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source: trunk/lib/App.inc.php @ 734

Last change on this file since 734 was 734, checked in by anonymous, 4 years ago
Remove 'www.' from hostname in logMsg()
File size: 87.9 KB

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1	<?php
2	/**
3	* The Strangecode Codebase - a general application development framework for PHP
4	* For details visit the project site: <http://trac.strangecode.com/codebase/>
5	* Copyright 2001-2012 Strangecode, LLC
6	*
7	* This file is part of The Strangecode Codebase.
8	*
9	* The Strangecode Codebase is free software: you can redistribute it and/or
10	* modify it under the terms of the GNU General Public License as published by the
11	* Free Software Foundation, either version 3 of the License, or (at your option)
12	* any later version.
13	*
14	* The Strangecode Codebase is distributed in the hope that it will be useful, but
15	* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
17	* details.
18	*
19	* You should have received a copy of the GNU General Public License along with
20	* The Strangecode Codebase. If not, see <http://www.gnu.org/licenses/>.
21	*/
22
23	/**
24	* App.inc.php
25	*
26	* Primary application framework class.
27	*
28	* @author Quinn Comendant <quinn@strangecode.com>
29	* @version 2.1
30	*/
31
32	// Message Types.
33	define('MSG_ERR', 1);
34	define('MSG_ERROR', MSG_ERR);
35	define('MSG_WARNING', 2);
36	define('MSG_NOTICE', 4);
37	define('MSG_SUCCESS', 8);
38	define('MSG_ALL', MSG_SUCCESS \| MSG_NOTICE \| MSG_WARNING \| MSG_ERROR);
39
40	require_once dirname(__FILE__) . '/Utilities.inc.php';
41
42	class App
43	{
44	// Minimum version of PHP required for this version of the Codebase.
45	const CODEBASE_MIN_PHP_VERSION = '5.3.0';
46
47	// A place to keep an object instance for the singleton pattern.
48	protected static $instance = null;
49
50	// Namespace of this application instance.
51	protected $_ns;
52
53	// If $app->start has run successfully.
54	public $running = false;
55
56	// Instance of database object (from mysql_connect() PHP version < 7).
57	public $db;
58
59	// Instance of PDO object.
60	public $pdo;
61
62	// Instance of database session handler object.
63	public $db_session;
64
65	// Array of query arguments will be carried persistently between requests.
66	protected $_carry_queries = array();
67
68	// Array of raised message counters.
69	protected $_raised_msg_counter = array(MSG_NOTICE => 0, MSG_SUCCESS => 0, MSG_WARNING => 0, MSG_ERR => 0);
70
71	// We're running as CLI. Public because we must force this as false when testing sessions via CLI.
72	public $cli = false;
73
74	// Dictionary of global application parameters.
75	protected $_params = array();
76
77	// Default parameters.
78	protected $_param_defaults = array(
79
80	// Public name and email address for this application.
81	'site_name' => null,
82	'site_email' => '', // Set to no-reply@HTTP_HOST if not set here.
83	'site_hostname' => '', // The hostname of this application (if not set, derived from HTTP_HOST).
84	'site_port' => '', // The hostname of this application (if not set, derived from HTTP_HOST).
85	'site_url' => '', // URL to the root of the site (created during App->start()).
86	'page_url' => '', // URL to the current page (created during App->start()).
87	'images_path' => '', // Location for codebase-generated interface widgets (ex: "/admin/i").
88	'site_version' => '', // Version of this application (set automatically during start() if site_version_file is used).
89	'site_version_file' => 'docs/version.txt', // File containing version number of this app, relative to the include path.
90
91	// The location the user will go if the system doesn't know where else to send them.
92	'redirect_home_url' => '/',
93
94	// Use CSRF tokens. See notes in the getCSRFToken() method.
95	'csrf_token_enabled' => true,
96	// Form tokens will expire after this duration, in seconds.
97	'csrf_token_timeout' => 259200, // 259200 seconds = 3 days.
98	'csrf_token_name' => 'csrf_token',
99
100	// HMAC signing method
101	'signing_method' => 'sha512+base64',
102
103	// Content type of output sent in the Content-type: http header.
104	'content_type' => 'text/html',
105
106	// Allow HTTP caching with max-age setting. Possible values:
107	// >= 1 Allow HTTP caching with this value set as the max-age (in seconds, i.e., 3600 = 1 hour).
108	// 0 Disallow HTTP caching.
109	// false Don't send any cache-related HTTP headers (if you want to control this via server config or custom headers)
110	// This should be '0' for websites that use authentication or have frequently changing dynamic content.
111	'http_cache_headers' => 0,
112
113	// Character set for page output. Used in the Content-Type header and the HTML <meta content-type> tag.
114	'character_set' => 'utf-8',
115
116	// Human-readable format used to display dates.
117	'date_format' => 'd M Y',
118	'time_format' => 'h:i:s A',
119	'lc_date_format' => '%e %b %Y', // Localized date for strftime() https://www.php.net/manual/en/function.strftime.php
120	'lc_time_format' => '%k:%M', // Localized time for strftime() https://www.php.net/manual/en/function.strftime.php
121	'sql_date_format' => '%e %b %Y',
122	'sql_time_format' => '%k:%i',
123
124	// Timezone support. No codebase apps currently support switching timezones, but we explicitly set these so they're consistent.
125	'user_timezone' => 'UTC',
126	'php_timezone' => 'UTC',
127	'db_timezone' => 'UTC',
128
129	// Use php sessions?
130	'enable_session' => false,
131	'session_name' => '_session',
132	'session_use_cookies' => true,
133
134	// Pass the session-id through URLs if cookies are not enabled?
135	// Disable this to prevent session ID theft.
136	'session_use_trans_sid' => false,
137
138	// Use database?
139	'enable_db' => false,
140	'enable_db_pdo' => false,
141
142	// Use db-based sessions?
143	'enable_db_session_handler' => false,
144
145	// db_* parameters are passed to the DB object in $app->start().
146	// DB credentials should be set as apache environment variables in httpd.conf, readable only by root.
147	'db_server' => null,
148	'db_name' => null,
149	'db_user' => null,
150	'db_pass' => null,
151	'db_character_set' => '',
152	'db_collation' => '',
153
154	// CLI scripts will need this JSON file in the include path.
155	'db_auth_file' => 'db_auth.json',
156
157	// Database debugging.
158	'db_always_debug' => false, // TRUE = display all SQL queries.
159	'db_debug' => false, // TRUE = display db errors.
160	'db_die_on_failure' => false, // TRUE = script stops on db error.
161
162	// For classes that require db tables, do we check that a table exists and create if missing?
163	'db_create_tables' => true,
164
165	// The level of error reporting. Don't change this to suppress messages, instead use display_errors to control display.
166	'error_reporting' => E_ALL,
167
168	// Don't display errors by default; it is preferable to log them to a file. For CLI scripts, set this to the string 'stderr'.
169	'display_errors' => false,
170
171	// Directory in which to store log files.
172	'log_directory' => '',
173
174	// PHP error log.
175	'php_error_log' => 'php_error_log',
176
177	// General application log.
178	'log_filename' => 'app_log',
179
180	// Don't email or SMS duplicate messages that happen more often than this value (in seconds).
181	'log_multiple_timeout' => 3600, // Hourly
182
183	// Logging priority can be any of the following, or false to deactivate:
184	// LOG_EMERG system is unusable
185	// LOG_ALERT action must be taken immediately
186	// LOG_CRIT critical conditions
187	// LOG_ERR error conditions
188	// LOG_WARNING warning conditions
189	// LOG_NOTICE normal, but significant, condition
190	// LOG_INFO informational message
191	// LOG_DEBUG debug-level message
192	'log_file_priority' => LOG_INFO,
193	'log_email_priority' => false,
194	'log_sms_priority' => false,
195	'log_screen_priority' => false,
196
197	// Email address to receive log event emails. Use multiple addresses by separating them with commas.
198	'log_to_email_address' => null,
199
200	// SMS Email address to receive log event SMS messages. Use multiple addresses by separating them with commas.
201	'log_to_sms_address' => null,
202
203	// Should we avoid logging repeated logMsg() events? You might want to set this false if you need to see more accurate logging, particularly for long-running scripts.
204	'log_ignore_repeated_events' => true,
205
206	// Maximum length of log messages, in bytes.
207	'log_message_max_length' => 1024,
208
209	// Strip line-endings from log messages.
210	'log_serialize' => true,
211
212	// Temporary files directory.
213	'tmp_dir' => '/tmp',
214
215	// Session files directory. If not defined, the default value from php.ini will be used.
216	'session_dir' => '',
217
218	// A key for calculating simple cryptographic signatures. Set using as an environment variables in the httpd.conf with 'SetEnv SIGNING_KEY <key>'.
219	// Existing password hashes rely on the same key/salt being used to compare encryptions.
220	// Don't change this unless you know existing hashes or signatures will not be affected!
221	'signing_key' => 'aae6abd6209d82a691a9f96384a7634a',
222
223	// Force getFormData, getPost, and getGet to always run dispelMagicQuotes() with stripslashes().
224	// This should be set to 'true' when using the codebase with Wordpress because
225	// WP forcefully adds slashes to all input despite the setting of magic_quotes_gpc.
226	'always_dispel_magicquotes' => false,
227
228	// The /u pattern modifier should only be used on UTF-8 strings. This value will be changed to `u` if character_set = `utf-8`.
229	// Use the unicode modifier like this: preg_replace('/[^0-9]/' . $app->getParam('preg_u'), '', $str);
230	'preg_u' => '',
231	);
232
233	/**
234	* Constructor.
235	*/
236	public function __construct($namespace='')
237	{
238	// Initialize default parameters.
239	$this->_params = array_merge($this->_params, array('namespace' => $namespace), $this->_param_defaults);
240
241	// Begin timing script.
242	require_once dirname(__FILE__) . '/ScriptTimer.inc.php';
243	$this->timer = new ScriptTimer();
244	$this->timer->start('_app');
245
246	// Are we running as a CLI?
247	$this->cli = ('cli' === php_sapi_name() \|\| defined('_CLI'));
248	}
249
250	/**
251	* This method enforces the singleton pattern for this class. Only one application is running at a time.
252	*
253	* $param string $namespace Name of this application.
254	* @return object Reference to the global Cache object.
255	* @access public
256	* @static
257	*/
258	public static function &getInstance($namespace='')
259	{
260	if (self::$instance === null) {
261	// FIXME: Yep, having a namespace with one singleton instance is not very useful. This is a design flaw with the Codebase.
262	// We're currently getting instances of App throughout the codebase using `$app =& App::getInstance();`
263	// with no way to determine what the namespace of the containing application is (e.g., `public` vs. `admin`).
264	// Option 1: provide the project namespace to all classes that use App, and then instantiate with `$app =& App::getInstance($this->_ns);`.
265	// In this case the namespace of the App and the namespace of the auxiliary class must match.
