WordPress 4.6.1
[autoinstalls/wordpress.git] / wp-includes / class-http.php
index 13cf1442fe929bbac6890b096eb4154834fcdfa5..c0272ba487fbc89d42cc9cfff28e4890e9317db7 100644 (file)
@@ -1,19 +1,21 @@
 <?php
 /**
- * Simple and uniform HTTP request API.
- *
- * Standardizes the HTTP requests for WordPress. Handles cookies, gzip encoding and decoding, chunk
- * decoding, if HTTP 1.1 and various other difficult HTTP protocol implementations.
- *
- * @link http://trac.wordpress.org/ticket/4779 HTTP API Proposal
+ * HTTP API: WP_Http class
  *
  * @package WordPress
  * @subpackage HTTP
  * @since 2.7.0
  */
 
+if ( ! class_exists( 'Requests' ) ) {
+       require( ABSPATH . WPINC . '/class-requests.php' );
+
+       Requests::register_autoloader();
+       Requests::set_certificate_path( ABSPATH . WPINC . '/certificates/ca-bundle.crt' );
+}
+
 /**
- * WordPress HTTP Class for managing HTTP Transports and making HTTP requests.
+ * Core class used for managing HTTP transports and making HTTP requests.
  *
  * This class is used to consistently make outgoing HTTP requests easy for developers
  * while still being compatible with the many PHP configurations under which
  *
  * Debugging includes several actions, which pass different variables for debugging the HTTP API.
  *
- * @package WordPress
- * @subpackage HTTP
  * @since 2.7.0
  */
 class WP_Http {
 
-       /**
-        * Send a HTTP request to a URI.
-        *
-        * The body and headers are part of the arguments. The 'body' argument is for the body and will
-        * accept either a string or an array. The 'headers' argument should be an array, but a string
-        * is acceptable. If the 'body' argument is an array, then it will automatically be escaped
-        * using http_build_query().
-        *
-        * The only URI that are supported in the HTTP Transport implementation are the HTTP and HTTPS
-        * protocols.
-        *
-        * The defaults are 'method', 'timeout', 'redirection', 'httpversion', 'blocking' and
-        * 'user-agent'.
-        *
-        * Accepted 'method' values are 'GET', 'POST', and 'HEAD', some transports technically allow
-        * others, but should not be assumed. The 'timeout' is used to sent how long the connection
-        * should stay open before failing when no response. 'redirection' is used to track how many
-        * redirects were taken and used to sent the amount for other transports, but not all transports
-        * accept setting that value.
-        *
-        * The 'httpversion' option is used to sent the HTTP version and accepted values are '1.0', and
-        * '1.1' and should be a string. The 'user-agent' option is the user-agent and is used to
-        * replace the default user-agent, which is 'WordPress/WP_Version', where WP_Version is the
-        * value from $wp_version.
-        *
-        * The 'blocking' parameter can be used to specify if the calling code requires the result of
-        * the HTTP request. If set to false, the request will be sent to the remote server, and
-        * processing returned to the calling code immediately, the caller will know if the request
-        * suceeded or failed, but will not receive any response from the remote server.
+       // Aliases for HTTP response codes.
+       const HTTP_CONTINUE                   = 100;
+       const SWITCHING_PROTOCOLS             = 101;
+       const PROCESSING                      = 102;
+
+       const OK                              = 200;
+       const CREATED                         = 201;
+       const ACCEPTED                        = 202;
+       const NON_AUTHORITATIVE_INFORMATION   = 203;
+       const NO_CONTENT                      = 204;
+       const RESET_CONTENT                   = 205;
+       const PARTIAL_CONTENT                 = 206;
+       const MULTI_STATUS                    = 207;
+       const IM_USED                         = 226;
+
+       const MULTIPLE_CHOICES                = 300;
+       const MOVED_PERMANENTLY               = 301;
+       const FOUND                           = 302;
+       const SEE_OTHER                       = 303;
+       const NOT_MODIFIED                    = 304;
+       const USE_PROXY                       = 305;
+       const RESERVED                        = 306;
+       const TEMPORARY_REDIRECT              = 307;
+       const PERMANENT_REDIRECT              = 308;
+
+       const BAD_REQUEST                     = 400;
+       const UNAUTHORIZED                    = 401;
+       const PAYMENT_REQUIRED                = 402;
+       const FORBIDDEN                       = 403;
+       const NOT_FOUND                       = 404;
+       const METHOD_NOT_ALLOWED              = 405;
+       const NOT_ACCEPTABLE                  = 406;
+       const PROXY_AUTHENTICATION_REQUIRED   = 407;
+       const REQUEST_TIMEOUT                 = 408;
+       const CONFLICT                        = 409;
+       const GONE                            = 410;
+       const LENGTH_REQUIRED                 = 411;
+       const PRECONDITION_FAILED             = 412;
+       const REQUEST_ENTITY_TOO_LARGE        = 413;
+       const REQUEST_URI_TOO_LONG            = 414;
+       const UNSUPPORTED_MEDIA_TYPE          = 415;
+       const REQUESTED_RANGE_NOT_SATISFIABLE = 416;
+       const EXPECTATION_FAILED              = 417;
+       const IM_A_TEAPOT                     = 418;
+       const MISDIRECTED_REQUEST             = 421;
+       const UNPROCESSABLE_ENTITY            = 422;
+       const LOCKED                          = 423;
+       const FAILED_DEPENDENCY               = 424;
+       const UPGRADE_REQUIRED                = 426;
+       const PRECONDITION_REQUIRED           = 428;
+       const TOO_MANY_REQUESTS               = 429;
+       const REQUEST_HEADER_FIELDS_TOO_LARGE = 431;
+       const UNAVAILABLE_FOR_LEGAL_REASONS   = 451;
+
+       const INTERNAL_SERVER_ERROR           = 500;
+       const NOT_IMPLEMENTED                 = 501;
+       const BAD_GATEWAY                     = 502;
+       const SERVICE_UNAVAILABLE             = 503;
+       const GATEWAY_TIMEOUT                 = 504;
+       const HTTP_VERSION_NOT_SUPPORTED      = 505;
+       const VARIANT_ALSO_NEGOTIATES         = 506;
+       const INSUFFICIENT_STORAGE            = 507;
+       const NOT_EXTENDED                    = 510;
+       const NETWORK_AUTHENTICATION_REQUIRED = 511;
+
+       /**
+        * Send an HTTP request to a URI.
+        *
+        * Please note: The only URI that are supported in the HTTP Transport implementation
+        * are the HTTP and HTTPS protocols.
         *
         * @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 request( $url, $args = array() ) {
+        * @global string $wp_version
+        *
+        * @param string       $url  The request URL.
+        * @param string|array $args {
+        *     Optional. Array or string of HTTP request arguments.
+        *
+        *     @type string       $method              Request method. Accepts 'GET', 'POST', 'HEAD', or 'PUT'.
+        *                                             Some transports technically allow others, but should not be
+        *                                             assumed. Default 'GET'.
+        *     @type int          $timeout             How long the connection should stay open in seconds. Default 5.
+        *     @type int          $redirection         Number of allowed redirects. Not supported by all transports
+        *                                             Default 5.
+        *     @type string       $httpversion         Version of the HTTP protocol to use. Accepts '1.0' and '1.1'.
+        *                                             Default '1.0'.
+        *     @type string       $user-agent          User-agent value sent.
+        *                                             Default WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ).
+        *     @type bool         $reject_unsafe_urls  Whether to pass URLs through wp_http_validate_url().
+        *                                             Default false.
+        *     @type bool         $blocking            Whether the calling code requires the result of the request.
+        *                                             If set to false, the request will be sent to the remote server,
+        *                                             and processing returned to the calling code immediately, the caller
+        *                                             will know if the request succeeded or failed, but will not receive
+        *                                             any response from the remote server. Default true.
+        *     @type string|array $headers             Array or string of headers to send with the request.
+        *                                             Default empty array.
+        *     @type array        $cookies             List of cookies to send with the request. Default empty array.
+        *     @type string|array $body                Body to send with the request. Default null.
+        *     @type bool         $compress            Whether to compress the $body when sending the request.
+        *                                             Default false.
+        *     @type bool         $decompress          Whether to decompress a compressed response. If set to false and
+        *                                             compressed content is returned in the response anyway, it will
+        *                                             need to be separately decompressed. Default true.
+        *     @type bool         $sslverify           Whether to verify SSL for the request. Default true.
+        *     @type string       sslcertificates      Absolute path to an SSL certificate .crt file.
+        *                                             Default ABSPATH . WPINC . '/certificates/ca-bundle.crt'.
+        *     @type bool         $stream              Whether to stream to a file. If set to true and no filename was
+        *                                             given, it will be droped it in the WP temp dir and its name will
+        *                                             be set using the basename of the URL. Default false.
+        *     @type string       $filename            Filename of the file to write to when streaming. $stream must be
+        *                                             set to true. Default null.
+        *     @type int          $limit_response_size Size in bytes to limit the response to. Default null.
+        *
+        * }
+        * @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'.
+        *                        A WP_Error instance upon error.
+        */
+       public function request( $url, $args = array() ) {
                global $wp_version;
 
