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source: trunk/lib/App.inc.php @ 173

Last change on this file since 173 was 172, checked in by scdev, 18 years ago
Q - added caching to ACL, and flush command to acl.cli.php
File size: 44.0 KB

Rev	Line
[1]	1	<?php
	2	/**
	3	* App.inc.php
	4	* code by strangecode :: www.strangecode.com :: this document contains copyrighted information
	5	*
	6	* Primary application framework class.
	7	*
	8	* @author Quinn Comendant <quinn@strangecode.com>
[136]	9	* @version 2.1
[1]	10	*/
[42]	11
[37]	12	// Message Types.
	13	define('MSG_ERR', 1);
	14	define('MSG_ERROR', MSG_ERR);
[1]	15	define('MSG_WARNING', 2);
[37]	16	define('MSG_NOTICE', 4);
	17	define('MSG_SUCCESS', 8);
[119]	18	define('MSG_ALL', MSG_SUCCESS \| MSG_NOTICE \| MSG_WARNING \| MSG_ERROR);
[1]	19
	20	require_once dirname(__FILE__) . '/Utilities.inc.php';
	21
	22	class App {
[42]	23
[136]	24	// Namespace of this application instance.
	25	var $_ns;
[1]	26
[136]	27	// If $app->start has run successfully.
[1]	28	var $running = false;
	29
	30	// Instance of database object.
	31	var $db;
[42]	32
[20]	33	// Array of query arguments will be carried persistently between requests.
	34	var $_carry_queries = array();
[1]	35
[136]	36	// Dictionary of global application parameters.
[1]	37	var $_params = array();
	38
	39	// Default parameters.
	40	var $_param_defaults = array(
	41
	42	// Public name and email address for this application.
	43	'site_name' => null,
	44	'site_email' => null,
[39]	45	'site_url' => '', // URL automatically determined by _SERVER['HTTP_HOST'] if not set here.
[1]	46
[136]	47	// The location the user will go if the system doesn't know where else to send them.
[1]	48	'redirect_home_url' => '/',
[42]	49
[136]	50	// SSL URL used when redirecting with $app->sslOn().
[1]	51	'ssl_domain' => null,
	52	'ssl_enabled' => false,
[42]	53
[20]	54	// Character set for page output. Used in the Content-Type header and the HTML <meta content-type> tag.
[1]	55	'character_set' => 'utf-8',
	56
	57	// Human-readable format used to display dates.
	58	'date_format' => 'd M Y',
[101]	59	'time_format' => 'h:i:s A',
[1]	60	'sql_date_format' => '%e %b %Y',
	61	'sql_time_format' => '%k:%i',
	62
	63	// Use php sessions?
	64	'enable_session' => false,
	65	'session_name' => 'Strangecode',
	66	'session_use_cookies' => true,
[42]	67
[1]	68	// Use database?
	69	'enable_db' => false,
	70
	71	// Use db-based sessions?
	72	'enable_db_session_handler' => false,
[42]	73
[1]	74	// DB passwords should be set as apache environment variables in httpd.conf, readable only by root.
	75	'db_server' => 'localhost',
	76	'db_name' => null,
	77	'db_user' => null,
	78	'db_pass' => null,
	79
	80	// Database debugging.
	81	'db_always_debug' => false, // TRUE = display all SQL queries.
	82	'db_debug' => false, // TRUE = display db errors.
	83	'db_die_on_failure' => false, // TRUE = script stops on db error.
[42]	84
[1]	85	// For classes that require db tables, do we check that a table exists and create if missing?
[32]	86	'db_create_tables' => true,
[1]	87
[136]	88	// The level of error reporting. Don't change this to suppress messages, instead use display_errors to control display.
[1]	89	'error_reporting' => E_ALL,
	90
	91	// Don't display errors by default; it is preferable to log them to a file.
	92	'display_errors' => false,
[42]	93
[1]	94	// Directory in which to store log files.
[19]	95	'log_directory' => '',
[1]	96
	97	// PHP error log.
	98	'php_error_log' => 'php_error_log',
	99
	100	// General application log.
[136]	101	'log_filename' => 'app_log',
[1]	102
	103	// Logging priority can be any of the following, or false to deactivate:
	104	// LOG_EMERG system is unusable
	105	// LOG_ALERT action must be taken immediately
	106	// LOG_CRIT critical conditions
	107	// LOG_ERR error conditions
	108	// LOG_WARNING warning conditions
	109	// LOG_NOTICE normal, but significant, condition
	110	// LOG_INFO informational message
	111	// LOG_DEBUG debug-level message
	112	'log_file_priority' => false,
	113	'log_email_priority' => false,
	114	'log_sms_priority' => false,
	115	'log_screen_priority' => false,
[42]	116
[1]	117	// Email address to receive log event emails.
	118	'log_to_email_address' => null,
[42]	119
[19]	120	// SMS Email address to receive log event SMS messages.
[1]	121	'log_to_sms_address' => null,
[42]	122
[19]	123	// A key for calculating simple cryptographic signatures. Set using as an environment variables in the httpd.conf with 'SetEnv SIGNING_KEY <key>'.
[136]	124	// Existing password hashes rely on the same key/salt being used to compare encryptions.
	125	// Don't change this unless you know existing hashes or signatures will not be affected!
[1]	126	'signing_key' => 'aae6abd6209d82a691a9f96384a7634a',
	127	);
[42]	128
[1]	129	/**
	130	* This method enforces the singleton pattern for this class. Only one application is running at a time.
	131	*
[136]	132	* $param string $namespace Name of this application.
	133	* @return object Reference to the global Cache object.
[1]	134	* @access public
	135	* @static
	136	*/
[136]	137	function &getInstance($namespace='')
[1]	138	{
	139	static $instance = null;
	140
	141	if ($instance === null) {
[136]	142	$instance = new App($namespace);
[1]	143	}
	144
	145	return $instance;
	146	}
[42]	147
[1]	148	/**
	149	* Constructor.
	150	*/
[136]	151	function App($namespace='')
[1]	152	{
[136]	153	// Set namespace of application instance.
