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source: trunk/lib/App.inc.php @ 106

Last change on this file since 106 was 106, checked in by scdev, 18 years ago
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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>
[106]	9	* @version 2.0
[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);
[1]	18
	19	require_once dirname(__FILE__) . '/Utilities.inc.php';
	20
	21	class App {
[42]	22
[1]	23	// Name of this application.
	24	var $app = '_app_';
	25
	26	// If App::start has run successfully.
	27	var $running = false;
	28
	29	// Instance of database object.
	30	var $db;
[42]	31
[20]	32	// Array of query arguments will be carried persistently between requests.
	33	var $_carry_queries = array();
[1]	34
	35	// Hash of global application parameters.
	36	var $_params = array();
	37
	38	// Default parameters.
	39	var $_param_defaults = array(
	40
	41	// Public name and email address for this application.
	42	'site_name' => null,
	43	'site_email' => null,
[39]	44	'site_url' => '', // URL automatically determined by _SERVER['HTTP_HOST'] if not set here.
[1]	45
	46	// The location the user will go if the system doesn't knew where else to send them.
	47	'redirect_home_url' => '/',
[42]	48
[1]	49	// SSL URL used when redirecting with App::sslOn().
	50	'ssl_domain' => null,
	51	'ssl_enabled' => false,
[42]	52
[20]	53	// Character set for page output. Used in the Content-Type header and the HTML <meta content-type> tag.
[1]	54	'character_set' => 'utf-8',
	55
	56	// Human-readable format used to display dates.
	57	'date_format' => 'd M Y',
[101]	58	'time_format' => 'h:i:s A',
[1]	59	'sql_date_format' => '%e %b %Y',
	60	'sql_time_format' => '%k:%i',
	61
	62	// Use php sessions?
	63	'enable_session' => false,
	64	'session_name' => 'Strangecode',
	65	'session_use_cookies' => true,
[42]	66
[1]	67	// Use database?
	68	'enable_db' => false,
	69
	70	// Use db-based sessions?
	71	'enable_db_session_handler' => false,
[42]	72
[1]	73	// DB passwords should be set as apache environment variables in httpd.conf, readable only by root.
	74	'db_server' => 'localhost',
	75	'db_name' => null,
	76	'db_user' => null,
	77	'db_pass' => null,
	78
	79	// Database debugging.
	80	'db_always_debug' => false, // TRUE = display all SQL queries.
	81	'db_debug' => false, // TRUE = display db errors.
	82	'db_die_on_failure' => false, // TRUE = script stops on db error.
[42]	83
[1]	84	// For classes that require db tables, do we check that a table exists and create if missing?
[32]	85	'db_create_tables' => true,
[1]	86
	87	// The level of error reporting. Don't set this to 0 to suppress messages, instead use display_errors to control display.
	88	'error_reporting' => E_ALL,
	89
	90	// Don't display errors by default; it is preferable to log them to a file.
	91	'display_errors' => false,
[42]	92
[1]	93	// Directory in which to store log files.
[19]	94	'log_directory' => '',
[1]	95
	96	// PHP error log.
	97	'php_error_log' => 'php_error_log',
	98
	99	// General application log.
	100	'log_filename' => 'app_error_log',
	101
	102	// Logging priority can be any of the following, or false to deactivate:
	103	// LOG_EMERG system is unusable
	104	// LOG_ALERT action must be taken immediately
	105	// LOG_CRIT critical conditions
	106	// LOG_ERR error conditions
	107	// LOG_WARNING warning conditions
	108	// LOG_NOTICE normal, but significant, condition
	109	// LOG_INFO informational message
	110	// LOG_DEBUG debug-level message
	111	'log_file_priority' => false,
	112	'log_email_priority' => false,
	113	'log_sms_priority' => false,
	114	'log_screen_priority' => false,
[42]	115
[1]	116	// Email address to receive log event emails.
	117	'log_to_email_address' => null,
[42]	118
[19]	119	// SMS Email address to receive log event SMS messages.
[1]	120	'log_to_sms_address' => null,
[42]	121
[19]	122	// A key for calculating simple cryptographic signatures. Set using as an environment variables in the httpd.conf with 'SetEnv SIGNING_KEY <key>'.
[1]	123	'signing_key' => 'aae6abd6209d82a691a9f96384a7634a',
	124	);
[42]	125
[1]	126	/**
	127	* This method enforces the singleton pattern for this class. Only one application is running at a time.
	128	*
	129	* @return object Reference to the global SessionCache object.
	130	* @access public
	131	* @static
	132	*/
	133	function &getInstance($app=null)
	134	{
	135	static $instance = null;
	136
	137	if ($instance === null) {
	138	$instance = new App($app);
	139	}
	140
	141	return $instance;
	142	}
[42]	143
[1]	144	/**
	145	* Constructor.
	146	*/
	147	function App($app=null)
	148	{
	149	if (isset($app)) {
	150	$this->app .= $app;
	151	}
[42]	152
[1]	153	// Initialize default parameters.
	154	$this->_params = array_merge($this->_params, $this->_param_defaults);
	155	}
	156
	157	/**
	158	* Set (or overwrite existing) parameters by passing an array of new parameters.
	159	*
	160	* @access public
	161	* @param array $param Array of parameters (key => val pairs).
	162	*/
	163	function setParam($param=null)
	164	{
[53]	165	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	166	$this =& App::getInstance();
	167	}
	168
	169	if (isset($param) && is_array($param)) {
	170	// Merge new parameters with old overriding only those passed.
