includes/HttpFunctions.php

   1 <?php
   2 /**
   3  * @defgroup HTTP HTTP
   4  */
   5
   6 /**
   7  * Various HTTP related functions
   8  * @ingroup HTTP
   9  */
  10 class Http {
  11         static $httpEngine = false;
  12
  13         /**
  14          * Perform an HTTP request
  15          * @param $method string HTTP method. Usually GET/POST
  16          * @param $url string Full URL to act on
  17          * @param $options options to pass to HttpRequest object
  18          *                               Possible keys for the array:
  19          *                                      timeout                   Timeout length in seconds
  20          *                                      postData                  An array of key-value pairs or a url-encoded form data
  21          *                                      proxy                     The proxy to use.      Will use $wgHTTPProxy (if set) otherwise.
  22          *                                      noProxy                   Override $wgHTTPProxy (if set) and don't use any proxy at all.
  23          *                                      sslVerifyHost     (curl only) Verify the SSL certificate
  24          *                                      caInfo                    (curl only) Provide CA information
  25          *                                      maxRedirects      Maximum number of redirects to follow (defaults to 5)
  26          *                                      followRedirects   Whether to follow redirects (defaults to true)
  27          * @returns mixed (bool)false on failure or a string on success
  28          */
  29         public static function request( $method, $url, $options = array() ) {
  30                 wfDebug( "HTTP: $method: $url" );
  31                 $options['method'] = strtoupper( $method );
  32                 if ( !isset( $options['timeout'] ) ) {
  33                         $options['timeout'] = 'default';
  34                 }
  35                 $req = HttpRequest::factory( $url, $options );
  36                 $status = $req->execute();
  37                 if ( $status->isOK() ) {
  38                         return $req->getContent();
  39                 } else {
  40                         return false;
  41                 }
  42         }
  43
  44         /**
  45          * Simple wrapper for Http::request( 'GET' )
  46          * @see Http::request()
  47          */
  48         public static function get( $url, $timeout = 'default', $options = array() ) {
  49                 $options['timeout'] = $timeout;
  50                 return Http::request( 'GET', $url, $options );
  51         }
  52
  53         /**
  54          * Simple wrapper for Http::request( 'POST' )
  55          * @see Http::request()
  56          */
  57         public static function post( $url, $options = array() ) {
  58                 return Http::request( 'POST', $url, $options );
  59         }
  60
  61         /**
  62          * Check if the URL can be served by localhost
  63          * @param $url string Full url to check
  64          * @return bool
  65          */
  66         public static function isLocalURL( $url ) {
  67                 global $wgCommandLineMode, $wgConf;
  68                 if ( $wgCommandLineMode ) {
  69                         return false;
  70                 }
  71
  72                 // Extract host part
  73                 $matches = array();
  74                 if ( preg_match( '!^http://([\w.-]+)[/:].*$!', $url, $matches ) ) {
  75                         $host = $matches[1];
  76                         // Split up dotwise
  77                         $domainParts = explode( '.', $host );
  78                         // Check if this domain or any superdomain is listed in $wgConf as a local virtual host
  79                         $domainParts = array_reverse( $domainParts );
  80                         for ( $i = 0; $i < count( $domainParts ); $i++ ) {
  81                                 $domainPart = $domainParts[$i];
  82                                 if ( $i == 0 ) {
  83                                         $domain = $domainPart;
  84                                 } else {
  85                                         $domain = $domainPart . '.' . $domain;
  86                                 }
  87                                 if ( $wgConf->isLocalVHost( $domain ) ) {
  88                                         return true;
  89                                 }
  90                         }
  91                 }
  92                 return false;
  93         }
  94
  95         /**
  96          * A standard user-agent we can use for external requests.
  97          * @returns string
  98          */
  99         public static function userAgent() {
 100                 global $wgVersion;
 101                 return "MediaWiki/$wgVersion";
 102         }
 103
 104         /**
 105          * Checks that the given URI is a valid one
 106          * @param $uri Mixed: URI to check for validity
 107          * @returns bool
 108          */
 109         public static function isValidURI( $uri ) {
 110                 return preg_match(
 111                         '/(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/',
 112                         $uri,
 113                         $matches
 114                 );
 115         }
 116 }
 117
 118 /**
 119  * This wrapper class will call out to curl (if available) or fallback
 120  * to regular PHP if necessary for handling internal HTTP requests.
