This file is indexed.

/usr/share/php/Sabre/HTTP/Client.php is in php-sabre-http 2.0.1-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
<?php

namespace Sabre\HTTP;

use
    Sabre\Event\EventEmitter;

/**
 * A rudimentary HTTP client.
 *
 * This object wraps PHP's curl extension and provides an easy way to send it a
 * Request object, and return a Response object.
 *
 * This is by no means intended as the next best HTTP client, but it does the
 * job and provides a simple integration with the rest of sabre/http.
 *
 * This client emits the following events:
 *   beforeRequest(RequestInterface $request)
 *   afterRequest(RequestInterface $request, ResponseInterface $response)
 *   error(RequestInterface $request, ResponseInterface $response, bool &$retry, int $retryCount)
 *
 * The beforeRequest event allows you to do some last minute changes to the
 * request before it's done, such as adding authentication headers.
 *
 * The afterRequest event will be emitted after the request is completed
 * succesfully.
 *
 * If a HTTP error is returned (status code higher than 399) the error event is
 * triggered. It's possible using this event to retry the request, by setting
 * retry to true.
 *
 * The amount of times a request has retried is passed as $retryCount, which
 * can be used to avoid retrying indefinitely. The first time the event is
 * called, this will be 0.
 *
 * It's also possible to intercept specific http errors, by subscribing to for
 * example 'error:401'.
 *
 * @copyright Copyright (C) 2009-2014 fruux GmbH. All rights reserved.
 * @author Evert Pot (http://evertpot.com/)
 * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
 */
class Client extends EventEmitter {

    /**
     * List of curl settings
     *
     * @var array
     */
    protected $curlSettings = [];

    /**
     * Wether or not exceptions should be thrown when a HTTP error is returned.
     *
     * @var bool
     */
    protected $throwExceptions = false;

    /**
     * Initializes the client.
     *
     * @return void
     */
    public function __construct() {

        // hhvm compatibility.
        if (!defined('CURLOPT_POSTREDIR')) {
            define('CURLOPT_POSTREDIR', 161);
        }

        $this->curlSettings = [
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_HEADER => true,
            CURLOPT_FOLLOWLOCATION => true,
            CURLOPT_MAXREDIRS => 5,
            CURLOPT_POSTREDIR => 3,
        ];

    }

    /**
     * Sends a request to a HTTP server, and returns a response.
     *
     * @param RequestInterface $request
     * @return ResponseInterface
     */
    public function send(RequestInterface $request) {

        $this->emit('beforeRequest', [$request]);

        $retryCount = 0;

        do {

            $retry = false;

            try {
                $response = $this->doRequest($request);

                $code = (int)$response->getStatus();

                // This was a HTTP error
                if ($code >= 400) {

                    $this->emit('error', [$request, $response, &$retry, $retryCount]);
                    $this->emit('error:' . $code, [$request, $response, &$retry, $retryCount]);

                }

            } catch (ClientException $e) {
                $this->emit('exception', [$request, $e, &$retry, $retryCount]);

                // If retry was still set to false, it means no event handler
                // dealt with the problem. In this case we just re-throw the
                // exception.
                if (!$retry) {
                    throw $e;
                }
            }
            if ($retry) {
                $retryCount++;
            }

        } while ($retry);

        $this->emit('afterRequest', [$request, $response]);

        if ($this->throwExceptions && $code > 399) {
            throw new ClientHttpException($response);
        }

        return $response;

    }

    /**
     * Sends a HTTP request asynchronously.
     *
     * Due to the nature of PHP, you must from time to time poll to see if any
     * new responses came in.
     *
     * After calling sendAsync, you must therefore occasionally call the poll()
     * method, or wait().
     *
     * @param RequestInterface $request
     * @param callable $success
     * @param callable $error
     * @return void
     */
    public function sendAsync(RequestInterface $request, callable $success = null, callable $error = null) {

        $this->emit('beforeRequest', [$request]);
        $this->sendAsyncInternal($request, $success, $error);
        $this->poll();

    }


    /**
     * This method checks if any http requests have gotten results, and if so,
     * call the appropriate success or error handlers.
     *
     * This method will return true if there are still requests waiting to
     * return, and false if all the work is done.
     *
     * @return bool
     */
    public function poll() {

        // nothing to do?
        if(!$this->curlMultiMap) {
            return false;
        }

        do {
            $r = curl_multi_exec(
                $this->curlMultiHandle,
                $stillRunning
            );
        } while ($r === CURLM_CALL_MULTI_PERFORM);

        do {

            messageQueue:

            $status = curl_multi_info_read(
                $this->curlMultiHandle,
                $messagesInQueue
            );
            if ($status && $status['msg'] === CURLMSG_DONE) {

