summaryrefslogtreecommitdiff
path: root/framework/Web/THttpSession.php
blob: ff3af5604c302b12f78278e12a1f16526b7734e9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
<?php
/**
 * THttpSession class
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.pradosoft.com/
 * @copyright Copyright &copy; 2005 PradoSoft
 * @license http://www.pradosoft.com/license/
 * @version $Revision: $  $Date: $
 * @package System.Web
 */

/**
 * THttpSession class
 *
 * THttpSession provides session-level data management and the related configurations.
 * To start the session, call {@open}; to complete and send out session data, call {@close};
 * to destroy the session, call {@destroy}. If AutoStart is true, then the session
 * will be started once the session module is loaded and initialized.
 *
 * To access data stored in session, use the Items property. For example,
 * <code>
 *   $session=new THttpSession;
 *   $session->open();
 *   foreach($session->Items as $key=>$value)
 *       ; // read data in session
 *   $session->Items['key']=$data; // store new data into session
 * </code>
 *
 * The following configurations are available for session:
 * AutoStart, Cookie, CacheExpire, CacheLimiter, SavePath, Storage, GCProbability, CookieUsage, Timeout.
 * See the corresponding setter and getter documentation for more information.
 * Note, these properties must be set before the session is started.
 *
 * THttpSession can be inherited with customized session storage method.
 * Override {@link _open}, {@link _close}, {@link _read}, {@link _write}, {@link _destroy} and {@link _gc}
 * and set Storage as 'user' to store session using methods other than files and shared memory.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Revision: $  $Date: $
 * @package System.Web
 * @since 3.0
 */
class THttpSession extends TComponent implements IModule
{
	/**
	 * @var string ID of this module
	 */
	private $_id;
	/**
	 * @var THttpSessionCollection list of session variables
	 */
	private $_items;
	/**
	 * @var boolean whether this module has been initialized
	 */
	private $_initialized=false;
	/**
	 * @var boolean whether the session has started
	 */
	private $_started=false;
	/**
	 * @var boolean whether the session should be started when the module is initialized
	 */
	private $_autoStart=false;
	/**
	 * @var THttpCookie cookie to be used to store session ID and other data
	 */
	private $_cookie=null;

	/**
	 * Initializes the module.
	 * This method is required by IModule.
	 * If AutoStart is true, the session will be started.
	 * @param IApplication prado application instance
	 */
	public function init($application,$config)
	{
		if($this->_autoStart)
			session_start();
		$this->_initialized=true;
		$application->setSession($this);
	}

	/**
	 * Starts the session if it has not started yet.
	 */
	public function open()
	{
		if(!$this->_started)
		{
			if($this->_cookie!==null)
				session_set_cookie_params($this->_cookie->getExpire(),$this->_cookie->getPath(),$this->_cookie->getDomain(),$this->_cookie->getSecure());
			session_start();
			$this->_started=true;
		}
	}

	/**
	 * Ends the current session and store session data.
	 */
	public function close()
	{
		if($this->_started)
		{
			session_write_close();
			$this->_started=false;
		}
	}

	/**
	 * Destroys all data registered to a session.
	 */
	public function destroy()
	{
		if($this->_started)
		{
			session_destroy();
			$this->_started=false;
		}
	}

	/**
	 * @return string the ID of this session module (not session ID)
	 */
	public function getID()
	{
		return $this->_id;
	}

	/**
	 * @param string the ID of this session module (not session ID)
	 */
	public function setID($value)
	{
		$this->_id=$value;
	}

	/**
	 * @return THttpSessionCollection list of session variables
	 */
	public function getItems()
	{
		if($this->_items===null)
			$this->_items=new THttpSessionCollection($_SESSION);
		return $this->_items;
	}

	/**
	 * @return boolean whether the session has started
	 */
	public function getIsStarted()
	{
		return $this->_started;
	}

	/**
	 * @return string the current session ID
	 */
	public function getSessionID()
	{
		return session_id();
	}

	/**
	 * @param string the session ID for the current session
	 * @throws TInvalidOperationException if session is started already
	 */
	public function setSessionID($value)
	{
		if($this->_started)
			throw new TInvalidOperationException('httpsession_sessionid_unchangeable');
		else
			session_id($value);
	}

	/**
	 * @return string the current session name
	 */
	public function getSessionName()
	{
		return session_name();
	}

