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.
  22          *                                              Will use $wgHTTPProxy (if set) otherwise.
  23          *              noProxy                         Override $wgHTTPProxy (if set) and don't use any proxy at all.
  24          *              sslVerifyHost   (curl only)     Verify hostname against certificate
  25          *              sslVerifyCert   (curl only)     Verify SSL certificate
  26          *              caInfo          (curl only)     Provide CA information
  27          *              maxRedirects                    Maximum number of redirects to follow (defaults to 5)
  28          *              followRedirects   Whether to follow redirects (defaults to true)
  29          * @returns mixed (bool)false on failure or a string on success
  30          */
  31         public static function request( $method, $url, $options = array() ) {
  32                 $url = wfExpandUrl( $url );
  33                 wfDebug( "HTTP: $method: $url" );
  34                 $options['method'] = strtoupper( $method );
  35                 if ( !isset( $options['timeout'] ) ) {
  36                         $options['timeout'] = 'default';
  37                 }
  38                 $req = HttpRequest::factory( $url, $options );
  39                 $status = $req->execute();
  40                 if ( $status->isOK() ) {
  41                         return $req->getContent();
  42                 } else {
  43                         return false;
  44                 }
  45         }
  46
  47         /**
  48          * Simple wrapper for Http::request( 'GET' )
  49          * @see Http::request()
  50          */
  51         public static function get( $url, $timeout = 'default', $options = array() ) {
  52                 $options['timeout'] = $timeout;
  53                 return Http::request( 'GET', $url, $options );
  54         }
  55
  56         /**
  57          * Simple wrapper for Http::request( 'POST' )
  58          * @see Http::request()
  59          */
  60         public static function post( $url, $options = array() ) {
  61                 return Http::request( 'POST', $url, $options );
  62         }
  63
  64         /**
  65          * Check if the URL can be served by localhost
  66          * @param $url string Full url to check
  67          * @return bool
  68          */
  69         public static function isLocalURL( $url ) {
  70                 global $wgCommandLineMode, $wgConf;
  71                 if ( $wgCommandLineMode ) {
  72                         return false;
  73                 }
  74
  75                 // Extract host part
  76                 $matches = array();
  77                 if ( preg_match( '!^http://([\w.-]+)[/:].*$!', $url, $matches ) ) {
  78                         $host = $matches[1];
  79                         // Split up dotwise
  80                         $domainParts = explode( '.', $host );
  81                         // Check if this domain or any superdomain is listed in $wgConf as a local virtual host
  82                         $domainParts = array_reverse( $domainParts );
  83                         for ( $i = 0; $i < count( $domainParts ); $i++ ) {
  84                                 $domainPart = $domainParts[$i];
  85                                 if ( $i == 0 ) {
  86                                         $domain = $domainPart;
  87                                 } else {
  88                                         $domain = $domainPart . '.' . $domain;
  89                                 }
  90                                 if ( $wgConf->isLocalVHost( $domain ) ) {
  91                                         return true;
  92                                 }
  93                         }
  94                 }
  95                 return false;
  96         }
  97
  98         /**
  99          * A standard user-agent we can use for external requests.
 100          * @returns string
 101          */
 102         public static function userAgent() {
 103                 global $wgVersion;
 104                 return "MediaWiki/$wgVersion";
 105         }
 106
 107         /**
 108          * Checks that the given URI is a valid one
 109          * @param $uri Mixed: URI to check for validity
 110          * @returns bool
 111          */
 112         public static function isValidURI( $uri ) {
 113                 return preg_match(
 114                         '/(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/',
 115                         $uri,
 116                         $matches
 117                 );
 118         }
 119 }
 120
 121 /**
 122  * This wrapper class will call out to curl (if available) or fallback
 123  * to regular PHP if necessary for handling internal HTTP requests.
