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          *
  16          * @param $method String: HTTP method. Usually GET/POST
  17          * @param $url String: full URL to act on. If protocol-relative, will be expanded to an http:// URL
  18          * @param $options Array: options to pass to MWHttpRequest object.
  19          *      Possible keys for the array:
  20          *    - timeout             Timeout length in seconds
  21          *    - postData            An array of key-value pairs or a url-encoded form data
  22          *    - proxy               The proxy to use.
  23          *                          Will use $wgHTTPProxy (if set) otherwise.
  24          *    - noProxy             Override $wgHTTPProxy (if set) and don't use any proxy at all.
  25          *    - sslVerifyHost       (curl only) Verify hostname against certificate
  26          *    - sslVerifyCert       (curl only) Verify SSL certificate
  27          *    - caInfo              (curl only) Provide CA information
  28          *    - maxRedirects        Maximum number of redirects to follow (defaults to 5)
  29          *    - followRedirects     Whether to follow redirects (defaults to false).
  30          *                                  Note: this should only be used when the target URL is trusted,
  31          *                                  to avoid attacks on intranet services accessible by HTTP.
  32          *    - userAgent           A user agent, if you want to override the default
  33          *                          MediaWiki/$wgVersion
  34          * @return Mixed: (bool)false on failure or a string on success
  35          */
  36         public static function request( $method, $url, $options = array() ) {
  37                 wfDebug( "HTTP: $method: $url\n" );
  38                 $options['method'] = strtoupper( $method );
  39
  40                 if ( !isset( $options['timeout'] ) ) {
  41                         $options['timeout'] = 'default';
  42                 }
  43
  44                 $req = MWHttpRequest::factory( $url, $options );
  45                 if( isset( $options['userAgent'] ) ) {
  46                         $req->setUserAgent( $options['userAgent'] );
  47                 }
  48                 $status = $req->execute();
  49
  50                 if ( $status->isOK() ) {
  51                         return $req->getContent();
  52                 } else {
  53                         return false;
  54                 }
  55         }
  56
  57         /**
  58          * Simple wrapper for Http::request( 'GET' )
  59          * @see Http::request()
  60          *
  61          * @param $url
  62          * @param $timeout string
  63          * @param $options array
  64          * @return string
  65          */
  66         public static function get( $url, $timeout = 'default', $options = array() ) {
  67                 $options['timeout'] = $timeout;
  68                 return Http::request( 'GET', $url, $options );
  69         }
  70
  71         /**
  72          * Simple wrapper for Http::request( 'POST' )
  73          * @see Http::request()
  74          *
  75          * @param $url
  76          * @param $options array
  77          * @return string
  78          */
  79         public static function post( $url, $options = array() ) {
  80                 return Http::request( 'POST', $url, $options );
  81         }
  82
  83         /**
  84          * Check if the URL can be served by localhost
  85          *
  86          * @param $url String: full url to check
  87          * @return Boolean
  88          */
  89         public static function isLocalURL( $url ) {
  90                 global $wgCommandLineMode, $wgConf;
  91
  92                 if ( $wgCommandLineMode ) {
  93                         return false;
  94                 }
  95
  96                 // Extract host part
  97                 $matches = array();
  98                 if ( preg_match( '!^http://([\w.-]+)[/:].*$!', $url, $matches ) ) {
  99                         $host = $matches[1];
 100                         // Split up dotwise
 101                         $domainParts = explode( '.', $host );
 102                         // Check if this domain or any superdomain is listed in $wgConf as a local virtual host
 103                         $domainParts = array_reverse( $domainParts );
 104
 105                         $domain = '';
 106                         for ( $i = 0; $i < count( $domainParts ); $i++ ) {
 107                                 $domainPart = $domainParts[$i];
 108                                 if ( $i == 0 ) {
 109                                         $domain = $domainPart;
 110                                 } else {
 111                                         $domain = $domainPart . '.' . $domain;
 112                                 }
 113
 114                                 if ( $wgConf->isLocalVHost( $domain ) ) {
 115                                         return true;
 116                                 }
 117                         }
 118                 }
 119
 120                 return false;
 121         }
 122
 123         /**
 124          * A standard user-agent we can use for external requests.
