X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/8f374b7233bc2815ccc387e448d208c5434eb961..3d39054f012aefe514b3f5509e32f09fc4feda44:/wp-includes/class-http.php diff --git a/wp-includes/class-http.php b/wp-includes/class-http.php index 31a13ea6..c0272ba4 100644 --- a/wp-includes/class-http.php +++ b/wp-includes/class-http.php @@ -1,92 +1,200 @@ 'GET', - 'timeout' => apply_filters( 'http_request_timeout', 5), - 'redirection' => apply_filters( 'http_request_redirection_count', 5), - 'httpversion' => apply_filters( 'http_request_version', '1.0'), - 'user-agent' => apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ) ), + /** + * Filters the timeout value for an HTTP request. + * + * @since 2.7.0 + * + * @param int $timeout_value Time in seconds until a request times out. + * Default 5. + */ + 'timeout' => apply_filters( 'http_request_timeout', 5 ), + /** + * Filters the number of redirects allowed during an HTTP request. + * + * @since 2.7.0 + * + * @param int $redirect_count Number of redirects allowed. Default 5. + */ + 'redirection' => apply_filters( 'http_request_redirection_count', 5 ), + /** + * Filters the version of the HTTP protocol used in a request. + * + * @since 2.7.0 + * + * @param string $version Version of HTTP used. Accepts '1.0' and '1.1'. + * Default '1.0'. + */ + 'httpversion' => apply_filters( 'http_request_version', '1.0' ), + /** + * Filters the user agent value sent with an HTTP request. + * + * @since 2.7.0 + * + * @param string $user_agent WordPress user agent string. + */ + 'user-agent' => apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ) ), + /** + * Filters whether to pass URLs through wp_http_validate_url() in an HTTP request. + * + * @since 3.6.0 + * + * @param bool $pass_url Whether to pass URLs through wp_http_validate_url(). + * Default false. + */ + 'reject_unsafe_urls' => apply_filters( 'http_request_reject_unsafe_urls', false ), 'blocking' => true, 'headers' => array(), 'cookies' => array(), @@ -94,8 +202,10 @@ class WP_Http { 'compress' => false, 'decompress' => true, 'sslverify' => true, + 'sslcertificates' => ABSPATH . WPINC . '/certificates/ca-bundle.crt', 'stream' => false, - 'filename' => null + 'filename' => null, + 'limit_response_size' => null, ); // Pre-parse for the HEAD checks. @@ -106,96 +216,262 @@ class WP_Http { $defaults['redirection'] = 0; $r = wp_parse_args( $args, $defaults ); + /** + * Filters the arguments used in an HTTP request. + * + * @since 2.7.0 + * + * @param array $r An array of HTTP request arguments. + * @param string $url The request URL. + */ $r = apply_filters( 'http_request_args', $r, $url ); - // Certain classes decrement this, store a copy of the original value for loop purposes. - $r['_redirection'] = $r['redirection']; + // The transports decrement this, store a copy of the original value for loop purposes. + if ( ! isset( $r['_redirection'] ) ) + $r['_redirection'] = $r['redirection']; - // Allow plugins to short-circuit the request + /** + * Filters whether to preempt an HTTP request's return value. + * + * Returning a non-false value from the filter will short-circuit the HTTP request and return + * early with that value. A filter should return either: + * + * - An array containing 'headers', 'body', 'response', 'cookies', and 'filename' elements + * - A WP_Error instance + * - boolean false (to avoid short-circuiting the response) + * + * Returning any other value may result in unexpected behaviour. + * + * @since 2.9.0 + * + * @param false|array|WP_Error $preempt Whether to preempt an HTTP request's return value. Default false. + * @param array $r HTTP request arguments. + * @param string $url The request URL. + */ $pre = apply_filters( 'pre_http_request', false, $r, $url ); + if ( false !