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mt.php.pre @ 2104

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Revision 2104, 30.9 kB (checked in by takayama, 19 months ago)
Implemented BugId:71811, BugId:79438 * Added SSI support into the Dynamic Publishing * Added cache option support
Property svn:keywords set to `Author Date Id Revision`

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1	<?php
2	# Movable Type (r) Open Source (C) 2004-2008 Six Apart, Ltd.
3	# This program is distributed under the terms of the
4	# GNU General Public License, version 2.
5	#
6	# $Id$
7
8	define('VERSION', '__API_VERSION__');
9	define('VERSION_ID', '__PRODUCT_VERSION_ID__');
10	define('PRODUCT_VERSION', '__PRODUCT_VERSION__');
11	define('PRODUCT_NAME', '__PRODUCT_NAME__');
12
13	global $Lexicon;
14	$Lexicon = array();
15
16	class MT {
17	var $mime_types = array(
18	'__default__' => 'text/html',
19	'css' => 'text/css',
20	'txt' => 'text/plain',
21	'rdf' => 'text/xml',
22	'rss' => 'text/xml',
23	'xml' => 'text/xml',
24	);
25	var $blog_id;
26	var $db;
27	var $config;
28	var $debugging = false;
29	var $caching = false;
30	var $conditional = false;
31	var $log = array();
32	var $id;
33	var $request;
34	var $http_error;
35	var $cfg_file;
36	var $cache_driver;
37
38	/***
39	* Constructor for MT class. Also declares a global variable
40	* '$mt' and assigns itself to that. There can only be one
41	* instance of this class.
42	*/
43	function MT($blog_id = null, $cfg_file = null) {
44	error_reporting(E_ALL ^ E_NOTICE);
45	global $mt;
46	if (isset($mt)) {
47	die("Only one instance of the MT class can be created.");
48	}
49	$this->id = md5(uniqid('MT',true));
50	$this->init($blog_id, $cfg_file);
51	}
52
53	function init($blog_id = null, $cfg_file = null) {
54	if (isset($blog_id)) {
55	$this->blog_id = $blog_id;
56	}
57
58	if (!file_exists($cfg_file)) {
59	$mtdir = dirname(dirname(__FILE__));
60	$cfg_file = $mtdir . DIRECTORY_SEPARATOR . "mt-config.cgi";
61	}
62
63	$this->configure($cfg_file);
64	$this->init_addons();
65	$this->configure_from_db();
66
67	$lang = substr(strtolower($this->config('DefaultLanguage')), 0, 2);
68	if (!@include_once("l10n_$lang.php"))
69	include_once("l10n_en.php");
70
71	if (extension_loaded('mbstring')) {
72	$charset = $this->config('PublishCharset');
73	mb_internal_encoding($charset);
74	mb_http_output($charset);
75	}
76	}
77
78	function init_addons() {
79	$mtdir = dirname(dirname(__FILE__));
80	$path = $mtdir . DIRECTORY_SEPARATOR . "addons";
81	if (is_dir($path)) {
82	$ctx =& $this->context();
83	if ($dh = opendir($path)) {
84	while (($file = readdir($dh)) !== false) {
85	if ($file == "." \|\| $file == "..") {
86	continue;
87	}
88	$plugin_dir = $path . DIRECTORY_SEPARATOR . $file
89	. DIRECTORY_SEPARATOR . 'php';
90	if (is_dir($plugin_dir))
91	$ctx->add_plugin_dir($plugin_dir);
92	}
93	closedir($dh);
94	}
95	}
96	}
97
98	function init_plugins() {
99	$plugin_paths = $this->config('PluginPath');
100	$ctx =& $this->context();
101
102	foreach ($plugin_paths as $path) {
103	if ($dh = opendir($path)) {
104	while (($file = readdir($dh)) !== false) {
105	if ($file == "." \|\| $file == "..")
106	continue;
107	$plugin_dir = $path . DIRECTORY_SEPARATOR . $file
108	. DIRECTORY_SEPARATOR . 'php';
109	if (is_dir($plugin_dir))
110	$ctx->add_plugin_dir($plugin_dir);
111	}
112	closedir($dh);
113	}
114	}
115
116	$plugin_dir = $this->config('PHPDir') . DIRECTORY_SEPARATOR
117	. 'plugins';
118	if (is_dir($plugin_dir))
119	$ctx->add_plugin_dir($plugin_dir);
120
121	# Load any php directories found during the 'init_addons' loop
122	foreach ($ctx->plugins_dir as $plugin_dir)
123	if (is_dir($plugin_dir))
124	$this->load_plugin($plugin_dir);
125	}
126
127	function load_plugin($plugin_dir) {
128	$ctx =& $this->context();
129	// global filters have to be handled differently from
130	// tag attributes, so this causes them to be recognized
131	// as they should...
