'headers']['content-length'] ) ) $r['headers']['Content-Length'] = strlen( $r['body'] ); } return $this->_dispatch_request($url, $r); } /** * Tests which transports are capable of supporting the request. * * @since 3.2.0 * @access private * * @param array $args Request arguments * @param string $url URL to Request * * @return string|false Class name for the first transport that claims to support the request. False if no transport claims to support the request. */ public function _get_first_available_transport( $args, $url = null ) { $request_order = array( 'curl', 'streams', 'fsockopen' ); // Loop over each transport on each HTTP request looking for one which will serve this request's needs foreach ( $request_order as $transport ) { $class = 'WP_HTTP_' . $transport; // Check to see if this transport is a possibility, calls the transport statically if ( !call_user_func( array( $class, 'test' ), $args, $url ) ) continue; return $class; } return false; } /** * Dispatches a HTTP request to a supporting transport. * * Tests each transport in order to find a transport which matches the request arguments. * Also caches the transport instance to be used later. * * The order for blocking requests is cURL, Streams, and finally Fsockopen. * The order for non-blocking requests is cURL, Streams and Fsockopen(). * * There are currently issues with "localhost" not resolving correctly with DNS. This may cause * an error "failed to open stream: A connection attempt failed because the connected party did * not properly respond after a period of time, or established connection failed because [the] * connected host has failed to respond." * * @since 3.2.0 * @access private * * @param string $url URL to Request * @param array $args Request arguments * @return array|object Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error */ private function _dispatch_request( $url, $args ) { static $transports = array(); $class = $this->_get_first_available_transport( $args, $url ); if ( !$class ) return new WP_Error( 'http_failure', __( 'There are no HTTP transports available which can complete the requested request.' ) ); // Transport claims to support request, instantiate it and give it a whirl. if ( empty( $transports[$class] ) ) $transports[$class] = new $class; $response = $transports[$class]->request( $url, $args ); do_action( 'http_api_debug', $response, 'response', $class, $args, $url ); if ( is_wp_error( $response ) ) return $response; return apply_filters( 'http_response', $response, $args, $url ); } /** * Uses the POST HTTP method. * * Used for sending data that is expected to be in the body. * * @access public * @since 2.7.0 * * @param string $url URI resource. * @param str|array $args Optional. Override the defaults. * @return array|object Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error */ function post($url, $args = array()) { $defaults = array('method' => 'POST'); $r = wp_parse_args( $args, $defaults ); return $this->request($url, $r); } /** * Uses the GET HTTP method. * * Used for sending data that is expected to be in the body. * * @access public * @since 2.7.0 * * @param string $url URI resource. * @param str|array $args Optional. Override the defaults. * @return array|object Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error */ function get($url, $args = array()) { $defaults = array('method' => 'GET'); $r = wp_parse_args( $args, $defaults ); return $this->request($url, $r); } /** * Uses the HEAD HTTP method. * * Used for sending data that is expected to be in the body. * * @access public * @since 2.7.0 * * @param string $url URI resource. * @param str|array $args Optional. Override the defaults. * @return array|object Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error */ function head($url, $args = array()) { $defaults = array('method' => 'HEAD'); $r = wp_parse_args( $args, $defaults ); return $this->request($url, $r); } /** * Parses the responses and splits the parts into headers and body. * * @access public * @static * @since 2.7.0 * * @param string $strResponse The full response string * @return array Array with 'headers' and 'body' keys. */ function processResponse($strResponse) { $res = explode("\r\n\r\n", $strResponse, 2); return array('headers' => $res[0], 'body' => isset($res[1]) ? $res[1] : ''); } /** * Transform header string into an array. * * If an array is given then it is assumed to be raw header data with numeric keys with the * headers as the values. No headers must be passed that were already processed. * * @access public * @static * @since 2.7.0 * * @param string|array $headers * @return array Processed string headers. If duplicate headers are encountered, * Then a numbered array is returned as the value of that header-key. */ public static function processHeaders($headers) { // split headers, one per array element if ( is_string($headers) ) { // tolerate line terminator: CRLF = LF (RFC 2616 19.3) $headers = str_replace("\r\n", "\n", $headers); // unfold folded header fields. LWS = [CRLF] 1*( SP | HT ) , (RFC 2616 2.2) $headers = preg_replace('/\n[ \t]/', ' ', $headers); // create the headers array $headers = explode("\n", $headers); } $response = array('code' => 0, 'message' => ''); // If a redirection has taken place, The headers for each page request may have been passed. // In this case, determine the final HTTP header and parse from there. for ( $i = count($headers)-1; $i >= 0; $i-- ) { if ( !empty($headers[$i]) && false === strpos($headers[$i], ':') ) { $headers = array_splice($headers, $i); break; } } $cookies = array(); $newheaders = array(); foreach ( (array) $headers as $tempheader ) { if ( empty($tempheader) ) continue; if ( false === strpos($tempheader, ':') ) { $stack = explode(' ', $tempheader, 3); $stack[] = ''; list( , $response['code'], $response['message']) = $stack; continue; } list($key, $value) = explode(':', $tempheader, 2); if ( !empty( $value ) ) { $key = strtolower( $key ); if ( isset( $newheaders[$key] ) ) { if ( !is_array($newheaders[$key]) ) $newheaders[$key] = array($newheaders[$key]); $newheaders[$key][] = trim( $value ); } else { $newheaders[$key] = trim( $value ); } if ( 'set-cookie' == $key ) $cookies[] = new WP_Http_Cookie( $value ); } } return array('response' => $response, 'headers' => $newheaders, 'cookies' => $cookies); } /** * Takes the arguments for a ::request() and checks for the cookie array. * * If it's found, then it's assumed to contain WP_Http_Cookie objects, which are each parsed * into strings and added to the Cookie: header (within the arguments array). Edits the array by * reference. * * @access public * @version 2.8.0 * @static * * @param array $r Full array of args passed into ::request() */ public static function buildCookieHeader( &$r ) { if ( ! empty($r['cookies']) ) { $cookies_header = ''; foreach ( (array) $r['cookies'] as $cookie ) { $cookies_header .= $cookie->getHeaderValue() . '; '; } $cookies_header = substr( $cookies_header, 0, -2 ); $r['headers']['cookie'] = $cookies_header; } } /** * Decodes chunk transfer-encoding, based off the HTTP 1.1 specification. * * Based off the HTTP http_encoding_dechunk function. Does not support UTF-8. Does not support * returning footer headers. Shouldn't be too difficult to support it though. * * @todo Add support for footer chunked headers. * @access public * @since 2.7.0 * @static * * @param string $body Body content * @return string Chunked decoded body on success or raw body on failure. */ function chunkTransferDecode($body) { $body = str_replace(array("\r\n", "\r"), "\n", $body); // The body is not chunked encoding or is malformed. if ( ! preg_match( '/^[0-9a-f]+(\s|\n)+/mi', trim($body) ) ) return $body; $parsedBody = ''; //$parsedHeaders = array(); Unsupported while ( true ) { $hasChunk = (bool) preg_match( '/^([0-9a-f]+)(\s|\n)+/mi', $body, $match ); if ( $hasChunk ) { if ( empty( $match[1] ) ) return $body; $length = hexdec( $match[1] ); $chunkLength = strlen( $match[0] ); $strBody = substr($body, $chunkLength, $length); $parsedBody .= $strBody; $body = ltrim(str_replace(array($match[0], $strBody), '', $body), "\n"); if ( "0" == trim($body) ) return $parsedBody; // Ignore footer headers. } else { return $body; } } } /** * Block requests through the proxy. * * Those who are behind a proxy and want to prevent access to certain hosts may do so. This will * prevent plugins from working and core functionality, if you don't include api.wordpress.org. * * You block external URL requests by defining WP_HTTP_BLOCK_EXTERNAL as true in your wp-config.php * file and this will only allow localhost and your blog to make requests. The constant * WP_ACCESSIBLE_HOSTS will allow additional hosts to go through for requests. The format of the * WP_ACCESSIBLE_HOSTS constant is a comma separated list of hostnames to allow, wildcard domains * are supported, eg *.wordpress.org will allow for all subdomains of wordpress.org to be contacted. * * @since 2.8.0 * @link http://core.trac.wordpress.org/ticket/8927 Allow preventing external requests. * @link http://core.trac.wordpress.org/ticket/14636 Allow wildcard domains in WP_ACCESSIBLE_HOSTS * * @param string $uri URI of url. * @return bool True to block, false to allow. */ function block_request($uri) { // We don't need to block requests, because nothing is blocked. if ( ! defined( 'WP_HTTP_BLOCK_EXTERNAL' ) || ! WP_HTTP_BLOCK_EXTERNAL ) return false; // parse_url() only handles http, https type URLs, and will emit E_WARNING on failure. // This will be displayed on blogs, which is not reasonable. $check = @parse_url($uri); /* Malformed URL, can not process, but this could mean ssl, so let through anyway. * * This isn't very security sound. There are instances where a hacker might attempt * to bypass the proxy and this check. However, the reason for this behavior is that * WordPress does not do any checking currently for non-proxy requests, so it is keeps with * the default unsecure nature of the HTTP request. */ if ( $check === false ) return false; $home = parse_url( get_option('siteurl') ); // Don't block requests back to ourselves by default if ( $check['host'] == 'localhost' || $check['host'] == $home['host'] ) return apply_filters('block_local_requests', false); if ( !defined('WP_ACCESSIBLE_HOSTS') ) return true; static $accessible_hosts; static $wildcard_regex = false; if ( null == $accessible_hosts ) { $accessible_hosts = preg_split('|,\s*|', WP_ACCESSIBLE_HOSTS); if ( false !== strpos(WP_ACCESSIBLE_HOSTS, '*') ) { $wildcard_regex = array(); foreach ( $accessible_hosts as $host ) $wildcard_regex[] = str_replace('\*', '[\w.]