wp-cache-phase1.php — WP Super Cache 1.0.1

wp-super-cache / wp-cache-phase1.php

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wp-cache-phase1.php

585 lines

1	<?php
2	//error_reporting(E_ERROR \| E_PARSE); // uncomment to debug this file!
3	// Pre-2.6 compatibility
4	if( !defined('WP_CONTENT_DIR') )
5	define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' );
6
7	if( !include( WP_CONTENT_DIR . '/wp-cache-config.php' ) )
8	return false;
9
10	if( !defined( 'WPCACHEHOME' ) )
11	define('WPCACHEHOME', dirname(__FILE__).'/');
12
13	include( WPCACHEHOME . 'wp-cache-base.php');
14
15	if( $blogcacheid != '' ) {
16	$blog_cache_dir = str_replace( '//', '/', $cache_path . "blogs/" . $blogcacheid . '/' );
17	} else {
18	$blog_cache_dir = $cache_path;
19	}
20
21	$mutex_filename = 'wp_cache_mutex.lock';
22	$new_cache = false;
23
24	if( !isset( $wp_cache_plugins_dir ) )
25	$wp_cache_plugins_dir = WPCACHEHOME . 'plugins';
26
27	require_once( WPCACHEHOME . 'wp-cache-phase2.php');
28
29	if ( isset( $_GET[ 'donotcachepage' ] ) && isset( $cache_page_secret ) && $_GET[ 'donotcachepage' ] == $cache_page_secret ) {
30	$cache_enabled = false;
31	define( 'DONOTCACHEPAGE', 1 );
32	}
33	if ( isset( $wp_cache_make_known_anon ) && $wp_cache_make_known_anon )
34	wp_supercache_cache_for_admins();
35
36	$plugins = glob( $wp_cache_plugins_dir . '/*.php' );
37	if( is_array( $plugins ) ) {
38	foreach ( $plugins as $plugin ) {
39	if( is_file( $plugin ) )
40	require_once( $plugin );
41	}
42	}
43
44	do_cacheaction( 'cache_init' );
45
46	if (!$cache_enabled \|\| $_SERVER["REQUEST_METHOD"] == 'POST')
47	return true;
48
49	$file_expired = false;
50	$cache_filename = '';
51	$meta_file = '';
52	$wp_cache_gzip_encoding = '';
53
54	$gzipped = 0;
55	$gzsize = 0;
56
57	function gzip_accepted(){
58	if ( 1 == ini_get( 'zlib.output_compression' ) \|\| "on" == strtolower( ini_get( 'zlib.output_compression' ) ) ) // don't compress WP-Cache data files when PHP is already doing it
59	return false;
60
61	if (strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') === false) return false;
62	return 'gzip';
63	}
64
65	if ($cache_compression) {
66	$wp_cache_gzip_encoding = gzip_accepted();
67	}
68
69	add_cacheaction( 'supercache_filename_str', 'wp_cache_check_mobile' );
70
71	$wp_cache_request_uri = $_SERVER[ 'REQUEST_URI' ]; // Cache this in case any plugin modifies it.
72
73	if ( $wp_cache_object_cache ) {
74	if ( ! include_once( WP_CONTENT_DIR . '/object-cache.php' ) )
75	return;
76
77	wp_cache_init(); // Note: wp-settings.php calls wp_cache_init() which clobbers the object made here.
