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 public $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          *    - connectTimeout      Timeout for connection, in seconds (curl only)
  44          *    - postData            An array of key-value pairs or a url-encoded form data
  45          *    - proxy               The proxy to use.
  46          *                          Otherwise it will use $wgHTTPProxy (if set)
  47          *                          Otherwise it will use the environment variable "http_proxy" (if set)
  48          *    - noProxy             Don't use any proxy at all. Takes precedence over proxy value(s).
  49          *    - sslVerifyHost       Verify hostname against certificate
  50          *    - sslVerifyCert       Verify SSL certificate
  51          *    - caInfo              Provide CA information
  52          *    - maxRedirects        Maximum number of redirects to follow (defaults to 5)
  53          *    - followRedirects     Whether to follow redirects (defaults to false).
  54          *                                  Note: this should only be used when the target URL is trusted,
  55          *                                  to avoid attacks on intranet services accessible by HTTP.
  56          *    - userAgent           A user agent, if you want to override the default
  57          *                          MediaWiki/$wgVersion
  58          * @return string|bool (bool)false on failure or a string on success
  59          */
  60         public static function request( $method, $url, $options = array() ) {
  61                 wfDebug( "HTTP: $method: $url\n" );
  62
  63                 $options['method'] = strtoupper( $method );
  64
  65                 if ( !isset( $options['timeout'] ) ) {
  66                         $options['timeout'] = 'default';
  67                 }
  68                 if ( !isset( $options['connectTimeout'] ) ) {
  69                         $options['connectTimeout'] = 'default';
  70                 }
  71
  72                 $req = MWHttpRequest::factory( $url, $options );
  73                 $status = $req->execute();
  74
  75                 $content = false;
  76                 if ( $status->isOK() ) {
  77                         $content = $req->getContent();
  78                 }
  79                 return $content;
  80         }
  81
  82         /**
  83          * Simple wrapper for Http::request( 'GET' )
  84          * @see Http::request()
  85          *
  86          * @param string $url
  87          * @param string $timeout
  88          * @param array $options
  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 string $url
 101          * @param array $options
 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 bool
 113          */
 114         public static function isLocalURL( $url ) {
 115                 global $wgCommandLineMode, $wgLocalVirtualHosts, $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 as a local virtual host
 128                         $domainParts = array_reverse( $domainParts );
 129
 130                         $domain = '';
 131                         $countParts = count( $domainParts );
 132                         for ( $i = 0; $i < $countParts; $i++ ) {
 133                                 $domainPart = $domainParts[$i];
 134                                 if ( $i == 0 ) {
 135                                         $domain = $domainPart;
 136                                 } else {
 137                                         $domain = $domainPart . '.' . $domain;
 138                                 }
 139
 140                                 if ( in_array( $domain, $wgLocalVirtualHosts )
 141                                         || $wgConf->isLocalVHost( $domain )
 142                                 ) {
 143                                         return true;
 144                                 }
 145                         }
 146                 }
 147
 148                 return false;
 149         }
 150
 151         /**
 152          * A standard user-agent we can use for external requests.
 153          * @return string
 154          */
 155         public static function userAgent() {
 156                 global $wgVersion;
 157                 return "MediaWiki/$wgVersion";
 158         }
 159
 160         /**
 161          * Checks that the given URI is a valid one. Hardcoding the
 162          * protocols, because we only want protocols that both cURL
 163          * and php support.
 164          *
 165          * file:// should not be allowed here for security purpose (r67684)
 166          *
 167          * @todo FIXME this is wildly inaccurate and fails to actually check most stuff
 168          *
 169          * @param string $uri URI to check for validity
 170          * @return bool
 171          */
 172         public static function isValidURI( $uri ) {
 173                 return preg_match(
 174                         '/^https?:\/\/[^\/\s]\S*$/D',
 175                         $uri
 176                 );
 177         }
 178 }
 179
 180 /**
 181  * This wrapper class will call out to curl (if available) or fallback
 182  * to regular PHP if necessary for handling internal HTTP requests.
