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