]> scripts.mit.edu Git - autoinstalls/wordpress.git/blobdiff - wp-includes/class-http.php
Wordpress 3.5.2
[autoinstalls/wordpress.git] / wp-includes / class-http.php
index a68711c8cd95fa1f8a4b96482c45d9fcf6716eaa..0358932ac877b25bdc875ca1f756e11a58a83d14 100644 (file)
@@ -86,7 +86,8 @@ class WP_Http {
                        'timeout' => apply_filters( 'http_request_timeout', 5),
                        'redirection' => apply_filters( 'http_request_redirection_count', 5),
                        'httpversion' => apply_filters( 'http_request_version', '1.0'),
-                       'user-agent' => apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )  ),
+                       'user-agent' => apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ) ),
+                       'reject_unsafe_urls' => apply_filters( 'http_request_reject_unsafe_urls', false ),
                        'blocking' => true,
                        'headers' => array(),
                        'cookies' => array(),
@@ -98,7 +99,6 @@ class WP_Http {
                        'filename' => null
                );
 
-
                // Pre-parse for the HEAD checks.
                $args = wp_parse_args( $args );
 
@@ -109,15 +109,21 @@ class WP_Http {
                $r = wp_parse_args( $args, $defaults );
                $r = apply_filters( 'http_request_args', $r, $url );
 
-               // Certain classes decrement this, store a copy of the original value for loop purposes.
-               $r['_redirection'] = $r['redirection'];
+               // The transports decrement this, store a copy of the original value for loop purposes.
+               if ( ! isset( $r['_redirection'] ) )
+                       $r['_redirection'] = $r['redirection'];
 
                // Allow plugins to short-circuit the request
                $pre = apply_filters( 'pre_http_request', false, $r, $url );
                if ( false !== $pre )
                        return $pre;
 
-               $arrURL = parse_url( $url );
+               if ( $r['reject_unsafe_urls'] )
+                       $url = wp_http_validate_url( $url );
+               if ( function_exists( 'wp_kses_bad_protocol' ) )
+                       $url = wp_kses_bad_protocol( $url, array( 'http', 'https', 'ssl' ) );
+
+               $arrURL = @parse_url( $url );
 
                if ( empty( $url ) || empty( $arrURL['scheme'] ) )
                        return new WP_Error('http_request_failed', __('A valid URL was not provided.'));
@@ -142,7 +148,7 @@ class WP_Http {
                // Force some settings if we are streaming to a file and check for existence and perms of destination directory
                if ( $r['stream'] ) {
                        $r['blocking'] = true;
-                       if ( ! is_writable( dirname( $r['filename'] ) ) )
+                       if ( ! call_user_func( 'WIN' === strtoupper( substr( PHP_OS, 0, 3 ) ) ? 'win_is_writable' : 'is_writable', dirname( $r['filename'] ) ) )
                                return new WP_Error( 'http_request_failed', __( 'Destination directory for file streaming does not exist or is not writable.' ) );
                }
 
@@ -170,21 +176,17 @@ class WP_Http {
                if ( WP_Http_Encoding::is_available() )
                        $r['headers']['Accept-Encoding'] = WP_Http_Encoding::accept_encoding();
 
-               if ( empty($r['body']) ) {
-                       $r['body'] = null;
-                       // Some servers fail when sending content without the content-length header being set.
-                       // Also, to fix another bug, we only send when doing POST and PUT and the content-length
-                       // header isn't already set.
-                       if ( ($r['method'] == 'POST' || $r['method'] == 'PUT') && ! isset( $r['headers']['Content-Length'] ) )
-                               $r['headers']['Content-Length'] = 0;
-               } else {
+               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, '&' );
+
                                if ( ! isset( $r['headers']['Content-Type'] ) )
                                        $r['headers']['Content-Type'] = 'application/x-www-form-urlencoded; charset=' . get_option( 'blog_charset' );
-                               $r['headers']['Content-Length'] = strlen( $r['body'] );
                        }
 
+                       if ( '' === $r['body'] )
+                               $r['body'] = null;
+
                        if ( ! isset( $r['headers']['Content-Length'] ) && ! isset( $r['headers']['content-length'] ) )
                                $r['headers']['Content-Length'] = strlen( $r['body'] );
                }
@@ -201,7 +203,7 @@ class WP_Http {
         * @param array $args Request arguments
         * @param string $url URL to Request
         *
-        * @return string|false Class name for the first transport that claims to support the request.  False if no transport claims to support the request.
+        * @return string|bool Class name for the first transport that claims to support the request. False if no transport claims to support the request.
         */
        public function _get_first_available_transport( $args, $url = null ) {
                $request_order = array( 'curl', 'streams', 'fsockopen' );
@@ -383,18 +385,18 @@ class WP_Http {
 
                        list($key, $value) = explode(':', $tempheader, 2);
 