 183  *
 184  * Renamed from HttpRequest to MWHttpRequest to avoid conflict with
 185  * PHP's HTTP extension.
 186  */
 187 class MWHttpRequest {
 188         const SUPPORTS_FILE_POSTS = false;
 189
 190         protected $content;
 191         protected $timeout = 'default';
 192         protected $headersOnly = null;
 193         protected $postData = null;
 194         protected $proxy = null;
 195         protected $noProxy = false;
 196         protected $sslVerifyHost = true;
 197         protected $sslVerifyCert = true;
 198         protected $caInfo = null;
 199         protected $method = "GET";
 200         protected $reqHeaders = array();
 201         protected $url;
 202         protected $parsedUrl;
 203         protected $callback;
 204         protected $maxRedirects = 5;
 205         protected $followRedirects = false;
 206
 207         /**
 208          * @var CookieJar
 209          */
 210         protected $cookieJar;
 211
 212         protected $headerList = array();
 213         protected $respVersion = "0.9";
 214         protected $respStatus = "200 Ok";
 215         protected $respHeaders = array();
 216
 217         public $status;
 218
 219         /**
 220          * @param string $url Url to use. If protocol-relative, will be expanded to an http:// URL
 221          * @param array $options (optional) extra params to pass (see Http::request())
 222          */
 223         protected function __construct( $url, $options = array() ) {
 224                 global $wgHTTPTimeout, $wgHTTPConnectTimeout;
 225
 226                 $this->url = wfExpandUrl( $url, PROTO_HTTP );
 227                 $this->parsedUrl = wfParseUrl( $this->url );
 228
 229                 if ( !$this->parsedUrl || !Http::isValidURI( $this->url ) ) {
 230                         $this->status = Status::newFatal( 'http-invalid-url' );
 231                 } else {
 232                         $this->status = Status::newGood( 100 ); // continue
 233                 }
 234
 235                 if ( isset( $options['timeout'] ) && $options['timeout'] != 'default' ) {
 236                         $this->timeout = $options['timeout'];
 237                 } else {
 238                         $this->timeout = $wgHTTPTimeout;
 239                 }
 240                 if ( isset( $options['connectTimeout'] ) && $options['connectTimeout'] != 'default' ) {
 241                         $this->connectTimeout = $options['connectTimeout'];
 242                 } else {
 243                         $this->connectTimeout = $wgHTTPConnectTimeout;
 244                 }
 245                 if ( isset( $options['userAgent'] ) ) {
 246                         $this->setUserAgent( $options['userAgent'] );
 247                 }
 248
 249                 $members = array( "postData", "proxy", "noProxy", "sslVerifyHost", "caInfo",
 250                                 "method", "followRedirects", "maxRedirects", "sslVerifyCert", "callback" );
 251
 252                 foreach ( $members as $o ) {
 253                         if ( isset( $options[$o] ) ) {
 254                                 // ensure that MWHttpRequest::method is always
 255                                 // uppercased. Bug 36137
 256                                 if ( $o == 'method' ) {
 257                                         $options[$o] = strtoupper( $options[$o] );
 258                                 }
 259                                 $this->$o = $options[$o];
 260                         }
 261                 }
 262
 263                 if ( $this->noProxy ) {
 264                         $this->proxy = ''; // noProxy takes precedence
 265                 }
 266         }
 267
 268         /**
 269          * Simple function to test if we can make any sort of requests at all, using
 270          * cURL or fopen()
 271          * @return bool
 272          */
 273         public static function canMakeRequests() {
 274                 return function_exists( 'curl_init' ) || wfIniGetBool( 'allow_url_fopen' );
 275         }
 276
 277         /**
 278          * Generate a new request object
 279          * @param string $url Url to use
 280          * @param array $options (optional) extra params to pass (see Http::request())
 281          * @throws MWException
 282          * @return CurlHttpRequest|PhpHttpRequest
 283          * @see MWHttpRequest::__construct
 284          */
 285         public static function factory( $url, $options = null ) {
 286                 if ( !Http::$httpEngine ) {
 287                         Http::$httpEngine = function_exists( 'curl_init' ) ? 'curl' : 'php';
 288                 } elseif ( Http::$httpEngine == 'curl' && !function_exists( 'curl_init' ) ) {
 289                         throw new MWException( __METHOD__ . ': curl (http://php.net/curl) is not installed, but' .