[154]	154	$this->_ns = $namespace;
[42]	155
[1]	156	// Initialize default parameters.
	157	$this->_params = array_merge($this->_params, $this->_param_defaults);
[172]	158
	159	// Begin timing script.
	160	require_once dirname(__FILE__) . '/ScriptTimer.inc.php';
	161	$this->timer = new ScriptTimer();
	162	$this->timer->start('_app');
[1]	163	}
	164
	165	/**
	166	* Set (or overwrite existing) parameters by passing an array of new parameters.
	167	*
	168	* @access public
	169	* @param array $param Array of parameters (key => val pairs).
	170	*/
	171	function setParam($param=null)
	172	{
	173	if (isset($param) && is_array($param)) {
	174	// Merge new parameters with old overriding only those passed.
[136]	175	$this->_params = array_merge($this->_params, $param);
[1]	176	}
	177	}
	178
	179	/**
	180	* Return the value of a parameter.
	181	*
	182	* @access public
	183	* @param string $param The key of the parameter to return.
	184	* @return mixed Parameter value, or null if not existing.
	185	*/
[136]	186	function getParam($param=null)
[1]	187	{
	188	if ($param === null) {
[136]	189	return $this->_params;
	190	} else if (isset($this->_params[$param])) {
	191	return $this->_params[$param];
[1]	192	} else {
[19]	193	trigger_error(sprintf('Parameter is not set: %s', $param), E_USER_NOTICE);
[1]	194	return null;
	195	}
	196	}
[42]	197
[1]	198	/**
	199	* Begin running this application.
	200	*
	201	* @access public
	202	* @author Quinn Comendant <quinn@strangecode.com>
	203	* @since 15 Jul 2005 00:32:21
	204	*/
	205	function start()
	206	{
	207	if ($this->running) {
	208	return false;
	209	}
[42]	210
[1]	211	// Error reporting.
	212	ini_set('error_reporting', $this->getParam('error_reporting'));
	213	ini_set('display_errors', $this->getParam('display_errors'));
	214	ini_set('log_errors', true);
	215	if (is_dir($this->getParam('log_directory')) && is_writable($this->getParam('log_directory'))) {
	216	ini_set('error_log', $this->getParam('log_directory') . '/' . $this->getParam('php_error_log'));
	217	}
[42]	218
	219
[1]	220	/**
	221	* 1. Start Database.
	222	*/
[42]	223
[103]	224	if (true === $this->getParam('enable_db')) {
[42]	225
[1]	226	// DB connection parameters taken from environment variables in the httpd.conf file, readable only by root.
	227	if (!empty($_SERVER['DB_SERVER'])) {
	228	$this->setParam(array('db_server' => $_SERVER['DB_SERVER']));
	229	}
	230	if (!empty($_SERVER['DB_NAME'])) {
	231	$this->setParam(array('db_name' => $_SERVER['DB_NAME']));
	232	}
	233	if (!empty($_SERVER['DB_USER'])) {
	234	$this->setParam(array('db_user' => $_SERVER['DB_USER']));
	235	}
	236	if (!empty($_SERVER['DB_PASS'])) {
	237	$this->setParam(array('db_pass' => $_SERVER['DB_PASS']));
	238	}
[42]	239
[136]	240	// There will ever only be one instance of the DB object, and here is where it is instantiated.
[1]	241	require_once dirname(__FILE__) . '/DB.inc.php';
	242	$this->db =& DB::getInstance();
	243	$this->db->setParam(array(
	244	'db_server' => $this->getParam('db_server'),
	245	'db_name' => $this->getParam('db_name'),
	246	'db_user' => $this->getParam('db_user'),
	247	'db_pass' => $this->getParam('db_pass'),
	248	'db_always_debug' => $this->getParam('db_always_debug'),
	249	'db_debug' => $this->getParam('db_debug'),
	250	'db_die_on_failure' => $this->getParam('db_die_on_failure'),
	251	));
	252
	253	// Connect to database.
	254	$this->db->connect();
	255	}
[42]	256
	257
[1]	258	/**
	259	* 2. Start PHP session.
	260	*/
[42]	261
[1]	262	// Skip session for some user agents.
	263	if (preg_match('/Atomz\|ApacheBench\|Wget/i', getenv('HTTP_USER_AGENT'))) {
	264	$this->setParam(array('enable_session' => false));
	265	}
[42]	266
[1]	267	if (true === $this->getParam('enable_session')) {
[42]	268
[1]	269	if (true === $this->getParam('enable_db_session_handler') && true === $this->getParam('enable_db')) {
	270	// Database session handling.
	271	require_once dirname(__FILE__) . '/DBSessionHandler.inc.php';
	272	$db_save_handler = new DBSessionHandler($this->db, array(
	273	'db_table' => 'session_tbl',
	274	'create_table' => $this->getParam('db_create_tables'),
	275	));
	276	}
[42]	277
[1]	278	// Session parameters.
	279	ini_set('session.use_cookies', $this->getParam('session_use_cookies'));
	280	ini_set('session.use_trans_sid', false);
	281	ini_set('session.entropy_file', '/dev/urandom');
	282	ini_set('session.entropy_length', '512');
	283	session_name($this->getParam('session_name'));
[42]	284
[22]	285	// Start the session.
[1]	286	session_start();
[42]	287
[154]	288	if (!isset($_SESSION['_app'][$this->_ns])) {
[22]	289	// Access session data using: $_SESSION['...'].
	290	// Initialize here _after_ session has started.
[154]	291	$_SESSION['_app'][$this->_ns] = array(
[22]	292	'messages' => array(),
	293	'boomerang' => array('url'),
	294	);
	295	}
[1]	296	}
[42]	297
	298
[1]	299	/**
	300	* 3. Misc setup.
	301	*/
	302
	303	// Script URI will be something like http://host.name.tld (no ending slash)
	304	// and is used whenever a URL need be used to the current site.
	305	// Not available on cli scripts obviously.
