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