-
Notifications
You must be signed in to change notification settings - Fork 89
/
common.inc
4127 lines (3777 loc) · 140 KB
/
common.inc
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
/**
* @file
* Common functions that many Drupal modules will need to reference.
*
* The functions that are critical and need to be available even when serving
* a cached page are instead located in bootstrap.inc.
*/
/**
* Return status for saving which involved creating a new item.
*/
define('SAVED_NEW', 1);
/**
* Return status for saving which involved an update to an existing item.
*/
define('SAVED_UPDATED', 2);
/**
* Return status for saving which deleted an existing item.
*/
define('SAVED_DELETED', 3);
/**
* Create E_DEPRECATED constant for older PHP versions (<5.3).
*/
if (!defined('E_DEPRECATED')) {
define('E_DEPRECATED', 8192);
}
/**
* Error code indicating that the request made by drupal_http_request() exceeded
* the specified timeout.
*/
define('HTTP_REQUEST_TIMEOUT', -1);
/**
* Set content for a specified region.
*
* @param $region
* Page region the content is assigned to.
* @param $data
* Content to be set.
*/
function drupal_set_content($region = NULL, $data = NULL) {
static $content = array();
if (!is_null($region) && !is_null($data)) {
$content[$region][] = $data;
}
return $content;
}
/**
* Get assigned content.
*
* @param $region
* A specified region to fetch content for. If NULL, all regions will be
* returned.
* @param $delimiter
* Content to be inserted between imploded array elements.
*/
function drupal_get_content($region = NULL, $delimiter = ' ') {
$content = drupal_set_content();
if (isset($region)) {
if (isset($content[$region]) && is_array($content[$region])) {
return implode($delimiter, $content[$region]);
}
}
else {
foreach (array_keys($content) as $region) {
if (is_array($content[$region])) {
$content[$region] = implode($delimiter, $content[$region]);
}
}
return $content;
}
}
/**
* Set the breadcrumb trail for the current page.
*
* @param $breadcrumb
* Array of links, starting with "home" and proceeding up to but not including
* the current page.
*/
function drupal_set_breadcrumb($breadcrumb = NULL) {
static $stored_breadcrumb;
if (!is_null($breadcrumb)) {
$stored_breadcrumb = $breadcrumb;
}
return $stored_breadcrumb;
}
/**
* Get the breadcrumb trail for the current page.
*/
function drupal_get_breadcrumb() {
$breadcrumb = drupal_set_breadcrumb();
if (is_null($breadcrumb)) {
$breadcrumb = menu_get_active_breadcrumb();
}
return $breadcrumb;
}
/**
* Add output to the head tag of the HTML page.
*
* This function can be called as long the headers aren't sent.
*/
function drupal_set_html_head($data = NULL) {
static $stored_head = '';
if (!is_null($data)) {
$stored_head .= $data ."\n";
}
return $stored_head;
}
/**
* Retrieve output to be displayed in the head tag of the HTML page.
*/
function drupal_get_html_head() {
$output = "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />\n";
return $output . drupal_set_html_head();
}
/**
* Reset the static variable which holds the aliases mapped for this request.
*/
function drupal_clear_path_cache() {
drupal_lookup_path('wipe');
}
/*
* The function drupal_set_header() has been moved to includes/bootstrap.inc in Pressflow.
*/
/**
* Get the HTTP response headers for the current page.
*
* This function is not called by Pressflow and remains here
* only for Drupal 5/6 API compatibility.
*/
function drupal_get_headers() {
$headers = drupal_set_header();
$header_text = array();
foreach ($headers as $name => $value) {
$header_text[] .= $name . ': ' . $value;
}
return implode("\n", $header_text);
}
/**
* Make any final alterations to the rendered xhtml.
*/
function drupal_final_markup($content) {
// Make sure that the charset is always specified as the first element of the
// head region to prevent encoding-based attacks.
return preg_replace('/<head[^>]*>/i', "\$0\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />", $content, 1);
}
/**
* Add a feed URL for the current page.