                $resourceId = intval($status['handle']);
                list(
                    $request,
                    $successCallback,
                    $errorCallback,
                    $retryCount,
                ) = $this->curlMultiMap[$resourceId];

                unset($this->curlMultiMap[$resourceId]);

                $curlResult = $this->parseCurlResult(curl_multi_getcontent($status['handle']), $status['handle']);

                $retry = false;

                if ($curlResult['status'] === self::STATUS_CURLERROR) {

                    $e = new ClientException($curlResult['curl_errmsg'], $curlResult['curl_errno']);
                    $this->emit('exception', [$request, $e, &$retry, $retryCount]);
                    if ($retry) {
                        $retryCount++;
                        $this->sendASyncInternal($request, $successCallback, $errorCallback, $retryCount);
                        goto messageQueue;
                    }
                    $curlResult['request'] = $request;
                    if ($errorCallback) {
                        $errorCallback($curlResult);
                    }

                } elseif ($curlResult['status'] === self::STATUS_HTTPERROR) {

                    $this->emit('error', [$request, $curlResult['response'], &$retry, $retryCount]);
                    $this->emit('error:' . $curlResult['http_code'], [$request, $curlResult['response'], &$retry, $retryCount]);

                    if ($retry) {
                        $retryCount++;
                        $this->sendASyncInternal($request, $successCallback, $errorCallback, $retryCount);
                        goto messageQueue;
                    }
                    $curlResult['request'] = $request;
                    if ($errorCallback) {
                        $errorCallback($curlResult);
                    }
                } else {
                    $this->emit('afterRequest', [$request, $curlResult['response']]);
                    if ($successCallback) {
                        $successCallback($curlResult['response']);
                    }
                }
            }
        } while ($messagesInQueue > 0);

        return $stillRunning;

    }

    /**
     * Processes every HTTP request in the queue, and waits till they are all
     * completed.
     *
     * @return void
     */
    public function wait() {

        do {
            curl_multi_select($this->curlMultiHandle);
            $stillRunning = $this->poll();
        } while ($stillRunning);

    }

    /**
     * If this is set to true, the Client will automatically throw exceptions
     * upon http errors.
     *
     * This means that if a response came back with a status code of 400 or
     * higher, we will throw a ClientHttpException.
     *
     * This only works for the send() method. Throwing exceptions for
     * sendAsync() is not supported.
     *
     * @param bool $throwExceptions
     * @return void
     */
    public function setThrowExceptions($throwExceptions) {

        $this->throwExceptions = $throwExceptions;

    }

    /**
     * Adds a CURL setting.
     *
     * These settings will be included in every HTTP request.
     *
     * @param int $name
     * @param mixed $value
     * @return void
     */
    public function addCurlSetting($name, $value) {

        $this->curlSettings[$name] = $value;

    }

    /**
     * This method is responsible for performing a single request.
     *
     * @param RequestInterface $request
     * @return ResponseInterface
     */
    protected function doRequest(RequestInterface $request) {

        $settings = $this->createCurlSettingsArray($request);

        if (!$this->curlHandle) {
            $this->curlHandle = curl_init();
        }

        curl_setopt_array($this->curlHandle, $settings);
        $response = $this->curlExec($this->curlHandle);

        $response = $this->parseCurlResult($response, $this->curlHandle);

        if ($response['status'] === self::STATUS_CURLERROR) {
            throw new ClientException($response['curl_errmsg'], $response['curl_errno']);
        }

        return $response['response'];

    }

    /**
     * Cached curl handle.
     *
     * By keeping this resource around for the lifetime of this object, things
     * like persistent connections are possible.
     *
     * @var resource
     */
    private $curlHandle;

    /**
     * Handler for curl_multi requests.
     *
     * The first time sendAsync is used, this will be created.
     *
     * @var resource
     */
    private $curlMultiHandle;

    /**
     * Has a list of curl handles, as well as their associated success and
     * error callbacks.
     *
     * @var array
     */
    private $curlMultiMap = [];

    /**
     * Turns a RequestInterface object into an array with settings that can be
     * fed to curl_setopt
     *
     * @param RequestInterface $request
     * @return array
     */
    protected function createCurlSettingsArray(RequestInterface $request) {

        $settings = $this->curlSettings;

        switch($request->getMethod()) {
            case 'HEAD' :
                $settings[CURLOPT_NOBODY] = true;
                $settings[CURLOPT_CUSTOMREQUEST] = 'HEAD';
                $settings[CURLOPT_POSTFIELDS] = '';
                $settings[CURLOPT_PUT] = false;
                break;
            case 'GET' :
                $settings[CURLOPT_CUSTOMREQUEST] = 'GET';
                $settings[CURLOPT_POSTFIELDS] = '';
                $settings[CURLOPT_PUT] = false;
                break;
            default :
                $body = $request->getBody();
                if (is_resource($body)) {
                    // This needs to be set to PUT, regardless of the actual
                    // method used. Without it, INFILE will be ignored for some
                    // reason.
                    $settings[CURLOPT_PUT] = true;
                    $settings[CURLOPT_INFILE] = $request->getBody();
                } else {
                    // Else, it's a string.
                    $settings[CURLOPT_POSTFIELDS] = $body;
                }
                $settings[CURLOPT_CUSTOMREQUEST] = $request->getMethod();
                break;