 121  */
 122 class HttpRequest {
 123         protected $content;
 124         protected $timeout = 'default';
 125         protected $headersOnly = null;
 126         protected $postData = null;
 127         protected $proxy = null;
 128         protected $noProxy = false;
 129         protected $sslVerifyHost = true;
 130         protected $caInfo = null;
 131         protected $method = "GET";
 132         protected $reqHeaders = array();
 133         protected $url;
 134         protected $parsedUrl;
 135         protected $callback;
 136         protected $maxRedirects = 5;
 137         protected $followRedirects = true;
 138
 139         protected $cookieJar;
 140
 141         protected $headerList = array();
 142         protected $respVersion = "0.9";
 143         protected $respStatus = "0.1";
 144         protected $respHeaders = array();
 145
 146         public $status;
 147
 148         /**
 149          * @param $url   string url to use
 150          * @param $options array (optional) extra params to pass (see Http::request())
 151          */
 152         function __construct( $url, $options = array() ) {
 153                 global $wgHTTPTimeout;
 154
 155                 $this->url = $url;
 156                 $this->parsedUrl = parse_url( $url );
 157
 158                 if ( !Http::isValidURI( $this->url ) ) {
 159                         $this->status = Status::newFromFatal('http-invalid-url');
 160                 } else {
 161                         $this->status = Status::newGood( 100 ); // continue
 162                 }
 163
 164                 if ( isset($options['timeout']) && $options['timeout'] != 'default' ) {
 165                         $this->timeout = $options['timeout'];
 166                 } else {
 167                         $this->timeout = $wgHTTPTimeout;
 168                 }
 169
 170                 $members = array( "postData", "proxy", "noProxy", "sslVerifyHost", "caInfo",
 171                                                   "method", "followRedirects", "maxRedirects" );
 172                 foreach ( $members as $o ) {
 173                         if ( isset($options[$o]) ) {
 174                                 $this->$o = $options[$o];
 175                         }
 176                 }
 177         }
 178
 179         /**
 180          * Generate a new request object
 181          * @see HttpRequest::__construct
 182          */
 183         public static function factory( $url, $options = null ) {
 184                 if ( !Http::$httpEngine ) {
 185                         Http::$httpEngine = function_exists( 'curl_init' ) ? 'curl' : 'php';
 186                 } elseif ( Http::$httpEngine == 'curl' && !function_exists( 'curl_init' ) ) {
 187                         throw new MWException( __METHOD__.': curl (http://php.net/curl) is not installed, but'.
 188                                                                    ' Http::$httpEngine is set to "curl"' );
 189                 }
 190
 191                 switch( Http::$httpEngine ) {
 192                 case 'curl':
 193                         return new CurlHttpRequest( $url, $options );
 194                 case 'php':
 195                         if ( !wfIniGetBool( 'allow_url_fopen' ) ) {
 196                                 throw new MWException( __METHOD__.': allow_url_fopen needs to be enabled for pure PHP'.
 197                                         ' http requests to work. If possible, curl should be used instead. See http://php.net/curl.' );
 198                         }
 199                         return new PhpHttpRequest( $url, $options );
 200                 default:
 201                         throw new MWException( __METHOD__.': The setting of Http::$httpEngine is not valid.' );
 202                 }
 203         }
 204
 205         /**
 206          * Get the body, or content, of the response to the request
 207          * @return string
 208          */
 209         public function getContent() {
 210                 return $this->content;
 211         }
 212
 213         /**
 214          * Take care of setting up the proxy
 215          * (override in subclass)
 216          * @return string
 217          */
 218         public function proxySetup() {
 219                 global $wgHTTPProxy;
 220
 221                 if ( $this->proxy ) {
 222                         return;
 223                 }
 224                 if ( Http::isLocalURL( $this->url ) ) {
 225                         $this->proxy = 'http://localhost:80/';
 226                 } elseif ( $wgHTTPProxy ) {
 227                         $this->proxy = $wgHTTPProxy ;
 228                 }
 229         }
 230
 231         /**
 232          * Set the refererer header
 233          */
 234         public function setReferer( $url ) {
 235                 $this->setHeader('Referer', $url);
 236         }
 237
 238         /**
 239          * Set the user agent
 240          */
 241         public function setUserAgent( $UA ) {
 242                 $this->setHeader('User-Agent', $UA);
 243         }
 244
 245         /**
 246          * Set an arbitrary header
 247          */
 248         public function setHeader($name, $value) {
 249                 // I feel like I should normalize the case here...