[41]	306	if (isset($_SERVER['HTTP_HOST']) && '' != $_SERVER['HTTP_HOST'] && '' == $this->getParam('site_url')) {
[14]	307	$this->setParam(array('site_url' => sprintf('%s://%s', ('on' == getenv('HTTPS') ? 'https' : 'http'), getenv('HTTP_HOST'))));
[1]	308	}
	309
	310	// A key for calculating simple cryptographic signatures.
	311	if (isset($_SERVER['SIGNING_KEY'])) {
	312	$this->setParam(array('signing_key' => $_SERVER['SIGNING_KEY']));
	313	}
[42]	314
[1]	315	// Character set. This should also be printed in the html header template.
	316	header('Content-type: text/html; charset=' . $this->getParam('character_set'));
[136]	317
	318	// Set the version of the codebase we're using.
	319	$codebase_version_file = dirname(__FILE__) . '/../docs/version.txt';
	320	if (is_readable($codebase_version_file)) {
	321	$codebase_version = trim(file_get_contents($codebase_version_file));
[144]	322	$this->setParam(array('codebase_version' => $codebase_version));
[136]	323	header('X-Codebase-Version: ' . $codebase_version);
	324	}
[42]	325
[1]	326	$this->running = true;
	327	}
[42]	328
[1]	329	/**
	330	* Stop running this application.
	331	*
	332	* @access public
	333	* @author Quinn Comendant <quinn@strangecode.com>
	334	* @since 17 Jul 2005 17:20:18
	335	*/
	336	function stop()
	337	{
	338	session_write_close();
	339	restore_include_path();
	340	$this->running = false;
[172]	341	$num_queries = 0;
[103]	342	if (true === $this->getParam('enable_db')) {
[172]	343	$num_queries = $this->db->numQueries();
[103]	344	$this->db->close();
	345	}
[172]	346	$this->timer->stop('_app');
	347	$this->logMsg(sprintf('Script ended gracefully. Execution time: %s. Number of db queries: %s.', $this->timer->getTime('_app'), $num_queries), LOG_DEBUG, __FILE__, __LINE__);
[1]	348	}
[42]	349
	350
[1]	351	/**
[84]	352	* Add a message to the session, which is printed in the header.
[1]	353	* Just a simple way to print messages to the user.
	354	*
	355	* @access public
	356	*
	357	* @param string $message The text description of the message.
	358	* @param int $type The type of message: MSG_NOTICE,
	359	* MSG_SUCCESS, MSG_WARNING, or MSG_ERR.
	360	* @param string $file __FILE__.
	361	* @param string $line __LINE__.
	362	*/
	363	function raiseMsg($message, $type=MSG_NOTICE, $file=null, $line=null)
	364	{
[32]	365	$message = trim($message);
[1]	366
[136]	367	if (!$this->running \|\| '' == $message) {
	368	$this->logMsg(sprintf('Canceled method call %s, application not running or message is an empty string.', __FUNCTION__), LOG_NOTICE, __FILE__, __LINE__);
[1]	369	return false;
	370	}
[42]	371
[37]	372	// Save message in session under unique key to avoid duplicate messages.
[44]	373	$msg_id = md5($type . $message . $file . $line);
[154]	374	$_SESSION['_app'][$this->_ns]['messages'][$msg_id] = array(
[42]	375	'type' => $type,
[1]	376	'message' => $message,
	377	'file' => $file,
[44]	378	'line' => $line,
[154]	379	'count' => (isset($_SESSION['_app'][$this->_ns]['messages'][$msg_id]['count']) ? (1 + $_SESSION['_app'][$this->_ns]['messages'][$msg_id]['count']) : 1)
[1]	380	);
[42]	381
[1]	382	if (!in_array($type, array(MSG_NOTICE, MSG_SUCCESS, MSG_WARNING, MSG_ERR))) {
[136]	383	$this->logMsg(sprintf('Invalid MSG_* type: %s', $type), LOG_NOTICE, __FILE__, __LINE__);
[1]	384	}
	385	}
[46]	386
	387	/**
	388	* Returns an array of the raised messages.
	389	*
	390	* @access public
	391	* @return array List of messags in FIFO order.
	392	* @author Quinn Comendant <quinn@strangecode.com>
	393	* @since 21 Dec 2005 13:09:20
	394	*/
	395	function getRaisedMessages()
	396	{
[136]	397	if (!$this->running) {
	398	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_NOTICE, __FILE__, __LINE__);
	399	return false;
[46]	400	}
[42]	401
[154]	402	return isset($_SESSION['_app'][$this->_ns]['messages']) ? $_SESSION['_app'][$this->_ns]['messages'] : array();
[46]	403	}
	404
[1]	405	/**
[46]	406	* Resets the message list.
	407	*
	408	* @access public
	409	* @author Quinn Comendant <quinn@strangecode.com>
	410	* @since 21 Dec 2005 13:21:54
	411	*/
	412	function clearRaisedMessages()
	413	{
[136]	414	if (!$this->running) {
	415	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_NOTICE, __FILE__, __LINE__);
[46]	416	return false;
	417	}
	418
[154]	419	$_SESSION['_app'][$this->_ns]['messages'] = array();
[46]	420	}
	421
	422	/**
[1]	423	* Prints the HTML for displaying raised messages.
	424	*
	425	* @access public
	426	* @author Quinn Comendant <quinn@strangecode.com>
	427	* @since 15 Jul 2005 01:39:14
	428	*/
	429	function printRaisedMessages()
	430	{
[136]	431	if (!$this->running) {
	432	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_NOTICE, __FILE__, __LINE__);
[1]	433	return false;
	434	}
[136]	435
	436	$messages = $this->getRaisedMessages();
[167]	437	if (!empty($messages)) {
[163]	438	?><div id="sc-msg" class="sc-msg"><?php
[167]	439	foreach ($messages as $m) {
	440	if (error_reporting() > 0 && $this->getParam('display_errors') && isset($m['file']) && isset($m['line'])) {
	441	echo "\n<!-- [" . $m['file'] . ' : ' . $m['line'] . '] -->';
	442	}
	443	switch ($m['type']) {
	444	case MSG_ERR:
	445	echo '<div class="sc-msg-error">' . $m['message'] . '</div>';
	446	break;
[42]	447
[167]	448	case MSG_WARNING:
	449	echo '<div class="sc-msg-warning">' . $m['message'] . '</div>';
	450	break;
[42]	451
[167]	452	case MSG_SUCCESS:
	453	echo '<div class="sc-msg-success">' . $m['message'] . '</div>';
	454	break;
[42]	455
[167]	456	case MSG_NOTICE:
	457	default:
	458	echo '<div class="sc-msg-notice">' . $m['message'] . '</div>';
	459	break;
[42]	460
[167]	461	}
[1]	462	}
	463	?></div><?php
	464	}
[136]	465	$this->clearRaisedMessages();
[1]	466	}
[42]	467
[1]	468	/**
[44]	469	* Logs messages to defined channels: file, email, sms, and screen. Repeated messages are
	470	* not repeated but printed once with count.
