diff options
Diffstat (limited to 'includes/HttpFunctions.php')
| -rw-r--r-- | includes/HttpFunctions.php | 929 |
1 files changed, 830 insertions, 99 deletions
diff --git a/includes/HttpFunctions.php b/includes/HttpFunctions.php index 269d45ff..d5983635 100644 --- a/includes/HttpFunctions.php +++ b/includes/HttpFunctions.php @@ -1,9 +1,6 @@ <?php - /** * @defgroup HTTP HTTP - * @file - * @ingroup HTTP */ /** @@ -11,111 +8,54 @@ * @ingroup HTTP */ class Http { + static $httpEngine = false; /** - * Simple wrapper for Http::request( 'GET' ) - * @see Http::request() + * Perform an HTTP request + * @param $method string HTTP method. Usually GET/POST + * @param $url string Full URL to act on + * @param $options options to pass to HttpRequest object + * Possible keys for the array: + * timeout Timeout length in seconds + * postData An array of key-value pairs or a url-encoded form data + * proxy The proxy to use. Will use $wgHTTPProxy (if set) otherwise. + * noProxy Override $wgHTTPProxy (if set) and don't use any proxy at all. + * sslVerifyHost (curl only) Verify the SSL certificate + * caInfo (curl only) Provide CA information + * maxRedirects Maximum number of redirects to follow (defaults to 5) + * followRedirects Whether to follow redirects (defaults to true) + * @returns mixed (bool)false on failure or a string on success */ - public static function get( $url, $timeout = 'default', $opts = array() ) { - return Http::request( "GET", $url, $timeout, $opts ); + public static function request( $method, $url, $options = array() ) { + wfDebug( "HTTP: $method: $url" ); + $options['method'] = strtoupper( $method ); + if ( !isset( $options['timeout'] ) ) { + $options['timeout'] = 'default'; + } + $req = HttpRequest::factory( $url, $options ); + $status = $req->execute(); + if ( $status->isOK() ) { + return $req->getContent(); + } else { + return false; + } } /** - * Simple wrapper for Http::request( 'POST' ) + * Simple wrapper for Http::request( 'GET' ) * @see Http::request() */ - public static function post( $url, $timeout = 'default', $opts = array() ) { - return Http::request( "POST", $url, $timeout, $opts ); + public static function get( $url, $timeout = 'default', $options = array() ) { + $options['timeout'] = $timeout; + return Http::request( 'GET', $url, $options ); } /** - * Get the contents of a file by HTTP - * @param $method string HTTP method. Usually GET/POST - * @param $url string Full URL to act on - * @param $timeout int Seconds to timeout. 'default' falls to $wgHTTPTimeout - * @param $curlOptions array Optional array of extra params to pass - * to curl_setopt() - */ - public static function request( $method, $url, $timeout = 'default', $curlOptions = array() ) { - global $wgHTTPTimeout, $wgHTTPProxy, $wgTitle; - - // Go ahead and set the timeout if not otherwise specified - if ( $timeout == 'default' ) { - $timeout = $wgHTTPTimeout; - } - - wfDebug( __METHOD__ . ": $method $url\n" ); - # Use curl if available - if ( function_exists( 'curl_init' ) ) { - $c = curl_init( $url ); - if ( self::isLocalURL( $url ) ) { - curl_setopt( $c, CURLOPT_PROXY, 'localhost:80' ); - } else if ($wgHTTPProxy) { - curl_setopt($c, CURLOPT_PROXY, $wgHTTPProxy); - } - - curl_setopt( $c, CURLOPT_TIMEOUT, $timeout ); - curl_setopt( $c, CURLOPT_USERAGENT, self :: userAgent() ); - if ( $method == 'POST' ) { - curl_setopt( $c, CURLOPT_POST, true ); - curl_setopt( $c, CURLOPT_POSTFIELDS, '' ); - } - else - curl_setopt( $c, CURLOPT_CUSTOMREQUEST, $method ); - - # Set the referer to $wgTitle, even in command-line mode - # This is useful for interwiki transclusion, where the foreign - # server wants to know what the referring page is. - # $_SERVER['REQUEST_URI'] gives a less reliable indication of the - # referring page. - if ( is_object( $wgTitle ) ) { - curl_setopt( $c, CURLOPT_REFERER, $wgTitle->getFullURL() ); - } - - if ( is_array( $curlOptions ) ) { - foreach( $curlOptions as $option => $value ) { - curl_setopt( $c, $option, $value ); - } - } - - ob_start(); - curl_exec( $c ); - $text = ob_get_contents(); - ob_end_clean(); - - # Don't return the text of error messages, return false on error - $retcode = curl_getinfo( $c, CURLINFO_HTTP_CODE ); - if ( $retcode != 200 ) { - wfDebug( __METHOD__ . ": HTTP return code $retcode\n" ); - $text = false; - } - # Don't return truncated output - $errno = curl_errno( $c ); - if ( $errno != CURLE_OK ) { - $errstr = curl_error( $c ); - wfDebug( __METHOD__ . ": CURL error code $errno: $errstr\n" ); - $text = false; - } - curl_close( $c ); - } else { - # Otherwise use file_get_contents... - # This doesn't have local fetch capabilities... - - $headers = array( "User-Agent: " . self :: userAgent() ); - if( strcasecmp( $method, 'post' ) == 0 ) { - // Required for HTTP 1.0 POSTs - $headers[] = "Content-Length: 0"; - } - $opts = array( - 'http' => array( - 'method' => $method, - 'header' => implode( "\r\n", $headers ), - 'timeout' => $timeout ) ); - $ctx = stream_context_create($opts); - - $text = file_get_contents( $url, false, $ctx ); - } - return $text; + * Simple wrapper for Http::request( 'POST' ) + * @see Http::request() + */ + public static function post( $url, $options = array() ) { + return Http::request( 'POST', $url, $options ); } /** @@ -151,12 +91,803 @@ class Http { } return false; } - + /** - * Return a standard user-agent we can use for external requests. + * A standard user-agent we can use for external requests. + * @returns string */ public static function userAgent() { global $wgVersion; return "MediaWiki/$wgVersion"; } + + /** + * Checks that the given URI is a valid one + * @param $uri Mixed: URI to check for validity + * @returns bool + */ + public static function isValidURI( $uri ) { + return preg_match( + '/(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/', + $uri, + $matches + ); + } +} + +/** + * This wrapper class will call out to curl (if available) or fallback + * to regular PHP if necessary for handling internal HTTP requests. + */ +class HttpRequest { + protected $content; + protected $timeout = 'default'; + protected $headersOnly = null; + protected $postData = null; + protected $proxy = null; + protected $noProxy = false; + protected $sslVerifyHost = true; + protected $caInfo = null; + protected $method = "GET"; + protected $reqHeaders = array(); + protected $url; + protected $parsedUrl; + protected $callback; + protected $maxRedirects = 5; + protected $followRedirects = true; + + protected $cookieJar; + + protected $headerList = array(); + protected $respVersion = "0.9"; + protected $respStatus = "200 Ok"; + protected $respHeaders = array(); + + public $status; + + /** + * @param $url string url to use + * @param $options array (optional) extra params to pass (see Http::request()) + */ + function __construct( $url, $options = array() ) { + global $wgHTTPTimeout; + + $this->url = $url; + $this->parsedUrl = parse_url( $url ); + + if ( !Http::isValidURI( $this->url ) ) { + $this->status = Status::newFatal('http-invalid-url'); + } else { + $this->status = Status::newGood( 100 ); // continue + } + + if ( isset($options['timeout']) && $options['timeout'] != 'default' ) { + $this->timeout = $options['timeout']; + } else { + $this->timeout = $wgHTTPTimeout; + } + + $members = array( "postData", "proxy", "noProxy", "sslVerifyHost", "caInfo", + "method", "followRedirects", "maxRedirects" ); + foreach ( $members as $o ) { + if ( isset($options[$o]) ) { + $this->$o = $options[$o]; + } + } + } + + /** + * Generate a new request object + * @see HttpRequest::__construct + */ + public static function factory( $url, $options = null ) { + if ( !Http::$httpEngine ) { + Http::$httpEngine = function_exists( 'curl_init' ) ? 