                $defaults = array(
                        'method' => 'GET',
                        /**
-                        * Filter the timeout value for an HTTP request.
+                        * Filters the timeout value for an HTTP request.
                         *
                         * @since 2.7.0
                         *
@@ -79,7 +162,7 @@ class WP_Http {
                         */
                        'timeout' => apply_filters( 'http_request_timeout', 5 ),
                        /**
-                        * Filter the number of redirects allowed during an HTTP request.
+                        * Filters the number of redirects allowed during an HTTP request.
                         *
                         * @since 2.7.0
                         *
@@ -87,7 +170,7 @@ class WP_Http {
                         */
                        'redirection' => apply_filters( 'http_request_redirection_count', 5 ),
                        /**
-                        * Filter the version of the HTTP protocol used in a request.
+                        * Filters the version of the HTTP protocol used in a request.
                         *
                         * @since 2.7.0
                         *
@@ -96,7 +179,7 @@ class WP_Http {
                         */
                        'httpversion' => apply_filters( 'http_request_version', '1.0' ),
                        /**
-                        * Filter the user agent value sent with an HTTP request.
+                        * Filters the user agent value sent with an HTTP request.
                         *
                         * @since 2.7.0
                         *
@@ -104,7 +187,7 @@ class WP_Http {
                         */
                        'user-agent' => apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ) ),
                        /**
-                        * Filter whether to pass URLs through wp_http_validate_url() in an HTTP request.
+                        * Filters whether to pass URLs through wp_http_validate_url() in an HTTP request.
                         *
                         * @since 3.6.0
                         *
@@ -134,12 +217,12 @@ class WP_Http {
 
                $r = wp_parse_args( $args, $defaults );
                /**
-                * Filter the arguments used in an HTTP request.
+                * 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 URI resource.
+                * @param string $url The request URL.
                 */
                $r = apply_filters( 'http_request_args', $r, $url );
 
@@ -148,153 +231,276 @@ class WP_Http {
                        $r['_redirection'] = $r['redirection'];
 
                /**
-                * Filter whether to preempt an HTTP request's return.
+                * 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:
                 *
-                * Returning a truthy value to the filter will short-circuit
-                * the HTTP request and return early with that value.
+                *  - 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 bool   $preempt Whether to preempt an HTTP request return. Default false.
-                * @param array  $r       HTTP request arguments.
-                * @param string $url     The request URI resource.
+                * @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;
 
                if ( function_exists( 'wp_kses_bad_protocol' ) ) {
-                       if ( $r['reject_unsafe_urls'] )
+                       if ( $r['reject_unsafe_urls'] ) {
                                $url = wp_http_validate_url( $url );
-                       $url = wp_kses_bad_protocol( $url, array( 'http', 'https', 'ssl' ) );
+                       }
+                       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 its 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
                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 ( ! wp_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'], $url );
+                       $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'];
                }
 