266	// Option 2: may be to clone a specific instance to the "default" instance, so, e.g., `$app =& App::getInstance();`
267	// refers to the same namespace as `$app =& App::getInstance('admin');`
268	// Option 3: is to check if there is only one instance, and return it if an unspecified namespace is requested.
269	// However, in the case when multiple namespaces are in play at the same time, this will fail; unspecified namespaces
270	// would cause the creation of an additional instance, since there would not be an obvious named instance to return.
271	self::$instance = new self($namespace);
272	}
273
274	if ('' != $namespace) {
275	// We may not be able to request a specific instance, but we can specify a specific namespace.
276	// We're ignoring all instance requests with a blank namespace, so we use the last given one.
277	self::$instance->_ns = $namespace;
278	}
279
280	return self::$instance;
281	}
282
283	/**
284	* Set (or overwrite existing) parameters by passing an array of new parameters.
285	*
286	* @access public
287	* @param array $param Array of parameters (key => val pairs).
288	*/
289	public function setParam($param=null)
290	{
291	if (isset($param) && is_array($param)) {
292	// Merge new parameters with old overriding old ones that are passed.
293	$this->_params = array_merge($this->_params, $param);
294
295	if ($this->running) {
296	// Params that require additional processing if set during runtime.
297	foreach ($param as $key => $val) {
298	switch ($key) {
299	case 'namespace':
300	$this->logMsg(sprintf('Setting namespace not allowed', null), LOG_WARNING, __FILE__, __LINE__);
301	return false;
302
303	case 'session_name':
304	session_name($val);
305	return true;
306
307	case 'session_use_cookies':
308	if (session_status() !== PHP_SESSION_ACTIVE) {
309	ini_set('session.use_cookies', $val);
310	} else {
311	$this->logMsg('Unable to set session_use_cookies; session is already active', LOG_NOTICE, __FILE__, __LINE__);
312	}
313	return true;
314
315	case 'error_reporting':
316	ini_set('error_reporting', $val);
317	return true;
318
319	case 'display_errors':
320	ini_set('display_errors', $val);
321	return true;
322
323	case 'log_errors':
324	ini_set('log_errors', true);
325	return true;
326
327	case 'log_directory':
328	if (is_dir($val) && is_writable($val)) {
329	ini_set('error_log', $val . '/' . $this->getParam('php_error_log'));
330	}
331	return true;
332	}
333	}
334	}
335	}
336	}
337
338	/**
339	* Return the value of a parameter.
340	*
341	* @access public
342	* @param string $param The key of the parameter to return.
343	* @return mixed Parameter value, or null if not existing.
344	*/
345	public function getParam($param=null)
346	{
347	if ($param === null) {
348	return $this->_params;
349	} else if (array_key_exists($param, $this->_params)) {
350	return $this->_params[$param];
351	} else {
352	return null;
353	}
354	}
355
356	/**
357	* Begin running this application.
358	*
359	* @access public
360	* @author Quinn Comendant <quinn@strangecode.com>
361	* @since 15 Jul 2005 00:32:21
362	*/
363	public function start()
364	{
365	if ($this->running) {
366	return false;
367	}
368
369	// Error reporting.
370	ini_set('error_reporting', $this->getParam('error_reporting'));
371	ini_set('display_errors', $this->getParam('display_errors'));
372	ini_set('log_errors', true);
373	if (is_dir($this->getParam('log_directory')) && is_writable($this->getParam('log_directory'))) {
374	ini_set('error_log', $this->getParam('log_directory') . '/' . $this->getParam('php_error_log'));
375	}
376
377	// Set character set to use for multi-byte string functions.
378	mb_internal_encoding($this->getParam('character_set'));
379	ini_set('default_charset', $this->getParam('character_set'));
380	switch (mb_strtolower($this->getParam('character_set'))) {
381	case 'utf-8' :
382	$this->setParam(['preg_u' => 'u']);
383	mb_language('uni');
384	break;
385
386	case 'iso-2022-jp' :
387	mb_language('ja');
388	break;
389
390	case 'iso-8859-1' :
391	default :
392	mb_language('en');
393	break;
394	}
395
396	// Server timezone used internally by PHP.
397	if ($this->getParam('php_timezone')) {
398	$this->setTimezone($this->getParam('php_timezone'));
399	}
400
401	// If external request was HTTPS but internal request is HTTP, set $_SERVER['HTTPS']='on', which is used by the application to determine that TLS features should be enabled.
402	if (strtolower(getenv('HTTP_X_FORWARDED_PROTO')) == 'https' && strtolower(getenv('REQUEST_SCHEME')) == 'http') {
403	$this->logMsg(sprintf('Detected HTTPS via X-Forwarded-Proto; setting HTTPS=on', null), LOG_DEBUG, __FILE__, __LINE__);
404	putenv('HTTPS=on'); // Available via getenv(âŠ)
405	isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] = 'on'; // Available via $_SERVER[âŠ]
406	}
407
408	/**
409	* 1. Start Database.
410	*/
411
412	if (true === $this->getParam('enable_db') \|\| true === $this->getParam('enable_db_pdo')) {
413
414	// DB connection parameters taken from environment variables in the server httpd.conf file (readable only by root)âŠ
415	if (isset($_SERVER['DB_SERVER']) && '' != $_SERVER['DB_SERVER'] && null === $this->getParam('db_server')) {
416	$this->setParam(array('db_server' => $_SERVER['DB_SERVER']));
417	}
418	if (isset($_SERVER['DB_NAME']) && '' != $_SERVER['DB_NAME'] && null === $this->getParam('db_name')) {
419	$this->setParam(array('db_name' => $_SERVER['DB_NAME']));
420	}
421	if (isset($_SERVER['DB_USER']) && '' != $_SERVER['DB_USER'] && null === $this->getParam('db_user')) {
422	$this->setParam(array('db_user' => $_SERVER['DB_USER']));
423	}
424	if (isset($_SERVER['DB_PASS']) && '' != $_SERVER['DB_PASS'] && null === $this->getParam('db_pass')) {
425	$this->setParam(array('db_pass' => $_SERVER['DB_PASS']));
426	}
427
428	// DB credentials for CLI scripts stored in a JSON file with read rights given only to the user who will be executing the scripts: -r--------
429	// But not if all DB credentials have been defined already by other means.
430	if ($this->cli && '' != $this->getParam('db_auth_file') && (!$this->getParam('db_server') \|\| !$this->getParam('db_name') \|\| !$this->getParam('db_user') \|\| !$this->getParam('db_pass'))) {
431	if (false !== $db_auth_file = stream_resolve_include_path($this->getParam('db_auth_file'))) {
432	if (is_readable($db_auth_file)) {
433	$db_auth = json_decode(file_get_contents($db_auth_file), true);
434	if (is_null($db_auth)) {
435	$this->logMsg(sprintf('Unable to decode json in DB auth file: %s', $db_auth_file), LOG_ERR, __FILE__, __LINE__);
436	} else {
437	$this->setParam($db_auth);
438	}
439	} else {
440	$this->logMsg(sprintf('Unable to read DB auth file: %s', $db_auth_file), LOG_ERR, __FILE__, __LINE__);
441	}
442	} else {
443	$this->logMsg(sprintf('DB auth file not found: %s', $this->getParam('db_auth_file')), LOG_ERR, __FILE__, __LINE__);
444	}
445	}
446
447	// If the app wants a DB connection, always set up a PDO object.
448	require_once dirname(__FILE__) . '/PDO.inc.php';
449	$this->pdo =& \Strangecode\Codebase\PDO::getInstance();
450	$this->pdo->setParam(array(
451	'db_server' => $this->getParam('db_server'),
452	'db_name' => $this->getParam('db_name'),
453	'db_user' => $this->getParam('db_user'),
454	'db_pass' => $this->getParam('db_pass'),
455	'db_always_debug' => $this->getParam('db_always_debug'),
456	'db_debug' => $this->getParam('db_debug'),
457	'db_die_on_failure' => $this->getParam('db_die_on_failure'),
458	'timezone' => $this->getParam('db_timezone'),
459	'character_set' => $this->getParam('db_character_set'),
460	'collation' => $this->getParam('db_collation'),
461	));
462	$this->pdo->connect();
463
464	// Only create a legacy mysql_* DB object if it is explicitly requested.
465	if (true === $this->getParam('enable_db')) {
466	require_once dirname(__FILE__) . '/../polyfill/mysql.inc.php';
467	require_once dirname(__FILE__) . '/DB.inc.php';
468	$this->db =& DB::getInstance();
469	$this->db->setParam(array(
470	'db_server' => $this->getParam('db_server'),
471	'db_name' => $this->getParam('db_name'),
472	'db_user' => $this->getParam('db_user'),
473	'db_pass' => $this->getParam('db_pass'),
474	'db_always_debug' => $this->getParam('db_always_debug'),
475	'db_debug' => $this->getParam('db_debug'),
476	'db_die_on_failure' => $this->getParam('db_die_on_failure'),
477	'timezone' => $this->getParam('db_timezone'),
478	'character_set' => $this->getParam('db_character_set'),
479	'collation' => $this->getParam('db_collation'),
480	));
481	$this->db->connect();
482	}
483	}
484
485
486	/**
487	* 2. Start PHP session.
488	*/
489
490	// Use sessions if enabled and not a CLI script.
491	if (true === $this->getParam('enable_session') && !$this->cli) {
492
493	// Session parameters.
494	// https://www.php.net/manual/en/session.security.ini.php
495	ini_set('session.cookie_httponly', true);
496	ini_set('session.cookie_secure', getenv('HTTPS') == 'on');
497	ini_set('session.cookie_samesite', 'Strict'); // Only PHP >= 7.3
498	// TODO: Reliance on gc_maxlifetime is not recommended. Developers should manage the lifetime of sessions with a timestamp by themselves.
499	ini_set('session.cookie_lifetime', 604800); // 7 days.
500	ini_set('session.gc_maxlifetime', 604800); // 7 days.
501	ini_set('session.gc_divisor', 1000);
502	ini_set('session.gc_probability', 1);
503	ini_set('session.use_cookies', $this->getParam('session_use_cookies'));
504	ini_set('session.use_only_cookies', true);
505	ini_set('session.use_trans_sid', false);
506	ini_set('session.use_strict_mode', true);
507	ini_set('session.entropy_file', '/dev/urandom');
508	ini_set('session.entropy_length', '512');
509	ini_set('session.sid_length', '48'); // Only PHP >= 7.1
510	ini_set('session.cache_limiter', 'nocache');
511	if ('' != $this->getParam('session_dir') && is_dir($this->getParam('session_dir'))) {
512	ini_set('session.save_path', $this->getParam('session_dir'));
513	}
514	session_name($this->getParam('session_name'));
515
516	if (true === $this->getParam('enable_db_session_handler') && true === $this->getParam('enable_db')) {
517	// Database session handling.
