forked from WordPress/wordpress-develop
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathhttp.php
More file actions
2054 lines (1771 loc) · 64.2 KB
/
Copy pathhttp.php
File metadata and controls
2054 lines (1771 loc) · 64.2 KB
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
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<?php
/**
* Simple and uniform HTTP request API.
*
* Will eventually replace and standardize the WordPress HTTP requests made.
*
* @link http://trac.wordpress.org/ticket/4779 HTTP API Proposal
*
* @package WordPress
* @subpackage HTTP
* @since 2.7.0
* @author Jacob Santos <[email protected]>
*/
/**
* WordPress HTTP Class for managing HTTP Transports and making HTTP requests.
*
* This class is called for the functionality of making HTTP requests and should replace Snoopy
* functionality, eventually. There is no available functionality to add HTTP transport
* implementations, since most of the HTTP transports are added and available for use.
*
* The exception is that cURL is not available as a transport and lacking an implementation. It will
* be added later and should be a patch on the WordPress Trac.
*
* There are no properties, because none are needed and for performance reasons. Some of the
* functions are static and while they do have some overhead over functions in PHP4, the purpose is
* maintainability. When PHP5 is finally the requirement, it will be easy to add the static keyword
* to the code. It is not as easy to convert a function to a method after enough code uses the old
* way.
*
* Debugging includes several actions, which pass different variables for debugging the HTTP API.
*
* <strong>http_transport_get_debug</strong> - gives working, nonblocking, and blocking transports.
*
* <strong>http_transport_post_debug</strong> - gives working, nonblocking, and blocking transports.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7.0
*/
class WP_Http {
/**
* PHP4 style Constructor - Calls PHP5 Style Constructor
*
* @since 2.7.0
* @return WP_Http
*/
function WP_Http() {
$this->__construct();
}
/**
* PHP5 style Constructor - Setup available transport if not available.
*
* PHP4 does not have the 'self' keyword and since WordPress supports PHP4,
* the class needs to be used for the static call.
*
* The transport are setup to save time. This should only be called once, so
* the overhead should be fine.
*
* @since 2.7.0
* @return WP_Http
*/
function __construct() {
WP_Http::_getTransport();
WP_Http::_postTransport();
}
/**
* Tests the WordPress HTTP objects for an object to use and returns it.
*
* Tests all of the objects and returns the object that passes. Also caches
* that object to be used later.
*
* The order for the GET/HEAD requests are Streams, HTTP Extension, Fopen,
* and finally Fsockopen. fsockopen() is used last, because it has the most
* overhead in its implementation. There isn't any real way around it, since
* redirects have to be supported, much the same way the other transports
* also handle redirects.
*
* There are currently issues with "localhost" not resolving correctly with
* DNS. This may cause an error "failed to open stream: A connection attempt
* failed because the connected party did not properly respond after a
* period of time, or established connection failed because connected host
* has failed to respond."
*
* @since 2.7.0
* @access private
*
* @param array $args Request args, default us an empty array
* @return object|null Null if no transports are available, HTTP transport object.
*/
function &_getTransport( $args = array() ) {
static $working_transport, $blocking_transport, $nonblocking_transport;
if ( is_null($working_transport) ) {
if ( true === WP_Http_ExtHttp::test($args) ) {
$working_transport['exthttp'] = new WP_Http_ExtHttp();
$blocking_transport[] = &$working_transport['exthttp'];
} else if ( true === WP_Http_Curl::test($args) ) {
$working_transport['curl'] = new WP_Http_Curl();
$blocking_transport[] = &$working_transport['curl'];
} else if ( true === WP_Http_Streams::test($args) ) {
$working_transport['streams'] = new WP_Http_Streams();
$blocking_transport[] = &$working_transport['streams'];
} else if ( true === WP_Http_Fopen::test($args) ) {
$working_transport['fopen'] = new WP_Http_Fopen();
$blocking_transport[] = &$working_transport['fopen'];
} else if ( true === WP_Http_Fsockopen::test($args) ) {
$working_transport['fsockopen'] = new WP_Http_Fsockopen();
$blocking_transport[] = &$working_transport['fsockopen'];
}
foreach ( array('curl', 'streams', 'fopen', 'fsockopen', 'exthttp') as $transport ) {
if ( isset($working_transport[$transport]) )
$nonblocking_transport[] = &$working_transport[$transport];
}
}
if ( has_filter('http_transport_get_debug') )
do_action('http_transport_get_debug', $working_transport, $blocking_transport, $nonblocking_transport);
if ( isset($args['blocking']) && !$args['blocking'] )
return $nonblocking_transport;
else
return $blocking_transport;
}
/**
* Tests the WordPress HTTP objects for an object to use and returns it.