+?', preg_quote($host, '/')); $wildcard_regex = '/^(' . implode('|', $wildcard_regex) . ')$/i'; } } if ( !empty($wildcard_regex) ) return !preg_match($wildcard_regex, $check['host']); else return !in_array( $check['host'], $accessible_hosts ); //Inverse logic, If its in the array, then we can't access it. } } /** * HTTP request method uses fsockopen function to retrieve the url. * * This would be the preferred method, but the fsockopen implementation has the most overhead of all * the HTTP transport implementations. * * @package WordPress * @subpackage HTTP * @since 2.7.0 */ class WP_Http_Fsockopen { /** * Send a HTTP request to a URI using fsockopen(). * * Does not support non-blocking mode. * * @see WP_Http::request For default options descriptions. * * @since 2.7 * @access public * @param string $url URI resource. * @param str|array $args Optional. Override the defaults. * @return array 'headers', 'body', 'response', 'cookies' and 'filename' keys. */ function request($url, $args = array()) { $defaults = array( 'method' => 'GET', 'timeout' => 5, 'redirection' => 5, 'httpversion' => '1.0', 'blocking' => true, 'headers' => array(), 'body' => null, 'cookies' => array() ); $r = wp_parse_args( $args, $defaults ); if ( isset($r['headers']['User-Agent']) ) { $r['user-agent'] = $r['headers']['User-Agent']; unset($r['headers']['User-Agent']); } else if ( isset($r['headers']['user-agent']) ) { $r['user-agent'] = $r['headers']['user-agent']; unset($r['headers']['user-agent']); } // Construct Cookie: header if any cookies are set WP_Http::buildCookieHeader( $r ); $iError = null; // Store error number $strError = null; // Store error string $arrURL = parse_url($url); $fsockopen_host = $arrURL['host']; $secure_transport = false; if ( ! isset( $arrURL['port'] ) ) { if ( ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' ) && extension_loaded('openssl') ) { $fsockopen_host = "ssl://$fsockopen_host"; $arrURL['port'] = 443; $secure_transport = true; } else { $arrURL['port'] = 80; } } //fsockopen has issues with 'localhost' with IPv6 with certain versions of PHP, It attempts to connect to ::1, // which fails when the server is not set up for it. For compatibility, always connect to the IPv4 address. if ( 'localhost' == strtolower($fsockopen_host) ) $fsockopen_host = '127.0.0.1'; // There are issues with the HTTPS and SSL protocols that cause errors that can be safely // ignored and should be ignored. if ( true === $secure_transport ) $error_reporting = error_reporting(0); $startDelay = time(); $proxy = new WP_HTTP_Proxy(); if ( !WP_DEBUG ) { if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) $handle = @fsockopen( $proxy->host(), $proxy->port(), $iError, $strError, $r['timeout'] ); else $handle = @fsockopen( $fsockopen_host, $arrURL['port'], $iError, $strError, $r['timeout'] ); } else { if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) $handle = fsockopen( $proxy->host(), $proxy->port(), $iError, $strError, $r['timeout'] ); else $handle = fsockopen( $fsockopen_host, $arrURL['port'], $iError, $strError, $r['timeout'] ); } $endDelay = time(); // If the delay is greater than the timeout then fsockopen shouldn't be used, because it will // cause a long delay. $elapseDelay = ($endDelay-$startDelay) > $r['timeout']; if ( true === $elapseDelay ) add_option( 'disable_fsockopen', $endDelay, null, true ); if ( false === $handle ) return new WP_Error('http_request_failed', $iError . ': ' . $strError); $timeout = (int) floor( $r['timeout'] ); $utimeout = $timeout == $r['timeout'] ? 0 : 1000000 * $r['timeout'] % 1000000; stream_set_timeout( $handle, $timeout, $utimeout ); if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) //Some proxies require full URL in this field. $requestPath = $url; else $requestPath = $arrURL['path'] . ( isset($arrURL['query']) ? '?' . $arrURL['query'] : '' ); if ( empty($requestPath) ) $requestPath .= '/'; $strHeaders = strtoupper($r['method']) . ' ' . $requestPath . ' HTTP/' . $r['httpversion'] . "\r\n"; if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) $strHeaders .= 'Host: ' . $arrURL['host'] . ':' . $arrURL['port'] . "\r\n"; else $strHeaders .= 'Host: ' . $arrURL['host'] . "\r\n"; if ( isset($r['user-agent']) ) $strHeaders .= 'User-agent: ' . $r['user-agent'] . "\r\n"; if ( is_array($r['headers']) ) { foreach ( (array) $r['headers'] as $header => $headerValue ) $strHeaders .= $header . ': ' . $headerValue . "\r\n"; } else { $strHeaders .= $r['headers']; } if ( $proxy->use_authentication() ) $strHeaders .= $proxy->authentication_header() . "\r\n"; $strHeaders .= "\r\n"; if ( ! is_null($r['body']) ) $strHeaders .= $r['body']; fwrite($handle, $strHeaders); if ( ! $r['blocking'] ) { fclose($handle); return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); } $strResponse = ''; $bodyStarted = false; // If streaming to a file setup the file handle if ( $r['stream'] ) { if ( ! WP_DEBUG ) $stream_handle = @fopen( $r['filename'], 'w+' ); else $stream_handle = fopen( $r['filename'], 'w+' ); if ( ! $stream_handle ) return new WP_Error( 'http_request_failed', sprintf( __( 'Could not open handle for fopen() to %s' ), $r['filename'] ) ); while ( ! feof($handle) ) { $block = fread( $handle, 4096 ); if ( $bodyStarted ) { fwrite( $stream_handle, $block ); } else { $strResponse .= $block; if ( strpos( $strResponse, "\r\n\r\n" ) ) { $process = WP_Http::processResponse( $strResponse ); $bodyStarted = true; fwrite( $stream_handle, $process['body'] ); unset( $strResponse ); $process['body'] = ''; } } } fclose( $stream_handle ); } else { while ( ! feof($handle) ) $strResponse .= fread( $handle, 4096 ); $process = WP_Http::processResponse( $strResponse ); unset( $strResponse ); } fclose( $handle ); if ( true === $secure_transport ) error_reporting($error_reporting); $arrHeaders = WP_Http::processHeaders( $process['headers'] ); // If location is found, then assume redirect and redirect to location. if ( isset($arrHeaders['headers']['location']) && 0 !