[1]	471	*
	472	* @access public
	473	* @param string $message The text description of the message.
	474	* @param int $priority The type of message priority (in descending order):
	475	* LOG_EMERG system is unusable
	476	* LOG_ALERT action must be taken immediately
	477	* LOG_CRIT critical conditions
	478	* LOG_ERR error conditions
	479	* LOG_WARNING warning conditions
	480	* LOG_NOTICE normal, but significant, condition
	481	* LOG_INFO informational message
	482	* LOG_DEBUG debug-level message
	483	* @param string $file The file where the log event occurs.
	484	* @param string $line The line of the file where the log event occurs.
	485	*/
	486	function logMsg($message, $priority=LOG_INFO, $file=null, $line=null)
	487	{
[44]	488	static $previous_events = array();
	489
[1]	490	// If priority is not specified, assume the worst.
[136]	491	if (!$this->logPriorityToString($priority)) {
	492	$this->logMsg(sprintf('Log priority %s not defined. (Message: %s)', $priority, $message), LOG_EMERG, $file, $line);
[1]	493	$priority = LOG_EMERG;
	494	}
[42]	495
[15]	496	// If log file is not specified, don't log to a file.
[136]	497	if (!$this->getParam('log_directory') \|\| !$this->getParam('log_filename') \|\| !is_dir($this->getParam('log_directory')) \|\| !is_writable($this->getParam('log_directory'))) {
	498	$this->setParam(array('log_file_priority' => false));
	499	// We must use trigger_error to report this problem rather than calling $app->logMsg, which might lead to an infinite loop.
	500	trigger_error(sprintf('Codebase error: log directory (%s) not found or writable.', $this->getParam('log_directory')), E_USER_NOTICE);
[1]	501	}
[42]	502
[1]	503	// Make sure to log in the system's locale.
	504	$locale = setlocale(LC_TIME, 0);
	505	setlocale(LC_TIME, 'C');
[42]	506
[44]	507	// Strip HTML tags except any with more than 7 characters because that's probably not a HTML tag, e.g. <email@address.com>.
	508	preg_match_all('/(<[^>\s]{7,})[^>]*>/', $message, $strip_tags_allow);
	509	$message = strip_tags(preg_replace('/\s+/', ' ', $message), (!empty($strip_tags_allow[1]) ? join('> ', $strip_tags_allow[1]) . '>' : null));
	510
	511	// Store this event under a unique key, counting each time it occurs so that it only gets reported a limited number of times.
	512	$msg_id = md5($message . $priority . $file . $line);
	513	if (isset($previous_events[$msg_id])) {
	514	$previous_events[$msg_id]++;
	515	if ($previous_events[$msg_id] == 2) {
[136]	516	$this->logMsg(sprintf('%s (Event repeated %s or more times)', $message, $previous_events[$msg_id]), $priority, $file, $line);
[44]	517	}
	518	return false;
	519	} else {
	520	$previous_events[$msg_id] = 1;
	521	}
	522
[1]	523	// Data to be stored for a log event.
[44]	524	$event = array(
	525	'date' => date('Y-m-d H:i:s'),
	526	'remote ip' => getRemoteAddr(),
	527	'pid' => (substr(PHP_OS, 0, 3) != 'WIN' ? posix_getpid() : ''),
[136]	528	'type' => $this->logPriorityToString($priority),
[44]	529	'file:line' => "$file : $line",
[55]	530	'url' => (isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : ''),
[44]	531	'message' => $message
	532	);
[42]	533
[1]	534	// FILE ACTION
[136]	535	if ($this->getParam('log_file_priority') && $priority <= $this->getParam('log_file_priority')) {
[44]	536	$event_str = '[' . join('] [', $event) . ']';
[136]	537	error_log($event_str . "\n", 3, $this->getParam('log_directory') . '/' . $this->getParam('log_filename'));
[1]	538	}
[42]	539
[1]	540	// EMAIL ACTION
[136]	541	if ($this->getParam('log_email_priority') && $priority <= $this->getParam('log_email_priority')) {
[1]	542	$subject = sprintf('[%s %s] %s', getenv('HTTP_HOST'), $event['type'], $message);
	543	$email_msg = sprintf("A %s log event occured on %s\n\n", $event['type'], getenv('HTTP_HOST'));
[41]	544	$headers = "From: codebase@strangecode.com";
[1]	545	foreach ($event as $k=>$v) {
	546	$email_msg .= sprintf("%-11s%s\n", $k, $v);
	547	}
[136]	548	mail($this->getParam('log_to_email_address'), $subject, $email_msg, $headers, '-f codebase@strangecode.com');
[1]	549	}
[42]	550
[1]	551	// SMS ACTION
[136]	552	if ($this->getParam('log_sms_priority') && $priority <= $this->getParam('log_sms_priority')) {
[1]	553	$subject = sprintf('[%s %s]', getenv('HTTP_HOST'), $priority);
[41]	554	$sms_msg = sprintf('%s [%s:%s]', $event['message'], basename($file), $line);
	555	$headers = "From: codebase@strangecode.com";
[136]	556	mail($this->getParam('log_to_sms_address'), $subject, $sms_msg, $headers, '-f codebase@strangecode.com');
[1]	557	}
[42]	558
[1]	559	// SCREEN ACTION
[136]	560	if ($this->getParam('log_screen_priority') && $priority <= $this->getParam('log_screen_priority')) {
[1]	561	echo "[{$event['date']}] [{$event['type']}] [{$event['file:line']}] [{$event['message']}]\n";
	562	}
[42]	563
[1]	564	// Restore original locale.