*
* @param $url
* A URL for the feed.
* @param $title
* The title of the feed.
*/
function drupal_add_feed($url = NULL, $title = '') {
static $stored_feed_links = array();
if (!is_null($url) && !isset($stored_feed_links[$url])) {
$stored_feed_links[$url] = theme('feed_icon', $url, $title);
drupal_add_link(array('rel' => 'alternate',
'type' => 'application/rss+xml',
'title' => $title,
'href' => $url));
}
return $stored_feed_links;
}
/**
* Get the feed URLs for the current page.
*
* @param $delimiter
* A delimiter to split feeds by.
*/
function drupal_get_feeds($delimiter = "\n") {
$feeds = drupal_add_feed();
return implode($feeds, $delimiter);
}
/**
* @defgroup http_handling HTTP handling
* @{
* Functions to properly handle HTTP responses.
*/
/**
* Parse an array into a valid urlencoded query string.
*
* @param $query
* The array to be processed e.g. $_GET.
* @param $exclude
* The array filled with keys to be excluded. Use parent[child] to exclude
* nested items.
* @param $parent
* Should not be passed, only used in recursive calls.
* @return
* An urlencoded string which can be appended to/as the URL query string.
*/
function drupal_query_string_encode($query, $exclude = array(), $parent = '') {
$params = array();
foreach ($query as $key => $value) {
$key = rawurlencode($key);
if ($parent) {
$key = $parent .'['. $key .']';
}
if (in_array($key, $exclude)) {
continue;
}
if (is_array($value)) {
$params[] = drupal_query_string_encode($value, $exclude, $key);
}
else {
$params[] = $key .'='. rawurlencode($value);
}
}
return implode('&', $params);
}
/**
* Prepare a destination query string for use in combination with drupal_goto().
*
* Used to direct the user back to the referring page after completing a form.
* By default the current URL is returned. If a destination exists in the
* previous request, that destination is returned. As such, a destination can
* persist across multiple pages.
*
* @see drupal_goto()
*/
function drupal_get_destination() {
if (isset($_REQUEST['destination'])) {
return 'destination='. urlencode($_REQUEST['destination']);
}
else {
// Use $_GET here to retrieve the original path in source form.
$path = isset($_GET['q']) ? $_GET['q'] : '';
$query = drupal_query_string_encode($_GET, array('q'));
if ($query != '') {
$path .= '?'. $query;
}
return 'destination='. urlencode($path);
}
}
/**
* Send the user to a different Drupal page.
*
* This issues an on-site HTTP redirect. The function makes sure the redirected
* URL is formatted correctly.
*
* Usually the redirected URL is constructed from this function's input
* parameters. However you may override that behavior by setting a
* destination in either the $_REQUEST-array (i.e. by using
* the query string of an URI) or the $_REQUEST['edit']-array (i.e. by
* using a hidden form field). This is used to direct the user back to
* the proper page after completing a form. For example, after editing
* a post on the 'admin/content/node'-page or after having logged on using the
* 'user login'-block in a sidebar. The function drupal_get_destination()
* can be used to help set the destination URL.
*
* Drupal will ensure that messages set by drupal_set_message() and other
* session data are written to the database before the user is redirected.
*
* This function ends the request; use it rather than a print theme('page')
* statement in your menu callback.
*
* @param $path
* (optional) A Drupal path or a full URL, which will be passed to url() to
* compute the redirect for the URL.
* @param $query
* (optional) A URL-encoded query string to append to the link, or an array of
* query key/value-pairs without any URL-encoding. Passed to url().
* @param $fragment
* (optional) A destination fragment identifier (named anchor).
* @param $http_response_code
* (optional) The HTTP status code to use for the redirection, defaults to 302.
* The valid values for 3xx redirection status codes are defined in
* @link http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.3 RFC 2616 @endlink
* and the
* @link http://tools.ietf.org/html/draft-reschke-http-status-308-07 draft for the new HTTP status codes: @endlink
* - 301: Moved Permanently (the recommended value for most redirects).
