includes/HttpFunctions.php

   1 <?php
   2 /**
   3  * Various HTTP related functions.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup HTTP
  22  */
  23
  24 /**
  25  * @defgroup HTTP HTTP
  26  */
  27
  28 /**
  29  * Various HTTP related functions
  30  * @ingroup HTTP
  31  */
  32 class Http {
  33         static $httpEngine = false;
  34
  35         /**
  36          * Perform an HTTP request
  37          *
  38          * @param string $method HTTP method. Usually GET/POST
  39          * @param string $url full URL to act on. If protocol-relative, will be expanded to an http:// URL
  40          * @param array $options options to pass to MWHttpRequest object.
  41          *      Possible keys for the array:
  42          *    - timeout             Timeout length in seconds
  43          *    - postData            An array of key-value pairs or a url-encoded form data
  44          *    - proxy               The proxy to use.
  45          *                          Otherwise it will use $wgHTTPProxy (if set)
  46          *                          Otherwise it will use the environment variable "http_proxy" (if set)
  47          *    - noProxy             Don't use any proxy at all. Takes precedence over proxy value(s).
  48          *    - sslVerifyHost       (curl only) Verify hostname against certificate
  49          *    - sslVerifyCert       (curl only) Verify SSL certificate
  50          *    - caInfo              (curl only) Provide CA information
  51          *    - maxRedirects        Maximum number of redirects to follow (defaults to 5)
  52          *    - followRedirects     Whether to follow redirects (defaults to false).
  53          *                                  Note: this should only be used when the target URL is trusted,
  54          *                                  to avoid attacks on intranet services accessible by HTTP.
  55          *    - userAgent           A user agent, if you want to override the default
  56          *                          MediaWiki/$wgVersion
  57          * @return Mixed: (bool)false on failure or a string on success
  58          */
  59         public static function request( $method, $url, $options = array() ) {
  60                 wfDebug( "HTTP: $method: $url\n" );
  61                 wfProfileIn( __METHOD__ . "-$method" );
  62
  63                 $options['method'] = strtoupper( $method );
  64
  65                 if ( !isset( $options['timeout'] ) ) {
  66                         $options['timeout'] = 'default';
  67                 }
  68
  69                 $req = MWHttpRequest::factory( $url, $options );
  70                 $status = $req->execute();
  71
  72                 if ( $status->isOK() ) {
  73                         $content = $req->getContent();
  74                         wfProfileOut( __METHOD__ . "-$method" );
  75                         return $content;
  76                 } else {
  77                         wfProfileOut( __METHOD__ . "-$method" );
  78                         return false;
  79                 }
  80         }
  81
  82         /**
  83          * Simple wrapper for Http::request( 'GET' )
  84          * @see Http::request()
  85          *
  86          * @param $url
  87          * @param $timeout string
  88          * @param $options array
  89          * @return string
  90          */
  91         public static function get( $url, $timeout = 'default', $options = array() ) {
  92                 $options['timeout'] = $timeout;
  93                 return Http::request( 'GET', $url, $options );
  94         }
  95
  96         /**
  97          * Simple wrapper for Http::request( 'POST' )
  98          * @see Http::request()
  99          *
 100          * @param $url
 101          * @param $options array
 102          * @return string
 103          */
 104         public static function post( $url, $options = array() ) {
 105                 return Http::request( 'POST', $url, $options );
 106         }
 107
 108         /**
 109          * Check if the URL can be served by localhost
 110          *
 111          * @param string $url full url to check
 112          * @return Boolean
 113          */
 114         public static function isLocalURL( $url ) {
 115                 global $wgCommandLineMode, $wgConf;
 116
 117                 if ( $wgCommandLineMode ) {
 118                         return false;
 119                 }
 120
 121                 // Extract host part
 122                 $matches = array();
 123                 if ( preg_match( '!^http://([\w.-]+)[/:].*$!', $url, $matches ) ) {
 124                         $host = $matches[1];
 125                         // Split up dotwise
 126                         $domainParts = explode( '.', $host );
 127                         // Check if this domain or any superdomain is listed in $wgConf as a local virtual host
 128                         $domainParts = array_reverse( $domainParts );
 129
 130                         $domain = '';
 131                         for ( $i = 0; $i < count( $domainParts ); $i++ ) {
 132                                 $domainPart = $domainParts[$i];
 133                                 if ( $i == 0 ) {
 134                                         $domain = $domainPart;
 135                                 } else {
 136                                         $domain = $domainPart . '.' . $domain;
 137                                 }
 138
 139                                 if ( $wgConf->isLocalVHost( $domain ) ) {
 140                                         return true;
 141                                 }
 142                         }
 143                 }
 144
 145                 return false;
 146         }
 147
 148         /**
 149          * A standard user-agent we can use for external requests.