	171	$this->_params = array_merge($this->_params, $param);
	172	}
	173	}
	174
	175	/**
	176	* Return the value of a parameter.
	177	*
	178	* @access public
	179	* @param string $param The key of the parameter to return.
	180	* @return mixed Parameter value, or null if not existing.
	181	*/
	182	function &getParam($param=null)
	183	{
[53]	184	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	185	$this =& App::getInstance();
	186	}
[42]	187
[1]	188	if ($param === null) {
	189	return $this->_params;
	190	} else if (isset($this->_params[$param])) {
	191	return $this->_params[$param];
	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
[1]	240	// The only instance of the DB object.
	241	require_once dirname(__FILE__) . '/DB.inc.php';
[42]	242
[1]	243	$this->db =& DB::getInstance();
[42]	244
[1]	245	$this->db->setParam(array(
	246	'db_server' => $this->getParam('db_server'),
	247	'db_name' => $this->getParam('db_name'),
	248	'db_user' => $this->getParam('db_user'),
	249	'db_pass' => $this->getParam('db_pass'),
	250	'db_always_debug' => $this->getParam('db_always_debug'),
	251	'db_debug' => $this->getParam('db_debug'),
	252	'db_die_on_failure' => $this->getParam('db_die_on_failure'),
	253	));
	254
	255	// Connect to database.
	256	$this->db->connect();
	257	}
[42]	258
	259
[1]	260	/**
	261	* 2. Start PHP session.
	262	*/
[42]	263
[1]	264	// Skip session for some user agents.
	265	if (preg_match('/Atomz\|ApacheBench\|Wget/i', getenv('HTTP_USER_AGENT'))) {
	266	$this->setParam(array('enable_session' => false));
	267	}
[42]	268
[1]	269	if (true === $this->getParam('enable_session')) {
[42]	270
[1]	271	// Set the session ID to one provided in GET/POST. This is necessary for linking
	272	// between domains and keeping the same session.
	273	if ($ses = getFormData($this->getParam('session_name'), false)) {
	274	session_id($ses);
	275	}
[42]	276
[1]	277	if (true === $this->getParam('enable_db_session_handler') && true === $this->getParam('enable_db')) {
	278	// Database session handling.
	279	require_once dirname(__FILE__) . '/DBSessionHandler.inc.php';
	280	$db_save_handler = new DBSessionHandler($this->db, array(
	281	'db_table' => 'session_tbl',
	282	'create_table' => $this->getParam('db_create_tables'),
	283	));
	284	}
[42]	285
[1]	286	// Session parameters.
	287	ini_set('session.use_cookies', $this->getParam('session_use_cookies'));
	288	ini_set('session.use_trans_sid', false);
	289	ini_set('session.entropy_file', '/dev/urandom');
	290	ini_set('session.entropy_length', '512');
	291	session_name($this->getParam('session_name'));
[42]	292
[22]	293	// Start the session.
[1]	294	session_start();
[42]	295
[22]	296	if (!isset($_SESSION[$this->app])) {
	297	// Access session data using: $_SESSION['...'].
	298	// Initialize here _after_ session has started.
	299	$_SESSION[$this->app] = array(
	300	'messages' => array(),
	301	'boomerang' => array('url'),
	302	);
	303	}
[1]	304	}
[42]	305
	306
[1]	307	/**
	308	* 3. Misc setup.
	309	*/
	310
	311	// Script URI will be something like http://host.name.tld (no ending slash)
	312	// and is used whenever a URL need be used to the current site.
	313	// Not available on cli scripts obviously.
[41]	314	if (isset($_SERVER['HTTP_HOST']) && '' != $_SERVER['HTTP_HOST'] && '' == $this->getParam('site_url')) {
[14]	315	$this->setParam(array('site_url' => sprintf('%s://%s', ('on' == getenv('HTTPS') ? 'https' : 'http'), getenv('HTTP_HOST'))));
[1]	316	}
	317
	318	// A key for calculating simple cryptographic signatures.
	319	if (isset($_SERVER['SIGNING_KEY'])) {
	320	$this->setParam(array('signing_key' => $_SERVER['SIGNING_KEY']));
	321	}
[42]	322
[1]	323	// Character set. This should also be printed in the html header template.
	324	header('Content-type: text/html; charset=' . $this->getParam('character_set'));
[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;
[103]	341	if (true === $this->getParam('enable_db')) {
	342	$this->db->close();
	343	}
[1]	344	}
[42]	345
	346
[1]	347	/**
[84]	348	* Add a message to the session, which is printed in the header.
[1]	349	* Just a simple way to print messages to the user.
	350	*
	351	* @access public
	352	*
	353	* @param string $message The text description of the message.
	354	* @param int $type The type of message: MSG_NOTICE,
	355	* MSG_SUCCESS, MSG_WARNING, or MSG_ERR.
	356	* @param string $file __FILE__.
	357	* @param string $line __LINE__.
	358	*/
	359	function raiseMsg($message, $type=MSG_NOTICE, $file=null, $line=null)
	360	{
[53]	361	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	362	$this =& App::getInstance();
	363	}
[42]	364
[32]	365	$message = trim($message);
[1]	366
[32]	367	if (!$this->running \|\| '' == $message) {
[103]	368	$this->logMsg(sprintf('Canceled method call %s, application not running or message is an empty string.', __FUNCTION__), LOG_DEBUG, __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);
	374	$_SESSION[$this->app]['messages'][$msg_id] = array(
[42]	375	'type' => $type,
[1]	376	'message' => $message,
	377	'file' => $file,
[44]	378	'line' => $line,
	379	'count' => (isset($_SESSION[$this->app]['messages'][$msg_id]['count']) ? (1 + $_SESSION[$this->app]['messages'][$msg_id]['count']) : 1)
[1]	380	);
[42]	381
[1]	382	if (!in_array($type, array(MSG_NOTICE, MSG_SUCCESS, MSG_WARNING, MSG_ERR))) {
[42]	383	$this->logMsg(sprintf('Invalid MSG_* type: %s', $type), LOG_DEBUG, __FILE__, __LINE__);
[1]	384	}
	385	}
[46]	386
	387	/**
	388	* Returns an array of the raised messages.