== $pre ) return $pre; - $arrURL = parse_url( $url ); + if ( function_exists( 'wp_kses_bad_protocol' ) ) { + if ( $r['reject_unsafe_urls'] ) { + $url = wp_http_validate_url( $url ); + } + if ( $url ) { + $url = wp_kses_bad_protocol( $url, array( 'http', 'https', 'ssl' ) ); + } + } + + $arrURL = @parse_url( $url ); - if ( empty( $url ) || empty( $arrURL['scheme'] ) ) + if ( empty( $url ) || empty( $arrURL['scheme'] ) ) { return new WP_Error('http_request_failed', __('A valid URL was not provided.')); + } - if ( $this->block_request( $url ) ) + if ( $this->block_request( $url ) ) { return new WP_Error( 'http_request_failed', __( 'User has blocked requests through HTTP.' ) ); - - // Determine if this is a https call and pass that on to the transport functions - // so that we can blacklist the transports that do not support ssl verification - $r['ssl'] = $arrURL['scheme'] == 'https' || $arrURL['scheme'] == 'ssl'; - - // Determine if this request is to OUR install of WordPress - $homeURL = parse_url( get_bloginfo( 'url' ) ); - $r['local'] = $homeURL['host'] == $arrURL['host'] || 'localhost' == $arrURL['host']; - unset( $homeURL ); + } // If we are streaming to a file but no filename was given drop it in the WP temp dir - // and pick it's name using the basename of the $url - if ( $r['stream'] && empty( $r['filename'] ) ) - $r['filename'] = get_temp_dir() . basename( $url ); - - // Force some settings if we are streaming to a file and check for existence and perms of destination directory + // and pick its name using the basename of the $url if ( $r['stream'] ) { + if ( empty( $r['filename'] ) ) { + $r['filename'] = get_temp_dir() . basename( $url ); + } + + // Force some settings if we are streaming to a file and check for existence and perms of destination directory $r['blocking'] = true; - if ( ! is_writable( dirname( $r['filename'] ) ) ) + if ( ! wp_is_writable( dirname( $r['filename'] ) ) ) { return new WP_Error( 'http_request_failed', __( 'Destination directory for file streaming does not exist or is not writable.' ) ); + } } - if ( is_null( $r['headers'] ) ) + if ( is_null( $r['headers'] ) ) { $r['headers'] = array(); + } + // WP allows passing in headers as a string, weirdly. if ( ! is_array( $r['headers'] ) ) { $processedHeaders = WP_Http::processHeaders( $r['headers'] ); $r['headers'] = $processedHeaders['headers']; } - if ( isset( $r['headers']['User-Agent'] ) ) { - $r['user-agent'] = $r['headers']['User-Agent']; - unset( $r['headers']['User-Agent'] ); - } + // Setup arguments + $headers = $r['headers']; + $data = $r['body']; + $type = $r['method']; + $options = array( + 'timeout' => $r['timeout'], + 'useragent' => $r['user-agent'], + 'blocking' => $r['blocking'], + 'hooks' => new Requests_Hooks(), + ); + + // Ensure redirects follow browser behaviour. + $options['hooks']->register( 'requests.before_redirect', array( get_class(), 'browser_redirect_compatibility' ) ); - if ( isset( $r['headers']['user-agent'] ) ) { - $r['user-agent'] = $r['headers']['user-agent']; - unset( $r['headers']['user-agent'] ); + if ( $r['stream'] ) { + $options['filename'] = $r['filename']; + } + if ( empty( $r['redirection'] ) ) { + $options['follow_redirects'] = false; + } else { + $options['redirects'] = $r['redirection']; } - // Construct Cookie: header if any cookies are set - WP_Http::buildCookieHeader( $r ); + // Use byte limit, if we can + if ( isset( $r['limit_response_size'] ) ) { + $options['max_bytes'] = $r['limit_response_size']; + } - if ( WP_Http_Encoding::is_available() ) - $r['headers']['Accept-Encoding'] = WP_Http_Encoding::accept_encoding(); + // If we've got cookies, use and convert them to Requests_Cookie. + if ( ! empty( $r['cookies'] ) ) { + $options['cookies'] = WP_Http::normalize_cookies( $r['cookies'] ); + } - if ( empty($r['body']) ) { - $r['body'] = null; - // Some servers fail when sending content without the content-length header being set. - // Also, to fix another bug, we only send when doing POST and PUT and the content-length - // header isn't already set. - if ( ($r['method'] == 'POST' || $r['method'] == 'PUT') && ! isset( $r['headers']['Content-Length'] ) ) - $r['headers']['Content-Length'] = 0; + // SSL certificate handling + if ( ! $r['sslverify'] ) { + $options['verify'] = false; } else { - if ( is_array( $r['body'] ) || is_object( $r['body'] ) ) { - $r['body'] = http_build_query( $r['body'], null, '&' ); - if ( ! isset( $r['headers']['Content-Type'] ) ) - $r['headers']['Content-Type'] = 'application/x-www-form-urlencoded; charset=' . get_option( 'blog_charset' ); - $r['headers']['Content-Length'] = strlen( $r['body'] ); + $options['verify'] = $r['sslcertificates']; + } + + // All non-GET/HEAD requests should put the arguments in the form body. + if ( 'HEAD' !