 290                                 ' Http::$httpEngine is set to "curl"' );
 291                 }
 292
 293                 switch ( Http::$httpEngine ) {
 294                         case 'curl':
 295                                 return new CurlHttpRequest( $url, $options );
 296                         case 'php':
 297                                 if ( !wfIniGetBool( 'allow_url_fopen' ) ) {
 298                                         throw new MWException( __METHOD__ . ': allow_url_fopen ' .
 299                                                 'needs to be enabled for pure PHP http requests to ' .
 300                                                 'work. If possible, curl should be used instead. See ' .
 301                                                 'http://php.net/curl.'
 302                                         );
 303                                 }
 304                                 return new PhpHttpRequest( $url, $options );
 305                         default:
 306                                 throw new MWException( __METHOD__ . ': The setting of Http::$httpEngine is not valid.' );
 307                 }
 308         }
 309
 310         /**
 311          * Get the body, or content, of the response to the request
 312          *
 313          * @return string
 314          */
 315         public function getContent() {
 316                 return $this->content;
 317         }
 318
 319         /**
 320          * Set the parameters of the request
 321          *
 322          * @param array $args
 323          * @todo overload the args param
 324          */
 325         public function setData( $args ) {
 326                 $this->postData = $args;
 327         }
 328
 329         /**
 330          * Take care of setting up the proxy (do nothing if "noProxy" is set)
 331          *
 332          * @return void
 333          */
 334         public function proxySetup() {
 335                 global $wgHTTPProxy;
 336
 337                 // If there is an explicit proxy set and proxies are not disabled, then use it
 338                 if ( $this->proxy && !$this->noProxy ) {
 339                         return;
 340                 }
 341
 342                 // Otherwise, fallback to $wgHTTPProxy/http_proxy (when set) if this is not a machine
 343                 // local URL and proxies are not disabled
 344                 if ( Http::isLocalURL( $this->url ) || $this->noProxy ) {
 345                         $this->proxy = '';
 346                 } elseif ( $wgHTTPProxy ) {
 347                         $this->proxy = $wgHTTPProxy;
 348                 } elseif ( getenv( "http_proxy" ) ) {
 349                         $this->proxy = getenv( "http_proxy" );
 350                 }
 351         }
 352
 353         /**
 354          * Set the user agent
 355          * @param string $UA
 356          */
 357         public function setUserAgent( $UA ) {
 358                 $this->setHeader( 'User-Agent', $UA );
 359         }
 360
 361         /**
 362          * Set an arbitrary header
 363          * @param string $name
 364          * @param string $value
 365          */
 366         public function setHeader( $name, $value ) {
 367                 // I feel like I should normalize the case here...
 368                 $this->reqHeaders[$name] = $value;
 369         }
 370
 371         /**
 372          * Get an array of the headers
 373          * @return array
 374          */
 375         public function getHeaderList() {
 376                 $list = array();
 377
 378                 if ( $this->cookieJar ) {
 379                         $this->reqHeaders['Cookie'] =
 380                                 $this->cookieJar->serializeToHttpRequest(
 381                                         $this->parsedUrl['path'],
 382                                         $this->parsedUrl['host']
 383                                 );
 384                 }
 385
 386                 foreach ( $this->reqHeaders as $name => $value ) {
 387                         $list[] = "$name: $value";
 388                 }
 389
 390                 return $list;
 391         }
 392
 393         /**
 394          * Set a read callback to accept data read from the HTTP request.
 395          * By default, data is appended to an internal buffer which can be
 396          * retrieved through $req->getContent().
 397          *
 398          * To handle data as it comes in -- especially for large files that
 399          * would not fit in memory -- you can instead set your own callback,
 400          * in the form function($resource, $buffer) where the first parameter
 401          * is the low-level resource being read (implementation specific),
 402          * and the second parameter is the data buffer.