'curl' : 'php'; + } elseif ( Http::$httpEngine == 'curl' && !function_exists( 'curl_init' ) ) { + throw new MWException( __METHOD__.': curl (http://php.net/curl) is not installed, but'. + ' Http::$httpEngine is set to "curl"' ); + } + + switch( Http::$httpEngine ) { + case 'curl': + return new CurlHttpRequest( $url, $options ); + case 'php': + if ( !wfIniGetBool( 'allow_url_fopen' ) ) { + throw new MWException( __METHOD__.': allow_url_fopen needs to be enabled for pure PHP'. + ' http requests to work. If possible, curl should be used instead. See http://php.net/curl.' ); + } + return new PhpHttpRequest( $url, $options ); + default: + throw new MWException( __METHOD__.': The setting of Http::$httpEngine is not valid.' ); + } + } + + /** + * Get the body, or content, of the response to the request + * @return string + */ + public function getContent() { + return $this->content; + } + + /** + * Take care of setting up the proxy + * (override in subclass) + * @return string + */ + public function proxySetup() { + global $wgHTTPProxy; + + if ( $this->proxy ) { + return; + } + if ( Http::isLocalURL( $this->url ) ) { + $this->proxy = 'http://localhost:80/'; + } elseif ( $wgHTTPProxy ) { + $this->proxy = $wgHTTPProxy ; + } elseif ( getenv( "http_proxy" ) ) { + $this->proxy = getenv( "http_proxy" ); + } + } + + /** + * Set the refererer header + */ + public function setReferer( $url ) { + $this->setHeader('Referer', $url); + } + + /** + * Set the user agent + */ + public function setUserAgent( $UA ) { + $this->setHeader('User-Agent', $UA); + } + + /** + * Set an arbitrary header + */ + public function setHeader($name, $value) { + // I feel like I should normalize the case here... + $this->reqHeaders[$name] = $value; + } + + /** + * Get an array of the headers + */ + public function getHeaderList() { + $list = array(); + + if( $this->cookieJar ) { + $this->reqHeaders['Cookie'] = + $this->cookieJar->serializeToHttpRequest($this->parsedUrl['path'], + $this->parsedUrl['host']); + } + foreach($this->reqHeaders as $name => $value) { + $list[] = "$name: $value"; + } + return $list; + } + + /** + * Set the callback + * @param $callback callback + */ + public function setCallback( $callback ) { + $this->callback = $callback; + } + + /** + * A generic callback to read the body of the response from a remote + * server. + * @param $fh handle + * @param $content string + */ + public function read( $fh, $content ) { + $this->content .= $content; + return strlen( $content ); + } + + /** + * Take care of whatever is necessary to perform the URI request. + * @return Status + */ + public function execute() { + global $wgTitle; + + if( strtoupper($this->method) == "HEAD" ) { + $this->headersOnly = true; + } + + if ( is_array( $this->postData ) ) { + $this->postData = wfArrayToCGI( $this->postData ); + } + + if ( is_object( $wgTitle ) && !isset($this->reqHeaders['Referer']) ) { + $this->setReferer( $wgTitle->getFullURL() ); + } + + if ( !$this->noProxy ) { + $this->proxySetup(); + } + + if ( !$this->callback ) { + $this->setCallback( array( $this, 'read' ) ); + } + + if ( !isset($this->reqHeaders['User-Agent']) ) { + $this->setUserAgent(Http::userAgent()); + } + } + + /** + * Parses the headers, including the HTTP status code and any + * Set-Cookie headers. This function expectes the headers to be + * found in an array in the member variable headerList. + * @returns nothing + */ + protected function parseHeader() { + $lastname = ""; + foreach( $this->headerList as $header ) { + if( preg_match( "#^HTTP/([0-9.]+) (.*)#", $header, $match ) ) { + $this->respVersion = $match[1]; + $this->respStatus = $match[2]; + } elseif( preg_match( "#^[ \t]#", $header ) ) { + $last = count($this->respHeaders[$lastname]) - 1; + $this->respHeaders[$lastname][$last] .