	/**
	 * @param string the session name for the current session, must be an alphanumeric string, defaults to PHPSESSID
	 * @throws TInvalidOperationException if session is started already
	 */
	public function setSessionName($value)
	{
		if($this->_started)
			throw new TInvalidOperationException('httpsession_sessionname_unchangeable');
		else if(ctype_alnum($value))
			session_name($value);
		else
			throw new TInvalidDataValueException('httpsession_sessionname_invalid',$name);
	}

	/**
	 * @return string the current session save path, defaults to '/tmp'.
	 */
	public function getSavePath()
	{
		return session_save_path();
	}

	/**
	 * @param string the current session save path
	 * @throws TInvalidOperationException if session is started already
	 */
	public function setSavePath($value)
	{
		if($this->_started)
			throw new TInvalidOperationException('httpsession_cachelimiter_unchangeable');
		else if(is_dir($value))
			session_save_path($value);
		else
			throw new TInvalidDataValueException('httpsession_savepath_invalid',$value);
	}

	/**
	 * @return string (files|mm|user) storage mode of session, defaults to 'files'.
	 */
	public function getStorage()
	{
		return session_module_name();
	}

	/**
	 * @param string (files|mm|user) storage mode of session. By default, the session
	 * data is stored in files. You may change to shared memory (mm) for better performance.
	 * Or you may choose your own storage (user). If you do so, make sure you
	 * override {@link _open}, {@link _close}, {@link _read}, {@link _write},
	 * {@link _destroy}, and {@link _gc}.
	 * @throws TInvalidOperationException if session is started already
	 */
	public function setStorage($value)
	{
		if($this->_started)
			throw new TInvalidOperationException('httpsession_storage_unchangeable');
		else
		{
			$value=TPropertyValue::ensureEnum($value,array('files','mm','user'));
			if($value==='user')
				session_set_save_handler(array($this,'_open'),array($this,'_close'),array($this,'_read'),array($this,'_write'),array($this,'_destroy'),array($this,'_gc'));
			session_module_name($value);
		}
	}

	/**
	 * @return THttpCookie cookie that will be used to store session ID
	 */
	public function getCookie()
	{
		if($this->_cookie===null)
			$this->_cookie=new THttpCookie($this->getSessionName(),$this->getSessionID());
		return $this->_cookie;
	}

	/**
	 * @return string (none|allow|only) how to use cookie to store session ID
	 *               'none' means not using cookie, 'allow' means using cookie, and 'only' means using cookie only, defaults to 'allow'.
	 */
	public function getCookieMode()
	{
		if(ini_get('session.use_cookies')==='0')
			return 'none';
		else if(ini_get('session.use_only_cookies')==='0')
			return 'allow';
		else
			return 'only';
	}

	/**
	 * @param string (none|allow|only) how to use cookie to store session ID
	 *               'none' means not using cookie, 'allow' means using cookie, and 'only' means using cookie only.
	 * @throws TInvalidOperationException if session is started already
	 */
	public function setCookieMode($value)
	{
		if($this->_started)
			throw new TInvalidOperationException('httpsession_cookiemode_unchangeable');
		else
		{
			$value=TPropertyValue::ensureEnum($value,array('none','allow','only'));
			if($value==='none')
				ini_set('session.use_cookies','0');
			else if($value==='allow')
			{
				ini_set('session.use_cookies','1');
				ini_set('session.use_only_cookies','0');
			}
			else
			{
				ini_set('session.use_cookies','1');
				ini_set('session.use_only_cookies','1');
			}
		}
	}

	/**
	 * @return boolean whether the session should be automatically started when the session module is initialized, defaults to false.
	 */
	public function getAutoStart()
	{
		return $this->_autoStart;
	}

	/**
	 * @param boolean whether the session should be automatically started when the session module is initialized, defaults to false.
	 * @throws TInvalidOperationException if session is started already
	 */
	public function setAutoStart($value)
	{
		if($this->_initialized)
			throw new TInvalidOperationException('httpsession_autostart_unchangeable');
		else
			$this->_autoStart=TPropertyValue::ensureBoolean($value);
	}

	/**
	 * @return integer the probability (percentage) that the gc (garbage collection) process is started on every session initialization, defaults to 1 meaning 1% chance.
	 */
	public function getGCProbability()
	{
		return TPropertyValue::ensureInteger(ini_get('session.gc_probability'));
	}