132	if ($dh = opendir($plugin_dir)) {
133	while (($file = readdir($dh)) !== false) {
134	if (preg_match('/^modifier\.(.+?)\.php$/', $file, $matches)) {
135	$ctx->add_global_filter($matches[1]);
136	} elseif (preg_match('/^init\.(.+?)\.php$/', $file, $matches)) {
137	// load 'init' plugin file
138	require_once($file);
139	}
140	}
141	closedir($dh);
142	}
143	}
144
145	/***
146	* Retreives a handle to the database and assigns it to
147	* the member variable 'db'.
148	*/
149	function &db() {
150	if (isset($this->db)) return $this->db;
151
152	require_once("mtdb_".$this->config('DBDriver').".php");
153	$mtdbclass = 'MTDatabase_'.$this->config('DBDriver');
154	$this->db = new $mtdbclass($this->config('DBUser'),
155	$this->config('DBPassword'), $this->config('Database'),
156	$this->config('DBHost'), $this->config('DBPort'), $this->config('DBSocket'));
157	return $this->db;
158	}
159
160	/***
161	* Retreives a handle to the cache driver.
162	*/
163	function &cache_driver() {
164	if (isset($this->cache_driver)) return $this->cache_driver;
165
166	# Check for memcached enabled
167	$servers = $this->config['MemcachedServers'];
168	if (isset($servers)) {
169	if (extension_loaded('memcache')) {
170	require_once("MTCache_memcached.php");
171	$this->cache_driver = new MTCache_memcached($servers);
172	}
173	} else {
174	require_once("MTCache_session.php");
175	$this->cache_driver = new MTCache_session();
176	}
177	return $this->cache_driver;
178	}
179
180	function config($id, $value = null) {
181	$id = strtolower($id);
182	if (isset($value))
183	$this->config[$id] = $value;
184	return $this->config[$id];
185	}
186
187	/***
188	* Loads configuration data from mt.cfg and mt-db-pass.cgi files.
189	* Stores content in the 'config' member variable.
190	*/
191	function configure($file = null) {
192	if (isset($this->config)) return $config;
193
194	$this->cfg_file = $file;
195
196	$cfg = array();
197	$type_array = array('pluginpath', 'alttemplate', 'outboundtrackbackdomains', 'memcachedservers');
198	if ($fp = file($file)) {
199	foreach ($fp as $line) {
200	// search through the file
201	if (!ereg('^\s*\#',$line)) {
202	// ignore lines starting with the hash symbol
203	if (preg_match('/^\s(\S+)\s+(.)$/', $line, $regs)) {
204	$key = strtolower(trim($regs[1]));
205	$value = trim($regs[2]);
206	if (in_array($key, $type_array)) {
207	$cfg[$key][] = $value;
208	} else {
209	$cfg[$key] = $value;
210	}
211	}
212	}
213	}
214	} else {
215	die("Unable to open configuration file $file");
216	}
217
218	// setup directory locations
219	// location of mt.php
220	$cfg['phpdir'] = realpath(dirname(__FILE__));
221	// path to MT directory
222	$cfg['mtdir'] = realpath(dirname($file));
223	// path to handlers
224	$cfg['phplibdir'] = $cfg['phpdir'] . DIRECTORY_SEPARATOR . 'lib';
225
226	$cfg['dbhost'] or $cfg['dbhost'] = 'localhost'; // default to localhost
227	$driver = $cfg['objectdriver'];
228	$driver = preg_replace('/^DB[ID]::/', '', $driver);
229	$driver or $driver = 'mysql';
230	$cfg['dbdriver'] = strtolower($driver);
231
232	if ((strlen($cfg['database'])<1 \|\| strlen($cfg['dbuser'])<1)) {
233	if (($cfg['dbdriver'] != 'sqlite') && ($cfg['dbdriver'] != 'mssqlserver')) {
234	die("Unable to read database or username");
235	}
236	}
237
238	// Changes dbdriver from native to PDO, if we can.