 150          * @return String
 151          */
 152         public static function userAgent() {
 153                 global $wgVersion;
 154                 return "MediaWiki/$wgVersion";
 155         }
 156
 157         /**
 158          * Checks that the given URI is a valid one. Hardcoding the
 159          * protocols, because we only want protocols that both cURL
 160          * and php support.
 161          *
 162          * file:// should not be allowed here for security purpose (r67684)
 163          *
 164          * @todo FIXME this is wildly inaccurate and fails to actually check most stuff
 165          *
 166          * @param $uri Mixed: URI to check for validity
 167          * @return Boolean
 168          */
 169         public static function isValidURI( $uri ) {
 170                 return preg_match(
 171                         '/^https?:\/\/[^\/\s]\S*$/D',
 172                         $uri
 173                 );
 174         }
 175 }
 176
 177 /**
 178  * This wrapper class will call out to curl (if available) or fallback
 179  * to regular PHP if necessary for handling internal HTTP requests.
 180  *
 181  * Renamed from HttpRequest to MWHttpRequest to avoid conflict with
 182  * PHP's HTTP extension.
 183  */
 184 class MWHttpRequest {
 185         const SUPPORTS_FILE_POSTS = false;
 186
 187         protected $content;
 188         protected $timeout = 'default';
 189         protected $headersOnly = null;
 190         protected $postData = null;
 191         protected $proxy = null;
 192         protected $noProxy = false;
 193         protected $sslVerifyHost = true;
 194         protected $sslVerifyCert = true;
 195         protected $caInfo = null;
 196         protected $method = "GET";
 197         protected $reqHeaders = array();
 198         protected $url;
 199         protected $parsedUrl;
 200         protected $callback;
 201         protected $maxRedirects = 5;
 202         protected $followRedirects = false;
 203
 204         /**
 205          * @var  CookieJar
 206          */
 207         protected $cookieJar;
 208
 209         protected $headerList = array();
 210         protected $respVersion = "0.9";
 211         protected $respStatus = "200 Ok";
 212         protected $respHeaders = array();
 213
 214         public $status;
 215
 216         /**
 217          * @param string $url url to use. If protocol-relative, will be expanded to an http:// URL
 218          * @param array $options (optional) extra params to pass (see Http::request())
 219          */
 220         protected function __construct( $url, $options = array() ) {
 221                 global $wgHTTPTimeout;
 222
 223                 $this->url = wfExpandUrl( $url, PROTO_HTTP );
 224                 $this->parsedUrl = wfParseUrl( $this->url );
 225
 226                 if ( !$this->parsedUrl || !Http::isValidURI( $this->url ) ) {
 227                         $this->status = Status::newFatal( 'http-invalid-url' );
 228                 } else {
 229                         $this->status = Status::newGood( 100 ); // continue
 230                 }
 231
 232                 if ( isset( $options['timeout'] ) && $options['timeout'] != 'default' ) {
 233                         $this->timeout = $options['timeout'];
 234                 } else {
 235                         $this->timeout = $wgHTTPTimeout;
 236                 }
 237                 if( isset( $options['userAgent'] ) ) {
 238                         $this->setUserAgent( $options['userAgent'] );
 239                 }
 240
 241                 $members = array( "postData", "proxy", "noProxy", "sslVerifyHost", "caInfo",
 242                                 "method", "followRedirects", "maxRedirects", "sslVerifyCert", "callback" );
 243
 244                 foreach ( $members as $o ) {
 245                         if ( isset( $options[$o] ) ) {
 246                                 // ensure that MWHttpRequest::method is always
 247                                 // uppercased. Bug 36137
 248                                 if ( $o == 'method' ) {
 249                                         $options[$o] = strtoupper( $options[$o] );
 250                                 }
 251                                 $this->$o = $options[$o];
 252                         }
 253                 }
 254
 255                 if ( $this->noProxy ) {
 256                         $this->proxy = ''; // noProxy takes precedence
 257                 }
 258         }
 259
 260         /**
 261          * Simple function to test if we can make any sort of requests at all, using
 262          * cURL or fopen()
 263          * @return bool
 264          */
 265         public static function canMakeRequests() {
 266                 return function_exists( 'curl_init' ) || wfIniGetBool( 'allow_url_fopen' );
 267         }
 268
 269         /**
 270          * Generate a new request object
 271          * @param string $url url to use
 272          * @param array $options (optional) extra params to pass (see Http::request())
 273          * @throws MWException
 274          * @return CurlHttpRequest|PhpHttpRequest
 275          * @see MWHttpRequest::__construct
 276          */
 277         public static function factory( $url, $options = null ) {
 278                 if ( !Http::$httpEngine ) {
 279                         Http::$httpEngine = function_exists( 'curl_init' ) ? 'curl' : 'php';
 280                 } elseif ( Http::$httpEngine == 'curl' && !function_exists( 'curl_init' ) ) {
 281                         throw new MWException( __METHOD__ . ': curl (http://php.net/curl) is not installed, but' .
