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          * @since 1.25 Second parameter $timeout removed. Second parameter
  86          * is now $options which can be given a 'timeout'
  87          *
  88          * @param string $url
  89          * @param array $options
  90          * @return string
  91          */
  92         public static function get( $url, $options = array() ) {
  93                 $args = func_get_args();
  94                 if ( isset( $args[1] ) && ( is_string( $args[1] ) || is_numeric( $args[1] ) ) ) {
  95                         // Second was used to be the timeout
  96                         // And third parameter used to be $options
  97                         wfWarn( "Second parameter should not be a timeout." );
  98                         $options = isset( $args[2] ) ? $args[2] : array();
  99                         $options['timeout'] = $args[1];
 100                 }
 101                 return Http::request( 'GET', $url, $options );
 102         }
 103
 104         /**
 105          * Simple wrapper for Http::request( 'POST' )
 106          * @see Http::request()
 107          *
 108          * @param string $url
 109          * @param array $options
 110          * @return string
 111          */
 112         public static function post( $url, $options = array() ) {
 113                 return Http::request( 'POST', $url, $options );
 114         }
 115
 116         /**
 117          * Check if the URL can be served by localhost
 118          *
 119          * @param string $url Full url to check
 120          * @return bool
 121          */
 122         public static function isLocalURL( $url ) {
 123                 global $wgCommandLineMode, $wgLocalVirtualHosts, $wgConf;
 124
 125                 if ( $wgCommandLineMode ) {
 126                         return false;
 127                 }
 128
 129                 // Extract host part
 130                 $matches = array();
 131                 if ( preg_match( '!^http://([\w.-]+)[/:].*$!', $url, $matches ) ) {
 132                         $host = $matches[1];
 133                         // Split up dotwise
 134                         $domainParts = explode( '.', $host );
 135                         // Check if this domain or any superdomain is listed as a local virtual host
 136                         $domainParts = array_reverse( $domainParts );
 137
 138                         $domain = '';
 139                         $countParts = count( $domainParts );
 140                         for ( $i = 0; $i < $countParts; $i++ ) {
 141                                 $domainPart = $domainParts[$i];
 142                                 if ( $i == 0 ) {
 143                                         $domain = $domainPart;
 144                                 } else {
 145                                         $domain = $domainPart . '.' . $domain;
 146                                 }
 147
 148                                 if ( in_array( $domain, $wgLocalVirtualHosts )
 149                                         || $wgConf->isLocalVHost( $domain )
 150                                 ) {
 151                                         return true;
 152                                 }
 153                         }
 154                 }
 155
 156                 return false;
 157         }
 158
 159         /**
 160          * A standard user-agent we can use for external requests.
 161          * @return string
 162          */
 163         public static function userAgent() {
 164                 global $wgVersion;
 165                 return "MediaWiki/$wgVersion";
 166         }
 167
 168         /**
 169          * Checks that the given URI is a valid one. Hardcoding the
 170          * protocols, because we only want protocols that both cURL
 171          * and php support.
 172          *
 173          * file:// should not be allowed here for security purpose (r67684)
 174          *
 175          * @todo FIXME this is wildly inaccurate and fails to actually check most stuff
 176          *
 177          * @param string $uri URI to check for validity
 178          * @return bool
 179          */
 180         public static function isValidURI( $uri ) {
 181                 return preg_match(
 182                         '/^https?:\/\/[^\/\s]\S*$/D',
 183                         $uri
 184                 );
 185         }
 186 }
 187
 188 /**
 189  * This wrapper class will call out to curl (if available) or fallback
 190  * to regular PHP if necessary for handling internal HTTP requests.
 191  *
 192  * Renamed from HttpRequest to MWHttpRequest to avoid conflict with
 193  * PHP's HTTP extension.