239	// * PHP Version >= 5.0
240	// * DBDriver == sqlite / with out UseSQLite2
241	// * PDO and PDO_SQLITE extensions loaded
242	if (version_compare(PHP_VERSION, '5.0') > 0
243	&& $cfg['dbdriver'] == 'sqlite'
244	&& !isset($cfg['usesqlite2'])
245	&& extension_loaded('pdo')
246	&& extension_loaded('pdo_sqlite'))
247	{
248	$cfg['dbdriver'] = 'pdo_sqlite';
249	}
250	$this->config =& $cfg;
251	$this->config_defaults();
252
253	// read in the database password
254	if (!isset($cfg['dbpassword'])) {
255	$db_pass_file = $cfg['mtdir'] . DIRECTORY_SEPARATOR . 'mt-db-pass.cgi';
256	if (file_exists($db_pass_file)) {
257	$password = implode('', file($db_pass_file));
258	$password = trim($password, "\n\r\0");
259	$cfg['dbpassword'] = $password;
260	}
261	}
262
263	// set up include path
264	// add MT-PHP 'plugins' and 'lib' directories to the front
265	// of the existing PHP include path:
266	if (strtoupper(substr(PHP_OS, 0,3) == 'WIN')) {
267	$path_sep = ';';
268	} else {
269	$path_sep = ':';
270	}
271	ini_set('include_path',
272	$cfg['phpdir'] . DIRECTORY_SEPARATOR . "lib" . $path_sep .
273	$cfg['phpdir'] . DIRECTORY_SEPARATOR . "extlib" . $path_sep .
274	$cfg['phpdir'] . DIRECTORY_SEPARATOR . "extlib" . DIRECTORY_SEPARATOR . "smarty" . DIRECTORY_SEPARATOR . "libs" . $path_sep .
275	ini_get('include_path')
276	);
277	}
278
279	function configure_from_db() {
280	$cfg =& $this->config;
281	$mtdb =& $this->db();
282	$db_config = $mtdb->fetch_config();
283	if ($db_config) {
284	$data = $db_config['config_data'];
285	$data = preg_split('/[\r?\n]/', $data);
286	foreach ($data as $line) {
287	// search through the file
288	if (!ereg('^\s*\#',$line)) {
289	// ignore lines starting with the hash symbol
290	if (preg_match('/^\s(\S+)\s+(.)$/', $line, $regs)) {
291	$key = strtolower(trim($regs[1]));
292	$value = trim($regs[2]);
293	if (($key == 'PluginSwitch') \|\| ($key == 'PluginSchemaVersion')) { # special case for hash
294	if (preg_match('/^(.+)=(.+)$/', $value, $match))
295	$cfg[$key][trim($match[1])] = trim($match[2]);
296	} else {
297	$cfg[$key] or $cfg[$key] = $value;
298	}
299	}
300	}
301	}
302	if ($cfg['dbdriver'] == 'mysql' or $cfg['dbdriver'] == 'postgres') {
303	if ($cfg['sqlsetnames']) {
304	$Charset = array(
305	'postgres' => array('utf-8' => 'UNICODE', 'shift_jis' => 'SJIS', 'euc-jp' => 'EUC_JP'),
306	'mysql' => array('utf-8' => 'utf8', 'shift_jis' => 'sjis', 'euc-jp' => 'ujis'));
307	$lang = $Charset[$cfg['dbdriver']][strtolower($cfg['publishcharset'])];
308	if ($lang) {
309	$mtdb->query("SET NAMES '$lang'");
310	}
311	}
312	}
313	}
314	}
315
316	function config_defaults() {
317	$cfg =& $this->config;
318	// assign defaults:
319	if (substr($cfg['cgipath'], strlen($cfg['cgipath']) - 1, 1) != '/')
320	$cfg['cgipath'] .= '/';
321	isset($cfg['staticwebpath']) or
322	$cfg['staticwebpath'] = $cfg['cgipath'] . 'mt-static/';
323	isset($cfg['publishcharset']) or
324	$cfg['publishcharset'] = '__PUBLISH_CHARSET__';
325	isset($cfg['trackbackscript']) or
326	$cfg['trackbackscript'] = 'mt-tb.cgi';
327	isset($cfg['adminscript']) or
328	$cfg['adminscript'] = 'mt.cgi';
329	isset($cfg['commentscript']) or
330	$cfg['commentscript'] = 'mt-comments.cgi';