 125          * @return String
 126          */
 127         public static function userAgent() {
 128                 global $wgVersion;
 129                 return "MediaWiki/$wgVersion";
 130         }
 131
 132         /**
 133          * Checks that the given URI is a valid one. Hardcoding the
 134          * protocols, because we only want protocols that both cURL
 135          * and php support.
 136          *
 137          * file:// should not be allowed here for security purpose (r67684)
 138          *
 139          * @fixme this is wildly inaccurate and fails to actually check most stuff
 140          *
 141          * @param $uri Mixed: URI to check for validity
 142          * @return Boolean
 143          */
 144         public static function isValidURI( $uri ) {
 145                 return preg_match(
 146                         '/^https?:\/\/[^\/\s]\S*$/D',
 147                         $uri
 148                 );
 149         }
 150 }
 151
 152 /**
 153  * This wrapper class will call out to curl (if available) or fallback
 154  * to regular PHP if necessary for handling internal HTTP requests.
 155  *
 156  * Renamed from HttpRequest to MWHttpRequest to avoid conflict with
 157  * PHP's HTTP extension.
 158  */
 159 class MWHttpRequest {
 160         const SUPPORTS_FILE_POSTS = false;
 161
 162         protected $content;
 163         protected $timeout = 'default';
 164         protected $headersOnly = null;
 165         protected $postData = null;
 166         protected $proxy = null;
 167         protected $noProxy = false;
 168         protected $sslVerifyHost = true;
 169         protected $sslVerifyCert = true;
 170         protected $caInfo = null;
 171         protected $method = "GET";
 172         protected $reqHeaders = array();
 173         protected $url;
 174         protected $parsedUrl;
 175         protected $callback;
 176         protected $maxRedirects = 5;
 177         protected $followRedirects = false;
 178
 179         /**
 180          * @var  CookieJar
 181          */
 182         protected $cookieJar;
 183
 184         protected $headerList = array();
 185         protected $respVersion = "0.9";
 186         protected $respStatus = "200 Ok";
 187         protected $respHeaders = array();
 188
 189         public $status;
 190
 191         /**
 192          * @param $url String: url to use. If protocol-relative, will be expanded to an http:// URL
 193          * @param $options Array: (optional) extra params to pass (see Http::request())
 194          */
 195         function __construct( $url, $options = array() ) {
 196                 global $wgHTTPTimeout;
 197
 198                 $this->url = wfExpandUrl( $url, PROTO_HTTP );
 199                 $this->parsedUrl = wfParseUrl( $this->url );
 200
 201                 if ( !$this->parsedUrl || !Http::isValidURI( $this->url ) ) {
 202                         $this->status = Status::newFatal( 'http-invalid-url' );
 203                 } else {
 204                         $this->status = Status::newGood( 100 ); // continue
 205                 }
 206
 207                 if ( isset( $options['timeout'] ) && $options['timeout'] != 'default' ) {
 208                         $this->timeout = $options['timeout'];
 209                 } else {
 210                         $this->timeout = $wgHTTPTimeout;
 211                 }
 212
 213                 $members = array( "postData", "proxy", "noProxy", "sslVerifyHost", "caInfo",
 214                                   "method", "followRedirects", "maxRedirects", "sslVerifyCert", "callback" );
 215
 216                 foreach ( $members as $o ) {
 217                         if ( isset( $options[$o] ) ) {
 218                                 $this->$o = $options[$o];
 219                         }
 220                 }
 221         }
 222
 223         /**
 224          * Simple function to test if we can make any sort of requests at all, using
 225          * cURL or fopen()
 226          * @return bool
 227          */
 228         public static function canMakeRequests() {
 229                 return function_exists( 'curl_init' ) || wfIniGetBool( 'allow_url_fopen' );
 230         }
 231
 232         /**
 233          * Generate a new request object
 234          * @param $url String: url to use
 235          * @param $options Array: (optional) extra params to pass (see Http::request())
 236          * @return CurlHttpRequest|PhpHttpRequest
 237          * @see MWHttpRequest::__construct
 238          */
 239         public static function factory( $url, $options = null ) {
 240                 if ( !Http::$httpEngine ) {
 241                         Http::$httpEngine = function_exists( 'curl_init' ) ? 'curl' : 'php';
 242                 } elseif ( Http::$httpEngine == 'curl' && !function_exists( 'curl_init' ) ) {
 243                         throw new MWException( __METHOD__ . ': curl (http://php.net/curl) is not installed, but' .
