includes/HttpFunctions.php

   1 <?php
   2 /**
   3  * @defgroup HTTP HTTP
   4  */
   5
   6 /**
   7  * Various HTTP related functions
   8  * @ingroup HTTP
   9  */
  10 class Http {
  11         static $httpEngine = false;
  12
  13         /**
  14          * Perform an HTTP request
  15          * @param $method string HTTP method. Usually GET/POST
  16          * @param $url string Full URL to act on
  17          * @param $options options to pass to HttpRequest object
  18          *                               Possible keys for the array:
  19          *                                      timeout                   Timeout length in seconds
  20          *                                      postData                  An array of key-value pairs or a url-encoded form data
  21          *                                      proxy                     The proxy to use.      Will use $wgHTTPProxy (if set) otherwise.
  22          *                                      noProxy                   Override $wgHTTPProxy (if set) and don't use any proxy at all.
  23          *                                      sslVerifyHost     (curl only) Verify the SSL certificate
  24          *                                      caInfo                    (curl only) Provide CA information
  25          *                                      maxRedirects      Maximum number of redirects to follow (defaults to 5)
  26          *                                      followRedirects   Whether to follow redirects (defaults to true)
  27          * @returns mixed (bool)false on failure or a string on success
  28          */
  29         public static function request( $method, $url, $options = array() ) {
  30                 $url = wfExpandUrl( $url );
  31                 wfDebug( "HTTP: $method: $url" );
  32                 $options['method'] = strtoupper( $method );
  33                 if ( !isset( $options['timeout'] ) ) {
  34                         $options['timeout'] = 'default';
  35                 }
  36                 $req = HttpRequest::factory( $url, $options );
  37                 $status = $req->execute();
  38                 if ( $status->isOK() ) {
  39                         return $req->getContent();
  40                 } else {
  41                         return false;
  42                 }
  43         }
  44
  45         /**
  46          * Simple wrapper for Http::request( 'GET' )
  47          * @see Http::request()
  48          */
  49         public static function get( $url, $timeout = 'default', $options = array() ) {
  50                 $options['timeout'] = $timeout;
  51                 return Http::request( 'GET', $url, $options );
  52         }
  53
  54         /**
  55          * Simple wrapper for Http::request( 'POST' )
  56          * @see Http::request()
  57          */
  58         public static function post( $url, $options = array() ) {
  59                 return Http::request( 'POST', $url, $options );
  60         }
  61
  62         /**
  63          * Check if the URL can be served by localhost
  64          * @param $url string Full url to check
  65          * @return bool
  66          */
  67         public static function isLocalURL( $url ) {
  68                 global $wgCommandLineMode, $wgConf;
  69                 if ( $wgCommandLineMode ) {
  70                         return false;
  71                 }
  72
  73                 // Extract host part
  74                 $matches = array();
  75                 if ( preg_match( '!^http://([\w.-]+)[/:].*$!', $url, $matches ) ) {
  76                         $host = $matches[1];
  77                         // Split up dotwise
  78                         $domainParts = explode( '.', $host );
  79                         // Check if this domain or any superdomain is listed in $wgConf as a local virtual host
  80                         $domainParts = array_reverse( $domainParts );
  81                         for ( $i = 0; $i < count( $domainParts ); $i++ ) {
  82                                 $domainPart = $domainParts[$i];
  83                                 if ( $i == 0 ) {
  84                                         $domain = $domainPart;
  85                                 } else {
  86                                         $domain = $domainPart . '.' . $domain;
  87                                 }
  88                                 if ( $wgConf->isLocalVHost( $domain ) ) {
  89                                         return true;
  90                                 }
  91                         }
  92                 }
  93                 return false;
  94         }
  95
  96         /**
  97          * A standard user-agent we can use for external requests.
  98          * @returns string
  99          */
 100         public static function userAgent() {
 101                 global $wgVersion;
 102                 return "MediaWiki/$wgVersion";
 103         }
 104
 105         /**
 106          * Checks that the given URI is a valid one
 107          * @param $uri Mixed: URI to check for validity
 108          * @returns bool
 109          */
 110         public static function isValidURI( $uri ) {
 111                 return preg_match(
 112                         '/(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/',
 113                         $uri,
 114                         $matches
 115                 );
 116         }
 117 }
 118
 119 /**
 120  * This wrapper class will call out to curl (if available) or fallback
 121  * to regular PHP if necessary for handling internal HTTP requests.