 124  */
 125 class HttpRequest {
 126         protected $content;
 127         protected $timeout = 'default';
 128         protected $headersOnly = null;
 129         protected $postData = null;
 130         protected $proxy = null;
 131         protected $noProxy = false;
 132         protected $sslVerifyHost = true;
 133         protected $sslVerifyCert = true;
 134         protected $caInfo = null;
 135         protected $method = "GET";
 136         protected $reqHeaders = array();
 137         protected $url;
 138         protected $parsedUrl;
 139         protected $callback;
 140         protected $maxRedirects = 5;
 141         protected $followRedirects = true;
 142
 143         protected $cookieJar;
 144
 145         protected $headerList = array();
 146         protected $respVersion = "0.9";
 147         protected $respStatus = "200 Ok";
 148         protected $respHeaders = array();
 149
 150         public $status;
 151
 152         /**
 153          * @param $url   string url to use
 154          * @param $options array (optional) extra params to pass (see Http::request())
 155          */
 156         function __construct( $url, $options = array() ) {
 157                 global $wgHTTPTimeout;
 158
 159                 $this->url = $url;
 160                 $this->parsedUrl = parse_url( $url );
 161
 162                 if ( !Http::isValidURI( $this->url ) ) {
 163                         $this->status = Status::newFatal('http-invalid-url');
 164                 } else {
 165                         $this->status = Status::newGood( 100 ); // continue
 166                 }
 167
 168                 if ( isset($options['timeout']) && $options['timeout'] != 'default' ) {
 169                         $this->timeout = $options['timeout'];
 170                 } else {
 171                         $this->timeout = $wgHTTPTimeout;
 172                 }
 173
 174                 $members = array( "postData", "proxy", "noProxy", "sslVerifyHost", "caInfo",
 175                                   "method", "followRedirects", "maxRedirects", "sslVerifyCert" );
 176                 foreach ( $members as $o ) {
 177                         if ( isset($options[$o]) ) {
 178                                 $this->$o = $options[$o];
 179                         }
 180                 }
 181         }
 182
 183         /**
 184          * Generate a new request object
 185          * @see HttpRequest::__construct
 186          */
 187         public static function factory( $url, $options = null ) {
 188                 if ( !Http::$httpEngine ) {
 189                         Http::$httpEngine = function_exists( 'curl_init' ) ? 'curl' : 'php';
 190                 } elseif ( Http::$httpEngine == 'curl' && !function_exists( 'curl_init' ) ) {
 191                         throw new MWException( __METHOD__.': curl (http://php.net/curl) is not installed, but'.
 192                                                                    ' Http::$httpEngine is set to "curl"' );
 193                 }
 194
 195                 switch( Http::$httpEngine ) {
 196                 case 'curl':
 197                         return new CurlHttpRequest( $url, $options );
 198                 case 'php':
 199                         if ( !wfIniGetBool( 'allow_url_fopen' ) ) {
 200                                 throw new MWException( __METHOD__.': allow_url_fopen needs to be enabled for pure PHP'.
 201                                         ' http requests to work. If possible, curl should be used instead. See http://php.net/curl.' );
 202                         }
 203                         return new PhpHttpRequest( $url, $options );
 204                 default:
 205                         throw new MWException( __METHOD__.': The setting of Http::$httpEngine is not valid.' );
 206                 }
 207         }
 208
 209         /**
 210          * Get the body, or content, of the response to the request
 211          * @return string
 212          */
 213         public function getContent() {
 214                 return $this->content;
 215         }
 216
 217         /**
 218          * Set the parameters of the request
 219          * @param $params array
 220          * @todo overload the args param
 221          */
 222         public function setData($args) {
 223                 $this->postData = $args;
 224         }
 225
 226         /**
 227          * Take care of setting up the proxy
 228          * (override in subclass)
 229          * @return string
 230          */
 231         public function proxySetup() {
 232                 global $wgHTTPProxy;
 233
 234                 if ( $this->proxy ) {
 235                         return;
 236                 }
 237                 if ( Http::isLocalURL( $this->url ) ) {
 238                         $this->proxy = 'http://localhost:80/';
 239                 } elseif ( $wgHTTPProxy ) {
 240                         $this->proxy = $wgHTTPProxy ;
 241                 } elseif ( getenv( "http_proxy" ) ) {
 242                         $this->proxy = getenv( "http_proxy" );
 243                 }
 244         }
 245
 246         /**
 247          * Set the refererer header
 248          */
 249         public function setReferer( $url ) {
 250                 $this->setHeader('Referer', $url);
 251         }
 252
 253         /**
 254          * Set the user agent
 255          */
 256         public function setUserAgent( $UA ) {
 257                 $this->setHeader('User-Agent', $UA);
 258         }
 259
 260         /**
 261          * Set an arbitrary header
 262          */
 263         public function setHeader($name, $value) {
 264                 // I feel like I should normalize the case here...
