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          *                          Otherwise it will use $wgHTTPProxy (if set)
  24          *                          Otherwise it will use the environment variable "http_proxy" (if set)
  25          *    - noProxy             Don't use any proxy at all. Takes precedence over proxy value(s).
  26          *    - sslVerifyHost       (curl only) Verify hostname against certificate
  27          *    - sslVerifyCert       (curl only) Verify SSL certificate
  28          *    - caInfo              (curl only) Provide CA information
  29          *    - maxRedirects        Maximum number of redirects to follow (defaults to 5)
  30          *    - followRedirects     Whether to follow redirects (defaults to false).
  31          *                                  Note: this should only be used when the target URL is trusted,
  32          *                                  to avoid attacks on intranet services accessible by HTTP.
  33          *    - userAgent           A user agent, if you want to override the default
  34          *                          MediaWiki/$wgVersion
  35          * @return Mixed: (bool)false on failure or a string on success
  36          */
  37         public static function request( $method, $url, $options = array() ) {
  38                 wfDebug( "HTTP: $method: $url\n" );
  39                 $options['method'] = strtoupper( $method );
  40
  41                 if ( !isset( $options['timeout'] ) ) {
  42                         $options['timeout'] = 'default';
  43                 }
  44
  45                 $req = MWHttpRequest::factory( $url, $options );
  46                 $status = $req->execute();
  47
  48                 if ( $status->isOK() ) {
  49                         return $req->getContent();
  50                 } else {
  51                         return false;
  52                 }
  53         }
  54
  55         /**
  56          * Simple wrapper for Http::request( 'GET' )
  57          * @see Http::request()
  58          *
  59          * @param $url
  60          * @param $timeout string
  61          * @param $options array
  62          * @return string
  63          */
  64         public static function get( $url, $timeout = 'default', $options = array() ) {
  65                 $options['timeout'] = $timeout;
  66                 return Http::request( 'GET', $url, $options );
  67         }
  68
  69         /**
  70          * Simple wrapper for Http::request( 'POST' )
  71          * @see Http::request()
  72          *
  73          * @param $url
  74          * @param $options array
  75          * @return string
  76          */
  77         public static function post( $url, $options = array() ) {
  78                 return Http::request( 'POST', $url, $options );
  79         }
  80
  81         /**
  82          * Check if the URL can be served by localhost
  83          *
  84          * @param $url String: full url to check
  85          * @return Boolean
  86          */
  87         public static function isLocalURL( $url ) {
  88                 global $wgCommandLineMode, $wgConf;
  89
  90                 if ( $wgCommandLineMode ) {
  91                         return false;
  92                 }
  93
  94                 // Extract host part
  95                 $matches = array();
  96                 if ( preg_match( '!^http://([\w.-]+)[/:].*$!', $url, $matches ) ) {
  97                         $host = $matches[1];
  98                         // Split up dotwise
  99                         $domainParts = explode( '.', $host );
 100                         // Check if this domain or any superdomain is listed in $wgConf as a local virtual host
 101                         $domainParts = array_reverse( $domainParts );
 102
 103                         $domain = '';
 104                         for ( $i = 0; $i < count( $domainParts ); $i++ ) {
 105                                 $domainPart = $domainParts[$i];
 106                                 if ( $i == 0 ) {
 107                                         $domain = $domainPart;
 108                                 } else {
 109                                         $domain = $domainPart . '.' . $domain;
 110                                 }
 111
 112                                 if ( $wgConf->isLocalVHost( $domain ) ) {
 113                                         return true;
 114                                 }
 115                         }
 116                 }
 117
 118                 return false;
 119         }
 120
 121         /**
 122          * A standard user-agent we can use for external requests.
 123          * @return String
 124          */
 125         public static function userAgent() {
 126                 global $wgVersion;
 127                 return "MediaWiki/$wgVersion";
 128         }
 129
 130         /**
 131          * Checks that the given URI is a valid one. Hardcoding the
 132          * protocols, because we only want protocols that both cURL
 133          * and php support.