 122  */
 123 class HttpRequest {
 124         protected $content;
 125         protected $timeout = 'default';
 126         protected $headersOnly = null;
 127         protected $postData = null;
 128         protected $proxy = null;
 129         protected $noProxy = false;
 130         protected $sslVerifyHost = true;
 131         protected $caInfo = null;
 132         protected $method = "GET";
 133         protected $reqHeaders = array();
 134         protected $url;
 135         protected $parsedUrl;
 136         protected $callback;
 137         protected $maxRedirects = 5;
 138         protected $followRedirects = true;
 139
 140         protected $cookieJar;
 141
 142         protected $headerList = array();
 143         protected $respVersion = "0.9";
 144         protected $respStatus = "200 Ok";
 145         protected $respHeaders = array();
 146
 147         public $status;
 148
 149         /**
 150          * @param $url   string url to use
 151          * @param $options array (optional) extra params to pass (see Http::request())
 152          */
 153         function __construct( $url, $options = array() ) {
 154                 global $wgHTTPTimeout;
 155
 156                 $this->url = $url;
 157                 $this->parsedUrl = parse_url( $url );
 158
 159                 if ( !Http::isValidURI( $this->url ) ) {
 160                         $this->status = Status::newFatal('http-invalid-url');
 161                 } else {
 162                         $this->status = Status::newGood( 100 ); // continue
 163                 }
 164
 165                 if ( isset($options['timeout']) && $options['timeout'] != 'default' ) {
 166                         $this->timeout = $options['timeout'];
 167                 } else {
 168                         $this->timeout = $wgHTTPTimeout;
 169                 }
 170
 171                 $members = array( "postData", "proxy", "noProxy", "sslVerifyHost", "caInfo",
 172                                                   "method", "followRedirects", "maxRedirects" );
 173                 foreach ( $members as $o ) {
 174                         if ( isset($options[$o]) ) {
 175                                 $this->$o = $options[$o];
 176                         }
 177                 }
 178         }
 179
 180         /**
 181          * Generate a new request object
 182          * @see HttpRequest::__construct
 183          */
 184         public static function factory( $url, $options = null ) {
 185                 if ( !Http::$httpEngine ) {
 186                         Http::$httpEngine = function_exists( 'curl_init' ) ? 'curl' : 'php';
 187                 } elseif ( Http::$httpEngine == 'curl' && !function_exists( 'curl_init' ) ) {
 188                         throw new MWException( __METHOD__.': curl (http://php.net/curl) is not installed, but'.
 189                                                                    ' Http::$httpEngine is set to "curl"' );
 190                 }
 191
 192                 switch( Http::$httpEngine ) {
 193                 case 'curl':
 194                         return new CurlHttpRequest( $url, $options );
 195                 case 'php':
 196                         if ( !wfIniGetBool( 'allow_url_fopen' ) ) {
 197                                 throw new MWException( __METHOD__.': allow_url_fopen needs to be enabled for pure PHP'.
 198                                         ' http requests to work. If possible, curl should be used instead. See http://php.net/curl.' );
 199                         }
 200                         return new PhpHttpRequest( $url, $options );
 201                 default:
 202                         throw new MWException( __METHOD__.': The setting of Http::$httpEngine is not valid.' );
 203                 }
 204         }
 205
 206         /**
 207          * Get the body, or content, of the response to the request
 208          * @return string
 209          */
 210         public function getContent() {
 211                 return $this->content;
 212         }
 213
 214         /**
 215          * Take care of setting up the proxy
 216          * (override in subclass)
 217          * @return string
 218          */
 219         public function proxySetup() {
 220                 global $wgHTTPProxy;
 221
 222                 if ( $this->proxy ) {
 223                         return;
 224                 }
 225                 if ( Http::isLocalURL( $this->url ) ) {
 226                         $this->proxy = 'http://localhost:80/';
 227                 } elseif ( $wgHTTPProxy ) {
 228                         $this->proxy = $wgHTTPProxy ;
 229                 } elseif ( getenv( "http_proxy" ) ) {
 230                         $this->proxy = getenv( "http_proxy" );
 231                 }
 232         }
 233
 234         /**
 235          * Set the refererer header
 236          */
 237         public function setReferer( $url ) {
 238                 $this->setHeader('Referer', $url);
 239         }
 240
 241         /**
 242          * Set the user agent
 243          */
 244         public function setUserAgent( $UA ) {
 245                 $this->setHeader('User-Agent', $UA);
 246         }
 247
 248         /**
 249          * Set an arbitrary header
 250          */
 251         public function setHeader($name, $value) {
 252                 // I feel like I should normalize the case here...
