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root / drupal7 / includes / xmlrpc.inc @ 2196f227

1
<?php
2

    
3
/**
4
 * @file
5
 * Drupal XML-RPC library.
6
 *
7
 * Based on the IXR - The Incutio XML-RPC Library - (c) Incutio Ltd 2002-2005
8
 * Version 1.7 (beta) - Simon Willison, 23rd May 2005
9
 * Site:   http://scripts.incutio.com/xmlrpc/
10
 * Manual: http://scripts.incutio.com/xmlrpc/manual.php
11
 * This version is made available under the GNU GPL License
12
 */
13

    
14
/**
15
 * Turns a data structure into objects with 'data' and 'type' attributes.
16
 *
17
 * @param $data
18
 *   The data structure.
19
 * @param $type
20
 *   Optional type to assign to $data.
21
 *
22
 * @return object
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 *   An XML-RPC data object containing the input $data.
24
 */
25
function xmlrpc_value($data, $type = FALSE) {
26
  $xmlrpc_value = new stdClass();
27
  $xmlrpc_value->data = $data;
28
  if (!$type) {
29
    $type = xmlrpc_value_calculate_type($xmlrpc_value);
30
  }
31
  $xmlrpc_value->type = $type;
32
  if ($type == 'struct') {
33
    // Turn all the values in the array into new xmlrpc_values
34
    foreach ($xmlrpc_value->data as $key => $value) {
35
      $xmlrpc_value->data[$key] = xmlrpc_value($value);
36
    }
37
  }
38
  if ($type == 'array') {
39
    for ($i = 0, $j = count($xmlrpc_value->data); $i < $j; $i++) {
40
      $xmlrpc_value->data[$i] = xmlrpc_value($xmlrpc_value->data[$i]);
41
    }
42
  }
43
  return $xmlrpc_value;
44
}
45

    
46
/**
47
 * Maps a PHP type to an XML-RPC type.
48
 *
49
 * @param $xmlrpc_value
50
 *   Variable whose type should be mapped.
51
 *
52
 * @return string
53
 *   The corresponding XML-RPC type.
54
 *
55
 * @see http://www.xmlrpc.com/spec#scalars
56
 */
57
function xmlrpc_value_calculate_type($xmlrpc_value) {
58
  // http://www.php.net/gettype: Never use gettype() to test for a certain type
59
  // [...] Instead, use the is_* functions.
60
  if (is_bool($xmlrpc_value->data)) {
61
    return 'boolean';
62
  }
63
  if (is_double($xmlrpc_value->data)) {
64
    return 'double';
65
  }
66
  if (is_int($xmlrpc_value->data)) {
67
    return 'int';
68
  }
69
  if (is_array($xmlrpc_value->data)) {
70
    // empty or integer-indexed arrays are 'array', string-indexed arrays 'struct'
71
    return empty($xmlrpc_value->data) || range(0, count($xmlrpc_value->data) - 1) === array_keys($xmlrpc_value->data) ? 'array' : 'struct';
72
  }
73
  if (is_object($xmlrpc_value->data)) {
74
    if (isset($xmlrpc_value->data->is_date)) {
75
      return 'date';
76
    }
77
    if (isset($xmlrpc_value->data->is_base64)) {
78
      return 'base64';
79
    }
80
    $xmlrpc_value->data = get_object_vars($xmlrpc_value->data);
81
    return 'struct';
82
  }
83
  // default
84
  return 'string';
85
}
86

    
87
/**
88
 * Generates XML representing the given value.
89
 *
90
 * @param $xmlrpc_value
91
 *   A value to be represented in XML.
92
 *
93
 * @return
94
 *   XML representation of $xmlrpc_value.
95
 */
96
function xmlrpc_value_get_xml($xmlrpc_value) {
97
  switch ($xmlrpc_value->type) {
98
    case 'boolean':
99
      return '<boolean>' . (($xmlrpc_value->data) ? '1' : '0') . '</boolean>';
100

    
101
    case 'int':
102
      return '<int>' . $xmlrpc_value->data . '</int>';
103

    
104
    case 'double':
105
      return '<double>' . $xmlrpc_value->data . '</double>';
106