== $type && 'GET' !== $type ) { + $options['data_format'] = 'body'; + } + + /** + * Filters whether SSL should be verified for non-local requests. + * + * @since 2.8.0 + * + * @param bool $ssl_verify Whether to verify the SSL connection. Default true. + */ + $options['verify'] = apply_filters( 'https_ssl_verify', $options['verify'] ); + + // Check for proxies. + $proxy = new WP_HTTP_Proxy(); + if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { + $options['proxy'] = new Requests_Proxy_HTTP( $proxy->host() . ':' . $proxy->port() ); + + if ( $proxy->use_authentication() ) { + $options['proxy']->use_authentication = true; + $options['proxy']->user = $proxy->username(); + $options['proxy']->pass = $proxy->password(); } + } + + // Work around a bug in Requests when the path starts with // See https://github.com/rmccue/Requests/issues/231 + $url = preg_replace( '!^(\w+://[^/]+)//(.*)$!i', '$1/$2', $url ); + + try { + $requests_response = Requests::request( $url, $headers, $data, $type, $options ); + + // Convert the response into an array + $http_response = new WP_HTTP_Requests_Response( $requests_response, $r['filename'] ); + $response = $http_response->to_array(); + + // Add the original object to the array. + $response['http_response'] = $http_response; + } + catch ( Requests_Exception $e ) { + $response = new WP_Error( 'http_request_failed', $e->getMessage() ); + } + + /** + * Fires after an HTTP API response is received and before the response is returned. + * + * @since 2.8.0 + * + * @param array|WP_Error $response HTTP response or WP_Error object. + * @param string $context Context under which the hook is fired. + * @param string $class HTTP transport used. + * @param array $args HTTP request arguments. + * @param string $url The request URL. + */ + do_action( 'http_api_debug', $response, 'response', 'Requests', $r, $url ); + if ( is_wp_error( $response ) ) { + return $response; + } + + if ( ! $r['blocking'] ) { + return array( + 'headers' => array(), + 'body' => '', + 'response' => array( + 'code' => false, + 'message' => false, + ), + 'cookies' => array(), + 'http_response' => null, + ); + } + + /** + * Filters the HTTP API response immediately before the response is returned. + * + * @since 2.9.0 + * + * @param array $response HTTP response. + * @param array $r HTTP request arguments. + * @param string $url The request URL. + */ + return apply_filters( 'http_response', $response, $r, $url ); + } + + /** + * Normalizes cookies for using in Requests. + * + * @since 4.6.0 + * @access public + * @static + * + * @param array $cookies List of cookies to send with the request. + * @return Requests_Cookie_Jar Cookie holder object. + */ + public static function normalize_cookies( $cookies ) { + $cookie_jar = new Requests_Cookie_Jar(); - if ( ! isset( $r['headers']['Content-Length'] ) && ! isset( $r['headers']['content-length'] ) ) - $r['headers']['Content-Length'] = strlen( $r['body'] ); + foreach ( $cookies as $name => $value ) { + if ( $value instanceof WP_Http_Cookie ) { + $cookie_jar[ $value->name ] = new Requests_Cookie( $value->name, $value->value, $value->get_attributes() ); + } elseif ( is_scalar( $value ) ) { + $cookie_jar[ $name ] = new Requests_Cookie( $name, $value ); + } } - return $this->_dispatch_request($url, $r); + return $cookie_jar; + } + + /** + * Match redirect behaviour to browser handling. + * + * Changes 302 redirects from POST to GET to match browser handling. Per + * RFC 7231, user agents can deviate from the strict reading of the + * specification for compatibility purposes. + * + * @since 4.6.0 + * @access public + * @static + * + * @param string $location URL to redirect to. + * @param array $headers Headers for the redirect. + * @param array $options Redirect request options. + * @param Requests_Response $original Response object. + */ + public static function browser_redirect_compatibility( $location, $headers, $data, &$options, $original ) { + // Browser compat + if ( $original->status_code === 302 ) { + $options['type'] = Requests::GET; + } } /** * Tests which transports are capable of supporting the request. * * @since 3.2.0 - * @access private + * @access public * * @param array $args Request arguments * @param string $url URL to Request @@ -203,13 +479,28 @@ class WP_Http { * @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' ); + $transports = array( 'curl', 'streams' ); + + /** + * Filters which HTTP transports are available and in what order. + * + * @since 3.7.0 + * + * @param array $transports Array of HTTP transports to check. Default array contains + * 'curl', and 'streams', in that order. + * @param array $args HTTP request arguments. + * @param string $url The URL to request. + */ + $request_order = apply_filters( 'http_api_transports', $transports, $args, $url ); - // Loop over each transport on each HTTP request looking for one which will serve this request's needs + // 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; + if ( in_array( $transport, $transports ) ) { + $transport = ucfirst( $transport ); + } + $class = 'WP_Http_' . $transport; - // Check to see if this transport is a possibility, calls the transport statically + // Check to see if this transport is a possibility, calls the transport statically. if ( !call_user_func( array( $class, 'test' ), $args, $url ) ) continue; @@ -225,20 +516,16 @@ class WP_Http { * 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." + * The order for requests is cURL, and then PHP Streams. * * @since 3.2.0 + * + * @static * @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 + * @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error */ private function _dispatch_request( $url, $args ) { static $transports = array(); @@ -253,11 +540,21 @@ class WP_Http { $response = $transports[$class]->request( $url, $args ); + /** This action is documented in wp-includes/class-http.php */ do_action( 'http_api_debug', $response, 'response', $class, $args, $url ); if ( is_wp_error( $response ) ) return $response; + /** + * Filters the HTTP API response immediately before the response is returned. + * + * @since 2.9.0 + * + * @param array $response HTTP response. + * @param array $args HTTP request arguments. + * @param string $url The request URL. + */ return apply_filters( 'http_response', $response, $args, $url ); } @@ -269,11 +566,11 @@ class WP_Http { * @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 + * @param string $url The request URL. + * @param string|array $args Optional. Override the defaults. + * @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error */ - function post($url, $args = array()) { + public function post($url, $args = array()) { $defaults = array('method' => 'POST'); $r = wp_parse_args( $args, $defaults ); return $this->request($url, $r); @@ -287,11 +584,11 @@ class WP_Http { * @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 + * @param string $url The request URL. + * @param string|array $args Optional. Override the defaults. + * @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error */ - function get($url, $args = array()) { + public function get($url, $args = array()) { $defaults = array('method' => 'GET'); $r = wp_parse_args( $args, $defaults ); return $this->request($url, $r); @@ -305,11 +602,11 @@ class WP_Http { * @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 + * @param string $url The request URL. + * @param string|array $args Optional. Override the defaults. + * @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error */ - function head($url, $args = array()) { + public function head($url, $args = array()) { $defaults = array('method' => 'HEAD'); $r = wp_parse_args( $args, $defaults ); return $this->request($url, $r); @@ -325,7 +622,7 @@ class WP_Http { * @param string $strResponse The full response string * @return array