= "\r\n$header"; + } elseif( preg_match( "#^([^:]*):[\t ]*(.*)#", $header, $match ) ) { + $this->respHeaders[strtolower( $match[1] )][] = $match[2]; + $lastname = strtolower( $match[1] ); + } + } + + $this->parseCookies(); + } + + /** + * Sets the member variable status to a fatal status if the HTTP + * status code was not 200. + * @returns nothing + */ + protected function setStatus() { + if( !$this->respHeaders ) { + $this->parseHeader(); + } + + if((int)$this->respStatus !== 200) { + list( $code, $message ) = explode(" ", $this->respStatus, 2); + $this->status->fatal("http-bad-status", $code, $message ); + } + } + + + /** + * Returns true if the last status code was a redirect. + * @return bool + */ + public function isRedirect() { + if( !$this->respHeaders ) { + $this->parseHeader(); + } + + $status = (int)$this->respStatus; + if ( $status >= 300 && $status < 400 ) { + return true; + } + return false; + } + + /** + * Returns an associative array of response headers after the + * request has been executed. Because some headers + * (e.g. Set-Cookie) can appear more than once the, each value of + * the associative array is an array of the values given. + * @return array + */ + public function getResponseHeaders() { + if( !$this->respHeaders ) { + $this->parseHeader(); + } + return $this->respHeaders; + } + + /** + * Returns the value of the given response header. + * @param $header string + * @return string + */ + public function getResponseHeader($header) { + if( !$this->respHeaders ) { + $this->parseHeader(); + } + if ( isset( $this->respHeaders[strtolower ( $header ) ] ) ) { + $v = $this->respHeaders[strtolower ( $header ) ]; + return $v[count( $v ) - 1]; + } + return null; + } + + /** + * Tells the HttpRequest object to use this pre-loaded CookieJar. + * @param $jar CookieJar + */ + public function setCookieJar( $jar ) { + $this->cookieJar = $jar; + } + + /** + * Returns the cookie jar in use. + * @returns CookieJar + */ + public function getCookieJar() { + if( !$this->respHeaders ) { + $this->parseHeader(); + } + return $this->cookieJar; + } + + /** + * Sets a cookie. Used before a request to set up any individual + * cookies. Used internally after a request to parse the + * Set-Cookie headers. + * @see Cookie::set + */ + public function setCookie( $name, $value = null, $attr = null) { + if( !$this->cookieJar ) { + $this->cookieJar = new CookieJar; + } + $this->cookieJar->setCookie($name, $value, $attr); + } + + /** + * Parse the cookies in the response headers and store them in the cookie jar. + */ + protected function parseCookies() { + if( !$this->cookieJar ) { + $this->cookieJar = new CookieJar; + } + if( isset( $this->respHeaders['set-cookie'] ) ) { + $url = parse_url( $this->getFinalUrl() ); + foreach( $this->respHeaders['set-cookie'] as $cookie ) { + $this->cookieJar->parseCookieResponseHeader( $cookie, $url['host'] ); + } + } + } + + /** + * Returns the final URL after all redirections. + * @returns string + */ + public function getFinalUrl() { + $location = $this->getResponseHeader("Location"); + if ( $location ) { + return $location; + } + + return $this->url; + } +} + + +class Cookie { + protected $name; + protected $value; + protected $expires; + protected $path; + protected $domain; + protected $isSessionKey = true; + // TO IMPLEMENT protected $secure + // TO IMPLEMENT? protected $maxAge (add onto expires) + // TO IMPLEMENT? protected $version + // TO IMPLEMENT? protected $comment + + function __construct( $name, $value, $attr ) { + $this->name = $name; + $this->set( $value, $attr ); + } + + /** + * Sets a cookie. Used before a request to set up any individual + * cookies. Used internally after a request to parse the + * Set-Cookie headers. + * @param $name string