518	require_once dirname(__FILE__) . '/DBSessionHandler.inc.php';
519	$this->db_session = new DBSessionHandler($this->db, array(
520	'db_table' => 'session_tbl',
521	'create_table' => $this->getParam('db_create_tables'),
522	));
523	}
524
525	// Start the session.
526	session_start();
527
528	if (!isset($_SESSION['_app'][$this->_ns])) {
529	// Access session data using: $_SESSION['...'].
530	// Initialize here _after_ session has started.
531	$_SESSION['_app'][$this->_ns] = array(
532	'messages' => array(),
533	'boomerang' => array(),
534	);
535	}
536	}
537
538
539	/**
540	* 3. Misc setup.
541	*/
542
543	// To get a safe hostname, remove port and invalid hostname characters.
544	$safe_http_host = preg_replace('/[^a-z\d.:-]/' . $this->getParam('preg_u'), '', strtok(getenv('HTTP_HOST'), ':')); // FIXME: strtok shouldn't be used if there is a chance HTTP_HOST may be empty except for the port, e.g., `:80` will return `80`
545	// If strtok() matched a ':' in the previous line, the rest of the string contains the port number (or FALSE)
546	$safe_http_port = preg_replace('/[^0-9]/' . $this->getParam('preg_u'), '', strtok(''));
547	if ('' != $safe_http_host && '' == $this->getParam('site_hostname')) {
548	$this->setParam(array('site_hostname' => $safe_http_host));
549	}
550	if ('' != $safe_http_port && '' == $this->getParam('site_port')) {
551	$this->setParam(array('site_port' => $safe_http_port));
552	}
553
554	// Site URL will become something like http://host.name.tld (no ending slash)
555	// and is used whenever a URL need be used to the current site.
556	// Not available on CLI scripts obviously.
557	if ('' != $safe_http_host && '' == $this->getParam('site_url')) {
558	$this->setParam(array('site_url' => sprintf('%s://%s%s', (getenv('HTTPS') ? 'https' : 'http'), $safe_http_host, (preg_match('/^(\|80\|443)$/', $safe_http_port) ? '' : ':' . $safe_http_port))));
559	}
560
561	// Page URL will become a permalink to the current page.
562	// Also not available on CLI scripts obviously.
563	if ('' != $safe_http_host) {
564	$this->setParam(array('page_url' => sprintf('%s%s', $this->getParam('site_url'), getenv('REQUEST_URI'))));
565	}
566
567	// In case site_email isn't set, use something halfway presentable.
568	if ('' != $safe_http_host && '' == $this->getParam('site_email')) {
569	$this->setParam(array('site_email' => sprintf('no-reply@%s', $safe_http_host)));
570	}
571
572	// A key for calculating simple cryptographic signatures.
573	if (isset($_SERVER['SIGNING_KEY'])) {
574	$this->setParam(array('signing_key' => $_SERVER['SIGNING_KEY']));
575	}
576
577	// Character set. This should also be printed in the html header template.
578	if (!$this->cli) {
579	if (!headers_sent($h_file, $h_line)) {
580	header(sprintf('Content-type: %s; charset=%s', $this->getParam('content_type'), $this->getParam('character_set')));
581	} else {
582	$this->logMsg(sprintf('Unable to set Content-type; headers already sent (output started in %s : %s)', $h_file, $h_line), LOG_DEBUG, __FILE__, __LINE__);
583	}
584	}
585
586	// Cache control headers.
587	if (!$this->cli && false !== $this->getParam('http_cache_headers')) {
588	if (!headers_sent($h_file, $h_line)) {
589	if ($this->getParam('http_cache_headers') > 0) {
590	// Allow HTTP caching, for this many seconds.
591	header(sprintf('Cache-Control: no-transform, public, max-age=%d', $this->getParam('http_cache_headers')));
592	header('Vary: Accept-Encoding');
593	} else {
594	// Disallow HTTP caching entirely. http://stackoverflow.com/a/2068407
595	header('Cache-Control: no-cache, no-store, must-revalidate'); // HTTP 1.1.
596	header('Pragma: no-cache'); // HTTP 1.0.
597	header('Expires: 0'); // Proxies.
598	}
599	} else {
600	$this->logMsg(sprintf('Unable to set Cache-Control; headers already sent (output started in %s : %s)', $h_file, $h_line), LOG_DEBUG, __FILE__, __LINE__);
601	}
602	}
603
604	// Set the version of the codebase we're using.
605	$codebase_version_file = dirname(__FILE__) . '/../docs/version.txt';
606	$codebase_version = '';
607	if (is_readable($codebase_version_file) && !is_dir($codebase_version_file)) {
608	$codebase_version = trim(file_get_contents($codebase_version_file));
609	$this->setParam(array('codebase_version' => $codebase_version));
610	if (!$this->cli && $this->getParam('codebase_version')) {
611	if (!headers_sent($h_file, $h_line)) {
612	header(sprintf('X-Codebase-Version: %s', $this->getParam('codebase_version')));
613	} else {
614	$this->logMsg(sprintf('Unable to set X-Codebase-Version; headers already sent (output started in %s : %s)', $h_file, $h_line), LOG_DEBUG, __FILE__, __LINE__);
615	}
616	}
617	}
618
619	if (version_compare(PHP_VERSION, self::CODEBASE_MIN_PHP_VERSION, '<')) {
620	$this->logMsg(sprintf('PHP %s required for Codebase %s, using %s; some things will break.', self::CODEBASE_MIN_PHP_VERSION, $codebase_version, PHP_VERSION), LOG_NOTICE, __FILE__, __LINE__);
621	}
622
623	// Set the application version if defined.
624	if (false !== $site_version_file = stream_resolve_include_path($this->getParam('site_version_file'))) {
625	if (mb_strpos($site_version_file, '.json') !== false) {
626	$version_json = json_decode(trim(file_get_contents($site_version_file)), true);
627	$site_version = isset($version_json['version']) ? $version_json['version'] : null;
628	} else {
629	$site_version = trim(file_get_contents($site_version_file));
630	}
631	$this->setParam(array('site_version' => $site_version));
632	}
633	if (!$this->cli && $this->getParam('site_version')) {
634	if (!headers_sent($h_file, $h_line)) {
635	header(sprintf('X-Site-Version: %s', $this->getParam('site_version')));
636	} else {
637	$this->logMsg(sprintf('Unable to set X-Site-Version; headers already sent (output started in %s : %s)', $h_file, $h_line), LOG_DEBUG, __FILE__, __LINE__);
638	}
639	}
640
641	// Unset environment variables we're done with.
642	unset($_SERVER['DB_SERVER'], $_SERVER['DB_NAME'], $_SERVER['DB_USER'], $_SERVER['DB_PASS'], $_SERVER['SIGNING_KEY']);
643
644	$this->running = true;
645	return true;
646	}
647
648	/**
649	* Stop running this application.
650	*
651	* @access public
652	* @author Quinn Comendant <quinn@strangecode.com>
653	* @since 17 Jul 2005 17:20:18
654	*/
655	public function stop()
656	{
657	session_write_close();
658	$this->running = false;
659	$num_queries = 0;
660	if ($this->db instanceof \DB && true === $this->getParam('enable_db')) {
661	$num_queries += $this->db->numQueries();
662	if ($num_queries > 0 && true === $this->getParam('enable_db_pdo')) {
663	// If the app wants to use PDO, warn if any legacy db queries are made.
664	$this->logMsg(sprintf('%s queries using legacy DB functions', $num_queries), LOG_WARNING, __FILE__, __LINE__);
665	}
666	$this->db->close();
667	}
668	if ($this->pdo instanceof \Strangecode\Codebase\PDO && (true === $this->getParam('enable_db') \|\| true === $this->getParam('enable_db_pdo'))) {
669	$num_queries += $this->pdo->numQueries();
670	$this->pdo->close();
671	}
672	$mem_current = memory_get_usage();
673	$mem_peak = memory_get_peak_usage();
674	$this->timer->stop('_app');
675	$this->logMsg(sprintf('Script ended gracefully. Execution time: %s. Number of db queries: %s. Memory usage: %s. Peak memory: %s.', $this->timer->getTime('_app'), $num_queries, $mem_current, $mem_peak), LOG_DEBUG, __FILE__, __LINE__);
676	}
677
678	/*
679	* @access public
680	* @return bool True if running in the context of a CLI script.
681	* @author Quinn Comendant <quinn@strangecode.com>
682	* @since 10 Feb 2019 12:31:59
683	*/
684	public function isCLI()
685	{
686	return $this->cli;
687	}
688
689	/**
690	* Add a message to the session, which is printed in the header.
691	* Just a simple way to print messages to the user.
692	*
693	* @access public
694	*
695	* @param string $message The text description of the message.
696	* @param int $type The type of message: MSG_NOTICE,
697	* MSG_SUCCESS, MSG_WARNING, or MSG_ERR.
698	* @param string $file __FILE__.
699	* @param string $line __LINE__.
700	*/
701	public function raiseMsg($message, $type=MSG_NOTICE, $file=null, $line=null)
702	{
703	$message = trim($message);
704
705	if (!$this->running) {
706	$this->logMsg(sprintf('Canceled %s, application not running.', __METHOD__), LOG_NOTICE, __FILE__, __LINE__);
707	return false;
708	}
709
710	if (!$this->getParam('enable_session')) {
711	$this->logMsg(sprintf('Canceled %s, session not enabled.', __METHOD__), LOG_NOTICE, __FILE__, __LINE__);
712	return false;
713	}
714
715	if ('' == trim($message)) {
716	$this->logMsg(sprintf('Raised message is an empty string.', null), LOG_NOTICE, __FILE__, __LINE__);
717	return false;
718	}
719
720	// Avoid duplicate full-stops..
721	$message = trim(preg_replace('/\.{2}$/', '.', $message));
722
723	// Save message in session under unique key to avoid duplicate messages.
724	$msg_id = md5($type . $message);
725	if (!isset($_SESSION['_app'][$this->_ns]['messages'][$msg_id])) {
726	$_SESSION['_app'][$this->_ns]['messages'][$msg_id] = array(
727	'type' => $type,
728	'message' => $message,
729	'file' => $file,
730	'line' => $line,
731	'count' => (isset($_SESSION['_app'][$this->_ns]['messages'][$msg_id]['count']) ? (1 + $_SESSION['_app'][$this->_ns]['messages'][$msg_id]['count']) : 1)
732	);
733	}
734
735	if (!in_array($type, array(MSG_NOTICE, MSG_SUCCESS, MSG_WARNING, MSG_ERR))) {
736	$this->logMsg(sprintf('Invalid MSG_* type: %s', $type), LOG_NOTICE, __FILE__, __LINE__);
737	}
738
739	// Increment the counter for this message type.