	389	*
	390	* @access public
	391	* @return array List of messags in FIFO order.
	392	* @author Quinn Comendant <quinn@strangecode.com>
	393	* @since 21 Dec 2005 13:09:20
	394	*/
	395	function getRaisedMessages()
	396	{
[53]	397	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[46]	398	$this =& App::getInstance();
	399	}
[42]	400
[46]	401	if (!$this->running) {
[103]	402	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_DEBUG, __FILE__, __LINE__);
[46]	403	return false;
	404	}
	405
	406	$output = array();
	407	while (isset($_SESSION[$this->app]['messages']) && $message = array_shift($_SESSION[$this->app]['messages'])) {
	408	$output[] = $message;
	409	}
	410	return $output;
	411	}
	412
[1]	413	/**
[46]	414	* Resets the message list.
	415	*
	416	* @access public
	417	* @author Quinn Comendant <quinn@strangecode.com>
	418	* @since 21 Dec 2005 13:21:54
	419	*/
	420	function clearRaisedMessages()
	421	{
[53]	422	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[46]	423	$this =& App::getInstance();
	424	}
	425
	426	if (!$this->running) {
[103]	427	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_DEBUG, __FILE__, __LINE__);
[46]	428	return false;
	429	}
	430
	431	$_SESSION[$this->app]['messages'] = array();
	432	}
	433
	434	/**
[1]	435	* Prints the HTML for displaying raised messages.
	436	*
	437	* @access public
	438	* @author Quinn Comendant <quinn@strangecode.com>
	439	* @since 15 Jul 2005 01:39:14
	440	*/
	441	function printRaisedMessages()
	442	{
[53]	443	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	444	$this =& App::getInstance();
	445	}
	446
	447	if (!$this->running) {
[103]	448	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_DEBUG, __FILE__, __LINE__);
[1]	449	return false;
	450	}
	451
	452	while (isset($_SESSION[$this->app]['messages']) && $message = array_shift($_SESSION[$this->app]['messages'])) {
[106]	453	?><div class="sc-msg"><?php
[1]	454	if (error_reporting() > 0 && $this->getParam('display_errors')) {
	455	echo "\n<!-- [" . $message['file'] . ' : ' . $message['line'] . '] -->';
	456	}
	457	switch ($message['type']) {
	458	case MSG_ERR:
[106]	459	echo '<div class="sc-msg-error">' . $message['message'] . '</div>';
[1]	460	break;
[42]	461
[1]	462	case MSG_WARNING:
[106]	463	echo '<div class="sc-msg-warning">' . $message['message'] . '</div>';
[1]	464	break;
[42]	465
[1]	466	case MSG_SUCCESS:
[106]	467	echo '<div class="sc-msg-success">' . $message['message'] . '</div>';
[1]	468	break;
[42]	469
[1]	470	case MSG_NOTICE:
	471	default:
[106]	472	echo '<div class="sc-msg-notice">' . $message['message'] . '</div>';
[1]	473	break;
[42]	474
[1]	475	}
	476	?></div><?php
	477	}
	478	}
[42]	479
[1]	480	/**
[44]	481	* Logs messages to defined channels: file, email, sms, and screen. Repeated messages are
	482	* not repeated but printed once with count.
[1]	483	*
	484	* @access public
	485	* @param string $message The text description of the message.
	486	* @param int $priority The type of message priority (in descending order):
	487	* LOG_EMERG system is unusable
	488	* LOG_ALERT action must be taken immediately
	489	* LOG_CRIT critical conditions
	490	* LOG_ERR error conditions
	491	* LOG_WARNING warning conditions
	492	* LOG_NOTICE normal, but significant, condition
	493	* LOG_INFO informational message
	494	* LOG_DEBUG debug-level message
	495	* @param string $file The file where the log event occurs.
	496	* @param string $line The line of the file where the log event occurs.
	497	*/
	498	function logMsg($message, $priority=LOG_INFO, $file=null, $line=null)
	499	{
[44]	500	static $previous_events = array();
	501
[53]	502	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	503	$this =& App::getInstance();
	504	}
[42]	505
[1]	506	// If priority is not specified, assume the worst.
	507	if (!$this->logPriorityToString($priority)) {
	508	$this->logMsg(sprintf('Log priority %s not defined. (Message: %s)', $priority, $message), LOG_EMERG, $file, $line);
	509	$priority = LOG_EMERG;
	510	}
[42]	511
[15]	512	// If log file is not specified, don't log to a file.
	513	if (!$this->getParam('log_directory') \|\| !$this->getParam('log_filename') \|\| !is_dir($this->getParam('log_directory')) \|\| !is_writable($this->getParam('log_directory'))) {
[1]	514	$this->setParam(array('log_file_priority' => false));
[15]	515	// We must use trigger_error to report this problem rather than calling App::logMsg, which might lead to an infinite loop.
[1]	516	trigger_error(sprintf('Codebase error: log directory (%s) not found or writable.', $this->getParam('log_directory')), E_USER_NOTICE);
	517	}
[42]	518
[1]	519	// Make sure to log in the system's locale.