 265                 $this->reqHeaders[$name] = $value;
 266         }
 267
 268         /**
 269          * Get an array of the headers
 270          */
 271         public function getHeaderList() {
 272                 $list = array();
 273
 274                 if( $this->cookieJar ) {
 275                         $this->reqHeaders['Cookie'] =
 276                                 $this->cookieJar->serializeToHttpRequest($this->parsedUrl['path'],
 277                                                                                                                  $this->parsedUrl['host']);
 278                 }
 279                 foreach($this->reqHeaders as $name => $value) {
 280                         $list[] = "$name: $value";
 281                 }
 282                 return $list;
 283         }
 284
 285         /**
 286          * Set the callback
 287          * @param $callback callback
 288          */
 289         public function setCallback( $callback ) {
 290                 $this->callback = $callback;
 291         }
 292
 293         /**
 294          * A generic callback to read the body of the response from a remote
 295          * server.
 296          * @param $fh handle
 297          * @param $content string
 298          */
 299         public function read( $fh, $content ) {
 300                 $this->content .= $content;
 301                 return strlen( $content );
 302         }
 303
 304         /**
 305          * Take care of whatever is necessary to perform the URI request.
 306          * @return Status
 307          */
 308         public function execute() {
 309                 global $wgTitle;
 310
 311                 $this->content = "";
 312
 313                 if( strtoupper($this->method) == "HEAD" ) {
 314                         $this->headersOnly = true;
 315                 }
 316
 317                 if ( is_array( $this->postData ) ) {
 318                         $this->postData = wfArrayToCGI( $this->postData );
 319                 }
 320
 321                 if ( is_object( $wgTitle ) && !isset($this->reqHeaders['Referer']) ) {
 322                         $this->setReferer( $wgTitle->getFullURL() );
 323                 }
 324
 325                 if ( !$this->noProxy ) {
 326                         $this->proxySetup();
 327                 }
 328
 329                 if ( !$this->callback ) {
 330                         $this->setCallback( array( $this, 'read' ) );
 331                 }
 332
 333                 if ( !isset($this->reqHeaders['User-Agent']) ) {
 334                         $this->setUserAgent(Http::userAgent());
 335                 }
 336         }
 337
 338         /**
 339          * Parses the headers, including the HTTP status code and any
 340          * Set-Cookie headers.  This function expectes the headers to be
 341          * found in an array in the member variable headerList.
 342          * @returns nothing
 343          */
 344         protected function parseHeader() {
 345                 $lastname = "";
 346                 foreach( $this->headerList as $header ) {
 347                         if( preg_match( "#^HTTP/([0-9.]+) (.*)#", $header, $match ) ) {
 348                                 $this->respVersion = $match[1];
 349                                 $this->respStatus = $match[2];
 350                         } elseif( preg_match( "#^[ \t]#", $header ) ) {
 351                                 $last = count($this->respHeaders[$lastname]) - 1;
 352                                 $this->respHeaders[$lastname][$last] .= "\r\n$header";
 353                         } elseif( preg_match( "#^([^:]*):[\t ]*(.*)#", $header, $match ) ) {
 354                                 $this->respHeaders[strtolower( $match[1] )][] = $match[2];
 355                                 $lastname = strtolower( $match[1] );
 356                         }
 357                 }
 358
 359                 $this->parseCookies();
 360         }
 361
 362         /**
 363          * Sets the member variable status to a fatal status if the HTTP
 364          * status code was not 200.