 253                 $this->reqHeaders[$name] = $value;
 254         }
 255
 256         /**
 257          * Get an array of the headers
 258          */
 259         public function getHeaderList() {
 260                 $list = array();
 261
 262                 if( $this->cookieJar ) {
 263                         $this->reqHeaders['Cookie'] =
 264                                 $this->cookieJar->serializeToHttpRequest($this->parsedUrl['path'],
 265                                                                                                                  $this->parsedUrl['host']);
 266                 }
 267                 foreach($this->reqHeaders as $name => $value) {
 268                         $list[] = "$name: $value";
 269                 }
 270                 return $list;
 271         }
 272
 273         /**
 274          * Set the callback
 275          * @param $callback callback
 276          */
 277         public function setCallback( $callback ) {
 278                 $this->callback = $callback;
 279         }
 280
 281         /**
 282          * A generic callback to read the body of the response from a remote
 283          * server.
 284          * @param $fh handle
 285          * @param $content string
 286          */
 287         public function read( $fh, $content ) {
 288                 $this->content .= $content;
 289                 return strlen( $content );
 290         }
 291
 292         /**
 293          * Take care of whatever is necessary to perform the URI request.
 294          * @return Status
 295          */
 296         public function execute() {
 297                 global $wgTitle;
 298
 299                 if( strtoupper($this->method) == "HEAD" ) {
 300                         $this->headersOnly = true;
 301                 }
 302
 303                 if ( is_array( $this->postData ) ) {
 304                         $this->postData = wfArrayToCGI( $this->postData );
 305                 }
 306
 307                 if ( is_object( $wgTitle ) && !isset($this->reqHeaders['Referer']) ) {
 308                         $this->setReferer( $wgTitle->getFullURL() );
 309                 }
 310
 311                 if ( !$this->noProxy ) {
 312                         $this->proxySetup();
 313                 }
 314
 315                 if ( !$this->callback ) {
 316                         $this->setCallback( array( $this, 'read' ) );
 317                 }
 318
 319                 if ( !isset($this->reqHeaders['User-Agent']) ) {
 320                         $this->setUserAgent(Http::userAgent());
 321                 }
 322         }
 323
 324         /**
 325          * Parses the headers, including the HTTP status code and any
 326          * Set-Cookie headers.  This function expectes the headers to be
 327          * found in an array in the member variable headerList.
 328          * @returns nothing
 329          */
 330         protected function parseHeader() {
 331                 $lastname = "";
 332                 foreach( $this->headerList as $header ) {
 333                         if( preg_match( "#^HTTP/([0-9.]+) (.*)#", $header, $match ) ) {
 334                                 $this->respVersion = $match[1];
 335                                 $this->respStatus = $match[2];
 336                         } elseif( preg_match( "#^[ \t]#", $header ) ) {
 337                                 $last = count($this->respHeaders[$lastname]) - 1;
 338                                 $this->respHeaders[$lastname][$last] .= "\r\n$header";
 339                         } elseif( preg_match( "#^([^:]*):[\t ]*(.*)#", $header, $match ) ) {
 340                                 $this->respHeaders[strtolower( $match[1] )][] = $match[2];
 341                                 $lastname = strtolower( $match[1] );
 342                         }
 343                 }
 344
 345                 $this->parseCookies();
 346         }
 347
 348         /**
 349          * Sets the member variable status to a fatal status if the HTTP
 350          * status code was not 200.
