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13532 anikendra 1
<?php
2
/**
3
 * HTTP Socket connection class.
4
 *
5
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
6
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
7
 *
8
 * Licensed under The MIT License
9
 * For full copyright and license information, please see the LICENSE.txt
10
 * Redistributions of files must retain the above copyright notice.
11
 *
12
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
13
 * @link          http://cakephp.org CakePHP(tm) Project
14
 * @package       Cake.Network.Http
15
 * @since         CakePHP(tm) v 1.2.0
16
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
17
 */
18
 
19
App::uses('CakeSocket', 'Network');
20
App::uses('Router', 'Routing');
21
App::uses('Hash', 'Utility');
22
 
23
/**
24
 * CakePHP network socket connection class.
25
 *
26
 * Core base class for HTTP network communication. HttpSocket can be used as an
27
 * Object Oriented replacement for cURL in many places.
28
 *
29
 * @package       Cake.Network.Http
30
 */
31
class HttpSocket extends CakeSocket {
32
 
33
/**
34
 * When one activates the $quirksMode by setting it to true, all checks meant to
35
 * enforce RFC 2616 (HTTP/1.1 specs).
36
 * will be disabled and additional measures to deal with non-standard responses will be enabled.
37
 *
38
 * @var boolean
39
 */
40
	public $quirksMode = false;
41
 
42
/**
43
 * Contain information about the last request (read only)
44
 *
45
 * @var array
46
 */
47
	public $request = array(
48
		'method' => 'GET',
49
		'uri' => array(
50
			'scheme' => 'http',
51
			'host' => null,
52
			'port' => 80,
53
			'user' => null,
54
			'pass' => null,
55
			'path' => null,
56
			'query' => null,
57
			'fragment' => null
58
		),
59
		'version' => '1.1',
60
		'body' => '',
61
		'line' => null,
62
		'header' => array(
63
			'Connection' => 'close',
64
			'User-Agent' => 'CakePHP'
65
		),
66
		'raw' => null,
67
		'redirect' => false,
68
		'cookies' => array(),
69
	);
70
 
71
/**
72
 * Contain information about the last response (read only)
73
 *
74
 * @var array
75
 */
76
	public $response = null;
77
 
78
/**
79
 * Response class name
80
 *
81
 * @var string
82
 */
83
	public $responseClass = 'HttpSocketResponse';
84
 
85
/**
86
 * Configuration settings for the HttpSocket and the requests
87
 *
88
 * @var array
89
 */
90
	public $config = array(
91
		'persistent' => false,
92
		'host' => 'localhost',
93
		'protocol' => 'tcp',
94
		'port' => 80,
95
		'timeout' => 30,
96
		'ssl_verify_peer' => true,
97
		'ssl_allow_self_signed' => false,
98
		'ssl_verify_depth' => 5,
99
		'ssl_verify_host' => true,
100
		'request' => array(
101
			'uri' => array(
102
				'scheme' => array('http', 'https'),
103
				'host' => 'localhost',
104
				'port' => array(80, 443)
105
			),
106
			'redirect' => false,
107
			'cookies' => array(),
108
		)
109
	);
110
 
111
/**
112
 * Authentication settings
113
 *
114
 * @var array
115
 */
116
	protected $_auth = array();
117
 
118
/**
119
 * Proxy settings
120
 *
121
 * @var array
122
 */
123
	protected $_proxy = array();
124
 
125
/**
126
 * Resource to receive the content of request
127
 *
128
 * @var mixed
129
 */
130
	protected $_contentResource = null;
131
 
132
/**
133
 * Build an HTTP Socket using the specified configuration.
134
 *
135
 * You can use a URL string to set the URL and use default configurations for
136
 * all other options:
137
 *
138
 * `$http = new HttpSocket('http://cakephp.org/');`
139
 *
140
 * Or use an array to configure multiple options:
141
 *
142
 * {{{
143
 * $http = new HttpSocket(array(
144
 *    'host' => 'cakephp.org',
145
 *    'timeout' => 20
146
 * ));
147
 * }}}
148
 *
149
 * See HttpSocket::$config for options that can be used.
150
 *
151
 * @param string|array $config Configuration information, either a string URL or an array of options.
152
 */
153
	public function __construct($config = array()) {
154
		if (is_string($config)) {
155
			$this->_configUri($config);
156
		} elseif (is_array($config)) {
157
			if (isset($config['request']['uri']) && is_string($config['request']['uri'])) {
158
				$this->_configUri($config['request']['uri']);
159
				unset($config['request']['uri']);
160
			}
161
			$this->config = Hash::merge($this->config, $config);
162
		}
163
		parent::__construct($this->config);
164
	}
165
 