331	isset($cfg['atomscript']) or
332	$cfg['atomscript'] = 'mt-atom.cgi';
333	isset($cfg['xmlrpcscript']) or
334	$cfg['xmlrpcscript'] = 'mt-xmlrpc.cgi';
335	isset($cfg['searchscript']) or
336	$cfg['searchscript'] = 'mt-search.cgi';
337	isset($cfg['defaultlanguage']) or
338	$cfg['defaultlanguage'] = '__BUILD_LANGUAGE__';
339	isset($cfg['globalsanitizespec']) or
340	$cfg['globalsanitizespec'] = 'a href,b,i,br/,p,strong,em,ul,ol,li,blockquote,pre';
341	isset($cfg['signonurl']) or
342	$cfg['signonurl'] = 'https://www.typekey.com/t/typekey/login?';
343	isset($cfg['signoffurl']) or
344	$cfg['signoffurl'] = 'https://www.typekey.com/t/typekey/logout?';
345	isset($cfg['identityurl']) or
346	$cfg['identityurl'] = 'http://profile.typekey.com/';
347	isset($cfg['publishcommentericon']) or
348	$cfg['publishcommentericon'] = '1';
349	isset($cfg['allowcomments']) or
350	$cfg['allowcomments'] = '1';
351	isset($cfg['allowpings']) or
352	$cfg['allowpings'] = '1';
353	isset($cfg['indexbasename']) or
354	$cfg['indexbasename'] = 'index';
355	isset($cfg['typekeyversion']) or
356	$cfg['typekeyversion'] = '1.1';
357	isset($cfg['assetcachedir']) or
358	$cfg['assetcachedir'] = 'assets_c';
359	isset($cfg['userpicthumbnailsize']) or
360	$cfg['userpicthumbnailsize'] = '100';
361	isset($cfg['pluginpath']) or
362	$cfg['pluginpath'] = array($this->config('MTDir') . DIRECTORY_SEPARATOR . 'plugins');
363	isset($cfg['timeoffset']) or
364	$cfg['timeoffset'] = '__DEFAULT_TIMEZONE__';
365	isset($cfg['includesdir']) or
366	$cfg['includesdir'] = 'includes_c';
367	}
368
369	function configure_paths($blog_site_path) {
370	if (preg_match('/^\./', $blog_site_path)) {
371	// relative address, so tack on the MT dir in front
372	$blog_site_path = $this->config('MTDir') .
373	DIRECTORY_SEPARATOR . $blog_site_path;
374	}
375	$this->config('PHPTemplateDir') or
376	$this->config('PHPTemplateDir', $blog_site_path .
377	DIRECTORY_SEPARATOR . 'templates');
378	$this->config('PHPCacheDir') or
379	$this->config('PHPCacheDir', $blog_site_path .
380	DIRECTORY_SEPARATOR . 'cache');
381
382	$ctx =& $this->context();
383	$ctx->template_dir = $this->config('PHPTemplateDir');
384	$ctx->compile_dir = $ctx->template_dir . '_c';
385	$ctx->cache_dir = $this->config('PHPCacheDir');
386	}
387
388	/***
389	* Mainline handler function.
390	*/
391	function view($blog_id = null) {
392	if ($this->debugging) {
393	require_once("MTUtil.php");
394	}
395	$blog_id or $blog_id = $this->blog_id;
396
397	$ctx =& $this->context();
398	$this->init_plugins();
399	$ctx->caching = $this->caching;
400
401	// Some defaults...
402	$mtdb =& $this->db();
403	$ctx->mt->db =& $mtdb;
404
405	// Set up our customer error handler
406	set_error_handler(array(&$this, 'error_handler'));
407
408	// User-specified request through request variable
409	$path = $this->request;
410
411	// Apache request
412	if (!$path && $_SERVER['REQUEST_URI']) {
413	$path = $_SERVER['REQUEST_URI'];
414	// strip off any query string...
415	$path = preg_replace('/\?.*/', '', $path);
416	// strip any duplicated slashes...
417	$path = preg_replace('!/+!', '/', $path);
418	}
419
420	// IIS request by error document...