 351          * @returns nothing
 352          */
 353         protected function setStatus() {
 354                 if( !$this->respHeaders ) {
 355                         $this->parseHeader();
 356                 }
 357
 358                 if((int)$this->respStatus !== 200) {
 359                         list( $code, $message ) = explode(" ", $this->respStatus, 2);
 360                         $this->status->fatal("http-bad-status", $code, $message );
 361                 }
 362         }
 363
 364
 365         /**
 366          * Returns true if the last status code was a redirect.
 367          * @return bool
 368          */
 369         public function isRedirect() {
 370                 if( !$this->respHeaders ) {
 371                         $this->parseHeader();
 372                 }
 373
 374                 $status = (int)$this->respStatus;
 375                 if ( $status >= 300 && $status < 400 ) {
 376                         return true;
 377                 }
 378                 return false;
 379         }
 380
 381         /**
 382          * Returns an associative array of response headers after the
 383          * request has been executed.  Because some headers
 384          * (e.g. Set-Cookie) can appear more than once the, each value of
 385          * the associative array is an array of the values given.
 386          * @return array
 387          */
 388         public function getResponseHeaders() {
 389                 if( !$this->respHeaders ) {
 390                         $this->parseHeader();
 391                 }
 392                 return $this->respHeaders;
 393         }
 394
 395         /**
 396          * Returns the value of the given response header.
 397          * @param $header string
 398          * @return string
 399          */
 400         public function getResponseHeader($header) {
 401                 if( !$this->respHeaders ) {
 402                         $this->parseHeader();
 403                 }
 404                 if ( isset( $this->respHeaders[strtolower ( $header ) ] ) ) {
 405                         $v = $this->respHeaders[strtolower ( $header ) ];
 406                         return $v[count( $v ) - 1];
 407                 }
 408                 return null;
 409         }
 410
 411         /**
 412          * Tells the HttpRequest object to use this pre-loaded CookieJar.
 413          * @param $jar CookieJar
 414          */
 415         public function setCookieJar( $jar ) {
 416                 $this->cookieJar = $jar;
 417         }
 418
 419         /**
 420          * Returns the cookie jar in use.
 421          * @returns CookieJar
 422          */
 423         public function getCookieJar() {
 424                 if( !$this->respHeaders ) {
 425                         $this->parseHeader();
 426                 }
 427                 return $this->cookieJar;
 428         }
 429
 430         /**
 431          * Sets a cookie.  Used before a request to set up any individual
 432          * cookies.      Used internally after a request to parse the
 433          * Set-Cookie headers.
 434          * @see Cookie::set
 435          */
 436         public function setCookie( $name, $value = null, $attr = null) {
 437                 if( !$this->cookieJar ) {
 438                         $this->cookieJar = new CookieJar;
 439                 }
 440                 $this->cookieJar->setCookie($name, $value, $attr);
 441         }
 442
 443         /**
 444          * Parse the cookies in the response headers and store them in the cookie jar.
 445          */
 446         protected function parseCookies() {
 447                 if( !$this->cookieJar ) {
 448                         $this->cookieJar = new CookieJar;
 449                 }
 450                 if( isset( $this->respHeaders['set-cookie'] ) ) {
 451                         $url = parse_url( $this->getFinalUrl() );
 452                         foreach( $this->respHeaders['set-cookie'] as $cookie ) {
 453                                 $this->cookieJar->parseCookieResponseHeader( $cookie, $url['host'] );
 454                         }
 455                 }
 456         }
 457
 458         /**
 459          * Returns the final URL after all redirections.