166
/**
167
 * Set authentication settings.
168
 *
169
 * Accepts two forms of parameters. If all you need is a username + password, as with
170
 * Basic authentication you can do the following:
171
 *
172
 * {{{
173
 * $http->configAuth('Basic', 'mark', 'secret');
174
 * }}}
175
 *
176
 * If you are using an authentication strategy that requires more inputs, like Digest authentication
177
 * you can call `configAuth()` with an array of user information.
178
 *
179
 * {{{
180
 * $http->configAuth('Digest', array(
181
 *		'user' => 'mark',
182
 *		'pass' => 'secret',
183
 *		'realm' => 'my-realm',
184
 *		'nonce' => 1235
185
 * ));
186
 * }}}
187
 *
188
 * To remove any set authentication strategy, call `configAuth()` with no parameters:
189
 *
190
 * `$http->configAuth();`
191
 *
192
 * @param string $method Authentication method (ie. Basic, Digest). If empty, disable authentication
193
 * @param string|array $user Username for authentication. Can be an array with settings to authentication class
194
 * @param string $pass Password for authentication
195
 * @return void
196
 */
197
	public function configAuth($method, $user = null, $pass = null) {
198
		if (empty($method)) {
199
			$this->_auth = array();
200
			return;
201
		}
202
		if (is_array($user)) {
203
			$this->_auth = array($method => $user);
204
			return;
205
		}
206
		$this->_auth = array($method => compact('user', 'pass'));
207
	}
208
 
209
/**
210
 * Set proxy settings
211
 *
212
 * @param string|array $host Proxy host. Can be an array with settings to authentication class
213
 * @param integer $port Port. Default 3128.
214
 * @param string $method Proxy method (ie, Basic, Digest). If empty, disable proxy authentication
215
 * @param string $user Username if your proxy need authentication
216
 * @param string $pass Password to proxy authentication
217
 * @return void
218
 */
219
	public function configProxy($host, $port = 3128, $method = null, $user = null, $pass = null) {
220
		if (empty($host)) {
221
			$this->_proxy = array();
222
			return;
223
		}
224
		if (is_array($host)) {
225
			$this->_proxy = $host + array('host' => null);
226
			return;
227
		}
228
		$this->_proxy = compact('host', 'port', 'method', 'user', 'pass');
229
	}
230
 
231
/**
232
 * Set the resource to receive the request content. This resource must support fwrite.
233
 *
234
 * @param resource|boolean $resource Resource or false to disable the resource use
235
 * @return void
236
 * @throws SocketException
237
 */
238
	public function setContentResource($resource) {
239
		if ($resource === false) {
240
			$this->_contentResource = null;
241
			return;
242
		}
243
		if (!is_resource($resource)) {
244
			throw new SocketException(__d('cake_dev', 'Invalid resource.'));
245
		}
246
		$this->_contentResource = $resource;
247
	}
248
 
249
/**
250
 * Issue the specified request. HttpSocket::get() and HttpSocket::post() wrap this
251
 * method and provide a more granular interface.
252
 *
253
 * @param string|array $request Either an URI string, or an array defining host/uri
254
 * @return mixed false on error, HttpSocketResponse on success
255
 * @throws SocketException
256
 */
257
	public function request($request = array()) {
258
		$this->reset(false);
259
 
260
		if (is_string($request)) {
261
			$request = array('uri' => $request);
262
		} elseif (!is_array($request)) {
263
			return false;
264
		}
265
 
266
		if (!isset($request['uri'])) {
267
			$request['uri'] = null;
268
		}
269
		$uri = $this->_parseUri($request['uri']);
270
		if (!isset($uri['host'])) {
271
			$host = $this->config['host'];
272
		}
273
		if (isset($request['host'])) {
274
			$host = $request['host'];
275
			unset($request['host']);
276
		}
277
		$request['uri'] = $this->url($request['uri']);
278
		$request['uri'] = $this->_parseUri($request['uri'], true);
279
		$this->request = Hash::merge($this->request, array_diff_key($this->config['request'], array('cookies' => true)), $request);
280
 
281
		$this->_configUri($this->request['uri']);
282
 
283
		$Host = $this->request['uri']['host'];
284
		if (!empty($this->config['request']['cookies'][$Host])) {
285
			if (!isset($this->request['cookies'])) {
286
				$this->request['cookies'] = array();
287
			}
288
			if (!isset($request['cookies'])) {
289
				$request['cookies'] = array();
290
			}
291
			$this->request['cookies'] = array_merge($this->request['cookies'], $this->config['request']['cookies'][$Host], $request['cookies']);
292
		}
293
 
294
		if (isset($host)) {
295
			$this->config['host'] = $host;
296
		}
297
		$this->_setProxy();
298
		$this->request['proxy'] = $this->_proxy;
299
 