*
* Tests all of the objects and returns the object that passes. Also caches
* that object to be used later. This is for posting content to a URL and
* is used when there is a body. The plain Fopen Transport can not be used
* to send content, but the streams transport can. This is a limitation that
* is addressed here, by just not including that transport.
*
* @since 2.7.0
* @access private
*
* @param array $args Request args, default us an empty array
* @return object|null Null if no transports are available, HTTP transport object.
*/
function &_postTransport( $args = array() ) {
static $working_transport, $blocking_transport, $nonblocking_transport;
if ( is_null($working_transport) ) {
if ( true === WP_Http_ExtHttp::test($args) ) {
$working_transport['exthttp'] = new WP_Http_ExtHttp();
$blocking_transport[] = &$working_transport['exthttp'];
} else if ( true === WP_Http_Curl::test($args) ) {
$working_transport['curl'] = new WP_Http_Curl();
$blocking_transport[] = &$working_transport['curl'];
} else if ( true === WP_Http_Streams::test($args) ) {
$working_transport['streams'] = new WP_Http_Streams();
$blocking_transport[] = &$working_transport['streams'];
} else if ( true === WP_Http_Fsockopen::test($args) ) {
$working_transport['fsockopen'] = new WP_Http_Fsockopen();
$blocking_transport[] = &$working_transport['fsockopen'];
}
foreach ( array('curl', 'streams', 'fsockopen', 'exthttp') as $transport ) {
if ( isset($working_transport[$transport]) )
$nonblocking_transport[] = &$working_transport[$transport];
}
}
if ( has_filter('http_transport_post_debug') )
do_action('http_transport_post_debug', $working_transport, $blocking_transport, $nonblocking_transport);
if ( isset($args['blocking']) && !$args['blocking'] )
return $nonblocking_transport;
else
return $blocking_transport;
}
/**
* Send a HTTP request to a URI.
*
* The body and headers are part of the arguments. The 'body' argument is for the body and will
* accept either a string or an array. The 'headers' argument should be an array, but a string
* is acceptable. If the 'body' argument is an array, then it will automatically be escaped
* using http_build_query().
*
* The only URI that are supported in the HTTP Transport implementation are the HTTP and HTTPS
* protocols. HTTP and HTTPS are assumed so the server might not know how to handle the send
* headers. Other protocols are unsupported and most likely will fail.
*
* The defaults are 'method', 'timeout', 'redirection', 'httpversion', 'blocking' and
* 'user-agent'.
*
* Accepted 'method' values are 'GET', 'POST', and 'HEAD', some transports technically allow
* others, but should not be assumed. The 'timeout' is used to sent how long the connection
* should stay open before failing when no response. 'redirection' is used to track how many
* redirects were taken and used to sent the amount for other transports, but not all transports
* accept setting that value.
*
* The 'httpversion' option is used to sent the HTTP version and accepted values are '1.0', and
* '1.1' and should be a string. Version 1.1 is not supported, because of chunk response. The
* 'user-agent' option is the user-agent and is used to replace the default user-agent, which is
* 'WordPress/WP_Version', where WP_Version is the value from $wp_version.
*
* 'blocking' is the default, which is used to tell the transport, whether it should halt PHP
* while it performs the request or continue regardless. Actually, that isn't entirely correct.
* Blocking mode really just means whether the fread should just pull what it can whenever it
* gets bytes or if it should wait until it has enough in the buffer to read or finishes reading
* the entire content. It doesn't actually always mean that PHP will continue going after making
* the request.