 194  */
 195 class MWHttpRequest {
 196         const SUPPORTS_FILE_POSTS = false;
 197
 198         protected $content;
 199         protected $timeout = 'default';
 200         protected $headersOnly = null;
 201         protected $postData = null;
 202         protected $proxy = null;
 203         protected $noProxy = false;
 204         protected $sslVerifyHost = true;
 205         protected $sslVerifyCert = true;
 206         protected $caInfo = null;
 207         protected $method = "GET";
 208         protected $reqHeaders = array();
 209         protected $url;
 210         protected $parsedUrl;
 211         protected $callback;
 212         protected $maxRedirects = 5;
 213         protected $followRedirects = false;
 214
 215         /**
 216          * @var CookieJar
 217          */
 218         protected $cookieJar;
 219
 220         protected $headerList = array();
 221         protected $respVersion = "0.9";
 222         protected $respStatus = "200 Ok";
 223         protected $respHeaders = array();
 224
 225         public $status;
 226
 227         /**
 228          * @param string $url Url to use. If protocol-relative, will be expanded to an http:// URL
 229          * @param array $options (optional) extra params to pass (see Http::request())
 230          */
 231         protected function __construct( $url, $options = array() ) {
 232                 global $wgHTTPTimeout, $wgHTTPConnectTimeout;
 233
 234                 $this->url = wfExpandUrl( $url, PROTO_HTTP );
 235                 $this->parsedUrl = wfParseUrl( $this->url );
 236
 237                 if ( !$this->parsedUrl || !Http::isValidURI( $this->url ) ) {
 238                         $this->status = Status::newFatal( 'http-invalid-url' );
 239                 } else {
 240                         $this->status = Status::newGood( 100 ); // continue
 241                 }
 242
 243                 if ( isset( $options['timeout'] ) && $options['timeout'] != 'default' ) {
 244                         $this->timeout = $options['timeout'];
 245                 } else {
 246                         $this->timeout = $wgHTTPTimeout;
 247                 }
 248                 if ( isset( $options['connectTimeout'] ) && $options['connectTimeout'] != 'default' ) {
 249                         $this->connectTimeout = $options['connectTimeout'];
 250                 } else {
 251                         $this->connectTimeout = $wgHTTPConnectTimeout;
 252                 }
 253                 if ( isset( $options['userAgent'] ) ) {
 254                         $this->setUserAgent( $options['userAgent'] );
 255                 }
 256
 257                 $members = array( "postData", "proxy", "noProxy", "sslVerifyHost", "caInfo",
 258                                 "method", "followRedirects", "maxRedirects", "sslVerifyCert", "callback" );
 259
 260                 foreach ( $members as $o ) {
 261                         if ( isset( $options[$o] ) ) {
 262                                 // ensure that MWHttpRequest::method is always
 263                                 // uppercased. Bug 36137
 264                                 if ( $o == 'method' ) {
 265                                         $options[$o] = strtoupper( $options[$o] );
 266                                 }
 267                                 $this->$o = $options[$o];
 268                         }
 269                 }
 270
 271                 if ( $this->noProxy ) {
 272                         $this->proxy = ''; // noProxy takes precedence
 273                 }
 274         }
 275
 276         /**
 277          * Simple function to test if we can make any sort of requests at all, using
 278          * cURL or fopen()
 279          * @return bool
 280          */
 281         public static function canMakeRequests() {
 282                 return function_exists( 'curl_init' ) || wfIniGetBool( 'allow_url_fopen' );
 283         }
 284
 285         /**
 286          * Generate a new request object
 287          * @param string $url Url to use
 288          * @param array $options (optional) extra params to pass (see Http::request())
 289          * @throws MWException
 290          * @return CurlHttpRequest|PhpHttpRequest
 291          * @see MWHttpRequest::__construct
 292          */
 293         public static function factory( $url, $options = null ) {
 294                 if ( !Http::$httpEngine ) {
 295                         Http::$httpEngine = function_exists( 'curl_init' ) ? 'curl' : 'php';
 296                 } elseif ( Http::$httpEngine == 'curl' && !function_exists( 'curl_init' ) ) {
 297                         throw new MWException( __METHOD__ . ': curl (http://php.net/curl) is not installed, but' .
 298                                 ' Http::$httpEngine is set to "curl"' );
 299                 }
 300
 301                 switch ( Http::$httpEngine ) {
 302                         case 'curl':
 303                                 return new CurlHttpRequest( $url, $options );
 304                         case 'php':
 305                                 if ( !wfIniGetBool( 'allow_url_fopen' ) ) {
 306                                         throw new MWException( __METHOD__ . ': allow_url_fopen ' .
 307                                                 'needs to be enabled for pure PHP http requests to ' .
 308                                                 'work. If possible, curl should be used instead. See ' .
 309                                                 'http://php.net/curl.'