    
107
    case 'string':
108
      // Note: we don't escape apostrophes because of the many blogging clients
109
      // that don't support numerical entities (and XML in general) properly.
110
      return '<string>' . htmlspecialchars($xmlrpc_value->data) . '</string>';
111

    
112
    case 'array':
113
      $return = '<array><data>' . "\n";
114
      foreach ($xmlrpc_value->data as $item) {
115
        $return .= '  <value>' . xmlrpc_value_get_xml($item) . "</value>\n";
116
      }
117
      $return .= '</data></array>';
118
      return $return;
119

    
120
    case 'struct':
121
      $return = '<struct>' . "\n";
122
      foreach ($xmlrpc_value->data as $name => $value) {
123
        $return .= "  <member><name>" . check_plain($name) . "</name><value>";
124
        $return .= xmlrpc_value_get_xml($value) . "</value></member>\n";
125
      }
126
      $return .= '</struct>';
127
      return $return;
128

    
129
    case 'date':
130
      return xmlrpc_date_get_xml($xmlrpc_value->data);
131

    
132
    case 'base64':
133
      return xmlrpc_base64_get_xml($xmlrpc_value->data);
134
  }
135
  return FALSE;
136
}
137

    
138
/**
139
 * Constructs an object representing an XML-RPC message.
140
 *
141
 * @param $message
142
 *   A string containing an XML message.
143
 *
144
 * @return object
145
 *   An XML-RPC object containing the message.
146
 *
147
 * @see http://www.xmlrpc.com/spec
148
 */
149
function xmlrpc_message($message) {
150
  $xmlrpc_message = new stdClass();
151
  // The stack used to keep track of the current array/struct
152
  $xmlrpc_message->array_structs = array();
153
  // The stack used to keep track of if things are structs or array
154
  $xmlrpc_message->array_structs_types = array();
155
  // A stack as well
156
  $xmlrpc_message->current_struct_name = array();
157
  $xmlrpc_message->message = $message;
158
  return $xmlrpc_message;
159
}
160

    
161
/**
162
 * Parses an XML-RPC message.
163
 *
164
 * If parsing fails, the faultCode and faultString will be added to the message
165
 * object.
166
 *
167
 * @param $xmlrpc_message
168
 *   An object generated by xmlrpc_message().
169
 *
170
 * @return
171
 *   TRUE if parsing succeeded; FALSE otherwise.
172
 */
173
function xmlrpc_message_parse($xmlrpc_message) {
174
  $xmlrpc_message->_parser = xml_parser_create();
175
  // Set XML parser to take the case of tags into account.
176
  xml_parser_set_option($xmlrpc_message->_parser, XML_OPTION_CASE_FOLDING, FALSE);
177
  // Set XML parser callback functions
178
  xml_set_element_handler($xmlrpc_message->_parser, 'xmlrpc_message_tag_open', 'xmlrpc_message_tag_close');
179
  xml_set_character_data_handler($xmlrpc_message->_parser, 'xmlrpc_message_cdata');
180
  xmlrpc_message_set($xmlrpc_message);
181

    
182
  // Strip XML declaration.
183
  $header = preg_replace('/<\?xml.*?\?'.'>/s', '', substr($xmlrpc_message->message, 0, 100), 1);
184
  $xml = trim(substr_replace($xmlrpc_message->message, $header, 0, 100));
185
  if ($xml == '') {
186
    return FALSE;
187
  }
188
  // Strip DTD.
189
  $header = preg_replace('/^<!DOCTYPE[^>]*+>/i', '', substr($xml, 0, 200), 1);
190
  $xml = trim(substr_replace($xml, $header, 0, 200));
191
  if ($xml == '') {
192
    return FALSE;
193
  }
194
  // Confirm the XML now starts with a valid root tag. A root tag can end in [> \t\r\n]
195
  $root_tag = substr($xml, 0, strcspn(substr($xml, 0, 20), "> \t\r\n"));
196
  // Reject a second DTD.
197
  if (strtoupper($root_tag) == '<!DOCTYPE') {
198
    return FALSE;
199
  }
200
  if (!in_array($root_tag, array('<methodCall', '<methodResponse', '<fault'))) {
201
    return FALSE;
202
  }
203
  // Skip parsing if there is an unreasonably large number of tags.
204
  try {
205
    $dom = new DOMDocument();
206
    @$dom->loadXML($xml);
207
    if ($dom->getElementsByTagName('*')->length > variable_get('xmlrpc_message_maximum_tag_count', 30000)) {
208
      return FALSE;
209
    }
210
  }
211
  catch (Exception $e) {
212
    return FALSE;
213
  }
214