300
		$cookies = null;
301
 
302
		if (is_array($this->request['header'])) {
303
			if (!empty($this->request['cookies'])) {
304
				$cookies = $this->buildCookies($this->request['cookies']);
305
			}
306
			$scheme = '';
307
			$port = 0;
308
			if (isset($this->request['uri']['scheme'])) {
309
				$scheme = $this->request['uri']['scheme'];
310
			}
311
			if (isset($this->request['uri']['port'])) {
312
				$port = $this->request['uri']['port'];
313
			}
314
			if (
315
				($scheme === 'http' && $port != 80) ||
316
				($scheme === 'https' && $port != 443) ||
317
				($port != 80 && $port != 443)
318
			) {
319
				$Host .= ':' . $port;
320
			}
321
			$this->request['header'] = array_merge(compact('Host'), $this->request['header']);
322
		}
323
 
324
		if (isset($this->request['uri']['user'], $this->request['uri']['pass'])) {
325
			$this->configAuth('Basic', $this->request['uri']['user'], $this->request['uri']['pass']);
326
		} elseif (isset($this->request['auth'], $this->request['auth']['method'], $this->request['auth']['user'], $this->request['auth']['pass'])) {
327
			$this->configAuth($this->request['auth']['method'], $this->request['auth']['user'], $this->request['auth']['pass']);
328
		}
329
		$this->_setAuth();
330
		$this->request['auth'] = $this->_auth;
331
 
332
		if (is_array($this->request['body'])) {
333
			$this->request['body'] = http_build_query($this->request['body'], '', '&');
334
		}
335
 
336
		if (!empty($this->request['body']) && !isset($this->request['header']['Content-Type'])) {
337
			$this->request['header']['Content-Type'] = 'application/x-www-form-urlencoded';
338
		}
339
 
340
		if (!empty($this->request['body']) && !isset($this->request['header']['Content-Length'])) {
341
			$this->request['header']['Content-Length'] = strlen($this->request['body']);
342
		}
343
 
344
		$connectionType = null;
345
		if (isset($this->request['header']['Connection'])) {
346
			$connectionType = $this->request['header']['Connection'];
347
		}
348
		$this->request['header'] = $this->_buildHeader($this->request['header']) . $cookies;
349
 
350
		if (empty($this->request['line'])) {
351
			$this->request['line'] = $this->_buildRequestLine($this->request);
352
		}
353
 
354
		if ($this->quirksMode === false && $this->request['line'] === false) {
355
			return false;
356
		}
357
 
358
		$this->_configContext($this->request['uri']['host']);
359
 
360
		$this->request['raw'] = '';
361
		if ($this->request['line'] !== false) {
362
			$this->request['raw'] = $this->request['line'];
363
		}
364
 
365
		if ($this->request['header'] !== false) {
366
			$this->request['raw'] .= $this->request['header'];
367
		}
368
 
369
		$this->request['raw'] .= "\r\n";
370
		$this->request['raw'] .= $this->request['body'];
371
		$this->write($this->request['raw']);
372
 
373
		$response = null;
374
		$inHeader = true;
375
		while ($data = $this->read()) {
376
			if ($this->_contentResource) {
377
				if ($inHeader) {
378
					$response .= $data;
379
					$pos = strpos($response, "\r\n\r\n");
380
					if ($pos !== false) {
381
						$pos += 4;
382
						$data = substr($response, $pos);
383
						fwrite($this->_contentResource, $data);
384
 
385
						$response = substr($response, 0, $pos);
386
						$inHeader = false;
387
					}
388
				} else {
389
					fwrite($this->_contentResource, $data);
390
					fflush($this->_contentResource);
391
				}
392
			} else {
393
				$response .= $data;
394
			}
395
		}
396
 
397
		if ($connectionType === 'close') {
398
			$this->disconnect();
399
		}
400
 
401
		list($plugin, $responseClass) = pluginSplit($this->responseClass, true);
402
		App::uses($responseClass, $plugin . 'Network/Http');
403
		if (!class_exists($responseClass)) {
404
			throw new SocketException(__d('cake_dev', 'Class %s not found.', $this->responseClass));
405
		}
406
		$this->response = new $responseClass($response);
407
 
408
		if (!empty($this->response->cookies)) {
409
			if (!isset($this->config['request']['cookies'][$Host])) {
410
				$this->config['request']['cookies'][$Host] = array();
411
			}
412
			$this->config['request']['cookies'][$Host] = array_merge($this->config['request']['cookies'][$Host], $this->response->cookies);
413
		}
414
 
415
		if ($this->request['redirect'] && $this->response->isRedirect()) {
416
			$request['uri'] = trim(urldecode($this->response->getHeader('Location')), '=');
417
			$request['redirect'] = is_int($this->request['redirect']) ? $this->request['redirect'] - 1 : $this->request['redirect'];
418
			$this->response = $this->request($request);
419
		}
420
 