	520	$locale = setlocale(LC_TIME, 0);
	521	setlocale(LC_TIME, 'C');
[42]	522
[44]	523	// Strip HTML tags except any with more than 7 characters because that's probably not a HTML tag, e.g. <email@address.com>.
	524	preg_match_all('/(<[^>\s]{7,})[^>]*>/', $message, $strip_tags_allow);
	525	$message = strip_tags(preg_replace('/\s+/', ' ', $message), (!empty($strip_tags_allow[1]) ? join('> ', $strip_tags_allow[1]) . '>' : null));
	526
	527	// Store this event under a unique key, counting each time it occurs so that it only gets reported a limited number of times.
	528	$msg_id = md5($message . $priority . $file . $line);
	529	if (isset($previous_events[$msg_id])) {
	530	$previous_events[$msg_id]++;
	531	if ($previous_events[$msg_id] == 2) {
[71]	532	$this->logMsg(sprintf('%s (Event repeated %s or more times)', $message, $previous_events[$msg_id]), $priority, $file, $line);
[44]	533	}
	534	return false;
	535	} else {
	536	$previous_events[$msg_id] = 1;
	537	}
	538
[1]	539	// Data to be stored for a log event.
[44]	540	$event = array(
	541	'date' => date('Y-m-d H:i:s'),
	542	'remote ip' => getRemoteAddr(),
	543	'pid' => (substr(PHP_OS, 0, 3) != 'WIN' ? posix_getpid() : ''),
	544	'type' => $this->logPriorityToString($priority),
	545	'file:line' => "$file : $line",
[55]	546	'url' => (isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : ''),
[44]	547	'message' => $message
	548	);
[42]	549
[1]	550	// FILE ACTION
	551	if ($this->getParam('log_file_priority') && $priority <= $this->getParam('log_file_priority')) {
[44]	552	$event_str = '[' . join('] [', $event) . ']';
[1]	553	error_log($event_str . "\n", 3, $this->getParam('log_directory') . '/' . $this->getParam('log_filename'));
	554	}
[42]	555
[1]	556	// EMAIL ACTION
	557	if ($this->getParam('log_email_priority') && $priority <= $this->getParam('log_email_priority')) {
	558	$subject = sprintf('[%s %s] %s', getenv('HTTP_HOST'), $event['type'], $message);
	559	$email_msg = sprintf("A %s log event occured on %s\n\n", $event['type'], getenv('HTTP_HOST'));
[41]	560	$headers = "From: codebase@strangecode.com";
[1]	561	foreach ($event as $k=>$v) {
	562	$email_msg .= sprintf("%-11s%s\n", $k, $v);
	563	}
	564	mail($this->getParam('log_to_email_address'), $subject, $email_msg, $headers, '-f codebase@strangecode.com');
	565	}
[42]	566
[1]	567	// SMS ACTION
	568	if ($this->getParam('log_sms_priority') && $priority <= $this->getParam('log_sms_priority')) {
	569	$subject = sprintf('[%s %s]', getenv('HTTP_HOST'), $priority);
[41]	570	$sms_msg = sprintf('%s [%s:%s]', $event['message'], basename($file), $line);
	571	$headers = "From: codebase@strangecode.com";
[1]	572	mail($this->getParam('log_to_sms_address'), $subject, $sms_msg, $headers, '-f codebase@strangecode.com');
	573	}
[42]	574
[1]	575	// SCREEN ACTION
	576	if ($this->getParam('log_screen_priority') && $priority <= $this->getParam('log_screen_priority')) {
	577	echo "[{$event['date']}] [{$event['type']}] [{$event['file:line']}] [{$event['message']}]\n";
	578	}
[42]	579
[1]	580	// Restore original locale.
	581	setlocale(LC_TIME, $locale);
	582	}
[42]	583
[1]	584	/**
	585	* Returns the string representation of a LOG_* integer constant.
	586	*
	587	* @param int $priority The LOG_* integer constant.
	588	*
	589	* @return The string representation of $priority.
	590	*/
	591	function logPriorityToString ($priority) {
	592	$priorities = array(
	593	LOG_EMERG => 'emergency',
	594	LOG_ALERT => 'alert',
	595	LOG_CRIT => 'critical',
	596	LOG_ERR => 'error',
	597	LOG_WARNING => 'warning',
	598	LOG_NOTICE => 'notice',
	599	LOG_INFO => 'info',
	600	LOG_DEBUG => 'debug'
	601	);
	602	if (isset($priorities[$priority])) {
	603	return $priorities[$priority];
	604	} else {
	605	return false;
	606	}
	607	}
[42]	608
[1]	609	/**
[20]	610	* Sets which query arguments will be carried persistently between requests.
[42]	611	* Values in the _carry_queries array will be copied to URLs (via App::url()) and
[20]	612	* to hidden input values (via printHiddenSession()).
	613	*
	614	* @access public
[42]	615	* @param string $query_key The key of the query argument to save.
[20]	616	* @author Quinn Comendant <quinn@strangecode.com>
	617	* @since 14 Nov 2005 19:24:52
	618	*/
	619	function carryQuery($query_key)
	620	{
[53]	621	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[20]	622	$this =& App::getInstance();
	623	}
[42]	624
[20]	625	// If not already set, and there is a non-empty value provided in the request...
	626	if (!isset($this->_carry_queries[$query_key]) && getFormData($query_key, false)) {
	627	// Copy the value of the specified query argument into the _carry_queries array.