    
215
  if (!xml_parse($xmlrpc_message->_parser, $xml)) {
216
    return FALSE;
217
  }
218
  xml_parser_free($xmlrpc_message->_parser);
219

    
220
  // Grab the error messages, if any.
221
  $xmlrpc_message = xmlrpc_message_get();
222
  if (!isset($xmlrpc_message->messagetype)) {
223
    return FALSE;
224
  }
225
  elseif ($xmlrpc_message->messagetype == 'fault') {
226
    $xmlrpc_message->fault_code = $xmlrpc_message->params[0]['faultCode'];
227
    $xmlrpc_message->fault_string = $xmlrpc_message->params[0]['faultString'];
228
  }
229
  return TRUE;
230
}
231

    
232
/**
233
 * Stores a copy of the most recent XML-RPC message object temporarily.
234
 *
235
 * @param $value
236
 *   An XML-RPC message to store, or NULL to keep the last message.
237
 *
238
 * @return object
239
 *   The most recently stored message.
240
 *
241
 * @see xmlrpc_message_get()
242
 */
243
function xmlrpc_message_set($value = NULL) {
244
  static $xmlrpc_message;
245
  if ($value) {
246
    $xmlrpc_message = $value;
247
  }
248
  return $xmlrpc_message;
249
}
250

    
251
/**
252
 * Returns the most recently stored XML-RPC message object.
253
 *
254
 * @return object
255
 *   The most recently stored message.
256
 *
257
 * @see xmlrpc_message_set()
258
 */
259
function xmlrpc_message_get() {
260
  return xmlrpc_message_set();
261
}
262

    
263
/**
264
 * Handles opening tags for XML parsing in xmlrpc_message_parse().
265
 */
266
function xmlrpc_message_tag_open($parser, $tag, $attr) {
267
  $xmlrpc_message = xmlrpc_message_get();
268
  $xmlrpc_message->current_tag_contents = '';
269
  $xmlrpc_message->last_open = $tag;
270
  switch ($tag) {
271
    case 'methodCall':
272
    case 'methodResponse':
273
    case 'fault':
274
      $xmlrpc_message->messagetype = $tag;
275
      break;
276

    
277
    // Deal with stacks of arrays and structs
278
    case 'data':
279
      $xmlrpc_message->array_structs_types[] = 'array';
280
      $xmlrpc_message->array_structs[] = array();
281
      break;
282

    
283
    case 'struct':
284
      $xmlrpc_message->array_structs_types[] = 'struct';
285
      $xmlrpc_message->array_structs[] = array();
286
      break;
287
  }
288
  xmlrpc_message_set($xmlrpc_message);
289
}
290

    
291
/**
292
 * Handles character data for XML parsing in xmlrpc_message_parse().
293
 */
294
function xmlrpc_message_cdata($parser, $cdata) {
295
  $xmlrpc_message = xmlrpc_message_get();
296
  $xmlrpc_message->current_tag_contents .= $cdata;
297
  xmlrpc_message_set($xmlrpc_message);
298
}
299

    
300
/**
301
 * Handles closing tags for XML parsing in xmlrpc_message_parse().
302
 */
303
function xmlrpc_message_tag_close($parser, $tag) {
304
  $xmlrpc_message = xmlrpc_message_get();
305
  $value_flag = FALSE;
306
  switch ($tag) {
307
    case 'int':
308
    case 'i4':
309
      $value = (int)trim($xmlrpc_message->current_tag_contents);
310
      $value_flag = TRUE;
311
      break;
312

    
313
    case 'double':
314
      $value = (double)trim($xmlrpc_message->current_tag_contents);
315
      $value_flag = TRUE;
316
      break;
317

    
318
    case 'string':
319
      $value = $xmlrpc_message->current_tag_contents;
320
      $value_flag = TRUE;
321
      break;
322