== $r['_redirection'] ) { if ( $r['redirection']-- > 0 ) { return $this->request($arrHeaders['headers']['location'], $r); } else { return new WP_Error('http_request_failed', __('Too many redirects.')); } } // If the body was chunk encoded, then decode it. if ( ! empty( $process['body'] ) && isset( $arrHeaders['headers']['transfer-encoding'] ) && 'chunked' == $arrHeaders['headers']['transfer-encoding'] ) $process['body'] = WP_Http::chunkTransferDecode($process['body']); if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($arrHeaders['headers']) ) $process['body'] = WP_Http_Encoding::decompress( $process['body'] ); return array( 'headers' => $arrHeaders['headers'], 'body' => $process['body'], 'response' => $arrHeaders['response'], 'cookies' => $arrHeaders['cookies'], 'filename' => $r['filename'] ); } /** * Whether this class can be used for retrieving an URL. * * @since 2.7.0 * @static * @return boolean False means this class can not be used, true means it can. */ public static function test( $args = array() ) { if ( ! function_exists( 'fsockopen' ) ) return false; if ( false !== ($option = get_option( 'disable_fsockopen' )) && time()-$option < 43200 ) // 12 hours return false; $is_ssl = isset( $args['ssl'] ) && $args['ssl']; if ( $is_ssl && ! extension_loaded( 'openssl' ) ) return false; return apply_filters( 'use_fsockopen_transport', true, $args ); } } /** * HTTP request method uses Streams to retrieve the url. * * Requires PHP 5.0+ and uses fopen with stream context. Requires that 'allow_url_fopen' PHP setting * to be enabled. * * Second preferred method for getting the URL, for PHP 5. * * @package WordPress * @subpackage HTTP * @since 2.7.0 */ class WP_Http_Streams { /** * Send a HTTP request to a URI using streams with fopen(). * * @access public * @since 2.7.0 * * @param string $url * @param str|array $args Optional. Override the defaults. * @return array 'headers', 'body', 'response', 'cookies' and 'filename' keys. */ function request($url, $args = array()) { $defaults = array( 'method' => 'GET', 'timeout' => 5, 'redirection' => 5, 'httpversion' => '1.0', 'blocking' => true, 'headers' => array(), 'body' => null, 'cookies' => array() ); $r = wp_parse_args( $args, $defaults ); if ( isset($r['headers']['User-Agent']) ) { $r['user-agent'] = $r['headers']['User-Agent']; unset($r['headers']['User-Agent']); } else if ( isset($r['headers']['user-agent']) ) { $r['user-agent'] = $r['headers']['user-agent']; unset($r['headers']['user-agent']); } // Construct Cookie: header if any cookies are set WP_Http::buildCookieHeader( $r ); $arrURL = parse_url($url); if ( false === $arrURL ) return new WP_Error('http_request_failed', sprintf(__('Malformed URL: %s'), $url)); if ( 'http' != $arrURL['scheme'] && 'https' != $arrURL['scheme'] ) $url = preg_replace('|^' . preg_quote($arrURL['scheme'], '|') . '|', 'http', $url); // Convert Header array to string. $strHeaders = ''; if ( is_array( $r['headers'] ) ) foreach ( $r['headers'] as $name => $value ) $strHeaders .= "{$name}: $value\r\n"; else if ( is_string( $r['headers'] ) ) $strHeaders = $r['headers']; $is_local = isset($args['local']) && $args['local']; $ssl_verify = isset($args['sslverify']) && $args['sslverify']; if ( $is_local ) $ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify); elseif ( ! $is_local ) $ssl_verify = apply_filters('https_ssl_verify', $ssl_verify); $arrContext = array('http' => array( 'method' => strtoupper($r['method']), 'user_agent' => $r['user-agent'], 'max_redirects' => $r['redirection'] + 1, // See #11557 'protocol_version' => (float) $r['httpversion'], 'header' => $strHeaders, 'ignore_errors' => true, // Return non-200 requests. 'timeout' => $r['timeout'], 'ssl' => array( 'verify_peer' => $ssl_verify, 'verify_host' => $ssl_verify ) ) ); $proxy = new WP_HTTP_Proxy(); if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { $arrContext['http']['proxy'] = 'tcp://' . $proxy->host() . ':' . $proxy->port(); $arrContext['http']['request_fulluri'] = true; // We only support Basic authentication so this will only work if that is what your proxy supports. if ( $proxy->use_authentication() ) $arrContext['http']['header'] .= $proxy->authentication_header() . "\r\n"; } if ( ! empty($r['body'] ) ) $arrContext['http']['content'] = $r['body']; $context = stream_context_create($arrContext); if ( !WP_DEBUG ) $handle = @fopen($url, 'r', false, $context); else $handle = fopen($url, 'r', false, $context); if ( ! $handle ) return new WP_Error('http_request_failed', sprintf(__('Could not open handle for fopen() to %s'), $url)); $timeout = (int) floor( $r['timeout'] ); $utimeout = $timeout == $r['timeout'] ? 0 : 1000000 * $r['timeout'] % 1000000; stream_set_timeout( $handle, $timeout, $utimeout ); if ( ! $r['blocking'] ) { stream_set_blocking($handle, 0); fclose($handle); return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); } if ( $r['stream'] ) { if ( ! WP_DEBUG ) $stream_handle = @fopen( $r['filename'], 'w+' ); else $stream_handle = fopen( $r['filename'], 'w+' ); if ( ! $stream_handle ) return new WP_Error( 'http_request_failed', sprintf( __( 'Could not open handle for fopen() to %s' ), $r['filename'] ) ); stream_copy_to_stream( $handle, $stream_handle ); fclose( $stream_handle ); $strResponse = ''; } else { $strResponse = stream_get_contents( $handle ); } $meta = stream_get_meta_data( $handle ); fclose( $handle ); $processedHeaders = array(); if ( isset( $meta['wrapper_data']['headers'] ) ) $processedHeaders = WP_Http::processHeaders($meta['wrapper_data']['headers']); else $processedHeaders = WP_Http::processHeaders($meta['wrapper_data']); // Streams does not provide an error code which we can use to see why the request stream stopped. // We can however test to see if a location header is present and return based on that. if ( isset($processedHeaders['headers']['location']) && 0 !