	565	setlocale(LC_TIME, $locale);
	566	}
[42]	567
[1]	568	/**
	569	* Returns the string representation of a LOG_* integer constant.
	570	*
	571	* @param int $priority The LOG_* integer constant.
	572	*
	573	* @return The string representation of $priority.
	574	*/
	575	function logPriorityToString ($priority) {
	576	$priorities = array(
	577	LOG_EMERG => 'emergency',
	578	LOG_ALERT => 'alert',
	579	LOG_CRIT => 'critical',
	580	LOG_ERR => 'error',
	581	LOG_WARNING => 'warning',
	582	LOG_NOTICE => 'notice',
	583	LOG_INFO => 'info',
	584	LOG_DEBUG => 'debug'
	585	);
	586	if (isset($priorities[$priority])) {
	587	return $priorities[$priority];
	588	} else {
	589	return false;
	590	}
	591	}
[42]	592
[1]	593	/**
[20]	594	* Sets which query arguments will be carried persistently between requests.
[136]	595	* Values in the _carry_queries array will be copied to URLs (via $app->url()) and
[20]	596	* to hidden input values (via printHiddenSession()).
	597	*
	598	* @access public
[42]	599	* @param string $query_key The key of the query argument to save.
[170]	600	* @param mixed $default If the key is not available, set to this default value.
[20]	601	* @author Quinn Comendant <quinn@strangecode.com>
	602	* @since 14 Nov 2005 19:24:52
	603	*/
[170]	604	function carryQuery($query_key, $default=false)
[20]	605	{
	606	// If not already set, and there is a non-empty value provided in the request...
[170]	607	if (!isset($this->_carry_queries[$query_key]) && false !== getFormData($query_key, $default)) {
[20]	608	// Copy the value of the specified query argument into the _carry_queries array.
[170]	609	$this->_carry_queries[$query_key] = getFormData($query_key, $default);
[20]	610	}
	611	}
[42]	612
[20]	613	/**
[1]	614	* Outputs a fully qualified URL with a query of all the used (ie: not empty)
[42]	615	* keys and values, including optional queries. This allows mindless retention
[32]	616	* of query arguments across page requests. If cookies are not
[1]	617	* used, the session id will be propogated in the URL.
	618	*
[32]	619	* @param string $url The initial url
	620	* @param mixed $carry_args Additional url arguments to carry in the query,
	621	* or FALSE to prevent carrying queries. Can be any of the following formats:
	622	* array('key1', key2', key3') <-- to save these keys if in the form data.
	623	* array('key1'=>'value', key2'='value') <-- to set keys to default values if not present in form data.
	624	* false <-- To not carry any queries. If URL already has queries those will be retained.
[1]	625	*
	626	* @param mixed $always_include_sid Always add the session id, even if using_trans_sid = true. This is required when
	627	* URL starts with http, since PHP using_trans_sid doesn't do those and also for
	628	* header('Location...') redirections.
	629	*
	630	* @return string url with attached queries and, if not using cookies, the session id
	631	*/
[32]	632	function url($url, $carry_args=null, $always_include_sid=false)
[1]	633	{
[136]	634	if (!$this->running) {
	635	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_NOTICE, __FILE__, __LINE__);
[1]	636	return false;
	637	}
[42]	638
[20]	639	// Get any provided query arguments to include in the final URL.
	640	// If FALSE is a provided here, DO NOT carry the queries.
[1]	641	$do_carry_queries = true;
	642	$one_time_carry_queries = array();
	643	if (!is_null($carry_args)) {
	644	if (is_array($carry_args) && !empty($carry_args)) {
	645	foreach ($carry_args as $key=>$arg) {
	646	// Get query from appropriate source.
	647	if (false === $arg) {
	648	$do_carry_queries = false;
	649	} else if (false !== getFormData($arg, false)) {
	650	$one_time_carry_queries[$arg] = getFormData($arg); // Set arg to form data if available.
	651	} else if (!is_numeric($key) && '' != $arg) {
	652	$one_time_carry_queries[$key] = getFormData($key, $arg); // Set to arg to default if specified (overwritten by form data).
	653	}
	654	}
	655	} else if (false !== getFormData($carry_args, false)) {
	656	$one_time_carry_queries[$carry_args] = getFormData($carry_args);
	657	} else if (false === $carry_args) {
	658	$do_carry_queries = false;
	659	}
	660	}
[42]	661
[1]	662	// Get the first delimiter that is needed in the url.
[32]	663	$delim = strpos($url, '?') !== false ? ini_get('arg_separator.output') : '?';
	664
[42]	665
[1]	666	$q = '';
	667	if ($do_carry_queries) {
[20]	668	// Join the global _carry_queries and local one_time_carry_queries.
[136]	669	$query_args = urlEncodeArray(array_merge($this->_carry_queries, $one_time_carry_queries));
[1]	670	foreach ($query_args as $key=>$val) {
	671	// Check value is set and value does not already exist in the url.
	672	if (!preg_match('/[?&]' . preg_quote($key) . '=/', $url)) {
	673	$q .= $delim . $key . '=' . $val;
	674	$delim = ini_get('arg_separator.output');
	675	}
	676	}
	677	}
[42]	678
[1]	679	// Include the necessary SID if the following is true:
	680	// - no cookie in http request OR cookies disabled in App
	681	// - sessions are enabled
	682	// - the link stays on our site
	683	// - transparent SID propogation with session.use_trans_sid is not being used OR url begins with protocol (using_trans_sid has no effect here)
[42]	684	// OR
[1]	685	// - we must include the SID because we say so (it's used in a context where cookies will not be effective, ie. moving from http to https)
	686	// AND
	687	// - the SID is not already in the query.