* - 302: Found (default in Drupal and PHP, sometimes used for spamming search
* engines).
* - 303: See Other.
* - 304: Not Modified.
* - 305: Use Proxy.
* - 307: Temporary Redirect.
* @see drupal_get_destination()
*/
function drupal_goto($path = '', $query = NULL, $fragment = NULL, $http_response_code = 302) {
$destination = FALSE;
if (isset($_REQUEST['destination'])) {
$destination = $_REQUEST['destination'];
}
else if (isset($_REQUEST['edit']['destination'])) {
$destination = $_REQUEST['edit']['destination'];
}
if ($destination) {
// Do not redirect to an absolute URL originating from user input.
if (!menu_path_is_external($destination)) {
extract(parse_url($destination));
}
}
$options = array('query' => $query, 'fragment' => $fragment, 'absolute' => TRUE);
// In some cases modules call drupal_goto($_GET['q']). We need to ensure that
// such a redirect is not to an external URL.
if ($path === $_GET['q'] && menu_path_is_external($path)) {
// Force url() to generate a non-external URL.
$options['external'] = FALSE;
}
$url = url($path, $options);
// Remove newlines from the URL to avoid header injection attacks.
$url = str_replace(array("\n", "\r"), '', $url);
// Allow modules to react to the end of the page request before redirecting.
// We do not want this while running update.php.
if (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update') {
module_invoke_all('exit', $url);
}
// Even though session_write_close() is registered as a shutdown function,
// we need all session data written to the database before redirecting.
drupal_session_commit();
header('Location: '. $url, TRUE, $http_response_code);
// The "Location" header sends a redirect status code to the HTTP daemon. In
// some cases this can be wrong, so we make sure none of the code below the
// drupal_goto() call gets executed upon redirection.
exit();
}
/**
* Generates a site off-line message.
*/
function drupal_site_offline() {
drupal_maintenance_theme();
drupal_set_header($_SERVER['SERVER_PROTOCOL'] .' 503 Service unavailable');
drupal_set_title(t('Site off-line'));
print theme('maintenance_page', filter_xss_admin(variable_get('site_offline_message',
t('@site is currently under maintenance. We should be back shortly. Thank you for your patience.', array('@site' => variable_get('site_name', 'Pressflow'))))));
}
/**
* Generates a 404 error if the request can not be handled.
*/
function drupal_not_found() {
drupal_set_header($_SERVER['SERVER_PROTOCOL'] .' 404 Not Found');
watchdog('page not found', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
// Keep old path for reference, and to allow forms to redirect to it.
if (!isset($_REQUEST['destination'])) {
// Make sure that the current path is not interpreted as external URL.
if (!menu_path_is_external($_GET['q'])) {
$_REQUEST['destination'] = $_GET['q'];
}
}
$path = drupal_get_normal_path(variable_get('site_404', ''));
if ($path && $path != $_GET['q']) {
// Set the active item in case there are tabs to display, or other
// dependencies on the path.
menu_set_active_item($path);
$return = menu_execute_active_handler($path);
}
if (empty($return) || $return == MENU_NOT_FOUND || $return == MENU_ACCESS_DENIED) {
drupal_set_title(t('Page not found'));
$return = t('The requested page could not be found.');
}
// To conserve CPU and bandwidth, omit the blocks.
print theme('page', $return, FALSE);
}
/**
* Generates a 403 error if the request is not allowed.
*/
function drupal_access_denied() {
drupal_set_header($_SERVER['SERVER_PROTOCOL'] .' 403 Forbidden');
watchdog('access denied', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
// Keep old path for reference, and to allow forms to redirect to it.
if (!isset($_REQUEST['destination'])) {
// Make sure that the current path is not interpreted as external URL.
if (!menu_path_is_external($_GET['q'])) {
$_REQUEST['destination'] = $_GET['q'];
}
}
$path = drupal_get_normal_path(variable_get('site_403', ''));
if ($path && $path != $_GET['q']) {
// Set the active item in case there are tabs to display or other
// dependencies on the path.
menu_set_active_item($path);
$return = menu_execute_active_handler($path);
}
if (empty($return) || $return == MENU_NOT_FOUND || $return == MENU_ACCESS_DENIED) {
drupal_set_title(t('Access denied'));
$return = t('You are not authorized to access this page.');
}
print theme('page', $return);
}
/**
* Perform an HTTP request.