 282                                 ' Http::$httpEngine is set to "curl"' );
 283                 }
 284
 285                 switch( Http::$httpEngine ) {
 286                         case 'curl':
 287                                 return new CurlHttpRequest( $url, $options );
 288                         case 'php':
 289                                 if ( !wfIniGetBool( 'allow_url_fopen' ) ) {
 290                                         throw new MWException( __METHOD__ . ': allow_url_fopen needs to be enabled for pure PHP' .
 291                                                 ' http requests to work. If possible, curl should be used instead. See http://php.net/curl.' );
 292                                 }
 293                                 return new PhpHttpRequest( $url, $options );
 294                         default:
 295                                 throw new MWException( __METHOD__ . ': The setting of Http::$httpEngine is not valid.' );
 296                 }
 297         }
 298
 299         /**
 300          * Get the body, or content, of the response to the request
 301          *
 302          * @return String
 303          */
 304         public function getContent() {
 305                 return $this->content;
 306         }
 307
 308         /**
 309          * Set the parameters of the request
 310
 311          * @param $args Array
 312          * @todo overload the args param
 313          */
 314         public function setData( $args ) {
 315                 $this->postData = $args;
 316         }
 317
 318         /**
 319          * Take care of setting up the proxy (do nothing if "noProxy" is set)
 320          *
 321          * @return void
 322          */
 323         public function proxySetup() {
 324                 global $wgHTTPProxy;
 325
 326                 // If there is an explicit proxy set and proxies are not disabled, then use it
 327                 if ( $this->proxy && !$this->noProxy ) {
 328                         return;
 329                 }
 330
 331                 // Otherwise, fallback to $wgHTTPProxy/http_proxy (when set) if this is not a machine
 332                 // local URL and proxies are not disabled
 333                 if ( Http::isLocalURL( $this->url ) || $this->noProxy ) {
 334                         $this->proxy = '';
 335                 } elseif ( $wgHTTPProxy ) {
 336                         $this->proxy = $wgHTTPProxy;
 337                 } elseif ( getenv( "http_proxy" ) ) {
 338                         $this->proxy = getenv( "http_proxy" );
 339                 }
 340         }
 341
 342         /**
 343          * Set the referrer header
 344          */
 345         public function setReferer( $url ) {
 346                 $this->setHeader( 'Referer', $url );
 347         }
 348
 349         /**
 350          * Set the user agent
 351          * @param $UA string
 352          */
 353         public function setUserAgent( $UA ) {
 354                 $this->setHeader( 'User-Agent', $UA );
 355         }
 356
 357         /**
 358          * Set an arbitrary header
 359          * @param $name
 360          * @param $value
 361          */
 362         public function setHeader( $name, $value ) {
 363                 // I feel like I should normalize the case here...