 244                                                                    ' Http::$httpEngine is set to "curl"' );
 245                 }
 246
 247                 switch( Http::$httpEngine ) {
 248                         case 'curl':
 249                                 return new CurlHttpRequest( $url, $options );
 250                         case 'php':
 251                                 if ( !wfIniGetBool( 'allow_url_fopen' ) ) {
 252                                         throw new MWException( __METHOD__ . ': allow_url_fopen needs to be enabled for pure PHP' .
 253                                                 ' http requests to work. If possible, curl should be used instead. See http://php.net/curl.' );
 254                                 }
 255                                 return new PhpHttpRequest( $url, $options );
 256                         default:
 257                                 throw new MWException( __METHOD__ . ': The setting of Http::$httpEngine is not valid.' );
 258                 }
 259         }
 260
 261         /**
 262          * Get the body, or content, of the response to the request
 263          *
 264          * @return String
 265          */
 266         public function getContent() {
 267                 return $this->content;
 268         }
 269
 270         /**
 271          * Set the parameters of the request
 272
 273          * @param $args Array
 274          * @todo overload the args param
 275          */
 276         public function setData( $args ) {
 277                 $this->postData = $args;
 278         }
 279
 280         /**
 281          * Take care of setting up the proxy
 282          * (override in subclass)
 283          *
 284          * @return String
 285          */
 286         public function proxySetup() {
 287                 global $wgHTTPProxy;
 288
 289                 if ( $this->proxy ) {
 290                         return;
 291                 }
 292
 293                 if ( Http::isLocalURL( $this->url ) ) {
 294                         $this->proxy = '';
 295                 } elseif ( $wgHTTPProxy ) {
 296                         $this->proxy = $wgHTTPProxy ;
 297                 } elseif ( getenv( "http_proxy" ) ) {
 298                         $this->proxy = getenv( "http_proxy" );
 299                 }
 300         }
 301
 302         /**
 303          * Set the refererer header
 304          */
 305         public function setReferer( $url ) {
 306                 $this->setHeader( 'Referer', $url );
 307         }
 308
 309         /**
 310          * Set the user agent
 311          * @param $UA string
 312          */
 313         public function setUserAgent( $UA ) {
 314                 $this->setHeader( 'User-Agent', $UA );
 315         }
 316
 317         /**
 318          * Set an arbitrary header
 319          * @param $name
 320          * @param $value
 321          */
 322         public function setHeader( $name, $value ) {
 323                 // I feel like I should normalize the case here...
 324                 $this->reqHeaders[$name] = $value;
 325         }
 326
 327         /**
 328          * Get an array of the headers
 329          * @return array
 330          */
 331         public function getHeaderList() {
 332                 $list = array();
 333
 334                 if ( $this->cookieJar ) {
 335                         $this->reqHeaders['Cookie'] =
 336                                 $this->cookieJar->serializeToHttpRequest(
 337                                         $this->parsedUrl['path'],
 338                                         $this->parsedUrl['host']
 339                                 );
 340                 }
 341
 342                 foreach ( $this->reqHeaders as $name => $value ) {
 343                         $list[] = "$name: $value";
 344                 }
 345
 346                 return $list;
 347         }
 348
 349         /**
 350          * Set a read callback to accept data read from the HTTP request.
 351          * By default, data is appended to an internal buffer which can be
 352          * retrieved through $req->getContent().