421	if (preg_match('/IIS/', $_SERVER['SERVER_SOFTWARE'])) {
422	// assume 404 handler
423	if (preg_match('/^\d+;(.*)$/', $_SERVER['QUERY_STRING'], $matches)) {
424	$path = $matches[1];
425	$path = preg_replace('!^http://[^/]+!', '', $path);
426	if (preg_match('/\?(.+)?/', $path, $matches)) {
427	$_SERVER['QUERY_STRING'] = $matches[1];
428	$path = preg_replace('/\?.*$/', '', $path);
429	}
430	}
431	}
432
433	// now set the path so it may be queried
434	$this->request = $path;
435
436	// When we are invoked as an ErrorDocument, the parameters are
437	// in the environment variables REDIRECT_*
438	if (isset($_SERVER['REDIRECT_QUERY_STRING'])) {
439	// todo: populate $_GET and QUERY_STRING with REDIRECT_QUERY_STRING
440	$_SERVER['QUERY_STRING'] = getenv('REDIRECT_QUERY_STRING');
441	}
442
443	if (preg_match('/\.(\w+)$/', $path, $matches)) {
444	$req_ext = strtolower($matches[1]);
445	}
446
447	$this->blog_id = $blog_id;
448
449	$data =& $this->resolve_url($path);
450	if (!$data) {
451	// 404!
452	$this->http_error = 404;
453	header("HTTP/1.1 404 Not found");
454	return $ctx->error($this->translate("Page not found - [_1]", $path), E_USER_ERROR);
455	}
456
457	$info =& $data['fileinfo'];
458	$fi_path = $info['fileinfo_url'];
459	$fid = $info['fileinfo_id'];
460	$at = $info['fileinfo_archive_type'];
461	$ts = $info['fileinfo_startdate'];
462	$tpl_id = $info['fileinfo_template_id'];
463	$cat = $info['fileinfo_category_id'];
464	$auth = $info['fileinfo_author_id'];
465	$entry_id = $info['fileinfo_entry_id'];
466	$blog_id = $info['fileinfo_blog_id'];
467	$blog =& $data['blog'];
468	if ($at == 'index') {
469	$at = null;
470	$ctx->stash('index_archive', true);
471	} else {
472	$ctx->stash('index_archive', false);
473	}
474	$tts = $data['template']['template_modified_on'];
475	if ($tts) {
476	$tts = offset_time(datetime_to_timestamp($tts), $blog);
477	}
478	$ctx->stash('template_timestamp', $tts);
479	$ctx->stash('template_created_on', $data['template']['template_created_on']);
480
481	$columns_map = array(
482	'layout-wt' => 2,
483	'layout-tw' => 2,
484	'layout-wm' => 2,
485	'layout-mw' => 2,
486	'layout-wtt' => 3,
487	'layout-twt' => 3);
488	$page_layout = $data['blog']['blog_page_layout'];
489	$columns = 0;
490	if(array_key_exists($page_layout, $columns_map))
491	$columns = $columns_map[$page_layout];
492	$vars =& $ctx->__stash['vars'];
493	$vars['page_columns'] = $columns;
494	$vars['page_layout'] = $page_layout;
495
496	if (isset($data['template']['template_identifier']))
497	$vars[$data['template']['template_identifier']] = 1;
498
499	$this->configure_paths($blog['blog_site_path']);
500
501	// start populating our stash
502	$ctx->stash('blog_id', $blog_id);
503	$ctx->stash('blog', $blog);
504	$ctx->stash('build_template_id', $tpl_id);
505
506	// conditional get support...