-               if ( '1.1' == $r['httpversion'] && !isset( $r['headers']['connection'] ) ) {
-                       $r['headers']['connection'] = 'close';
+               // Use byte limit, if we can
+               if ( isset( $r['limit_response_size'] ) ) {
+                       $options['max_bytes'] = $r['limit_response_size'];
                }
 
-               // Construct Cookie: header if any cookies are set
-               WP_Http::buildCookieHeader( $r );
+               // If we've got cookies, use and convert them to Requests_Cookie.
+               if ( ! empty( $r['cookies'] ) ) {
+                       $options['cookies'] = WP_Http::normalize_cookies( $r['cookies'] );
+               }
 
-               // Avoid issues where mbstring.func_overload is enabled
-               mbstring_binary_safe_encoding();
+               // SSL certificate handling
+               if ( ! $r['sslverify'] ) {
+                       $options['verify'] = false;
+               } else {
+                       $options['verify'] = $r['sslcertificates'];
+               }
 
-               if ( ! isset( $r['headers']['Accept-Encoding'] ) ) {
-                       if ( $encoding = WP_Http_Encoding::accept_encoding( $url, $r ) )
-                               $r['headers']['Accept-Encoding'] = $encoding;
+               // All non-GET/HEAD requests should put the arguments in the form body.
+               if ( 'HEAD' !== $type && 'GET' !== $type ) {
+                       $options['data_format'] = 'body';
                }
 
-               if ( ( ! is_null( $r['body'] ) && '' != $r['body'] ) || 'POST' == $r['method'] || 'PUT' == $r['method'] ) {
-                       if ( is_array( $r['body'] ) || is_object( $r['body'] ) ) {
-                               $r['body'] = http_build_query( $r['body'], null, '&' );
+               /**
+                * 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 ( ! isset( $r['headers']['Content-Type'] ) )
-                                       $r['headers']['Content-Type'] = 'application/x-www-form-urlencoded; charset=' . get_option( 'blog_charset' );
+                       if ( $proxy->use_authentication() ) {
+                               $options['proxy']->use_authentication = true;
+                               $options['proxy']->user = $proxy->username();
+                               $options['proxy']->pass = $proxy->password();
                        }
+               }
 
-                       if ( '' === $r['body'] )
-                               $r['body'] = null;
+               // 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 );
 
-                       if ( ! isset( $r['headers']['Content-Length'] ) && ! isset( $r['headers']['content-length'] ) )
-                               $r['headers']['Content-Length'] = strlen( $r['body'] );
-               }
+               try {
+                       $requests_response = Requests::request( $url, $headers, $data, $type, $options );
 
-               $response = $this->_dispatch_request( $url, $r );
+                       // Convert the response into an array
+                       $http_response = new WP_HTTP_Requests_Response( $requests_response, $r['filename'] );
+                       $response = $http_response->to_array();
 
-               reset_mbstring_encoding();
+                       // 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() );
+               }
 
-               if ( is_wp_error( $response ) )
+               /**
+                * 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;
+               }
 
-               // Append cookies that were used in this request to the response
-               if ( ! empty( $r['cookies'] ) ) {
-                       $cookies_set = wp_list_pluck( $response['cookies'], 'name' );
-                       foreach ( $r['cookies'] as $cookie ) {
-                               if ( ! in_array( $cookie->name, $cookies_set ) && $cookie->test( $url ) ) {
-                                       $response['cookies'][] = $cookie;
-                               }
+               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();
+
+               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 $response;
+               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
         *
-        * @return string|bool Class name for the first transport that claims to support the request. False if no transport claims to support the 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 ) {
+               $transports = array( 'curl', 'streams' );
+
                /**
-                * Filter which HTTP transports are available and in what order.
+                * Filters which HTTP transports are available and in what order.
                 *
                 * @since 3.7.0
                 *
-                * @param array  $value 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.
+                * @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', array( 'curl', 'streams' ), $args, $url );
+               $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;
 
@@ -313,11 +519,13 @@ class WP_Http {
         * 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();
@@ -332,30 +540,20 @@ class WP_Http {
 
                $response = $transports[$class]->request( $url, $args );
 
-               /**
-                * Fires after an HTTP API response is received and before the response is returned.
-                *
-                * @since 2.8.0
-                *
-                * @param mixed  $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.
-                */
+               /** 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;
 
                /**
-                * Filter the HTTP API response immediately before the response is returned.
+                * Filters the HTTP API response immediately before the response is returned.
                 *
                 * @since 2.9.0
                 *
-                * @param array|obj $response HTTP Response.
-                * @param array     $args     HTTP request arguments.
-                * @param string    $url      The request URL.
+                * @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 );
        }
@@ -368,11 +566,11 @@ class WP_Http {
         * @access public
         * @since 2.7.0
         *
-        * @param string       $url  URI resource.
+        * @param string       $url  The request URL.
         * @param string|array $args Optional. Override the defaults.
-        * @return array|object Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
+        * @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
         */
-       function post($url, $args = array()) {
+       public function post($url, $args = array()) {
                $defaults = array('method' => 'POST');
                $r = wp_parse_args( $args, $defaults );
                return $this->request($url, $r);
@@ -386,11 +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);
@@ -404,11 +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);
@@ -446,20 +644,25 @@ class WP_Http {
         *                                      Then a numbered array is returned as the value of that header-key.
         */
        public static function processHeaders( $headers, $url = '' ) {
-               // split headers, one per array element
+               // Split headers, one per array element.
                if ( is_string($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 ) <US-ASCII SP, space (32)>, <US-ASCII HT, horizontal-tab (9)> (RFC 2616 2.2)
+                       /*
+                        * Unfold folded header fields. LWS = [CRLF] 1*( SP | HT ) <US-ASCII SP, space (32)>,
+                        * <US-ASCII HT, horizontal-tab (9)> (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);
@@ -496,6 +699,9 @@ class WP_Http {
                                $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);
        }
 
@@ -514,10 +720,10 @@ class WP_Http {
         */
        public static function buildCookieHeader( &$r ) {
                if ( ! empty($r['cookies']) ) {
-                       // Upgrade any name => value cookie pairs to WP_HTTP_Cookie instances
+                       // 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 ) );
+                                       $r['cookies'][ $name ] = new WP_Http_Cookie( array( 'name' => $name, 'value' => $value ) );
                        }
 