740	$this->_raised_msg_counter[$type] += 1;
741	}
742
743	/*
744	* Returns the number of raised message (all, or by type) for the current script execution (this number may not match the total number of messages stored in session for multiple script executions)
745	*
746	* @access public
747	* @param
748	* @return
749	* @author Quinn Comendant <quinn@strangecode.com>
750	* @version 1.0
751	* @since 30 Apr 2015 17:13:03
752	*/
753	public function getRaisedMessageCount($type='all')
754	{
755	if ('all' == $type) {
756	return array_sum($this->_raised_msg_counter);
757	} else if (isset($this->_raised_msg_counter[$type])) {
758	return $this->_raised_msg_counter[$type];
759	} else {
760	$this->logMsg(sprintf('Cannot return count of unknown raised message type: %s', $type), LOG_WARNING, __FILE__, __LINE__);
761	return false;
762	}
763	}
764
765	/**
766	* Returns an array of the raised messages.
767	*
768	* @access public
769	* @return array List of messages in FIFO order.
770	* @author Quinn Comendant <quinn@strangecode.com>
771	* @since 21 Dec 2005 13:09:20
772	*/
773	public function getRaisedMessages()
774	{
775	if (!$this->running) {
776	$this->logMsg(sprintf('Canceled %s, application not running.', __METHOD__), LOG_NOTICE, __FILE__, __LINE__);
777	return false;
778	}
779	return isset($_SESSION['_app'][$this->_ns]['messages']) ? $_SESSION['_app'][$this->_ns]['messages'] : array();
780	}
781
782	/**
783	* Resets the message list.
784	*
785	* @access public
786	* @author Quinn Comendant <quinn@strangecode.com>
787	* @since 21 Dec 2005 13:21:54
788	*/
789	public function clearRaisedMessages()
790	{
791	if (!$this->running) {
792	$this->logMsg(sprintf('Canceled %s, application not running.', __METHOD__), LOG_NOTICE, __FILE__, __LINE__);
793	return false;
794	}
795
796	$_SESSION['_app'][$this->_ns]['messages'] = array();
797	}
798
799	/**
800	* Prints the HTML for displaying raised messages.
801	*
802	* @param string $above Additional message to print above error messages (e.g. "Oops!").
803	* @param string $below Additional message to print below error messages (e.g. "Please fix and resubmit").
804	* @param string $print_gotohash_js Print a line of javascript that scrolls the browser window down to view any error messages.
805	* @param string $hash The #hashtag to scroll to.
806	* @access public
807	* @author Quinn Comendant <quinn@strangecode.com>
808	* @since 15 Jul 2005 01:39:14
809	*/
810	public function printRaisedMessages($above='', $below='', $print_gotohash_js=false, $hash='sc-msg')
811	{
812
813	if (!$this->running) {
814	$this->logMsg(sprintf('Canceled %s, application not running.', __METHOD__), LOG_NOTICE, __FILE__, __LINE__);
815	return false;
816	}
817
818	$messages = $this->getRaisedMessages();
819	if (!empty($messages)) {
820	?><div id="sc-msg" class="sc-msg"><?php
821	if ('' != $above) {
822	?><div class="sc-above"><?php echo oTxt($above); ?></div><?php
823	}
824	foreach ($messages as $m) {
825	if (error_reporting() > 0 && $this->getParam('display_errors') && isset($m['file']) && isset($m['line'])) {
826	echo "\n<!-- [" . $m['file'] . ' : ' . $m['line'] . '] -->';
827	}
828	switch ($m['type']) {
829	case MSG_ERR:
830	echo '<div data-alert data-closable class="sc-msg-error alert-box callout alert">' . $m['message'] . '<a class="close close-button" aria-label="Dismiss alert" data-close><span aria-hidden="true">×</span></a></div>';
831	break;
832
833	case MSG_WARNING:
834	echo '<div data-alert data-closable class="sc-msg-warning alert-box callout warning">' . $m['message'] . '<a class="close close-button" aria-label="Dismiss alert" data-close><span aria-hidden="true">×</span></a></div>';
835	break;
836
837	case MSG_SUCCESS:
838	echo '<div data-alert data-closable class="sc-msg-success alert-box callout success">' . $m['message'] . '<a class="close close-button" aria-label="Dismiss alert" data-close><span aria-hidden="true">×</span></a></div>';
839	break;
840
841	case MSG_NOTICE:
842	default:
843	echo '<div data-alert data-closable class="sc-msg-notice alert-box callout primary info">' . $m['message'] . '<a class="close close-button" aria-label="Dismiss alert" data-close><span aria-hidden="true">×</span></a></div>';
844	break;
845	}
846	}
847	if ('' != $below) {
848	?><div class="sc-below"><?php echo oTxt($below); ?></div><?php
849	}
850	?></div><?php
851	if ($print_gotohash_js) {
852	?>
853	<script type="text/javascript">
854	/* <![CDATA[ */
855	window.location.hash = '#<?php echo urlencode($hash); ?>';
856	/* ]]> */
857	</script>
858	<?php
859	}
860	}
861	$this->clearRaisedMessages();
862	}
863
864	/**
865	* Logs messages to defined channels: file, email, sms, and screen. Repeated messages are
866	* not repeated but printed once with count. Log events that match a sendable channel (email or SMS)
867	* are sent once per 'log_multiple_timeout' setting (to avoid a flood of error emails).
868	*
869	* @access public
870	* @param string $message The text description of the message.
871	* @param int $priority The type of message priority (in descending order):
872	* LOG_EMERG 0 system is unusable
873	* LOG_ALERT 1 action must be taken immediately
874	* LOG_CRIT 2 critical conditions
875	* LOG_ERR 3 error conditions
876	* LOG_WARNING 4 warning conditions
877	* LOG_NOTICE 5 normal, but significant, condition
878	* LOG_INFO 6 informational message
879	* LOG_DEBUG 7 debug-level message
880	* @param string $file The file where the log event occurs.
881	* @param string $line The line of the file where the log event occurs.
882	* @param string $url The URL where the log event occurs ($_SERVER['REQUEST_URI'] will be used if left null).
883	*/
884	public function logMsg($message, $priority=LOG_INFO, $file=null, $line=null, $url=null)
885	{
886	static $previous_events = array();
887
888	// If priority is not specified, assume the worst.
889	if (!$this->logPriorityToString($priority)) {
890	$this->logMsg(sprintf('Log priority %s not defined. (Message: %s)', $priority, $message), LOG_EMERG, $file, $line);
891	$priority = LOG_EMERG;
892	}
893
894	// In case __FILE__ and __LINE__ are not provided, note that fact.
895	$file = '' == $file ? 'unknown-file' : $file;
896	$line = '' == $line ? 'unknown-line' : $line;
897
898	// Get the URL, or used the provided value.
899	if (!isset($url)) {
900	$url = isset($_SERVER['REQUEST_URI']) ? mb_substr($_SERVER['REQUEST_URI'], 0, $this->getParam('log_message_max_length')) : '';
901	}
902
903	// If log file is not specified, don't log to a file.
904	if (!$this->getParam('log_directory') \|\| !$this->getParam('log_filename') \|\| !is_dir($this->getParam('log_directory')) \|\| !is_writable($this->getParam('log_directory'))) {
905	$this->setParam(array('log_file_priority' => false));
906	// We must use trigger_error to report this problem rather than calling $app->logMsg, which might lead to an infinite loop.
907	trigger_error(sprintf('Codebase error: log directory (%s) not found or writable.', $this->getParam('log_directory')), E_USER_NOTICE);
908	}
909
910	// Before we get any further, let's see if ANY log events are configured to be reported.
911	if ((false === $this->getParam('log_file_priority') \|\| $priority > $this->getParam('log_file_priority'))
912	&& (false === $this->getParam('log_email_priority') \|\| $priority > $this->getParam('log_email_priority'))
913	&& (false === $this->getParam('log_sms_priority') \|\| $priority > $this->getParam('log_sms_priority'))
914	&& (false === $this->getParam('log_screen_priority') \|\| $priority > $this->getParam('log_screen_priority'))) {
915	// This event would not be recorded, skip it entirely.
916	return false;
917	}
918
919	if ($this->getParam('log_serialize')) {
920	// Serialize multi-line messages.
921	$message = preg_replace('/\s+/m', ' ', trim($message));
922	}
923
924	// Store this event under a unique key, counting each time it occurs so that it only gets reported a limited number of times.
925	$msg_id = md5($message . $priority . $file . $line);
926	if ($this->getParam('log_ignore_repeated_events') && isset($previous_events[$msg_id])) {
927	$previous_events[$msg_id]++;
928	if ($previous_events[$msg_id] == 2) {
929	$this->logMsg(sprintf('%s (Event repeated %s or more times)', $message, $previous_events[$msg_id]), $priority, $file, $line);
930	}
931	return false;
932	} else {
933	$previous_events[$msg_id] = 1;
934	}
935
936	// For email and SMS notification types use "lock" files to prevent sending email and SMS notices ad infinitum.
937	if ((false !== $this->getParam('log_email_priority') && $priority <= $this->getParam('log_email_priority'))
938	\|\| (false !== $this->getParam('log_sms_priority') && $priority <= $this->getParam('log_sms_priority'))) {
939	// This event will generate a "send" notification. Prepare lock file.
940	$site_hash = md5(empty($_SERVER['SERVER_NAME']) ? $_SERVER['SCRIPT_FILENAME'] : $_SERVER['SERVER_NAME']);
941	$lock_dir = $this->getParam('tmp_dir') . "/codebase_msgs_$site_hash/";
942	// Just use the file and line for the msg_id to limit the number of possible messages
943	// (the message string itself shan't be used as it may contain innumerable combinations).
944	$lock_file = $lock_dir . md5($file . ':' . $line);
945	if (!is_dir($lock_dir)) {
946	mkdir($lock_dir);
947	}
948	$send_notifications = true;
949	if (is_file($lock_file)) {
950	$msg_last_sent = filectime($lock_file);
951	// Has this message been sent more recently than the timeout?
952	if ((time() - $msg_last_sent) <= $this->getParam('log_multiple_timeout')) {
953	// This message was already sent recently.
954	$send_notifications = false;
955	} else {
956	// Timeout has expired; send notifications again and reset timeout.
957	touch($lock_file);
958	}
959	} else {
960	touch($lock_file);
961	}
962	}
963
964	// Make sure to log in the system's locale.
965	$locale = setlocale(LC_TIME, 0);
966	setlocale(LC_TIME, 'C');
967
968	// Data to be stored for a log event.
969	$event = array(
970	'date' => date('Y-m-d H:i:s'),
971	'remote ip' => getRemoteAddr(),
972	'pid' => getmypid(),
973	'type' => $this->logPriorityToString($priority),
974	'file:line' => "$file : $line",
975	'url' => $url,
976	'message' => mb_substr($message, 0, $this->getParam('log_message_max_length')),
977	);
978	// Here's a shortened version of event data.
979	$event_short = $event;
980	$event_short['url'] = truncate($event_short['url'], 120);
981
982	// Email info.