78
79	if ( ! is_object( $wp_object_cache ) )
80	return;
81	}
82
83	if( false == @is_dir( $blog_cache_dir ) ) {
84	@mkdir( $cache_path . "blogs" );
85	@mkdir( $blog_cache_dir );
86	}
87
88	if( false == @is_dir( $blog_cache_dir . 'meta' ) )
89	@mkdir( $blog_cache_dir . 'meta' );
90
91
92	$wp_start_time = microtime();
93
94	function get_wp_cache_key( $url = false ) {
95	global $wp_cache_request_uri, $wp_cache_gzip_encoding;
96	if ( !$url )
97	$url = $wp_cache_request_uri;
98	return do_cacheaction( 'wp_cache_key', $_SERVER['HTTP_HOST'] . intval( $_SERVER[ 'SERVER_PORT' ] ) . preg_replace('/#.*$/', '', str_replace( '/index.php', '/', $url ) ) . $wp_cache_gzip_encoding . wp_cache_get_cookies_values() );
99	}
100
101	function wp_super_cache_init() {
102	global $wp_cache_key, $key, $blogcacheid, $wp_cache_request_uri, $file_prefix, $blog_cache_dir, $meta_file, $cache_file, $cache_filename, $wp_super_cache_debug, $meta_pathname, $wp_cache_gzip_encoding, $meta;
103
104	$wp_cache_key = get_wp_cache_key();
105	$key = $blogcacheid . md5( $wp_cache_key );
106	$wp_cache_key = $blogcacheid . $wp_cache_key;
107
108	$cache_filename = $file_prefix . $key . '.html';
109	$meta_file = $file_prefix . $key . '.meta';
110	$cache_file = realpath( $blog_cache_dir . $cache_filename );
111	$meta_pathname = realpath( $blog_cache_dir . 'meta/' . $meta_file );
112	return compact( 'key', 'cache_filename', 'meta_file', 'cache_file', 'meta_pathname' );
113	}
114
115	function wp_cache_serve_cache_file() {
116	global $key, $blogcacheid, $wp_cache_request_uri, $file_prefix, $blog_cache_dir, $meta_file, $cache_file, $cache_filename, $wp_super_cache_debug, $meta_pathname, $wp_cache_gzip_encoding, $meta;
117	global $wp_cache_object_cache, $cache_compression, $wp_cache_slash_check, $wp_supercache_304, $wp_cache_home_path;
118
119	extract( wp_super_cache_init() );
120
121	if ( wp_cache_user_agent_is_rejected() ) {
122	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "No wp-cache file served as user agent rejected.", 5 );
123	return false;
124	}
125
126	if ( $wp_cache_object_cache && wp_cache_get_cookies_values() == '' ) {
127	if ( !empty( $_GET ) ) {
128	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Non empty GET request. Not serving request from object cache", 1 );
129	return false;
130	}
131
132	$oc_key = get_oc_key();
133	$meta_filename = $oc_key . ".meta";
134	if ( gzip_accepted() ) {
135	$oc_key .= ".gz";
136	$meta_filename .= ".gz";
137	}
138	$cache = wp_cache_get( $oc_key, 'supercache' );
139	$meta = unserialize( wp_cache_get( $meta_filename, 'supercache' ) );
140	if ( is_array( $meta ) == false ) {
141	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Meta array from object cache corrupt. Ignoring cache.", 1 );
142	return true;
143	}
144	} elseif ( file_exists( $cache_file ) ) {
145	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "wp-cache file exists: $cache_file", 5 );
146	if ( !( $meta = unserialize( @file_get_contents( $meta_pathname) ) ) ) {
147	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "couldn't load wp-cache meta file", 5 );
148	return true;
149	}
150	if ( is_array( $meta ) == false ) {
151	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "meta array corrupt, deleting $meta_pathname and $cache_file", 1 );
152	@unlink( $meta_pathname );
153	@unlink( $cache_file );
154	return true;
155	}
156	} else {
157	// last chance, check if a supercache file exists. Just in case .htaccess rules don't work on this host
158	$filename = supercache_filename();
159	$file = get_current_url_supercache_dir() . $filename;
160	$phpfile = get_current_url_supercache_dir() . $filename . ".php";
161	$serving_supercache = false;
162	if ( file_exists( $file ) ) {
163	$serving_supercache = 'html';
164	} elseif ( file_exists( $phpfile ) ) {
165	$serving_supercache = 'php';
166	}
167	if ( false == isset( $wp_cache_home_path ) )
168	$wp_cache_home_path = '/';
169	if (
170	(
171	$wp_cache_request_uri == $wp_cache_home_path \|\|