 353          *
 354          * To handle data as it comes in -- especially for large files that
 355          * would not fit in memory -- you can instead set your own callback,
 356          * in the form function($resource, $buffer) where the first parameter
 357          * is the low-level resource being read (implementation specific),
 358          * and the second parameter is the data buffer.
 359          *
 360          * You MUST return the number of bytes handled in the buffer; if fewer
 361          * bytes are reported handled than were passed to you, the HTTP fetch
 362          * will be aborted.
 363          *
 364          * @param $callback Callback
 365          */
 366         public function setCallback( $callback ) {
 367                 if ( !is_callable( $callback ) ) {
 368                         throw new MWException( 'Invalid MwHttpRequest callback' );
 369                 }
 370                 $this->callback = $callback;
 371         }
 372
 373         /**
 374          * A generic callback to read the body of the response from a remote
 375          * server.
 376          *
 377          * @param $fh handle
 378          * @param $content String
 379          * @return int
 380          */
 381         public function read( $fh, $content ) {
 382                 $this->content .= $content;
 383                 return strlen( $content );
 384         }
 385
 386         /**
 387          * Take care of whatever is necessary to perform the URI request.
 388          *
 389          * @return Status
 390          */
 391         public function execute() {
 392                 global $wgTitle;
 393
 394                 $this->content = "";
 395
 396                 if ( strtoupper( $this->method ) == "HEAD" ) {
 397                         $this->headersOnly = true;
 398                 }
 399
 400                 if ( is_object( $wgTitle ) && !isset( $this->reqHeaders['Referer'] ) ) {
 401                         $this->setReferer( wfExpandUrl( $wgTitle->getFullURL(), PROTO_CURRENT ) );
 402                 }
 403
 404                 if ( !$this->noProxy ) {
 405                         $this->proxySetup();
 406                 }
 407
 408                 if ( !$this->callback ) {
 409                         $this->setCallback( array( $this, 'read' ) );
 410                 }
 411
 412                 if ( !isset( $this->reqHeaders['User-Agent'] ) ) {
 413                         $this->setUserAgent( Http::userAgent() );
 414                 }
 415         }
 416
 417         /**
 418          * Parses the headers, including the HTTP status code and any
 419          * Set-Cookie headers.  This function expectes the headers to be
 420          * found in an array in the member variable headerList.
 421          */
 422         protected function parseHeader() {
 423                 $lastname = "";
 424
 425                 foreach ( $this->headerList as $header ) {
 426                         if ( preg_match( "#^HTTP/([0-9.]+) (.*)#", $header, $match ) ) {
 427                                 $this->respVersion = $match[1];
 428                                 $this->respStatus = $match[2];
 429                         } elseif ( preg_match( "#^[ \t]#", $header ) ) {
 430                                 $last = count( $this->respHeaders[$lastname] ) - 1;
 431                                 $this->respHeaders[$lastname][$last] .= "\r\n$header";
 432                         } elseif ( preg_match( "#^([^:]*):[\t ]*(.*)#", $header, $match ) ) {
 433                                 $this->respHeaders[strtolower( $match[1] )][] = $match[2];
 434                                 $lastname = strtolower( $match[1] );
 435                         }
 436                 }
 437
 438                 $this->parseCookies();
 439         }
 440
 441         /**
 442          * Sets HTTPRequest status member to a fatal value with the error
 443          * message if the returned integer value of the status code was
 444          * not successful (< 300) or a redirect (>=300 and < 400).  (see
 445          * RFC2616, section 10,
 446          * http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html for a
 447          * list of status codes.)
 448          */
 449         protected function setStatus() {
 450                 if ( !$this->respHeaders ) {
 451                         $this->parseHeader();
 452                 }
 453
 454                 if ( (int)$this->respStatus > 399 ) {
 455                         list( $code, $message ) = explode( " ", $this->respStatus, 2 );
 456                         $this->status->fatal( "http-bad-status", $code, $message );
 457                 }
 458         }
 459
 460         /**
 461          * Get the integer value of the HTTP status code (e.g. 200 for "200 Ok")
 462          * (see RFC2616, section 10, http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
 463          * for a list of status codes.)