== $args['_redirection'] ) return new WP_Error('http_request_failed', __('Too many redirects.')); if ( ! empty( $strResponse ) && isset( $processedHeaders['headers']['transfer-encoding'] ) && 'chunked' == $processedHeaders['headers']['transfer-encoding'] ) $strResponse = WP_Http::chunkTransferDecode($strResponse); if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($processedHeaders['headers']) ) $strResponse = WP_Http_Encoding::decompress( $strResponse ); return array( 'headers' => $processedHeaders['headers'], 'body' => $strResponse, 'response' => $processedHeaders['response'], 'cookies' => $processedHeaders['cookies'], 'filename' => $r['filename'] ); } /** * Whether this class can be used for retrieving an URL. * * @static * @access public * @since 2.7.0 * * @return boolean False means this class can not be used, true means it can. */ public static function test( $args = array() ) { if ( ! function_exists( 'fopen' ) ) return false; if ( ! function_exists( 'ini_get' ) || true != ini_get( 'allow_url_fopen' ) ) return false; $is_ssl = isset( $args['ssl'] ) && $args['ssl']; if ( $is_ssl && ! extension_loaded( 'openssl' ) ) return false; return apply_filters( 'use_streams_transport', true, $args ); } } /** * HTTP request method uses Curl extension to retrieve the url. * * Requires the Curl extension to be installed. * * @package WordPress * @subpackage HTTP * @since 2.7 */ class WP_Http_Curl { /** * Temporary header storage for use with streaming to a file. * * @since 3.2.0 * @access private * @var string */ private $headers = ''; /** * Send a HTTP request to a URI using cURL extension. * * @access public * @since 2.7.0 * * @param string $url * @param str|array $args Optional. Override the defaults. * @return array 'headers', 'body', 'response', 'cookies' and 'filename' keys. */ function request($url, $args = array()) { $defaults = array( 'method' => 'GET', 'timeout' => 5, 'redirection' => 5, 'httpversion' => '1.0', 'blocking' => true, 'headers' => array(), 'body' => null, 'cookies' => array() ); $r = wp_parse_args( $args, $defaults ); if ( isset($r['headers']['User-Agent']) ) { $r['user-agent'] = $r['headers']['User-Agent']; unset($r['headers']['User-Agent']); } else if ( isset($r['headers']['user-agent']) ) { $r['user-agent'] = $r['headers']['user-agent']; unset($r['headers']['user-agent']); } // Construct Cookie: header if any cookies are set. WP_Http::buildCookieHeader( $r ); $handle = curl_init(); // cURL offers really easy proxy support. $proxy = new WP_HTTP_Proxy(); if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { curl_setopt( $handle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP ); curl_setopt( $handle, CURLOPT_PROXY, $proxy->host() ); curl_setopt( $handle, CURLOPT_PROXYPORT, $proxy->port() ); if ( $proxy->use_authentication() ) { curl_setopt( $handle, CURLOPT_PROXYAUTH, CURLAUTH_ANY ); curl_setopt( $handle, CURLOPT_PROXYUSERPWD, $proxy->authentication() ); } } $is_local = isset($args['local']) && $args['local']; $ssl_verify = isset($args['sslverify']) && $args['sslverify']; if ( $is_local ) $ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify); elseif ( ! $is_local ) $ssl_verify = apply_filters('https_ssl_verify', $ssl_verify); // CURLOPT_TIMEOUT and CURLOPT_CONNECTTIMEOUT expect integers. Have to use ceil since // a value of 0 will allow an unlimited timeout. $timeout = (int) ceil( $r['timeout'] ); curl_setopt( $handle, CURLOPT_CONNECTTIMEOUT, $timeout ); curl_setopt( $handle, CURLOPT_TIMEOUT, $timeout ); curl_setopt( $handle, CURLOPT_URL, $url); curl_setopt( $handle, CURLOPT_RETURNTRANSFER, true ); curl_setopt( $handle, CURLOPT_SSL_VERIFYHOST, ( $ssl_verify === true ) ? 2 : false ); curl_setopt( $handle, CURLOPT_SSL_VERIFYPEER, $ssl_verify ); curl_setopt( $handle, CURLOPT_USERAGENT, $r['user-agent'] ); curl_setopt( $handle, CURLOPT_MAXREDIRS, $r['redirection'] ); switch ( $r['method'] ) { case 'HEAD': curl_setopt( $handle, CURLOPT_NOBODY, true ); break; case 'POST': curl_setopt( $handle, CURLOPT_POST, true ); curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] ); break; case 'PUT': curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, 'PUT' ); curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] ); break; } if ( true === $r['blocking'] ) curl_setopt( $handle, CURLOPT_HEADERFUNCTION, array( &$this, 'stream_headers' ) ); curl_setopt( $handle, CURLOPT_HEADER, false ); // If streaming to a file open a file handle, and setup our curl streaming handler if ( $r['stream'] ) { if ( ! WP_DEBUG ) $stream_handle = @fopen( $r['filename'], 'w+' ); else $stream_handle = fopen( $r['filename'], 'w+' ); if ( ! $stream_handle ) return new WP_Error( 'http_request_failed', sprintf( __( 'Could not open handle for fopen() to %s' ), $r['filename'] ) ); curl_setopt( $handle, CURLOPT_FILE, $stream_handle ); } // The option doesn't work with safe mode or when open_basedir is set. if ( !ini_get('safe_mode') && !ini_get('open_basedir') && 0 !