 403          *
 404          * You MUST return the number of bytes handled in the buffer; if fewer
 405          * bytes are reported handled than were passed to you, the HTTP fetch
 406          * will be aborted.
 407          *
 408          * @param callable $callback
 409          * @throws MWException
 410          */
 411         public function setCallback( $callback ) {
 412                 if ( !is_callable( $callback ) ) {
 413                         throw new MWException( 'Invalid MwHttpRequest callback' );
 414                 }
 415                 $this->callback = $callback;
 416         }
 417
 418         /**
 419          * A generic callback to read the body of the response from a remote
 420          * server.
 421          *
 422          * @param resource $fh
 423          * @param string $content
 424          * @return int
 425          */
 426         public function read( $fh, $content ) {
 427                 $this->content .= $content;
 428                 return strlen( $content );
 429         }
 430
 431         /**
 432          * Take care of whatever is necessary to perform the URI request.
 433          *
 434          * @return Status
 435          */
 436         public function execute() {
 437
 438                 $this->content = "";
 439
 440                 if ( strtoupper( $this->method ) == "HEAD" ) {
 441                         $this->headersOnly = true;
 442                 }
 443
 444                 $this->proxySetup(); // set up any proxy as needed
 445
 446                 if ( !$this->callback ) {
 447                         $this->setCallback( array( $this, 'read' ) );
 448                 }
 449
 450                 if ( !isset( $this->reqHeaders['User-Agent'] ) ) {
 451                         $this->setUserAgent( Http::userAgent() );
 452                 }
 453
 454         }
 455
 456         /**
 457          * Parses the headers, including the HTTP status code and any
 458          * Set-Cookie headers.  This function expects the headers to be
 459          * found in an array in the member variable headerList.
 460          */
 461         protected function parseHeader() {
 462
 463                 $lastname = "";
 464
 465                 foreach ( $this->headerList as $header ) {
 466                         if ( preg_match( "#^HTTP/([0-9.]+) (.*)#", $header, $match ) ) {
 467                                 $this->respVersion = $match[1];
 468                                 $this->respStatus = $match[2];
 469                         } elseif ( preg_match( "#^[ \t]#", $header ) ) {
 470                                 $last = count( $this->respHeaders[$lastname] ) - 1;
 471                                 $this->respHeaders[$lastname][$last] .= "\r\n$header";
 472                         } elseif ( preg_match( "#^([^:]*):[\t ]*(.*)#", $header, $match ) ) {
 473                                 $this->respHeaders[strtolower( $match[1] )][] = $match[2];
 474                                 $lastname = strtolower( $match[1] );
 475                         }
 476                 }
 477
 478                 $this->parseCookies();
 479
 480         }
 481
 482         /**
 483          * Sets HTTPRequest status member to a fatal value with the error
 484          * message if the returned integer value of the status code was
 485          * not successful (< 300) or a redirect (>=300 and < 400).  (see
 486          * RFC2616, section 10,
 487          * http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html for a
 488          * list of status codes.)
 489          */
 490         protected function setStatus() {
 491                 if ( !$this->respHeaders ) {
 492                         $this->parseHeader();
 493                 }
 494
 495                 if ( (int)$this->respStatus > 399 ) {
 496                         list( $code, $message ) = explode( " ", $this->respStatus, 2 );
 497                         $this->status->fatal( "http-bad-status", $code, $message );
 498                 }
 499         }
 500
 501         /**
 502          * Get the integer value of the HTTP status code (e.g. 200 for "200 Ok")
 503          * (see RFC2616, section 10, http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
 504          * for a list of status codes.)
 505          *
 506          * @return int
 507          */
 508         public function getStatus() {
 509                 if ( !$this->respHeaders ) {
 510                         $this->parseHeader();
 511                 }
 512
 513                 return (int)$this->respStatus;
 514         }
 515
 516         /**
 517          * Returns true if the last status code was a redirect.