 310                                         );
 311                                 }
 312                                 return new PhpHttpRequest( $url, $options );
 313                         default:
 314                                 throw new MWException( __METHOD__ . ': The setting of Http::$httpEngine is not valid.' );
 315                 }
 316         }
 317
 318         /**
 319          * Get the body, or content, of the response to the request
 320          *
 321          * @return string
 322          */
 323         public function getContent() {
 324                 return $this->content;
 325         }
 326
 327         /**
 328          * Set the parameters of the request
 329          *
 330          * @param array $args
 331          * @todo overload the args param
 332          */
 333         public function setData( $args ) {
 334                 $this->postData = $args;
 335         }
 336
 337         /**
 338          * Take care of setting up the proxy (do nothing if "noProxy" is set)
 339          *
 340          * @return void
 341          */
 342         public function proxySetup() {
 343                 global $wgHTTPProxy;
 344
 345                 // If there is an explicit proxy set and proxies are not disabled, then use it
 346                 if ( $this->proxy && !$this->noProxy ) {
 347                         return;
 348                 }
 349
 350                 // Otherwise, fallback to $wgHTTPProxy/http_proxy (when set) if this is not a machine
 351                 // local URL and proxies are not disabled
 352                 if ( Http::isLocalURL( $this->url ) || $this->noProxy ) {
 353                         $this->proxy = '';
 354                 } elseif ( $wgHTTPProxy ) {
 355                         $this->proxy = $wgHTTPProxy;
 356                 } elseif ( getenv( "http_proxy" ) ) {
 357                         $this->proxy = getenv( "http_proxy" );
 358                 }
 359         }
 360
 361         /**
 362          * Set the user agent
 363          * @param string $UA
 364          */
 365         public function setUserAgent( $UA ) {
 366                 $this->setHeader( 'User-Agent', $UA );
 367         }
 368
 369         /**
 370          * Set an arbitrary header
 371          * @param string $name
 372          * @param string $value
 373          */
 374         public function setHeader( $name, $value ) {
 375                 // I feel like I should normalize the case here...
 376                 $this->reqHeaders[$name] = $value;
 377         }
 378
 379         /**
 380          * Get an array of the headers
 381          * @return array
 382          */
 383         public function getHeaderList() {
 384                 $list = array();
 385
 386                 if ( $this->cookieJar ) {
 387                         $this->reqHeaders['Cookie'] =
 388                                 $this->cookieJar->serializeToHttpRequest(
 389                                         $this->parsedUrl['path'],
 390                                         $this->parsedUrl['host']
 391                                 );
 392                 }
 393
 394                 foreach ( $this->reqHeaders as $name => $value ) {
 395                         $list[] = "$name: $value";
 396                 }
 397
 398                 return $list;
 399         }
 400
 401         /**
 402          * Set a read callback to accept data read from the HTTP request.
 403          * By default, data is appended to an internal buffer which can be
 404          * retrieved through $req->getContent().
 405          *
 406          * To handle data as it comes in -- especially for large files that
 407          * would not fit in memory -- you can instead set your own callback,
 408          * in the form function($resource, $buffer) where the first parameter
 409          * is the low-level resource being read (implementation specific),
 410          * and the second parameter is the data buffer.
 411          *
 412          * You MUST return the number of bytes handled in the buffer; if fewer
 413          * bytes are reported handled than were passed to you, the HTTP fetch
 414          * will be aborted.
 415          *
 416          * @param callable $callback
 417          * @throws MWException
 418          */
 419         public function setCallback( $callback ) {
 420                 if ( !is_callable( $callback ) ) {
 421                         throw new MWException( 'Invalid MwHttpRequest callback' );
 422                 }
 423                 $this->callback = $callback;
 424         }
 425
 426         /**
 427          * A generic callback to read the body of the response from a remote
 428          * server.
 429          *
 430          * @param resource $fh
 431          * @param string $content
 432          * @return int
 433          */
 434         public function read( $fh, $content ) {
 435                 $this->content .= $content;
 436                 return strlen( $content );
 437         }
 438
 439         /**
 440          * Take care of whatever is necessary to perform the URI request.