 134          *
 135          * file:// should not be allowed here for security purpose (r67684)
 136          *
 137          * @fixme this is wildly inaccurate and fails to actually check most stuff
 138          *
 139          * @param $uri Mixed: URI to check for validity
 140          * @return Boolean
 141          */
 142         public static function isValidURI( $uri ) {
 143                 return preg_match(
 144                         '/^https?:\/\/[^\/\s]\S*$/D',
 145                         $uri
 146                 );
 147         }
 148 }
 149
 150 /**
 151  * This wrapper class will call out to curl (if available) or fallback
 152  * to regular PHP if necessary for handling internal HTTP requests.
 153  *
 154  * Renamed from HttpRequest to MWHttpRequest to avoid conflict with
 155  * PHP's HTTP extension.
 156  */
 157 class MWHttpRequest {
 158         const SUPPORTS_FILE_POSTS = false;
 159
 160         protected $content;
 161         protected $timeout = 'default';
 162         protected $headersOnly = null;
 163         protected $postData = null;
 164         protected $proxy = null;
 165         protected $noProxy = false;
 166         protected $sslVerifyHost = true;
 167         protected $sslVerifyCert = true;
 168         protected $caInfo = null;
 169         protected $method = "GET";
 170         protected $reqHeaders = array();
 171         protected $url;
 172         protected $parsedUrl;
 173         protected $callback;
 174         protected $maxRedirects = 5;
 175         protected $followRedirects = false;
 176
 177         /**
 178          * @var  CookieJar
 179          */
 180         protected $cookieJar;
 181
 182         protected $headerList = array();
 183         protected $respVersion = "0.9";
 184         protected $respStatus = "200 Ok";
 185         protected $respHeaders = array();
 186
 187         public $status;
 188
 189         /**
 190          * @param $url String: url to use. If protocol-relative, will be expanded to an http:// URL
 191          * @param $options Array: (optional) extra params to pass (see Http::request())
 192          */
 193         function __construct( $url, $options = array() ) {
 194                 global $wgHTTPTimeout;
 195
 196                 $this->url = wfExpandUrl( $url, PROTO_HTTP );
 197                 $this->parsedUrl = wfParseUrl( $this->url );
 198
 199                 if ( !$this->parsedUrl || !Http::isValidURI( $this->url ) ) {
 200                         $this->status = Status::newFatal( 'http-invalid-url' );
 201                 } else {
 202                         $this->status = Status::newGood( 100 ); // continue
 203                 }
 204
 205                 if ( isset( $options['timeout'] ) && $options['timeout'] != 'default' ) {
 206                         $this->timeout = $options['timeout'];
 207                 } else {
 208                         $this->timeout = $wgHTTPTimeout;
 209                 }
 210                 if( isset( $options['userAgent'] ) ) {
 211                         $this->setUserAgent( $options['userAgent'] );
 212                 }
 213
 214                 $members = array( "postData", "proxy", "noProxy", "sslVerifyHost", "caInfo",
 215                                   "method", "followRedirects", "maxRedirects", "sslVerifyCert", "callback" );
 216
 217                 foreach ( $members as $o ) {
 218                         if ( isset( $options[$o] ) ) {
 219                                 // ensure that MWHttpRequest::method is always
 220                                 // uppercased. Bug 36137
 221                                 if ( $o == 'method' ) {
 222                                         $options[$o] = strtoupper( $options[$o] );
 223                                 }
 224                                 $this->$o = $options[$o];
 225                         }
 226                 }
 227
 228                 if ( $this->noProxy ) {
 229                         $this->proxy = ''; // noProxy takes precedence
 230                 }
 231         }
 232
 233         /**
 234          * Simple function to test if we can make any sort of requests at all, using
 235          * cURL or fopen()
 236          * @return bool
 237          */
 238         public static function canMakeRequests() {
 239                 return function_exists( 'curl_init' ) || wfIniGetBool( 'allow_url_fopen' );
 240         }
 241
 242         /**
 243          * Generate a new request object
 244          * @param $url String: url to use
 245          * @param $options Array: (optional) extra params to pass (see Http::request())
 246          * @return CurlHttpRequest|PhpHttpRequest
 247          * @see MWHttpRequest::__construct
 248          */
 249         public static function factory( $url, $options = null ) {
 250                 if ( !Http::$httpEngine ) {
 251                         Http::$httpEngine = function_exists( 'curl_init' ) ? 'curl' : 'php';
 252                 } elseif ( Http::$httpEngine == 'curl' && !function_exists( 'curl_init' ) ) {
 253                         throw new MWException( __METHOD__ . ': curl (http://php.net/curl) is not installed, but' .
