearstatcache();
227 }
228 $t = @filemtime($cached->lock_id);
229 return $t && (time() - $t < $smarty->locking_timeout);
230 }
232 /**
233 * Lock cache for this template
234 *
235 * @param Smarty $smarty Smarty object
236 * @param Smarty_Template_Cached $cached cached object
237 */
238 public function acquireLock(Smarty $smarty, Smarty_Template_Cached $cached)
239 {
240 $cached->is_locked = true;
241 touch($cached->lock_id);
242 }
244 /**
245 * Unlock cache for this template
246 *
247 * @param Smarty $smarty Smarty object
248 * @param Smarty_Template_Cached $cached cached object
249 */
250 public function releaseLock(Smarty $smarty, Smarty_Template_Cached $cached)
251 {
252 $cached->is_locked = false;
253 @unlink($cached->lock_id);
254 }
255 }
257 ?>