 460          * @returns string
 461          */
 462         public function getFinalUrl() {
 463                 $location = $this->getResponseHeader("Location");
 464                 if ( $location ) {
 465                         return $location;
 466                 }
 467
 468                 return $this->url;
 469         }
 470 }
 471
 472
 473 class Cookie {
 474         protected $name;
 475         protected $value;
 476         protected $expires;
 477         protected $path;
 478         protected $domain;
 479         protected $isSessionKey = true;
 480         // TO IMPLEMENT  protected $secure
 481         // TO IMPLEMENT? protected $maxAge (add onto expires)
 482         // TO IMPLEMENT? protected $version
 483         // TO IMPLEMENT? protected $comment
 484
 485         function __construct( $name, $value, $attr ) {
 486                 $this->name = $name;
 487                 $this->set( $value, $attr );
 488         }
 489
 490         /**
 491          * Sets a cookie.  Used before a request to set up any individual
 492          * cookies.      Used internally after a request to parse the
 493          * Set-Cookie headers.
 494          * @param $name string the name of the cookie
 495          * @param $value string the value of the cookie
 496          * @param $attr array possible key/values:
 497          *              expires  A date string
 498          *              path     The path this cookie is used on
 499          *              domain   Domain this cookie is used on
 500          */
 501         public function set( $value, $attr ) {
 502                 $this->value = $value;
 503                 if( isset( $attr['expires'] ) ) {
 504                         $this->isSessionKey = false;
 505                         $this->expires = strtotime( $attr['expires'] );
 506                 }
 507                 if( isset( $attr['path'] ) ) {
 508                         $this->path = $attr['path'];
 509                 } else {
 510                         $this->path = "/";
 511                 }
 512                 if( isset( $attr['domain'] ) ) {
 513                         if( self::validateCookieDomain( $attr['domain'] ) ) {
 514                                 $this->domain = $attr['domain'];
 515                         }
 516                 } else {
 517                         throw new MWException("You must specify a domain.");
 518                 }
 519         }
 520
 521         /**
 522          * Return the true if the cookie is valid is valid.  Otherwise,
 523          * false.  The uses a method similar to IE cookie security
 524          * described here:
 525          * http://kuza55.blogspot.com/2008/02/understanding-cookie-security.html
 526          * A better method might be to use a blacklist like
 527          * http://publicsuffix.org/
 528          *
 529          * @param $domain string the domain to validate
 530          * @param $originDomain string (optional) the domain the cookie originates from
 531          * @return bool
 532          */
 533         public static function validateCookieDomain( $domain, $originDomain = null) {
 534                 // Don't allow a trailing dot
 535                 if( substr( $domain, -1 ) == "." ) return false;
 536
 537                 $dc = explode(".", $domain);
 538
 539                 // Don't allow cookies for "localhost", "ls" or other dot-less hosts
 540                 if( count($dc) < 2 ) return false;
 541
 542                 // Only allow full, valid IP addresses
 543                 if( preg_match( '/^[0-9.]+$/', $domain ) ) {
 544                         if( count( $dc ) != 4 ) return false;
 545
 546                         if( ip2long( $domain ) === false ) return false;
 547
 548                         if( $originDomain == null || $originDomain == $domain ) return true;
 549
 550                 }
 551
 552                 // Don't allow cookies for "co.uk" or "gov.uk", etc, but allow "supermarket.uk"
 553                 if( strrpos( $domain, "." ) - strlen( $domain )  == -3 ) {
 554                         if( (count($dc) == 2 && strlen( $dc[0] ) <= 2 )
 555                                 || (count($dc) == 3 && strlen( $dc[0] ) == "" && strlen( $dc[1] ) <= 2 ) ) {
 556                                 return false;
 557                         }
 558                         if( (count($dc) == 2 || (count($dc) == 3 && $dc[0] == "") )
 559                                 && preg_match( '/(com|net|org|gov|edu)\...$/', $domain) ) {
 560                                 return false;
 561                         }
 562                 }
 563
 564                 if( $originDomain != null ) {
 565                         if( substr( $domain, 0, 1 ) != "." && $domain != $originDomain ) {
 566                                 return false;
 567                         }
 568                         if( substr( $domain, 0, 1 ) == "."
 569                                 && substr_compare( $originDomain, $domain, -strlen( $domain ),
 570                                                                    strlen( $domain ), TRUE ) != 0 ) {
 571                                 return false;
 572                         }
 573                 }
 574
 575                 return true;
 576         }
 577
 578         /**
 579          * Serialize the cookie jar into a format useful for HTTP Request headers.