421
		return $this->response;
422
	}
423
 
424
/**
425
 * Issues a GET request to the specified URI, query, and request.
426
 *
427
 * Using a string uri and an array of query string parameters:
428
 *
429
 * `$response = $http->get('http://google.com/search', array('q' => 'cakephp', 'client' => 'safari'));`
430
 *
431
 * Would do a GET request to `http://google.com/search?q=cakephp&client=safari`
432
 *
433
 * You could express the same thing using a uri array and query string parameters:
434
 *
435
 * {{{
436
 * $response = $http->get(
437
 *     array('host' => 'google.com', 'path' => '/search'),
438
 *     array('q' => 'cakephp', 'client' => 'safari')
439
 * );
440
 * }}}
441
 *
442
 * @param string|array $uri URI to request. Either a string uri, or a uri array, see HttpSocket::_parseUri()
443
 * @param array $query Querystring parameters to append to URI
444
 * @param array $request An indexed array with indexes such as 'method' or uri
445
 * @return mixed Result of request, either false on failure or the response to the request.
446
 */
447
	public function get($uri = null, $query = array(), $request = array()) {
448
		if (!empty($query)) {
449
			$uri = $this->_parseUri($uri, $this->config['request']['uri']);
450
			if (isset($uri['query'])) {
451
				$uri['query'] = array_merge($uri['query'], $query);
452
			} else {
453
				$uri['query'] = $query;
454
			}
455
			$uri = $this->_buildUri($uri);
456
		}
457
 
458
		$request = Hash::merge(array('method' => 'GET', 'uri' => $uri), $request);
459
		return $this->request($request);
460
	}
461
 
462
/**
463
 * Issues a POST request to the specified URI, query, and request.
464
 *
465
 * `post()` can be used to post simple data arrays to a URL:
466
 *
467
 * {{{
468
 * $response = $http->post('http://example.com', array(
469
 *     'username' => 'batman',
470
 *     'password' => 'bruce_w4yne'
471
 * ));
472
 * }}}
473
 *
474
 * @param string|array $uri URI to request. See HttpSocket::_parseUri()
475
 * @param array $data Array of request body data keys and values.
476
 * @param array $request An indexed array with indexes such as 'method' or uri
477
 * @return mixed Result of request, either false on failure or the response to the request.
478
 */
479
	public function post($uri = null, $data = array(), $request = array()) {
480
		$request = Hash::merge(array('method' => 'POST', 'uri' => $uri, 'body' => $data), $request);
481
		return $this->request($request);
482
	}
483
 
484
/**
485
 * Issues a PUT request to the specified URI, query, and request.
486
 *
487
 * @param string|array $uri URI to request, See HttpSocket::_parseUri()
488
 * @param array $data Array of request body data keys and values.
489
 * @param array $request An indexed array with indexes such as 'method' or uri
490
 * @return mixed Result of request
491
 */
492
	public function put($uri = null, $data = array(), $request = array()) {
493
		$request = Hash::merge(array('method' => 'PUT', 'uri' => $uri, 'body' => $data), $request);
494
		return $this->request($request);
495
	}
496
 
497
/**
498
 * Issues a PATCH request to the specified URI, query, and request.
499
 *
500
 * @param string|array $uri URI to request, See HttpSocket::_parseUri()
501
 * @param array $data Array of request body data keys and values.
502
 * @param array $request An indexed array with indexes such as 'method' or uri
503
 * @return mixed Result of request
504
 */
505
	public function patch($uri = null, $data = array(), $request = array()) {
506
		$request = Hash::merge(array('method' => 'PATCH', 'uri' => $uri, 'body' => $data), $request);
507
		return $this->request($request);
508
	}
509
 
510
/**
511
 * Issues a DELETE request to the specified URI, query, and request.
512
 *
513
 * @param string|array $uri URI to request (see {@link _parseUri()})
514
 * @param array $data Array of request body data keys and values.
515
 * @param array $request An indexed array with indexes such as 'method' or uri
516
 * @return mixed Result of request
517
 */
518
	public function delete($uri = null, $data = array(), $request = array()) {
519
		$request = Hash::merge(array('method' => 'DELETE', 'uri' => $uri, 'body' => $data), $request);
520
		return $this->request($request);
521
	}
522
 