172	( $wp_cache_slash_check && substr( $wp_cache_request_uri, -1 ) == '/' ) \|\|
173	( $wp_cache_slash_check == 0 && substr( $wp_cache_request_uri, -1 ) != '/' )
174	) &&
175	( wp_cache_get_cookies_values() == '' && empty( $_GET ) && $serving_supercache ) )
176	{
177	header( "Content-type: text/html; charset=UTF-8" ); // UTF-8 hard coded is bad but we don't know what it is this early in the process
178	header( "Vary: Accept-Encoding, Cookie" );
179	header( "Cache-Control: max-age=3, must-revalidate" );
180	header( "WP-Super-Cache: Served supercache file from PHP" );
181	if ( file_exists( $file . '.gz' ) && $wp_cache_gzip_encoding ) {
182	$file = $file . '.gz';
183	header( 'Content-Encoding: ' . $wp_cache_gzip_encoding );
184	header( 'Content-Length: ' . filesize( $file ) );
185	} elseif ( $serving_supercache == 'html' && $wp_supercache_304 ) {
186	header( 'Content-Length: ' . filesize( $file ) );
187	}
188
189	if ( $serving_supercache == 'html' && $wp_supercache_304 ) {
190	if ( function_exists( 'apache_request_headers' ) ) {
191	$request = apache_request_headers();
192	$remote_mod_time = $request[ 'If-Modified-Since' ];
193	} else {
194	$remote_mod_time = $_SERVER[ 'HTTP_IF_MODIFIED_SINCE' ];
195	}
196	$local_mod_time = gmdate("D, d M Y H:i:s",filemtime( $file )).' GMT';
197	if ( $remote_mod_time == $local_mod_time ) {
198	header("HTTP/1.0 304 Not Modified");
199	exit();
200	}
201	header( 'Last-Modified: ' . $local_mod_time );
202	}
203	if ( $serving_supercache == 'html' ) {
204	readfile( $file );
205	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Served page from supercache file using PHP.", 5 );
206	exit();
207	} elseif ( $serving_supercache == 'php' ) {
208	$cachefiledata = file_get_contents($phpfile);
209	if ( $cache_compression and $wp_cache_gzip_encoding ) {
210	ob_start("ob_gzhandler");
211	eval( '?>' . $cachefiledata . '<?php ' );
212	echo "\n<!-- Compression = gzip -->\n";
213	ob_end_flush();
214	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Served compressed dynamic page from supercache file using PHP. File: $file", 5 );
215	} else {
216	eval( '?>' . $cachefiledata . '<?php ' );
217	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Served dynamic page from supercache file using PHP. File: $file", 5 );
218	}
219	exit();
220	}
221	} else {
222	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "No wp-cache file exists. Must generate a new one.", 5 );
223	return false;
224	}
225	}
226	$cache_file = do_cacheaction( 'wp_cache_served_cache_file', $cache_file );
227	// Sometimes the gzip headers are lost. Make sure html returned isn't compressed!
228	if ( $cache_compression && $wp_cache_gzip_encoding && !in_array( 'Content-Encoding: ' . $wp_cache_gzip_encoding, $meta[ 'headers' ] ) ) {
229	$ungzip = true;
230	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "GZIP headers not found. Force uncompressed output.", 1 );
231	} else {
232	$ungzip = false;
233	}
234	foreach ($meta[ 'headers' ] as $t => $header) {
235	// godaddy fix, via http://blog.gneu.org/2008/05/wp-supercache-on-godaddy/ and http://www.littleredrails.com/blog/2007/09/08/using-wp-cache-on-godaddy-500-error/
236	if( strpos( $header, 'Last-Modified:' ) === false )
237	header($header);
238	}
239	header( 'WP-Super-Cache: Served legacy cache file' );
240	if ( $wp_cache_object_cache ) {
241	if ( $cache ) {
242	if ( $ungzip ) {
243	$uncompressed = gzuncompress( $cache );
244	if ( $uncompressed ) {
245	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Uncompressed gzipped cache file from object cache", 1 );
246	$cache = $uncompressed;
247	unset( $uncompressed );
248	}
249	}
250	if ( isset( $meta[ 'dynamic' ] ) && $meta[ 'dynamic' ] ) {
251	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Serving wp-cache dynamic file from object cache", 5 );
252	eval( '?>' . $cache . '<?php ' );
253	} else {
254	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Serving wp-cache static file from object cache", 5 );