the name of the cookie + * @param $value string the value of the cookie + * @param $attr array possible key/values: + * expires A date string + * path The path this cookie is used on + * domain Domain this cookie is used on + */ + public function set( $value, $attr ) { + $this->value = $value; + if( isset( $attr['expires'] ) ) { + $this->isSessionKey = false; + $this->expires = strtotime( $attr['expires'] ); + } + if( isset( $attr['path'] ) ) { + $this->path = $attr['path']; + } else { + $this->path = "/"; + } + if( isset( $attr['domain'] ) ) { + if( self::validateCookieDomain( $attr['domain'] ) ) { + $this->domain = $attr['domain']; + } + } else { + throw new MWException("You must specify a domain."); + } + } + + /** + * Return the true if the cookie is valid is valid. Otherwise, + * false. The uses a method similar to IE cookie security + * described here: + * http://kuza55.blogspot.com/2008/02/understanding-cookie-security.html + * A better method might be to use a blacklist like + * http://publicsuffix.org/ + * + * @param $domain string the domain to validate + * @param $originDomain string (optional) the domain the cookie originates from + * @return bool + */ + public static function validateCookieDomain( $domain, $originDomain = null) { + // Don't allow a trailing dot + if( substr( $domain, -1 ) == "." ) return false; + + $dc = explode(".", $domain); + + // Don't allow cookies for "localhost", "ls" or other dot-less hosts + if( count($dc) < 2 ) return false; + + // Only allow full, valid IP addresses + if( preg_match( '/^[0-9.]+$/', $domain ) ) { + if( count( $dc ) != 4 ) return false; + + if( ip2long( $domain ) === false ) return false; + + if( $originDomain == null || $originDomain == $domain ) return true; + + } + + // Don't allow cookies for "co.uk" or "gov.uk", etc, but allow "supermarket.uk" + if( strrpos( $domain, "." ) - strlen( $domain ) == -3 ) { + if( (count($dc) == 2 && strlen( $dc[0] ) <= 2 ) + || (count($dc) == 3 && strlen( $dc[0] ) == "" && strlen( $dc[1] ) <= 2 ) ) { + return false; + } + if( (count($dc) == 2 || (count($dc) == 3 && $dc[0] == "") ) + && preg_match( '/(com|net|org|gov|edu)\...$/', $domain) ) { + return false; + } + } + + if( $originDomain != null ) { + if( substr( $domain, 0, 1 ) != "." && $domain != $originDomain ) { + return false; + } + if( substr( $domain, 0, 1 ) == "." + && substr_compare( $originDomain, $domain, -strlen( $domain ), + strlen( $domain ), TRUE ) != 0 ) { + return false; + } + } + + return true; + } + + /** + * Serialize the cookie jar into a format useful for HTTP Request headers. + * @param $path string the path that will be used. Required. + * @param $domain string the domain that will be used. Required. + * @return string + */ + public function serializeToHttpRequest( $path, $domain ) { + $ret = ""; + + if( $this->canServeDomain( $domain ) + && $this->canServePath( $path ) + && $this->isUnExpired() ) { + $ret = $this->name ."=". $this->value; + } + + return $ret; + } + + protected function canServeDomain( $domain ) { + if( $domain == $this->domain + || ( strlen( $domain) > strlen( $this->domain ) + && substr( $this->domain, 0, 1) == "." + && substr_compare( $domain, $this->domain, -strlen( $this->domain ), + strlen( $this->domain ), TRUE ) == 0 ) ) { + return true; + } + return false; + } + + protected function canServePath( $path ) { + if( $this->path && substr_compare( $this->path, $path, 0, strlen( $this->path ) ) == 0 ) { + return true; + } + return false; + } + + protected function isUnExpired() { + if( $this->isSessionKey || $this->expires > time() ) { + return true; + } + return false; + } + +} + +class CookieJar { + private $cookie = array(); + + /** + * Set a cookie in the cookie jar. Make sure only one cookie per-name exists. + * @see Cookie::set() + */ + public function