    
323
    case 'dateTime.iso8601':
324
      $value = xmlrpc_date(trim($xmlrpc_message->current_tag_contents));
325
      // $value = $iso->getTimestamp();
326
      $value_flag = TRUE;
327
      break;
328

    
329
    case 'value':
330
      // If no type is indicated, the type is string
331
      // We take special care for empty values
332
      if (trim($xmlrpc_message->current_tag_contents) != '' || (isset($xmlrpc_message->last_open) && ($xmlrpc_message->last_open == 'value'))) {
333
        $value = (string) $xmlrpc_message->current_tag_contents;
334
        $value_flag = TRUE;
335
      }
336
      unset($xmlrpc_message->last_open);
337
      break;
338

    
339
    case 'boolean':
340
      $value = (boolean)trim($xmlrpc_message->current_tag_contents);
341
      $value_flag = TRUE;
342
      break;
343

    
344
    case 'base64':
345
      $value = base64_decode(trim($xmlrpc_message->current_tag_contents));
346
      $value_flag = TRUE;
347
      break;
348

    
349
    // Deal with stacks of arrays and structs
350
    case 'data':
351
    case 'struct':
352
      $value = array_pop($xmlrpc_message->array_structs);
353
      array_pop($xmlrpc_message->array_structs_types);
354
      $value_flag = TRUE;
355
      break;
356

    
357
    case 'member':
358
      array_pop($xmlrpc_message->current_struct_name);
359
      break;
360

    
361
    case 'name':
362
      $xmlrpc_message->current_struct_name[] = trim($xmlrpc_message->current_tag_contents);
363
      break;
364

    
365
    case 'methodName':
366
      $xmlrpc_message->methodname = trim($xmlrpc_message->current_tag_contents);
367
      break;
368
  }
369
  if ($value_flag) {
370
    if (count($xmlrpc_message->array_structs) > 0) {
371
      // Add value to struct or array
372
      if ($xmlrpc_message->array_structs_types[count($xmlrpc_message->array_structs_types) - 1] == 'struct') {
373
        // Add to struct
374
        $xmlrpc_message->array_structs[count($xmlrpc_message->array_structs) - 1][$xmlrpc_message->current_struct_name[count($xmlrpc_message->current_struct_name) - 1]] = $value;
375
      }
376
      else {
377
        // Add to array
378
        $xmlrpc_message->array_structs[count($xmlrpc_message->array_structs) - 1][] = $value;
379
      }
380
    }
381
    else {
382
      // Just add as a parameter
383
      $xmlrpc_message->params[] = $value;
384
    }
385
  }
386
  if (!in_array($tag, array("data", "struct", "member"))) {
387
    $xmlrpc_message->current_tag_contents = '';
388
  }
389
  xmlrpc_message_set($xmlrpc_message);
390
}
391

    
392
/**
393
 * Constructs an object representing an XML-RPC request.
394
 *
395
 * @param $method
396
 *   The name of the method to be called.
397
 * @param $args
398
 *   An array of parameters to send with the method.
399
 *
400
 * @return object
401
 *   An XML-RPC object representing the request.
402
 */
403
function xmlrpc_request($method, $args) {
404
  $xmlrpc_request = new stdClass();
405
  $xmlrpc_request->method = $method;
406
  $xmlrpc_request->args = $args;
407
  $xmlrpc_request->xml = <<<EOD
408
<?xml version="1.0"?>
409
<methodCall>
410
<methodName>{$xmlrpc_request->method}</methodName>
411
<params>
412

    
413
EOD;
414
  foreach ($xmlrpc_request->args as $arg) {
415
    $xmlrpc_request->xml .= '<param><value>';
416
    $v = xmlrpc_value($arg);
417
    $xmlrpc_request->xml .= xmlrpc_value_get_xml($v);
418
    $xmlrpc_request->xml .= "</value></param>\n";
419
  }
420
  $xmlrpc_request->xml .= '</params></methodCall>';
421
  return $xmlrpc_request;
422
}
423