 464          *
 465          * @return Integer
 466          */
 467         public function getStatus() {
 468                 if ( !$this->respHeaders ) {
 469                         $this->parseHeader();
 470                 }
 471
 472                 return (int)$this->respStatus;
 473         }
 474
 475
 476         /**
 477          * Returns true if the last status code was a redirect.
 478          *
 479          * @return Boolean
 480          */
 481         public function isRedirect() {
 482                 if ( !$this->respHeaders ) {
 483                         $this->parseHeader();
 484                 }
 485
 486                 $status = (int)$this->respStatus;
 487
 488                 if ( $status >= 300 && $status <= 303 ) {
 489                         return true;
 490                 }
 491
 492                 return false;
 493         }
 494
 495         /**
 496          * Returns an associative array of response headers after the
 497          * request has been executed.  Because some headers
 498          * (e.g. Set-Cookie) can appear more than once the, each value of
 499          * the associative array is an array of the values given.
 500          *
 501          * @return Array
 502          */
 503         public function getResponseHeaders() {
 504                 if ( !$this->respHeaders ) {
 505                         $this->parseHeader();
 506                 }
 507
 508                 return $this->respHeaders;
 509         }
 510
 511         /**
 512          * Returns the value of the given response header.
 513          *
 514          * @param $header String
 515          * @return String
 516          */
 517         public function getResponseHeader( $header ) {
 518                 if ( !$this->respHeaders ) {
 519                         $this->parseHeader();
 520                 }
 521
 522                 if ( isset( $this->respHeaders[strtolower ( $header ) ] ) ) {
 523                         $v = $this->respHeaders[strtolower ( $header ) ];
 524                         return $v[count( $v ) - 1];
 525                 }
 526
 527                 return null;
 528         }
 529
 530         /**
 531          * Tells the MWHttpRequest object to use this pre-loaded CookieJar.
 532          *
 533          * @param $jar CookieJar
 534          */
 535         public function setCookieJar( $jar ) {
 536                 $this->cookieJar = $jar;
 537         }
 538
 539         /**
 540          * Returns the cookie jar in use.
 541          *
 542          * @return CookieJar
 543          */
 544         public function getCookieJar() {
 545                 if ( !$this->respHeaders ) {
 546                         $this->parseHeader();
 547                 }
 548
 549                 return $this->cookieJar;
 550         }
 551
 552         /**
 553          * Sets a cookie.  Used before a request to set up any individual
 554          * cookies.      Used internally after a request to parse the
 555          * Set-Cookie headers.
 556          * @see Cookie::set
 557          * @param $name
 558          * @param $value null
 559          * @param $attr null
 560          */
 561         public function setCookie( $name, $value = null, $attr = null ) {
 562                 if ( !$this->cookieJar ) {
 563                         $this->cookieJar = new CookieJar;
 564                 }
 565
 566                 $this->cookieJar->setCookie( $name, $value, $attr );
 567         }
 568
 569         /**
 570          * Parse the cookies in the response headers and store them in the cookie jar.
 571          */
 572         protected function parseCookies() {
 573                 if ( !$this->cookieJar ) {
 574                         $this->cookieJar = new CookieJar;
 575                 }
 576
 577                 if ( isset( $this->respHeaders['set-cookie'] ) ) {
 578                         $url = parse_url( $this->getFinalUrl() );
 579                         foreach ( $this->respHeaders['set-cookie'] as $cookie ) {
 580                                 $this->cookieJar->parseCookieResponseHeader( $cookie, $url['host'] );
 581                         }
 582                 }
 583         }
 584
 585         /**
 586          * Returns the final URL after all redirections.
 587          *
 588          * Relative values of the "Location" header are incorrect as stated in RFC, however they do happen and modern browsers support them.
 589          * This function loops backwards through all locations in order to build the proper absolute URI - Marooned at wikia-inc.com
 590          *
 591          * Note that the multiple Location: headers are an artifact of CURL -- they
 592          * shouldn't actually get returned this way. Rewrite this when bug 29232 is
 593          * taken care of (high-level redirect handling rewrite).