 518          *
 519          * @return bool
 520          */
 521         public function isRedirect() {
 522                 if ( !$this->respHeaders ) {
 523                         $this->parseHeader();
 524                 }
 525
 526                 $status = (int)$this->respStatus;
 527
 528                 if ( $status >= 300 && $status <= 303 ) {
 529                         return true;
 530                 }
 531
 532                 return false;
 533         }
 534
 535         /**
 536          * Returns an associative array of response headers after the
 537          * request has been executed.  Because some headers
 538          * (e.g. Set-Cookie) can appear more than once the, each value of
 539          * the associative array is an array of the values given.
 540          *
 541          * @return array
 542          */
 543         public function getResponseHeaders() {
 544                 if ( !$this->respHeaders ) {
 545                         $this->parseHeader();
 546                 }
 547
 548                 return $this->respHeaders;
 549         }
 550
 551         /**
 552          * Returns the value of the given response header.
 553          *
 554          * @param string $header
 555          * @return string
 556          */
 557         public function getResponseHeader( $header ) {
 558                 if ( !$this->respHeaders ) {
 559                         $this->parseHeader();
 560                 }
 561
 562                 if ( isset( $this->respHeaders[strtolower( $header )] ) ) {
 563                         $v = $this->respHeaders[strtolower( $header )];
 564                         return $v[count( $v ) - 1];
 565                 }
 566
 567                 return null;
 568         }
 569
 570         /**
 571          * Tells the MWHttpRequest object to use this pre-loaded CookieJar.
 572          *
 573          * @param CookieJar $jar
 574          */
 575         public function setCookieJar( $jar ) {
 576                 $this->cookieJar = $jar;
 577         }
 578
 579         /**
 580          * Returns the cookie jar in use.
 581          *
 582          * @return CookieJar
 583          */
 584         public function getCookieJar() {
 585                 if ( !$this->respHeaders ) {
 586                         $this->parseHeader();
 587                 }
 588
 589                 return $this->cookieJar;
 590         }
 591
 592         /**
 593          * Sets a cookie. Used before a request to set up any individual
 594          * cookies. Used internally after a request to parse the
 595          * Set-Cookie headers.
 596          * @see Cookie::set
 597          * @param string $name
 598          * @param mixed $value
 599          * @param array $attr
 600          */
 601         public function setCookie( $name, $value = null, $attr = null ) {
 602                 if ( !$this->cookieJar ) {
 603                         $this->cookieJar = new CookieJar;
 604                 }
 605
 606                 $this->cookieJar->setCookie( $name, $value, $attr );
 607         }
 608
 609         /**
 610          * Parse the cookies in the response headers and store them in the cookie jar.
 611          */
 612         protected function parseCookies() {
 613
 614                 if ( !$this->cookieJar ) {
 615                         $this->cookieJar = new CookieJar;
 616                 }
 617
 618                 if ( isset( $this->respHeaders['set-cookie'] ) ) {
 619                         $url = parse_url( $this->getFinalUrl() );
 620                         foreach ( $this->respHeaders['set-cookie'] as $cookie ) {
 621                                 $this->cookieJar->parseCookieResponseHeader( $cookie, $url['host'] );
 622                         }
 623                 }
 624
 625         }
 626
 627         /**
 628          * Returns the final URL after all redirections.
 629          *
 630          * Relative values of the "Location" header are incorrect as
 631          * stated in RFC, however they do happen and modern browsers
 632          * support them.  This function loops backwards through all
 633          * locations in order to build the proper absolute URI - Marooned
 634          * at wikia-inc.com
 635          *
 636          * Note that the multiple Location: headers are an artifact of
 637          * CURL -- they shouldn't actually get returned this way. Rewrite
 638          * this when bug 29232 is taken care of (high-level redirect
 639          * handling rewrite).