 580          * @param $path string the path that will be used. Required.
 581          * @param $domain string the domain that will be used. Required.
 582          * @return string
 583          */
 584         public function serializeToHttpRequest( $path, $domain ) {
 585                 $ret = "";
 586
 587                 if( $this->canServeDomain( $domain )
 588                                 && $this->canServePath( $path )
 589                                 && $this->isUnExpired() ) {
 590                         $ret = $this->name ."=". $this->value;
 591                 }
 592
 593                 return $ret;
 594         }
 595
 596         protected function canServeDomain( $domain ) {
 597                 if( $domain == $this->domain
 598                         || ( strlen( $domain) > strlen( $this->domain )
 599                                  && substr( $this->domain, 0, 1) == "."
 600                                  && substr_compare( $domain, $this->domain, -strlen( $this->domain ),
 601                                                                         strlen( $this->domain ), TRUE ) == 0 ) ) {
 602                         return true;
 603                 }
 604                 return false;
 605         }
 606
 607         protected function canServePath( $path ) {
 608                 if( $this->path && substr_compare( $this->path, $path, 0, strlen( $this->path ) ) == 0 ) {
 609                         return true;
 610                 }
 611                 return false;
 612         }
 613
 614         protected function isUnExpired() {
 615                 if( $this->isSessionKey || $this->expires > time() ) {
 616                         return true;
 617                 }
 618                 return false;
 619         }
 620
 621 }
 622
 623 class CookieJar {
 624         private $cookie = array();
 625
 626         /**
 627          * Set a cookie in the cookie jar.      Make sure only one cookie per-name exists.
 628          * @see Cookie::set()
 629          */
 630         public function setCookie ($name, $value, $attr) {
 631                 /* cookies: case insensitive, so this should work.
 632                  * We'll still send the cookies back in the same case we got them, though.
 633                  */
 634                 $index = strtoupper($name);
 635                 if( isset( $this->cookie[$index] ) ) {
 636                         $this->cookie[$index]->set( $value, $attr );
 637                 } else {
 638                         $this->cookie[$index] = new Cookie( $name, $value, $attr );
 639                 }
 640         }
 641
 642         /**
 643          * @see Cookie::serializeToHttpRequest
 644          */
 645         public function serializeToHttpRequest( $path, $domain ) {
 646                 $cookies = array();
 647
 648                 foreach( $this->cookie as $c ) {
 649                         $serialized = $c->serializeToHttpRequest( $path, $domain );
 650                         if ( $serialized ) $cookies[] = $serialized;
 651                 }
 652
 653                 return implode("; ", $cookies);
 654         }
 655
 656         /**
 657          * Parse the content of an Set-Cookie HTTP Response header.
 658          * @param $cookie string
 659          */
 660         public function parseCookieResponseHeader ( $cookie, $domain ) {
 661                 $len = strlen( "Set-Cookie:" );
 662                 if ( substr_compare( "Set-Cookie:", $cookie, 0, $len, TRUE ) === 0 ) {
 663                         $cookie = substr( $cookie, $len );
 664                 }
 665
 666                 $bit = array_map( 'trim', explode( ";", $cookie ) );
 667                 if ( count($bit) >= 1 ) {
 668                         list($name, $value) = explode( "=", array_shift( $bit ), 2 );
 669                         $attr = array();
 670                         foreach( $bit as $piece ) {
 671                                 $parts = explode( "=", $piece );
 672                                 if( count( $parts ) > 1 ) {
 673                                         $attr[strtolower( $parts[0] )] = $parts[1];
 674                                 } else {
 675                                         $attr[strtolower( $parts[0] )] = true;
 676                                 }
 677                         }
 678
 679                         if( !isset( $attr['domain'] ) ) {
 680                                 $attr['domain'] = $domain;
 681                         } elseif ( !Cookie::validateCookieDomain( $attr['domain'], $domain ) ) {
 682                                 return null;
 683                         }
 684
 685                         $this->setCookie( $name, $value, $attr );