Array with 'headers' and 'body' keys. */ - function processResponse($strResponse) { + public static function processResponse($strResponse) { $res = explode("\r\n\r\n", $strResponse, 2); return array('headers' => $res[0], 'body' => isset($res[1]) ? $res[1] : ''); @@ -342,24 +639,30 @@ class WP_Http { * @since 2.7.0 * * @param string|array $headers + * @param string $url The URL that was requested * @return array Processed string headers. If duplicate headers are encountered, * Then a numbered array is returned as the value of that header-key. */ - public static function processHeaders($headers) { - // split headers, one per array element + public static function processHeaders( $headers, $url = '' ) { + // Split headers, one per array element. if ( is_string($headers) ) { - // tolerate line terminator: CRLF = LF (RFC 2616 19.3) + // 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) + /* + * Unfold folded header fields. LWS = [CRLF] 1*( SP | HT ) , + * (RFC 2616 2.2). + */ $headers = preg_replace('/\n[ \t]/', ' ', $headers); - // create the headers array + // 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. + /* + * 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, $i); @@ -382,29 +685,32 @@ class WP_Http { list($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 ); + $key = strtolower( $key ); + $value = trim( $value ); + + if ( isset( $newheaders[ $key ] ) ) { + if ( ! is_array( $newheaders[ $key ] ) ) + $newheaders[$key] = array( $newheaders[ $key ] ); + $newheaders[ $key ][] = $value; + } else { + $newheaders[ $key ] = $value; } + if ( 'set-cookie' == $key ) + $cookies[] = new WP_Http_Cookie( $value, $url ); } + // Cast the Response Code to an int + $response['code'] = intval( $response['code'] ); + return array('response' => $response, 'headers' => $newheaders, 'cookies' => $cookies); } /** * Takes the arguments for a ::request() and checks for the cookie array. * - * If it's found, then it's assumed to contain WP_Http_Cookie objects, which are each parsed - * into strings and added to the Cookie: header (within the arguments array). Edits the array by - * reference. + * If it's found, then it upgrades any basic name => value pairs to WP_Http_Cookie instances, + * which are each parsed into strings and added to the Cookie: header (within the arguments array). + * Edits the array by reference. * * @access public * @version 2.8.0 @@ -414,10 +720,17 @@ class WP_Http { */ public static function buildCookieHeader( &$r ) { if ( ! empty($r['cookies']) ) { + // Upgrade any name => value cookie pairs to WP_HTTP_Cookie instances. + foreach ( $r['cookies'] as $name => $value ) { + if ( ! is_object( $value ) ) + $r['cookies'][ $name ] = new WP_Http_Cookie( array( 'name' => $name, 'value' => $value ) ); + } + $cookies_header = ''; foreach ( (array) $r['cookies'] as $cookie ) { $cookies_header .= $cookie->getHeaderValue() . '; '; } + $cookies_header = substr( $cookies_header, 0, -2 ); $r['headers']['cookie'] = $cookies_header; } @@ -426,10 +739,10 @@ class WP_Http { /** * 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. + * Based off the HTTP http_encoding_dechunk function. + * + * @link https://tools.ietf.org/html/rfc2616#section-19.4.6 Process for chunked decoding. * - * @todo Add support for footer chunked headers. * @access public * @since 2.7.0 * @static @@ -437,35 +750,33 @@ class WP_Http { * @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) ) ) + public static function chunkTransferDecode( $body ) { + // The body is not chunked encoded or is malformed. + if ( ! preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', trim( $body ) ) ) return $body; - $parsedBody = ''; - //$parsedHeaders = array(); Unsupported + $parsed_body = ''; - while ( true ) { - $hasChunk = (bool) preg_match( '/^([0-9a-f]+)(\s|\n)+/mi', $body, $match ); + // We'll be altering $body, so need a backup in case of error. + $body_original = $body; - if ( $hasChunk ) { - if ( empty( $match[1] ) ) - return $body; + while ( true ) { + $has_chunk = (bool) preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', $body, $match ); + if ( ! $has_chunk || empty( $match[1] ) ) + return $body_original; - $length = hexdec( $match[1] ); - $chunkLength = strlen( $match[0] ); + $length = hexdec( $match[1] ); + $chunk_length = strlen( $match[0] ); - $strBody = substr($body, $chunkLength, $length); - $parsedBody .