983	$hostname = ('' != $this->getParam('site_hostname')) ? $this->getParam('site_hostname') : php_uname('n');
984	$hostname = preg_replace('/^ww+\./', '', $hostname);
985	$headers = sprintf("From: %s\nX-File: %s\nX-Line: %s", $this->getParam('site_email'), $file, $line);
986
987	// FILE ACTION
988	if (false !== $this->getParam('log_file_priority') && $priority <= $this->getParam('log_file_priority')) {
989	$event_str = '[' . join('] [', $event_short) . ']';
990	error_log("$event_str\n", 3, $this->getParam('log_directory') . '/' . $this->getParam('log_filename'));
991	}
992
993	// EMAIL ACTION
994	if (false !== $this->getParam('log_email_priority') && $priority <= $this->getParam('log_email_priority') && '' != $this->getParam('log_to_email_address') && $send_notifications) {
995	$subject = sprintf('[%s %s] %s', $hostname, $event['type'], mb_substr($event['message'], 0, 64));
996	$email_msg = sprintf("A log event of type '%s' occurred on %s\n\n", $event['type'], $hostname);
997	foreach ($event as $k=>$v) {
998	$email_msg .= sprintf("%-16s %s\n", $k, $v);
999	}
1000	$email_msg .= sprintf("%-16s %s\n", 'codebase version', $this->getParam('codebase_version'));
1001	$email_msg .= sprintf("%-16s %s\n", 'site version', $this->getParam('site_version'));
1002	mb_send_mail($this->getParam('log_to_email_address'), $subject, $email_msg, $headers);
1003	}
1004
1005	// SMS ACTION
1006	if (false !== $this->getParam('log_sms_priority') && $priority <= $this->getParam('log_sms_priority') && '' != $this->getParam('log_to_sms_address') && $send_notifications) {
1007	$subject = sprintf('[%s %s]', $hostname, $this->logPriorityToString($priority));
1008	$sms_msg = sprintf('%s [%s:%s]', mb_substr($event_short['message'], 0, 64), basename($file), $line);
1009	mb_send_mail($this->getParam('log_to_sms_address'), $subject, $sms_msg, $headers);
1010	}
1011
1012	// SCREEN ACTION
1013	if (false !== $this->getParam('log_screen_priority') && $priority <= $this->getParam('log_screen_priority')) {
1014	file_put_contents('php://stderr', "[{$event['type']}] [{$event['message']}]\n", FILE_APPEND);
1015	}
1016
1017	// Restore original locale.
1018	setlocale(LC_TIME, $locale);
1019
1020	return true;
1021	}
1022
1023	/**
1024	* Returns the string representation of a LOG_* integer constant.
1025	* Updated: also returns the LOG_* integer constant if passed a string log value ('info' returns 6).
1026	*
1027	* @param int $priority The LOG_* integer constant (to return the string name), or a string name of a log priority to return the integer LOG_* value..
1028	*
1029	* @return The string representation of $priority (if integer given), or integer representation (if string given).
1030	*/
1031	public function logPriorityToString($priority) {
1032	$priorities = array(
1033	LOG_EMERG => 'emergency',
1034	LOG_ALERT => 'alert',
1035	LOG_CRIT => 'critical',
1036	LOG_ERR => 'error',
1037	LOG_WARNING => 'warning',
1038	LOG_NOTICE => 'notice',
1039	LOG_INFO => 'info',
1040	LOG_DEBUG => 'debug'
1041	);
1042	if (isset($priorities[$priority])) {
1043	return $priorities[$priority];
1044	} else if (is_string($priority) && false !== ($key = array_search($priority, $priorities))) {
1045	return $key;
1046	} else {
1047	return false;
1048	}
1049	}
1050
1051	/**
1052	* Forcefully set a query argument even if one currently exists in the request.
1053	* Values in the _carry_queries array will be copied to URLs (via $app->url()) and
1054	* to hidden input values (via printHiddenSession()).
1055	*
1056	* @access public
1057	* @param mixed $query_key The key (or keys, as an array) of the query argument to save.
1058	* @param mixed $val The new value of the argument key.
1059	* @author Quinn Comendant <quinn@strangecode.com>
1060	* @since 13 Oct 2007 11:34:51
1061	*/
1062	public function setQuery($query_key, $val)
1063	{
1064	if (!is_array($query_key)) {
1065	$query_key = array($query_key);
1066	}
1067	foreach ($query_key as $k) {
1068	// Set the value of the specified query argument into the _carry_queries array.
1069	$this->_carry_queries[$k] = $val;
1070	}
1071	}
1072
1073	/**
1074	* Specify which query arguments will be carried persistently between requests.
1075	* Values in the _carry_queries array will be copied to URLs (via $app->url()) and
1076	* to hidden input values (via printHiddenSession()).
1077	*
1078	* @access public
1079	* @param mixed $query_key The key (or keys, as an array) of the query argument to save.
1080	* @param mixed $default If the key is not available, set to this default value.
1081	* @author Quinn Comendant <quinn@strangecode.com>
1082	* @since 14 Nov 2005 19:24:52
1083	*/
1084	public function carryQuery($query_key, $default=false)
1085	{
1086	if (!is_array($query_key)) {
1087	$query_key = array($query_key);
1088	}
1089	foreach ($query_key as $k) {
1090	// If not already set, and there is a non-empty value provided in the request...
1091	if (isset($k) && '' != $k && !isset($this->_carry_queries[$k]) && false !== getFormData($k, $default)) {
1092	// Copy the value of the specified query argument into the _carry_queries array.
1093	$this->_carry_queries[$k] = getFormData($k, $default);
1094	$this->logMsg(sprintf('Carrying query: %s => %s', $k, truncate(getDump($this->_carry_queries[$k], true), 128, 'end')), LOG_DEBUG, __FILE__, __LINE__);
1095	}
1096	}
1097	}
1098
1099	/**
1100	* dropQuery() is the opposite of carryQuery(). The specified value will not appear in
1101	* url()/ohref()/printHiddenSession() modified URLs unless explicitly written in.
1102	*
1103	* @access public
1104	* @param mixed $query_key The key (or keys, as an array) of the query argument to remove.
1105	* @param bool $unset Remove any values set in the request matching the given $query_key.
1106	* @author Quinn Comendant <quinn@strangecode.com>
1107	* @since 18 Jun 2007 20:57:29
1108	*/
1109	public function dropQuery($query_key, $unset=false)
1110	{
1111	if (!is_array($query_key)) {
1112	$query_key = array($query_key);
1113	}
1114	foreach ($query_key as $k) {
1115	if (array_key_exists($k, $this->_carry_queries)) {
1116	// Remove the value of the specified query argument from the _carry_queries array.
1117	$this->logMsg(sprintf('Dropping carried query: %s => %s', $k, $this->_carry_queries[$k]), LOG_DEBUG, __FILE__, __LINE__);
1118	unset($this->_carry_queries[$k]);
1119	}
1120	if ($unset && (isset($_REQUEST) && array_key_exists($k, $_REQUEST))) {
1121	unset($_REQUEST[$k], $_GET[$k], $_POST[$k], $_COOKIE[$k]);
1122	}
1123	}
1124	}
1125
1126	/**
1127	* Outputs a fully qualified URL with a query of all the used (ie: not empty)
1128	* keys and values, including optional queries. This allows mindless retention
1129	* of query arguments across page requests. If cookies are not
1130	* used and session_use_trans_sid=true the session id will be propagated in the URL.
1131	*
1132	* @param string $url The initial url
1133	* @param mixed $carry_args Additional url arguments to carry in the query,
1134	* or FALSE to prevent carrying queries. Can be any of the following formats:
1135	* array('key1', key2', key3') <-- to save these keys if in the form data.
1136	* array('key1'=>'value', key2'='value') <-- to set keys to default values if not present in form data.
1137	* false <-- To not carry any queries. If URL already has queries those will be retained.
1138	*
1139	* @param mixed $always_include_sid Always add the session id, even if using_trans_sid = true. This is required when
1140	* URL starts with http, since PHP using_trans_sid doesn't do those and also for
1141	* header('Location...') redirections.
1142	*
1143	* @param bool $include_csrf_token Set to true to include the csrf_token in the form. Only use this for forms with action="post" to prevent the token from being revealed in the URL.
1144	* @return string url with attached queries and, if not using cookies, the session id
1145	*/
1146	public function url($url='', $carry_args=null, $always_include_sid=false, $include_csrf_token=false)
1147	{
1148	if (!$this->running) {
1149	$this->logMsg(sprintf('Canceled %s, application not running.', __METHOD__), LOG_NOTICE, __FILE__, __LINE__);
1150	return false;
1151	}
1152
1153	if ($this->getParam('csrf_token_enabled') && $include_csrf_token) {
1154	// Include the csrf_token as a carried query argument.
1155	// This token can be validated upon form submission with $app->verifyCSRFToken() or $app->requireValidCSRFToken()
1156	$carry_args = is_array($carry_args) ? $carry_args : array();
1157	$carry_args = array_merge($carry_args, array($this->getParam('csrf_token_name') => $this->getCSRFToken()));
1158	}
1159
1160	// Get any provided query arguments to include in the final URL.
1161	// If FALSE is a provided here, DO NOT carry the queries.
1162	$do_carry_queries = true;
1163	$one_time_carry_queries = array();
1164	if (!is_null($carry_args)) {
1165	if (is_array($carry_args)) {
1166	if (!empty($carry_args)) {
1167	foreach ($carry_args as $key=>$arg) {
1168	// Get query from appropriate source.
1169	if (false === $arg) {
1170	$do_carry_queries = false;
1171	} else if (false !== getFormData($arg, false)) {
1172	$one_time_carry_queries[$arg] = getFormData($arg); // Set arg to form data if available.
1173	} else if (!is_numeric($key) && '' != $arg) {
1174	$one_time_carry_queries[$key] = getFormData($key, $arg); // Set to arg to default if specified (overwritten by form data).
1175	}
1176	}
1177	}
1178	} else if (false !== getFormData($carry_args, false)) {
1179	$one_time_carry_queries[$carry_args] = getFormData($carry_args);
1180	} else if (false === $carry_args) {
1181	$do_carry_queries = false;
1182	}
1183	}
1184
1185	// If the URL is empty, use REQUEST_URI stripped of its query string.
1186	if ('' == $url) {
1187	$url = (strstr(getenv('REQUEST_URI'), '?', true) ?: getenv('REQUEST_URI')); // strstr() returns false if '?' is not found, so use a shorthand ternary operator.
1188	}
1189
1190	// Get the first delimiter that is needed in the url.
1191	$delim = mb_strpos($url, '?') !== false ? ini_get('arg_separator.output') : '?';
1192
1193	$q = '';
1194	if ($do_carry_queries) {
1195	// Join the global _carry_queries and local one_time_carry_queries.
1196	$query_args = urlEncodeArray(array_merge($this->_carry_queries, $one_time_carry_queries));
1197	foreach ($query_args as $key=>$val) {
1198
1199	// Avoid indexed-array query params because in a URL array param keys should all match.
1200	// I.e, we want to use `array[]=A&array[]=B` instead of `array[0]=A&array[1]=B`.