 365          * @returns nothing
 366          */
 367         protected function setStatus() {
 368                 if( !$this->respHeaders ) {
 369                         $this->parseHeader();
 370                 }
 371
 372                 if((int)$this->respStatus !== 200) {
 373                         list( $code, $message ) = explode(" ", $this->respStatus, 2);
 374                         $this->status->fatal("http-bad-status", $code, $message );
 375                 }
 376         }
 377
 378
 379         /**
 380          * Returns true if the last status code was a redirect.
 381          * @return bool
 382          */
 383         public function isRedirect() {
 384                 if( !$this->respHeaders ) {
 385                         $this->parseHeader();
 386                 }
 387
 388                 $status = (int)$this->respStatus;
 389                 if ( $status >= 300 && $status < 400 ) {
 390                         return true;
 391                 }
 392                 return false;
 393         }
 394
 395         /**
 396          * Returns an associative array of response headers after the
 397          * request has been executed.  Because some headers
 398          * (e.g. Set-Cookie) can appear more than once the, each value of
 399          * the associative array is an array of the values given.
 400          * @return array
 401          */
 402         public function getResponseHeaders() {
 403                 if( !$this->respHeaders ) {
 404                         $this->parseHeader();
 405                 }
 406                 return $this->respHeaders;
 407         }
 408
 409         /**
 410          * Returns the value of the given response header.
 411          * @param $header string
 412          * @return string
 413          */
 414         public function getResponseHeader($header) {
 415                 if( !$this->respHeaders ) {
 416                         $this->parseHeader();
 417                 }
 418                 if ( isset( $this->respHeaders[strtolower ( $header ) ] ) ) {
 419                         $v = $this->respHeaders[strtolower ( $header ) ];
 420                         return $v[count( $v ) - 1];
 421                 }
 422                 return null;
 423         }
 424
 425         /**
 426          * Tells the HttpRequest object to use this pre-loaded CookieJar.
 427          * @param $jar CookieJar
 428          */
 429         public function setCookieJar( $jar ) {
 430                 $this->cookieJar = $jar;
 431         }
 432
 433         /**
 434          * Returns the cookie jar in use.
 435          * @returns CookieJar
 436          */
 437         public function getCookieJar() {
 438                 if( !$this->respHeaders ) {
 439                         $this->parseHeader();
 440                 }
 441                 return $this->cookieJar;
 442         }
 443
 444         /**
 445          * Sets a cookie.  Used before a request to set up any individual
 446          * cookies.      Used internally after a request to parse the
 447          * Set-Cookie headers.
 448          * @see Cookie::set
 449          */
 450         public function setCookie( $name, $value = null, $attr = null) {
 451                 if( !$this->cookieJar ) {
 452                         $this->cookieJar = new CookieJar;
 453                 }
 454                 $this->cookieJar->setCookie($name, $value, $attr);
 455         }
 456
 457         /**
 458          * Parse the cookies in the response headers and store them in the cookie jar.
 459          */
 460         protected function parseCookies() {
 461                 if( !$this->cookieJar ) {
 462                         $this->cookieJar = new CookieJar;
 463                 }
 464                 if( isset( $this->respHeaders['set-cookie'] ) ) {
 465                         $url = parse_url( $this->getFinalUrl() );
 466                         foreach( $this->respHeaders['set-cookie'] as $cookie ) {
 467                                 $this->cookieJar->parseCookieResponseHeader( $cookie, $url['host'] );
 468                         }
 469                 }
 470         }
 471
 472         /**
 473          * Returns the final URL after all redirections.
 474          * @returns string
 475          */
 476         public function getFinalUrl() {
 477                 $location = $this->getResponseHeader("Location");
 478                 if ( $location ) {
 479                         return $location;
 480                 }
 481
 482                 return $this->url;
 483         }
 484 }
 485
 486
 487 class Cookie {
 488         protected $name;
 489         protected $value;
 490         protected $expires;
 491         protected $path;
 492         protected $domain;
 493         protected $isSessionKey = true;
 494         // TO IMPLEMENT  protected $secure
 495         // TO IMPLEMENT? protected $maxAge (add onto expires)
 496         // TO IMPLEMENT? protected $version
 497         // TO IMPLEMENT? protected $comment
 498
 499         function __construct( $name, $value, $attr ) {
 500                 $this->name = $name;
 501                 $this->set( $value, $attr );
 502         }
 503
 504         /**
 505          * Sets a cookie.  Used before a request to set up any individual
 506          * cookies.      Used internally after a request to parse the
 507          * Set-Cookie headers.