	688	if (
	689	(
	690	(
	691	(
[42]	692	!isset($_COOKIE[session_name()])
[136]	693	\|\| !$this->getParam('session_use_cookies')
[42]	694	)
[136]	695	&& $this->getParam('enable_session')
[42]	696	&& isMyDomain($url)
	697	&&
[1]	698	(
[20]	699	!ini_get('session.use_trans_sid')
[1]	700	\|\| preg_match('!^(http\|https)://!i', $url)
	701	)
[42]	702	)
[1]	703	\|\| $always_include_sid
	704	)
	705	&& !preg_match('/[?&]' . preg_quote(session_name()) . '=/', $url)
	706	) {
	707	$url .= $q . $delim . session_name() . '=' . session_id();
	708	return $url;
	709	} else {
	710	$url .= $q;
	711	return $url;
	712	}
	713	}
[32]	714
	715	/**
[136]	716	* Returns a HTML-friendly URL processed with $app->url and & replaced with &
[32]	717	*
	718	* @access public
	719	* @param string $url Input URL to parse.
[136]	720	* @return string URL with $app->url() and htmlentities() applied.
[32]	721	* @author Quinn Comendant <quinn@strangecode.com>
	722	* @since 09 Dec 2005 17:58:45
	723	*/
	724	function oHREF($url, $carry_args=null, $always_include_sid=false)
	725	{
[136]	726	$url = $this->url($url, $carry_args, $always_include_sid);
[42]	727
[32]	728	// Replace any & not followed by an html or unicode entity with it's & equivalent.
	729	$url = preg_replace('/&(?![\w\d#]{1,10};)/', '&', $url);
[42]	730
[32]	731	return $url;
	732	}
[42]	733
[1]	734	/**
	735	* Prints a hidden form element with the PHPSESSID when cookies are not used, as well
[42]	736	* as hidden form elements for GET_VARS that might be in use.
[1]	737	*
	738	* @param mixed $carry_args Additional url arguments to carry in the query,
	739	* or FALSE to prevent carrying queries. Can be any of the following formats:
[32]	740	* array('key1', key2', key3') <-- to save these keys if in the form data.
	741	* array('key1'=>'value', key2'='value') <-- to set keys to default values if not present in form data.
	742	* false <-- To not carry any queries. If URL already has queries those will be retained.
[1]	743	*/
	744	function printHiddenSession($carry_args=null)
[32]	745	{
[136]	746	if (!$this->running) {
	747	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_NOTICE, __FILE__, __LINE__);
[1]	748	return false;
	749	}
[42]	750
[20]	751	// Get any provided query arguments to include in the final hidden form data.
	752	// If FALSE is a provided here, DO NOT carry the queries.
[1]	753	$do_carry_queries = true;
	754	$one_time_carry_queries = array();
	755	if (!is_null($carry_args)) {
	756	if (is_array($carry_args) && !empty($carry_args)) {
	757	foreach ($carry_args as $key=>$arg) {
	758	// Get query from appropriate source.
	759	if (false === $arg) {
	760	$do_carry_queries = false;
	761	} else if (false !== getFormData($arg, false)) {
	762	$one_time_carry_queries[$arg] = getFormData($arg); // Set arg to form data if available.
	763	} else if (!is_numeric($key) && '' != $arg) {
	764	$one_time_carry_queries[$key] = getFormData($key, $arg); // Set to arg to default if specified (overwritten by form data).
	765	}
	766	}
	767	} else if (false !== getFormData($carry_args, false)) {
	768	$one_time_carry_queries[$carry_args] = getFormData($carry_args);
	769	} else if (false === $carry_args) {
	770	$do_carry_queries = false;
	771	}
	772	}
[42]	773
[1]	774	// For each existing POST value, we create a hidden input to carry it through a form.
	775	if ($do_carry_queries) {
[20]	776	// Join the global _carry_queries and local one_time_carry_queries.
	777	// urlencode is not used here, not for form data!
[136]	778	$query_args = array_merge($this->_carry_queries, $one_time_carry_queries);
[1]	779	foreach ($query_args as $key=>$val) {
[136]	780	printf('<input type="hidden" name="%s" value="%s" />', $key, $val);
[1]	781	}
	782	}
[42]	783
[1]	784	// Include the SID if cookies are disabled.
[20]	785	if (!isset($_COOKIE[session_name()]) && !ini_get('session.use_trans_sid')) {
[136]	786	printf('<input type="hidden" name="%s" value="%s" />', session_name(), session_id());
[1]	787	}
	788	}
[42]	789
[1]	790	/**
	791	* Uses an http header to redirect the client to the given $url. If sessions are not used
	792	* and the session is not already defined in the given $url, the SID is appended as a URI query.
	793	* As with all header generating functions, make sure this is called before any other output.
	794	*
	795	* @param string $url The URL the client will be redirected to.
	796	* @param mixed $carry_args Additional url arguments to carry in the query,
	797	* or FALSE to prevent carrying queries. Can be any of the following formats:
	798	* -array('key1', key2', key3') <-- to save these keys if in the form data.
[136]	799	* -array('key1' => 'value', key2' => 'value') <-- to set keys to default values if not present in form data.
[1]	800	* -false <-- To not carry any queries. If URL already has queries those will be retained.
	801	* @param bool $always_include_sid Force session id to be added to Location header.
	802	*/
	803	function dieURL($url, $carry_args=null, $always_include_sid=false)
	804	{
[136]	805	if (!$this->running) {
	806	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_NOTICE, __FILE__, __LINE__);
[1]	807	return false;
	808	}
[42]	809
[1]	810	if ('' == $url) {
	811	// If URL is not specified, use the redirect_home_url.
[136]	812	$url = $this->getParam('redirect_home_url');
[1]	813	}
[42]	814
[1]	815	if (preg_match('!^/!', $url)) {
	816	// If relative URL is given, prepend correct local hostname.