*
* @access public
* @since 2.7.0
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @return array containing 'headers', 'body', 'response', 'cookies'
*/
function request( $url, $args = array() ) {
global $wp_version;
$defaults = array(
'method' => 'GET',
'timeout' => apply_filters( 'http_request_timeout', 5),
'redirection' => apply_filters( 'http_request_redirection_count', 5),
'httpversion' => apply_filters( 'http_request_version', '1.0'),
'user-agent' => apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ) ),
'blocking' => true,
'headers' => array(),
'cookies' => array(),
'body' => null,
'compress' => false,
'decompress' => true,
'sslverify' => true
);
$r = wp_parse_args( $args, $defaults );
$r = apply_filters( 'http_request_args', $r, $url );
$arrURL = parse_url($url);
if ( $this->block_request( $url ) )
return new WP_Error('http_request_failed', __('User has blocked requests through HTTP.'));
// Determine if this is a https call and pass that on to the transport functions
// so that we can blacklist the transports that do not support ssl verification
$r['ssl'] = $arrURL['scheme'] == 'https' || $arrURL['scheme'] == 'ssl';
// Determine if this request is to OUR install of WordPress
$homeURL = parse_url(get_bloginfo('url'));
$r['local'] = $homeURL['host'] == $arrURL['host'] || 'localhost' == $arrURL['host'];
unset($homeURL);
if ( is_null( $r['headers'] ) )
$r['headers'] = array();
if ( ! is_array($r['headers']) ) {
$processedHeaders = WP_Http::processHeaders($r['headers']);
$r['headers'] = $processedHeaders['headers'];
}
if ( isset($r['headers']['User-Agent']) ) {
$r['user-agent'] = $r['headers']['User-Agent'];
unset($r['headers']['User-Agent']);
}
if ( isset($r['headers']['user-agent']) ) {
$r['user-agent'] = $r['headers']['user-agent'];
unset($r['headers']['user-agent']);
}
// Construct Cookie: header if any cookies are set
WP_Http::buildCookieHeader( $r );
if ( WP_Http_Encoding::is_available() )
$r['headers']['Accept-Encoding'] = WP_Http_Encoding::accept_encoding();
if ( is_null($r['body']) ) {
// Some servers fail when sending content without the content-length
// header being set.
$r['headers']['Content-Length'] = 0;
$transports = WP_Http::_getTransport($r);
} else {
if ( is_array( $r['body'] ) || is_object( $r['body'] ) ) {
if ( ! version_compare(phpversion(), '5.1.2', '>=') )
$r['body'] = _http_build_query($r['body'], null, '&');
else
$r['body'] = http_build_query($r['body'], null, '&');
$r['headers']['Content-Type'] = 'application/x-www-form-urlencoded; charset=' . get_option('blog_charset');
$r['headers']['Content-Length'] = strlen($r['body']);
}
if ( ! isset( $r['headers']['Content-Length'] ) && ! isset( $r['headers']['content-length'] ) )
$r['headers']['Content-Length'] = strlen($r['body']);
$transports = WP_Http::_postTransport($r);
}
if ( has_action('http_api_debug') )
do_action('http_api_debug', $transports, 'transports_list');
$response = array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
foreach ( (array) $transports as $transport ) {
$response = $transport->request($url, $r);
if ( has_action('http_api_debug') )
do_action( 'http_api_debug', $response, 'response', get_class($transport) );
if ( ! is_wp_error($response) )
return $response;
}
return $response;
}
/**
* Uses the POST HTTP method.
*
* Used for sending data that is expected to be in the body.
*
* @access public
* @since 2.7.0
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @return boolean
*/
function post($url, $args = array()) {
$defaults = array('method' => 'POST');
$r = wp_parse_args( $args, $defaults );
return $this->request($url, $r);
}
/**
* Uses the GET HTTP method.
*
* Used for sending data that is expected to be in the body.
*
* @access public
* @since 2.7.0
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @return boolean
*/
function get($url, $args = array()) {
$defaults = array('method' => 'GET');
$r = wp_parse_args( $args, $defaults );
return $this->request($url, $r);
}
/**
* Uses the HEAD HTTP method.
*
* Used for sending data that is expected to be in the body.