= $strBody; + // Parse out the chunk of data. + $parsed_body .= substr( $body, $chunk_length, $length ); - $body = ltrim(str_replace(array($match[0], $strBody), '', $body), "\n"); + // Remove the chunk from the raw data. + $body = substr( $body, $length + $chunk_length ); - if ( "0" == trim($body) ) - return $parsedBody; // Ignore footer headers. - } else { - return $body; - } + // End of the document. + if ( '0' === trim( $body ) ) + return $parsed_body; } } @@ -476,55 +787,57 @@ class WP_Http { * 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 + * file and this will only allow localhost and your site 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 + * @link https://core.trac.wordpress.org/ticket/8927 Allow preventing external requests. + * @link https://core.trac.wordpress.org/ticket/14636 Allow wildcard domains in WP_ACCESSIBLE_HOSTS + * + * @staticvar array|null $accessible_hosts + * @staticvar array $wildcard_regex * * @param string $uri URI of url. * @return bool True to block, false to allow. */ - function block_request($uri) { + public 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; + $check = parse_url($uri); + if ( ! $check ) + return true; $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); + // Don't block requests back to ourselves by default. + if ( 'localhost' == $check['host'] || ( isset( $home['host'] ) && $home['host'] == $check['host'] ) ) { + /** + * Filters whether to block local requests through the proxy. + * + * @since 2.8.0 + * + * @param bool $block Whether to block local requests through proxy. + * Default false. + */ + 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 ) { + static $accessible_hosts = null; + static $wildcard_regex = array(); + 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[] = str_replace( '\*', '.+', preg_quote( $host, '/' ) ); $wildcard_regex = '/^(' . implode('|', $wildcard_regex) . ')$/i'; } } @@ -532,1258 +845,175 @@ class WP_Http { 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. + return !in_array( $check['host'], $accessible_hosts ); //Inverse logic, If it's in the array, then we can't access it. } - static function make_absolute_url( $maybe_relative_path, $url ) { + /** + * Used as a wrapper for PHP's parse_url() function that handles edgecases in < PHP 5.4.7. + * + * @access protected + * @deprecated 4.4.0 Use wp_parse_url() + * @see wp_parse_url() + * + * @param string $url The URL to parse. + * @return bool|array False on failure; Array of URL components on success; + * See parse_url()'s return values. + */ + protected static function parse_url( $url ) { + _deprecated_function( __METHOD__, '4.4.0', 'wp_parse_url()' ); + return wp_parse_url( $url ); + } + + /** + * Converts a relative URL to an absolute URL relative to a given URL. + * + * If an Absolute URL is provided, no processing of that URL is done. + * + * @since 3.4.0 + * + * @static + * @access public + * + * @param string $maybe_relative_path The URL which might be relative + * @param string $url The URL which $maybe_relative_path is relative to + * @return string An Absolute URL, in a failure condition where the URL cannot be parsed, the relative URL will be returned. + */ + public static function make_absolute_url( $maybe_relative_path, $url ) { if ( empty( $url ) ) return $maybe_relative_path; - // Check for a scheme - if ( false !== strpos( $maybe_relative_path, '://' ) ) + if ( ! $url_parts = wp_parse_url( $url ) ) { return $maybe_relative_path; + } - if ( ! $url_parts = @parse_url( $url ) ) + if ( ! $relative_url_parts = wp_parse_url( $maybe_relative_path ) ) { return $maybe_relative_path; + } - if ( ! $relative_url_parts = @parse_url( $maybe_relative_path ) ) + // Check for a scheme on the 'relative' url + if ( ! empty( $relative_url_parts['scheme'] ) ) { return $maybe_relative_path; + } + + $absolute_path = $url_parts['scheme'] . '://'; - $absolute_path = $url_parts['scheme'] . '://' . $url_parts['host']; - if ( isset( $url_parts['port'] ) ) - $absolute_path .