 254                                                                    ' Http::$httpEngine is set to "curl"' );
 255                 }
 256
 257                 switch( Http::$httpEngine ) {
 258                         case 'curl':
 259                                 return new CurlHttpRequest( $url, $options );
 260                         case 'php':
 261                                 if ( !wfIniGetBool( 'allow_url_fopen' ) ) {
 262                                         throw new MWException( __METHOD__ . ': allow_url_fopen needs to be enabled for pure PHP' .
 263                                                 ' http requests to work. If possible, curl should be used instead. See http://php.net/curl.' );
 264                                 }
 265                                 return new PhpHttpRequest( $url, $options );
 266                         default:
 267                                 throw new MWException( __METHOD__ . ': The setting of Http::$httpEngine is not valid.' );
 268                 }
 269         }
 270
 271         /**
 272          * Get the body, or content, of the response to the request
 273          *
 274          * @return String
 275          */
 276         public function getContent() {
 277                 return $this->content;
 278         }
 279
 280         /**
 281          * Set the parameters of the request
 282
 283          * @param $args Array
 284          * @todo overload the args param
 285          */
 286         public function setData( $args ) {
 287                 $this->postData = $args;
 288         }
 289
 290         /**
 291          * Take care of setting up the proxy (do nothing if "noProxy" is set)
 292          *
 293          * @return void
 294          */
 295         public function proxySetup() {
 296                 global $wgHTTPProxy;
 297
 298                 if ( $this->proxy || !$this->noProxy ) {
 299                         return;
 300                 }
 301
 302                 if ( Http::isLocalURL( $this->url ) || $this->noProxy ) {
 303                         $this->proxy = '';
 304                 } elseif ( $wgHTTPProxy ) {
 305                         $this->proxy = $wgHTTPProxy ;
 306                 } elseif ( getenv( "http_proxy" ) ) {
 307                         $this->proxy = getenv( "http_proxy" );
 308                 }
 309         }
 310
 311         /**
 312          * Set the refererer header
 313          */
 314         public function setReferer( $url ) {
 315                 $this->setHeader( 'Referer', $url );
 316         }
 317
 318         /**
 319          * Set the user agent
 320          * @param $UA string
 321          */
 322         public function setUserAgent( $UA ) {
 323                 $this->setHeader( 'User-Agent', $UA );
 324         }
 325
 326         /**
 327          * Set an arbitrary header
 328          * @param $name
 329          * @param $value
 330          */
 331         public function setHeader( $name, $value ) {
 332                 // I feel like I should normalize the case here...
 333                 $this->reqHeaders[$name] = $value;
 334         }
 335
 336         /**
 337          * Get an array of the headers
 338          * @return array
 339          */
 340         public function getHeaderList() {
 341                 $list = array();
 342
 343                 if ( $this->cookieJar ) {
 344                         $this->reqHeaders['Cookie'] =
 345                                 $this->cookieJar->serializeToHttpRequest(
 346                                         $this->parsedUrl['path'],
 347                                         $this->parsedUrl['host']
 348                                 );
 349                 }
 350
 351                 foreach ( $this->reqHeaders as $name => $value ) {
 352                         $list[] = "$name: $value";
 353                 }
 354
 355                 return $list;
 356         }
 357
 358         /**
 359          * Set a read callback to accept data read from the HTTP request.
 360          * By default, data is appended to an internal buffer which can be
 361          * retrieved through $req->getContent().
 362          *
 363          * To handle data as it comes in -- especially for large files that
 364          * would not fit in memory -- you can instead set your own callback,
 365          * in the form function($resource, $buffer) where the first parameter
 366          * is the low-level resource being read (implementation specific),
 367          * and the second parameter is the data buffer.