*
* @access public
* @since 2.7.0
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @return boolean
*/
function head($url, $args = array()) {
$defaults = array('method' => 'HEAD');
$r = wp_parse_args( $args, $defaults );
return $this->request($url, $r);
}
/**
* Parses the responses and splits the parts into headers and body.
*
* @access public
* @static
* @since 2.7.0
*
* @param string $strResponse The full response string
* @return array Array with 'headers' and 'body' keys.
*/
function processResponse($strResponse) {
list($theHeaders, $theBody) = explode("\r\n\r\n", $strResponse, 2);
return array('headers' => $theHeaders, 'body' => $theBody);
}
/**
* Transform header string into an array.
*
* If an array is given then it is assumed to be raw header data with numeric keys with the
* headers as the values. No headers must be passed that were already processed.
*
* @access public
* @static
* @since 2.7.0
*
* @param string|array $headers
* @return array Processed string headers. If duplicate headers are encountered,
* Then a numbered array is returned as the value of that header-key.
*/
function processHeaders($headers) {
// split headers, one per array element
if ( is_string($headers) ) {
// tolerate line terminator: CRLF = LF (RFC 2616 19.3)
$headers = str_replace("\r\n", "\n", $headers);
// unfold folded header fields. LWS = [CRLF] 1*( SP | HT ) <US-ASCII SP, space (32)>, <US-ASCII HT, horizontal-tab (9)> (RFC 2616 2.2)
$headers = preg_replace('/\n[ \t]/', ' ', $headers);
// create the headers array
$headers = explode("\n", $headers);
}
$response = array('code' => 0, 'message' => '');
$cookies = array();
$newheaders = array();
foreach ( $headers as $tempheader ) {
if ( empty($tempheader) )
continue;
if ( false === strpos($tempheader, ':') ) {
list( , $iResponseCode, $strResponseMsg) = explode(' ', $tempheader, 3);
$response['code'] = $iResponseCode;
$response['message'] = $strResponseMsg;
continue;
}
list($key, $value) = explode(':', $tempheader, 2);
if ( !empty( $value ) ) {
$key = strtolower( $key );
if ( isset( $newheaders[$key] ) ) {
$newheaders[$key] = array( $newheaders[$key], trim( $value ) );
} else {
$newheaders[$key] = trim( $value );
}
if ( 'set-cookie' == strtolower( $key ) )
$cookies[] = new WP_Http_Cookie( $value );
}
}
return array('response' => $response, 'headers' => $newheaders, 'cookies' => $cookies);
}
/**
* Takes the arguments for a ::request() and checks for the cookie array.
*
* If it's found, then it's assumed to contain WP_Http_Cookie objects, which are each parsed
* into strings and added to the Cookie: header (within the arguments array). Edits the array by
* reference.
*
* @access public
* @version 2.8.0
* @static
*
* @param array $r Full array of args passed into ::request()
*/
function buildCookieHeader( &$r ) {
if ( ! empty($r['cookies']) ) {
$cookies_header = '';
foreach ( (array) $r['cookies'] as $cookie ) {
$cookies_header .= $cookie->getHeaderValue() . '; ';
}
$cookies_header = substr( $cookies_header, 0, -2 );
$r['headers']['cookie'] = $cookies_header;
}
}
/**
* Decodes chunk transfer-encoding, based off the HTTP 1.1 specification.
*
* Based off the HTTP http_encoding_dechunk function. Does not support UTF-8. Does not support
* returning footer headers. Shouldn't be too difficult to support it though.
*
* @todo Add support for footer chunked headers.
* @access public
* @since 2.7.0
* @static
*
* @param string $body Body content
* @return string Chunked decoded body on success or raw body on failure.
*/
function chunkTransferDecode($body) {
$body = str_replace(array("\r\n", "\r"), "\n", $body);
// The body is not chunked encoding or is malformed.
if ( ! preg_match( '/^[0-9a-f]+(\s|\n)+/mi', trim($body) ) )
return $body;
$parsedBody = '';
//$parsedHeaders = array(); Unsupported
while ( true ) {
$hasChunk = (bool) preg_match( '/^([0-9a-f]+)(\s|\n)+/mi', $body, $match );
if ( $hasChunk ) {
if ( empty( $match[1] ) )
return $body;
$length = hexdec( $match[1] );
$chunkLength = strlen( $match[0] );
$strBody = substr($body, $chunkLength, $length);
$parsedBody .= $strBody;
$body = ltrim(str_replace(array($match[0], $strBody), '', $body), "\n");
if ( "0" == trim($body) )
return $parsedBody; // Ignore footer headers.