-                       if ( !empty( $value ) ) {
-                               $key = strtolower( $key );
-                               if ( isset( $newheaders[$key] ) ) {
-                                       if ( !is_array($newheaders[$key]) )
-                                               $newheaders[$key] = array($newheaders[$key]);
-                                       $newheaders[$key][] = trim( $value );
-                               } else {
-                                       $newheaders[$key] = trim( $value );
-                               }
-                               if ( 'set-cookie' == $key )
-                                       $cookies[] = new WP_Http_Cookie( $value );
+                       $key = strtolower( $key );
+                       $value = trim( $value );
+
+                       if ( isset( $newheaders[ $key ] ) ) {
+                               if ( ! is_array( $newheaders[ $key ] ) )
+                                       $newheaders[$key] = array( $newheaders[ $key ] );
+                               $newheaders[ $key ][] = $value;
+                       } else {
+                               $newheaders[ $key ] = $value;
                        }
+                       if ( 'set-cookie' == $key )
+                               $cookies[] = new WP_Http_Cookie( $value );
                }
 
                return array('response' => $response, 'headers' => $newheaders, 'cookies' => $cookies);
@@ -430,6 +432,8 @@ class WP_Http {
         * Based off the HTTP http_encoding_dechunk function. Does not support UTF-8. Does not support
         * returning footer headers. Shouldn't be too difficult to support it though.
         *
+        * @link http://tools.ietf.org/html/rfc2616#section-19.4.6 Process for chunked decoding.
+        *
         * @todo Add support for footer chunked headers.
         * @access public
         * @since 2.7.0
@@ -535,8 +539,55 @@ class WP_Http {
                else
                        return !in_array( $check['host'], $accessible_hosts ); //Inverse logic, If its in the array, then we can't access it.
 
+       }
+
+       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, '://' ) )
+                       return $maybe_relative_path;
+
+               if ( ! $url_parts = @parse_url( $url ) )
+                       return $maybe_relative_path;
+
+               if ( ! $relative_url_parts = @parse_url( $maybe_relative_path ) )
+                       return $maybe_relative_path;
+
+               $absolute_path = $url_parts['scheme'] . '://' . $url_parts['host'];
+               if ( isset( $url_parts['port'] ) )
+                       $absolute_path .= ':' . $url_parts['port'];
+
+               // Start off with the Absolute URL path
+               $path = ! empty( $url_parts['path'] ) ? $url_parts['path'] : '/';
+
+               // If the it's a root-relative path, then great
+               if ( ! empty( $relative_url_parts['path'] ) && '/' == $relative_url_parts['path'][0] ) {
+                       $path = $relative_url_parts['path'];
 
+               // Else it's a relative path
+               } elseif ( ! empty( $relative_url_parts['path'] ) ) {
+                       // Strip off any file components from the absolute path
+                       $path = substr( $path, 0, strrpos( $path, '/' ) + 1 );
 
+                       // Build the new path
+                       $path .= $relative_url_parts['path'];
+
+                       // Strip all /path/../ out of the path
+                       while ( strpos( $path, '../' ) > 1 ) {
+                               $path = preg_replace( '![^/]+/\.\./!', '', $path );
+                       }
+
+                       // Strip any final leading ../ from the path
+                       $path = preg_replace( '!^/(\.\./)+!', '', $path );
+               }
+
+               // Add the Query string
+               if ( ! empty( $relative_url_parts['query'] ) )
+                       $path .= '?' . $relative_url_parts['query'];
+
+               return $absolute_path . '/' . ltrim( $path, '/' );
        }
 }
 
@@ -733,7 +784,7 @@ class WP_Http_Fsockopen {
                // If location is found, then assume redirect and redirect to location.
                if ( isset($arrHeaders['headers']['location']) && 0 !== $r['_redirection'] ) {
                        if ( $r['redirection']-- > 0 ) {
-                               return $this->request($arrHeaders['headers']['location'], $r);
+                               return wp_remote_request( WP_HTTP::make_absolute_url( $arrHeaders['headers']['location'], $url ), $r);
                        } else {
                                return new WP_Error('http_request_failed', __('Too many redirects.'));
                        }
@@ -760,7 +811,7 @@ class WP_Http_Fsockopen {
                if ( ! function_exists( 'fsockopen' ) )
                        return false;
 
-               if ( false !== ($option = get_option( 'disable_fsockopen' )) && time()-$option < 43200 ) // 12 hours
+               if ( false !== ( $option = get_option( 'disable_fsockopen' ) ) && time() - $option < 12 * HOUR_IN_SECONDS )
                        return false;
 
                $is_ssl = isset( $args['ssl'] ) && $args['ssl'];
@@ -843,7 +894,8 @@ class WP_Http_Streams {
                        array(
                                'method' => strtoupper($r['method']),
                                'user_agent' => $r['user-agent'],
-                               'max_redirects' => $r['redirection'] + 1, // See #11557
+                               'max_redirects' => 0, // Follow no redirects
+                               'follow_redirects' => false,
                                'protocol_version' => (float) $r['httpversion'],
                                'header' => $strHeaders,
                                'ignore_errors' => true, // Return non-200 requests.
@@ -866,7 +918,7 @@ class WP_Http_Streams {
                                $arrContext['http']['header'] .= $proxy->authentication_header() . "\r\n";
                }
 