 364                 $this->reqHeaders[$name] = $value;
 365         }
 366
 367         /**
 368          * Get an array of the headers
 369          * @return array
 370          */
 371         public function getHeaderList() {
 372                 $list = array();
 373
 374                 if ( $this->cookieJar ) {
 375                         $this->reqHeaders['Cookie'] =
 376                                 $this->cookieJar->serializeToHttpRequest(
 377                                         $this->parsedUrl['path'],
 378                                         $this->parsedUrl['host']
 379                                 );
 380                 }
 381
 382                 foreach ( $this->reqHeaders as $name => $value ) {
 383                         $list[] = "$name: $value";
 384                 }
 385
 386                 return $list;
 387         }
 388
 389         /**
 390          * Set a read callback to accept data read from the HTTP request.
 391          * By default, data is appended to an internal buffer which can be
 392          * retrieved through $req->getContent().
 393          *
 394          * To handle data as it comes in -- especially for large files that
 395          * would not fit in memory -- you can instead set your own callback,
 396          * in the form function($resource, $buffer) where the first parameter
 397          * is the low-level resource being read (implementation specific),
 398          * and the second parameter is the data buffer.
 399          *
 400          * You MUST return the number of bytes handled in the buffer; if fewer
 401          * bytes are reported handled than were passed to you, the HTTP fetch
 402          * will be aborted.
 403          *
 404          * @param $callback Callback
 405          * @throws MWException
 406          */
 407         public function setCallback( $callback ) {
 408                 if ( !is_callable( $callback ) ) {
 409                         throw new MWException( 'Invalid MwHttpRequest callback' );
 410                 }
 411                 $this->callback = $callback;
 412         }
 413
 414         /**
 415          * A generic callback to read the body of the response from a remote
 416          * server.
 417          *
 418          * @param $fh handle
 419          * @param $content String
 420          * @return int
 421          */
 422         public function read( $fh, $content ) {
 423                 $this->content .= $content;
 424                 return strlen( $content );
 425         }
 426
 427         /**
 428          * Take care of whatever is necessary to perform the URI request.
 429          *
 430          * @return Status
 431          */
 432         public function execute() {
 433                 global $wgTitle;
 434
 435                 wfProfileIn( __METHOD__ );
 436
 437                 $this->content = "";
 438
 439                 if ( strtoupper( $this->method ) == "HEAD" ) {
 440                         $this->headersOnly = true;
 441                 }
 442
 443                 if ( is_object( $wgTitle ) && !isset( $this->reqHeaders['Referer'] ) ) {
 444                         $this->setReferer( wfExpandUrl( $wgTitle->getFullURL(), PROTO_CURRENT ) );
 445                 }
 446
 447                 $this->proxySetup(); // set up any proxy as needed
 448
 449                 if ( !$this->callback ) {
 450                         $this->setCallback( array( $this, 'read' ) );
 451                 }
 452
 453                 if ( !isset( $this->reqHeaders['User-Agent'] ) ) {
 454                         $this->setUserAgent( Http::userAgent() );
 455                 }
 456
 457                 wfProfileOut( __METHOD__ );
 458         }
 459
 460         /**
 461          * Parses the headers, including the HTTP status code and any
 462          * Set-Cookie headers.  This function expects the headers to be
 463          * found in an array in the member variable headerList.
 464          */
 465         protected function parseHeader() {
 466                 wfProfileIn( __METHOD__ );
 467
 468                 $lastname = "";
 469
 470                 foreach ( $this->headerList as $header ) {
 471                         if ( preg_match( "#^HTTP/([0-9.]+) (.*)#", $header, $match ) ) {
 472                                 $this->respVersion = $match[1];
 473                                 $this->respStatus = $match[2];
 474                         } elseif ( preg_match( "#^[ \t]#", $header ) ) {
 475                                 $last = count( $this->respHeaders[$lastname] ) - 1;
 476                                 $this->respHeaders[$lastname][$last] .= "\r\n$header";
 477                         } elseif ( preg_match( "#^([^:]*):[\t ]*(.*)#", $header, $match ) ) {
 478                                 $this->respHeaders[strtolower( $match[1] )][] = $match[2];
 479                                 $lastname = strtolower( $match[1] );
 480                         }
 481                 }
 482
 483                 $this->parseCookies();
 484
 485                 wfProfileOut( __METHOD__ );
 486         }
 487
 488         /**
 489          * Sets HTTPRequest status member to a fatal value with the error
 490          * message if the returned integer value of the status code was
 491          * not successful (< 300) or a redirect (>=300 and < 400).  (see
 492          * RFC2616, section 10,
 493          * http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html for a
 494          * list of status codes.)