} else {
return $body;
}
}
}
/**
* Block requests through the proxy.
*
* Those who are behind a proxy and want to prevent access to certain hosts may do so. This will
* prevent plugins from working and core functionality, if you don't include api.wordpress.org.
*
* You block external URL requests by defining WP_HTTP_BLOCK_EXTERNAL in your wp-config.php file
* and this will only allow localhost and your blog to make requests. The constant
* WP_ACCESSIBLE_HOSTS will allow additional hosts to go through for requests. The format of the
* WP_ACCESSIBLE_HOSTS constant is a comma separated list of hostnames to allow.
*
* @since 2.8.0
* @link http://core.trac.wordpress.org/ticket/8927 Allow preventing external requests.
*
* @param string $uri URI of url.
* @return bool True to block, false to allow.
*/
function block_request($uri) {
// We don't need to block requests, because nothing is blocked.
if ( ! defined('WP_HTTP_BLOCK_EXTERNAL') || ( defined('WP_HTTP_BLOCK_EXTERNAL') && WP_HTTP_BLOCK_EXTERNAL == false ) )
return false;
// parse_url() only handles http, https type URLs, and will emit E_WARNING on failure.
// This will be displayed on blogs, which is not reasonable.
$check = @parse_url($uri);
/* Malformed URL, can not process, but this could mean ssl, so let through anyway.
*
* This isn't very security sound. There are instances where a hacker might attempt
* to bypass the proxy and this check. However, the reason for this behavior is that
* WordPress does not do any checking currently for non-proxy requests, so it is keeps with
* the default unsecure nature of the HTTP request.
*/
if ( $check === false )
return false;
$home = parse_url( get_option('siteurl') );
// Don't block requests back to ourselves by default
if ( $check['host'] == 'localhost' || $check['host'] == $home['host'] )
return apply_filters('block_local_requests', false);
if ( !defined('WP_ACCESSIBLE_HOSTS') )
return true;
static $accessible_hosts;
if ( null == $accessible_hosts )
$accessible_hosts = preg_split('|,\s*|', WP_ACCESSIBLE_HOSTS);
return !in_array( $check['host'], $accessible_hosts ); //Inverse logic, If its in the array, then we can't access it.
}
}
/**
* HTTP request method uses fsockopen function to retrieve the url.
*
* This would be the preferred method, but the fsockopen implementation has the most overhead of all
* the HTTP transport implementations.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7.0
*/
class WP_Http_Fsockopen {
/**
* Send a HTTP request to a URI using fsockopen().
*
* Does not support non-blocking mode.
*
* @see WP_Http::request For default options descriptions.
*
* @since 2.7
* @access public
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @return array 'headers', 'body', 'cookies' and 'response' keys.
*/
function request($url, $args = array()) {
$defaults = array(
'method' => 'GET', 'timeout' => 5,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true,
'headers' => array(), 'body' => null, 'cookies' => array()
);
$r = wp_parse_args( $args, $defaults );
if ( isset($r['headers']['User-Agent']) ) {
$r['user-agent'] = $r['headers']['User-Agent'];
unset($r['headers']['User-Agent']);
} else if( isset($r['headers']['user-agent']) ) {
$r['user-agent'] = $r['headers']['user-agent'];
unset($r['headers']['user-agent']);
}
// Construct Cookie: header if any cookies are set
WP_Http::buildCookieHeader( $r );
$iError = null; // Store error number
$strError = null; // Store error string
$arrURL = parse_url($url);
$fsockopen_host = $arrURL['host'];
$secure_transport = false;
if ( ! isset( $arrURL['port'] ) ) {
if ( ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' ) && extension_loaded('openssl') ) {
$fsockopen_host = "ssl://$fsockopen_host";
$arrURL['port'] = 443;
$secure_transport = true;
} else {
$arrURL['port'] = 80;
}
}
// There are issues with the HTTPS and SSL protocols that cause errors that can be safely
// ignored and should be ignored.