255	echo $cache;
256	}
257	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "exit request", 5 );
258	die();
259	}
260	} else {
261	if ( $meta[ 'dynamic' ] ) {
262	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Serving wp-cache dynamic file", 5 );
263	if ( $ungzip ) {
264	$cache = file_get_contents( $cache_file );
265	$uncompressed = @gzuncompress( $cache );
266	if ( $uncompressed ) {
267	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Uncompressed gzipped cache file from wp-cache", 1 );
268	unset( $cache );
269	eval( '?>' . $uncompressed . '<?php ' );
270	} else {
271	eval( '?>' . $cache . '<?php ' );
272	}
273	} else {
274	include( $cache_file );
275	}
276	} else {
277	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Serving wp-cache static file", 5 );
278	if ( $ungzip ) {
279	$cache = file_get_contents( $cache_file );
280	$uncompressed = gzuncompress( $cache );
281	if ( $uncompressed ) {
282	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Uncompressed gzipped cache file from wp-cache", 1 );
283	echo $uncompressed;
284	} else {
285	echo $cache;
286	}
287	} else {
288	readfile( $cache_file );
289	}
290	}
291	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "exit request", 5 );
292	die();
293	}
294	}
295
296	if(defined('DOING_CRON')) {
297	extract( wp_super_cache_init() );
298	return true;
299	}
300
301	if ( !isset( $wp_super_cache_late_init ) \|\| ( isset( $wp_super_cache_late_init ) && false == $wp_super_cache_late_init ) ) {
302	wp_cache_serve_cache_file();
303	}
304
305	function wp_cache_postload() {
306	global $cache_enabled, $wp_super_cache_late_init, $wp_super_cache_debug;
307
308	if ( !$cache_enabled \|\| isset( $_GET[ 'preview' ] ) )
309	return true;
310
311	if ( isset( $wp_super_cache_late_init ) && true == $wp_super_cache_late_init ) {
312	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Supercache Late Init: add wp_cache_serve_cache_file to init", 3 );
313	add_action( 'init', 'wp_cache_late_loader', 9999 );
314	} else {
315	wp_super_cache_init();
316	wp_cache_phase2();
317	}
318	}
319
320	function wp_cache_late_loader() {
321	global $wp_super_cache_debug;
322	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug ) wp_cache_debug( "Supercache Late Loader running on init", 3 );
323	wp_cache_serve_cache_file();
324	wp_cache_phase2();
325	}
326
327	function wp_cache_get_cookies_values() {
328	$string = '';
329	while ($key = key($_COOKIE)) {
330	if ( preg_match( "/^wp-postpass\|^wordpress_logged_in\|^comment_author_/", $key ) ) {
331	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "Cookie detected: $key", 5 );
332	$string .= $_COOKIE[ $key ] . ",";
333	}
334	next($_COOKIE);
335	}
336	reset($_COOKIE);
337
338	// If you use this hook, make sure you update your .htaccess rules with the same conditions
339	$string = do_cacheaction( 'wp_cache_get_cookies_values', $string );
340	return $string;
341	}
342
343	function add_cacheaction( $action, $func ) {
344	global $wp_supercache_actions;
345	$wp_supercache_actions[ $action ][] = $func;
346	}
347
348	function do_cacheaction( $action, $value = '' ) {
349	global $wp_supercache_actions;
350
351	if ( !isset( $wp_supercache_actions ) \|\| !is_array( $wp_supercache_actions ) )
352	return $value;
353
354	if( array_key_exists($action, $wp_supercache_actions) && is_array( $wp_supercache_actions[ $action ] ) ) {
355	$actions = $wp_supercache_actions[ $action ];
356	foreach( $actions as $func ) {
357	if ( is_array( $func ) ) {
358	$value = $func[0]->{$func[1]}( $value );
359	} else {
360	$value = $func( $value );
361	}
362	}
363	}
364
365	return $value;
366	}
367
368	function wp_cache_mobile_group( $user_agent ) {
369	global $wp_cache_mobile_groups;
370	foreach( (array)$wp_cache_mobile_groups as $name => $group ) {
371	foreach( (array)$group as $browser ) {
372	$browser = trim( strtolower( $browser ) );
373	if ( $browser != '' && strstr( $user_agent, $browser ) ) {