[42]	628	$this->_carry_queries[$query_key] = getFormData($query_key);
[20]	629	}
	630	}
[42]	631
[20]	632	/**
[1]	633	* Outputs a fully qualified URL with a query of all the used (ie: not empty)
[42]	634	* keys and values, including optional queries. This allows mindless retention
[32]	635	* of query arguments across page requests. If cookies are not
[1]	636	* used, the session id will be propogated in the URL.
	637	*
[32]	638	* @param string $url The initial url
	639	* @param mixed $carry_args Additional url arguments to carry in the query,
	640	* or FALSE to prevent carrying queries. Can be any of the following formats:
	641	* array('key1', key2', key3') <-- to save these keys if in the form data.
	642	* array('key1'=>'value', key2'='value') <-- to set keys to default values if not present in form data.
	643	* false <-- To not carry any queries. If URL already has queries those will be retained.
[1]	644	*
	645	* @param mixed $always_include_sid Always add the session id, even if using_trans_sid = true. This is required when
	646	* URL starts with http, since PHP using_trans_sid doesn't do those and also for
	647	* header('Location...') redirections.
	648	*
	649	* @return string url with attached queries and, if not using cookies, the session id
	650	*/
[32]	651	function url($url, $carry_args=null, $always_include_sid=false)
[1]	652	{
[53]	653	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	654	$this =& App::getInstance();
	655	}
	656
	657	if (!$this->running) {
[103]	658	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_DEBUG, __FILE__, __LINE__);
[1]	659	return false;
	660	}
[42]	661
[20]	662	// Get any provided query arguments to include in the final URL.
	663	// If FALSE is a provided here, DO NOT carry the queries.
[1]	664	$do_carry_queries = true;
	665	$one_time_carry_queries = array();
	666	if (!is_null($carry_args)) {
	667	if (is_array($carry_args) && !empty($carry_args)) {
	668	foreach ($carry_args as $key=>$arg) {
	669	// Get query from appropriate source.
	670	if (false === $arg) {
	671	$do_carry_queries = false;
	672	} else if (false !== getFormData($arg, false)) {
	673	$one_time_carry_queries[$arg] = getFormData($arg); // Set arg to form data if available.
	674	} else if (!is_numeric($key) && '' != $arg) {
	675	$one_time_carry_queries[$key] = getFormData($key, $arg); // Set to arg to default if specified (overwritten by form data).
	676	}
	677	}
	678	} else if (false !== getFormData($carry_args, false)) {
	679	$one_time_carry_queries[$carry_args] = getFormData($carry_args);
	680	} else if (false === $carry_args) {
	681	$do_carry_queries = false;
	682	}
	683	}
[42]	684
[1]	685	// Get the first delimiter that is needed in the url.
[32]	686	$delim = strpos($url, '?') !== false ? ini_get('arg_separator.output') : '?';
	687
[42]	688
[1]	689	$q = '';
	690	if ($do_carry_queries) {
[20]	691	// Join the global _carry_queries and local one_time_carry_queries.
	692	$query_args = urlEncodeArray(array_merge($this->_carry_queries, $one_time_carry_queries));
[1]	693	foreach ($query_args as $key=>$val) {
	694	// Check value is set and value does not already exist in the url.
	695	if (!preg_match('/[?&]' . preg_quote($key) . '=/', $url)) {
	696	$q .= $delim . $key . '=' . $val;
	697	$delim = ini_get('arg_separator.output');
	698	}
	699	}
	700	}
[42]	701
[1]	702	// Include the necessary SID if the following is true:
	703	// - no cookie in http request OR cookies disabled in App
	704	// - sessions are enabled
	705	// - the link stays on our site
	706	// - transparent SID propogation with session.use_trans_sid is not being used OR url begins with protocol (using_trans_sid has no effect here)
[42]	707	// OR
[1]	708	// - we must include the SID because we say so (it's used in a context where cookies will not be effective, ie. moving from http to https)
	709	// AND
	710	// - the SID is not already in the query.
	711	if (
	712	(
	713	(
	714	(
[42]	715	!isset($_COOKIE[session_name()])
[1]	716	\|\| !$this->getParam('session_use_cookies')
[42]	717	)
[1]	718	&& $this->getParam('enable_session')
[42]	719	&& isMyDomain($url)
	720	&&
[1]	721	(
[20]	722	!ini_get('session.use_trans_sid')
[1]	723	\|\| preg_match('!^(http\|https)://!i', $url)
	724	)
[42]	725	)
[1]	726	\|\| $always_include_sid
	727	)
	728	&& !preg_match('/[?&]' . preg_quote(session_name()) . '=/', $url)
	729	) {
	730	$url .= $q . $delim . session_name() . '=' . session_id();
	731	return $url;
	732	} else {
	733	$url .= $q;
	734	return $url;
	735	}
	736	}
[32]	737
	738	/**
	739	* Returns a HTML-friendly URL processed with App::url and & replaced with &
	740	*
	741	* @access public
	742	* @param string $url Input URL to parse.
	743	* @return string URL with App::url() and htmlentities() applied.
	744	* @author Quinn Comendant <quinn@strangecode.com>
	745	* @since 09 Dec 2005 17:58:45
	746	*/
	747	function oHREF($url, $carry_args=null, $always_include_sid=false)
	748	{
[53]	749	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[32]	750	$this =& App::getInstance();
	751	}
[42]	752
[32]	753	$url = $this->url($url, $carry_args, $always_include_sid);
[42]	754
[32]	755	// Replace any & not followed by an html or unicode entity with it's & equivalent.