 250                 $this->reqHeaders[$name] = $value;
 251         }
 252
 253         /**
 254          * Get an array of the headers
 255          */
 256         public function getHeaderList() {
 257                 $list = array();
 258
 259                 if( $this->cookieJar ) {
 260                         $this->reqHeaders['Cookie'] = $this->cookieJar->serializeToHttpRequest();
 261                 }
 262                 foreach($this->reqHeaders as $name => $value) {
 263                         $list[] = "$name: $value";
 264                 }
 265                 return $list;
 266         }
 267
 268         /**
 269          * Set the callback
 270          * @param $callback callback
 271          */
 272         public function setCallback( $callback ) {
 273                 $this->callback = $callback;
 274         }
 275
 276         /**
 277          * A generic callback to read the body of the response from a remote
 278          * server.
 279          * @param $fh handle
 280          * @param $content string
 281          */
 282         public function read( $fh, $content ) {
 283                 $this->content .= $content;
 284                 return strlen( $content );
 285         }
 286
 287         /**
 288          * Take care of whatever is necessary to perform the URI request.
 289          * @return Status
 290          */
 291         public function execute() {
 292                 global $wgTitle;
 293
 294                 if( strtoupper($this->method) == "HEAD" ) {
 295                         $this->headersOnly = true;
 296                 }
 297
 298                 if ( is_array( $this->postData ) ) {
 299                         $this->postData = wfArrayToCGI( $this->postData );
 300                 }
 301
 302                 if ( is_object( $wgTitle ) && !isset($this->reqHeaders['Referer']) ) {
 303                         $this->setReferer( $wgTitle->getFullURL() );
 304                 }
 305
 306                 if ( !$this->noProxy ) {
 307                         $this->proxySetup();
 308                 }
 309
 310                 if ( !$this->callback ) {
 311                         $this->setCallback( array( $this, 'read' ) );
 312                 }
 313
 314                 if ( !isset($this->reqHeaders['User-Agent']) ) {
 315                         $this->setUserAgent(Http::userAgent());
 316                 }
 317         }
 318
 319         protected function parseHeader() {
 320                 $lastname = "";
 321                 foreach( $this->headerList as $header ) {
 322                         if( preg_match( "#^HTTP/([0-9.]+) (.*)#", $header, $match ) ) {
 323                                 $this->respVersion = $match[1];
 324                                 $this->respStatus = $match[2];
 325                         } elseif( preg_match( "#^[ \t]#", $header ) ) {
 326                                 $last = count($this->respHeaders[$lastname]) - 1;
 327                                 $this->respHeaders[$lastname][$last] .= "\r\n$header";
 328                         } elseif( preg_match( "#^([^:]*):[\t ]*(.*)#", $header, $match ) ) {
 329                                 $this->respHeaders[strtolower( $match[1] )][] = $match[2];
 330                                 $lastname = strtolower( $match[1] );
 331                         }
 332                 }
 333
 334                 $this->parseCookies();
 335         }
 336
 337         /**
 338          * Returns an associative array of response headers after the
 339          * request has been executed.  Because some headers
 340          * (e.g. Set-Cookie) can appear more than once the, each value of
 341          * the associative array is an array of the values given.
 342          * @return array
 343          */
 344         public function getResponseHeaders() {
 345                 if( !$this->respHeaders ) {
 346                         $this->parseHeader();
 347                 }
 348                 return $this->respHeaders;
 349         }
 350
 351         /**
 352          * Tells the HttpRequest object to use this pre-loaded CookieJar.
 353          * @param $jar CookieJar
 354          */
 355         public function setCookieJar( $jar ) {
 356                 $this->cookieJar = $jar;
 357         }
 358
 359         /**
 360          * Returns the cookie jar in use.
 361          * @returns CookieJar
 362          */
 363         public function getCookieJar() {
 364                 if( !$this->respHeaders ) {
 365                         $this->parseHeader();
 366                 }
 367                 return $this->cookieJar;
 368         }
 369
 370         /**
 371          * Sets a cookie.  Used before a request to set up any individual
 372          * cookies.      Used internally after a request to parse the
 373          * Set-Cookie headers.
 374          * @see Cookie::set
 375          */
 376         public function setCookie( $name, $value = null, $attr = null) {
 377                 if( !$this->cookieJar ) {
 378                         $this->cookieJar = new CookieJar;
 379                 }
 380                 $this->cookieJar->setCookie($name, $value, $attr);
 381         }
 382
 383         /**
 384          * Parse the cookies in the response headers and store them in the cookie jar.