 508          * @param $name string the name of the cookie
 509          * @param $value string the value of the cookie
 510          * @param $attr array possible key/values:
 511          *              expires  A date string
 512          *              path     The path this cookie is used on
 513          *              domain   Domain this cookie is used on
 514          */
 515         public function set( $value, $attr ) {
 516                 $this->value = $value;
 517                 if( isset( $attr['expires'] ) ) {
 518                         $this->isSessionKey = false;
 519                         $this->expires = strtotime( $attr['expires'] );
 520                 }
 521                 if( isset( $attr['path'] ) ) {
 522                         $this->path = $attr['path'];
 523                 } else {
 524                         $this->path = "/";
 525                 }
 526                 if( isset( $attr['domain'] ) ) {
 527                         if( self::validateCookieDomain( $attr['domain'] ) ) {
 528                                 $this->domain = $attr['domain'];
 529                         }
 530                 } else {
 531                         throw new MWException("You must specify a domain.");
 532                 }
 533         }
 534
 535         /**
 536          * Return the true if the cookie is valid is valid.  Otherwise,
 537          * false.  The uses a method similar to IE cookie security
 538          * described here:
 539          * http://kuza55.blogspot.com/2008/02/understanding-cookie-security.html
 540          * A better method might be to use a blacklist like
 541          * http://publicsuffix.org/
 542          *
 543          * @param $domain string the domain to validate
 544          * @param $originDomain string (optional) the domain the cookie originates from
 545          * @return bool
 546          */
 547         public static function validateCookieDomain( $domain, $originDomain = null) {
 548                 // Don't allow a trailing dot
 549                 if( substr( $domain, -1 ) == "." ) return false;
 550
 551                 $dc = explode(".", $domain);
 552
 553                 // Don't allow cookies for "localhost", "ls" or other dot-less hosts
 554                 if( count($dc) < 2 ) return false;
 555
 556                 // Only allow full, valid IP addresses
 557                 if( preg_match( '/^[0-9.]+$/', $domain ) ) {
 558                         if( count( $dc ) != 4 ) return false;
 559
 560                         if( ip2long( $domain ) === false ) return false;
 561
 562                         if( $originDomain == null || $originDomain == $domain ) return true;
 563
 564                 }
 565
 566                 // Don't allow cookies for "co.uk" or "gov.uk", etc, but allow "supermarket.uk"
 567                 if( strrpos( $domain, "." ) - strlen( $domain )  == -3 ) {
 568                         if( (count($dc) == 2 && strlen( $dc[0] ) <= 2 )
 569                                 || (count($dc) == 3 && strlen( $dc[0] ) == "" && strlen( $dc[1] ) <= 2 ) ) {
 570                                 return false;
 571                         }
 572                         if( (count($dc) == 2 || (count($dc) == 3 && $dc[0] == "") )
 573                                 && preg_match( '/(com|net|org|gov|edu)\...$/', $domain) ) {
 574                                 return false;
 575                         }
 576                 }
 577
 578                 if( $originDomain != null ) {
 579                         if( substr( $domain, 0, 1 ) != "." && $domain != $originDomain ) {
 580                                 return false;
 581                         }
 582                         if( substr( $domain, 0, 1 ) == "."
 583                                 && substr_compare( $originDomain, $domain, -strlen( $domain ),
 584                                                                    strlen( $domain ), TRUE ) != 0 ) {
 585                                 return false;
 586                         }
 587                 }
 588
 589                 return true;
 590         }
 591
 592         /**
 593          * Serialize the cookie jar into a format useful for HTTP Request headers.
 594          * @param $path string the path that will be used. Required.
 595          * @param $domain string the domain that will be used. Required.