	756	$url = preg_replace('/&(?![\w\d#]{1,10};)/', '&', $url);
[42]	757
[32]	758	return $url;
	759	}
[42]	760
[1]	761	/**
	762	* Prints a hidden form element with the PHPSESSID when cookies are not used, as well
[42]	763	* as hidden form elements for GET_VARS that might be in use.
[1]	764	*
	765	* @param mixed $carry_args Additional url arguments to carry in the query,
	766	* or FALSE to prevent carrying queries. Can be any of the following formats:
[32]	767	* array('key1', key2', key3') <-- to save these keys if in the form data.
	768	* array('key1'=>'value', key2'='value') <-- to set keys to default values if not present in form data.
	769	* false <-- To not carry any queries. If URL already has queries those will be retained.
[1]	770	*/
	771	function printHiddenSession($carry_args=null)
[32]	772	{
[53]	773	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	774	$this =& App::getInstance();
	775	}
	776
	777	if (!$this->running) {
[103]	778	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_DEBUG, __FILE__, __LINE__);
[1]	779	return false;
	780	}
[42]	781
[20]	782	// Get any provided query arguments to include in the final hidden form data.
	783	// If FALSE is a provided here, DO NOT carry the queries.
[1]	784	$do_carry_queries = true;
	785	$one_time_carry_queries = array();
	786	if (!is_null($carry_args)) {
	787	if (is_array($carry_args) && !empty($carry_args)) {
	788	foreach ($carry_args as $key=>$arg) {
	789	// Get query from appropriate source.
	790	if (false === $arg) {
	791	$do_carry_queries = false;
	792	} else if (false !== getFormData($arg, false)) {
	793	$one_time_carry_queries[$arg] = getFormData($arg); // Set arg to form data if available.
	794	} else if (!is_numeric($key) && '' != $arg) {
	795	$one_time_carry_queries[$key] = getFormData($key, $arg); // Set to arg to default if specified (overwritten by form data).
	796	}
	797	}
	798	} else if (false !== getFormData($carry_args, false)) {
	799	$one_time_carry_queries[$carry_args] = getFormData($carry_args);
	800	} else if (false === $carry_args) {
	801	$do_carry_queries = false;
	802	}
	803	}
[42]	804
[1]	805	// For each existing POST value, we create a hidden input to carry it through a form.
	806	if ($do_carry_queries) {
[20]	807	// Join the global _carry_queries and local one_time_carry_queries.
	808	// urlencode is not used here, not for form data!
	809	$query_args = array_merge($this->_carry_queries, $one_time_carry_queries);
[1]	810	foreach ($query_args as $key=>$val) {
	811	echo '<input type="hidden" name="' . $key . '" value="' . $val . '" />';
	812	}
	813	}
[42]	814
[1]	815	// Include the SID if cookies are disabled.
[20]	816	if (!isset($_COOKIE[session_name()]) && !ini_get('session.use_trans_sid')) {
[1]	817	echo '<input type="hidden" name="' . session_name() . '" value="' . session_id() . '" />';
	818	}
	819	}
[42]	820
[1]	821	/**
	822	* Uses an http header to redirect the client to the given $url. If sessions are not used
	823	* and the session is not already defined in the given $url, the SID is appended as a URI query.
	824	* As with all header generating functions, make sure this is called before any other output.
	825	*
	826	* @param string $url The URL the client will be redirected to.
	827	* @param mixed $carry_args Additional url arguments to carry in the query,
	828	* or FALSE to prevent carrying queries. Can be any of the following formats:
	829	* -array('key1', key2', key3') <-- to save these keys if in the form data.
	830	* -array('key1'=>'value', key2'='value') <-- to set keys to default values if not present in form data.
	831	* -false <-- To not carry any queries. If URL already has queries those will be retained.
	832	* @param bool $always_include_sid Force session id to be added to Location header.
	833	*/
	834	function dieURL($url, $carry_args=null, $always_include_sid=false)
	835	{
[53]	836	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	837	$this =& App::getInstance();
	838	}
	839
	840	if (!$this->running) {
[103]	841	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_DEBUG, __FILE__, __LINE__);
[1]	842	return false;
	843	}
[42]	844
[1]	845	if ('' == $url) {
	846	// If URL is not specified, use the redirect_home_url.
	847	$url = $this->getParam('redirect_home_url');
	848	}
[42]	849
[1]	850	if (preg_match('!^/!', $url)) {
	851	// If relative URL is given, prepend correct local hostname.
[22]	852	$scheme = 'on' == getenv('HTTPS') ? 'https' : 'http';
	853	$host = getenv('HTTP_HOST');
	854	$url = sprintf('%s://%s%s', $scheme, $host, $url);
[1]	855	}
[22]	856
[32]	857	$url = $this->url($url, $carry_args, $always_include_sid);
[42]	858
[1]	859	header(sprintf('Location: %s', $url));
	860	$this->logMsg(sprintf('dieURL: %s', $url), LOG_DEBUG, __FILE__, __LINE__);
[42]	861
[1]	862	// End this application.
	863	// Recommended, although I'm not sure it's necessary: http://cn2.php.net/session_write_close
	864	$this->stop();
	865	die;
	866	}
[42]	867
[84]	868	/*
	869	* Redirects a user by calling App::dieURL(). It will use:
	870	* 1. the stored boomerang URL, it it exists
	871	* 2. a specified $default_url, it it exists
	872	* 3. the referring URL, it it exists.
	873	* 4. redirect_home_url configuration variable.
	874	*
	875	* @access public
	876	* @param string $id Identifier for this script.
	877	* @param mixed $carry_args Additional arguments to carry in the URL automatically (see App::oHREF()).