= ':' . $url_parts['port']; + // Schemeless URL's will make it this far, so we check for a host in the relative url and convert it to a protocol-url + if ( isset( $relative_url_parts['host'] ) ) { + $absolute_path .= $relative_url_parts['host']; + if ( isset( $relative_url_parts['port'] ) ) + $absolute_path .= ':' . $relative_url_parts['port']; + } else { + $absolute_path .= $url_parts['host']; + if ( isset( $url_parts['port'] ) ) + $absolute_path .= ':' . $url_parts['port']; + } - // Start off with the Absolute URL path + // Start off with the Absolute URL path. $path = ! empty( $url_parts['path'] ) ? $url_parts['path'] : '/'; - // If the it's a root-relative path, then great + // If it's a root-relative path, then great. if ( ! empty( $relative_url_parts['path'] ) && '/' == $relative_url_parts['path'][0] ) { $path = $relative_url_parts['path']; - // Else it's a relative path + // Else it's a relative path. } elseif ( ! empty( $relative_url_parts['path'] ) ) { - // Strip off any file components from the absolute path + // Strip off any file components from the absolute path. $path = substr( $path, 0, strrpos( $path, '/' ) + 1 ); - // Build the new path + // Build the new path. $path .= $relative_url_parts['path']; - // Strip all /path/../ out of the path + // Strip all /path/../ out of the path. while ( strpos( $path, '../' ) > 1 ) { $path = preg_replace( '![^/]+/\.\./!', '', $path ); } - // Strip any final leading ../ from the path + // Strip any final leading ../ from the path. $path = preg_replace( '!^/(\.\./)+!', '', $path ); } - // Add the Query string + // Add the Query string. if ( ! empty( $relative_url_parts['query'] ) ) $path .= '?' . $relative_url_parts['query']; return $absolute_path . '/' . ltrim( $path, '/' ); } -} -/** - * 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(). + * Handles HTTP Redirects and follows them if appropriate. * - * Does not support non-blocking mode. + * @since 3.7.0 * - * @see WP_Http::request For default options descriptions. + * @static * - * @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. + * @param string $url The URL which was requested. + * @param array $args The Arguments which were used to make the request. + * @param array $response The Response of the HTTP request. + * @return false|object False if no redirect is present, a WP_HTTP or WP_Error result otherwise. */ - function request($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); + public static function handle_redirects( $url, $args, $response ) { + // If no redirects are present, or, redirects were not requested, perform no action. + if ( ! isset( $response['headers']['location'] ) || 0 === $args['_redirection'] ) + return false; - if ( ! $r['blocking'] ) { - fclose($handle); - return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); - } + // Only perform redirections on redirection http codes. + if ( $response['response']['code'] > 399 || $response['response']['code'] < 300 ) + return false; - $strResponse = ''; - $bodyStarted = false; + // Don't redirect if we've run out of redirects. + if ( $args['redirection']-- <= 0 ) + return new WP_Error( 'http_request_failed', __('Too many redirects.') ); - // 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'] = ''; - } - } - } + $redirect_location = $response['headers']['location']; - fclose( $stream_handle ); + // If there were multiple Location headers, use the last header specified. + if ( is_array( $redirect_location ) ) + $redirect_location = array_pop( $redirect_location ); - } else { - while ( ! feof($handle) ) - $strResponse .