1201	// This is disabled because sometimes we need to retain a numeric array key, e.g., ?metadata_id[54]=on. Can't remember where having indexed-array queries was a problem, hopefully this was only added as an aesthetic feature?
1202	// $key = preg_replace('/\[\d+\]$/' . $this->getParam('preg_u'), '[]', $key);
1203
1204	// Check value is set and value does not already exist in the url.
1205	if (!preg_match('/[?&]' . preg_quote($key) . '=/', $url)) {
1206	$q .= $delim . $key . '=' . $val;
1207	$delim = ini_get('arg_separator.output');
1208	}
1209	}
1210	}
1211
1212	// Pop off any named anchors to push them back on after appending additional query args.
1213	$parts = explode('#', $url, 2);
1214	$url = $parts[0];
1215	$anchor = isset($parts[1]) ? $parts[1] : '';
1216
1217	// Include the necessary SID if the following is true:
1218	// - no cookie in http request OR cookies disabled in App
1219	// - sessions are enabled
1220	// - the link stays on our site
1221	// - transparent SID propagation with session.use_trans_sid is not being used OR url begins with protocol (using_trans_sid has no effect here)
1222	// OR
1223	// - we must include the SID because we say so (it's used in a context where cookies will not be effective, ie. moving from http to https)
1224	// AND
1225	// - the SID is not already in the query.
1226	if (
1227	(
1228	(
1229	(
1230	!isset($_COOKIE[session_name()])
1231	\|\| !$this->getParam('session_use_cookies')
1232	)
1233	&& $this->getParam('session_use_trans_sid')
1234	&& $this->getParam('enable_session')
1235	&& isMyDomain($url)
1236	&& (
1237	!ini_get('session.use_trans_sid')
1238	\|\| preg_match('!^(http\|https)://!i', $url)
1239	)
1240	)
1241	\|\| $always_include_sid
1242	)
1243	&& !preg_match('/[?&]' . preg_quote(session_name()) . '=/', $url)
1244	) {
1245	$url = sprintf('%s%s%s%s=%s%s', $url, $q, $delim, session_name(), session_id(), ('' == $anchor ? '' : "#$anchor"));
1246	} else {
1247	$url = sprintf('%s%s%s', $url, $q, ('' == $anchor ? '' : "#$anchor"));
1248	}
1249
1250	if ('' == $url) {
1251	$this->logMsg(sprintf('Generated empty URL. Args: %s', getDump(func_get_args())), LOG_NOTICE, __FILE__, __LINE__);
1252	}
1253
1254	return $url;
1255	}
1256
1257	/**
1258	* Returns a HTML-friendly URL processed with $app->url and & replaced with &
1259	*
1260	* @access public
1261	* @param (see param reference for url() method)
1262	* @return string URL passed through $app->url() with ampersands transformed to $amp;
1263	* @author Quinn Comendant <quinn@strangecode.com>
1264	* @since 09 Dec 2005 17:58:45
1265	*/
1266	public function oHREF($url='', $carry_args=null, $always_include_sid=false, $include_csrf_token=false)
1267	{
1268	// Process the URL.
1269	$url = $this->url($url, $carry_args, $always_include_sid, $include_csrf_token);
1270
1271	// Replace any & not followed by an html or unicode entity with its & equivalent.
1272	$url = preg_replace('/&(?![\w\d#]{1,10};)/' . $this->getParam('preg_u'), '&', $url);
1273
1274	return $url;
1275	}
1276
1277	/*
1278	* Returns a string containing <input type="hidden" > for session, carried queries, and CSRF token.
1279	*
1280	* @access public
1281	* @param (see printHiddenSession)
1282	* @return string
1283	* @author Quinn Comendant <quinn@strangecode.com>
1284	* @since 25 May 2019 15:01:40
1285	*/
1286	public function getHiddenSession($carry_args=null, $include_csrf_token=false)
1287	{
1288	if (!$this->running) {
1289	$this->logMsg(sprintf('Canceled %s, application not running.', __METHOD__), LOG_NOTICE, __FILE__, __LINE__);
1290	return false;
1291	}
1292
1293	$out = '';
1294
1295	// Get any provided query arguments to include in the final hidden form data.
1296	// If FALSE is a provided here, DO NOT carry the queries.
1297	$do_carry_queries = true;
1298	$one_time_carry_queries = array();
1299	if (!is_null($carry_args)) {
1300	if (is_array($carry_args)) {
1301	if (!empty($carry_args)) {
1302	foreach ($carry_args as $key=>$arg) {
1303	// Get query from appropriate source.
1304	if (false === $arg) {
1305	$do_carry_queries = false;
1306	} else if (false !== getFormData($arg, false)) {
1307	$one_time_carry_queries[$arg] = getFormData($arg); // Set arg to form data if available.
1308	} else if (!is_numeric($key) && '' != $arg) {
1309	$one_time_carry_queries[$key] = getFormData($key, $arg); // Set to arg to default if specified (overwritten by form data).
1310	}
1311	}
1312	}
1313	} else if (false !== getFormData($carry_args, false)) {
1314	$one_time_carry_queries[$carry_args] = getFormData($carry_args);
1315	} else if (false === $carry_args) {
1316	$do_carry_queries = false;
1317	}
1318	}
1319
1320	// For each existing request value, we create a hidden input to carry it through a form.
1321	if ($do_carry_queries) {
1322	// Join the global _carry_queries and local one_time_carry_queries.
1323	// urlencode is not used here, not for form data!
1324	$query_args = array_merge($this->_carry_queries, $one_time_carry_queries);
1325	foreach ($query_args as $key => $val) {
1326	if (is_array($val)) {
1327	foreach ($val as $subval) {
1328	if ('' != $key && '' != $subval) {
1329	$out .= sprintf('<input type="hidden" name="%s[]" value="%s" />', $key, $subval);
1330	}
1331	}
1332	} else if ('' != $key && '' != $val) {
1333	$out .= sprintf('<input type="hidden" name="%s" value="%s" />', $key, $val);
1334	}
1335	}
1336	unset($query_args, $key, $val, $subval);
1337	}
1338
1339	// Include the SID if:
1340	// * cookies are disabled
1341	// * the system isn't automatically adding trans_sid
1342	// * the session is enabled
1343	// * and we're configured to use trans_sid
1344	if (!isset($_COOKIE[session_name()])
1345	&& !ini_get('session.use_trans_sid')
1346	&& $this->getParam('enable_session')
1347	&& $this->getParam('session_use_trans_sid')
1348	) {
1349	$out .= sprintf('<input type="hidden" name="%s" value="%s" />', session_name(), session_id());
1350	}
1351
1352	// Include the csrf_token in the form.
1353	// This token can be validated upon form submission with $app->verifyCSRFToken() or $app->requireValidCSRFToken()
1354	if ($this->getParam('csrf_token_enabled') && $include_csrf_token) {
1355	$out .= sprintf('<input type="hidden" name="%s" value="%s" />', $this->getParam('csrf_token_name'), $this->getCSRFToken());
1356	}
1357
1358	return $out;
1359	}
1360
1361	/**
1362	* Prints a hidden form element with the PHPSESSID when cookies are not used, as well
1363	* as hidden form elements for GET_VARS that might be in use.
1364	*
1365	* @param mixed $carry_args Additional url arguments to carry in the query,
1366	* or FALSE to prevent carrying queries. Can be any of the following formats:
1367	* array('key1', key2', key3') <-- to save these keys if in the form data.
1368	* array('key1'=>'value', key2'='value') <-- to set keys to default values if not present in form data.
1369	* false <-- To not carry any queries. If URL already has queries those will be retained.
1370	* @param bool $include_csrf_token Set to true to include the csrf_token in the form. Only use this for forms with action="post" to prevent the token from being revealed in the URL.
1371	*/
1372	public function printHiddenSession($carry_args=null, $include_csrf_token=false)
1373	{
1374	echo $this->getHiddenSession($carry_args, $include_csrf_token);
1375	}
1376
1377	/*
1378	* Return a URL with a version number attached. This is useful for overriding network caches ("cache buster") for sourced media, e.g., /style.css?812763482
1379	*
1380	* @access public
1381	* @param string $url URL to media (e.g., /foo.js)
1382	* @return string URL with cache-busting version appended (/foo.js?v=1234567890)
1383	* @author Quinn Comendant <quinn@strangecode.com>
1384	* @version 1.0
1385	* @since 03 Sep 2014 22:40:24
1386	*/
1387	public function cacheBustURL($url)
1388	{
1389	// Get the first delimiter that is needed in the url.
1390	$delim = mb_strpos($url, '?') !== false ? ini_get('arg_separator.output') : '?';
1391	$v = crc32($this->getParam('codebase_version') . '\|' . $this->getParam('site_version'));
1392	return sprintf('%s%sv=%s', $url, $delim, $v);
1393	}
1394
1395	/*
1396	* Generate a csrf_token if it doesn't exist or is expired, save it to the session and return its value.
1397	* Otherwise just return the current token.
1398	* Details on the synchronizer token pattern:
1399	* https://www.owasp.org/index.php/Cross-Site_Request_Forgery_(CSRF)_Prevention_Cheat_Sheet#General_Recommendation:_Synchronizer_Token_Pattern
1400	*
1401	* @access public
1402	* @return string The new or current csrf_token
1403	* @author Quinn Comendant <quinn@strangecode.com>
1404	* @version 1.0
1405	* @since 15 Nov 2014 17:57:17
1406	*/
1407	public function getCSRFToken()
1408	{
1409	if (!isset($_SESSION['_app'][$this->_ns]['csrf_token']) \|\| (removeSignature($_SESSION['_app'][$this->_ns]['csrf_token']) + $this->getParam('csrf_token_timeout') < time())) {
1410	// No token, or token is expired; generate one and return it.
1411	return $_SESSION['_app'][$this->_ns]['csrf_token'] = addSignature(time(), null, 64);
1412	}
1413	// Current token is not expired; return it.
1414	return $_SESSION['_app'][$this->_ns]['csrf_token'];
1415	}
1416
1417	/*
1418	* Compares the given csrf_token with the current or previous one saved in the session.
1419	*
1420	* @access public
1421	* @param string $user_submitted_csrf_token The user-submitted token to compare with the session token.
1422	* @param string $csrf_token The token to compare with the session token.
1423	* @return bool True if the tokens match, false otherwise.