507	if ($this->caching) {
508	$this->cache_modified_check = true;
509	}
510	if ($this->conditional) {
511	$last_ts = $blog['blog_children_modified_on'];
512	$last_modified = $ctx->_hdlr_date(array('ts' => $last_ts, 'format' => '%a, %d %b %Y %H:%M:%S GMT', 'language' => 'en', 'utc' => 1), $ctx);
513	$this->doConditionalGet($last_modified);
514	}
515
516	$cache_id = $blog_id.';'.$fi_path;
517	if (!$ctx->is_cached('mt:'.$tpl_id, $cache_id)) {
518	if (isset($at) && ($at != 'Category')) {
519	global $_archivers;
520	require_once("archive_lib.php");
521	global $_archivers;
522	if (!isset($_archivers[$at])) {
523	// 404
524	$this->http_errr = 404;
525	header("HTTP/1.1 404 Not Found");
526	return $ctx->error($this->translate("Page not found - [_1]", $at), E_USER_ERROR);
527	}
528	$archiver = $_archivers[$at];
529	$archiver->template_params($ctx);
530	}
531
532	if ($cat) {
533	$archive_category = $mtdb->fetch_category($cat);
534	$ctx->stash('category', $archive_category);
535	$ctx->stash('archive_category', $archive_category);
536	}
537	if ($auth) {
538	$archive_author = $mtdb->fetch_author($auth);
539	$ctx->stash('author', $archive_author);
540	$ctx->stash('archive_author', $archive_author);
541	}
542	if (isset($at)) {
543	if (($at != 'Category') && isset($ts)) {
544	list($ts_start, $ts_end) = $archiver->get_range($ctx, $ts);
545	$ctx->stash('current_timestamp', $ts_start);
546	$ctx->stash('current_timestamp_end', $ts_end);
547	}
548	$ctx->stash('current_archive_type', $at);
549	}
550
551	if (isset($entry_id) && ($entry_id) && ($at == 'Individual' \|\| $at == 'Page')) {
552	if ($at == 'Individual') {
553	$entry =& $mtdb->fetch_entry($entry_id);
554	} elseif($at == 'Page') {
555	$entry =& $mtdb->fetch_page($entry_id);
556	}
557	$ctx->stash('entry', $entry);
558	$ctx->stash('current_timestamp', $entry['entry_authored_on']);
559	}
560
561	if ($at == 'Category') {
562	$vars =& $ctx->__stash['vars'];
563	$vars['archive_class'] = "category-archive";
564	$vars['category_archive'] = 1;
565	$vars['archive_template'] = 1;
566	$vars['module_category-monthly_archives'] = 1;
567	}
568	}
569
570	$output = $ctx->fetch('mt:'.$tpl_id, $cache_id);
571
572	$this->http_error = 200;
573	header("HTTP/1.1 200 OK");
574	// content-type header-- need to supplement with charset
575	$content_type = $ctx->stash('content_type');
576
577	if (!isset($content_type)) {
578	$content_type = $this->mime_types['__default__'];
579	if ($req_ext && (isset($this->mime_types[$req_ext]))) {
580	$content_type = $this->mime_types[$req_ext];
581	}
582	}
583	$charset = $this->config('PublishCharset');
584	if (isset($charset)) {
585	if (!preg_match('/charset=/', $content_type))
586	$content_type .= '; charset=' . $charset;
587	}
588	header("Content-Type: $content_type");
589
590	// finally, issue output
591	$output = preg_replace('/^\s*/', '', $output);
592	echo $output;
593
594	if ($this->debugging) {
595	$this->log("Queries: ".$mtdb->num_queries);
596	$this->log("Queries executed:");
597	$queries = $mtdb->savedqueries;
598	foreach ($queries as $q) {
599	$this->log($q);
600	}
601	$this->log_dump();
602	}
603	restore_error_handler();
604	}
605
606	function &resolve_url($path) {
607	$data =& $this->db->resolve_url($path, $this->blog_id);
608	if ( isset($data)
609	&& isset($data['fileinfo']['fileinfo_entry_id'])
610	&& is_numeric($data['fileinfo']['fileinfo_entry_id'])
611	) {
612	if (strtolower($data['templatemap']['templatemap_archive_type']) == 'page') {
613	$entry = $this->db->fetch_page($data['fileinfo']['fileinfo_entry_id']);
614	} else {
615	$entry = $this->db->fetch_entry($data['fileinfo']['fileinfo_entry_id']);
616	}
617	require_once('function.mtentrystatus.php');
618	if (!isset($entry) \|\| $entry['entry_status'] != STATUS_RELEASE)
619	return;
620	}
621	return $data;
622	}
623
624	function doConditionalGet($last_modified) {
625	// Thanks to Simon Willison...
626	// http://simon.incutio.com/archive/2003/04/23/conditionalGet
627	// A PHP implementation of conditional get, see
628	// http://fishbowl.pastiche.org/archives/001132.html
629	$etag = '"'.md5($last_modified).'"';
630	// Send the headers
631	header("Last-Modified: $last_modified");
632	header("ETag: $etag");
633	// See if the client has provided the required headers
634	$if_modified_since = isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) ?