523
/**
524
 * Normalizes URLs into a $uriTemplate. If no template is provided
525
 * a default one will be used. Will generate the URL using the
526
 * current config information.
527
 *
528
 * ### Usage:
529
 *
530
 * After configuring part of the request parameters, you can use url() to generate
531
 * URLs.
532
 *
533
 * {{{
534
 * $http = new HttpSocket('http://www.cakephp.org');
535
 * $url = $http->url('/search?q=bar');
536
 * }}}
537
 *
538
 * Would return `http://www.cakephp.org/search?q=bar`
539
 *
540
 * url() can also be used with custom templates:
541
 *
542
 * `$url = $http->url('http://www.cakephp/search?q=socket', '/%path?%query');`
543
 *
544
 * Would return `/search?q=socket`.
545
 *
546
 * @param string|array Either a string or array of URL options to create a URL with.
547
 * @param string $uriTemplate A template string to use for URL formatting.
548
 * @return mixed Either false on failure or a string containing the composed URL.
549
 */
550
	public function url($url = null, $uriTemplate = null) {
551
		if ($url === null) {
552
			$url = '/';
553
		}
554
		if (is_string($url)) {
555
			$scheme = $this->config['request']['uri']['scheme'];
556
			if (is_array($scheme)) {
557
				$scheme = $scheme[0];
558
			}
559
			$port = $this->config['request']['uri']['port'];
560
			if (is_array($port)) {
561
				$port = $port[0];
562
			}
563
			if ($url{0} === '/') {
564
				$url = $this->config['request']['uri']['host'] . ':' . $port . $url;
565
			}
566
			if (!preg_match('/^.+:\/\/|\*|^\//', $url)) {
567
				$url = $scheme . '://' . $url;
568
			}
569
		} elseif (!is_array($url) && !empty($url)) {
570
			return false;
571
		}
572
 
573
		$base = array_merge($this->config['request']['uri'], array('scheme' => array('http', 'https'), 'port' => array(80, 443)));
574
		$url = $this->_parseUri($url, $base);
575
 
576
		if (empty($url)) {
577
			$url = $this->config['request']['uri'];
578
		}
579
 
580
		if (!empty($uriTemplate)) {
581
			return $this->_buildUri($url, $uriTemplate);
582
		}
583
		return $this->_buildUri($url);
584
	}
585
 
586
/**
587
 * Set authentication in request
588
 *
589
 * @return void
590
 * @throws SocketException
591
 */
592
	protected function _setAuth() {
593
		if (empty($this->_auth)) {
594
			return;
595
		}
596
		$method = key($this->_auth);
597
		list($plugin, $authClass) = pluginSplit($method, true);
598
		$authClass = Inflector::camelize($authClass) . 'Authentication';
599
		App::uses($authClass, $plugin . 'Network/Http');
600
 
601
		if (!class_exists($authClass)) {
602
			throw new SocketException(__d('cake_dev', 'Unknown authentication method.'));
603
		}
604
		if (!method_exists($authClass, 'authentication')) {
605
			throw new SocketException(__d('cake_dev', 'The %s does not support authentication.', $authClass));
606
		}
607
		call_user_func_array("$authClass::authentication", array($this, &$this->_auth[$method]));
608
	}
609
 
610
/**
611
 * Set the proxy configuration and authentication
612
 *
613
 * @return void
614
 * @throws SocketException
615
 */
616
	protected function _setProxy() {
617
		if (empty($this->_proxy) || !isset($this->_proxy['host'], $this->_proxy['port'])) {
618
			return;
619
		}
620
		$this->config['host'] = $this->_proxy['host'];
621
		$this->config['port'] = $this->_proxy['port'];
622
 
623
		if (empty($this->_proxy['method']) || !isset($this->_proxy['user'], $this->_proxy['pass'])) {
624
			return;
625
		}
626
		list($plugin, $authClass) = pluginSplit($this->_proxy['method'], true);
627
		$authClass = Inflector::camelize($authClass) . 'Authentication';
628
		App::uses($authClass, $plugin . 'Network/Http');
629
 
630
		if (!class_exists($authClass)) {
631
			throw new SocketException(__d('cake_dev', 'Unknown authentication method for proxy.'));
632
		}
633
		if (!method_exists($authClass, 'proxyAuthentication')) {
634
			throw new SocketException(__d('cake_dev', 'The %s does not support proxy authentication.', $authClass));
635
		}
636
		call_user_func_array("$authClass::proxyAuthentication", array($this, &$this->_proxy));
637
	}
638
 
639
/**
640
 * Parses and sets the specified URI into current request configuration.
641
 *
642
 * @param string|array $uri URI, See HttpSocket::_parseUri()
643
 * @return boolean If uri has merged in config
644
 */
645
	protected function _configUri($uri = null) {
646
		if (empty($uri)) {
647
			return false;
648
		}
649
 
650
		if (is_array($uri)) {
651
			$uri = $this->_parseUri($uri);
652
		} else {
653
			$uri = $this->_parseUri($uri, true);
654
		}
655
 
656
		if (!isset($uri['host'])) {
657
			return false;
658
		}
659
		$config = array(
660
			'request' => array(
661
				'uri' => array_intersect_key($uri, $this->config['request']['uri'])
662
			)
663
		);
664
		$this->config = Hash::merge($this->config, $config);
665
		$this->config = Hash::merge($this->config, array_intersect_key($this->config['request']['uri'], $this->config));
666
		return true;
667
	}
668
 