 385          */
 386         protected function parseCookies() {
 387                 if( isset( $this->respHeaders['set-cookie'] ) ) {
 388                         if( !$this->cookieJar ) {
 389                                 $this->cookieJar = new CookieJar;
 390                         }
 391                         $url = parse_url( $this->getFinalUrl() );
 392                         foreach( $this->respHeaders['set-cookie'] as $cookie ) {
 393                                 $this->cookieJar->parseCookieResponseHeader( $cookie, $url['host'] );
 394                         }
 395                 }
 396         }
 397
 398         /**
 399          * Returns the final URL after all redirections.
 400          * @returns string
 401          */
 402         public function getFinalUrl() {
 403                 $finalUrl = $this->url;
 404                 if ( isset( $this->respHeaders['location'] ) ) {
 405                         $redir = $this->respHeaders['location'];
 406                         $finalUrl = $redir[count($redir) - 1];
 407                 }
 408
 409                 return $finalUrl;
 410         }
 411 }
 412
 413
 414 class Cookie {
 415         protected $name;
 416         protected $value;
 417         protected $expires;
 418         protected $path;
 419         protected $domain;
 420         protected $isSessionKey = true;
 421         // TO IMPLEMENT  protected $secure
 422         // TO IMPLEMENT? protected $maxAge (add onto expires)
 423         // TO IMPLEMENT? protected $version
 424         // TO IMPLEMENT? protected $comment
 425
 426         function __construct( $name, $value, $attr ) {
 427                 $this->name = $name;
 428                 $this->set( $value, $attr );
 429         }
 430
 431         /**
 432          * Sets a cookie.  Used before a request to set up any individual
 433          * cookies.      Used internally after a request to parse the
 434          * Set-Cookie headers.
 435          * @param $name string the name of the cookie
 436          * @param $value string the value of the cookie
 437          * @param $attr array possible key/values:
 438          *              expires  A date string
 439          *              path     The path this cookie is used on
 440          *              domain   Domain this cookie is used on
 441          */
 442         public function set( $value, $attr ) {
 443                 $this->value = $value;
 444                 if( isset( $attr['expires'] ) ) {
 445                         $this->isSessionKey = false;
 446                         $this->expires = strtotime( $attr['expires'] );
 447                 }
 448                 if( isset( $attr['path'] ) ) {
 449                         $this->path = $attr['path'];
 450                 } else {
 451                         $this->path = "/";
 452                 }
 453                 if( isset( $attr['domain'] ) ) {
 454                         $this->domain = $attr['domain'];
 455                 } else {
 456                         throw new MWException("You must specify a domain.");
 457                 }
 458         }
 459
 460         /**
 461          * Serialize the cookie jar into a format useful for HTTP Request headers.
 462          * @param $path string the path that will be used. Required.
 463          * @param $domain string the domain that will be used. Required.
 464          * @return string
 465          */
 466         public function serializeToHttpRequest( $path, $domain ) {
 467                 $ret = "";
 468
 469                 if( $this->canServeDomain( $domain )
 470                                 && $this->canServePath( $path )
 471                                 && $this->isUnExpired() ) {
 472                         $ret = $this->name ."=". $this->value;
 473                 }
 474
 475                 return $ret;
 476         }
 477
 478         protected function canServeDomain( $domain ) {
 479                 if( $this->domain && substr_compare( $domain, $this->domain, -strlen( $this->domain ),
 480                                                                                          strlen( $this->domain ), TRUE ) == 0 ) {
 481                         return true;
 482                 }
 483                 return false;
 484         }
 485
 486         protected function canServePath( $path ) {
 487                 if( $this->path && substr_compare( $this->path, $path, 0, strlen( $this->path ) ) == 0 ) {
 488                         return true;
 489                 }
 490                 return false;
 491         }
 492
 493         protected function isUnExpired() {
 494                 if( $this->isSessionKey || $this->expires > time() ) {
 495                         return true;
 496                 }
 497                 return false;
 498         }
 499
 500 }
 501
 502 class CookieJar {
 503         private $cookie;
 504
 505         /**
 506          * Set a cookie in the cookie jar.      Make sure only one cookie per-name exists.
 507          * @see Cookie::set()
 508          */
 509         public function setCookie ($name, $value, $attr) {
 510                 /* cookies: case insensitive, so this should work.
 511                  * We'll still send the cookies back in the same case we got them, though.