 368          *
 369          * You MUST return the number of bytes handled in the buffer; if fewer
 370          * bytes are reported handled than were passed to you, the HTTP fetch
 371          * will be aborted.
 372          *
 373          * @param $callback Callback
 374          */
 375         public function setCallback( $callback ) {
 376                 if ( !is_callable( $callback ) ) {
 377                         throw new MWException( 'Invalid MwHttpRequest callback' );
 378                 }
 379                 $this->callback = $callback;
 380         }
 381
 382         /**
 383          * A generic callback to read the body of the response from a remote
 384          * server.
 385          *
 386          * @param $fh handle
 387          * @param $content String
 388          * @return int
 389          */
 390         public function read( $fh, $content ) {
 391                 $this->content .= $content;
 392                 return strlen( $content );
 393         }
 394
 395         /**
 396          * Take care of whatever is necessary to perform the URI request.
 397          *
 398          * @return Status
 399          */
 400         public function execute() {
 401                 global $wgTitle;
 402
 403                 $this->content = "";
 404
 405                 if ( strtoupper( $this->method ) == "HEAD" ) {
 406                         $this->headersOnly = true;
 407                 }
 408
 409                 if ( is_object( $wgTitle ) && !isset( $this->reqHeaders['Referer'] ) ) {
 410                         $this->setReferer( wfExpandUrl( $wgTitle->getFullURL(), PROTO_CURRENT ) );
 411                 }
 412
 413                 $this->proxySetup(); // set up any proxy as needed
 414
 415                 if ( !$this->callback ) {
 416                         $this->setCallback( array( $this, 'read' ) );
 417                 }
 418
 419                 if ( !isset( $this->reqHeaders['User-Agent'] ) ) {
 420                         $this->setUserAgent( Http::userAgent() );
 421                 }
 422         }
 423
 424         /**
 425          * Parses the headers, including the HTTP status code and any
 426          * Set-Cookie headers.  This function expectes the headers to be
 427          * found in an array in the member variable headerList.
 428          */
 429         protected function parseHeader() {
 430                 $lastname = "";
 431
 432                 foreach ( $this->headerList as $header ) {
 433                         if ( preg_match( "#^HTTP/([0-9.]+) (.*)#", $header, $match ) ) {
 434                                 $this->respVersion = $match[1];
 435                                 $this->respStatus = $match[2];
 436                         } elseif ( preg_match( "#^[ \t]#", $header ) ) {
 437                                 $last = count( $this->respHeaders[$lastname] ) - 1;
 438                                 $this->respHeaders[$lastname][$last] .= "\r\n$header";
 439                         } elseif ( preg_match( "#^([^:]*):[\t ]*(.*)#", $header, $match ) ) {
 440                                 $this->respHeaders[strtolower( $match[1] )][] = $match[2];
 441                                 $lastname = strtolower( $match[1] );
 442                         }
 443                 }
 444
 445                 $this->parseCookies();
 446         }
 447
 448         /**
 449          * Sets HTTPRequest status member to a fatal value with the error
 450          * message if the returned integer value of the status code was
 451          * not successful (< 300) or a redirect (>=300 and < 400).  (see
 452          * RFC2616, section 10,
 453          * http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html for a
 454          * list of status codes.)
 455          */
 456         protected function setStatus() {
 457                 if ( !$this->respHeaders ) {
 458                         $this->parseHeader();
 459                 }
 460
 461                 if ( (int)$this->respStatus > 399 ) {
 462                         list( $code, $message ) = explode( " ", $this->respStatus, 2 );
 463                         $this->status->fatal( "http-bad-status", $code, $message );
 464                 }
 465         }
 466
 467         /**
 468          * Get the integer value of the HTTP status code (e.g. 200 for "200 Ok")
 469          * (see RFC2616, section 10, http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
 470          * for a list of status codes.)