	878	* @param string $default_url A default URL if there is not a valid specified boomerang URL.
	879	* @return bool False if the session is not running. No return otherwise.
	880	* @author Quinn Comendant <quinn@strangecode.com>
	881	* @since 31 Mar 2006 19:17:00
	882	*/
	883	function dieBoomerangURL($id=null, $carry_args=null, $default_url=null)
[1]	884	{
[53]	885	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	886	$this =& App::getInstance();
	887	}
	888
	889	if (!$this->running) {
[103]	890	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_DEBUG, __FILE__, __LINE__);
[1]	891	return false;
	892	}
[42]	893
[1]	894	// Get URL from stored boomerang. Allow non specific URL if ID not valid.
	895	if ($this->validBoomerangURL($id, true)) {
	896	if (isset($id) && isset($_SESSION[$this->app]['boomerang']['url'][$id])) {
	897	$url = $_SESSION[$this->app]['boomerang']['url'][$id];
[22]	898	$this->logMsg(sprintf('dieBoomerangURL(%s) found: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	899	} else {
	900	$url = end($_SESSION[$this->app]['boomerang']['url']);
[22]	901	$this->logMsg(sprintf('dieBoomerangURL(%s) using: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	902	}
[22]	903	// Delete stored boomerang.
	904	$this->deleteBoomerangURL($id);
[84]	905	} else if (isset($default_url)) {
	906	$url = $default_url;
[22]	907	} else if (!refererIsMe()) {
[1]	908	// Ensure that the redirecting page is not also the referrer.
	909	$url = getenv('HTTP_REFERER');
[22]	910	$this->logMsg(sprintf('dieBoomerangURL(%s) using referrer: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	911	} else {
[22]	912	// If URL is not specified, use the redirect_home_url.
	913	$url = $this->getParam('redirect_home_url');
	914	$this->logMsg(sprintf('dieBoomerangURL(%s) not found, using redirect_home_url: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	915	}
[42]	916
[84]	917	// A redirection will never happen immediately twice.
[1]	918	// Set the time so ensure this doesn't happen.
	919	$_SESSION[$this->app]['boomerang']['time'] = time();
	920	$this->dieURL($url, $carry_args);
	921	}
[42]	922
[1]	923	/**
	924	* Set the URL to return to when App::dieBoomerangURL() is called.
	925	*
	926	* @param string $url A fully validated URL.
	927	* @param bool $id An identification tag for this url.
	928	* FIXME: url garbage collection?
	929	*/
	930	function setBoomerangURL($url=null, $id=null)
	931	{
[53]	932	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	933	$this =& App::getInstance();
	934	}
	935
	936	if (!$this->running) {
[103]	937	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_DEBUG, __FILE__, __LINE__);
[1]	938	return false;
	939	}
[84]	940	// A redirection will never happen immediately after setting the boomerangURL.
[1]	941	// Set the time so ensure this doesn't happen. See App::validBoomerangURL for more.
[42]	942
[22]	943	if ('' != $url && is_string($url)) {
[1]	944	// Delete any boomerang request keys in the query string.
	945	$url = preg_replace('/boomerang=[\w]+/', '', $url);
[42]	946
[22]	947	if (isset($_SESSION[$this->app]['boomerang']['url']) && is_array($_SESSION[$this->app]['boomerang']['url']) && !empty($_SESSION[$this->app]['boomerang']['url'])) {
[1]	948	// If the URL currently exists in the boomerang array, delete.
	949	while ($existing_key = array_search($url, $_SESSION[$this->app]['boomerang']['url'])) {
	950	unset($_SESSION[$this->app]['boomerang']['url'][$existing_key]);
	951	}
	952	}
[42]	953
[1]	954	if (isset($id)) {
	955	$_SESSION[$this->app]['boomerang']['url'][$id] = $url;
	956	} else {
	957	$_SESSION[$this->app]['boomerang']['url'][] = $url;
	958	}
[22]	959	$this->logMsg(sprintf('setBoomerangURL(%s): %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	960	return true;
	961	} else {
[22]	962	$this->logMsg(sprintf('setBoomerangURL(%s) is empty!', $id, $url), LOG_NOTICE, __FILE__, __LINE__);
[1]	963	return false;
	964	}
	965	}
[42]	966
[1]	967	/**
	968	* Return the URL set for the specified $id.
	969	*
	970	* @param string $id An identification tag for this url.
	971	*/
	972	function getBoomerangURL($id=null)
	973	{
[53]	974	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	975	$this =& App::getInstance();
	976	}
	977
	978	if (!$this->running) {
[103]	979	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_DEBUG, __FILE__, __LINE__);
[1]	980	return false;
	981	}
[42]	982
[1]	983	if (isset($id)) {
	984	if (isset($_SESSION[$this->app]['boomerang']['url'][$id])) {
	985	return $_SESSION[$this->app]['boomerang']['url'][$id];
	986	} else {
	987	return '';
	988	}
	989	} else if (is_array($_SESSION[$this->app]['boomerang']['url'])) {
	990	return end($_SESSION[$this->app]['boomerang']['url']);
	991	} else {
	992	return false;
	993	}
	994	}
[42]	995
[1]	996	/**
	997	* Delete the URL set for the specified $id.
	998	*
	999	* @param string $id An identification tag for this url.