635	stripslashes($_SERVER['HTTP_IF_MODIFIED_SINCE']) :
636	false;
637	$if_none_match = isset($_SERVER['HTTP_IF_NONE_MATCH']) ?
638	stripslashes($_SERVER['HTTP_IF_NONE_MATCH']) :
639	false;
640	if (!$if_modified_since && !$if_none_match) {
641	return;
642	}
643	// At least one of the headers is there - check them
644	if ($if_none_match && $if_none_match != $etag) {
645	return; // etag is there but doesn't match
646	}
647	if ($if_modified_since && $if_modified_since != $last_modified) {
648	return; // if-modified-since is there but doesn't match
649	}
650	// Nothing has changed since their last request - serve a 304 and exit
651	header('HTTP/1.1 304 Not Modified');
652	exit;
653	}
654
655	function display($tpl, $cid = null) {
656	$ctx =& $this->context();
657	$this->init_plugins();
658	$blog =& $ctx->stash('blog');
659	if (!$blog) {
660	$db =& $this->db();
661	$ctx->mt->db =& $db;
662	$blog =& $db->fetch_blog($this->blog_id);
663	$ctx->stash('blog', $blog);
664	$ctx->stash('blog_id', $this->blog_id);
665	$this->configure_paths($blog['blog_site_path']);
666	}
667	return $ctx->display($tpl, $cid);
668	}
669
670	function fetch($tpl, $cid = null) {
671	$ctx =& $this->context();
672	$this->init_plugins();
673	$blog =& $ctx->stash('blog');
674	if (!$blog) {
675	$db =& $this->db();
676	$ctx->mt->db =& $db;
677	$blog =& $db->fetch_blog($this->blog_id);
678	$ctx->stash('blog', $blog);
679	$ctx->stash('blog_id', $this->blog_id);
680	$this->configure_paths($blog['blog_site_path']);
681	}
682	return $ctx->fetch($tpl, $cid);
683	}
684
685	function log_dump() {
686	if ($_SERVER['REMOTE_ADDR']) {
687	// web view...
688	echo "<div class=\"debug\" style=\"border:1px solid red; margin:0.5em; padding: 0 1em; text-align:left; background-color:#ddd; color:#000\"><pre>";
689	echo implode("\n", $this->log);
690	echo "</pre></div>\n\n";
691	} else {
692	// console view...
693	$stderr = fopen('php://stderr', 'w');
694	fwrite($stderr,implode("\n", $this->log));
695	echo (implode("\n", $this->log));
696	fclose($stderr);
697	}
698	}
699
700	function error_handler($errno, $errstr, $errfile, $errline) {
701	if ($errno & (E_ALL ^ E_NOTICE)) {
702	if (version_compare(phpversion(), '4.3.0', '>=')) {
703	$charset = $this->config('PublishCharset');
704	$errstr = htmlentities($errstr, ENT_COMPAT, $charset);
705	$errfile = htmlentities($errfile, ENT_COMPAT, $charset);
706	} else {
707	$errstr = htmlentities($errstr, ENT_COMPAT);
708	$errfile = htmlentities($errfile, ENT_COMPAT);
709	}
710	$mtphpdir = $this->config('PHPDir');
711	$ctx =& $this->context();
712	$ctx->stash('blog_id', $this->blog_id);
713	$ctx->stash('blog', $this->db->fetch_blog($this->blog_id));
714	$ctx->stash('error_message', $errstr."<!-- file: $errfile; line: $errline; code: $errno -->");
715	$ctx->stash('error_code', $errno);
716	$http_error = $this->http_error;
717	if (!$http_error) {
718	$http_error = 500;
719	}
720	$ctx->stash('http_error', $http_error);
721	$ctx->stash('error_file', $errfile);
722	$ctx->stash('error_line', $errline);
723	$ctx->template_dir = $mtphpdir . DIRECTORY_SEPARATOR . 'tmpl';
724	$ctx->caching = 0;
725	$ctx->stash('StaticWebPath', $this->config('StaticWebPath'));
726	$ctx->stash('PublishCharset', $this->config('PublishCharset'));
727	$charset = $this->config('PublishCharset');
728	$out = $ctx->tag('Include', array('type' => 'dynamic_error', 'dynamic_error' => 1, 'system_template' => 1));
729	if (isset($out)) {
730	header("Content-type: text/html; charset=".$charset);
731	echo $out;
732	} else {
733	header("HTTP/1.1 500 Server Error");
734	header("Content-type: text/plain");
735	echo "Error executing error template.";
736	}
737	exit;
738	}
739	}
740
741	/***
742	* Retrieves a context and rendering object.