 471          *
 472          * @return Integer
 473          */
 474         public function getStatus() {
 475                 if ( !$this->respHeaders ) {
 476                         $this->parseHeader();
 477                 }
 478
 479                 return (int)$this->respStatus;
 480         }
 481
 482
 483         /**
 484          * Returns true if the last status code was a redirect.
 485          *
 486          * @return Boolean
 487          */
 488         public function isRedirect() {
 489                 if ( !$this->respHeaders ) {
 490                         $this->parseHeader();
 491                 }
 492
 493                 $status = (int)$this->respStatus;
 494
 495                 if ( $status >= 300 && $status <= 303 ) {
 496                         return true;
 497                 }
 498
 499                 return false;
 500         }
 501
 502         /**
 503          * Returns an associative array of response headers after the
 504          * request has been executed.  Because some headers
 505          * (e.g. Set-Cookie) can appear more than once the, each value of
 506          * the associative array is an array of the values given.
 507          *
 508          * @return Array
 509          */
 510         public function getResponseHeaders() {
 511                 if ( !$this->respHeaders ) {
 512                         $this->parseHeader();
 513                 }
 514
 515                 return $this->respHeaders;
 516         }
 517
 518         /**
 519          * Returns the value of the given response header.
 520          *
 521          * @param $header String
 522          * @return String
 523          */
 524         public function getResponseHeader( $header ) {
 525                 if ( !$this->respHeaders ) {
 526                         $this->parseHeader();
 527                 }
 528
 529                 if ( isset( $this->respHeaders[strtolower ( $header ) ] ) ) {
 530                         $v = $this->respHeaders[strtolower ( $header ) ];
 531                         return $v[count( $v ) - 1];
 532                 }
 533
 534                 return null;
 535         }
 536
 537         /**
 538          * Tells the MWHttpRequest object to use this pre-loaded CookieJar.
 539          *
 540          * @param $jar CookieJar
 541          */
 542         public function setCookieJar( $jar ) {
 543                 $this->cookieJar = $jar;
 544         }
 545
 546         /**
 547          * Returns the cookie jar in use.
 548          *
 549          * @return CookieJar
 550          */
 551         public function getCookieJar() {
 552                 if ( !$this->respHeaders ) {
 553                         $this->parseHeader();
 554                 }
 555
 556                 return $this->cookieJar;
 557         }
 558
 559         /**
 560          * Sets a cookie.  Used before a request to set up any individual
 561          * cookies.      Used internally after a request to parse the
 562          * Set-Cookie headers.
 563          * @see Cookie::set
 564          * @param $name
 565          * @param $value null
 566          * @param $attr null
 567          */
 568         public function setCookie( $name, $value = null, $attr = null ) {
 569                 if ( !$this->cookieJar ) {
 570                         $this->cookieJar = new CookieJar;
 571                 }
 572
 573                 $this->cookieJar->setCookie( $name, $value, $attr );
 574         }
 575
 576         /**
 577          * Parse the cookies in the response headers and store them in the cookie jar.
 578          */
 579         protected function parseCookies() {
 580                 if ( !$this->cookieJar ) {
 581                         $this->cookieJar = new CookieJar;
 582                 }
 583
 584                 if ( isset( $this->respHeaders['set-cookie'] ) ) {
 585                         $url = parse_url( $this->getFinalUrl() );
 586                         foreach ( $this->respHeaders['set-cookie'] as $cookie ) {
 587                                 $this->cookieJar->parseCookieResponseHeader( $cookie, $url['host'] );
 588                         }
 589                 }
 590         }
 591
 592         /**
 593          * Returns the final URL after all redirections.
 594          *
 595          * Relative values of the "Location" header are incorrect as stated in RFC, however they do happen and modern browsers support them.
 596          * This function loops backwards through all locations in order to build the proper absolute URI - Marooned at wikia-inc.com
 597          *
 598          * Note that the multiple Location: headers are an artifact of CURL -- they
 599          * shouldn't actually get returned this way. Rewrite this when bug 29232 is
 600          * taken care of (high-level redirect handling rewrite).