	1000	*/
	1001	function deleteBoomerangURL($id=null)
	1002	{
[53]	1003	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	1004	$this =& App::getInstance();
	1005	}
	1006
	1007	if (!$this->running) {
[103]	1008	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_DEBUG, __FILE__, __LINE__);
[1]	1009	return false;
	1010	}
[42]	1011
[22]	1012	$this->logMsg(sprintf('deleteBoomerangURL(%s): %s', $id, $this->getBoomerangURL($id)), LOG_DEBUG, __FILE__, __LINE__);
	1013
[1]	1014	if (isset($id) && isset($_SESSION[$this->app]['boomerang']['url'][$id])) {
	1015	unset($_SESSION[$this->app]['boomerang']['url'][$id]);
	1016	} else if (is_array($_SESSION[$this->app]['boomerang']['url'])) {
	1017	array_pop($_SESSION[$this->app]['boomerang']['url']);
	1018	}
	1019	}
[42]	1020
[1]	1021	/**
[103]	1022	* Check if a valid boomerang URL value has been set. A boomerang URL is considered
	1023	* valid if: 1) it is not empty, 2) it is not the current URL, and 3) has not been accessed within n seconds.
[1]	1024	*
[103]	1025	* @return bool True if it is set and valid, false otherwise.
[1]	1026	*/
	1027	function validBoomerangURL($id=null, $use_nonspecificboomerang=false)
	1028	{
[53]	1029	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	1030	$this =& App::getInstance();
	1031	}
	1032
	1033	if (!$this->running) {
[103]	1034	$this->logMsg(sprintf('Canceled method call %s, application not running.', __FUNCTION__), LOG_DEBUG, __FILE__, __LINE__);
[1]	1035	return false;
	1036	}
[42]	1037
[1]	1038	if (!isset($_SESSION[$this->app]['boomerang']['url'])) {
[103]	1039	$this->logMsg(sprintf('validBoomerangURL(%s) no boomerang URL set.', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	1040	return false;
	1041	}
[42]	1042
[1]	1043	// Time is the timestamp of a boomerangURL redirection, or setting of a boomerangURL.
	1044	// a boomerang redirection will always occur at least several seconds after the last boomerang redirect
	1045	// or a boomerang being set.
	1046	$boomerang_time = isset($_SESSION[$this->app]['boomerang']['time']) ? $_SESSION[$this->app]['boomerang']['time'] : 0;
[42]	1047
[22]	1048	$url = '';
[1]	1049	if (isset($id) && isset($_SESSION[$this->app]['boomerang']['url'][$id])) {
	1050	$url = $_SESSION[$this->app]['boomerang']['url'][$id];
	1051	} else if (!isset($id) \|\| $use_nonspecificboomerang) {
	1052	// Use non specific boomerang if available.
	1053	$url = end($_SESSION[$this->app]['boomerang']['url']);
	1054	}
[42]	1055
[22]	1056	$this->logMsg(sprintf('validBoomerangURL(%s) testing: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
	1057
	1058	if ('' == $url) {
[53]	1059	$this->logMsg(sprintf('validBoomerangURL(%s) not valid, empty!', $id), LOG_DEBUG, __FILE__, __LINE__);
[1]	1060	return false;
	1061	}
	1062	if ($url == absoluteMe()) {
	1063	// The URL we are directing to is the current page.
[53]	1064	$this->logMsg(sprintf('validBoomerangURL(%s) not valid, same as absoluteMe: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	1065	return false;
	1066	}
	1067	if ($boomerang_time >= (time() - 2)) {
	1068	// Last boomerang direction was more than 2 seconds ago.
[53]	1069	$this->logMsg(sprintf('validBoomerangURL(%s) not valid, boomerang_time too short: %s', $id, time() - $boomerang_time), LOG_DEBUG, __FILE__, __LINE__);
[1]	1070	return false;
	1071	}
[42]	1072
[22]	1073	$this->logMsg(sprintf('validBoomerangURL(%s) is valid: %s', $id, $url), LOG_DEBUG, __FILE__, __LINE__);
[1]	1074	return true;
	1075	}
	1076
	1077	/**
	1078	* Force the user to connect via https (port 443) by redirecting them to
	1079	* the same page but with https.
	1080	*/
	1081	function sslOn()
	1082	{
[53]	1083	if (!isset($this) \|\| !is_a($this, 'App') && !is_subclass_of($this, 'App')) {
[1]	1084	$this =& App::getInstance();
	1085	}
[42]	1086
[38]	1087	if (function_exists('apache_get_modules')) {
[42]	1088	$modules = apache_get_modules();
[38]	1089	} else {
	1090	// It's safe to assume we have mod_ssl if we can't determine otherwise.
	1091	$modules = array('mod_ssl');
	1092	}
[42]	1093
[53]	1094	if ('' == getenv('HTTPS') && $this->getParam('ssl_enabled') && in_array('mod_ssl', $modules)) {
[1]	1095	$this->raiseMsg(sprintf(_("Secure SSL connection made to %s"), $this->getParam('ssl_domain')), MSG_NOTICE, __FILE__, __LINE__);
	1096	// Always append session because some browsers do not send cookie when crossing to SSL URL.
	1097	$this->dieURL('https://' . $this->getParam('ssl_domain') . getenv('REQUEST_URI'), null, true);
	1098	}
	1099	}
[42]	1100
	1101
[1]	1102	/**
	1103	* to enforce the user to connect via http (port 80) by redirecting them to
	1104	* a http version of the current url.
	1105	*/
	1106	function sslOff()
	1107	{
[53]	1108	if ('' != getenv('HTTPS')) {
[1]	1109	$this->dieURL('http://' . getenv('HTTP_HOST') . getenv('REQUEST_URI'), null, true);
	1110	}
	1111	}
	1112
[42]	1113
[1]	1114	} // End.
	1115
	1116	?>

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