    
424
/**
425
 * Generates, temporarily saves, and returns an XML-RPC error object.
426
 *
427
 * @param $code
428
 *   The error code.
429
 * @param $message
430
 *   The error message.
431
 * @param $reset
432
 *   TRUE to empty the temporary error storage. Ignored if $code is supplied.
433
 *
434
 * @return object
435
 *   An XML-RPC error object representing $code and $message, or the most
436
 *   recently stored error object if omitted.
437
 */
438
function xmlrpc_error($code = NULL, $message = NULL, $reset = FALSE) {
439
  static $xmlrpc_error;
440
  if (isset($code)) {
441
    $xmlrpc_error = new stdClass();
442
    $xmlrpc_error->is_error = TRUE;
443
    $xmlrpc_error->code = $code;
444
    $xmlrpc_error->message = $message;
445
  }
446
  elseif ($reset) {
447
    $xmlrpc_error = NULL;
448
  }
449
  return $xmlrpc_error;
450
}
451

    
452
/**
453
 * Converts an XML-RPC error object into XML.
454
 *
455
 * @param $xmlrpc_error
456
 *   The XML-RPC error object.
457
 *
458
 * @return string
459
 *   An XML representation of the error as an XML methodResponse.
460
 */
461
function xmlrpc_error_get_xml($xmlrpc_error) {
462
  return <<<EOD
463
<methodResponse>
464
  <fault>
465
  <value>
466
    <struct>
467
    <member>
468
      <name>faultCode</name>
469
      <value><int>{$xmlrpc_error->code}</int></value>
470
    </member>
471
    <member>
472
      <name>faultString</name>
473
      <value><string>{$xmlrpc_error->message}</string></value>
474
    </member>
475
    </struct>
476
  </value>
477
  </fault>
478
</methodResponse>
479

    
480
EOD;
481
}
482

    
483
/**
484
 * Converts a PHP or ISO date/time to an XML-RPC object.
485
 *
486
 * @param $time
487
 *   A PHP timestamp or an ISO date-time string.
488
 *
489
 * @return object
490
 *   An XML-RPC time/date object.
491
 */
492
function xmlrpc_date($time) {
493
  $xmlrpc_date = new stdClass();
494
  $xmlrpc_date->is_date = TRUE;
495
  // $time can be a PHP timestamp or an ISO one
496
  if (is_numeric($time)) {
497
    $xmlrpc_date->year = gmdate('Y', $time);
498
    $xmlrpc_date->month = gmdate('m', $time);
499
    $xmlrpc_date->day = gmdate('d', $time);
500
    $xmlrpc_date->hour = gmdate('H', $time);
501
    $xmlrpc_date->minute = gmdate('i', $time);
502
    $xmlrpc_date->second = gmdate('s', $time);
503
    $xmlrpc_date->iso8601 = gmdate('Ymd\TH:i:s', $time);
504
  }
505
  else {
506
    $xmlrpc_date->iso8601 = $time;
507
    $time = str_replace(array('-', ':'), '', $time);
508
    $xmlrpc_date->year = substr($time, 0, 4);
509
    $xmlrpc_date->month = substr($time, 4, 2);
510
    $xmlrpc_date->day = substr($time, 6, 2);
511
    $xmlrpc_date->hour = substr($time, 9, 2);
512
    $xmlrpc_date->minute = substr($time, 11, 2);
513
    $xmlrpc_date->second = substr($time, 13, 2);
514
  }
515
  return $xmlrpc_date;
516
}
517

    
518
/**
519
 * Converts an XML-RPC date-time object into XML.
520
 *
521
 * @param $xmlrpc_date
522
 *   The XML-RPC date-time object.
523
 *
524
 * @return string
525
 *   An XML representation of the date/time as XML.
526
 */
527
function xmlrpc_date_get_xml($xmlrpc_date) {
528
  return '<dateTime.iso8601>' . $xmlrpc_date->year . $xmlrpc_date->month . $xmlrpc_date->day . 'T' . $xmlrpc_date->hour . ':' . $xmlrpc_date->minute . ':' . $xmlrpc_date->second . '</dateTime.iso8601>';
529
}
530

    
531
/**
532
 * Returns an XML-RPC base 64 object.
533
 *
534
 * @param $data
535
 *   Base 64 data to store in returned object.
536
 *
537
 * @return object
538
 *   An XML-RPC base 64 object.
539
 */
540
function xmlrpc_base64($data) {
541
  $xmlrpc_base64 = new stdClass();
542
  $xmlrpc_base64->is_base64 = TRUE;
543
  $xmlrpc_base64->data = $data;
544
  return $xmlrpc_base64;
545
}
546