 441          *
 442          * @return Status
 443          */
 444         public function execute() {
 445
 446                 $this->content = "";
 447
 448                 if ( strtoupper( $this->method ) == "HEAD" ) {
 449                         $this->headersOnly = true;
 450                 }
 451
 452                 $this->proxySetup(); // set up any proxy as needed
 453
 454                 if ( !$this->callback ) {
 455                         $this->setCallback( array( $this, 'read' ) );
 456                 }
 457
 458                 if ( !isset( $this->reqHeaders['User-Agent'] ) ) {
 459                         $this->setUserAgent( Http::userAgent() );
 460                 }
 461
 462         }
 463
 464         /**
 465          * Parses the headers, including the HTTP status code and any
 466          * Set-Cookie headers.  This function expects the headers to be
 467          * found in an array in the member variable headerList.
 468          */
 469         protected function parseHeader() {
 470
 471                 $lastname = "";
 472
 473                 foreach ( $this->headerList as $header ) {
 474                         if ( preg_match( "#^HTTP/([0-9.]+) (.*)#", $header, $match ) ) {
 475                                 $this->respVersion = $match[1];
 476                                 $this->respStatus = $match[2];
 477                         } elseif ( preg_match( "#^[ \t]#", $header ) ) {
 478                                 $last = count( $this->respHeaders[$lastname] ) - 1;
 479                                 $this->respHeaders[$lastname][$last] .= "\r\n$header";
 480                         } elseif ( preg_match( "#^([^:]*):[\t ]*(.*)#", $header, $match ) ) {
 481                                 $this->respHeaders[strtolower( $match[1] )][] = $match[2];
 482                                 $lastname = strtolower( $match[1] );
 483                         }
 484                 }
 485
 486                 $this->parseCookies();
 487
 488         }
 489
 490         /**
 491          * Sets HTTPRequest status member to a fatal value with the error
 492          * message if the returned integer value of the status code was
 493          * not successful (< 300) or a redirect (>=300 and < 400).  (see
 494          * RFC2616, section 10,
 495          * http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html for a
 496          * list of status codes.)
 497          */
 498         protected function setStatus() {
 499                 if ( !$this->respHeaders ) {
 500                         $this->parseHeader();
 501                 }
 502
 503                 if ( (int)$this->respStatus > 399 ) {
 504                         list( $code, $message ) = explode( " ", $this->respStatus, 2 );
 505                         $this->status->fatal( "http-bad-status", $code, $message );
 506                 }
 507         }
 508
 509         /**
 510          * Get the integer value of the HTTP status code (e.g. 200 for "200 Ok")
 511          * (see RFC2616, section 10, http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
 512          * for a list of status codes.)
 513          *
 514          * @return int
 515          */
 516         public function getStatus() {
 517                 if ( !$this->respHeaders ) {
 518                         $this->parseHeader();
 519                 }
 520
 521                 return (int)$this->respStatus;
 522         }
 523
 524         /**
 525          * Returns true if the last status code was a redirect.
 526          *
 527          * @return bool
 528          */
 529         public function isRedirect() {
 530                 if ( !$this->respHeaders ) {
 531                         $this->parseHeader();
 532                 }
 533
 534                 $status = (int)$this->respStatus;
 535
 536                 if ( $status >= 300 && $status <= 303 ) {
 537                         return true;
 538                 }
 539
 540                 return false;
 541         }
 542
 543         /**
 544          * Returns an associative array of response headers after the
 545          * request has been executed.  Because some headers
 546          * (e.g. Set-Cookie) can appear more than once the, each value of
 547          * the associative array is an array of the values given.
 548          *
 549          * @return array
 550          */
 551         public function getResponseHeaders() {
 552                 if ( !$this->respHeaders ) {
 553                         $this->parseHeader();
 554                 }
 555
 556                 return $this->respHeaders;
 557         }
 558
 559         /**
 560          * Returns the value of the given response header.
 561          *
 562          * @param string $header
 563          * @return string
 564          */
 565         public function getResponseHeader( $header ) {
 566                 if ( !$this->respHeaders ) {
 567                         $this->parseHeader();
 568                 }
 569
 570                 if ( isset( $this->respHeaders[strtolower( $header )] ) ) {
 571                         $v = $this->respHeaders[strtolower( $header )];
 572                         return $v[count( $v ) - 1];
 573                 }
 574
 575                 return null;
 576         }
 577
 578         /**
 579          * Tells the MWHttpRequest object to use this pre-loaded CookieJar.
 580          *
 581          * @param CookieJar $jar
 582          */
 583         public function setCookieJar( $jar ) {
 584                 $this->cookieJar = $jar;
 585         }
 586
 587         /**
 588          * Returns the cookie jar in use.