 686                 }
 687         }
 688 }
 689
 690
 691 /**
 692  * HttpRequest implemented using internal curl compiled into PHP
 693  */
 694 class CurlHttpRequest extends HttpRequest {
 695         static $curlMessageMap = array(
 696                 6 => 'http-host-unreachable',
 697                 28 => 'http-timed-out'
 698         );
 699
 700         protected $curlOptions = array();
 701         protected $headerText = "";
 702
 703         protected function readHeader( $fh, $content ) {
 704                 $this->headerText .= $content;
 705                 return strlen( $content );
 706         }
 707
 708         public function execute() {
 709                 parent::execute();
 710                 if ( !$this->status->isOK() ) {
 711                         return $this->status;
 712                 }
 713                 $this->curlOptions[CURLOPT_PROXY] = $this->proxy;
 714                 $this->curlOptions[CURLOPT_TIMEOUT] = $this->timeout;
 715                 $this->curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_0;
 716                 $this->curlOptions[CURLOPT_WRITEFUNCTION] = $this->callback;
 717                 $this->curlOptions[CURLOPT_HEADERFUNCTION] = array($this, "readHeader");
 718                 $this->curlOptions[CURLOPT_FOLLOWLOCATION] = $this->followRedirects;
 719                 $this->curlOptions[CURLOPT_MAXREDIRS] = $this->maxRedirects;
 720
 721                 /* not sure these two are actually necessary */
 722                 if(isset($this->reqHeaders['Referer'])) {
 723                         $this->curlOptions[CURLOPT_REFERER] = $this->reqHeaders['Referer'];
 724                 }
 725                 $this->curlOptions[CURLOPT_USERAGENT] = $this->reqHeaders['User-Agent'];
 726
 727                 if ( $this->sslVerifyHost ) {
 728                         $this->curlOptions[CURLOPT_SSL_VERIFYHOST] = $this->sslVerifyHost;
 729                 }
 730
 731                 if ( $this->caInfo ) {
 732                         $this->curlOptions[CURLOPT_CAINFO] = $this->caInfo;
 733                 }
 734
 735                 if ( $this->headersOnly ) {
 736                         $this->curlOptions[CURLOPT_NOBODY] = true;
 737                         $this->curlOptions[CURLOPT_HEADER] = true;
 738                 } elseif ( $this->method == 'POST' ) {
 739                         $this->curlOptions[CURLOPT_POST] = true;
 740                         $this->curlOptions[CURLOPT_POSTFIELDS] = $this->postData;
 741                         // Suppress 'Expect: 100-continue' header, as some servers
 742                         // will reject it with a 417 and Curl won't auto retry
 743                         // with HTTP 1.0 fallback
 744                         $this->reqHeaders['Expect'] = '';
 745                 } else {
 746                         $this->curlOptions[CURLOPT_CUSTOMREQUEST] = $this->method;
 747                 }
 748
 749                 $this->curlOptions[CURLOPT_HTTPHEADER] = $this->getHeaderList();
 750
 751                 $curlHandle = curl_init( $this->url );
 752                 curl_setopt_array( $curlHandle, $this->curlOptions );
 753
 754                 if ( false === curl_exec( $curlHandle ) ) {
 755                         $code = curl_error( $curlHandle );
 756
 757                         if ( isset( self::$curlMessageMap[$code] ) ) {
 758                                 $this->status->fatal( self::$curlMessageMap[$code] );
 759                         } else {
 760                                 $this->status->fatal( 'http-curl-error', curl_error( $curlHandle ) );
 761                         }
 762                 } else {
 763                         $this->headerList = explode("\r\n", $this->headerText);
 764                 }
 765
 766                 curl_close( $curlHandle );
 767
 768                 $this->parseHeader();
 769                 $this->setStatus();
 770                 return $this->status;
 771         }
 772 }
 773
 774 class PhpHttpRequest extends HttpRequest {
 775         protected $manuallyRedirect = false;
 776
 777         protected function urlToTcp( $url ) {
 778                 $parsedUrl = parse_url( $url );
 779
 780                 return 'tcp://' . $parsedUrl['host'] . ':' . $parsedUrl['port'];
 781         }
 782
 783         public function execute() {
 784                 parent::execute();
 785
 786                 // At least on Centos 4.8 with PHP 5.1.6, using max_redirects to follow redirects
 787                 // causes a segfault
 788                 if ( version_compare( '5.1.7', phpversion(), '>' ) ) {
 789                         $this->manuallyRedirect = true;
 790                 }
 791