== $r['_redirection'] ) curl_setopt( $handle, CURLOPT_FOLLOWLOCATION, true ); if ( !empty( $r['headers'] ) ) { // cURL expects full header strings in each element $headers = array(); foreach ( $r['headers'] as $name => $value ) { $headers[] = "{$name}: $value"; } curl_setopt( $handle, CURLOPT_HTTPHEADER, $headers ); } if ( $r['httpversion'] == '1.0' ) curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0 ); else curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1 ); // Cookies are not handled by the HTTP API currently. Allow for plugin authors to handle it // themselves... Although, it is somewhat pointless without some reference. do_action_ref_array( 'http_api_curl', array(&$handle) ); // We don't need to return the body, so don't. Just execute request and return. if ( ! $r['blocking'] ) { curl_exec( $handle ); curl_close( $handle ); return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); } $theResponse = curl_exec( $handle ); $theBody = ''; $theHeaders = WP_Http::processHeaders( $this->headers ); if ( strlen($theResponse) > 0 && ! is_bool( $theResponse ) ) // is_bool: when using $args['stream'], curl_exec will return (bool)true $theBody = $theResponse; // If no response, and It's not a HEAD request with valid headers returned if ( 0 == strlen($theResponse) && ('HEAD' != $args['method'] || empty($this->headers)) ) { if ( $curl_error = curl_error($handle) ) return new WP_Error('http_request_failed', $curl_error); if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array(301, 302) ) ) return new WP_Error('http_request_failed', __('Too many redirects.')); } $this->headers = ''; $response = array(); $response['code'] = curl_getinfo( $handle, CURLINFO_HTTP_CODE ); $response['message'] = get_status_header_desc($response['code']); curl_close( $handle ); if ( $r['stream'] ) fclose( $stream_handle ); // See #11305 - When running under safe mode, redirection is disabled above. Handle it manually. if ( ! empty( $theHeaders['headers']['location'] ) && ( ini_get( 'safe_mode' ) || ini_get( 'open_basedir' ) ) && 0 !== $r['_redirection'] ) { if ( $r['redirection']-- > 0 ) { return $this->request( $theHeaders['headers']['location'], $r ); } else { return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) ); } } if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders['headers']) ) $theBody = WP_Http_Encoding::decompress( $theBody ); return array( 'headers' => $theHeaders['headers'], 'body' => $theBody, 'response' => $response, 'cookies' => $theHeaders['cookies'], 'filename' => $r['filename'] ); } /** * Grab the headers of the cURL request * * Each header is sent individually to this callback, so we append to the $header property for temporary storage * * @since 3.2.0 * @access private * @return int */ private function stream_headers( $handle, $headers ) { $this->headers .= $headers; return strlen( $headers ); } /** * Whether this class can be used for retrieving an URL. * * @static * @since 2.7.0 * * @return boolean False means this class can not be used, true means it can. */ public static function test( $args = array() ) { if ( ! function_exists( 'curl_init' ) || ! function_exists( 'curl_exec' ) ) return false; $is_ssl = isset( $args['ssl'] ) && $args['ssl']; if ( $is_ssl ) { $curl_version = curl_version(); if ( ! (CURL_VERSION_SSL & $curl_version['features']) ) // Does this cURL version support SSL requests? return false; } return apply_filters( 'use_curl_transport', true, $args ); } } /** * Adds Proxy support to the WordPress HTTP API. * * There are caveats to proxy support. It requires that defines be made in the wp-config.php file to * enable proxy support. There are also a few filters that plugins can hook into for some of the * constants. * * Please note that only BASIC authentication is supported by most transports. * cURL MAY support more methods (such as NTLM authentication) depending on your environment. * * The constants are as follows: *
    *
  1. WP_PROXY_HOST - Enable proxy support and host for connecting.
  2. *
  3. WP_PROXY_PORT - Proxy port for connection. No default, must be defined.
  4. *
  5. WP_PROXY_USERNAME - Proxy username, if it requires authentication.
  6. *
  7. WP_PROXY_PASSWORD - Proxy password, if it requires authentication.
  8. *
  9. WP_PROXY_BYPASS_HOSTS - Will prevent the hosts in this list from going through the proxy. * You do not need to have localhost and the blog host in this list, because they will not be passed * through the proxy. The list should be presented in a comma separated list, wildcards using * are supported, eg. *.wordpress.org
  10. *
* * An example can be as seen below. * * define('WP_PROXY_HOST', '192.168.84.101'); * define('WP_PROXY_PORT', '8080'); * define('WP_PROXY_BYPASS_HOSTS', 'localhost, www.example.com, *.wordpress.org'); * * * @link http://core.trac.wordpress.org/ticket/4011 Proxy support ticket in WordPress. * @link http://core.trac.wordpress.org/ticket/14636 Allow wildcard domains in WP_PROXY_BYPASS_HOSTS * @since 2.8 */ class WP_HTTP_Proxy { /** * Whether proxy connection should be used. * * @since 2.8 * @use WP_PROXY_HOST * @use WP_PROXY_PORT * * @return bool */ function is_enabled() { return defined('WP_PROXY_HOST') && defined('WP_PROXY_PORT'); } /** * Whether authentication should be used. * * @since 2.8 * @use WP_PROXY_USERNAME * @use WP_PROXY_PASSWORD * * @return bool */ function use_authentication() { return defined('WP_PROXY_USERNAME') && defined('WP_PROXY_PASSWORD'); } /** * Retrieve the host for the proxy server. * * @since 2.8 * * @return string */ function host() { if ( defined('WP_PROXY_HOST') ) return WP_PROXY_HOST; return ''; } /** * Retrieve the port for the proxy server. * * @since 2.8 * * @return string */ function port() { if ( defined('WP_PROXY_PORT') ) return WP_PROXY_PORT; return ''; } /** * Retrieve the username for proxy authentication. * * @since 2.8 * * @return string */ function username() { if ( defined('WP_PROXY_USERNAME') ) return WP_PROXY_USERNAME; return ''; } /** * Retrieve the password for proxy authentication. * * @since 2.8 * * @return string */ function password() { if ( defined('WP_PROXY_PASSWORD') ) return WP_PROXY_PASSWORD; return ''; } /** * Retrieve authentication string for proxy authentication. * * @since 2.8 * * @return string */ function authentication() { return $this->username() . ':' . $this->password(); } /** * Retrieve header string for proxy authentication. * * @since 2.8 * * @return string */ function authentication_header() { return 'Proxy-Authorization: Basic ' . base64_encode( $this->authentication() ); } /** * Whether URL should be sent through the proxy server. * * We want to keep localhost and the blog URL from being sent through the proxy server, because * some proxies can not handle this. We also have the constant available for defining other * hosts that won't be sent through the proxy. * * @uses WP_PROXY_BYPASS_HOSTS * @since 2.8.0 * * @param string $uri URI to check. * @return bool True, to send through the proxy and false if, the proxy should not be used. */ function send_through_proxy( $uri ) { // parse_url() only handles http, https type URLs, and will emit E_WARNING on failure. // This will be displayed on blogs, which is not reasonable. $check = @parse_url($uri); // Malformed URL, can not process, but this could mean ssl, so let through anyway. if ( $check === false ) return true; $home = parse_url( get_option('siteurl') ); if ( $check['host'] == 'localhost' || $check['host'] == $home['host'] ) return false; if ( !defined('WP_PROXY_BYPASS_HOSTS') ) return true; static $bypass_hosts; static $wildcard_regex = false; if ( null == $bypass_hosts ) { $bypass_hosts = preg_split('|,\s*|', WP_PROXY_BYPASS_HOSTS); if ( false !== strpos(WP_PROXY_BYPASS_HOSTS, '*') ) { $wildcard_regex = array(); foreach ( $bypass_hosts as $host ) $wildcard_regex[] = str_replace('\*', '[\w.]+?', preg_quote($host, '/')); $wildcard_regex = '/^(' . implode('|', $wildcard_regex) . ')$/i'; } } if ( !empty($wildcard_regex) ) return !preg_match($wildcard_regex, $check['host']); else return !in_array( $check['host'], $bypass_hosts ); } } /** * Internal representation of a single cookie. * * Returned cookies are represented using this class, and when cookies are set, if they are not * already a WP_Http_Cookie() object, then they are turned into one. * * @todo The WordPress convention is to use underscores instead of camelCase for function and method * names. Need to switch to use underscores instead for the methods. * * @package WordPress * @subpackage HTTP * @since 2.8.0 */ class WP_Http_Cookie { /** * Cookie name. * * @since 2.8.0 * @var string */ var $name; /** * Cookie value. * * @since 2.8.0 * @var string */ var $value; /** * When the cookie expires. * * @since 2.8.0 * @var string */ var $expires; /** * Cookie URL path. * * @since 2.8.0 * @var string */ var $path; /** * Cookie Domain. * * @since 2.8.0 * @var string */ var $domain; /** * Sets up this cookie object. * * The parameter $data should be either an associative array containing the indices names below * or a header string detailing it. * * If it's an array, it should include the following elements: *
    *
  1. Name
  2. *
  3. Value - should NOT be urlencoded already.
  4. *
  5. Expires - (optional) String or int (UNIX timestamp).
  6. *
  7. Path (optional)
  8. *
  9. Domain (optional)
  10. *
* * @access public * @since 2.8.0 * * @param string|array $data Raw cookie data. */ function __construct( $data ) { if ( is_string( $data ) ) { // Assume it's a header string direct from a previous request $pairs = explode( ';', $data ); // Special handling for first pair; name=value. Also be careful of "=" in value $name = trim( substr( $pairs[0], 0, strpos( $pairs[0], '=' ) ) ); $value = substr( $pairs[0], strpos( $pairs[0], '=' ) + 1 ); $this->name = $name; $this->value = urldecode( $value ); array_shift( $pairs ); //Removes name=value from items. // Set everything else as a property foreach ( $pairs as $pair ) { $pair = rtrim($pair); if ( empty($pair) ) //Handles the cookie ending in ; which results in a empty final pair continue; list( $key, $val ) = strpos( $pair, '=' ) ? explode( '=', $pair ) : array( $pair, '' ); $key = strtolower( trim( $key ) ); if ( 'expires' == $key ) $val = strtotime( $val ); $this->$key = $val; } } else { if ( !isset( $data['name'] ) ) return false; // Set properties based directly on parameters $this->name = $data['name']; $this->value = isset( $data['value'] ) ? $data['value'] : ''; $this->path = isset( $data['path'] ) ? $data['path'] : ''; $this->domain = isset( $data['domain'] ) ? $data['domain'] : ''; if ( isset( $data['expires'] ) ) $this->expires = is_int( $data['expires'] ) ? $data['expires'] : strtotime( $data['expires'] ); else $this->expires = null; } } /** * Confirms that it's OK to send this cookie to the URL checked against. * * Decision is based on RFC 2109/2965, so look there for details on validity. * * @access public * @since 2.8.0 * * @param string $url URL you intend to send this cookie to * @return boolean TRUE if allowed, FALSE otherwise. */ function test( $url ) { // Expires - if expired then nothing else matters if ( time() > $this->expires ) return false; // Get details on the URL we're thinking about sending to $url = parse_url( $url ); $url['port'] = isset( $url['port'] ) ? $url['port'] : 80; $url['path'] = isset( $url['path'] ) ? $url['path'] : '/'; // Values to use for comparison against the URL $path = isset( $this->path ) ? $this->path : '/'; $port = isset( $this->port ) ? $this->port : 80; $domain = isset( $this->domain ) ? strtolower( $this->domain ) : strtolower( $url['host'] ); if ( false === stripos( $domain, '.' ) ) $domain .