 589          *
 590          * @return CookieJar
 591          */
 592         public function getCookieJar() {
 593                 if ( !$this->respHeaders ) {
 594                         $this->parseHeader();
 595                 }
 596
 597                 return $this->cookieJar;
 598         }
 599
 600         /**
 601          * Sets a cookie. Used before a request to set up any individual
 602          * cookies. Used internally after a request to parse the
 603          * Set-Cookie headers.
 604          * @see Cookie::set
 605          * @param string $name
 606          * @param mixed $value
 607          * @param array $attr
 608          */
 609         public function setCookie( $name, $value = null, $attr = null ) {
 610                 if ( !$this->cookieJar ) {
 611                         $this->cookieJar = new CookieJar;
 612                 }
 613
 614                 $this->cookieJar->setCookie( $name, $value, $attr );
 615         }
 616
 617         /**
 618          * Parse the cookies in the response headers and store them in the cookie jar.
 619          */
 620         protected function parseCookies() {
 621
 622                 if ( !$this->cookieJar ) {
 623                         $this->cookieJar = new CookieJar;
 624                 }
 625
 626                 if ( isset( $this->respHeaders['set-cookie'] ) ) {
 627                         $url = parse_url( $this->getFinalUrl() );
 628                         foreach ( $this->respHeaders['set-cookie'] as $cookie ) {
 629                                 $this->cookieJar->parseCookieResponseHeader( $cookie, $url['host'] );
 630                         }
 631                 }
 632
 633         }
 634
 635         /**
 636          * Returns the final URL after all redirections.
 637          *
 638          * Relative values of the "Location" header are incorrect as
 639          * stated in RFC, however they do happen and modern browsers
 640          * support them.  This function loops backwards through all
 641          * locations in order to build the proper absolute URI - Marooned
 642          * at wikia-inc.com
 643          *
 644          * Note that the multiple Location: headers are an artifact of
 645          * CURL -- they shouldn't actually get returned this way. Rewrite
 646          * this when bug 29232 is taken care of (high-level redirect
 647          * handling rewrite).
 648          *
 649          * @return string
 650          */
 651         public function getFinalUrl() {
 652                 $headers = $this->getResponseHeaders();
 653
 654                 //return full url (fix for incorrect but handled relative location)
 655                 if ( isset( $headers['location'] ) ) {
 656                         $locations = $headers['location'];
 657                         $domain = '';
 658                         $foundRelativeURI = false;
 659                         $countLocations = count( $locations );
 660
 661                         for ( $i = $countLocations - 1; $i >= 0; $i-- ) {
 662                                 $url = parse_url( $locations[$i] );
 663
 664                                 if ( isset( $url['host'] ) ) {
 665                                         $domain = $url['scheme'] . '://' . $url['host'];
 666                                         break; //found correct URI (with host)
 667                                 } else {
 668                                         $foundRelativeURI = true;
 669                                 }
 670                         }
 671
 672                         if ( $foundRelativeURI ) {
 673                                 if ( $domain ) {
 674                                         return $domain . $locations[$countLocations - 1];
 675                                 } else {
 676                                         $url = parse_url( $this->url );
 677                                         if ( isset( $url['host'] ) ) {
 678                                                 return $url['scheme'] . '://' . $url['host'] .
 679                                                         $locations[$countLocations - 1];
 680                                         }
 681                                 }
 682                         } else {
 683                                 return $locations[$countLocations - 1];
 684                         }
 685                 }
 686
 687                 return $this->url;
 688         }
 689
 690         /**
 691          * Returns true if the backend can follow redirects. Overridden by the
 692          * child classes.