 594          *
 595          * @return string
 596          */
 597         public function getFinalUrl() {
 598                 $headers = $this->getResponseHeaders();
 599
 600                 //return full url (fix for incorrect but handled relative location)
 601                 if ( isset( $headers[ 'location' ] ) ) {
 602                         $locations = $headers[ 'location' ];
 603                         $domain = '';
 604                         $foundRelativeURI = false;
 605                         $countLocations = count($locations);
 606
 607                         for ( $i = $countLocations - 1; $i >= 0; $i-- ) {
 608                                 $url = parse_url( $locations[ $i ] );
 609
 610                                 if ( isset($url[ 'host' ]) ) {
 611                                         $domain = $url[ 'scheme' ] . '://' . $url[ 'host' ];
 612                                         break;  //found correct URI (with host)
 613                                 } else {
 614                                         $foundRelativeURI = true;
 615                                 }
 616                         }
 617
 618                         if ( $foundRelativeURI ) {
 619                                 if ( $domain ) {
 620                                         return $domain . $locations[ $countLocations - 1 ];
 621                                 } else {
 622                                         $url = parse_url( $this->url );
 623                                         if ( isset($url[ 'host' ]) ) {
 624                                                 return $url[ 'scheme' ] . '://' . $url[ 'host' ] . $locations[ $countLocations - 1 ];
 625                                         }
 626                                 }
 627                         } else {
 628                                 return $locations[ $countLocations - 1 ];
 629                         }
 630                 }
 631
 632                 return $this->url;
 633         }
 634
 635         /**
 636          * Returns true if the backend can follow redirects. Overridden by the
 637          * child classes.
 638          * @return bool
 639          */
 640         public function canFollowRedirects() {
 641                 return true;
 642         }
 643 }
 644
 645 /**
 646  * MWHttpRequest implemented using internal curl compiled into PHP
 647  */
 648 class CurlHttpRequest extends MWHttpRequest {
 649         const SUPPORTS_FILE_POSTS = true;
 650
 651         static $curlMessageMap = array(
 652                 6 => 'http-host-unreachable',
 653                 28 => 'http-timed-out'
 654         );
 655
 656         protected $curlOptions = array();
 657         protected $headerText = "";
 658
 659         /**
 660          * @param $fh
 661          * @param $content
 662          * @return int
 663          */
 664         protected function readHeader( $fh, $content ) {
 665                 $this->headerText .= $content;
 666                 return strlen( $content );
 667         }
 668
 669         public function execute() {
 670                 parent::execute();
 671
 672                 if ( !$this->status->isOK() ) {
 673                         return $this->status;
 674                 }
 675
 676                 $this->curlOptions[CURLOPT_PROXY] = $this->proxy;
 677                 $this->curlOptions[CURLOPT_TIMEOUT] = $this->timeout;
 678                 $this->curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_0;
 679                 $this->curlOptions[CURLOPT_WRITEFUNCTION] = $this->callback;
 680                 $this->curlOptions[CURLOPT_HEADERFUNCTION] = array( $this, "readHeader" );
 681                 $this->curlOptions[CURLOPT_MAXREDIRS] = $this->maxRedirects;
 682                 $this->curlOptions[CURLOPT_ENCODING] = ""; # Enable compression
 683
 684                 /* not sure these two are actually necessary */
 685                 if ( isset( $this->reqHeaders['Referer'] ) ) {
 686                         $this->curlOptions[CURLOPT_REFERER] = $this->reqHeaders['Referer'];
 687                 }
 688                 $this->curlOptions[CURLOPT_USERAGENT] = $this->reqHeaders['User-Agent'];
 689
 690                 if ( isset( $this->sslVerifyHost ) ) {
 691                         $this->curlOptions[CURLOPT_SSL_VERIFYHOST] = $this->sslVerifyHost;
 692                 }
 693
 694                 if ( isset( $this->sslVerifyCert ) ) {
 695                         $this->curlOptions[CURLOPT_SSL_VERIFYPEER] = $this->sslVerifyCert;
 696                 }
 697