 596          * @return string
 597          */
 598         public function serializeToHttpRequest( $path, $domain ) {
 599                 $ret = "";
 600
 601                 if( $this->canServeDomain( $domain )
 602                                 && $this->canServePath( $path )
 603                                 && $this->isUnExpired() ) {
 604                         $ret = $this->name ."=". $this->value;
 605                 }
 606
 607                 return $ret;
 608         }
 609
 610         protected function canServeDomain( $domain ) {
 611                 if( $domain == $this->domain
 612                         || ( strlen( $domain) > strlen( $this->domain )
 613                                  && substr( $this->domain, 0, 1) == "."
 614                                  && substr_compare( $domain, $this->domain, -strlen( $this->domain ),
 615                                                                         strlen( $this->domain ), TRUE ) == 0 ) ) {
 616                         return true;
 617                 }
 618                 return false;
 619         }
 620
 621         protected function canServePath( $path ) {
 622                 if( $this->path && substr_compare( $this->path, $path, 0, strlen( $this->path ) ) == 0 ) {
 623                         return true;
 624                 }
 625                 return false;
 626         }
 627
 628         protected function isUnExpired() {
 629                 if( $this->isSessionKey || $this->expires > time() ) {
 630                         return true;
 631                 }
 632                 return false;
 633         }
 634
 635 }
 636
 637 class CookieJar {
 638         private $cookie = array();
 639
 640         /**
 641          * Set a cookie in the cookie jar.      Make sure only one cookie per-name exists.
 642          * @see Cookie::set()
 643          */
 644         public function setCookie ($name, $value, $attr) {
 645                 /* cookies: case insensitive, so this should work.
 646                  * We'll still send the cookies back in the same case we got them, though.
 647                  */
 648                 $index = strtoupper($name);
 649                 if( isset( $this->cookie[$index] ) ) {
 650                         $this->cookie[$index]->set( $value, $attr );
 651                 } else {
 652                         $this->cookie[$index] = new Cookie( $name, $value, $attr );
 653                 }
 654         }
 655
 656         /**
 657          * @see Cookie::serializeToHttpRequest
 658          */
 659         public function serializeToHttpRequest( $path, $domain ) {
 660                 $cookies = array();
 661
 662                 foreach( $this->cookie as $c ) {
 663                         $serialized = $c->serializeToHttpRequest( $path, $domain );
 664                         if ( $serialized ) $cookies[] = $serialized;
 665                 }
 666
 667                 return implode("; ", $cookies);
 668         }
 669
 670         /**
 671          * Parse the content of an Set-Cookie HTTP Response header.
 672          * @param $cookie string
 673          */
 674         public function parseCookieResponseHeader ( $cookie, $domain ) {
 675                 $len = strlen( "Set-Cookie:" );
 676                 if ( substr_compare( "Set-Cookie:", $cookie, 0, $len, TRUE ) === 0 ) {
 677                         $cookie = substr( $cookie, $len );
 678                 }
 679
 680                 $bit = array_map( 'trim', explode( ";", $cookie ) );
 681                 if ( count($bit) >= 1 ) {
 682                         list($name, $value) = explode( "=", array_shift( $bit ), 2 );
 683                         $attr = array();
 684                         foreach( $bit as $piece ) {
 685                                 $parts = explode( "=", $piece );
 686                                 if( count( $parts ) > 1 ) {
 687                                         $attr[strtolower( $parts[0] )] = $parts[1];
 688                                 } else {
 689                                         $attr[strtolower( $parts[0] )] = true;
 690                                 }
 691                         }
 692
 693                         if( !isset( $attr['domain'] ) ) {
 694                                 $attr['domain'] = $domain;
 695                         } elseif ( !Cookie::validateCookieDomain( $attr['domain'], $domain ) ) {
 696                                 return null;
 697                         }
 698
 699                         $this->setCookie( $name, $value, $attr );
 700                 }
 701         }
 702 }
 703
 704
 705 /**
 706  * HttpRequest implemented using internal curl compiled into PHP
 707  */