= '.local'; // Host - very basic check that the request URL ends with the domain restriction (minus leading dot) $domain = substr( $domain, 0, 1 ) == '.' ? substr( $domain, 1 ) : $domain; if ( substr( $url['host'], -strlen( $domain ) ) != $domain ) return false; // Port - supports "port-lists" in the format: "80,8000,8080" if ( !in_array( $url['port'], explode( ',', $port) ) ) return false; // Path - request path must start with path restriction if ( substr( $url['path'], 0, strlen( $path ) ) != $path ) return false; return true; } /** * Convert cookie name and value back to header string. * * @access public * @since 2.8.0 * * @return string Header encoded cookie name and value. */ function getHeaderValue() { if ( empty( $this->name ) || empty( $this->value ) ) return ''; return $this->name . '=' . urlencode( $this->value ); } /** * Retrieve cookie header for usage in the rest of the WordPress HTTP API. * * @access public * @since 2.8.0 * * @return string */ function getFullHeader() { return 'Cookie: ' . $this->getHeaderValue(); } } /** * Implementation for deflate and gzip transfer encodings. * * Includes RFC 1950, RFC 1951, and RFC 1952. * * @since 2.8 * @package WordPress * @subpackage HTTP */ class WP_Http_Encoding { /** * Compress raw string using the deflate format. * * Supports the RFC 1951 standard. * * @since 2.8 * * @param string $raw String to compress. * @param int $level Optional, default is 9. Compression level, 9 is highest. * @param string $supports Optional, not used. When implemented it will choose the right compression based on what the server supports. * @return string|bool False on failure. */ public static function compress( $raw, $level = 9, $supports = null ) { return gzdeflate( $raw, $level ); } /** * Decompression of deflated string. * * Will attempt to decompress using the RFC 1950 standard, and if that fails * then the RFC 1951 standard deflate will be attempted. Finally, the RFC * 1952 standard gzip decode will be attempted. If all fail, then the * original compressed string will be returned. * * @since 2.8 * * @param string $compressed String to decompress. * @param int $length The optional length of the compressed data. * @return string|bool False on failure. */ public static function decompress( $compressed, $length = null ) { if ( empty($compressed) ) return $compressed; if ( false !== ( $decompressed = @gzinflate( $compressed ) ) ) return $decompressed; if ( false !== ( $decompressed = WP_Http_Encoding::compatible_gzinflate( $compressed ) ) ) return $decompressed; if ( false !== ( $decompressed = @gzuncompress( $compressed ) ) ) return $decompressed; if ( function_exists('gzdecode') ) { $decompressed = @gzdecode( $compressed ); if ( false !== $decompressed ) return $decompressed; } return $compressed; } /** * Decompression of deflated string while staying compatible with the majority of servers. * * Certain Servers will return deflated data with headers which PHP's gziniflate() * function cannot handle out of the box. The following function has been created from * various snippets on the gzinflate() PHP documentation. * * Warning: Magic numbers within. Due to the potential different formats that the compressed * data may be returned in, some "magic offsets" are needed to ensure proper decompression * takes place. For a simple progmatic way to determine the magic offset in use, see: * http://core.trac.wordpress.org/ticket/18273 * * @since 2.8.1 * @link http://core.trac.wordpress.org/ticket/18273 * @link http://au2.php.net/manual/en/function.gzinflate.php#70875 * @link http://au2.php.net/manual/en/function.gzinflate.php#77336 * * @param string $gzData String to decompress. * @return string|bool False on failure. */ public static function compatible_gzinflate($gzData) { // Compressed data might contain a full header, if so strip it for gzinflate() if ( substr($gzData, 0, 3) == "\x1f\x8b\x08" ) { $i = 10; $flg = ord( substr($gzData, 3, 1) ); if ( $flg > 0 ) { if ( $flg & 4 ) { list($xlen) = unpack('v', substr($gzData, $i, 2) ); $i = $i + 2 + $xlen; } if ( $flg & 8 ) $i = strpos($gzData, "\0", $i) + 1; if ( $flg & 16 ) $i = strpos($gzData, "\0", $i) + 1; if ( $flg & 2 ) $i = $i + 2; } $decompressed = @gzinflate( substr($gzData, $i, -8) ); if ( false !== $decompressed ) return $decompressed; } // Compressed data from java.util.zip.Deflater amongst others. $decompressed = @gzinflate( substr($gzData, 2) ); if ( false !== $decompressed ) return $decompressed; return false; } /** * What encoding types to accept and their priority values. * * @since 2.8 * * @return string Types of encoding to accept. */ public static function accept_encoding() { $type = array(); if ( function_exists( 'gzinflate' ) ) $type[] = 'deflate;q=1.0'; if ( function_exists( 'gzuncompress' ) ) $type[] = 'compress;q=0.5'; if ( function_exists( 'gzdecode' ) ) $type[] = 'gzip;q=0.5'; return implode(', ', $type); } /** * What encoding the content used when it was compressed to send in the headers. * * @since 2.8 * * @return string Content-Encoding string to send in the header. */ public static function content_encoding() { return 'deflate'; } /** * Whether the content be decoded based on the headers. * * @since 2.8 * * @param array|string $headers All of the available headers. * @return bool */ public static function should_decode($headers) { if ( is_array( $headers ) ) { if ( array_key_exists('content-encoding', $headers) && ! empty( $headers['content-encoding'] ) ) return true; } else if ( is_string( $headers ) ) { return ( stripos($headers, 'content-encoding:') !== false ); } return false; } /** * Whether decompression and compression are supported by the PHP version. * * Each function is tested instead of checking for the zlib extension, to * ensure that the functions all exist in the PHP version and aren't * disabled. * * @since 2.8 * * @return bool */ public static function is_available() { return ( function_exists('gzuncompress') || function_exists('gzdeflate') || function_exists('gzinflate') ); } }