743	*/
744	function &context() {
745	static $ctx;
746	if (isset($ctx)) return $ctx;
747
748	require_once('MTViewer.php');
749	$ctx = new MTViewer($this);
750	$ctx->mt =& $this;
751	$mtphpdir = $this->config('PHPDir');
752	$mtlibdir = $this->config('PHPLibDir');
753	$ctx->compile_check = 1;
754	$ctx->caching = false;
755	$ctx->plugins_dir[] = $mtlibdir;
756	$ctx->plugins_dir[] = $mtphpdir . DIRECTORY_SEPARATOR . "plugins";
757	if ($this->debugging) {
758	$ctx->debugging_ctrl = 'URL';
759	$ctx->debug_tpl = $mtphpdir . DIRECTORY_SEPARATOR .
760	'extlib' . DIRECTORY_SEPARATOR .
761	'smarty' . DIRECTORY_SEPARATOR . "libs" . DIRECTORY_SEPARATOR .
762	'debug.tpl';
763	}
764	#if (isset($this->config('SafeMode')) && ($this->config('SafeMode'))) {
765	# // disable PHP support
766	# $ctx->php_handling = SMARTY_PHP_REMOVE;
767	#}
768	return $ctx;
769	}
770
771	function log($msg = null) {
772	$this->log[] = $msg;
773	}
774
775	function translate($str, $params = null) {
776	return translate_phrase($str, $params);
777	}
778
779	function translate_templatized_item($str) {
780	return translate_phrase($str[1]);
781	}
782
783	function translate_templatized($tmpl) {
784	$cb = array($this, 'translate_templatized_item');
785	$out = preg_replace_callback('/<(?:_\|mt)_trans phrase="(.+?)".*?>/i', $cb, $tmpl);
786	return $out;
787	}
788	}
789
790	function is_valid_email($addr) {
791	if (preg_match('/[ \|\t\|\r\|\n]\"?([^\"]+\"?@[^ <>\t]+\.[^ <>\t][^ <>\t]+)[ \|\t\|\r\|\n]/', $addr, $matches)) {
792	return $matches[1];
793	} else {
794	return 0;
795	}
796	}
797
798	$spam_protect_map = array(':' => ':', '@' => '@', '.' => '.');
799	function spam_protect($str) {
800	global $spam_protect_map;
801	return strtr($str, $spam_protect_map);
802	}
803
804	function datetime_to_timestamp($dt) {
805	$dt = preg_replace('/[^0-9]/', '', $dt);
806	$ts = mktime(substr($dt, 8, 2), substr($dt, 10, 2), substr($dt, 12, 2), substr($dt, 4, 2), substr($dt, 6, 2), substr($dt, 0, 4));
807	return $ts;
808	}
809
810	function offset_time($ts, $blog = null, $dir = null) {
811	if (isset($blog)) {
812	if (!is_array($blog)) {
813	global $mt;
814	$blog = $mt->db->fetch_blog($blog);
815	}
816	$offset = $blog['blog_server_offset'];
817	} else {
818	global $mt;
819	$offset = $mt->config('TimeOffset');
820	}
821	intval($offset) or $offset = 0;
822	$tsa = localtime($ts);
823
824	if ($tsa[8]) { // daylight savings offset
825	$offset++;
826	}
827	if ($dir == '-') {
828	$offset *= -1;
829	}
830	$ts += $offset * 3600;
831	return $ts;
832	}
833	function _strip_index($url, $blog) {
834	global $mt;
835	$index = $mt->config('IndexBasename');
836	$ext = $blog['blog_file_extension'];
837	if ($ext != '') $ext = '.' . $ext;
838	$index = preg_quote($index . $ext);
839	$url = preg_replace("/\/$index(#.*)?$/", '/$1', $url);
840	return $url;
841	}
842
843	function translate_phrase_param($str, $params = null) {
844	if (is_array($params) && (strpos($str, '[_') !== false)) {
845	for ($i = 1; $i <= count($params); $i++) {
846	$str = preg_replace("/\\[_$i\\]/", $params[$i-1], $str);
847	}
848	}
849	return $str;
850	}
851	?>

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