 792                 if ( $this->parsedUrl['scheme'] != 'http' ) {
 793                         $this->status->fatal( 'http-invalid-scheme', $this->parsedUrl['scheme'] );
 794                 }
 795
 796                 $this->reqHeaders['Accept'] = "*/*";
 797                 if ( $this->method == 'POST' ) {
 798                         // Required for HTTP 1.0 POSTs
 799                         $this->reqHeaders['Content-Length'] = strlen( $this->postData );
 800                         $this->reqHeaders['Content-type'] = "application/x-www-form-urlencoded";
 801                 }
 802
 803                 $options = array();
 804                 if ( $this->proxy && !$this->noProxy ) {
 805                         $options['proxy'] = $this->urlToTCP( $this->proxy );
 806                         $options['request_fulluri'] = true;
 807                 }
 808
 809                 if ( !$this->followRedirects || $this->manuallyRedirect ) {
 810                         $options['max_redirects'] = 0;
 811                 } else {
 812                         $options['max_redirects'] = $this->maxRedirects;
 813                 }
 814
 815                 $options['method'] = $this->method;
 816                 $options['header'] = implode("\r\n", $this->getHeaderList());
 817                 // Note that at some future point we may want to support
 818                 // HTTP/1.1, but we'd have to write support for chunking
 819                 // in version of PHP < 5.3.1
 820                 $options['protocol_version'] = "1.0";
 821
 822                 // This is how we tell PHP we want to deal with 404s (for example) ourselves.
 823                 // Only works on 5.2.10+
 824                 $options['ignore_errors'] = true;
 825
 826                 if ( $this->postData ) {
 827                         $options['content'] = $this->postData;
 828                 }
 829
 830                 $oldTimeout = false;
 831                 if ( version_compare( '5.2.1', phpversion(), '>' ) ) {
 832                         $oldTimeout = ini_set('default_socket_timeout', $this->timeout);
 833                 } else {
 834                         $options['timeout'] = $this->timeout;
 835                 }
 836
 837                 $context = stream_context_create( array( 'http' => $options ) );
 838
 839                 $this->headerList = array();
 840                 $reqCount = 0;
 841                 $url = $this->url;
 842                 do {
 843                         $again = false;
 844                         $reqCount++;
 845                         wfSuppressWarnings();
 846                         $fh = fopen( $url, "r", false, $context );
 847                         wfRestoreWarnings();
 848                         if ( $fh ) {
 849                                 $result = stream_get_meta_data( $fh );
 850                                 $this->headerList = $result['wrapper_data'];
 851                                 $this->parseHeader();
 852                                 $url = $this->getResponseHeader("Location");
 853                                 $again = $this->manuallyRedirect && $this->followRedirects && $url
 854                                         && $this->isRedirect() && $this->maxRedirects > $reqCount;
 855                         }
 856                 } while ( $again );
 857
 858                 if ( $oldTimeout !== false ) {
 859                         ini_set('default_socket_timeout', $oldTimeout);
 860                 }
 861                 $this->setStatus();
 862
 863                 if ( $fh === false ) {
 864                         $this->status->fatal( 'http-request-error' );
 865                         return $this->status;
 866                 }
 867
 868                 if ( $result['timed_out'] ) {
 869                         $this->status->fatal( 'http-timed-out', $this->url );
 870                         return $this->status;
 871                 }
 872
 873                 if($this->status->isOK()) {
 874                         while ( !feof( $fh ) ) {
 875                                 $buf = fread( $fh, 8192 );
 876                                 if ( $buf === false ) {
 877                                         $this->status->fatal( 'http-read-error' );
 878                                         break;
 879                                 }
 880                                 if ( strlen( $buf ) ) {
 881                                         call_user_func( $this->callback, $fh, $buf );
 882                                 }
 883                         }
 884                 }
 885                 fclose( $fh );
 886
 887                 return $this->status;
 888         }
 889 }