 693          * @return bool
 694          */
 695         public function canFollowRedirects() {
 696                 return true;
 697         }
 698 }
 699
 700 /**
 701  * MWHttpRequest implemented using internal curl compiled into PHP
 702  */
 703 class CurlHttpRequest extends MWHttpRequest {
 704         const SUPPORTS_FILE_POSTS = true;
 705
 706         protected $curlOptions = array();
 707         protected $headerText = "";
 708
 709         /**
 710          * @param resource $fh
 711          * @param string $content
 712          * @return int
 713          */
 714         protected function readHeader( $fh, $content ) {
 715                 $this->headerText .= $content;
 716                 return strlen( $content );
 717         }
 718
 719         public function execute() {
 720
 721                 parent::execute();
 722
 723                 if ( !$this->status->isOK() ) {
 724                         return $this->status;
 725                 }
 726
 727                 $this->curlOptions[CURLOPT_PROXY] = $this->proxy;
 728                 $this->curlOptions[CURLOPT_TIMEOUT] = $this->timeout;
 729
 730                 // Only supported in curl >= 7.16.2
 731                 if ( defined( 'CURLOPT_CONNECTTIMEOUT_MS' ) ) {
 732                         $this->curlOptions[CURLOPT_CONNECTTIMEOUT_MS] = $this->connectTimeout * 1000;
 733                 }
 734
 735                 $this->curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_0;
 736                 $this->curlOptions[CURLOPT_WRITEFUNCTION] = $this->callback;
 737                 $this->curlOptions[CURLOPT_HEADERFUNCTION] = array( $this, "readHeader" );
 738                 $this->curlOptions[CURLOPT_MAXREDIRS] = $this->maxRedirects;
 739                 $this->curlOptions[CURLOPT_ENCODING] = ""; # Enable compression
 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                         throw new MWException( "Error setting curl options." );
 770                 }
 771
 772                 if ( $this->followRedirects && $this->canFollowRedirects() ) {
 773                         wfSuppressWarnings();
 774                         if ( !curl_setopt( $curlHandle, CURLOPT_FOLLOWLOCATION, true ) ) {
 775                                 wfDebug( __METHOD__ . ": Couldn't set CURLOPT_FOLLOWLOCATION. " .
 776                                         "Probably safe_mode or open_basedir is set.\n" );
 777                                 // Continue the processing. If it were in curl_setopt_array,
 778                                 // processing would have halted on its entry
 779                         }
 780                         wfRestoreWarnings();
 781                 }
 782
 783                 $curlRes = curl_exec( $curlHandle );
 784                 if ( curl_errno( $curlHandle ) == CURLE_OPERATION_TIMEOUTED ) {
 785                         $this->status->fatal( 'http-timed-out', $this->url );
 786                 } elseif ( $curlRes === false ) {
 787                         $this->status->fatal( 'http-curl-error', curl_error( $curlHandle ) );
 788                 } else {
 789                         $this->headerList = explode( "\r\n", $this->headerText );
 790                 }
 791
 792                 curl_close( $curlHandle );
 793
 794                 $this->parseHeader();
 795                 $this->setStatus();
 796
 797                 return $this->status;
 798         }
 799
 800         /**
 801          * @return bool
 802          */
 803         public function canFollowRedirects() {
 804                 if ( strval( ini_get( 'open_basedir' ) ) !== '' || wfIniGetBool( 'safe_mode' ) ) {
 805                         wfDebug( "Cannot follow redirects in safe mode\n" );
 806                         return false;
 807                 }
 808
 809                 $curlVersionInfo = curl_version();
 810                 if ( $curlVersionInfo['version_number'] < 0x071304 ) {
 811                         wfDebug( "Cannot follow redirects with libcurl < 7.19.4 due to CVE-2009-0037\n" );
 812                         return false;
 813                 }
 814
 815                 return true;
 816         }
 817 }
 818
 819 class PhpHttpRequest extends MWHttpRequest {
 820
 821         /**
 822          * @param string $url
 823          * @return string
 824          */
 825         protected function urlToTcp( $url ) {
 826                 $parsedUrl = parse_url( $url );
 827
 828                 return 'tcp://' . $parsedUrl['host'] . ':' . $parsedUrl['port'];
 829         }
 830
 831         public function execute() {
 832
 833                 parent::execute();
 834
 835                 if ( is_array( $this->postData ) ) {
 836                         $this->postData = wfArrayToCgi( $this->postData );
 837                 }
 838
 839                 if ( $this->parsedUrl['scheme'] != 'http'
 840                         && $this->parsedUrl['scheme'] != 'https' ) {
 841                         $this->status->fatal( 'http-invalid-scheme', $this->parsedUrl['scheme'] );
 842                 }
 843
 844                 $this->reqHeaders['Accept'] = "*/*";
 845                 $this->reqHeaders['Connection'] = 'Close';
 846                 if ( $this->method == 'POST' ) {
 847                         // Required for HTTP 1.0 POSTs
 848                         $this->reqHeaders['Content-Length'] = strlen( $this->postData );