669
/**
670
 * Configure the socket's context. Adds in configuration
671
 * that can not be declared in the class definition.
672
 *
673
 * @param string $host The host you're connecting to.
674
 * @return void
675
 */
676
	protected function _configContext($host) {
677
		foreach ($this->config as $key => $value) {
678
			if (substr($key, 0, 4) !== 'ssl_') {
679
				continue;
680
			}
681
			$contextKey = substr($key, 4);
682
			if (empty($this->config['context']['ssl'][$contextKey])) {
683
				$this->config['context']['ssl'][$contextKey] = $value;
684
			}
685
			unset($this->config[$key]);
686
		}
687
		if (empty($this->_context['ssl']['cafile'])) {
688
			$this->config['context']['ssl']['cafile'] = CAKE . 'Config' . DS . 'cacert.pem';
689
		}
690
		if (!empty($this->config['context']['ssl']['verify_host'])) {
691
			$this->config['context']['ssl']['CN_match'] = $host;
692
		}
693
		unset($this->config['context']['ssl']['verify_host']);
694
	}
695
 
696
/**
697
 * Takes a $uri array and turns it into a fully qualified URL string
698
 *
699
 * @param string|array $uri Either A $uri array, or a request string. Will use $this->config if left empty.
700
 * @param string $uriTemplate The Uri template/format to use.
701
 * @return mixed A fully qualified URL formatted according to $uriTemplate, or false on failure
702
 */
703
	protected function _buildUri($uri = array(), $uriTemplate = '%scheme://%user:%pass@%host:%port/%path?%query#%fragment') {
704
		if (is_string($uri)) {
705
			$uri = array('host' => $uri);
706
		}
707
		$uri = $this->_parseUri($uri, true);
708
 
709
		if (!is_array($uri) || empty($uri)) {
710
			return false;
711
		}
712
 
713
		$uri['path'] = preg_replace('/^\//', null, $uri['path']);
714
		$uri['query'] = http_build_query($uri['query'], '', '&');
715
		$uri['query'] = rtrim($uri['query'], '=');
716
		$stripIfEmpty = array(
717
			'query' => '?%query',
718
			'fragment' => '#%fragment',
719
			'user' => '%user:%pass@',
720
			'host' => '%host:%port/'
721
		);
722
 
723
		foreach ($stripIfEmpty as $key => $strip) {
724
			if (empty($uri[$key])) {
725
				$uriTemplate = str_replace($strip, null, $uriTemplate);
726
			}
727
		}
728
 
729
		$defaultPorts = array('http' => 80, 'https' => 443);
730
		if (array_key_exists($uri['scheme'], $defaultPorts) && $defaultPorts[$uri['scheme']] == $uri['port']) {
731
			$uriTemplate = str_replace(':%port', null, $uriTemplate);
732
		}
733
		foreach ($uri as $property => $value) {
734
			$uriTemplate = str_replace('%' . $property, $value, $uriTemplate);
735
		}
736
 
737
		if ($uriTemplate === '/*') {
738
			$uriTemplate = '*';
739
		}
740
		return $uriTemplate;
741
	}
742
 
743
/**
744
 * Parses the given URI and breaks it down into pieces as an indexed array with elements
745
 * such as 'scheme', 'port', 'query'.
746
 *
747
 * @param string|array $uri URI to parse
748
 * @param boolean|array $base If true use default URI config, otherwise indexed array to set 'scheme', 'host', 'port', etc.
749
 * @return array Parsed URI
750
 */
751
	protected function _parseUri($uri = null, $base = array()) {
752
		$uriBase = array(
753
			'scheme' => array('http', 'https'),
754
			'host' => null,
755
			'port' => array(80, 443),
756
			'user' => null,
757
			'pass' => null,
758
			'path' => '/',
759
			'query' => null,
760
			'fragment' => null
761
		);
762
 
763
		if (is_string($uri)) {
764
			$uri = parse_url($uri);
765
		}
766
		if (!is_array($uri) || empty($uri)) {
767
			return false;
768
		}
769
		if ($base === true) {
770
			$base = $uriBase;
771
		}
772
 
773
		if (isset($base['port'], $base['scheme']) && is_array($base['port']) && is_array($base['scheme'])) {
774
			if (isset($uri['scheme']) && !isset($uri['port'])) {
775
				$base['port'] = $base['port'][array_search($uri['scheme'], $base['scheme'])];
776
			} elseif (isset($uri['port']) && !isset($uri['scheme'])) {
777
				$base['scheme'] = $base['scheme'][array_search($uri['port'], $base['port'])];
778
			}
779
		}
780
 
781
		if (is_array($base) && !empty($base)) {
782
			$uri = array_merge($base, $uri);
783
		}
784
 