setCookie ($name, $value, $attr) { + /* cookies: case insensitive, so this should work. + * We'll still send the cookies back in the same case we got them, though. + */ + $index = strtoupper($name); + if( isset( $this->cookie[$index] ) ) { + $this->cookie[$index]->set( $value, $attr ); + } else { + $this->cookie[$index] = new Cookie( $name, $value, $attr ); + } + } + + /** + * @see Cookie::serializeToHttpRequest + */ + public function serializeToHttpRequest( $path, $domain ) { + $cookies = array(); + + foreach( $this->cookie as $c ) { + $serialized = $c->serializeToHttpRequest( $path, $domain ); + if ( $serialized ) $cookies[] = $serialized; + } + + return implode("; ", $cookies); + } + + /** + * Parse the content of an Set-Cookie HTTP Response header. + * @param $cookie string + */ + public function parseCookieResponseHeader ( $cookie, $domain ) { + $len = strlen( "Set-Cookie:" ); + if ( substr_compare( "Set-Cookie:", $cookie, 0, $len, TRUE ) === 0 ) { + $cookie = substr( $cookie, $len ); + } + + $bit = array_map( 'trim', explode( ";", $cookie ) ); + if ( count($bit) >= 1 ) { + list($name, $value) = explode( "=", array_shift( $bit ), 2 ); + $attr = array(); + foreach( $bit as $piece ) { + $parts = explode( "=", $piece ); + if( count( $parts ) > 1 ) { + $attr[strtolower( $parts[0] )] = $parts[1]; + } else { + $attr[strtolower( $parts[0] )] = true; + } + } + + if( !isset( $attr['domain'] ) ) { + $attr['domain'] = $domain; + } elseif ( !Cookie::validateCookieDomain( $attr['domain'], $domain ) ) { + return null; + } + + $this->setCookie( $name, $value, $attr ); + } + } +} + + +/** + * HttpRequest implemented using internal curl compiled into PHP + */ +class CurlHttpRequest extends HttpRequest { + static $curlMessageMap = array( + 6 => 'http-host-unreachable', + 28 => 'http-timed-out' + ); + + protected $curlOptions = array(); + protected $headerText = ""; + + protected function readHeader( $fh, $content ) { + $this->headerText .= $content; + return strlen( $content ); + } + + public function execute() { + parent::execute(); + if ( !$this->status->isOK() ) { + return $this->status; + } + $this->curlOptions[CURLOPT_PROXY] = $this->proxy; + $this->curlOptions[CURLOPT_TIMEOUT] = $this->timeout; + $this->curlOptions[CURLOPT_HTTP_VERSION] = CURL_HTTP_VERSION_1_0; + $this->curlOptions[CURLOPT_WRITEFUNCTION] = $this->callback; + $this->curlOptions[CURLOPT_HEADERFUNCTION] = array($this, "readHeader"); + $this->curlOptions[CURLOPT_MAXREDIRS] = $this->maxRedirects; + + /* not sure these two are actually necessary */ + if(isset($this->reqHeaders['Referer'])) { + $this->curlOptions[CURLOPT_REFERER] = $this->reqHeaders['Referer']; + } + $this->curlOptions[CURLOPT_USERAGENT] = $this->reqHeaders['User-Agent']; + + if ( $this->sslVerifyHost ) { + $this->curlOptions[CURLOPT_SSL_VERIFYHOST] = $this->sslVerifyHost; + } + + if ( $this->caInfo ) { + $this->curlOptions[CURLOPT_CAINFO] = $this->caInfo; + } + + if ( $this->headersOnly ) { + $this->curlOptions[CURLOPT_NOBODY] = true; + $this->curlOptions[CURLOPT_HEADER] = true; + } elseif ( $this->method == 'POST' ) { + $this->curlOptions[CURLOPT_POST] = true; + $this->curlOptions[CURLOPT_POSTFIELDS] = $this->postData; + // Suppress 'Expect: 100-continue' header, as some servers + // will reject it with a 417 and Curl won't auto retry + // with HTTP 1.0 fallback + $this->reqHeaders['Expect'] = ''; + } else { + $this->curlOptions[CURLOPT_CUSTOMREQUEST] = $this->method; + } + + $this->curlOptions[CURLOPT_HTTPHEADER] = $this->getHeaderList(); + + $curlHandle = curl_init( $this->url ); + if ( !curl_setopt_array( $curlHandle, $this->curlOptions ) ) { + throw new MWException("Error setting curl options."); + } + if ( ! @curl_setopt( $curlHandle, CURLOPT_FOLLOWLOCATION, $this->followRedirects ) ) { + wfDebug("Couldn't