	/**
	 * @param integer the probability (percentage) that the gc (garbage collection) process is started on every session initialization.
	 * @throws TInvalidOperationException if session is started already
	 * @throws TInvalidDataValueException if the value is beyond [0,100].
	 */
	public function setGCProbability($value)
	{
		if($this->_started)
			throw new TInvalidOperationException('httpsession_gcprobability_unchangeable');
		else
		{
			$value=TPropertyValue::ensureInteger($value);
			if($value>=0 && $value<=100)
			{
				ini_set('session.gc_probability',$value);
				ini_set('session.gc_divisor','100');
			}
			else
				throw new TInvalidDataValueException('httpsession_gcprobability_invalid',$value);
		}
	}

	/**
	 * @return boolean whether transparent sid support is enabled or not, defaults to false.
	 */
	public function getUseTransparentSessionID()
	{
		return ini_get('session.use_trans_sid')==='1'?true:false;
	}

	/**
	 * @param boolean whether transparent sid support is enabled or not.
	 */
	public function setUseTransparentSessionID($value)
	{
		if($this->_started)
			throw new TInvalidOperationException('httpsession_transid_unchangeable');
		else
			ini_set('session.use_only_cookies',TPropertyValue::ensureBoolean($value)?'1':'0');
	}

	/**
	 * @return integer the number of seconds after which data will be seen as 'garbage' and cleaned up, defaults to 1440 seconds.
	 */
	public function getTimeout()
	{
		return TPropertyValue::ensureInteger(ini_get('session.gc_maxlifetime'));
	}

	/**
	 * @param integer the number of seconds after which data will be seen as 'garbage' and cleaned up
	 * @throws TInvalidOperationException if session is started already
	 */
	public function setTimeout($value)
	{
		if($this->_started)
			throw new TInvalidOperationException('httpsession_maxlifetime_unchangeable');
		else
			ini_set('session.gc_maxlifetime',$value);
	}

	/**
	 * Session open handler.
	 * This method should be overriden if session Storage is set as 'user'.
	 * @param string session save path
	 * @param string session name
	 * @return boolean whether session is opened successfully
	 */
	public function _open($savePath,$sessionName)
	{
		return true;
	}

	/**
	 * Session close handler.
	 * This method should be overriden if session Storage is set as 'user'.
	 * @return boolean whether session is closed successfully
	 */
	public function _close()
	{
		return true;
	}

	/**
	 * Session read handler.
	 * This method should be overriden if session Storage is set as 'user'.
	 * @param string session ID
	 * @return string the session data
	 */
	public function _read($id)
	{
		return '';
	}

	/**
	 * Session write handler.
	 * This method should be overriden if session Storage is set as 'user'.
	 * @param string session ID
	 * @param string session data
	 * @return boolean whether session write is successful
	 */
	public function _write($id,$data)
	{
		return true;
	}

	/**
	 * Session destroy handler.
	 * This method should be overriden if session Storage is set as 'user'.
	 * @param string session ID
	 * @return boolean whether session is destroyed successfully
	 */
	public function _destroy($id)
	{
		return true;
	}

	/**
	 * Session GC (garbage collection) handler.
	 * This method should be overriden if session Storage is set as 'user'.
	 * @param integer the number of seconds after which data will be seen as 'garbage' and cleaned up.
	 * @return boolean whether session is GCed successfully
	 */
	public function _gc($maxLifetime)
	{
		return true;
	}
}

/**
 * THttpSessionCollection class.
 *
 * THttpSessionCollection implements a collection class to store session data items.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Revision: $  $Date: $
 * @package System.Web
 * @since 3.0
 */
class THttpSessionCollection extends TMap
{
	/**
	 * @var boolean whether the initial session data has been loaded into the collection
	 */
	private $_initialized=false;

	/**
	 * Constructor.
	 * Initializes the list with an array or an iterable object.
	 * @param array|Iterator the intial data.
	 */
	public function __construct($data=null)
	{
		parent::__construct($data);
		$this->_initialized=true;
	}

	/**
	 * Adds the item into session.
	 * This method will be invoked whenever an item is added to the collection.
	 */
	protected function addedItem($key,$value)
	{
		if($this->_initialized)
			$_SESSION[$key]=$value;
	}

	/**
	 * Removes the item from session.
	 * This method will be invoked whenever an item is removed from the collection.
	 */
	protected function removedItem($key,$value)
	{
		unset($_SESSION[$key]);
	}
}
?>