 512                  */
 513                 $index = strtoupper($name);
 514                 if( isset( $this->cookie[$index] ) ) {
 515                         $this->cookie[$index]->set( $value, $attr );
 516                 } else {
 517                         $this->cookie[$index] = new Cookie( $name, $value, $attr );
 518                 }
 519         }
 520
 521         /**
 522          * @see Cookie::serializeToHttpRequest
 523          */
 524         public function serializeToHttpRequest( $path, $domain ) {
 525                 $cookies = array();
 526
 527                 foreach( $this->cookie as $c ) {
 528                         $serialized = $c->serializeToHttpRequest( $path, $domain );
 529                         if ( $serialized ) $cookies[] = $serialized;
 530                 }
 531
 532                 return implode("; ", $cookies);
 533         }
 534
 535         /**
 536          * Parse the content of an Set-Cookie HTTP Response header.
 537          * @param $cookie string
 538          */
 539         public function parseCookieResponseHeader ( $cookie, $domain = null ) {
 540                 $len = strlen( "Set-Cookie:" );
 541                 if ( substr_compare( "Set-Cookie:", $cookie, 0, $len, TRUE ) === 0 ) {
 542                         $cookie = substr( $cookie, $len );
 543                 }
 544
 545                 $bit = array_map( 'trim', explode( ";", $cookie ) );
 546                 list($name, $value) = explode( "=", array_shift( $bit ), 2 );
 547                 $attr = array();
 548                 foreach( $bit as $piece ) {
 549                         $parts = explode( "=", $piece );
 550                         if( count( $parts ) > 1 ) {
 551                                 $attr[strtolower( $parts[0] )] = $parts[1];
 552                         } else {
 553                                 $attr[strtolower( $parts[0] )] = true;
 554                         }
 555                 }
 556                 $this->setCookie( $name, $value, $attr );
 557         }
 558 }
 559
 560
 561 /**
 562  * HttpRequest implemented using internal curl compiled into PHP
 563  */
 564 class CurlHttpRequest extends HttpRequest {
 565         static $curlMessageMap = array(
 566                 6 => 'http-host-unreachable',
 567                 28 => 'http-timed-out'
 568         );
 569
 570         protected $curlOptions = array();
 571         protected $headerText = "";
 572
 573         protected function readHeader( $fh, $content ) {
 574                 $this->headerText .= $content;
 575                 return strlen( $content );
 576         }
 577
 578         public function execute() {
 579                 parent::execute();
 580                 if ( !$this->status->isOK() ) {
 581                         return $this->status;
 582                 }
 583                 $this->curlOptions[CURLOPT_PROXY] = $this->proxy;
 584                 $this->curlOptions[CURLOPT_TIMEOUT] = $this->timeout;
 585                 $this->curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_0;
 586                 $this->curlOptions[CURLOPT_WRITEFUNCTION] = $this->callback;
 587                 $this->curlOptions[CURLOPT_HEADERFUNCTION] = array($this, "readHeader");
 588                 $this->curlOptions[CURLOPT_FOLLOWLOCATION] = $this->followRedirects;
 589                 $this->curlOptions[CURLOPT_MAXREDIRS] = $this->maxRedirects;
 590
 591                 /* not sure these two are actually necessary */
 592                 if(isset($this->reqHeaders['Referer'])) {
 593                         $this->curlOptions[CURLOPT_REFERER] = $this->reqHeaders['Referer'];
 594                 }
 595                 $this->curlOptions[CURLOPT_USERAGENT] = $this->reqHeaders['User-Agent'];
 596
 597                 if ( $this->sslVerifyHost ) {
 598                         $this->curlOptions[CURLOPT_SSL_VERIFYHOST] = $this->sslVerifyHost;
 599                 }
 600
 601                 if ( $this->caInfo ) {
 602                         $this->curlOptions[CURLOPT_CAINFO] = $this->caInfo;
 603                 }
 604
 605                 if ( $this->headersOnly ) {
 606                         $this->curlOptions[CURLOPT_NOBODY] = true;
 607                         $this->curlOptions[CURLOPT_HEADER] = true;
 608                 } elseif ( $this->method == 'POST' ) {
 609                         $this->curlOptions[CURLOPT_POST] = true;
 610                         $this->curlOptions[CURLOPT_POSTFIELDS] = $this->postData;
 611                         // Suppress 'Expect: 100-continue' header, as some servers
 612                         // will reject it with a 417 and Curl won't auto retry
 613                         // with HTTP 1.0 fallback
 614                         $this->reqHeaders['Expect'] = '';
 615                 } else {
 616                         $this->curlOptions[CURLOPT_CUSTOMREQUEST] = $this->method;
 617                 }
 618