[22]	817	$scheme = 'on' == getenv('HTTPS') ? 'https' : 'http';
	818	$host = getenv('HTTP_HOST');
	819	$url = sprintf('%s://%s%s', $scheme, $host, $url);
[1]	820	}
[22]	821
[136]	822	$url = $this->url($url, $carry_args, $always_include_sid);
[42]	823
[1]	824	header(sprintf('Location: %s', $url));
[136]	825	$this->logMsg(sprintf('dieURL: %s', $url), LOG_DEBUG, __FILE__, __LINE__);
[42]	826
[1]	827	// End this application.
	828	// Recommended, although I'm not sure it's necessary: http://cn2.php.net/session_write_close
[136]	829	$this->stop();
[1]	830	die;
	831	}
[42]	832
[84]	833	/*
[136]	834	* Redirects a user by calling $app->dieURL(). It will use:
[84]	835	* 1. the stored boomerang URL, it it exists
	836	* 2. a specified $default_url, it it exists
	837	* 3. the referring URL, it it exists.
	838	* 4. redirect_home_url configuration variable.
	839	*
	840	* @access public
	841	* @param string $id Identifier for this script.
[136]	842	* @param mixed $carry_args Additional arguments to carry in the URL automatically (see $app->oHREF()).
[84]	843	* @param string $default_url A default URL if there is not a valid specified boomerang URL.
[159]	844	* @param bool $queryless_referrer_comparison Exclude the URL query from the refererIsMe() comparison.
[84]	845	* @return bool False if the session is not running. No return otherwise.
	846	* @author Quinn Comendant <quinn@strangecode.com>
	847	* @since 31 Mar 2006 19:17:00
	848	*/
[159]	849	function dieBoomerangURL($id=null, $carry_args=null, $default_url=null, $queryless_referrer_comparison=false)
[1]	850	{
[136]	851	if (!$this->running) {
	852	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_NOTICE, __FILE__, __LINE__);
[1]	853	return false;
	854	}
[42]	855
[1]	856	// Get URL from stored boomerang. Allow non specific URL if ID not valid.
[136]	857	if ($this->validBoomerangURL($id, true)) {
[154]	858	if (isset($id) && isset($_SESSION['_app'][$this->_ns]['boomerang']['url'][$id])) {
	859	$url = $_SESSION['_app'][$this->_ns]['boomerang']['url'][$id];
[136]	860	$this->logMsg(sprintf('dieBoomerangURL(%s) found: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	861	} else {
[154]	862	$url = end($_SESSION['_app'][$this->_ns]['boomerang']['url']);
[136]	863	$this->logMsg(sprintf('dieBoomerangURL(%s) using: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	864	}
[22]	865	// Delete stored boomerang.
[136]	866	$this->deleteBoomerangURL($id);
[84]	867	} else if (isset($default_url)) {
	868	$url = $default_url;
[159]	869	} else if (!refererIsMe(true === $queryless_referrer_comparison)) {
[1]	870	// Ensure that the redirecting page is not also the referrer.
	871	$url = getenv('HTTP_REFERER');
[136]	872	$this->logMsg(sprintf('dieBoomerangURL(%s) using referrer: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	873	} else {
[22]	874	// If URL is not specified, use the redirect_home_url.
[136]	875	$url = $this->getParam('redirect_home_url');
	876	$this->logMsg(sprintf('dieBoomerangURL(%s) not found, using redirect_home_url: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	877	}
[42]	878
[84]	879	// A redirection will never happen immediately twice.
[1]	880	// Set the time so ensure this doesn't happen.
[154]	881	$_SESSION['_app'][$this->_ns]['boomerang']['time'] = time();
[136]	882	$this->dieURL($url, $carry_args);
[1]	883	}
[42]	884
[1]	885	/**
[136]	886	* Set the URL to return to when $app->dieBoomerangURL() is called.
[1]	887	*
	888	* @param string $url A fully validated URL.
	889	* @param bool $id An identification tag for this url.
	890	* FIXME: url garbage collection?
	891	*/
	892	function setBoomerangURL($url=null, $id=null)
	893	{
[136]	894	if (!$this->running) {
	895	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_NOTICE, __FILE__, __LINE__);
[1]	896	return false;
	897	}
[84]	898	// A redirection will never happen immediately after setting the boomerangURL.
[136]	899	// Set the time so ensure this doesn't happen. See $app->validBoomerangURL for more.
[42]	900
[22]	901	if ('' != $url && is_string($url)) {
[1]	902	// Delete any boomerang request keys in the query string.
[159]	903	$url = preg_replace('/[&?]?boomerang=[\w]+/', '', $url);
[42]	904
[154]	905	if (isset($_SESSION['_app'][$this->_ns]['boomerang']['url']) && is_array($_SESSION['_app'][$this->_ns]['boomerang']['url']) && !empty($_SESSION['_app'][$this->_ns]['boomerang']['url'])) {
[1]	906	// If the URL currently exists in the boomerang array, delete.
[154]	907	while ($existing_key = array_search($url, $_SESSION['_app'][$this->_ns]['boomerang']['url'])) {
	908	unset($_SESSION['_app'][$this->_ns]['boomerang']['url'][$existing_key]);
[1]	909	}
	910	}
[42]	911
[1]	912	if (isset($id)) {
[154]	913	$_SESSION['_app'][$this->_ns]['boomerang']['url'][$id] = $url;
[1]	914	} else {
[154]	915	$_SESSION['_app'][$this->_ns]['boomerang']['url'][] = $url;
[1]	916	}
[136]	917	$this->logMsg(sprintf('setBoomerangURL(%s): %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	918	return true;
	919	} else {
[136]	920	$this->logMsg(sprintf('setBoomerangURL(%s) is empty!', $id, $url), LOG_NOTICE, __FILE__, __LINE__);
[1]	921	return false;
	922	}
	923	}
[42]	924
[1]	925	/**
	926	* Return the URL set for the specified $id.
	927	*
	928	* @param string $id An identification tag for this url.