 708 class CurlHttpRequest extends HttpRequest {
 709         static $curlMessageMap = array(
 710                 6 => 'http-host-unreachable',
 711                 28 => 'http-timed-out'
 712         );
 713
 714         protected $curlOptions = array();
 715         protected $headerText = "";
 716
 717         protected function readHeader( $fh, $content ) {
 718                 $this->headerText .= $content;
 719                 return strlen( $content );
 720         }
 721
 722         public function execute() {
 723                 parent::execute();
 724                 if ( !$this->status->isOK() ) {
 725                         return $this->status;
 726                 }
 727                 $this->curlOptions[CURLOPT_PROXY] = $this->proxy;
 728                 $this->curlOptions[CURLOPT_TIMEOUT] = $this->timeout;
 729                 $this->curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_0;
 730                 $this->curlOptions[CURLOPT_WRITEFUNCTION] = $this->callback;
 731                 $this->curlOptions[CURLOPT_HEADERFUNCTION] = array($this, "readHeader");
 732                 $this->curlOptions[CURLOPT_FOLLOWLOCATION] = $this->followRedirects;
 733                 $this->curlOptions[CURLOPT_MAXREDIRS] = $this->maxRedirects;
 734
 735                 /* not sure these two are actually necessary */
 736                 if(isset($this->reqHeaders['Referer'])) {
 737                         $this->curlOptions[CURLOPT_REFERER] = $this->reqHeaders['Referer'];
 738                 }
 739                 $this->curlOptions[CURLOPT_USERAGENT] = $this->reqHeaders['User-Agent'];
 740
 741                 if ( isset( $this->sslVerifyHost ) ) {
 742                         $this->curlOptions[CURLOPT_SSL_VERIFYHOST] = $this->sslVerifyHost;
 743                 }
 744
 745                 if ( isset( $this->sslVerifyCert ) ) {
 746                         $this->curlOptions[CURLOPT_SSL_VERIFYPEER] = $this->sslVerifyCert;
 747                 }
 748
 749                 if ( $this->caInfo ) {
 750                         $this->curlOptions[CURLOPT_CAINFO] = $this->caInfo;
 751                 }
 752
 753                 if ( $this->headersOnly ) {
 754                         $this->curlOptions[CURLOPT_NOBODY] = true;
 755                         $this->curlOptions[CURLOPT_HEADER] = true;
 756                 } elseif ( $this->method == 'POST' ) {
 757                         $this->curlOptions[CURLOPT_POST] = true;
 758                         $this->curlOptions[CURLOPT_POSTFIELDS] = $this->postData;
 759                         // Suppress 'Expect: 100-continue' header, as some servers
 760                         // will reject it with a 417 and Curl won't auto retry
 761                         // with HTTP 1.0 fallback
 762                         $this->reqHeaders['Expect'] = '';
 763                 } else {
 764                         $this->curlOptions[CURLOPT_CUSTOMREQUEST] = $this->method;
 765                 }
 766
 767                 $this->curlOptions[CURLOPT_HTTPHEADER] = $this->getHeaderList();
 768
 769                 $curlHandle = curl_init( $this->url );
 770                 curl_setopt_array( $curlHandle, $this->curlOptions );
 771
 772                 if ( false === curl_exec( $curlHandle ) ) {
 773                         $code = curl_error( $curlHandle );
 774
 775                         if ( isset( self::$curlMessageMap[$code] ) ) {
 776                                 $this->status->fatal( self::$curlMessageMap[$code] );
 777                         } else {
 778                                 $this->status->fatal( 'http-curl-error', curl_error( $curlHandle ) );
 779                         }
 780                 } else {
 781                         $this->headerList = explode("\r\n", $this->headerText);
 782                 }
 783
 784                 curl_close( $curlHandle );
 785
 786                 $this->parseHeader();
 787                 $this->setStatus();
 788                 return $this->status;
 789         }
 790 }
 791
 792 class PhpHttpRequest extends HttpRequest {
 793         protected $manuallyRedirect = false;
 794
 795         protected function urlToTcp( $url ) {
 796                 $parsedUrl = parse_url( $url );
 797
 798                 return 'tcp://' . $parsedUrl['host'] . ':' . $parsedUrl['port'];
 799         }
 800
 801         public function execute() {
 802                 parent::execute();
 803
 804                 // At least on Centos 4.8 with PHP 5.1.6, using max_redirects to follow redirects
 805                 // causes a segfault
 806                 if ( version_compare( '5.1.7', phpversion(), '>' ) ) {
 807                         $this->manuallyRedirect = true;
 808                 }