 495          */
 496         protected function setStatus() {
 497                 if ( !$this->respHeaders ) {
 498                         $this->parseHeader();
 499                 }
 500
 501                 if ( (int)$this->respStatus > 399 ) {
 502                         list( $code, $message ) = explode( " ", $this->respStatus, 2 );
 503                         $this->status->fatal( "http-bad-status", $code, $message );
 504                 }
 505         }
 506
 507         /**
 508          * Get the integer value of the HTTP status code (e.g. 200 for "200 Ok")
 509          * (see RFC2616, section 10, http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
 510          * for a list of status codes.)
 511          *
 512          * @return Integer
 513          */
 514         public function getStatus() {
 515                 if ( !$this->respHeaders ) {
 516                         $this->parseHeader();
 517                 }
 518
 519                 return (int)$this->respStatus;
 520         }
 521
 522         /**
 523          * Returns true if the last status code was a redirect.
 524          *
 525          * @return Boolean
 526          */
 527         public function isRedirect() {
 528                 if ( !$this->respHeaders ) {
 529                         $this->parseHeader();
 530                 }
 531
 532                 $status = (int)$this->respStatus;
 533
 534                 if ( $status >= 300 && $status <= 303 ) {
 535                         return true;
 536                 }
 537
 538                 return false;
 539         }
 540
 541         /**
 542          * Returns an associative array of response headers after the
 543          * request has been executed.  Because some headers
 544          * (e.g. Set-Cookie) can appear more than once the, each value of
 545          * the associative array is an array of the values given.
 546          *
 547          * @return Array
 548          */
 549         public function getResponseHeaders() {
 550                 if ( !$this->respHeaders ) {
 551                         $this->parseHeader();
 552                 }
 553
 554                 return $this->respHeaders;
 555         }
 556
 557         /**
 558          * Returns the value of the given response header.
 559          *
 560          * @param $header String
 561          * @return String
 562          */
 563         public function getResponseHeader( $header ) {
 564                 if ( !$this->respHeaders ) {
 565                         $this->parseHeader();
 566                 }
 567
 568                 if ( isset( $this->respHeaders[strtolower ( $header ) ] ) ) {
 569                         $v = $this->respHeaders[strtolower ( $header ) ];
 570                         return $v[count( $v ) - 1];
 571                 }
 572
 573                 return null;
 574         }
 575
 576         /**
 577          * Tells the MWHttpRequest object to use this pre-loaded CookieJar.
 578          *
 579          * @param $jar CookieJar
 580          */
 581         public function setCookieJar( $jar ) {
 582                 $this->cookieJar = $jar;
 583         }
 584
 585         /**
 586          * Returns the cookie jar in use.
 587          *
 588          * @return CookieJar
 589          */
 590         public function getCookieJar() {
 591                 if ( !$this->respHeaders ) {
 592                         $this->parseHeader();
 593                 }
 594
 595                 return $this->cookieJar;
 596         }
 597
 598         /**
 599          * Sets a cookie. Used before a request to set up any individual
 600          * cookies. Used internally after a request to parse the
 601          * Set-Cookie headers.
 602          * @see Cookie::set
 603          * @param $name
 604          * @param $value null
 605          * @param $attr null
 606          */
 607         public function setCookie( $name, $value = null, $attr = null ) {
 608                 if ( !$this->cookieJar ) {
 609                         $this->cookieJar = new CookieJar;
 610                 }
 611
 612                 $this->cookieJar->setCookie( $name, $value, $attr );
 613         }
 614
 615         /**
 616          * Parse the cookies in the response headers and store them in the cookie jar.
 617          */
 618         protected function parseCookies() {
 619                 wfProfileIn( __METHOD__ );
 620
 621                 if ( !$this->cookieJar ) {
 622                         $this->cookieJar = new CookieJar;
 623                 }
 624
 625                 if ( isset( $this->respHeaders['set-cookie'] ) ) {
 626                         $url = parse_url( $this->getFinalUrl() );
 627                         foreach ( $this->respHeaders['set-cookie'] as $cookie ) {
 628                                 $this->cookieJar->parseCookieResponseHeader( $cookie, $url['host'] );
 629                         }
 630                 }
 631
 632                 wfProfileIn( __METHOD__ );
 633         }
 634
 635         /**
 636          * Returns the final URL after all redirections.