*
* This is a flexible and powerful HTTP client implementation. Correctly handles
* GET, POST, PUT or any other HTTP requests. Handles redirects.
*
* @param $url
* A string containing a fully qualified URI.
* @param $headers
* An array containing an HTTP header => value pair.
* @param $method
* A string defining the HTTP request to use.
* @param $data
* A string containing data to include in the request.
* @param $retry
* An integer representing how many times to retry the request in case of a
* redirect.
* @param $timeout
* A float representing the maximum number of seconds the function call may
* take. The default is 30 seconds. If a timeout occurs, the error code is set
* to the HTTP_REQUEST_TIMEOUT constant.
* @return
* An object containing the HTTP request headers, response code, protocol,
* status message, headers, data and redirect status.
*/
function drupal_http_request($url, $headers = array(), $method = 'GET', $data = NULL, $retry = 3, $timeout = 30.0) {
global $db_prefix;
$result = new stdClass();
// Parse the URL and make sure we can handle the schema.
$uri = parse_url($url);
if ($uri == FALSE) {
$result->error = 'unable to parse URL';
$result->code = -1001;
return $result;
}
if (!isset($uri['scheme'])) {
$result->error = 'missing schema';
$result->code = -1002;
return $result;
}
timer_start(__FUNCTION__);
switch ($uri['scheme']) {
case 'http':
case 'feed':
$port = isset($uri['port']) ? $uri['port'] : 80;
$host = $uri['host'] . ($port != 80 ? ':'. $port : '');
$fp = @fsockopen($uri['host'], $port, $errno, $errstr, $timeout);
break;
case 'https':
// Note: Only works for PHP 4.3 compiled with OpenSSL.
$port = isset($uri['port']) ? $uri['port'] : 443;
$host = $uri['host'] . ($port != 443 ? ':'. $port : '');
$fp = @fsockopen('ssl://'. $uri['host'], $port, $errno, $errstr, $timeout);
break;
default:
$result->error = 'invalid schema '. $uri['scheme'];
$result->code = -1003;
return $result;
}
// Make sure the socket opened properly.
if (!$fp) {
// When a network error occurs, we use a negative number so it does not
// clash with the HTTP status codes.
$result->code = -$errno;
$result->error = trim($errstr);
// Mark that this request failed. This will trigger a check of the web
// server's ability to make outgoing HTTP requests the next time that
// requirements checking is performed.
// @see system_requirements()
variable_set('drupal_http_request_fails', TRUE);
return $result;
}
// Construct the path to act on.
$path = isset($uri['path']) ? $uri['path'] : '/';
if (isset($uri['query'])) {
$path .= '?'. $uri['query'];
}
// Create HTTP request.
$defaults = array(
// RFC 2616: "non-standard ports MUST, default ports MAY be included".
// We don't add the port to prevent from breaking rewrite rules checking the
// host that do not take into account the port number.
'Host' => "Host: $host",
'User-Agent' => 'User-Agent: Drupal (+http://drupal.org/)',
);
// Only add Content-Length if we actually have any content or if it is a POST
// or PUT request. Some non-standard servers get confused by Content-Length in
// at least HEAD/GET requests, and Squid always requires Content-Length in
// POST/PUT requests.