 601          *
 602          * @return string
 603          */
 604         public function getFinalUrl() {
 605                 $headers = $this->getResponseHeaders();
 606
 607                 //return full url (fix for incorrect but handled relative location)
 608                 if ( isset( $headers[ 'location' ] ) ) {
 609                         $locations = $headers[ 'location' ];
 610                         $domain = '';
 611                         $foundRelativeURI = false;
 612                         $countLocations = count($locations);
 613
 614                         for ( $i = $countLocations - 1; $i >= 0; $i-- ) {
 615                                 $url = parse_url( $locations[ $i ] );
 616
 617                                 if ( isset($url[ 'host' ]) ) {
 618                                         $domain = $url[ 'scheme' ] . '://' . $url[ 'host' ];
 619                                         break;  //found correct URI (with host)
 620                                 } else {
 621                                         $foundRelativeURI = true;
 622                                 }
 623                         }
 624
 625                         if ( $foundRelativeURI ) {
 626                                 if ( $domain ) {
 627                                         return $domain . $locations[ $countLocations - 1 ];
 628                                 } else {
 629                                         $url = parse_url( $this->url );
 630                                         if ( isset($url[ 'host' ]) ) {
 631                                                 return $url[ 'scheme' ] . '://' . $url[ 'host' ] . $locations[ $countLocations - 1 ];
 632                                         }
 633                                 }
 634                         } else {
 635                                 return $locations[ $countLocations - 1 ];
 636                         }
 637                 }
 638
 639                 return $this->url;
 640         }
 641
 642         /**
 643          * Returns true if the backend can follow redirects. Overridden by the
 644          * child classes.
 645          * @return bool
 646          */
 647         public function canFollowRedirects() {
 648                 return true;
 649         }
 650 }
 651
 652 /**
 653  * MWHttpRequest implemented using internal curl compiled into PHP
 654  */
 655 class CurlHttpRequest extends MWHttpRequest {
 656         const SUPPORTS_FILE_POSTS = true;
 657
 658         static $curlMessageMap = array(
 659                 6 => 'http-host-unreachable',
 660                 28 => 'http-timed-out'
 661         );
 662
 663         protected $curlOptions = array();
 664         protected $headerText = "";
 665
 666         /**
 667          * @param $fh
 668          * @param $content
 669          * @return int
 670          */
 671         protected function readHeader( $fh, $content ) {
 672                 $this->headerText .= $content;
 673                 return strlen( $content );
 674         }
 675
 676         public function execute() {
 677                 parent::execute();
 678
 679                 if ( !$this->status->isOK() ) {
 680                         return $this->status;
 681                 }
 682
 683                 $this->curlOptions[CURLOPT_PROXY] = $this->proxy;
 684                 $this->curlOptions[CURLOPT_TIMEOUT] = $this->timeout;
 685                 $this->curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_0;
 686                 $this->curlOptions[CURLOPT_WRITEFUNCTION] = $this->callback;
 687                 $this->curlOptions[CURLOPT_HEADERFUNCTION] = array( $this, "readHeader" );
 688                 $this->curlOptions[CURLOPT_MAXREDIRS] = $this->maxRedirects;
 689                 $this->curlOptions[CURLOPT_ENCODING] = ""; # Enable compression
 690
 691                 /* not sure these two are actually necessary */
 692                 if ( isset( $this->reqHeaders['Referer'] ) ) {
 693                         $this->curlOptions[CURLOPT_REFERER] = $this->reqHeaders['Referer'];
 694                 }
 695                 $this->curlOptions[CURLOPT_USERAGENT] = $this->reqHeaders['User-Agent'];
 696
 697                 if ( isset( $this->sslVerifyHost ) ) {
 698                         $this->curlOptions[CURLOPT_SSL_VERIFYHOST] = $this->sslVerifyHost;
 699                 }
 700
 701                 if ( isset( $this->sslVerifyCert ) ) {
 702                         $this->curlOptions[CURLOPT_SSL_VERIFYPEER] = $this->sslVerifyCert;
 703                 }
 704
 705                 if ( $this->caInfo ) {
 706                         $this->curlOptions[CURLOPT_CAINFO] = $this->caInfo;
 707                 }
 708