        }

        $nHeaders = [];
        foreach($request->getHeaders() as $key=>$value) {

            $nHeaders[] = $key . ': ' . $value;

        }
        $settings[CURLOPT_HTTPHEADER] = $nHeaders;
        $settings[CURLOPT_URL] = $request->getUrl();

        return $settings;

    }

    const STATUS_SUCCESS = 0;
    const STATUS_CURLERROR = 1;
    const STATUS_HTTPERROR = 2;

    /**
     * Parses the result of a curl call in a format that's a bit more
     * convenient to work with.
     *
     * The method returns an array with the following elements:
     *   * status - one of the 3 STATUS constants.
     *   * curl_errno - A curl error number. Only set if status is
     *                  STATUS_CURLERROR.
     *   * curl_errmsg - A current error message. Only set if status is
     *                   STATUS_CURLERROR.
     *   * response - Response object. Only set if status is STATUS_SUCCESS, or
     *                STATUS_HTTPERROR.
     *   * http_code - HTTP status code, as an int. Only set if Only set if
     *                 status is STATUS_SUCCESS, or STATUS_HTTPERROR
     *
     * @param string $response
     * @param resource $curlHandle
     * @return Response
     */
    protected function parseCurlResult($response, $curlHandle) {

        list(
            $curlInfo,
            $curlErrNo,
            $curlErrMsg
        ) = $this->curlStuff($curlHandle);

        if ($curlErrNo) {
            return [
                'status' => self::STATUS_CURLERROR,
                'curl_errno' => $curlErrNo,
                'curl_errmsg' => $curlErrMsg,
            ];
        }

        $headerBlob = substr($response, 0, $curlInfo['header_size']);
        $responseBody = substr($response, $curlInfo['header_size']);

        unset($response);

        // In the case of 100 Continue, or redirects we'll have multiple lists
        //
        // of headers for each separate HTTP response. We can easily split this
        // because they are separated by \r\n\r\n
        $headerBlob = explode("\r\n\r\n", trim($headerBlob, "\r\n"));

        // We only care about the last set of headers
        $headerBlob = $headerBlob[count($headerBlob)-1];

        // Splitting headers
        $headerBlob = explode("\r\n", $headerBlob);

        $headers = array();
        foreach($headerBlob as $header) {
            $parts = explode(':', $header, 2);
            if (count($parts)==2) {
                $headers[trim($parts[0])] = trim($parts[1]);
            }
        }

        $response = new Response();
        $response->setStatus($curlInfo['http_code']);
        $response->setHeaders($headers);
        $response->setBody($responseBody);

        $httpCode = intval($response->getStatus());

        return [
            'status'    => $httpCode >= 400 ? self::STATUS_HTTPERROR : self::STATUS_SUCCESS,
            'response'  => $response,
            'http_code' => $httpCode,
        ];

    }

    /**
     * Sends a asynchrous http request.
     *
     * We keep this in a separate method, so we can call it without triggering
     * the beforeRequest event and don't do the poll().
     *
     * @param RequestInterface $request
     * @param callable $success
     * @param callable $error
     * @param int $retryCount
     */
    protected function sendAsyncInternal(RequestInterface $request, callable $success, callable $error, $retryCount = 0) {

        if (!$this->curlMultiHandle) {
            $this->curlMultiHandle = curl_multi_init();
        }
        $curl = curl_init();
        curl_setopt_array(
            $curl,
            $this->createCurlSettingsArray($request)
        );
        curl_multi_add_handle($this->curlMultiHandle, $curl);
        $this->curlMultiMap[intval($curl)] = [
            $request,
            $success,
            $error,
            $retryCount
        ];

    }

    // @codeCoverageIgnoreStart

    /**
     * Calls curl_exec
     *
     * This method exists so it can easily be overridden and mocked.
     *
     * @param resource $curlHandle
     * @return string

     */
    protected function curlExec($curlHandle) {

        return curl_exec($curlHandle);

    }

    /**
     * Returns a bunch of information about a curl request.
     *
     * This method exists so it can easily be overridden and mocked.
     *
     * @param resource $curlHandle
     * @return array
     */
    protected function curlStuff($curlHandle) {

        return [
            curl_getinfo($curlHandle),
            curl_errno($curlHandle),
            curl_error($curlHandle),
        ];

    }
    // @codeCoverageIgnoreEnd

}