 640          *
 641          * @return string
 642          */
 643         public function getFinalUrl() {
 644                 $headers = $this->getResponseHeaders();
 645
 646                 //return full url (fix for incorrect but handled relative location)
 647                 if ( isset( $headers['location'] ) ) {
 648                         $locations = $headers['location'];
 649                         $domain = '';
 650                         $foundRelativeURI = false;
 651                         $countLocations = count( $locations );
 652
 653                         for ( $i = $countLocations - 1; $i >= 0; $i-- ) {
 654                                 $url = parse_url( $locations[$i] );
 655
 656                                 if ( isset( $url['host'] ) ) {
 657                                         $domain = $url['scheme'] . '://' . $url['host'];
 658                                         break; //found correct URI (with host)
 659                                 } else {
 660                                         $foundRelativeURI = true;
 661                                 }
 662                         }
 663
 664                         if ( $foundRelativeURI ) {
 665                                 if ( $domain ) {
 666                                         return $domain . $locations[$countLocations - 1];
 667                                 } else {
 668                                         $url = parse_url( $this->url );
 669                                         if ( isset( $url['host'] ) ) {
 670                                                 return $url['scheme'] . '://' . $url['host'] .
 671                                                         $locations[$countLocations - 1];
 672                                         }
 673                                 }
 674                         } else {
 675                                 return $locations[$countLocations - 1];
 676                         }
 677                 }
 678
 679                 return $this->url;
 680         }
 681
 682         /**
 683          * Returns true if the backend can follow redirects. Overridden by the
 684          * child classes.
 685          * @return bool
 686          */
 687         public function canFollowRedirects() {
 688                 return true;
 689         }
 690 }
 691
 692 /**
 693  * MWHttpRequest implemented using internal curl compiled into PHP
 694  */
 695 class CurlHttpRequest extends MWHttpRequest {
 696         const SUPPORTS_FILE_POSTS = true;
 697
 698         protected $curlOptions = array();
 699         protected $headerText = "";
 700
 701         /**
 702          * @param resource $fh
 703          * @param string $content
 704          * @return int
 705          */
 706         protected function readHeader( $fh, $content ) {
 707                 $this->headerText .= $content;
 708                 return strlen( $content );
 709         }
 710
 711         public function execute() {
 712
 713                 parent::execute();
 714
 715                 if ( !$this->status->isOK() ) {
 716                         return $this->status;
 717                 }
 718
 719                 $this->curlOptions[CURLOPT_PROXY] = $this->proxy;
 720                 $this->curlOptions[CURLOPT_TIMEOUT] = $this->timeout;
 721
 722                 // Only supported in curl >= 7.16.2
 723                 if ( defined( 'CURLOPT_CONNECTTIMEOUT_MS' ) ) {
 724                         $this->curlOptions[CURLOPT_CONNECTTIMEOUT_MS] = $this->connectTimeout * 1000;
 725                 }
 726
 727                 $this->curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_0;
 728                 $this->curlOptions[CURLOPT_WRITEFUNCTION] = $this->callback;
 729                 $this->curlOptions[CURLOPT_HEADERFUNCTION] = array( $this, "readHeader" );
 730                 $this->curlOptions[CURLOPT_MAXREDIRS] = $this->maxRedirects;
 731                 $this->curlOptions[CURLOPT_ENCODING] = ""; # Enable compression
 732
 733                 $this->curlOptions[CURLOPT_USERAGENT] = $this->reqHeaders['User-Agent'];
 734
 735                 $this->curlOptions[CURLOPT_SSL_VERIFYHOST] = $this->sslVerifyHost ? 2 : 0;
 736                 $this->curlOptions[CURLOPT_SSL_VERIFYPEER] = $this->sslVerifyCert;
 737
 738                 if ( $this->caInfo ) {
 739                         $this->curlOptions[CURLOPT_CAINFO] = $this->caInfo;
 740                 }
 741
 742                 if ( $this->headersOnly ) {
 743                         $this->curlOptions[CURLOPT_NOBODY] = true;
 744                         $this->curlOptions[CURLOPT_HEADER] = true;
 745                 } elseif ( $this->method == 'POST' ) {
 746                         $this->curlOptions[CURLOPT_POST] = true;
 747                         $this->curlOptions[CURLOPT_POSTFIELDS] = $this->postData;
 748                         // Suppress 'Expect: 100-continue' header, as some servers
 749                         // will reject it with a 417 and Curl won't auto retry
 750                         // with HTTP 1.0 fallback
 751                         $this->reqHeaders['Expect'] = '';
 752                 } else {
 753                         $this->curlOptions[CURLOPT_CUSTOMREQUEST] = $this->method;
 754                 }
 755
 756                 $this->curlOptions[CURLOPT_HTTPHEADER] = $this->getHeaderList();
 757
 758                 $curlHandle = curl_init( $this->url );
 759
 760                 if ( !curl_setopt_array( $curlHandle, $this->curlOptions ) ) {
 761                         throw new MWException( "Error setting curl options." );
 762                 }
 763
 764                 if ( $this->followRedirects && $this->canFollowRedirects() ) {
 765                         wfSuppressWarnings();
 766                         if ( !curl_setopt( $curlHandle, CURLOPT_FOLLOWLOCATION, true ) ) {
 767                                 wfDebug( __METHOD__ . ": Couldn't set CURLOPT_FOLLOWLOCATION. " .