                        $cookies_header = '';
@@ -535,7 +741,7 @@ class WP_Http {
         *
         * Based off the HTTP http_encoding_dechunk function.
         *
-        * @link http://tools.ietf.org/html/rfc2616#section-19.4.6 Process for chunked decoding.
+        * @link https://tools.ietf.org/html/rfc2616#section-19.4.6 Process for chunked decoding.
         *
         * @access public
         * @since 2.7.0
@@ -550,7 +756,9 @@ class WP_Http {
                        return $body;
 
                $parsed_body = '';
-               $body_original = $body; // We'll be altering $body, so need a backup in case of error
+
+               // We'll be altering $body, so need a backup in case of error.
+               $body_original = $body;
 
                while ( true ) {
                        $has_chunk = (bool) preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', $body, $match );
@@ -560,13 +768,13 @@ class WP_Http {
                        $length = hexdec( $match[1] );
                        $chunk_length = strlen( $match[0] );
 
-                       // Parse out the chunk of data
+                       // Parse out the chunk of data.
                        $parsed_body .= substr( $body, $chunk_length, $length );
 
-                       // Remove the chunk from the raw data
+                       // Remove the chunk from the raw data.
                        $body = substr( $body, $length + $chunk_length );
 
-                       // End of document
+                       // End of the document.
                        if ( '0' === trim( $body ) )
                                return $parsed_body;
                }
@@ -579,19 +787,22 @@ 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;
@@ -602,10 +813,10 @@ class WP_Http {
 
                $home = parse_url( get_option('siteurl') );
 
-               // Don't block requests back to ourselves by default
-               if ( $check['host'] == 'localhost' || $check['host'] == $home['host'] ) {
+               // Don't block requests back to ourselves by default.
+               if ( 'localhost' == $check['host'] || ( isset( $home['host'] ) && $home['host'] == $check['host'] ) ) {
                        /**
-                        * Filter whether to block local requests through the proxy.
+                        * Filters whether to block local requests through the proxy.
                         *
                         * @since 2.8.0
                         *
@@ -618,9 +829,9 @@ class WP_Http {
                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, '*') ) {
@@ -638,49 +849,91 @@ class WP_Http {
 
        }
 
-       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 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'];
 
@@ -692,39 +945,41 @@ class WP_Http {
         *
         * @since 3.7.0
         *
+        * @static
+        *
         * @param string $url The URL which was requested.
-        * @param array $args The Arguements which were used to make the request.
+        * @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.
         */
-       static function handle_redirects( $url, $args, $response ) {
+       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;
 
-               // Only perform redirections on redirection http codes
+               // Only perform redirections on redirection http codes.
                if ( $response['response']['code'] > 399 || $response['response']['code'] < 300 )
                        return false;
 
-               // Don't redirect if we've run out of redirects
+               // Don't redirect if we've run out of redirects.
                if ( $args['redirection']-- <= 0 )
                        return new WP_Error( 'http_request_failed', __('Too many redirects.') );
 
                $redirect_location = $response['headers']['location'];
 
-               // If there were multiple Location headers, use the last header specified
+               // If there were multiple Location headers, use the last header specified.
                if ( is_array( $redirect_location ) )
                        $redirect_location = array_pop( $redirect_location );
 
-               $redirect_location = WP_HTTP::make_absolute_url( $redirect_location, $url );
+               $redirect_location = WP_Http::make_absolute_url( $redirect_location, $url );
 
-               // POST requests should not POST to a redirected location
+               // 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';
                }
 
-               // Include valid cookies in the redirect process
+               // Include valid cookies in the redirect process.
                if ( ! empty( $response['cookies'] ) ) {
                        foreach ( $response['cookies'] as $cookie ) {
                                if ( $cookie->test( $redirect_location ) )
@@ -743,7 +998,7 @@ class WP_Http {
         * This does not verify if the IP is a valid IP, only that it appears to be
         * an IP address.
         *
-        * @see http://home.deds.nl/~aeron/regex/ for IPv6 regex
+        * @link http://home.deds.nl/~aeron/regex/ for IPv6 regex
         *
         * @since 3.7.0
         * @static
@@ -751,7 +1006,7 @@ class WP_Http {
         * @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
         */
-       static function is_ip_address( $maybe_ip ) {
+       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;
 