 698                 if ( $this->caInfo ) {
 699                         $this->curlOptions[CURLOPT_CAINFO] = $this->caInfo;
 700                 }
 701
 702                 if ( $this->headersOnly ) {
 703                         $this->curlOptions[CURLOPT_NOBODY] = true;
 704                         $this->curlOptions[CURLOPT_HEADER] = true;
 705                 } elseif ( $this->method == 'POST' ) {
 706                         $this->curlOptions[CURLOPT_POST] = true;
 707                         $this->curlOptions[CURLOPT_POSTFIELDS] = $this->postData;
 708                         // Suppress 'Expect: 100-continue' header, as some servers
 709                         // will reject it with a 417 and Curl won't auto retry
 710                         // with HTTP 1.0 fallback
 711                         $this->reqHeaders['Expect'] = '';
 712                 } else {
 713                         $this->curlOptions[CURLOPT_CUSTOMREQUEST] = $this->method;
 714                 }
 715
 716                 $this->curlOptions[CURLOPT_HTTPHEADER] = $this->getHeaderList();
 717
 718                 $curlHandle = curl_init( $this->url );
 719
 720                 if ( !curl_setopt_array( $curlHandle, $this->curlOptions ) ) {
 721                         throw new MWException( "Error setting curl options." );
 722                 }
 723
 724                 if ( $this->followRedirects && $this->canFollowRedirects() ) {
 725                         wfSuppressWarnings();
 726                         if ( ! curl_setopt( $curlHandle, CURLOPT_FOLLOWLOCATION, true ) ) {
 727                                 wfDebug( __METHOD__ . ": Couldn't set CURLOPT_FOLLOWLOCATION. " .
 728                                         "Probably safe_mode or open_basedir is set.\n" );
 729                                 // Continue the processing. If it were in curl_setopt_array,
 730                                 // processing would have halted on its entry
 731                         }
 732                         wfRestoreWarnings();
 733                 }
 734
 735                 if ( false === curl_exec( $curlHandle ) ) {
 736                         $code = curl_error( $curlHandle );
 737
 738                         if ( isset( self::$curlMessageMap[$code] ) ) {
 739                                 $this->status->fatal( self::$curlMessageMap[$code] );
 740                         } else {
 741                                 $this->status->fatal( 'http-curl-error', curl_error( $curlHandle ) );
 742                         }
 743                 } else {
 744                         $this->headerList = explode( "\r\n", $this->headerText );
 745                 }
 746
 747                 curl_close( $curlHandle );
 748
 749                 $this->parseHeader();
 750                 $this->setStatus();
 751
 752                 return $this->status;
 753         }
 754
 755         /**
 756          * @return bool
 757          */
 758         public function canFollowRedirects() {
 759                 if ( strval( ini_get( 'open_basedir' ) ) !== '' || wfIniGetBool( 'safe_mode' ) ) {
 760                         wfDebug( "Cannot follow redirects in safe mode\n" );
 761                         return false;
 762                 }
 763
 764                 if ( !defined( 'CURLOPT_REDIR_PROTOCOLS' ) ) {
 765                         wfDebug( "Cannot follow redirects with libcurl < 7.19.4 due to CVE-2009-0037\n" );
 766                         return false;
 767                 }
 768
 769                 return true;
 770         }
 771 }
 772
 773 class PhpHttpRequest extends MWHttpRequest {
 774
 775         /**
 776          * @param $url string
 777          * @return string
 778          */
 779         protected function urlToTcp( $url ) {
 780                 $parsedUrl = parse_url( $url );
 781
 782                 return 'tcp://' . $parsedUrl['host'] . ':' . $parsedUrl['port'];
 783         }
 784
 785         public function execute() {
 786                 parent::execute();
 787
 788                 if ( is_array( $this->postData ) ) {
 789                         $this->postData = wfArrayToCGI( $this->postData );
 790                 }
 791
 792                 if ( $this->parsedUrl['scheme'] != 'http' &&
 793                          $this->parsedUrl['scheme'] != 'https' ) {
 794                         $this->status->fatal( 'http-invalid-scheme', $this->parsedUrl['scheme'] );
 795                 }
 796
 797                 $this->reqHeaders['Accept'] = "*/*";
 798                 if ( $this->method == 'POST' ) {
 799                         // Required for HTTP 1.0 POSTs