 637          *
 638          * Relative values of the "Location" header are incorrect as stated in RFC, however they do happen and modern browsers support them.
 639          * This function loops backwards through all locations in order to build the proper absolute URI - Marooned at wikia-inc.com
 640          *
 641          * Note that the multiple Location: headers are an artifact of CURL -- they
 642          * shouldn't actually get returned this way. Rewrite this when bug 29232 is
 643          * taken care of (high-level redirect handling rewrite).
 644          *
 645          * @return string
 646          */
 647         public function getFinalUrl() {
 648                 $headers = $this->getResponseHeaders();
 649
 650                 //return full url (fix for incorrect but handled relative location)
 651                 if ( isset( $headers[ 'location' ] ) ) {
 652                         $locations = $headers[ 'location' ];
 653                         $domain = '';
 654                         $foundRelativeURI = false;
 655                         $countLocations = count( $locations );
 656
 657                         for ( $i = $countLocations - 1; $i >= 0; $i-- ) {
 658                                 $url = parse_url( $locations[ $i ] );
 659
 660                                 if ( isset( $url['host'] ) ) {
 661                                         $domain = $url[ 'scheme' ] . '://' . $url[ 'host' ];
 662                                         break; //found correct URI (with host)
 663                                 } else {
 664                                         $foundRelativeURI = true;
 665                                 }
 666                         }
 667
 668                         if ( $foundRelativeURI ) {
 669                                 if ( $domain ) {
 670                                         return $domain . $locations[ $countLocations - 1 ];
 671                                 } else {
 672                                         $url = parse_url( $this->url );
 673                                         if ( isset($url[ 'host' ]) ) {
 674                                                 return $url[ 'scheme' ] . '://' . $url[ 'host' ] . $locations[ $countLocations - 1 ];
 675                                         }
 676                                 }
 677                         } else {
 678                                 return $locations[ $countLocations - 1 ];
 679                         }
 680                 }
 681
 682                 return $this->url;
 683         }
 684
 685         /**
 686          * Returns true if the backend can follow redirects. Overridden by the
 687          * child classes.
 688          * @return bool
 689          */
 690         public function canFollowRedirects() {
 691                 return true;
 692         }
 693 }
 694
 695 /**
 696  * MWHttpRequest implemented using internal curl compiled into PHP
 697  */
 698 class CurlHttpRequest extends MWHttpRequest {
 699         const SUPPORTS_FILE_POSTS = true;
 700
 701         static $curlMessageMap = array(
 702                 6 => 'http-host-unreachable',
 703                 28 => 'http-timed-out'
 704         );
 705
 706         protected $curlOptions = array();
 707         protected $headerText = "";
 708
 709         /**
 710          * @param $fh
 711          * @param $content
 712          * @return int
 713          */
 714         protected function readHeader( $fh, $content ) {
 715                 $this->headerText .= $content;
 716                 return strlen( $content );
 717         }
 718
 719         public function execute() {
 720                 wfProfileIn( __METHOD__ );
 721
 722                 parent::execute();
 723
 724                 if ( !$this->status->isOK() ) {
 725                         wfProfileOut( __METHOD__ );
 726                         return $this->status;
 727                 }
 728
 729                 $this->curlOptions[CURLOPT_PROXY] = $this->proxy;
 730                 $this->curlOptions[CURLOPT_TIMEOUT] = $this->timeout;
 731                 $this->curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_0;
 732                 $this->curlOptions[CURLOPT_WRITEFUNCTION] = $this->callback;
 733                 $this->curlOptions[CURLOPT_HEADERFUNCTION] = array( $this, "readHeader" );
 734                 $this->curlOptions[CURLOPT_MAXREDIRS] = $this->maxRedirects;
 735                 $this->curlOptions[CURLOPT_ENCODING] = ""; # Enable compression
 736
 737                 /* not sure these two are actually necessary */
 738                 if ( isset( $this->reqHeaders['Referer'] ) ) {
 739                         $this->curlOptions[CURLOPT_REFERER] = $this->reqHeaders['Referer'];
 740                 }
 741                 $this->curlOptions[CURLOPT_USERAGENT] = $this->reqHeaders['User-Agent'];
 742