if ( true === $secure_transport )
$error_reporting = error_reporting(0);
$startDelay = time();
$proxy = new WP_HTTP_Proxy();
if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) ) {
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
$handle = @fsockopen( $proxy->host(), $proxy->port(), $iError, $strError, $r['timeout'] );
else
$handle = @fsockopen( $fsockopen_host, $arrURL['port'], $iError, $strError, $r['timeout'] );
} else {
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
$handle = fsockopen( $proxy->host(), $proxy->port(), $iError, $strError, $r['timeout'] );
else
$handle = fsockopen( $fsockopen_host, $arrURL['port'], $iError, $strError, $r['timeout'] );
}
$endDelay = time();
// If the delay is greater than the timeout then fsockopen should't be used, because it will
// cause a long delay.
$elapseDelay = ($endDelay-$startDelay) > $r['timeout'];
if ( true === $elapseDelay )
add_option( 'disable_fsockopen', $endDelay, null, true );
if ( false === $handle )
return new WP_Error('http_request_failed', $iError . ': ' . $strError);
stream_set_timeout($handle, $r['timeout'] );
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) //Some proxies require full URL in this field.
$requestPath = $url;
else
$requestPath = $arrURL['path'] . ( isset($arrURL['query']) ? '?' . $arrURL['query'] : '' );
if ( empty($requestPath) )
$requestPath .= '/';
$strHeaders = strtoupper($r['method']) . ' ' . $requestPath . ' HTTP/' . $r['httpversion'] . "\r\n";
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
$strHeaders .= 'Host: ' . $arrURL['host'] . ':' . $arrURL['port'] . "\r\n";
else
$strHeaders .= 'Host: ' . $arrURL['host'] . "\r\n";
if ( isset($r['user-agent']) )
$strHeaders .= 'User-agent: ' . $r['user-agent'] . "\r\n";
if ( is_array($r['headers']) ) {
foreach ( (array) $r['headers'] as $header => $headerValue )
$strHeaders .= $header . ': ' . $headerValue . "\r\n";
} else {
$strHeaders .= $r['headers'];
}
if ( $proxy->use_authentication() )
$strHeaders .= $proxy->authentication_header() . "\r\n";
$strHeaders .= "\r\n";
if ( ! is_null($r['body']) )
$strHeaders .= $r['body'];
fwrite($handle, $strHeaders);
if ( ! $r['blocking'] ) {
fclose($handle);
return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
}
$strResponse = '';
while ( ! feof($handle) )
$strResponse .= fread($handle, 4096);
fclose($handle);
if ( true === $secure_transport )
error_reporting($error_reporting);
$process = WP_Http::processResponse($strResponse);
$arrHeaders = WP_Http::processHeaders($process['headers']);
// Is the response code within the 400 range?
if ( (int) $arrHeaders['response']['code'] >= 400 && (int) $arrHeaders['response']['code'] < 500 )
return new WP_Error('http_request_failed', $arrHeaders['response']['code'] . ': ' . $arrHeaders['response']['message']);
// If location is found, then assume redirect and redirect to location.
if ( isset($arrHeaders['headers']['location']) ) {
if ( $r['redirection']-- > 0 ) {
return $this->request($arrHeaders['headers']['location'], $r);
} else {
return new WP_Error('http_request_failed', __('Too many redirects.'));
}
}
// If the body was chunk encoded, then decode it.
if ( ! empty( $process['body'] ) && isset( $arrHeaders['headers']['transfer-encoding'] ) && 'chunked' == $arrHeaders['headers']['transfer-encoding'] )
$process['body'] = WP_Http::chunkTransferDecode($process['body']);
if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($arrHeaders['headers']) )
$process['body'] = WP_Http_Encoding::decompress( $process['body'] );
return array('headers' => $arrHeaders['headers'], 'body' => $process['body'], 'response' => $arrHeaders['response'], 'cookies' => $arrHeaders['cookies']);
}
/**
* Whether this class can be used for retrieving an URL.
*
* @since 2.7.0
* @static
* @return boolean False means this class can not be used, true means it can.