 849                         if ( !isset( $this->reqHeaders['Content-Type'] ) ) {
 850                                 $this->reqHeaders['Content-Type'] = "application/x-www-form-urlencoded";
 851                         }
 852                 }
 853
 854                 // Set up PHP stream context
 855                 $options = array(
 856                         'http' => array(
 857                                 'method' => $this->method,
 858                                 'header' => implode( "\r\n", $this->getHeaderList() ),
 859                                 'protocol_version' => '1.1',
 860                                 'max_redirects' => $this->followRedirects ? $this->maxRedirects : 0,
 861                                 'ignore_errors' => true,
 862                                 'timeout' => $this->timeout,
 863                                 // Curl options in case curlwrappers are installed
 864                                 'curl_verify_ssl_host' => $this->sslVerifyHost ? 2 : 0,
 865                                 'curl_verify_ssl_peer' => $this->sslVerifyCert,
 866                         ),
 867                         'ssl' => array(
 868                                 'verify_peer' => $this->sslVerifyCert,
 869                                 'SNI_enabled' => true,
 870                         ),
 871                 );
 872
 873                 if ( $this->proxy ) {
 874                         $options['http']['proxy'] = $this->urlToTCP( $this->proxy );
 875                         $options['http']['request_fulluri'] = true;
 876                 }
 877
 878                 if ( $this->postData ) {
 879                         $options['http']['content'] = $this->postData;
 880                 }
 881
 882                 if ( $this->sslVerifyHost ) {
 883                         $options['ssl']['CN_match'] = $this->parsedUrl['host'];
 884                 }
 885
 886                 if ( is_dir( $this->caInfo ) ) {
 887                         $options['ssl']['capath'] = $this->caInfo;
 888                 } elseif ( is_file( $this->caInfo ) ) {
 889                         $options['ssl']['cafile'] = $this->caInfo;
 890                 } elseif ( $this->caInfo ) {
 891                         throw new MWException( "Invalid CA info passed: {$this->caInfo}" );
 892                 }
 893
 894                 $context = stream_context_create( $options );
 895
 896                 $this->headerList = array();
 897                 $reqCount = 0;
 898                 $url = $this->url;
 899
 900                 $result = array();
 901
 902                 do {
 903                         $reqCount++;
 904                         wfSuppressWarnings();
 905                         $fh = fopen( $url, "r", false, $context );
 906                         wfRestoreWarnings();
 907
 908                         if ( !$fh ) {
 909                                 break;
 910                         }
 911
 912                         $result = stream_get_meta_data( $fh );
 913                         $this->headerList = $result['wrapper_data'];
 914                         $this->parseHeader();
 915
 916                         if ( !$this->followRedirects ) {
 917                                 break;
 918                         }
 919
 920                         # Handle manual redirection
 921                         if ( !$this->isRedirect() || $reqCount > $this->maxRedirects ) {
 922                                 break;
 923                         }
 924                         # Check security of URL
 925                         $url = $this->getResponseHeader( "Location" );
 926
 927                         if ( !Http::isValidURI( $url ) ) {
 928                                 wfDebug( __METHOD__ . ": insecure redirection\n" );
 929                                 break;
 930                         }
 931                 } while ( true );
 932
 933                 $this->setStatus();
 934
 935                 if ( $fh === false ) {
 936                         $this->status->fatal( 'http-request-error' );
 937                         return $this->status;
 938                 }
 939
 940                 if ( $result['timed_out'] ) {
 941                         $this->status->fatal( 'http-timed-out', $this->url );
 942                         return $this->status;
 943                 }
 944
 945                 // If everything went OK, or we received some error code
 946                 // get the response body content.
 947                 if ( $this->status->isOK() || (int)$this->respStatus >= 300 ) {
 948                         while ( !feof( $fh ) ) {
 949                                 $buf = fread( $fh, 8192 );
 950
 951                                 if ( $buf === false ) {
 952                                         $this->status->fatal( 'http-read-error' );
 953                                         break;
 954                                 }
 955
 956                                 if ( strlen( $buf ) ) {
 957                                         call_user_func( $this->callback, $fh, $buf );
 958                                 }
 959                         }
 960                 }
 961                 fclose( $fh );
 962
 963                 return $this->status;
 964         }
 965 }