 743                 $this->curlOptions[CURLOPT_SSL_VERIFYHOST] = $this->sslVerifyHost ? 2 : 0;
 744                 $this->curlOptions[CURLOPT_SSL_VERIFYPEER] = $this->sslVerifyCert;
 745
 746                 if ( $this->caInfo ) {
 747                         $this->curlOptions[CURLOPT_CAINFO] = $this->caInfo;
 748                 }
 749
 750                 if ( $this->headersOnly ) {
 751                         $this->curlOptions[CURLOPT_NOBODY] = true;
 752                         $this->curlOptions[CURLOPT_HEADER] = true;
 753                 } elseif ( $this->method == 'POST' ) {
 754                         $this->curlOptions[CURLOPT_POST] = true;
 755                         $this->curlOptions[CURLOPT_POSTFIELDS] = $this->postData;
 756                         // Suppress 'Expect: 100-continue' header, as some servers
 757                         // will reject it with a 417 and Curl won't auto retry
 758                         // with HTTP 1.0 fallback
 759                         $this->reqHeaders['Expect'] = '';
 760                 } else {
 761                         $this->curlOptions[CURLOPT_CUSTOMREQUEST] = $this->method;
 762                 }
 763
 764                 $this->curlOptions[CURLOPT_HTTPHEADER] = $this->getHeaderList();
 765
 766                 $curlHandle = curl_init( $this->url );
 767
 768                 if ( !curl_setopt_array( $curlHandle, $this->curlOptions ) ) {
 769                         wfProfileOut( __METHOD__ );
 770                         throw new MWException( "Error setting curl options." );
 771                 }
 772
 773                 if ( $this->followRedirects && $this->canFollowRedirects() ) {
 774                         wfSuppressWarnings();
 775                         if ( ! curl_setopt( $curlHandle, CURLOPT_FOLLOWLOCATION, true ) ) {
 776                                 wfDebug( __METHOD__ . ": Couldn't set CURLOPT_FOLLOWLOCATION. " .
 777                                         "Probably safe_mode or open_basedir is set.\n" );
 778                                 // Continue the processing. If it were in curl_setopt_array,
 779                                 // processing would have halted on its entry
 780                         }
 781                         wfRestoreWarnings();
 782                 }
 783
 784                 if ( false === curl_exec( $curlHandle ) ) {
 785                         $code = curl_error( $curlHandle );
 786
 787                         if ( isset( self::$curlMessageMap[$code] ) ) {
 788                                 $this->status->fatal( self::$curlMessageMap[$code] );
 789                         } else {
 790                                 $this->status->fatal( 'http-curl-error', curl_error( $curlHandle ) );
 791                         }
 792                 } else {
 793                         $this->headerList = explode( "\r\n", $this->headerText );
 794                 }
 795
 796                 curl_close( $curlHandle );
 797
 798                 $this->parseHeader();
 799                 $this->setStatus();
 800
 801                 wfProfileOut( __METHOD__ );
 802
 803                 return $this->status;
 804         }
 805
 806         /**
 807          * @return bool
 808          */
 809         public function canFollowRedirects() {
 810                 if ( strval( ini_get( 'open_basedir' ) ) !== '' || wfIniGetBool( 'safe_mode' ) ) {
 811                         wfDebug( "Cannot follow redirects in safe mode\n" );
 812                         return false;
 813                 }
 814
 815                 if ( !defined( 'CURLOPT_REDIR_PROTOCOLS' ) ) {
 816                         wfDebug( "Cannot follow redirects with libcurl < 7.19.4 due to CVE-2009-0037\n" );
 817                         return false;
 818                 }
 819
 820                 return true;
 821         }
 822 }
 823
 824 class PhpHttpRequest extends MWHttpRequest {
 825
 826         /**
 827          * @param $url string
 828          * @return string
 829          */
 830         protected function urlToTcp( $url ) {
 831                 $parsedUrl = parse_url( $url );
 832
 833                 return 'tcp://' . $parsedUrl['host'] . ':' . $parsedUrl['port'];
 834         }
 835
 836         public function execute() {
 837                 wfProfileIn( __METHOD__ );
 838
 839                 parent::execute();
 840
 841                 if ( is_array( $this->postData ) ) {
 842                         $this->postData = wfArrayToCgi( $this->postData );
 843                 }
 844
 845                 if ( $this->parsedUrl['scheme'] != 'http' &&
 846                          $this->parsedUrl['scheme'] != 'https' ) {
 847                         $this->status->fatal( 'http-invalid-scheme', $this->parsedUrl['scheme'] );
 848                 }
 849
 850                 $this->reqHeaders['Accept'] = "*/*";
 851                 if ( $this->method == 'POST' ) {