$content_length = strlen($data);
if ($content_length > 0 || $method == 'POST' || $method == 'PUT') {
$defaults['Content-Length'] = 'Content-Length: '. $content_length;
}
// If the server URL has a user then attempt to use basic authentication
if (isset($uri['user'])) {
$defaults['Authorization'] = 'Authorization: Basic '. base64_encode($uri['user'] . (!empty($uri['pass']) ? ":". $uri['pass'] : ''));
}
// If the database prefix is being used by SimpleTest to run the tests in a copied
// database then set the user-agent header to the database prefix so that any
// calls to other Drupal pages will run the SimpleTest prefixed database. The
// user-agent is used to ensure that multiple testing sessions running at the
// same time won't interfere with each other as they would if the database
// prefix were stored statically in a file or database variable.
if (is_string($db_prefix) && preg_match("/^simpletest\d+$/", $db_prefix, $matches)) {
$defaults['User-Agent'] = 'User-Agent: ' . drupal_generate_test_ua($matches[0]);
}
foreach ($headers as $header => $value) {
$defaults[$header] = $header .': '. $value;
}
$request = $method .' '. $path ." HTTP/1.0\r\n";
$request .= implode("\r\n", $defaults);
$request .= "\r\n\r\n";
$request .= $data;
$result->request = $request;
// Calculate how much time is left of the original timeout value.
$time_left = $timeout - timer_read(__FUNCTION__) / 1000;
if ($time_left > 0) {
stream_set_timeout($fp, floor($time_left), floor(1000000 * fmod($time_left, 1)));
fwrite($fp, $request);
}
// Fetch response.
$response = '';
while (!feof($fp)) {
// Calculate how much time is left of the original timeout value.
$time_left = $timeout - timer_read(__FUNCTION__) / 1000;
if ($time_left <= 0) {
$result->code = HTTP_REQUEST_TIMEOUT;
$result->error = 'request timed out';
return $result;
}
stream_set_timeout($fp, floor($time_left), floor(1000000 * fmod($time_left, 1)));
$chunk = fread($fp, 1024);
$response .= $chunk;
}
fclose($fp);
// Parse response headers from the response body.
// Be tolerant of malformed HTTP responses that separate header and body with
// \n\n or \r\r instead of \r\n\r\n. See http://drupal.org/node/183435
list($split, $result->data) = preg_split("/\r\n\r\n|\n\n|\r\r/", $response, 2);
$split = preg_split("/\r\n|\n|\r/", $split);
list($protocol, $code, $status_message) = explode(' ', trim(array_shift($split)), 3);
$result->protocol = $protocol;
$result->status_message = $status_message;
$result->headers = array();
// Parse headers.
while ($line = trim(array_shift($split))) {
list($header, $value) = explode(':', $line, 2);
if (isset($result->headers[$header]) && $header == 'Set-Cookie') {
// RFC 2109: the Set-Cookie response header comprises the token Set-
// Cookie:, followed by a comma-separated list of one or more cookies.
$result->headers[$header] .= ','. trim($value);
}
else {
$result->headers[$header] = trim($value);
}
}
$responses = array(
100 => 'Continue', 101 => 'Switching Protocols',
200 => 'OK', 201 => 'Created', 202 => 'Accepted', 203 => 'Non-Authoritative Information', 204 => 'No Content', 205 => 'Reset Content', 206 => 'Partial Content',
300 => 'Multiple Choices', 301 => 'Moved Permanently', 302 => 'Found', 303 => 'See Other', 304 => 'Not Modified', 305 => 'Use Proxy', 307 => 'Temporary Redirect',
400 => 'Bad Request', 401 => 'Unauthorized', 402 => 'Payment Required', 403 => 'Forbidden', 404 => 'Not Found', 405 => 'Method Not Allowed', 406 => 'Not Acceptable', 407 => 'Proxy Authentication Required', 408 => 'Request Time-out', 409 => 'Conflict', 410 => 'Gone', 411 => 'Length Required', 412 => 'Precondition Failed', 413 => 'Request Entity Too Large', 414 => 'Request-URI Too Large', 415 => 'Unsupported Media Type', 416 => 'Requested range not satisfiable', 417 => 'Expectation Failed',
500 => 'Internal Server Error', 501 => 'Not Implemented', 502 => 'Bad Gateway', 503 => 'Service Unavailable', 504 => 'Gateway Time-out', 505 => 'HTTP Version not supported'
);
// RFC 2616 states that all unknown HTTP codes must be treated the same as the
// base code in their class.