1424	* @author Quinn Comendant <quinn@strangecode.com>
1425	* @version 1.0
1426	* @since 15 Nov 2014 18:06:55
1427	*/
1428	public function verifyCSRFToken($user_submitted_csrf_token)
1429	{
1430
1431	if (!$this->getParam('csrf_token_enabled')) {
1432	$this->logMsg(sprintf('%s called, but csrf_token_enabled=false', __METHOD__), LOG_ERR, __FILE__, __LINE__);
1433	return true;
1434	}
1435	if ('' == trim($user_submitted_csrf_token)) {
1436	$this->logMsg(sprintf('Empty string failed CSRF verification.', null), LOG_NOTICE, __FILE__, __LINE__);
1437	return false;
1438	}
1439	if (!verifySignature($user_submitted_csrf_token, null, 64)) {
1440	$this->logMsg(sprintf('Input failed CSRF verification (invalid signature in %s).', $user_submitted_csrf_token), LOG_WARNING, __FILE__, __LINE__);
1441	return false;
1442	}
1443	$csrf_token = $this->getCSRFToken();
1444	if ($user_submitted_csrf_token != $csrf_token) {
1445	$this->logMsg(sprintf('Input failed CSRF verification (%s not in %s).', $user_submitted_csrf_token, $csrf_token), LOG_WARNING, __FILE__, __LINE__);
1446	return false;
1447	}
1448	$this->logMsg(sprintf('Verified CSRF token %s', $user_submitted_csrf_token), LOG_DEBUG, __FILE__, __LINE__);
1449	return true;
1450	}
1451
1452	/*
1453	* Bounce user if they submit a token that doesn't match the one saved in the session.
1454	* Because this function calls dieURL() it must be called before any other HTTP header output.
1455	*
1456	* @access public
1457	* @param string $message Optional message to display to the user (otherwise default message will display). Set to an empty string to display no message.
1458	* @param int $type The type of message: MSG_NOTICE,
1459	* MSG_SUCCESS, MSG_WARNING, or MSG_ERR.
1460	* @param string $file __FILE__.
1461	* @param string $line __LINE__.
1462	* @return void
1463	* @author Quinn Comendant <quinn@strangecode.com>
1464	* @version 1.0
1465	* @since 15 Nov 2014 18:10:17
1466	*/
1467	public function requireValidCSRFToken($message=null, $type=MSG_NOTICE, $file=null, $line=null)
1468	{
1469	if (!$this->verifyCSRFToken(getFormData($this->getParam('csrf_token_name')))) {
1470	$message = isset($message) ? $message : _("Sorry, the form token expired. Please try again.");
1471	$this->raiseMsg($message, $type, $file, $line);
1472	$this->dieBoomerangURL();
1473	}
1474	}
1475
1476	/**
1477	* Uses an http header to redirect the client to the given $url. If sessions are not used
1478	* and the session is not already defined in the given $url, the SID is appended as a URI query.
1479	* As with all header generating functions, make sure this is called before any other output.
1480	* Using relative URI with Location: header is valid as per https://tools.ietf.org/html/rfc7231#section-7.1.2
1481	*
1482	* @param string $url The URL the client will be redirected to.
1483	* @param mixed $carry_args Additional url arguments to carry in the query,
1484	* or FALSE to prevent carrying queries. Can be any of the following formats:
1485	* -array('key1', key2', key3') <-- to save these keys if in the form data.
1486	* -array('key1' => 'value', key2' => 'value') <-- to set keys to default values if not present in form data.
1487	* -false <-- To not carry any queries. If URL already has queries those will be retained.
1488	* @param bool $always_include_sid Force session id to be added to Location header.
1489	*/
1490	public function dieURL($url, $carry_args=null, $always_include_sid=false)
1491	{
1492	if (!$this->running) {
1493	$this->logMsg(sprintf('Canceled %s, application not running.', __METHOD__), LOG_NOTICE, __FILE__, __LINE__);
1494	return false;
1495	}
1496
1497	if ('' == $url) {
1498	// If URL is not specified, use the redirect_home_url.
1499	$url = $this->getParam('redirect_home_url');
1500	}
1501
1502	$url = $this->url($url, $carry_args, $always_include_sid);
1503
1504	// Should we send a "303 See Other" header here instead of relying on the 302 sent automatically by PHP?
1505	if (!headers_sent($h_file, $h_line)) {
1506	header(sprintf('Location: %s', $url));
1507	$this->logMsg(sprintf('dieURL: %s', $url), LOG_DEBUG, __FILE__, __LINE__);
1508	} else {
1509	// Fallback: die using meta refresh instead.
1510	printf('<meta http-equiv="refresh" content="0;url=%s" />', $url);
1511	$this->logMsg(sprintf('dieURL (refresh): %s; headers already sent (output started in %s : %s)', $url, $h_file, $h_line), LOG_NOTICE, __FILE__, __LINE__);
1512	}
1513
1514	// End application.
1515	// Recommended, although I'm not sure it's necessary: https://www.php.net/session_write_close
1516	$this->stop();
1517	die;
1518	}
1519
1520	/*
1521	* Redirects a user by calling $app->dieURL(). It will use:
1522	* 1. the stored boomerang URL, it it exists
1523	* 2. a specified $default_url, it it exists
1524	* 3. the referring URL, it it exists.
1525	* 4. redirect_home_url configuration variable.
1526	*
1527	* @access public
1528	* @param string $id Identifier for this script.
1529	* @param mixed $carry_args Additional arguments to carry in the URL automatically (see $app->url()).
1530	* @param string $default_url A default URL if there is not a valid specified boomerang URL.
1531	* @param bool $queryless_referrer_comparison Exclude the URL query from the refererIsMe() comparison.
1532	* @return bool False if the session is not running. No return otherwise.
1533	* @author Quinn Comendant <quinn@strangecode.com>
1534	* @since 31 Mar 2006 19:17:00
1535	*/
1536	public function dieBoomerangURL($id=null, $carry_args=null, $default_url=null, $queryless_referrer_comparison=false)
1537	{
1538	if (!$this->running) {
1539	$this->logMsg(sprintf('Canceled %s, application not running.', __METHOD__), LOG_NOTICE, __FILE__, __LINE__);
1540	return false;
1541	}
1542
1543	// Get URL from stored boomerang. Allow non specific URL if ID not valid.
1544	if ($this->validBoomerangURL($id, true)) {
1545	if (isset($id) && isset($_SESSION['_app'][$this->_ns]['boomerang'][$id])) {
1546	$url = $_SESSION['_app'][$this->_ns]['boomerang'][$id]['url'];
1547	$this->logMsg(sprintf('dieBoomerangURL(%s) found: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
1548	} else {
1549	$url = end($_SESSION['_app'][$this->_ns]['boomerang'])['url'];
1550	$this->logMsg(sprintf('dieBoomerangURL(%s) using: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
1551	}
1552	// Delete stored boomerang.
1553	$this->deleteBoomerangURL($id);
1554	} else if (isset($default_url)) {
1555	$url = $default_url;
1556	} else if (!refererIsMe(true === $queryless_referrer_comparison) && '' != ($url = getenv('HTTP_REFERER'))) {
1557	// Ensure that the redirecting page is not also the referrer.
1558	$this->logMsg(sprintf('dieBoomerangURL(%s) using referrer: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
1559	} else {
1560	// If URL is not specified, use the redirect_home_url.
1561	$url = $this->getParam('redirect_home_url');
1562	$this->logMsg(sprintf('dieBoomerangURL(%s) using redirect_home_url: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
1563	}
1564
1565	// A redirection will never happen immediately twice. Set the time so we can ensure this doesn't happen.
1566	$_SESSION['_app'][$this->_ns]['boomerang_last_redirect_time'] = time();
1567
1568	// Do it.
1569	$this->dieURL($url, $carry_args);
1570	}
1571
1572	/**
1573	* Set the URL to return to when $app->dieBoomerangURL() is called.
1574	*
1575	* @param string $url A fully validated URL.
1576	* @param bool $id An identification tag for this url.
1577	* FIXME: url garbage collection?
1578	*/
1579	public function setBoomerangURL($url=null, $id=null)
1580	{
1581	if (!$this->running) {
1582	$this->logMsg(sprintf('Canceled %s, application not running.', __METHOD__), LOG_NOTICE, __FILE__, __LINE__);
1583	return false;
1584	}
1585
1586	if ('' != $url && is_string($url)) {
1587	// Delete any boomerang request keys in the query string (along with any trailing delimiters after the deletion).
1588	$url = preg_replace(array('/([&?])boomerang=[^&?]+[&?]?/' . $this->getParam('preg_u'), '/[&?]$/'), array('$1', ''), $url);
1589
1590	if (isset($_SESSION['_app'][$this->_ns]['boomerang']) && is_array($_SESSION['_app'][$this->_ns]['boomerang']) && !empty($_SESSION['_app'][$this->_ns]['boomerang'])) {
1591	// If the ID already exists in the boomerang array, delete it.
1592	foreach (array_keys($_SESSION['_app'][$this->_ns]['boomerang']) as $existing_id) {
1593	// $existing_id could be null if existing boomerang URL was set without an ID.
1594	if ($existing_id === $id) {
1595	$this->logMsg(sprintf('Deleted existing boomerang URL matching ID: %s=>%s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
1596	unset($_SESSION['_app'][$this->_ns]['boomerang'][$existing_id]);
1597	}
1598	}
1599	}
1600
1601	// A redirection will never happen immediately after setting the boomerang URL.
1602	// Set the time so ensure this doesn't happen. See $app->validBoomerangURL for more.
1603	if (isset($id)) {
1604	$_SESSION['_app'][$this->_ns]['boomerang'][$id] = array(
1605	'url' => $url,
1606	'added_time' => time(),
1607	);
1608	} else {
1609	$_SESSION['_app'][$this->_ns]['boomerang'][] = array(
1610	'url' => $url,
1611	'added_time' => time(),
1612	);
1613	}
1614
1615	$this->logMsg(sprintf('setBoomerangURL(%s): %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
1616	return true;
1617	} else {
1618	$this->logMsg(sprintf('setBoomerangURL(%s) is empty!', $id, $url), LOG_NOTICE, __FILE__, __LINE__);
1619	return false;
1620	}
1621	}
1622
1623	/**
1624	* Return the URL set for the specified $id, or an empty string if one isn't set.
1625	*
1626	* @param string $id An identification tag for this url.
1627	*/
1628	public function getBoomerangURL($id=null)
1629	{
1630	if (!$this->running) {
1631	$this->logMsg(sprintf('Canceled %s, application not running.', __METHOD__), LOG_NOTICE, __FILE__, __LINE__);
1632	return false;
1633	}
1634
1635	if (isset($id)) {
1636	if (isset($_SESSION['_app'][$this->_ns]['boomerang'][$id])) {
1637	return $_SESSION['_app'][$this->_ns]['boomerang'][$id]['url'];
1638	} else {
1639	return '';
1640	}
1641	} else if (isset($_SESSION['_app'][$this->_ns]['boomerang']) && is_array($_SESSION['_app'][$this->_ns]['boomerang']) && !empty($_SESSION['_app'][$this->_ns]['boomerang'])) {
1642	return end($_SESSION['_app'][$this->_ns]['boomerang'])['url'];
1643	} else {
1644	return false;
1645	}
1646	}
1647
1648	/**
1649	* Delete the URL set for the specified $id.
1650	*
1651	* @param string $id An identification tag for this url.