@@ -762,1360 +1017,3 @@ class WP_Http {
        }
 
 }
-
-/**
- * HTTP request method uses PHP Streams to retrieve the url.
- *
- * @since 2.7.0
- * @since 3.7.0 Combined with the fsockopen transport and switched to stream_socket_client().
- */
-class WP_Http_Streams {
-       /**
-        * Send a HTTP request to a URI using PHP Streams.
-        *
-        * @see WP_Http::request For default options descriptions.
-        *
-        * @since 2.7.0
-        * @since 3.7.0 Combined with the fsockopen transport and switched to stream_socket_client().
-        *
-        * @access public
-        * @param string $url URI resource.
-        * @param string|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);
-
-               $connect_host = $arrURL['host'];
-
-               $secure_transport = ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' );
-               if ( ! isset( $arrURL['port'] ) ) {
-                       if ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' ) {
-                               $arrURL['port'] = 443;
-                               $secure_transport = true;
-                       } else {
-                               $arrURL['port'] = 80;
-                       }
-               }
-
-               if ( isset( $r['headers']['Host'] ) || isset( $r['headers']['host'] ) ) {
-                       if ( isset( $r['headers']['Host'] ) )
-                               $arrURL['host'] = $r['headers']['Host'];
-                       else
-                               $arrURL['host'] = $r['headers']['host'];
-                       unset( $r['headers']['Host'], $r['headers']['host'] );
-               }
-
-               // Certain versions of PHP have issues with 'localhost' and IPv6, 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( $connect_host ) )
-                       $connect_host = '127.0.0.1';
-
-               $connect_host = $secure_transport ? 'ssl://' . $connect_host : 'tcp://' . $connect_host;
-
-               $is_local = isset( $r['local'] ) && $r['local'];
-               $ssl_verify = isset( $r['sslverify'] ) && $r['sslverify'];
-               if ( $is_local ) {
-                       /**
-                        * Filter whether SSL should be verified for local requests.
-                        *
-                        * @since 2.8.0
-                        *
-                        * @param bool $ssl_verify Whether to verify the SSL connection. Default true.
-                        */
-                       $ssl_verify = apply_filters( 'https_local_ssl_verify', $ssl_verify );
-               } elseif ( ! $is_local ) {
-                       /**
-                        * Filter 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.
-                        */
-                       $ssl_verify = apply_filters( 'https_ssl_verify', $ssl_verify );
-               }
-
-               $proxy = new WP_HTTP_Proxy();
-
-               $context = stream_context_create( array(
-                       'ssl' => array(
-                               'verify_peer' => $ssl_verify,
-                               //'CN_match' => $arrURL['host'], // This is handled by self::verify_ssl_certificate()
-                               'capture_peer_cert' => $ssl_verify,
-                               'SNI_enabled' => true,
-                               'cafile' => $r['sslcertificates'],
-                               'allow_self_signed' => ! $ssl_verify,
-                       )
-               ) );
-
-               $timeout = (int) floor( $r['timeout'] );
-               $utimeout = $timeout == $r['timeout'] ? 0 : 1000000 * $r['timeout'] % 1000000;
-               $connect_timeout = max( $timeout, 1 );
-
-               $connection_error = null; // Store error number
-               $connection_error_str = null; // Store error string
-
-               if ( !WP_DEBUG ) {
-                       // In the event that the SSL connection fails, silence the many PHP Warnings
-                       if ( $secure_transport )
-                               $error_reporting = error_reporting(0);
-
-                       if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
-                               $handle = @stream_socket_client( 'tcp://' . $proxy->host() . ':' . $proxy->port(), $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context );
-                       else
-                               $handle = @stream_socket_client( $connect_host . ':' . $arrURL['port'], $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context );
-
-                       if ( $secure_transport )
-                               error_reporting( $error_reporting );
-
-               } else {
-                       if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
-                               $handle = stream_socket_client( 'tcp://' . $proxy->host() . ':' . $proxy->port(), $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context );
-                       else
-                               $handle = stream_socket_client( $connect_host . ':' . $arrURL['port'], $connection_error, $connection_error_str, $connect_timeout, STREAM_CLIENT_CONNECT, $context );
-               }
-
-               if ( false === $handle ) {
-                       // SSL connection failed due to expired/invalid cert, or, OpenSSL configuration is broken
-                       if ( $secure_transport && 0 === $connection_error && '' === $connection_error_str )
-                               return new WP_Error( 'http_request_failed', __( 'The SSL certificate for the host could not be verified.' ) );
-
-                       return new WP_Error('http_request_failed', $connection_error . ': ' . $connection_error_str );
-               }
-
-               // Verify that the SSL certificate is valid for this request
-               if ( $secure_transport && $ssl_verify && ! $proxy->is_enabled() ) {
-                       if ( ! self::verify_ssl_certificate( $handle, $arrURL['host'] ) )
-                               return new WP_Error( 'http_request_failed', __( 'The SSL certificate for the host could not be verified.' ) );
-               }
-
-               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'] ) {
-                       stream_set_blocking( $handle, 0 );
-                       fclose( $handle );
-                       return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
-               }
-
-               $strResponse = '';
-               $bodyStarted = false;
-               $keep_reading = true;
-               $block_size = 4096;
-               if ( isset( $r['limit_response_size'] ) )
-                       $block_size = min( $block_size, $r['limit_response_size'] );
-
-               // 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'] ) );
-
-                       $bytes_written = 0;
-                       while ( ! feof($handle) && $keep_reading ) {
-                               $block = fread( $handle, $block_size );
-                               if ( ! $bodyStarted ) {
-                                       $strResponse .= $block;
-                                       if ( strpos( $strResponse, "\r\n\r\n" ) ) {
-                                               $process = WP_Http::processResponse( $strResponse );
-                                               $bodyStarted = true;
-                                               $block = $process['body'];
-                                               unset( $strResponse );
-                                               $process['body'] = '';
-                                       }
-                               }
-
-                               $this_block_size = strlen( $block );
-
-                               if ( isset( $r['limit_response_size'] ) && ( $bytes_written + $this_block_size ) > $r['limit_response_size'] )
-                                       $block = substr( $block, 0, ( $r['limit_response_size'] - $bytes_written ) );
-
-                               $bytes_written_to_file = fwrite( $stream_handle, $block );
-
-                               if ( $bytes_written_to_file != $this_block_size ) {