 809
 810                 if ( $this->parsedUrl['scheme'] != 'http' ) {
 811                         $this->status->fatal( 'http-invalid-scheme', $this->parsedUrl['scheme'] );
 812                 }
 813
 814                 $this->reqHeaders['Accept'] = "*/*";
 815                 if ( $this->method == 'POST' ) {
 816                         // Required for HTTP 1.0 POSTs
 817                         $this->reqHeaders['Content-Length'] = strlen( $this->postData );
 818                         $this->reqHeaders['Content-type'] = "application/x-www-form-urlencoded";
 819                 }
 820
 821                 $options = array();
 822                 if ( $this->proxy && !$this->noProxy ) {
 823                         $options['proxy'] = $this->urlToTCP( $this->proxy );
 824                         $options['request_fulluri'] = true;
 825                 }
 826
 827                 if ( !$this->followRedirects || $this->manuallyRedirect ) {
 828                         $options['max_redirects'] = 0;
 829                 } else {
 830                         $options['max_redirects'] = $this->maxRedirects;
 831                 }
 832
 833                 $options['method'] = $this->method;
 834                 $options['header'] = implode("\r\n", $this->getHeaderList());
 835                 // Note that at some future point we may want to support
 836                 // HTTP/1.1, but we'd have to write support for chunking
 837                 // in version of PHP < 5.3.1
 838                 $options['protocol_version'] = "1.0";
 839
 840                 // This is how we tell PHP we want to deal with 404s (for example) ourselves.
 841                 // Only works on 5.2.10+
 842                 $options['ignore_errors'] = true;
 843
 844                 if ( $this->postData ) {
 845                         $options['content'] = $this->postData;
 846                 }
 847
 848                 $oldTimeout = false;
 849                 if ( version_compare( '5.2.1', phpversion(), '>' ) ) {
 850                         $oldTimeout = ini_set('default_socket_timeout', $this->timeout);
 851                 } else {
 852                         $options['timeout'] = $this->timeout;
 853                 }
 854
 855                 $context = stream_context_create( array( 'http' => $options ) );
 856
 857                 $this->headerList = array();
 858                 $reqCount = 0;
 859                 $url = $this->url;
 860                 do {
 861                         $again = false;
 862                         $reqCount++;
 863                         wfSuppressWarnings();
 864                         $fh = fopen( $url, "r", false, $context );
 865                         wfRestoreWarnings();
 866                         if ( $fh ) {
 867                                 $result = stream_get_meta_data( $fh );
 868                                 $this->headerList = $result['wrapper_data'];
 869                                 $this->parseHeader();
 870                                 $url = $this->getResponseHeader("Location");
 871                                 $again = $this->manuallyRedirect && $this->followRedirects && $url
 872                                         && $this->isRedirect() && $this->maxRedirects > $reqCount;
 873                         }
 874                 } while ( $again );
 875
 876                 if ( $oldTimeout !== false ) {
 877                         ini_set('default_socket_timeout', $oldTimeout);
 878                 }
 879                 $this->setStatus();
 880
 881                 if ( $fh === false ) {
 882                         $this->status->fatal( 'http-request-error' );
 883                         return $this->status;
 884                 }
 885
 886                 if ( $result['timed_out'] ) {
 887                         $this->status->fatal( 'http-timed-out', $this->url );
 888                         return $this->status;
 889                 }
 890
 891                 if($this->status->isOK()) {
 892                         while ( !feof( $fh ) ) {
 893                                 $buf = fread( $fh, 8192 );
 894                                 if ( $buf === false ) {
 895                                         $this->status->fatal( 'http-read-error' );
 896                                         break;
 897                                 }
 898                                 if ( strlen( $buf ) ) {
 899                                         call_user_func( $this->callback, $fh, $buf );
 900                                 }
 901                         }
 902                 }
 903                 fclose( $fh );
 904
 905                 return $this->status;
 906         }
 907 }