*/
function test( $args = array() ) {
if ( false !== ($option = get_option( 'disable_fsockopen' )) && time()-$option < 43200 ) // 12 hours
return false;
$is_ssl = isset($args['ssl']) && $args['ssl'];
if ( ! $is_ssl && function_exists( 'fsockopen' ) )
$use = true;
elseif ( $is_ssl && extension_loaded('openssl') && function_exists( 'fsockopen' ) )
$use = true;
else
$use = false;
return apply_filters('use_fsockopen_transport', $use, $args);
}
}
/**
* HTTP request method uses fopen function to retrieve the url.
*
* Requires PHP version greater than 4.3.0 for stream support. Does not allow for $context support,
* but should still be okay, to write the headers, before getting the response. Also requires that
* 'allow_url_fopen' to be enabled.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7.0
*/
class WP_Http_Fopen {
/**
* Send a HTTP request to a URI using fopen().
*
* This transport does not support sending of headers and body, therefore should not be used in
* the instances, where there is a body and headers.
*
* Notes: Does not support non-blocking mode. Ignores 'redirection' option.
*
* @see WP_Http::retrieve For default options descriptions.
*
* @access public
* @since 2.7.0
*
* @param string $url URI resource.
* @param str|array $args Optional. Override the defaults.
* @return array 'headers', 'body', 'cookies' and 'response' keys.
*/
function request($url, $args = array()) {
$defaults = array(
'method' => 'GET', 'timeout' => 5,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true,
'headers' => array(), 'body' => null, 'cookies' => array()
);
$r = wp_parse_args( $args, $defaults );
$arrURL = parse_url($url);
if ( false === $arrURL )
return new WP_Error('http_request_failed', sprintf(__('Malformed URL: %s'), $url));
if ( 'http' != $arrURL['scheme'] && 'https' != $arrURL['scheme'] )
$url = str_replace($arrURL['scheme'], 'http', $url);
if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) )
$handle = @fopen($url, 'r');
else
$handle = fopen($url, 'r');
if (! $handle)
return new WP_Error('http_request_failed', sprintf(__('Could not open handle for fopen() to %s'), $url));
stream_set_timeout($handle, $r['timeout'] );
if ( ! $r['blocking'] ) {
fclose($handle);
return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
}
$strResponse = '';
while ( ! feof($handle) )
$strResponse .= fread($handle, 4096);
if ( function_exists('stream_get_meta_data') ) {
$meta = stream_get_meta_data($handle);
$theHeaders = $meta['wrapper_data'];
if ( isset( $meta['wrapper_data']['headers'] ) )
$theHeaders = $meta['wrapper_data']['headers'];
} else {
//$http_response_header is a PHP reserved variable which is set in the current-scope when using the HTTP Wrapper
//see http://php.oregonstate.edu/manual/en/reserved.variables.httpresponseheader.php
$theHeaders = $http_response_header;
}
fclose($handle);
$processedHeaders = WP_Http::processHeaders($theHeaders);
if ( ! empty( $strResponse ) && isset( $processedHeaders['headers']['transfer-encoding'] ) && 'chunked' == $processedHeaders['headers']['transfer-encoding'] )
$strResponse = WP_Http::chunkTransferDecode($strResponse);
if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($processedHeaders['headers']) )
$strResponse = WP_Http_Encoding::decompress( $strResponse );
return array('headers' => $processedHeaders['headers'], 'body' => $strResponse, 'response' => $processedHeaders['response'], 'cookies' => $processedHeaders['cookies']);
}
/**
* Whether this class can be used for retrieving an URL.
*
* @since 2.7.0
* @static
* @return boolean False means this class can not be used, true means it can.
*/
function test($args = array()) {
if ( ! function_exists('fopen') || (function_exists('ini_get') && true != ini_get('allow_url_fopen')) )
return false;
$use = true;
//PHP does not verify SSL certs, We can only make a request via this transports if SSL Verification is turned off.