374	return $browser;
375	}
376	}
377	}
378	return "mobile";
379	}
380
381	// From http://wordpress.org/extend/plugins/wordpress-mobile-edition/ by Alex King
382	function wp_cache_check_mobile( $cache_key ) {
383	global $wp_cache_mobile_enabled, $wp_cache_mobile_browsers, $wp_cache_mobile_prefixes;
384	if ( !isset( $wp_cache_mobile_enabled ) \|\| false == $wp_cache_mobile_enabled )
385	return $cache_key;
386
387	if ( !isset( $_SERVER[ "HTTP_USER_AGENT" ] ) ) {
388	return $cache_key;
389	}
390
391	$browsers = explode( ',', $wp_cache_mobile_browsers );
392	$user_agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );
393	foreach ($browsers as $browser) {
394	if ( strstr( $user_agent, trim( strtolower( $browser ) ) ) ) {
395	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "mobile browser detected: " . $_SERVER[ "HTTP_USER_AGENT" ], 5 );
396	return $cache_key . '-' . wp_cache_mobile_group( $user_agent );
397	}
398	}
399	if (isset($_SERVER['HTTP_X_WAP_PROFILE']) )
400	return $cache_key . '-' . $_SERVER['HTTP_X_WAP_PROFILE'];
401	if (isset($_SERVER['HTTP_PROFILE']) )
402	return $cache_key . '-' . $_SERVER['HTTP_PROFILE'];
403
404	if ( isset( $wp_cache_mobile_prefixes ) ) {
405	$browsers = explode( ',', $wp_cache_mobile_prefixes );
406	foreach ($browsers as $browser_prefix) {
407	if ( substr($user_agent, 0, 4) == $browser_prefix ) {
408	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "mobile browser (prefix) detected: " . $_SERVER[ "HTTP_USER_AGENT" ], 5 );
409	return $cache_key . '-' . $browser_prefix;
410	}
411	}
412	}
413	$accept = strtolower($_SERVER['HTTP_ACCEPT']);
414	if (strpos($accept, 'wap') !== false) {
415	return $cache_key . '-' . 'wap';
416	}
417
418	if (isset($_SERVER['ALL_HTTP']) && strpos(strtolower($_SERVER['ALL_HTTP']), 'operamini') !== false) {
419	return $cache_key . '-' . 'operamini';
420	}
421	return $cache_key;
422	}
423
424	function wp_cache_debug( $message, $level = 1 ) {
425	global $wp_cache_debug_level, $wp_cache_debug_log, $cache_path, $wp_cache_debug_ip, $wp_super_cache_debug;
426
427	if ( isset( $wp_super_cache_debug ) && $wp_super_cache_debug == false )
428	return false;
429
430	if ( isset( $wp_cache_debug_log ) == false )
431	return false;
432
433	if ( isset( $wp_cache_debug_level ) == false )
434	$wp_cache_debug_level = 1;
435	if ( $wp_cache_debug_level < $level )
436	return false;
437
438	if ( isset( $wp_cache_debug_ip ) && $wp_cache_debug_ip != '' && $wp_cache_debug_ip != $_SERVER[ 'REMOTE_ADDR' ] )
439	return false;
440
441	if ( isset( $wp_cache_debug_log ) && $wp_cache_debug_log != '' ) {
442	error_log( date( 'H:i:s' ) . " " . $_SERVER[ 'REQUEST_URI' ] . " " . $message . "\n", 3, $cache_path . str_replace( '/', '', str_replace( '..', '', $wp_cache_debug_log ) ) );
443	}
444	}
445
446	function wp_cache_user_agent_is_rejected() {
447	global $cache_rejected_user_agent;
448
449	if (!function_exists('apache_request_headers')) return false;
450	$headers = apache_request_headers();
451	if (!isset($headers["User-Agent"])) return false;
452	foreach ($cache_rejected_user_agent as $expr) {
453	if (strlen($expr) > 0 && stristr($headers["User-Agent"], $expr))
454	return true;
455	}
456	return false;
457	}
458
459	function get_supercache_dir() {
460	global $cache_path;
461	return $cache_path . 'supercache/' . trailingslashit( strtolower( preg_replace( '/:.*$/', '', str_replace( 'http://', '', get_option( 'home' ) ) ) ) );
462	}
463	function get_current_url_supercache_dir( $post_id = 0 ) {
464	global $cached_direct_pages, $cache_path, $wp_cache_request_uri;
465	static $saved_supercache_dir = array();
466
467	if ( isset( $saved_supercache_dir[ $post_id ] ) ) {
468	return $saved_supercache_dir[ $post_id ];
469	}
470
471	if ( $post_id != 0 ) {
472	$uri = str_replace( site_url(), '', get_permalink( $post_id ) );
473	} else {
474	$uri = strtolower( $wp_cache_request_uri );
475	}
476	$uri = preg_replace('/[ <>\'\"\r\n\t]/', '', str_replace( '/index.php', '/', str_replace( '..', '', preg_replace("/(\?.*)?$/", '', $uri ) ) ) );