 768                                         "Probably safe_mode or open_basedir is set.\n" );
 769                                 // Continue the processing. If it were in curl_setopt_array,
 770                                 // processing would have halted on its entry
 771                         }
 772                         wfRestoreWarnings();
 773                 }
 774
 775                 $curlRes = curl_exec( $curlHandle );
 776                 if ( curl_errno( $curlHandle ) == CURLE_OPERATION_TIMEOUTED ) {
 777                         $this->status->fatal( 'http-timed-out', $this->url );
 778                 } elseif ( $curlRes === false ) {
 779                         $this->status->fatal( 'http-curl-error', curl_error( $curlHandle ) );
 780                 } else {
 781                         $this->headerList = explode( "\r\n", $this->headerText );
 782                 }
 783
 784                 curl_close( $curlHandle );
 785
 786                 $this->parseHeader();
 787                 $this->setStatus();
 788
 789
 790                 return $this->status;
 791         }
 792
 793         /**
 794          * @return bool
 795          */
 796         public function canFollowRedirects() {
 797                 if ( strval( ini_get( 'open_basedir' ) ) !== '' || wfIniGetBool( 'safe_mode' ) ) {
 798                         wfDebug( "Cannot follow redirects in safe mode\n" );
 799                         return false;
 800                 }
 801
 802                 $curlVersionInfo = curl_version();
 803                 if ( $curlVersionInfo['version_number'] < 0x071304 ) {
 804                         wfDebug( "Cannot follow redirects with libcurl < 7.19.4 due to CVE-2009-0037\n" );
 805                         return false;
 806                 }
 807
 808                 return true;
 809         }
 810 }
 811
 812 class PhpHttpRequest extends MWHttpRequest {
 813
 814         /**
 815          * @param string $url
 816          * @return string
 817          */
 818         protected function urlToTcp( $url ) {
 819                 $parsedUrl = parse_url( $url );
 820
 821                 return 'tcp://' . $parsedUrl['host'] . ':' . $parsedUrl['port'];
 822         }
 823
 824         public function execute() {
 825
 826                 parent::execute();
 827
 828                 if ( is_array( $this->postData ) ) {
 829                         $this->postData = wfArrayToCgi( $this->postData );
 830                 }
 831
 832                 if ( $this->parsedUrl['scheme'] != 'http'
 833                         && $this->parsedUrl['scheme'] != 'https' ) {
 834                         $this->status->fatal( 'http-invalid-scheme', $this->parsedUrl['scheme'] );
 835                 }
 836
 837                 $this->reqHeaders['Accept'] = "*/*";
 838                 $this->reqHeaders['Connection'] = 'Close';
 839                 if ( $this->method == 'POST' ) {
 840                         // Required for HTTP 1.0 POSTs
 841                         $this->reqHeaders['Content-Length'] = strlen( $this->postData );
 842                         if ( !isset( $this->reqHeaders['Content-Type'] ) ) {
 843                                 $this->reqHeaders['Content-Type'] = "application/x-www-form-urlencoded";
 844                         }
 845                 }
 846
 847                 // Set up PHP stream context
 848                 $options = array(
 849                         'http' => array(
 850                                 'method' => $this->method,
 851                                 'header' => implode( "\r\n", $this->getHeaderList() ),
 852                                 'protocol_version' => '1.1',
 853                                 'max_redirects' => $this->followRedirects ? $this->maxRedirects : 0,
 854                                 'ignore_errors' => true,
 855                                 'timeout' => $this->timeout,
 856                                 // Curl options in case curlwrappers are installed
 857                                 'curl_verify_ssl_host' => $this->sslVerifyHost ? 2 : 0,
 858                                 'curl_verify_ssl_peer' => $this->sslVerifyCert,
 859                         ),