$is_ssl = isset($args['ssl']) && $args['ssl'];
if ( $is_ssl ) {
$is_local = isset($args['local']) && $args['local'];
$ssl_verify = isset($args['sslverify']) && $args['sslverify'];
if ( $is_local && true != apply_filters('https_local_ssl_verify', true) )
$use = true;
elseif ( !$is_local && true != apply_filters('https_ssl_verify', true) )
$use = true;
elseif ( !$ssl_verify )
$use = true;
else
$use = false;
}
return apply_filters('use_fopen_transport', $use, $args);
}
}
/**
* HTTP request method uses Streams to retrieve the url.
*
* Requires PHP 5.0+ and uses fopen with stream context. Requires that 'allow_url_fopen' PHP setting
* to be enabled.
*
* Second preferred method for getting the URL, for PHP 5.
*
* @package WordPress
* @subpackage HTTP
* @since 2.7.0
*/
class WP_Http_Streams {
/**
* Send a HTTP request to a URI using streams with fopen().
*
* @access public
* @since 2.7.0
*
* @param string $url
* @param str|array $args Optional. Override the defaults.
* @return array 'headers', 'body', 'cookies' and 'response' keys.
*/
function request($url, $args = array()) {
$defaults = array(
'method' => 'GET', 'timeout' => 5,
'redirection' => 5, 'httpversion' => '1.0',
'blocking' => true,
'headers' => array(), 'body' => null, 'cookies' => array()
);
$r = wp_parse_args( $args, $defaults );
if ( isset($r['headers']['User-Agent']) ) {
$r['user-agent'] = $r['headers']['User-Agent'];
unset($r['headers']['User-Agent']);
} else if( isset($r['headers']['user-agent']) ) {
$r['user-agent'] = $r['headers']['user-agent'];
unset($r['headers']['user-agent']);
}
// Construct Cookie: header if any cookies are set
WP_Http::buildCookieHeader( $r );
$arrURL = parse_url($url);
if ( false === $arrURL )
return new WP_Error('http_request_failed', sprintf(__('Malformed URL: %s'), $url));
if ( 'http' != $arrURL['scheme'] && 'https' != $arrURL['scheme'] )
$url = preg_replace('|^' . preg_quote($arrURL['scheme'], '|') . '|', 'http', $url);
// Convert Header array to string.
$strHeaders = '';
if ( is_array( $r['headers'] ) )
foreach ( $r['headers'] as $name => $value )
$strHeaders .= "{$name}: $value\r\n";
else if ( is_string( $r['headers'] ) )
$strHeaders = $r['headers'];
$is_local = isset($args['local']) && $args['local'];
$ssl_verify = isset($args['sslverify']) && $args['sslverify'];
if ( $is_local )
$ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify);
elseif ( ! $is_local )
$ssl_verify = apply_filters('https_ssl_verify', $ssl_verify);
$arrContext = array('http' =>
array(
'method' => strtoupper($r['method']),
'user_agent' => $r['user-agent'],
'max_redirects' => $r['redirection'],
'protocol_version' => (float) $r['httpversion'],
'header' => $strHeaders,
'timeout' => $r['timeout'],
'ssl' => array(
'verify_peer' => $ssl_verify,
'verify_host' => $ssl_verify
)
)
);
$proxy = new WP_HTTP_Proxy();
if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) {
$arrContext['http']['proxy'] = 'tcp://' . $proxy->host() . ':' . $proxy->port();
$arrContext['http']['request_fulluri'] = true;
// We only support Basic authentication so this will only work if that is what your proxy supports.
if ( $proxy->use_authentication() )
$arrContext['http']['header'] .= $proxy->authentication_header() . "\r\n";
}
if ( ! is_null($r['body']) && ! empty($r['body'] ) )
$arrContext['http']['content'] = $r['body'];
$context = stream_context_create($arrContext);
if ( ! defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) )
$handle = @fopen($url, 'r', false, $context);
else
$handle = fopen($url, 'r', false, $context);
if ( ! $handle)
return new WP_Error('http_request_failed', sprintf(__('Could not open handle for fopen() to %s'), $url));
// WordPress supports PHP 4.3, which has this function. Removed sanity checking for
// performance reasons.
stream_set_timeout($handle, $r['timeout'] );
if ( ! $r['blocking'] ) {
stream_set_blocking($handle, 0);
fclose($handle);
return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
}
$strResponse = stream_get_contents($handle);
$meta = stream_get_meta_data($handle);