-                                       fclose( $handle );
-                                       fclose( $stream_handle );
-                                       return new WP_Error( 'http_request_failed', __( 'Failed to write request to temporary file.' ) );
-                               }
-
-                               $bytes_written += $bytes_written_to_file;
-
-                               $keep_reading = !isset( $r['limit_response_size'] ) || $bytes_written < $r['limit_response_size'];
-                       }
-
-                       fclose( $stream_handle );
-
-               } else {
-                       $header_length = 0;
-                       while ( ! feof( $handle ) && $keep_reading ) {
-                               $block = fread( $handle, $block_size );
-                               $strResponse .= $block;
-                               if ( ! $bodyStarted && strpos( $strResponse, "\r\n\r\n" ) ) {
-                                       $header_length = strpos( $strResponse, "\r\n\r\n" ) + 4;
-                                       $bodyStarted = true;
-                               }
-                               $keep_reading = ( ! $bodyStarted || !isset( $r['limit_response_size'] ) || strlen( $strResponse ) < ( $header_length + $r['limit_response_size'] ) );
-                       }
-
-                       $process = WP_Http::processResponse( $strResponse );
-                       unset( $strResponse );
-
-               }
-
-               fclose( $handle );
-
-               $arrHeaders = WP_Http::processHeaders( $process['headers'], $url );
-
-               $response = array(
-                       'headers' => $arrHeaders['headers'],
-                       'body' => null, // Not yet processed
-                       'response' => $arrHeaders['response'],
-                       'cookies' => $arrHeaders['cookies'],
-                       'filename' => $r['filename']
-               );
-
-               // Handle redirects
-               if ( false !== ( $redirect_response = WP_HTTP::handle_redirects( $url, $r, $response ) ) )
-                       return $redirect_response;
-
-               // 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'] );
-
-               if ( isset( $r['limit_response_size'] ) && strlen( $process['body'] ) > $r['limit_response_size'] )
-                       $process['body'] = substr( $process['body'], 0, $r['limit_response_size'] );
-
-               $response['body'] = $process['body'];
-
-               return $response;
-       }
-
-       /**
-        * Verifies the received SSL certificate against it's Common Names and subjectAltName fields
-        *
-        * PHP's SSL verifications only verify that it's a valid Certificate, it doesn't verify if
-        * the certificate is valid for the hostname which was requested.
-        * This function verifies the requested hostname against certificate's subjectAltName field,
-        * if that is empty, or contains no DNS entries, a fallback to the Common Name field is used.
-        *
-        * IP Address support is included if the request is being made to an IP address.
-        *
-        * @since 3.7.0
-        * @static
-        *
-        * @param stream $stream The PHP Stream which the SSL request is being made over
-        * @param string $host The hostname being requested
-        * @return bool If the cerficiate presented in $stream is valid for $host
-        */
-       static function verify_ssl_certificate( $stream, $host ) {
-               $context_options = stream_context_get_options( $stream );
-
-               if ( empty( $context_options['ssl']['peer_certificate'] ) )
-                       return false;
-
-               $cert = openssl_x509_parse( $context_options['ssl']['peer_certificate'] );
-               if ( ! $cert )
-                       return false;
-
-               // If the request is being made to an IP address, we'll validate against IP fields in the cert (if they exist)
-               $host_type = ( WP_HTTP::is_ip_address( $host ) ? 'ip' : 'dns' );
-
-               $certificate_hostnames = array();
-               if ( ! empty( $cert['extensions']['subjectAltName'] ) ) {
-                       $match_against = preg_split( '/,\s*/', $cert['extensions']['subjectAltName'] );
-                       foreach ( $match_against as $match ) {
-                               list( $match_type, $match_host ) = explode( ':', $match );
-                               if ( $host_type == strtolower( trim( $match_type ) ) ) // IP: or DNS:
-                                       $certificate_hostnames[] = strtolower( trim( $match_host ) );
-                       }
-               } elseif ( !empty( $cert['subject']['CN'] ) ) {
-                       // Only use the CN when the certificate includes no subjectAltName extension
-                       $certificate_hostnames[] = strtolower( $cert['subject']['CN'] );
-               }
-
-               // Exact hostname/IP matches
-               if ( in_array( strtolower( $host ), $certificate_hostnames ) )
-                       return true;
-
-               // IP's can't be wildcards, Stop processing
-               if ( 'ip' == $host_type )
-                       return false;
-
-               // Test to see if the domain is at least 2 deep for wildcard support
-               if ( substr_count( $host, '.' ) < 2 )
-                       return false;
-
-               // Wildcard subdomains certs (*.example.com) are valid for a.example.com but not a.b.example.com
-               $wildcard_host = preg_replace( '/^[^.]+\./', '*.', $host );
-
-               return in_array( strtolower( $wildcard_host ), $certificate_hostnames );
-       }
-
-       /**
-        * Whether this class can be used for retrieving a URL.
-        *
-        * @static
-        * @access public
-        * @since 2.7.0
-        * @since 3.7.0 Combined with the fsockopen transport and switched to stream_socket_client().
-        *
-        * @return boolean False means this class can not be used, true means it can.
-        */
-       public static function test( $args = array() ) {
-               if ( ! function_exists( 'stream_socket_client' ) )
-                       return false;
-
-               $is_ssl = isset( $args['ssl'] ) && $args['ssl'];
-
-               if ( $is_ssl ) {
-                       if ( ! extension_loaded( 'openssl' ) )
-                               return false;
-                       if ( ! function_exists( 'openssl_x509_parse' ) )
-                               return false;
-               }
-
-               /**
-                * Filter whether streams can be used as a transport for retrieving a URL.
-                *
-                * @since 2.7.0
-                *
-                * @param bool  $use_class Whether the class can be used. Default true.
-                * @param array $args      Request arguments.
-                */
-               return apply_filters( 'use_streams_transport', true, $args );
-       }
-}
-
-/**
- * Deprecated HTTP Transport method which used fsockopen.
- *
- * This class is not used, and is included for backwards compatibility only.
- * All code should make use of WP_HTTP directly through it's API.
- *
- * @see WP_HTTP::request
- *
- * @since 2.7.0
- * @deprecated 3.7.0 Please use WP_HTTP::request() directly
- */
-class WP_HTTP_Fsockopen extends WP_HTTP_Streams {
-       // For backwards compatibility for users who are using the class directly
-}
-
-/**
- * HTTP request method uses Curl extension to retrieve the url.
- *
- * Requires the Curl extension to be installed.
- *
- * @package WordPress
- * @subpackage HTTP
- * @since 2.7.0
- */
-class WP_Http_Curl {
-
-       /**
-        * Temporary header storage for during requests.
-        *
-        * @since 3.2.0
-        * @access private
-        * @var string
-        */
-       private $headers = '';
-
-       /**
-        * Temporary body storage for during requests.
-        *
-        * @since 3.6.0
-        * @access private
-        * @var string
-        */
-       private $body = '';
-
-       /**
-        * The maximum amount of data to receive from the remote server.