 860                         'ssl' => array(
 861                                 'verify_peer' => $this->sslVerifyCert,
 862                                 'SNI_enabled' => true,
 863                         ),
 864                 );
 865
 866                 if ( $this->proxy ) {
 867                         $options['http']['proxy'] = $this->urlToTCP( $this->proxy );
 868                         $options['http']['request_fulluri'] = true;
 869                 }
 870
 871                 if ( $this->postData ) {
 872                         $options['http']['content'] = $this->postData;
 873                 }
 874
 875                 if ( $this->sslVerifyHost ) {
 876                         $options['ssl']['CN_match'] = $this->parsedUrl['host'];
 877                 }
 878
 879                 if ( is_dir( $this->caInfo ) ) {
 880                         $options['ssl']['capath'] = $this->caInfo;
 881                 } elseif ( is_file( $this->caInfo ) ) {
 882                         $options['ssl']['cafile'] = $this->caInfo;
 883                 } elseif ( $this->caInfo ) {
 884                         throw new MWException( "Invalid CA info passed: {$this->caInfo}" );
 885                 }
 886
 887                 $context = stream_context_create( $options );
 888
 889                 $this->headerList = array();
 890                 $reqCount = 0;
 891                 $url = $this->url;
 892
 893                 $result = array();
 894
 895                 do {
 896                         $reqCount++;
 897                         wfSuppressWarnings();
 898                         $fh = fopen( $url, "r", false, $context );
 899                         wfRestoreWarnings();
 900
 901                         if ( !$fh ) {
 902                                 break;
 903                         }
 904
 905                         $result = stream_get_meta_data( $fh );
 906                         $this->headerList = $result['wrapper_data'];
 907                         $this->parseHeader();
 908
 909                         if ( !$this->followRedirects ) {
 910                                 break;
 911                         }
 912
 913                         # Handle manual redirection
 914                         if ( !$this->isRedirect() || $reqCount > $this->maxRedirects ) {
 915                                 break;
 916                         }
 917                         # Check security of URL
 918                         $url = $this->getResponseHeader( "Location" );
 919
 920                         if ( !Http::isValidURI( $url ) ) {
 921                                 wfDebug( __METHOD__ . ": insecure redirection\n" );
 922                                 break;
 923                         }
 924                 } while ( true );
 925
 926                 $this->setStatus();
 927
 928                 if ( $fh === false ) {
 929                         $this->status->fatal( 'http-request-error' );
 930                         return $this->status;
 931                 }
 932
 933                 if ( $result['timed_out'] ) {
 934                         $this->status->fatal( 'http-timed-out', $this->url );
 935                         return $this->status;
 936                 }
 937
 938                 // If everything went OK, or we received some error code
 939                 // get the response body content.
 940                 if ( $this->status->isOK() || (int)$this->respStatus >= 300 ) {
 941                         while ( !feof( $fh ) ) {
 942                                 $buf = fread( $fh, 8192 );
 943
 944                                 if ( $buf === false ) {
 945                                         $this->status->fatal( 'http-read-error' );
 946                                         break;
 947                                 }
 948
 949                                 if ( strlen( $buf ) ) {
 950                                         call_user_func( $this->callback, $fh, $buf );
 951                                 }
 952                         }
 953                 }
 954                 fclose( $fh );
 955
 956
 957                 return $this->status;
 958         }
 959 }