if (!isset($responses[$code])) {
$code = floor($code / 100) * 100;
}
switch ($code) {
case 200: // OK
case 304: // Not modified
break;
case 301: // Moved permanently
case 302: // Moved temporarily
case 307: // Moved temporarily
$location = $result->headers['Location'];
$timeout -= timer_read(__FUNCTION__) / 1000;
if ($timeout <= 0) {
$result->code = HTTP_REQUEST_TIMEOUT;
$result->error = 'request timed out';
}
elseif ($retry) {
$result = drupal_http_request($result->headers['Location'], $headers, $method, $data, --$retry, $timeout);
$result->redirect_code = $result->code;
}
$result->redirect_url = $location;
break;
default:
$result->error = $status_message;
}
$result->code = $code;
return $result;
}
/**
* @} End of "HTTP handling".
*/
/**
* Log errors as defined by administrator.
*
* Error levels:
* - 0 = Log errors to database.
* - 1 = Log errors to database and to screen.
*/
function drupal_error_handler($errno, $message, $filename, $line, $context) {
// If the @ error suppression operator was used, error_reporting will have
// been temporarily set to 0.
if (error_reporting() == 0) {
return;
}
if ($errno & (E_ALL ^ E_DEPRECATED ^ E_NOTICE)) {
$types = array(1 => 'error', 2 => 'warning', 4 => 'parse error', 8 => 'notice', 16 => 'core error', 32 => 'core warning', 64 => 'compile error', 128 => 'compile warning', 256 => 'user error', 512 => 'user warning', 1024 => 'user notice', 2048 => 'strict warning', 4096 => 'recoverable fatal error');
// For database errors, we want the line number/file name of the place that
// the query was originally called, not _db_query().
if (isset($context[DB_ERROR])) {
$backtrace = array_reverse(debug_backtrace());
// List of functions where SQL queries can originate.
$query_functions = array('db_query', 'pager_query', 'db_query_range', 'db_query_temporary', 'update_sql');
// Determine where query function was called, and adjust line/file
// accordingly.
foreach ($backtrace as $index => $function) {
if (in_array($function['function'], $query_functions)) {
$line = $backtrace[$index]['line'];
$filename = $backtrace[$index]['file'];
break;
}
}
}
// Try to use filter_xss(). If it's too early in the bootstrap process for
// filter_xss() to be loaded, use check_plain() instead.
$entry = check_plain($types[$errno]) .': '. (function_exists('filter_xss') ? filter_xss($message) : check_plain($message)) .' in '. check_plain($filename) .' on line '. check_plain($line) .'.';
// Force display of error messages in update.php.
if (variable_get('error_level', 1) == 1 || strstr($_SERVER['SCRIPT_NAME'], 'update.php')) {
drupal_set_message($entry, 'error');
}
watchdog('php', '%message in %file on line %line.', array('%error' => $types[$errno], '%message' => $message, '%file' => $filename, '%line' => $line), WATCHDOG_ERROR);
}
}
function _fix_gpc_magic(&$item) {
if (is_array($item)) {
array_walk($item, '_fix_gpc_magic');
}
else {
$item = stripslashes($item);
}
}
/**
* Helper function to strip slashes from $_FILES skipping over the tmp_name keys
* since PHP generates single backslashes for file paths on Windows systems.
*
* tmp_name does not have backslashes added see
* http://php.net/manual/en/features.file-upload.php#42280
*/
function _fix_gpc_magic_files(&$item, $key) {
if ($key != 'tmp_name') {
if (is_array($item)) {
array_walk($item, '_fix_gpc_magic_files');
}
else {
$item = stripslashes($item);
}
}
}
/**
* Fix double-escaping problems caused by "magic quotes" in some PHP installations.