= fread( $handle, 4096 ); + $redirect_location = WP_Http::make_absolute_url( $redirect_location, $url ); - $process = WP_Http::processResponse( $strResponse ); - unset( $strResponse ); + // POST requests should not POST to a redirected location. + if ( 'POST' == $args['method'] ) { + if ( in_array( $response['response']['code'], array( 302, 303 ) ) ) + $args['method'] = 'GET'; } - 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( WP_HTTP::make_absolute_url( $arrHeaders['headers']['location'], $url ), $r); - } else { - return new WP_Error('http_request_failed', __('Too many redirects.')); + // Include valid cookies in the redirect process. + if ( ! empty( $response['cookies'] ) ) { + foreach ( $response['cookies'] as $cookie ) { + if ( $cookie->test( $redirect_location ) ) + $args['cookies'][] = $cookie; } } - // 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'] ); + return wp_remote_request( $redirect_location, $args ); } /** - * Whether this class can be used for retrieving an URL. + * Determines if a specified string represents an IP address or not. * - * @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(). + * This function also detects the type of the IP address, returning either + * '4' or '6' to represent a IPv4 and IPv6 address respectively. + * This does not verify if the IP is a valid IP, only that it appears to be + * an IP address. * - * @access public - * @since 2.7.0 + * @link http://home.deds.nl/~aeron/regex/ for IPv6 regex + * + * @since 3.7.0 + * @static * - * @param string $url - * @param str|array $args Optional. Override the defaults. - * @return array 'headers', 'body', 'response', 'cookies' and 'filename' keys. + * @param string $maybe_ip A suspected IP address + * @return integer|bool Upon success, '4' or '6' to represent a IPv4 or IPv6 address, false upon failure */ - function request($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 - ) - ) - ); + public static function is_ip_address( $maybe_ip ) { + if ( preg_match( '/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/', $maybe_ip ) ) + return 4; - $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']; + if ( false !== strpos( $maybe_ip, ':' ) && preg_match( '/^(((?=.*(::))(?!.*\3.+\3))\3?|([\dA-F]{1,4}(\3|:\b|$)|\2))(?4){5}((?4){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5])\.?\b){4})$/i', trim( $maybe_ip, ' []' ) ) ) + return 6; - $context = stream_context_create($arrContext); + return false; + } - 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() ); - } - } - - $is_local = isset($r['local']) && $r['local']; - $ssl_verify = isset($r['sslverify']) && $r['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'] ); - // The option doesn't work with safe mode or when open_basedir is set, and there's a - // bug #17490 with redirected POST requests, so handle redirections outside Curl. - curl_setopt( $handle, CURLOPT_FOLLOWLOCATION, false ); - - 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; - default: - curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, $r['method'] ); - if ( ! empty( $r['body'] ) ) - 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 ); - } - - 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 - if ( 0 == strlen( $theResponse ) && empty( $theHeaders['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'] ) && 0 !== $r['_redirection'] ) { // _redirection: The requested number of redirections - if ( $r['redirection']-- > 0 ) { - return $this->request( WP_HTTP::make_absolute_url( $theHeaders['headers']['location'], $url ), $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. - *
  2. WP_PROXY_PORT - Proxy port for connection. No default, must be defined.
    3. - *
  3. WP_PROXY_USERNAME - Proxy username, if it requires authentication.
    4. - *
  4. WP_PROXY_PASSWORD - Proxy password, if it requires authentication.
    5. - *
  5. 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
    6. - *
- * - * 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. - *
  2. Value - should NOT be urlencoded already.
    3. - *
  3. Expires - (optional) String or int (UNIX timestamp).
    4. - *
  4. Path (optional)
    5. - *
  5. Domain (optional)
    6. - *
- * - * @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 . '=' . apply_filters( 'wp_http_cookie_value', $this->value, $this->name ); - } - - /** - * 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') ); - } }