set CURLOPT_FOLLOWLOCATION. Probably safe_mode or open_basedir is set."); + /* Continue the processing. If it were in curl_setopt_array, processing would have halted on its entry */ + } + + if ( false === curl_exec( $curlHandle ) ) { + $code = curl_error( $curlHandle ); + + if ( isset( self::$curlMessageMap[$code] ) ) { + $this->status->fatal( self::$curlMessageMap[$code] ); + } else { + $this->status->fatal( 'http-curl-error', curl_error( $curlHandle ) ); + } + } else { + $this->headerList = explode("\r\n", $this->headerText); + } + + curl_close( $curlHandle ); + + $this->parseHeader(); + $this->setStatus(); + return $this->status; + } +} + +class PhpHttpRequest extends HttpRequest { + protected $manuallyRedirect = false; + + protected function urlToTcp( $url ) { + $parsedUrl = parse_url( $url ); + + return 'tcp://' . $parsedUrl['host'] . ':' . $parsedUrl['port']; + } + + public function execute() { + parent::execute(); + + // At least on Centos 4.8 with PHP 5.1.6, using max_redirects to follow redirects + // causes a segfault + if ( version_compare( '5.1.7', phpversion(), '>' ) ) { + $this->manuallyRedirect = true; + } + + if ( $this->parsedUrl['scheme'] != 'http' ) { + $this->status->fatal( 'http-invalid-scheme', $this->parsedUrl['scheme'] ); + } + + $this->reqHeaders['Accept'] = "*/*"; + if ( $this->method == 'POST' ) { + // Required for HTTP 1.0 POSTs + $this->reqHeaders['Content-Length'] = strlen( $this->postData ); + $this->reqHeaders['Content-type'] = "application/x-www-form-urlencoded"; + } + + $options = array(); + if ( $this->proxy && !$this->noProxy ) { + $options['proxy'] = $this->urlToTCP( $this->proxy ); + $options['request_fulluri'] = true; + } + + if ( !$this->followRedirects || $this->manuallyRedirect ) { + $options['max_redirects'] = 0; + } else { + $options['max_redirects'] = $this->maxRedirects; + } + + $options['method'] = $this->method; + $options['header'] = implode("\r\n", $this->getHeaderList()); + // Note that at some future point we may want to support + // HTTP/1.1, but we'd have to write support for chunking + // in version of PHP < 5.3.1 + $options['protocol_version'] = "1.0"; + + // This is how we tell PHP we want to deal with 404s (for example) ourselves. + // Only works on 5.2.10+ + $options['ignore_errors'] = true; + + if ( $this->postData ) { + $options['content'] = $this->postData; + } + + $oldTimeout = false; + if ( version_compare( '5.2.1', phpversion(), '>' ) ) { + $oldTimeout = ini_set('default_socket_timeout', $this->timeout); + } else { + $options['timeout'] = $this->timeout; + } + + $context = stream_context_create( array( 'http' => $options ) ); + + $this->headerList = array(); + $reqCount = 0; + $url = $this->url; + do { + $again = false; + $reqCount++; + wfSuppressWarnings(); + $fh = fopen( $url, "r", false, $context ); + wfRestoreWarnings(); + if ( $fh ) { + $result = stream_get_meta_data( $fh ); + $this->headerList = $result['wrapper_data']; + $this->parseHeader(); + $url = $this->getResponseHeader("Location"); + $again = $this->manuallyRedirect && $this->followRedirects && $url + && $this->isRedirect() && $this->maxRedirects > $reqCount; + } + } while ( $again ); + + if ( $oldTimeout !== false ) { + ini_set('default_socket_timeout', $oldTimeout); + } + $this->setStatus(); + + if ( $fh === false ) { + $this->status->fatal( 'http-request-error' ); + return $this->status; + } + + if ( $result['timed_out'] ) { + $this->status->fatal( 'http-timed-out', $this->url ); + return $this->status; + } + + if($this->status->isOK()) { + while ( !feof( $fh ) ) { + $buf = fread( $fh, 8192 ); + if ( $buf === false ) { + $this->status->fatal( 'http-read-error' ); + break; + } + if ( strlen( $buf ) ) { + call_user_func( $this->callback, $fh, $buf ); + } + } + } + fclose( $fh ); + + return $this->status; + } } |