 619                 $this->curlOptions[CURLOPT_HTTPHEADER] = $this->getHeaderList();
 620
 621                 $curlHandle = curl_init( $this->url );
 622                 curl_setopt_array( $curlHandle, $this->curlOptions );
 623
 624                 if ( false === curl_exec( $curlHandle ) ) {
 625                         $code = curl_error( $curlHandle );
 626
 627                         if ( isset( self::$curlMessageMap[$code] ) ) {
 628                                 $this->status->fatal( self::$curlMessageMap[$code] );
 629                         } else {
 630                                 $this->status->fatal( 'http-curl-error', curl_error( $curlHandle ) );
 631                         }
 632                 } else {
 633                         $this->headerList = explode("\r\n", $this->headerText);
 634                 }
 635
 636                 curl_close( $curlHandle );
 637
 638                 return $this->status;
 639         }
 640 }
 641
 642 class PhpHttpRequest extends HttpRequest {
 643         protected function urlToTcp( $url ) {
 644                 $parsedUrl = parse_url( $url );
 645
 646                 return 'tcp://' . $parsedUrl['host'] . ':' . $parsedUrl['port'];
 647         }
 648
 649         public function execute() {
 650                 if ( $this->parsedUrl['scheme'] != 'http' ) {
 651                         $this->status->fatal( 'http-invalid-scheme', $this->parsedURL['scheme'] );
 652                 }
 653
 654                 parent::execute();
 655                 if ( !$this->status->isOK() ) {
 656                         return $this->status;
 657                 }
 658
 659                 $this->reqHeaders['Accept'] = "*/*";
 660                 if ( $this->method == 'POST' ) {
 661                         // Required for HTTP 1.0 POSTs
 662                         $this->reqHeaders['Content-Length'] = strlen( $this->postData );
 663                         $this->reqHeaders['Content-type'] = "application/x-www-form-urlencoded";
 664                 }
 665
 666                 $options = array();
 667                 if ( $this->proxy && !$this->noProxy ) {
 668                         $options['proxy'] = $this->urlToTCP( $this->proxy );
 669                         $options['request_fulluri'] = true;
 670                 }
 671
 672                 if ( !$this->followRedirects ) {
 673                         $options['max_redirects'] = 0;
 674                 } else {
 675                         $options['max_redirects'] = $this->maxRedirects;
 676                 }
 677
 678                 $options['method'] = $this->method;
 679                 $options['timeout'] = $this->timeout;
 680                 $options['header'] = implode("\r\n", $this->getHeaderList());
 681                 // Note that at some future point we may want to support
 682                 // HTTP/1.1, but we'd have to write support for chunking
 683                 // in version of PHP < 5.3.1
 684                 $options['protocol_version'] = "1.0";
 685
 686                 if ( $this->postData ) {
 687                         $options['content'] = $this->postData;
 688                 }
 689
 690                 $oldTimeout = false;
 691                 if ( version_compare( '5.2.1', phpversion(), '>' ) ) {
 692                         $oldTimeout = ini_set('default_socket_timeout', $this->timeout);
 693                 }
 694
 695                 $context = stream_context_create( array( 'http' => $options ) );
 696                 wfSuppressWarnings();
 697                 $fh = fopen( $this->url, "r", false, $context );
 698                 wfRestoreWarnings();
 699                 if ( $oldTimeout !== false ) {
 700                         ini_set('default_socket_timeout', $oldTimeout);
 701                 }
 702                 if ( $fh === false ) {
 703                         $this->status->fatal( 'http-request-error' );
 704                         return $this->status;
 705                 }
 706
 707                 $result = stream_get_meta_data( $fh );
 708                 if ( $result['timed_out'] ) {
 709                         $this->status->fatal( 'http-timed-out', $this->url );
 710                         return $this->status;
 711                 }
 712                 $this->headerList = $result['wrapper_data'];
 713
 714                 while ( !feof( $fh ) ) {
 715                         $buf = fread( $fh, 8192 );
 716                         if ( $buf === false ) {
 717                                 $this->status->fatal( 'http-read-error' );
 718                                 break;
 719                         }
 720                         if ( strlen( $buf ) ) {
 721                                 call_user_func( $this->callback, $fh, $buf );
 722                         }
 723                 }
 724                 fclose( $fh );
 725
 726                 return $this->status;
 727         }
 728 }