 709                 if ( $this->headersOnly ) {
 710                         $this->curlOptions[CURLOPT_NOBODY] = true;
 711                         $this->curlOptions[CURLOPT_HEADER] = true;
 712                 } elseif ( $this->method == 'POST' ) {
 713                         $this->curlOptions[CURLOPT_POST] = true;
 714                         $this->curlOptions[CURLOPT_POSTFIELDS] = $this->postData;
 715                         // Suppress 'Expect: 100-continue' header, as some servers
 716                         // will reject it with a 417 and Curl won't auto retry
 717                         // with HTTP 1.0 fallback
 718                         $this->reqHeaders['Expect'] = '';
 719                 } else {
 720                         $this->curlOptions[CURLOPT_CUSTOMREQUEST] = $this->method;
 721                 }
 722
 723                 $this->curlOptions[CURLOPT_HTTPHEADER] = $this->getHeaderList();
 724
 725                 $curlHandle = curl_init( $this->url );
 726
 727                 if ( !curl_setopt_array( $curlHandle, $this->curlOptions ) ) {
 728                         throw new MWException( "Error setting curl options." );
 729                 }
 730
 731                 if ( $this->followRedirects && $this->canFollowRedirects() ) {
 732                         wfSuppressWarnings();
 733                         if ( ! curl_setopt( $curlHandle, CURLOPT_FOLLOWLOCATION, true ) ) {
 734                                 wfDebug( __METHOD__ . ": Couldn't set CURLOPT_FOLLOWLOCATION. " .
 735                                         "Probably safe_mode or open_basedir is set.\n" );
 736                                 // Continue the processing. If it were in curl_setopt_array,
 737                                 // processing would have halted on its entry
 738                         }
 739                         wfRestoreWarnings();
 740                 }
 741
 742                 if ( false === curl_exec( $curlHandle ) ) {
 743                         $code = curl_error( $curlHandle );
 744
 745                         if ( isset( self::$curlMessageMap[$code] ) ) {
 746                                 $this->status->fatal( self::$curlMessageMap[$code] );
 747                         } else {
 748                                 $this->status->fatal( 'http-curl-error', curl_error( $curlHandle ) );
 749                         }
 750                 } else {
 751                         $this->headerList = explode( "\r\n", $this->headerText );
 752                 }
 753
 754                 curl_close( $curlHandle );
 755
 756                 $this->parseHeader();
 757                 $this->setStatus();
 758
 759                 if ( isset( $this->respHeaders['content-length'] ) ) {
 760                         if ( strlen( $this->content ) < $this->getResponseHeader( 'content-length' ) ) {
 761                                 $this->status->fatal( 'http-truncated-body' );
 762                         }
 763                 }
 764
 765                 return $this->status;
 766         }
 767
 768         /**
 769          * @return bool
 770          */
 771         public function canFollowRedirects() {
 772                 if ( strval( ini_get( 'open_basedir' ) ) !== '' || wfIniGetBool( 'safe_mode' ) ) {
 773                         wfDebug( "Cannot follow redirects in safe mode\n" );
 774                         return false;
 775                 }
 776
 777                 if ( !defined( 'CURLOPT_REDIR_PROTOCOLS' ) ) {
 778                         wfDebug( "Cannot follow redirects with libcurl < 7.19.4 due to CVE-2009-0037\n" );
 779                         return false;
 780                 }
 781
 782                 return true;
 783         }
 784 }
 785
 786 class PhpHttpRequest extends MWHttpRequest {
 787
 788         /**
 789          * @param $url string
 790          * @return string
 791          */
 792         protected function urlToTcp( $url ) {
 793                 $parsedUrl = parse_url( $url );
 794
 795                 return 'tcp://' . $parsedUrl['host'] . ':' . $parsedUrl['port'];
 796         }
 797
 798         public function execute() {
 799                 parent::execute();
 800
 801                 if ( is_array( $this->postData ) ) {
 802                         $this->postData = wfArrayToCGI( $this->postData );
 803                 }
 804
 805                 if ( $this->parsedUrl['scheme'] != 'http' &&
 806                          $this->parsedUrl['scheme'] != 'https' ) {
 807                         $this->status->fatal( 'http-invalid-scheme', $this->parsedUrl['scheme'] );
 808                 }
 809
 810                 $this->reqHeaders['Accept'] = "*/*";
 811                 if ( $this->method == 'POST' ) {