785
		if (isset($uri['scheme']) && is_array($uri['scheme'])) {
786
			$uri['scheme'] = array_shift($uri['scheme']);
787
		}
788
		if (isset($uri['port']) && is_array($uri['port'])) {
789
			$uri['port'] = array_shift($uri['port']);
790
		}
791
 
792
		if (array_key_exists('query', $uri)) {
793
			$uri['query'] = $this->_parseQuery($uri['query']);
794
		}
795
 
796
		if (!array_intersect_key($uriBase, $uri)) {
797
			return false;
798
		}
799
		return $uri;
800
	}
801
 
802
/**
803
 * This function can be thought of as a reverse to PHP5's http_build_query(). It takes a given query string and turns it into an array and
804
 * supports nesting by using the php bracket syntax. So this means you can parse queries like:
805
 *
806
 * - ?key[subKey]=value
807
 * - ?key[]=value1&key[]=value2
808
 *
809
 * A leading '?' mark in $query is optional and does not effect the outcome of this function.
810
 * For the complete capabilities of this implementation take a look at HttpSocketTest::testparseQuery()
811
 *
812
 * @param string|array $query A query string to parse into an array or an array to return directly "as is"
813
 * @return array The $query parsed into a possibly multi-level array. If an empty $query is
814
 *     given, an empty array is returned.
815
 */
816
	protected function _parseQuery($query) {
817
		if (is_array($query)) {
818
			return $query;
819
		}
820
 
821
		$parsedQuery = array();
822
 
823
		if (is_string($query) && !empty($query)) {
824
			$query = preg_replace('/^\?/', '', $query);
825
			$items = explode('&', $query);
826
 
827
			foreach ($items as $item) {
828
				if (strpos($item, '=') !== false) {
829
					list($key, $value) = explode('=', $item, 2);
830
				} else {
831
					$key = $item;
832
					$value = null;
833
				}
834
 
835
				$key = urldecode($key);
836
				$value = urldecode($value);
837
 
838
				if (preg_match_all('/\[([^\[\]]*)\]/iUs', $key, $matches)) {
839
					$subKeys = $matches[1];
840
					$rootKey = substr($key, 0, strpos($key, '['));
841
					if (!empty($rootKey)) {
842
						array_unshift($subKeys, $rootKey);
843
					}
844
					$queryNode =& $parsedQuery;
845
 
846
					foreach ($subKeys as $subKey) {
847
						if (!is_array($queryNode)) {
848
							$queryNode = array();
849
						}
850
 
851
						if ($subKey === '') {
852
							$queryNode[] = array();
853
							end($queryNode);
854
							$subKey = key($queryNode);
855
						}
856
						$queryNode =& $queryNode[$subKey];
857
					}
858
					$queryNode = $value;
859
					continue;
860
				}
861
				if (!isset($parsedQuery[$key])) {
862
					$parsedQuery[$key] = $value;
863
				} else {
864
					$parsedQuery[$key] = (array)$parsedQuery[$key];
865
					$parsedQuery[$key][] = $value;
866
				}
867
			}
868
		}
869
		return $parsedQuery;
870
	}
871
 
872
/**
873
 * Builds a request line according to HTTP/1.1 specs. Activate quirks mode to work outside specs.
874
 *
875
 * @param array $request Needs to contain a 'uri' key. Should also contain a 'method' key, otherwise defaults to GET.
876
 * @param string $versionToken The version token to use, defaults to HTTP/1.1
877
 * @return string Request line
878
 * @throws SocketException
879
 */
880
	protected function _buildRequestLine($request = array(), $versionToken = 'HTTP/1.1') {
881
		$asteriskMethods = array('OPTIONS');
882
 
883
		if (is_string($request)) {
884
			$isValid = preg_match("/(.+) (.+) (.+)\r\n/U", $request, $match);
885
			if (!$this->quirksMode && (!$isValid || ($match[2] === '*' && !in_array($match[3], $asteriskMethods)))) {
886
				throw new SocketException(__d('cake_dev', 'HttpSocket::_buildRequestLine - Passed an invalid request line string. Activate quirks mode to do this.'));
887
			}
888
			return $request;
889
		} elseif (!is_array($request)) {
890
			return false;
891
		} elseif (!array_key_exists('uri', $request)) {
892
			return false;
893
		}
894
 
895
		$request['uri'] = $this->_parseUri($request['uri']);
896
		$request = array_merge(array('method' => 'GET'), $request);
897
		if (!empty($this->_proxy['host'])) {
898
			$request['uri'] = $this->_buildUri($request['uri'], '%scheme://%host:%port/%path?%query');
899
		} else {
900
			$request['uri'] = $this->_buildUri($request['uri'], '/%path?%query');
901
		}
902
 