-        *
-        * @since 3.6.0
-        * @access private
-        * @var int
-        */
-       private $max_body_length = false;
-
-       /**
-        * The file resource used for streaming to file.
-        *
-        * @since 3.6.0
-        * @access private
-        * @var resource
-        */
-       private $stream_handle = false;
-
-       /**
-        * 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 ) {
-                       /** This filter is documented in wp-includes/class-http.php */
-                       $ssl_verify = apply_filters( 'https_local_ssl_verify', $ssl_verify );
-               } elseif ( ! $is_local ) {
-                       /** This filter is documented in wp-includes/class-http.php */
-                       $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_CAINFO, $r['sslcertificates'] );
-               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 );
-               if ( defined( 'CURLOPT_PROTOCOLS' ) ) // PHP 5.2.10 / cURL 7.19.4
-                       curl_setopt( $handle, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS );
-
-               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 ( ! is_null( $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_WRITEFUNCTION, array( $this, 'stream_body' ) );
-               }
-
-               curl_setopt( $handle, CURLOPT_HEADER, false );
-
-               if ( isset( $r['limit_response_size'] ) )
-                       $this->max_body_length = intval( $r['limit_response_size'] );
-               else
-                       $this->max_body_length = false;
-
-               // If streaming to a file open a file handle, and setup our curl streaming handler
-               if ( $r['stream'] ) {
-                       if ( ! WP_DEBUG )
-                               $this->stream_handle = @fopen( $r['filename'], 'w+' );
-                       else
-                               $this->stream_handle = fopen( $r['filename'], 'w+' );
-                       if ( ! $this->stream_handle )
-                               return new WP_Error( 'http_request_failed', sprintf( __( 'Could not open handle for fopen() to %s' ), $r['filename'] ) );
-               } else {
-                       $this->stream_handle = false;
-               }
-
-               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( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1 );
-
-               /**
-                * Fires before the cURL request is executed.
-                *
-                * Cookies are not currently handled by the HTTP API. This action allows
-                * plugins to handle cookies themselves.
-                *
-                * @since 2.8.0
-                *
-                * @param resource &$handle The cURL handle returned by curl_init().
-                * @param array    $r       The HTTP request arguments.
-                * @param string   $url     The destination URL.
-                */
-               do_action_ref_array( 'http_api_curl', array( &$handle, $r, $url ) );
-
-               // We don't need to return the body, so don't. Just execute request and return.
-               if ( ! $r['blocking'] ) {
-                       curl_exec( $handle );
-
-                       if ( $curl_error = curl_error( $handle ) ) {
-                               curl_close( $handle );
-                               return new WP_Error( 'http_request_failed', $curl_error );
-                       }
-                       if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array( 301, 302 ) ) ) {
-                               curl_close( $handle );
-                               return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) );
-                       }
-
-                       curl_close( $handle );
-                       return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
-               }
-
-               $theResponse = curl_exec( $handle );
-               $theHeaders = WP_Http::processHeaders( $this->headers, $url );
-               $theBody = $this->body;
-
-               $this->headers = '';
-               $this->body = '';
-
-               $curl_error = curl_errno( $handle );
-
-               // If an error occured, or, no response
-               if ( $curl_error || ( 0 == strlen( $theBody ) && empty( $theHeaders['headers'] ) ) ) {
-                       if ( CURLE_WRITE_ERROR /* 23 */ == $curl_error &&  $r['stream'] ) {
-                               fclose( $this->stream_handle );
-                               return new WP_Error( 'http_request_failed', __( 'Failed to write request to temporary file.' ) );
-                       }
-                       if ( $curl_error = curl_error( $handle ) ) {
-                               curl_close( $handle );
-                               return new WP_Error( 'http_request_failed', $curl_error );
-                       }
-                       if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array( 301, 302 ) ) ) {
-                               curl_close( $handle );
-                               return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) );
-                       }
-               }
-
-               $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( $this->stream_handle );
-
-               $response = array(
-                       'headers' => $theHeaders['headers'],
-                       'body' => null,
-                       'response' => $response,
-                       'cookies' => $theHeaders['cookies'],
-                       'filename' => $r['filename']
-               );
-
-               // Handle redirects
-               if ( false !== ( $redirect_response = WP_HTTP::handle_redirects( $url, $r, $response ) ) )
-                       return $redirect_response;
-
-               if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders['headers']) )
-                       $theBody = WP_Http_Encoding::decompress( $theBody );
-
-               $response['body'] = $theBody;
-
-               return $response;
-       }
-
-       /**
-        * 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 );
-       }
-
-       /**
-        * Grab the body of the cURL request
-        *
-        * The contents of the document are passed in chunks, so we append to the $body property for temporary storage.
-        * Returning a length shorter than the length of $data passed in will cause cURL to abort the request as "completed"
-        *
-        * @since 3.6.0
-        * @access private
-        * @return int
-        */
-       private function stream_body( $handle, $data ) {
-               $data_length = strlen( $data );
-
-               if ( $this->max_body_length && ( strlen( $this->body ) + $data_length ) > $this->max_body_length )
-                       $data = substr( $data, 0, ( $this->max_body_length - $data_length ) );
-
-               if ( $this->stream_handle ) {
-                       $bytes_written = fwrite( $this->stream_handle, $data );
-               } else {
-                       $this->body .= $data;
-                       $bytes_written = $data_length;
-               }
-
-               // Upon event of this function returning less than strlen( $data ) curl will error with CURLE_WRITE_ERROR
-               return $bytes_written;
-       }
-
-       /**
-        * 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;
-               }
-
-               /**
-                * Filter whether cURL can be used as a transport for retrieving a URL.
-                *
-                * @since 2.7.0
-                *
-                * @param bool  $use_class Whether the class can be used. Default true.
-                * @param array $args      An array of request arguments.
-                */
-               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:
- * <ol>
- * <li>WP_PROXY_HOST - Enable proxy support and host for connecting.</li>
- * <li>WP_PROXY_PORT - Proxy port for connection. No default, must be defined.</li>
- * <li>WP_PROXY_USERNAME - Proxy username, if it requires authentication.</li>
- * <li>WP_PROXY_PASSWORD - Proxy password, if it requires authentication.</li>