 812                         // Required for HTTP 1.0 POSTs
 813                         $this->reqHeaders['Content-Length'] = strlen( $this->postData );
 814                         if( !isset( $this->reqHeaders['Content-Type'] ) ) {
 815                                 $this->reqHeaders['Content-Type'] = "application/x-www-form-urlencoded";
 816                         }
 817                 }
 818
 819                 $options = array();
 820                 if ( $this->proxy ) {
 821                         $options['proxy'] = $this->urlToTCP( $this->proxy );
 822                         $options['request_fulluri'] = true;
 823                 }
 824
 825                 if ( !$this->followRedirects ) {
 826                         $options['max_redirects'] = 0;
 827                 } else {
 828                         $options['max_redirects'] = $this->maxRedirects;
 829                 }
 830
 831                 $options['method'] = $this->method;
 832                 $options['header'] = implode( "\r\n", $this->getHeaderList() );
 833                 // Note that at some future point we may want to support
 834                 // HTTP/1.1, but we'd have to write support for chunking
 835                 // in version of PHP < 5.3.1
 836                 $options['protocol_version'] = "1.0";
 837
 838                 // This is how we tell PHP we want to deal with 404s (for example) ourselves.
 839                 // Only works on 5.2.10+
 840                 $options['ignore_errors'] = true;
 841
 842                 if ( $this->postData ) {
 843                         $options['content'] = $this->postData;
 844                 }
 845
 846                 $options['timeout'] = $this->timeout;
 847
 848                 $context = stream_context_create( array( 'http' => $options ) );
 849
 850                 $this->headerList = array();
 851                 $reqCount = 0;
 852                 $url = $this->url;
 853
 854                 $result = array();
 855
 856                 do {
 857                         $reqCount++;
 858                         wfSuppressWarnings();
 859                         $fh = fopen( $url, "r", false, $context );
 860                         wfRestoreWarnings();
 861
 862                         if ( !$fh ) {
 863                                 break;
 864                         }
 865
 866                         $result = stream_get_meta_data( $fh );
 867                         $this->headerList = $result['wrapper_data'];
 868                         $this->parseHeader();
 869
 870                         if ( !$this->followRedirects ) {
 871                                 break;
 872                         }
 873
 874                         # Handle manual redirection
 875                         if ( !$this->isRedirect() || $reqCount > $this->maxRedirects ) {
 876                                 break;
 877                         }
 878                         # Check security of URL
 879                         $url = $this->getResponseHeader( "Location" );
 880
 881                         if ( !Http::isValidURI( $url ) ) {
 882                                 wfDebug( __METHOD__ . ": insecure redirection\n" );
 883                                 break;
 884                         }
 885                 } while ( true );
 886
 887                 $this->setStatus();
 888
 889                 if ( $fh === false ) {
 890                         $this->status->fatal( 'http-request-error' );
 891                         return $this->status;
 892                 }
 893
 894                 if ( $result['timed_out'] ) {
 895                         $this->status->fatal( 'http-timed-out', $this->url );
 896                         return $this->status;
 897                 }
 898
 899                 // If everything went OK, or we received some error code
 900                 // get the response body content.
 901                 if ( $this->status->isOK()
 902                                 || (int)$this->respStatus >= 300) {
 903                         while ( !feof( $fh ) ) {
 904                                 $buf = fread( $fh, 8192 );
 905
 906                                 if ( $buf === false ) {
 907                                         $this->status->fatal( 'http-read-error' );
 908                                         break;
 909                                 }
 910
 911                                 if ( strlen( $buf ) ) {
 912                                         call_user_func( $this->callback, $fh, $buf );
 913                                 }
 914                         }
 915                 }
 916                 fclose( $fh );
 917
 918                 return $this->status;
 919         }
 920 }