1652	*/
1653	public function deleteBoomerangURL($id=null)
1654	{
1655	if (!$this->running) {
1656	$this->logMsg(sprintf('Canceled %s, application not running.', __METHOD__), LOG_NOTICE, __FILE__, __LINE__);
1657	return false;
1658	}
1659
1660	if (isset($id) && isset($_SESSION['_app'][$this->_ns]['boomerang'][$id])) {
1661	$url = $this->getBoomerangURL($id);
1662	unset($_SESSION['_app'][$this->_ns]['boomerang'][$id]);
1663	} else if (is_array($_SESSION['_app'][$this->_ns]['boomerang'])) {
1664	$url = array_pop($_SESSION['_app'][$this->_ns]['boomerang'])['url'];
1665	}
1666	$this->logMsg(sprintf('deleteBoomerangURL(%s): %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
1667	}
1668
1669	/**
1670	* Check if a valid boomerang URL value has been set. A boomerang URL is considered
1671	* valid if: 1) it is not empty, 2) it is not the current URL, and 3) has not been accessed within n seconds.
1672	*
1673	* @return bool True if it is set and valid, false otherwise.
1674	*/
1675	public function validBoomerangURL($id=null, $use_nonspecificboomerang=false)
1676	{
1677	if (!$this->running) {
1678	$this->logMsg(sprintf('Canceled %s, application not running.', __METHOD__), LOG_NOTICE, __FILE__, __LINE__);
1679	return false;
1680	}
1681
1682	if (!isset($_SESSION['_app'][$this->_ns]['boomerang']) \|\| !is_array($_SESSION['_app'][$this->_ns]['boomerang']) \|\| empty($_SESSION['_app'][$this->_ns]['boomerang'])) {
1683	$this->logMsg(sprintf('validBoomerangURL(%s) no boomerang URL set, not an array, or empty.', $id), LOG_DEBUG, __FILE__, __LINE__);
1684	return false;
1685	}
1686
1687	$url = '';
1688	if (isset($id) && isset($_SESSION['_app'][$this->_ns]['boomerang'][$id])) {
1689	$url = $_SESSION['_app'][$this->_ns]['boomerang'][$id]['url'];
1690	$added_time = $_SESSION['_app'][$this->_ns]['boomerang'][$id]['added_time'];
1691	} else if (!isset($id) \|\| $use_nonspecificboomerang) {
1692	// Use most recent, non-specific boomerang if available.
1693	$url = end($_SESSION['_app'][$this->_ns]['boomerang'])['url'];
1694	$added_time = end($_SESSION['_app'][$this->_ns]['boomerang'])['added_time'];
1695	}
1696
1697	if ('' == trim($url)) {
1698	$this->logMsg(sprintf('validBoomerangURL(%s) not valid, empty!', $id), LOG_DEBUG, __FILE__, __LINE__);
1699	return false;
1700	}
1701
1702	if ($url == absoluteMe() \|\| $url == getenv('REQUEST_URI')) {
1703	// The URL we are directing to is the current page.
1704	$this->logMsg(sprintf('validBoomerangURL(%s) not valid, same as absoluteMe or REQUEST_URI: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
1705	return false;
1706	}
1707
1708	// Last redirect time is the time stamp of the last boomerangURL redirection, if any. A boomerang redirection should always occur at least several seconds after the last boomerang redirect (time it takes to load a page and receive user interaction).
1709	$boomerang_last_redirect_time = isset($_SESSION['_app'][$this->_ns]['boomerang_last_redirect_time']) ? $_SESSION['_app'][$this->_ns]['boomerang_last_redirect_time'] : null;
1710	if (isset($boomerang_last_redirect_time) && $boomerang_last_redirect_time >= (time() - 2)) {
1711	// Last boomerang direction was less than 2 seconds ago.
1712	$this->logMsg(sprintf('validBoomerangURL(%s) not valid, boomerang_last_redirect_time too short: %s seconds', $id, time() - $boomerang_last_redirect_time), LOG_DEBUG, __FILE__, __LINE__);
1713	return false;
1714	}
1715
1716	if (isset($added_time) && $added_time < (time() - 72000)) {
1717	// Last boomerang direction was more than 20 hours ago.
1718	$this->logMsg(sprintf('validBoomerangURL(%s) not valid, added_time too old: %s seconds', $id, time() - $added_time), LOG_DEBUG, __FILE__, __LINE__);
1719	// Delete this defunct boomerang.
1720	$this->deleteBoomerangURL($id);
1721	return false;
1722	}
1723
1724	$this->logMsg(sprintf('validBoomerangURL(%s) is valid: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
1725	return true;
1726	}
1727
1728	/**
1729	* This function has changed to do nothing. SSL redirection should happen at the server layer, doing so here may result in a redirect loop.
1730	*/
1731	public function sslOn()
1732	{
1733	$this->logMsg(sprintf('sslOn was called and ignored.', null), LOG_DEBUG, __FILE__, __LINE__);
1734	}
1735
1736	/**
1737	* This function has changed to do nothing. There is no reason to prefer a non-SSL connection, and doing so may result in a redirect loop.
1738	*/
1739	public function sslOff()
1740	{
1741	$this->logMsg(sprintf('sslOff was called and ignored.', null), LOG_DEBUG, __FILE__, __LINE__);
1742	}
1743
1744	/*
1745	* Sets a cookie, with error checking and some sane defaults.
1746	*
1747	* @access public
1748	* @param string $name The name of the cookie.
1749	* @param string $value The value of the cookie.
1750	* @param string $expire The time the cookie expires, as a unix timestamp or string value passed to strtotime.
1751	* @param string $path The path on the server in which the cookie will be available on.
1752	* @param string $domain The domain that the cookie is available to.
1753	* @param bool $secure Indicates that the cookie should only be transmitted over a secure HTTPS connection from the client.
1754	* @param bool $httponly When TRUE the cookie will be made accessible only through the HTTP protocol (makes cookies unreadable to javascript).
1755	* @param string $samesite Value of the SameSite key ('None', 'Lax', or 'Strict'). PHP 7.3+ only.
1756	* @return bool True on success, false on error.
1757	* @author Quinn Comendant <quinn@strangecode.com>
1758	* @version 1.0
1759	* @since 02 May 2014 16:36:34
1760	*/
1761	public function setCookie($name, $value, $expire='+10 years', $path='/', $domain=null, $secure=null, $httponly=null, $samesite=null)
1762	{
1763	if (!is_scalar($name)) {
1764	$this->logMsg(sprintf('Cookie name must be scalar, is not: %s', getDump($name)), LOG_NOTICE, __FILE__, __LINE__);
1765	return false;
1766	}
1767	if (!is_scalar($value)) {
1768	$this->logMsg(sprintf('Cookie "%s" value must be scalar, is not: %s', $name, getDump($value)), LOG_NOTICE, __FILE__, __LINE__);
1769	return false;
1770	}
1771
1772	// Defaults.
1773	$expire = (is_numeric($expire) ? $expire : (is_string($expire) ? strtotime($expire) : $expire));
1774	$secure = $secure ?: getenv('HTTPS') == 'on';
1775	$httponly = $httponly ?: true;
1776	$samesite = $samesite ?: 'Lax';
1777
1778	// Make sure the expiration date is a valid 32bit integer.
1779	if (is_int($expire) && $expire > 2147483647) {
1780	$this->logMsg(sprintf('Cookie "%s" expire time exceeds a 32bit integer (%s)', $key, date('r', $expire)), LOG_NOTICE, __FILE__, __LINE__);
1781	}
1782
1783	// Measure total cookie length and warn if larger than max recommended size of 4093.
1784	// https://stackoverflow.com/questions/640938/what-is-the-maximum-size-of-a-web-browsers-cookies-key
1785	// The date and header name adds 51 bytes: Set-Cookie: ; expires=Fri, 03-May-2024 00:04:47 GMT
1786	$cookielen = strlen($name . $value . $path . $domain . ($secure ? '; secure' : '') . ($httponly ? '; httponly' : '') . ($samesite ? '; SameSite=' . $samesite : '')) + 51;
1787	if ($cookielen > 4093) {
1788	$this->logMsg(sprintf('Cookie "%s" has a size greater than 4093 bytes (is %s bytes)', $key, $cookielen), LOG_NOTICE, __FILE__, __LINE__);
1789	}
1790
1791	// Ensure PHP version allow use of httponly.
1792	if (version_compare(PHP_VERSION, '7.3.0', '>=')) {
1793	$ret = setcookie($name, $value, [
1794	'expires' => $expire,
1795	'path' => $path,
1796	'domain' => $domain,
1797	'secure' => $secure,
1798	'httponly' => $httponly,
1799	'samesite' => $samesite,
1800	]);
1801	} else if (version_compare(PHP_VERSION, '5.2.0', '>=')) {
1802	$ret = setcookie($name, $value, $expire, $path, $domain, $secure, $httponly);
1803	} else {
1804	$ret = setcookie($name, $value, $expire, $path, $domain, $secure);
1805	}
1806
1807	if (false === $ret) {
1808	$this->logMsg(sprintf('Failed to set cookie (%s=%s) probably due to output before headers.', $name, $value), LOG_NOTICE, __FILE__, __LINE__);
1809	}
1810	return $ret;
1811	}
1812
1813	/*
1814	* Set timezone used internally by PHP. See full list at https://www.php.net/manual/en/timezones.php
1815	*
1816	* @access public
1817	* @param string $tz Timezone, e.g., America/Mexico_City
1818	* @return
1819	* @author Quinn Comendant <quinn@strangecode.com>
1820	* @since 28 Jan 2019 16:38:38
1821	*/
1822	public function setTimezone($tz)
1823	{
1824	// Set timezone for PHP.
1825	if (date_default_timezone_set($tz)) {
1826	$this->logMsg(sprintf('Using php timezone: %s', $tz), LOG_DEBUG, __FILE__, __LINE__);
1827	} else {
1828	// Failed!
1829	$this->logMsg(sprintf('Failed to set php timezone: %s', $tz), LOG_WARNING, __FILE__, __LINE__);
1830	}
1831	}
1832
1833	/*
1834	*
1835	*
1836	* @access public
1837	* @param
1838	* @return
1839	* @author Quinn Comendant <quinn@strangecode.com>
1840	* @since 17 Feb 2019 13:11:20
1841	*/
1842	public function colorCLI($color)
1843	{
1844	switch ($color) {
1845	case 'white':
1846	echo "\033[0;37m";
1847	break;
1848	case 'black':
1849	echo "\033[0;30m";
1850	break;
1851	case 'red':
1852	echo "\033[0;31m";
1853	break;
1854	case 'yellow':
1855	echo "\033[0;33m";
1856	break;
1857	case 'green':
1858	echo "\033[0;32m";
1859	break;
1860	case 'cyan':
1861	echo "\033[0;36m";
1862	break;
1863	case 'blue':
1864	echo "\033[0;34m";
1865	break;
1866	case 'purple':
1867	echo "\033[0;35m";
1868	break;
1869	case 'off':
1870	default:
1871	echo "\033[0m";
1872	break;
1873	}
1874	}
1875	} // End.

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