*/
function fix_gpc_magic() {
static $fixed = FALSE;
if (!$fixed && ini_get('magic_quotes_gpc')) {
array_walk($_GET, '_fix_gpc_magic');
array_walk($_POST, '_fix_gpc_magic');
array_walk($_COOKIE, '_fix_gpc_magic');
array_walk($_REQUEST, '_fix_gpc_magic');
array_walk($_FILES, '_fix_gpc_magic_files');
$fixed = TRUE;
}
}
/**
* Translate strings to the page language or a given language.
*
* Human-readable text that will be displayed somewhere within a page should
* be run through the t() function.
*
* Examples:
* @code
* if (!$info || !$info['extension']) {
* form_set_error('picture_upload', t('The uploaded file was not an image.'));
* }
*
* $form['submit'] = array(
* '#type' => 'submit',
* '#value' => t('Log in'),
* );
* @endcode
*
* Any text within t() can be extracted by translators and changed into
* the equivalent text in their native language.
*
* Special variables called "placeholders" are used to signal dynamic
* information in a string which should not be translated. Placeholders
* can also be used for text that may change from time to time (such as
* link paths) to be changed without requiring updates to translations.
*
* For example:
* @code
* $output = t('There are currently %members and %visitors online.', array(
* '%members' => format_plural($total_users, '1 user', '@count users'),
* '%visitors' => format_plural($guests->count, '1 guest', '@count guests')));
* @endcode
*
* There are three styles of placeholders:
* - !variable, which indicates that the text should be inserted as-is. This is
* useful for inserting variables into things like e-mail.
* @code
* $message[] = t("If you don't want to receive such e-mails, you can change your settings at !url.", array('!url' => url("user/$account->uid", array('absolute' => TRUE))));
* @endcode
*
* - @variable, which indicates that the text should be run through
* check_plain, to escape HTML characters. Use this for any output that's
* displayed within a Drupal page.
* @code
* drupal_set_title($title = t("@name's blog", array('@name' => $account->name)));
* @endcode
*
* - %variable, which indicates that the string should be HTML escaped and
* highlighted with theme_placeholder() which shows up by default as
* <em>emphasized</em>.
* @code
* $message = t('%name-from sent %name-to an e-mail.', array('%name-from' => $user->name, '%name-to' => $account->name));
* @endcode
*
* When using t(), try to put entire sentences and strings in one t() call.
* This makes it easier for translators, as it provides context as to what
* each word refers to. HTML markup within translation strings is allowed, but
* should be avoided if possible. The exception are embedded links; link
* titles add a context for translators, so should be kept in the main string.
*
* Here is an example of incorrect usage of t():
* @code
* $output .= t('<p>Go to the @contact-page.</p>', array('@contact-page' => l(t('contact page'), 'contact')));
* @endcode
*
* Here is an example of t() used correctly:
* @code
* $output .= '<p>'. t('Go to the <a href="@contact-page">contact page</a>.', array('@contact-page' => url('contact'))) .'</p>';
* @endcode
*
* Avoid escaping quotation marks wherever possible.
*
* Incorrect:
* @code
* $output .= t('Don\'t click me.');
* @endcode
*
* Correct:
* @code
* $output .= t("Don't click me.");
* @endcode
*
* Because t() is designed for handling code-based strings, in almost all
* cases, the actual string and not a variable must be passed through t().
*
* Extraction of translations is done based on the strings contained in t()
* calls. If a variable is passed through t(), the content of the variable
* cannot be extracted from the file for translation.
*
* Incorrect:
* @code
* $message = 'An error occurred.';
* drupal_set_message(t($message), 'error');
* $output .= t($message);
* @endcode
*
* Correct:
* @code
* $message = t('An error occurred.');
* drupal_set_message($message, 'error');
* $output .= $message;
* @endcode
*
* The only case in which variables can be passed safely through t() is when
* code-based versions of the same strings will be passed through t() (or
* otherwise extracted) elsewhere.
*
* In some cases, modules may include strings in code that can't use t()
* calls. For example, a module may use an external PHP application that
* produces strings that are loaded into variables in Drupal for output.