	929	*/
	930	function getBoomerangURL($id=null)
	931	{
[136]	932	if (!$this->running) {
	933	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_NOTICE, __FILE__, __LINE__);
[1]	934	return false;
	935	}
[42]	936
[1]	937	if (isset($id)) {
[154]	938	if (isset($_SESSION['_app'][$this->_ns]['boomerang']['url'][$id])) {
	939	return $_SESSION['_app'][$this->_ns]['boomerang']['url'][$id];
[1]	940	} else {
	941	return '';
	942	}
[154]	943	} else if (is_array($_SESSION['_app'][$this->_ns]['boomerang']['url'])) {
	944	return end($_SESSION['_app'][$this->_ns]['boomerang']['url']);
[1]	945	} else {
	946	return false;
	947	}
	948	}
[42]	949
[1]	950	/**
	951	* Delete the URL set for the specified $id.
	952	*
	953	* @param string $id An identification tag for this url.
	954	*/
	955	function deleteBoomerangURL($id=null)
	956	{
[136]	957	if (!$this->running) {
	958	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_NOTICE, __FILE__, __LINE__);
[1]	959	return false;
	960	}
[42]	961
[136]	962	$this->logMsg(sprintf('deleteBoomerangURL(%s): %s', $id, $this->getBoomerangURL($id)), LOG_DEBUG, __FILE__, __LINE__);
[22]	963
[154]	964	if (isset($id) && isset($_SESSION['_app'][$this->_ns]['boomerang']['url'][$id])) {
	965	unset($_SESSION['_app'][$this->_ns]['boomerang']['url'][$id]);
	966	} else if (is_array($_SESSION['_app'][$this->_ns]['boomerang']['url'])) {
	967	array_pop($_SESSION['_app'][$this->_ns]['boomerang']['url']);
[1]	968	}
	969	}
[42]	970
[1]	971	/**
[103]	972	* Check if a valid boomerang URL value has been set. A boomerang URL is considered
	973	* valid if: 1) it is not empty, 2) it is not the current URL, and 3) has not been accessed within n seconds.
[1]	974	*
[103]	975	* @return bool True if it is set and valid, false otherwise.
[1]	976	*/
	977	function validBoomerangURL($id=null, $use_nonspecificboomerang=false)
	978	{
[136]	979	if (!$this->running) {
	980	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_NOTICE, __FILE__, __LINE__);
[1]	981	return false;
	982	}
[42]	983
[154]	984	if (!isset($_SESSION['_app'][$this->_ns]['boomerang']['url'])) {
[136]	985	$this->logMsg(sprintf('validBoomerangURL(%s) no boomerang URL set.', $id), LOG_DEBUG, __FILE__, __LINE__);
[1]	986	return false;
	987	}
[42]	988
[1]	989	// Time is the timestamp of a boomerangURL redirection, or setting of a boomerangURL.
	990	// a boomerang redirection will always occur at least several seconds after the last boomerang redirect
	991	// or a boomerang being set.
[154]	992	$boomerang_time = isset($_SESSION['_app'][$this->_ns]['boomerang']['time']) ? $_SESSION['_app'][$this->_ns]['boomerang']['time'] : 0;
[42]	993
[22]	994	$url = '';
[154]	995	if (isset($id) && isset($_SESSION['_app'][$this->_ns]['boomerang']['url'][$id])) {
	996	$url = $_SESSION['_app'][$this->_ns]['boomerang']['url'][$id];
[1]	997	} else if (!isset($id) \|\| $use_nonspecificboomerang) {
	998	// Use non specific boomerang if available.
[154]	999	$url = end($_SESSION['_app'][$this->_ns]['boomerang']['url']);
[1]	1000	}
[42]	1001
[136]	1002	$this->logMsg(sprintf('validBoomerangURL(%s) testing: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[22]	1003
	1004	if ('' == $url) {
[136]	1005	$this->logMsg(sprintf('validBoomerangURL(%s) not valid, empty!', $id), LOG_DEBUG, __FILE__, __LINE__);
[1]	1006	return false;
	1007	}
	1008	if ($url == absoluteMe()) {
	1009	// The URL we are directing to is the current page.
[136]	1010	$this->logMsg(sprintf('validBoomerangURL(%s) not valid, same as absoluteMe: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	1011	return false;
	1012	}
	1013	if ($boomerang_time >= (time() - 2)) {
[159]	1014	// Last boomerang direction was less than 2 seconds ago.
	1015	$this->logMsg(sprintf('validBoomerangURL(%s) not valid, boomerang_time too short: %s seconds', $id, time() - $boomerang_time), LOG_DEBUG, __FILE__, __LINE__);
[1]	1016	return false;
	1017	}
[42]	1018
[136]	1019	$this->logMsg(sprintf('validBoomerangURL(%s) is valid: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	1020	return true;
	1021	}
	1022
	1023	/**
	1024	* Force the user to connect via https (port 443) by redirecting them to
	1025	* the same page but with https.
	1026	*/
	1027	function sslOn()
	1028	{
[38]	1029	if (function_exists('apache_get_modules')) {
[42]	1030	$modules = apache_get_modules();
[38]	1031	} else {
	1032	// It's safe to assume we have mod_ssl if we can't determine otherwise.
	1033	$modules = array('mod_ssl');
	1034	}
[42]	1035
[136]	1036	if ('' == getenv('HTTPS') && $this->getParam('ssl_enabled') && in_array('mod_ssl', $modules)) {
	1037	$this->raiseMsg(sprintf(_("Secure SSL connection made to %s"), $this->getParam('ssl_domain')), MSG_NOTICE, __FILE__, __LINE__);
[1]	1038	// Always append session because some browsers do not send cookie when crossing to SSL URL.
[136]	1039	$this->dieURL('https://' . $this->getParam('ssl_domain') . getenv('REQUEST_URI'), null, true);
[1]	1040	}
	1041	}
[42]	1042
	1043
[1]	1044	/**
	1045	* to enforce the user to connect via http (port 80) by redirecting them to
	1046	* a http version of the current url.
	1047	*/
	1048	function sslOff()
	1049	{
[53]	1050	if ('' != getenv('HTTPS')) {
[1]	1051	$this->dieURL('http://' . getenv('HTTP_HOST') . getenv('REQUEST_URI'), null, true);
	1052	}
	1053	}
	1054
[42]	1055
[1]	1056	} // End.
	1057
	1058	?>

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