    
547
/**
548
 * Converts an XML-RPC base 64 object into XML.
549
 *
550
 * @param $xmlrpc_base64
551
 *   The XML-RPC base 64 object.
552
 *
553
 * @return string
554
 *   An XML representation of the base 64 data as XML.
555
 */
556
function xmlrpc_base64_get_xml($xmlrpc_base64) {
557
  return '<base64>' . base64_encode($xmlrpc_base64->data) . '</base64>';
558
}
559

    
560
/**
561
 * Performs one or more XML-RPC requests.
562
 *
563
 * @param $url
564
 *   An absolute URL of the XML-RPC endpoint, e.g.,
565
 *   http://example.com/xmlrpc.php
566
 * @param $args
567
 *   An associative array whose keys are the methods to call and whose values
568
 *   are the arguments to pass to the respective method. If multiple methods
569
 *   are specified, a system.multicall is performed.
570
 * @param $options
571
 *   (optional) An array of options to pass along to drupal_http_request().
572
 *
573
 * @return
574
 *   A single response (single request) or an array of responses (multicall
575
 *   request). Each response is the return value of the method, just as if it
576
 *   has been a local function call, on success, or FALSE on failure. If FALSE
577
 *   is returned, see xmlrpc_errno() and xmlrpc_error_msg() to get more
578
 *   information.
579
 */
580
function _xmlrpc($url, $args, $options = array()) {
581
  xmlrpc_clear_error();
582
  if (count($args) > 1) {
583
    $multicall_args = array();
584
    foreach ($args as $method => $call) {
585
      $multicall_args[] = array('methodName' => $method, 'params' => $call);
586
    }
587
    $method = 'system.multicall';
588
    $args = array($multicall_args);
589
  }
590
  else {
591
    $method = key($args);
592
    $args = $args[$method];
593
  }
594
  $xmlrpc_request = xmlrpc_request($method, $args);
595
  // Required options which will replace any that are passed in.
596
  $options['method'] = 'POST';
597
  $options['headers']['Content-Type'] = 'text/xml';
598
  $options['data'] = $xmlrpc_request->xml;
599
  $result = drupal_http_request($url, $options);
600
  if ($result->code != 200) {
601
    xmlrpc_error($result->code, $result->error);
602
    return FALSE;
603
  }
604
  $message = xmlrpc_message($result->data);
605
  // Now parse what we've got back
606
  if (!xmlrpc_message_parse($message)) {
607
    // XML error
608
    xmlrpc_error(-32700, t('Parse error. Not well formed'));
609
    return FALSE;
610
  }
611
  // Is the message a fault?
612
  if ($message->messagetype == 'fault') {
613
    xmlrpc_error($message->fault_code, $message->fault_string);
614
    return FALSE;
615
  }
616
  // We now know that the message is well-formed and a non-fault result.
617
  if ($method == 'system.multicall') {
618
    // Return per-method results or error objects.
619
    $return = array();
620
    foreach ($message->params[0] as $result) {
621
      if (array_keys($result) == array(0)) {
622
        $return[] = $result[0];
623
      }
624
      else {
625
        $return[] = xmlrpc_error($result['faultCode'], $result['faultString']);
626
      }
627
    }
628
  }
629
  else {
630
    $return = $message->params[0];
631
  }
632
  return $return;
633
}
634

    
635
/**
636
 * Returns the last XML-RPC client error number.
637
 */
638
function xmlrpc_errno() {
639
  $error = xmlrpc_error();
640
  return ($error != NULL ? $error->code : NULL);
641
}
642

    
643
/**
644
 * Returns the last XML-RPC client error message.
645
 */
646
function xmlrpc_error_msg() {
647
  $error = xmlrpc_error();
648
  return ($error != NULL ? $error->message : NULL);
649
}
650

    
651
/**
652
 * Clears any previously-saved errors.
653
 *
654
 * @see xmlrpc_error()
655
 */
656
function xmlrpc_clear_error() {
657
  xmlrpc_error(NULL, NULL, TRUE);
658
}