* In these cases, module authors may include a dummy file that passes the
* relevant strings through t(). This approach will allow the strings to be
* extracted.
*
* Sample external (non-Drupal) code:
* @code
* class Time {
* public $yesterday = 'Yesterday';
* public $today = 'Today';
* public $tomorrow = 'Tomorrow';
* }
* @endcode
*
* Sample dummy file.
* @code
* // Dummy function included in example.potx.inc.
* function example_potx() {
* $strings = array(
* t('Yesterday'),
* t('Today'),
* t('Tomorrow'),
* );
* // No return value needed, since this is a dummy function.
* }
* @endcode
*
* Having passed strings through t() in a dummy function, it is then
* okay to pass variables through t().
*
* Correct (if a dummy file was used):
* @code
* $time = new Time();
* $output .= t($time->today);
* @endcode
*
* However tempting it is, custom data from user input or other non-code
* sources should not be passed through t(). Doing so leads to the following
* problems and errors:
* - The t() system doesn't support updates to existing strings. When user
* data is updated, the next time it's passed through t() a new record is
* created instead of an update. The database bloats over time and any
* existing translations are orphaned with each update.
* - The t() system assumes any data it receives is in English. User data may
* be in another language, producing translation errors.
* - The "Built-in interface" text group in the locale system is used to
* produce translations for storage in .po files. When non-code strings are
* passed through t(), they are added to this text group, which is rendered
* inaccurate since it is a mix of actual interface strings and various user
* input strings of uncertain origin.
*
* Incorrect:
* @code
* $item = item_load();
* $output .= check_plain(t($item['title']));
* @endcode
*
* Instead, translation of these data can be done through the locale system,
* either directly or through helper functions provided by contributed
* modules.
* @see hook_locale()
*
* During installation, st() is used in place of t(). Code that may be called
* during installation or during normal operation should use the get_t()
* helper function.
* @see st()
* @see get_t()
*
* @param $string
* A string containing the English string to translate.
* @param $args
* An associative array of replacements to make after translation. Incidences
* of any key in this array are replaced with the corresponding value. Based
* on the first character of the key, the value is escaped and/or themed:
* - !variable: inserted as is
* - @variable: escape plain text to HTML (check_plain)
* - %variable: escape text and theme as a placeholder for user-submitted
* content (check_plain + theme_placeholder)
* @param $langcode
* Optional language code to translate to a language other than what is used
* to display the page.
* @return
* The translated string.
*/
function t($string, $args = array(), $langcode = NULL) {
global $language;
static $custom_strings;
$langcode = isset($langcode) ? $langcode : $language->language;
// First, check for an array of customized strings. If present, use the array
// *instead of* database lookups. This is a high performance way to provide a
// handful of string replacements. See settings.php for examples.
// Cache the $custom_strings variable to improve performance.
if (!isset($custom_strings[$langcode])) {
$custom_strings[$langcode] = variable_get('locale_custom_strings_'. $langcode, array());
}
// Custom strings work for English too, even if locale module is disabled.
if (isset($custom_strings[$langcode][$string])) {
$string = $custom_strings[$langcode][$string];
}
// Translate with locale module if enabled.
elseif (function_exists('locale') && $langcode != 'en') {
$string = locale($string, $langcode);
}
if (empty($args)) {
return $string;
}
else {
// Transform arguments before inserting them.
foreach ($args as $key => $value) {
switch ($key[0]) {
case '@':
// Escaped only.
$args[$key] = check_plain($value);
break;
case '%':
default:
// Escaped and placeholder.
$args[$key] = theme('placeholder', $value);
break;
case '!':
// Pass-through.
}
}
return strtr($string, $args);
}
}
/**
* @defgroup validation Input validation
* @{
* Functions to validate user input.
*/
/**
* Verifies the syntax of the given e-mail address.
*
* See @link http://tools.ietf.org/html/rfc5322 RFC 5322 @endlink for details.