- * <li>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</li>
- * </ol>
- *
- * An example can be as seen below.
- * <code>
- * define('WP_PROXY_HOST', '192.168.84.101');
- * define('WP_PROXY_PORT', '8080');
- * define('WP_PROXY_BYPASS_HOSTS', 'localhost, www.example.com, *.wordpress.org');
- * </code>
- *
- * @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 2.8.0
- */
-class WP_HTTP_Proxy {
-
-       /**
-        * Whether proxy connection should be used.
-        *
-        * @since 2.8.0
-        *
-        * @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 2.8.0
-        *
-        * @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 2.8.0
-        *
-        * @return string
-        */
-       function host() {
-               if ( defined('WP_PROXY_HOST') )
-                       return WP_PROXY_HOST;
-
-               return '';
-       }
-
-       /**
-        * Retrieve the port for the proxy server.
-        *
-        * @since 2.8.0
-        *
-        * @return string
-        */
-       function port() {
-               if ( defined('WP_PROXY_PORT') )
-                       return WP_PROXY_PORT;
-
-               return '';
-       }
-
-       /**
-        * Retrieve the username for proxy authentication.
-        *
-        * @since 2.8.0
-        *
-        * @return string
-        */
-       function username() {
-               if ( defined('WP_PROXY_USERNAME') )
-                       return WP_PROXY_USERNAME;
-
-               return '';
-       }
-
-       /**
-        * Retrieve the password for proxy authentication.
-        *
-        * @since 2.8.0
-        *
-        * @return string
-        */
-       function password() {
-               if ( defined('WP_PROXY_PASSWORD') )
-                       return WP_PROXY_PASSWORD;
-
-               return '';
-       }
-
-       /**
-        * Retrieve authentication string for proxy authentication.
-        *
-        * @since 2.8.0
-        *
-        * @return string
-        */
-       function authentication() {
-               return $this->username() . ':' . $this->password();
-       }
-
-       /**
-        * Retrieve header string for proxy authentication.
-        *
-        * @since 2.8.0
-        *
-        * @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') );
-
-               /**
-                * Filter whether to preempt sending the request through the proxy server.
-                *
-                * Returning false will bypass the proxy; returning true will send
-                * the request through the proxy. Returning null bypasses the filter.
-                *
-                * @since 3.5.0
-                *
-                * @param null   $override Whether to override the request result. Default null.
-                * @param string $uri      URL to check.
-                * @param array  $check    Associative array result of parsing the URI.
-                * @param array  $home     Associative array result of parsing the site URL.
-                */
-               $result = apply_filters( 'pre_http_send_through_proxy', null, $uri, $check, $home );
-               if ( ! is_null( $result ) )
-                       return $result;
-
-               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( '\*', '.+', 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:
-        * <ol>
-        * <li>Name</li>
-        * <li>Value - should NOT be urlencoded already.</li>
-        * <li>Expires - (optional) String or int (UNIX timestamp).</li>
-        * <li>Path (optional)</li>
-        * <li>Domain (optional)</li>
-        * <li>Port (optional)</li>
-        * </ol>
-        *
-        * @access public
-        * @since 2.8.0
-        *
-        * @param string|array $data Raw cookie data.
-        * @param string $requested_url The URL which the cookie was set on, used for default 'domain' and 'port' values
-        */
-       function __construct( $data, $requested_url = '' ) {
-               if ( $requested_url )
-                       $arrURL = @parse_url( $requested_url );
-               if ( isset( $arrURL['host'] ) )
-                       $this->domain = $arrURL['host'];
-               $this->path = isset( $arrURL['path'] ) ? $arrURL['path'] : '/';
-               if (  '/' != substr( $this->path, -1 ) )
-                       $this->path = dirname( $this->path ) . '/';
-
-               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
-                       foreach ( array( 'name', 'value', 'path', 'domain', 'port' ) as $field ) {
-                               if ( isset( $data[ $field ] ) )
-                                       $this->$field = $data[ $field ];
-                       }
-
-                       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 ) {
-               if ( is_null( $this->name ) )
-                       return false;
-
-               // Expires - if expired then nothing else matters
-               if ( isset( $this->expires ) && 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'] : ( 'https' == $url['scheme'] ? 443 : 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   : null;
-               $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 ( !empty( $port ) && !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 ( ! isset( $this->name ) || ! isset( $this->value ) )
-                       return '';
-
-               /**
-                * Filter the header-encoded cookie value.
-                *
-                * @since 3.4.0
-                *
-                * @param string $value The cookie value.
-                * @param string $name  The cookie name.
-                */
-               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 2.8.0
- * @package WordPress
- * @subpackage HTTP
- */
-class WP_Http_Encoding {
-
-       /**
-        * Compress raw string using the deflate format.
-        *
-        * Supports the RFC 1951 standard.
-        *
-        * @since 2.8.0
-        *
-        * @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 2.8.0
-        *
-        * @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 gzinflate()
-        * 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 2.8.0
-        *
-        * @return string Types of encoding to accept.
-        */
-       public static function accept_encoding( $url, $args ) {
-               $type = array();
-               $compression_enabled = WP_Http_Encoding::is_available();
-
-               if ( ! $args['decompress'] ) // decompression specifically disabled
-                       $compression_enabled = false;
-               elseif ( $args['stream'] ) // disable when streaming to file
-                       $compression_enabled = false;
-               elseif ( isset( $args['limit_response_size'] ) ) // If only partial content is being requested, we won't be able to decompress it
-                       $compression_enabled = false;
-
-               if ( $compression_enabled ) {
-                       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';
-               }
-
-               /**
-                * Filter the allowed encoding types.
-                *
-                * @since 3.6.0
-                *
-                * @param array  $type Encoding types allowed. Accepts 'gzinflate',
-                *                     'gzuncompress', 'gzdecode'.
-                * @param string $url  URL of the HTTP request.
-                * @param array  $args HTTP request arguments.
-                */
-               $type = apply_filters( 'wp_http_accept_encoding', $type, $url, $args );
-
-               return implode(', ', $type);
-       }
-
-       /**
-        * What encoding the content used when it was compressed to send in the headers.
-        *
-        * @since 2.8.0
-        *
-        * @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 2.8.0
-        *
-        * @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 2.8.0
-        *
-        * @return bool
-        */
-       public static function is_available() {
-               return ( function_exists('gzuncompress') || function_exists('gzdeflate') || function_exists('gzinflate') );
-       }
-}