 852                         // Required for HTTP 1.0 POSTs
 853                         $this->reqHeaders['Content-Length'] = strlen( $this->postData );
 854                         if( !isset( $this->reqHeaders['Content-Type'] ) ) {
 855                                 $this->reqHeaders['Content-Type'] = "application/x-www-form-urlencoded";
 856                         }
 857                 }
 858
 859                 $options = array();
 860                 if ( $this->proxy ) {
 861                         $options['proxy'] = $this->urlToTCP( $this->proxy );
 862                         $options['request_fulluri'] = true;
 863                 }
 864
 865                 if ( !$this->followRedirects ) {
 866                         $options['max_redirects'] = 0;
 867                 } else {
 868                         $options['max_redirects'] = $this->maxRedirects;
 869                 }
 870
 871                 $options['method'] = $this->method;
 872                 $options['header'] = implode( "\r\n", $this->getHeaderList() );
 873                 // Note that at some future point we may want to support
 874                 // HTTP/1.1, but we'd have to write support for chunking
 875                 // in version of PHP < 5.3.1
 876                 $options['protocol_version'] = "1.0";
 877
 878                 // This is how we tell PHP we want to deal with 404s (for example) ourselves.
 879                 // Only works on 5.2.10+
 880                 $options['ignore_errors'] = true;
 881
 882                 if ( $this->postData ) {
 883                         $options['content'] = $this->postData;
 884                 }
 885
 886                 $options['timeout'] = $this->timeout;
 887
 888                 $context = stream_context_create( array( 'http' => $options ) );
 889
 890                 $this->headerList = array();
 891                 $reqCount = 0;
 892                 $url = $this->url;
 893
 894                 $result = array();
 895
 896                 do {
 897                         $reqCount++;
 898                         wfSuppressWarnings();
 899                         $fh = fopen( $url, "r", false, $context );
 900                         wfRestoreWarnings();
 901
 902                         if ( !$fh ) {
 903                                 break;
 904                         }
 905
 906                         $result = stream_get_meta_data( $fh );
 907                         $this->headerList = $result['wrapper_data'];
 908                         $this->parseHeader();
 909
 910                         if ( !$this->followRedirects ) {
 911                                 break;
 912                         }
 913
 914                         # Handle manual redirection
 915                         if ( !$this->isRedirect() || $reqCount > $this->maxRedirects ) {
 916                                 break;
 917                         }
 918                         # Check security of URL
 919                         $url = $this->getResponseHeader( "Location" );
 920
 921                         if ( !Http::isValidURI( $url ) ) {
 922                                 wfDebug( __METHOD__ . ": insecure redirection\n" );
 923                                 break;
 924                         }
 925                 } while ( true );
 926
 927                 $this->setStatus();
 928
 929                 if ( $fh === false ) {
 930                         $this->status->fatal( 'http-request-error' );
 931                         wfProfileOut( __METHOD__ );
 932                         return $this->status;
 933                 }
 934
 935                 if ( $result['timed_out'] ) {
 936                         $this->status->fatal( 'http-timed-out', $this->url );
 937                         wfProfileOut( __METHOD__ );
 938                         return $this->status;
 939                 }
 940
 941                 // If everything went OK, or we received some error code
 942                 // get the response body content.
 943                 if ( $this->status->isOK()
 944                                 || (int)$this->respStatus >= 300) {
 945                         while ( !feof( $fh ) ) {
 946                                 $buf = fread( $fh, 8192 );
 947
 948                                 if ( $buf === false ) {
 949                                         $this->status->fatal( 'http-read-error' );
 950                                         break;
 951                                 }
 952
 953                                 if ( strlen( $buf ) ) {
 954                                         call_user_func( $this->callback, $fh, $buf );
 955                                 }
 956                         }
 957                 }
 958                 fclose( $fh );
 959
 960                 wfProfileOut( __METHOD__ );
 961
 962                 return $this->status;
 963         }
 964 }