 800                         $this->reqHeaders['Content-Length'] = strlen( $this->postData );
 801                         $this->reqHeaders['Content-type'] = "application/x-www-form-urlencoded";
 802                 }
 803
 804                 $options = array();
 805                 if ( $this->proxy && !$this->noProxy ) {
 806                         $options['proxy'] = $this->urlToTCP( $this->proxy );
 807                         $options['request_fulluri'] = true;
 808                 }
 809
 810                 if ( !$this->followRedirects ) {
 811                         $options['max_redirects'] = 0;
 812                 } else {
 813                         $options['max_redirects'] = $this->maxRedirects;
 814                 }
 815
 816                 $options['method'] = $this->method;
 817                 $options['header'] = implode( "\r\n", $this->getHeaderList() );
 818                 // Note that at some future point we may want to support
 819                 // HTTP/1.1, but we'd have to write support for chunking
 820                 // in version of PHP < 5.3.1
 821                 $options['protocol_version'] = "1.0";
 822
 823                 // This is how we tell PHP we want to deal with 404s (for example) ourselves.
 824                 // Only works on 5.2.10+
 825                 $options['ignore_errors'] = true;
 826
 827                 if ( $this->postData ) {
 828                         $options['content'] = $this->postData;
 829                 }
 830
 831                 $options['timeout'] = $this->timeout;
 832
 833                 $context = stream_context_create( array( 'http' => $options ) );
 834
 835                 $this->headerList = array();
 836                 $reqCount = 0;
 837                 $url = $this->url;
 838
 839                 $result = array();
 840
 841                 do {
 842                         $reqCount++;
 843                         wfSuppressWarnings();
 844                         $fh = fopen( $url, "r", false, $context );
 845                         wfRestoreWarnings();
 846
 847                         if ( !$fh ) {
 848                                 break;
 849                         }
 850
 851                         $result = stream_get_meta_data( $fh );
 852                         $this->headerList = $result['wrapper_data'];
 853                         $this->parseHeader();
 854
 855                         if ( !$this->followRedirects ) {
 856                                 break;
 857                         }
 858
 859                         # Handle manual redirection
 860                         if ( !$this->isRedirect() || $reqCount > $this->maxRedirects ) {
 861                                 break;
 862                         }
 863                         # Check security of URL
 864                         $url = $this->getResponseHeader( "Location" );
 865
 866                         if ( !Http::isValidURI( $url ) ) {
 867                                 wfDebug( __METHOD__ . ": insecure redirection\n" );
 868                                 break;
 869                         }
 870                 } while ( true );
 871
 872                 $this->setStatus();
 873
 874                 if ( $fh === false ) {
 875                         $this->status->fatal( 'http-request-error' );
 876                         return $this->status;
 877                 }
 878
 879                 if ( $result['timed_out'] ) {
 880                         $this->status->fatal( 'http-timed-out', $this->url );
 881                         return $this->status;
 882                 }
 883
 884                 // If everything went OK, or we recieved some error code
 885                 // get the response body content.
 886                 if ( $this->status->isOK()
 887                                 || (int)$this->respStatus >= 300) {
 888                         while ( !feof( $fh ) ) {
 889                                 $buf = fread( $fh, 8192 );
 890
 891                                 if ( $buf === false ) {
 892                                         $this->status->fatal( 'http-read-error' );
 893                                         break;
 894                                 }
 895
 896                                 if ( strlen( $buf ) ) {
 897                                         call_user_func( $this->callback, $fh, $buf );
 898                                 }
 899                         }
 900                 }
 901                 fclose( $fh );
 902
 903                 return $this->status;
 904         }
 905 }