477	$uri = str_replace( '\\', '', $uri );
478	$dir = preg_replace( '/:.*$/', '', $_SERVER["HTTP_HOST"] ) . $uri; // To avoid XSS attacks
479	if ( function_exists( "apply_filters" ) ) {
480	$dir = apply_filters( 'supercache_dir', $dir );
481	} else {
482	$dir = do_cacheaction( 'supercache_dir', $dir );
483	}
484	$dir = $cache_path . 'supercache/' . $dir . '/';
485	if( is_array( $cached_direct_pages ) && in_array( $_SERVER[ 'REQUEST_URI' ], $cached_direct_pages ) ) {
486	$dir = ABSPATH . $uri . '/';
487	}
488	$dir = str_replace( '//', '/', $dir );
489	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( "supercache dir: $dir", 5 );
490	$saved_supercache_dir[ $post_id ] = $dir;
491	return $dir;
492	}
493
494	function get_all_supercache_filenames( $dir = '' ) {
495	global $wp_cache_mobile_enabled;
496
497	$filenames = array( 'index.html', 'index-https.html', 'index.html.php' );
498
499	if ( $dir != '' && isset( $wp_cache_mobile_enabled ) && $wp_cache_mobile_enabled ) {
500	// open directory and look for index-*.html files
501	if ( is_dir( $dir ) && $dh = opendir( $dir ) ) {
502	while ( ( $file = readdir( $dh ) ) !== false ) {
503	if ( substr( $file, 0, 6 ) == 'index-' && strpos( $file, '.html' ) )
504	$filenames[] = $file;
505	}
506	closedir( $dh );
507	}
508	}
509
510	if ( function_exists( "apply_filters" ) ) {
511	$filenames = apply_filters( 'all_supercache_filenames', $filenames );
512	} else {
513	$filenames = do_cacheaction( 'all_supercache_filenames', $filenames );
514	}
515
516	foreach( $filenames as $file ) {
517	$out[] = $file;
518	$out[] = $file . '.gz';
519	}
520
521	return $out;
522	}
523
524	function supercache_filename() {
525	//Add support for https and http caching
526	$is_https = ('on' == strtolower($_SERVER['HTTPS']) \|\| 'https' == strtolower($_SERVER['HTTP_X_FORWARDED_PROTO'])); //Also supports https requests coming from an nginx reverse proxy
527	$extra_str = $is_https ? '-https' : '';
528
529	if ( function_exists( "apply_filters" ) ) {
530	$extra_str = apply_filters( 'supercache_filename_str', $extra_str );
531	} else {
532	$extra_str = do_cacheaction( 'supercache_filename_str', $extra_str );
533	}
534	$filename = 'index' . $extra_str . '.html';
535
536	return $filename;
537	}
538
539	function get_oc_version() {
540	$wp_cache_oc_key = wp_cache_get( "wp_cache_oc_key" );
541	if ( ! $wp_cache_oc_key ) {
542	$wp_cache_oc_key[ 'key' ] = reset_oc_version();
543	} elseif ( $wp_cache_oc_key[ 'ts' ] < time() - 600 )
544	wp_cache_set( "wp_cache_oc_key", array( 'ts' => time(), 'key' => $wp_cache_oc_key[ 'key' ] ) );
545	return $wp_cache_oc_key[ 'key' ];
546	}
547
548	function reset_oc_version( $version = 1 ) {
549	if ( $version == 1 )
550	$version = mt_rand();
551	wp_cache_set( "wp_cache_oc_key", array( 'ts' => time(), 'key' => $version ) );
552
553	return $version;
554	}
555
556	function get_oc_key( $url = false ) {
557	global $wp_cache_gzip_encoding;
558
559	if ( $url ) {
560	$key = intval( $_SERVER[ 'SERVER_PORT' ] ) . strtolower( preg_replace( '/:.*$/', '', $_SERVER[ "HTTP_HOST" ] ) ) . $url;
561	} else {
562	$key = get_current_url_supercache_dir();
563	}
564	return $key . $wp_cache_gzip_encoding . get_oc_version();
565	}
566
567	function wp_supercache_cache_for_admins() {
568	if ( isset( $_GET[ 'preview' ] ) \|\| function_exists( "is_admin" ) && is_admin() )
569	return $cookies;
570
571	$cookie_keys = array( 'wordpress_logged_in', 'comment_author_' );
572	reset( $_COOKIE );
573	foreach( $_COOKIE as $cookie => $val ) {
574	reset( $cookie_keys );
575	foreach( $cookie_keys as $key ) {
576	if ( strpos( $cookie, $key ) !== FALSE ) {
577	if ( isset( $GLOBALS[ 'wp_super_cache_debug' ] ) && $GLOBALS[ 'wp_super_cache_debug' ] ) wp_cache_debug( 'Removing auth from $_COOKIE to allow caching for logged user (' . $cookie . ')', 5 );
578	unset( $_COOKIE[ $cookie ] );
579	}
580	}
581	}
582	}
583
584	?>
585