903
		if (!$this->quirksMode && $request['uri'] === '*' && !in_array($request['method'], $asteriskMethods)) {
904
			throw new SocketException(__d('cake_dev', 'HttpSocket::_buildRequestLine - The "*" asterisk character is only allowed for the following methods: %s. Activate quirks mode to work outside of HTTP/1.1 specs.', implode(',', $asteriskMethods)));
905
		}
906
		return $request['method'] . ' ' . $request['uri'] . ' ' . $versionToken . "\r\n";
907
	}
908
 
909
/**
910
 * Builds the header.
911
 *
912
 * @param array $header Header to build
913
 * @param string $mode
914
 * @return string Header built from array
915
 */
916
	protected function _buildHeader($header, $mode = 'standard') {
917
		if (is_string($header)) {
918
			return $header;
919
		} elseif (!is_array($header)) {
920
			return false;
921
		}
922
 
923
		$fieldsInHeader = array();
924
		foreach ($header as $key => $value) {
925
			$lowKey = strtolower($key);
926
			if (array_key_exists($lowKey, $fieldsInHeader)) {
927
				$header[$fieldsInHeader[$lowKey]] = $value;
928
				unset($header[$key]);
929
			} else {
930
				$fieldsInHeader[$lowKey] = $key;
931
			}
932
		}
933
 
934
		$returnHeader = '';
935
		foreach ($header as $field => $contents) {
936
			if (is_array($contents) && $mode === 'standard') {
937
				$contents = implode(',', $contents);
938
			}
939
			foreach ((array)$contents as $content) {
940
				$contents = preg_replace("/\r\n(?![\t ])/", "\r\n ", $content);
941
				$field = $this->_escapeToken($field);
942
 
943
				$returnHeader .= $field . ': ' . $contents . "\r\n";
944
			}
945
		}
946
		return $returnHeader;
947
	}
948
 
949
/**
950
 * Builds cookie headers for a request.
951
 *
952
 * Cookies can either be in the format returned in responses, or
953
 * a simple key => value pair.
954
 *
955
 * @param array $cookies Array of cookies to send with the request.
956
 * @return string Cookie header string to be sent with the request.
957
 */
958
	public function buildCookies($cookies) {
959
		$header = array();
960
		foreach ($cookies as $name => $cookie) {
961
			if (is_array($cookie)) {
962
				$value = $this->_escapeToken($cookie['value'], array(';'));
963
			} else {
964
				$value = $this->_escapeToken($cookie, array(';'));
965
			}
966
			$header[] = $name . '=' . $value;
967
		}
968
		return $this->_buildHeader(array('Cookie' => implode('; ', $header)), 'pragmatic');
969
	}
970
 
971
/**
972
 * Escapes a given $token according to RFC 2616 (HTTP 1.1 specs)
973
 *
974
 * @param string $token Token to escape
975
 * @param array $chars
976
 * @return string Escaped token
977
 */
978
	protected function _escapeToken($token, $chars = null) {
979
		$regex = '/([' . implode('', $this->_tokenEscapeChars(true, $chars)) . '])/';
980
		$token = preg_replace($regex, '"\\1"', $token);
981
		return $token;
982
	}
983
 
984
/**
985
 * Gets escape chars according to RFC 2616 (HTTP 1.1 specs).
986
 *
987
 * @param boolean $hex true to get them as HEX values, false otherwise
988
 * @param array $chars
989
 * @return array Escape chars
990
 */
991
	protected function _tokenEscapeChars($hex = true, $chars = null) {
992
		if (!empty($chars)) {
993
			$escape = $chars;
994
		} else {
995
			$escape = array('"', "(", ")", "<", ">", "@", ",", ";", ":", "\\", "/", "[", "]", "?", "=", "{", "}", " ");
996
			for ($i = 0; $i <= 31; $i++) {
997
				$escape[] = chr($i);
998
			}
999
			$escape[] = chr(127);
1000
		}
1001
 
1002
		if (!$hex) {
1003
			return $escape;
1004
		}
1005
		foreach ($escape as $key => $char) {
1006
			$escape[$key] = '\\x' . str_pad(dechex(ord($char)), 2, '0', STR_PAD_LEFT);
1007
		}
1008
		return $escape;
1009
	}
1010
 
1011
/**
1012
 * Resets the state of this HttpSocket instance to it's initial state (before Object::__construct got executed) or does
1013
 * the same thing partially for the request and the response property only.
1014
 *
1015
 * @param boolean $full If set to false only HttpSocket::response and HttpSocket::request are reseted
1016
 * @return boolean True on success
1017
 */
1018
	public function reset($full = true) {
1019
		static $initalState = array();
1020
		if (empty($initalState)) {
1021
			$initalState = get_class_vars(__CLASS__);
1022
		}
1023
		if (!$full) {
1024
			$this->request = $initalState['request'];
1025
			$this->response = $initalState['response'];
1026
			return true;
1027
		}
1028
		parent::reset($initalState);
1029
		return true;
1030
	}
1031
 
1032
}