-               if ( ! empty($r['body'] ) )
+               if ( ! is_null( $r['body'] ) )
                        $arrContext['http']['content'] = $r['body'];
 
                $context = stream_context_create($arrContext);
@@ -916,10 +968,13 @@ class WP_Http_Streams {
                else
                        $processedHeaders = WP_Http::processHeaders($meta['wrapper_data']);
 
-               // Streams does not provide an error code which we can use to see why the request stream stopped.
-               // We can however test to see if a location header is present and return based on that.
-               if ( isset($processedHeaders['headers']['location']) && 0 !== $args['_redirection'] )
-                       return new WP_Error('http_request_failed', __('Too many redirects.'));
+               if ( ! empty( $processedHeaders['headers']['location'] ) && 0 !== $r['_redirection'] ) { // _redirection: The requested number of redirections
+                       if ( $r['redirection']-- > 0 ) {
+                               return wp_remote_request( WP_HTTP::make_absolute_url( $processedHeaders['headers']['location'], $url ), $r );
+                       } else {
+                               return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) );
+                       }
+               }
 
                if ( ! empty( $strResponse ) && isset( $processedHeaders['headers']['transfer-encoding'] ) && 'chunked' == $processedHeaders['headers']['transfer-encoding'] )
                        $strResponse = WP_Http::chunkTransferDecode($strResponse);
@@ -1023,15 +1078,14 @@ class WP_Http_Curl {
                        }
                }
 
-               $is_local = isset($args['local']) && $args['local'];
-               $ssl_verify = isset($args['sslverify']) && $args['sslverify'];
+               $is_local = isset($r['local']) && $r['local'];
+               $ssl_verify = isset($r['sslverify']) && $r['sslverify'];
                if ( $is_local )
                        $ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify);
                elseif ( ! $is_local )
                        $ssl_verify = apply_filters('https_ssl_verify', $ssl_verify);
 
-
-               // CURLOPT_TIMEOUT and CURLOPT_CONNECTTIMEOUT expect integers.  Have to use ceil since
+               // 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 );
@@ -1042,7 +1096,11 @@ class WP_Http_Curl {
                curl_setopt( $handle, CURLOPT_SSL_VERIFYHOST, ( $ssl_verify === true ) ? 2 : false );
                curl_setopt( $handle, CURLOPT_SSL_VERIFYPEER, $ssl_verify );
                curl_setopt( $handle, CURLOPT_USERAGENT, $r['user-agent'] );
-               curl_setopt( $handle, CURLOPT_MAXREDIRS, $r['redirection'] );
+               // 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':
@@ -1056,10 +1114,15 @@ class WP_Http_Curl {
                                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_HEADERFUNCTION, array( $this, 'stream_headers' ) );
 
                curl_setopt( $handle, CURLOPT_HEADER, false );
 
@@ -1074,10 +1137,6 @@ class WP_Http_Curl {
                        curl_setopt( $handle, CURLOPT_FILE, $stream_handle );
                }
 
-               // The option doesn't work with safe mode or when open_basedir is set.
-               if ( !ini_get('safe_mode') && !ini_get('open_basedir') && 0 !== $r['_redirection'] )
-                       curl_setopt( $handle, CURLOPT_FOLLOWLOCATION, true );
-
                if ( !empty( $r['headers'] ) ) {
                        // cURL expects full header strings in each element
                        $headers = array();
@@ -1110,12 +1169,12 @@ class WP_Http_Curl {
                if ( strlen($theResponse) > 0 && ! is_bool( $theResponse ) ) // is_bool: when using $args['stream'], curl_exec will return (bool)true
                        $theBody = $theResponse;
 
-               // If no response, and It's not a HEAD request with valid headers returned
-               if ( 0 == strlen($theResponse) && ('HEAD' != $args['method'] || empty($this->headers)) ) {
-                       if ( $curl_error = curl_error($handle) )
-                               return new WP_Error('http_request_failed', $curl_error);
-                       if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array(301, 302) ) )
-                               return new WP_Error('http_request_failed', __('Too many redirects.'));
+               // If no response
+               if ( 0 == strlen( $theResponse ) && empty( $theHeaders['headers'] ) ) {
+                       if ( $curl_error = curl_error( $handle ) )
+                               return new WP_Error( 'http_request_failed', $curl_error );
+                       if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array( 301, 302 ) ) )
+                               return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) );
                }
 
                $this->headers = '';
@@ -1130,9 +1189,9 @@ class WP_Http_Curl {
                        fclose( $stream_handle );
 
                // See #11305 - When running under safe mode, redirection is disabled above. Handle it manually.
-               if ( ! empty( $theHeaders['headers']['location'] ) && ( ini_get( 'safe_mode' ) || ini_get( 'open_basedir' ) ) && 0 !== $r['_redirection'] ) {
+               if ( ! empty( $theHeaders['headers']['location'] ) && 0 !== $r['_redirection'] ) { // _redirection: The requested number of redirections
                        if ( $r['redirection']-- > 0 ) {
-                               return $this->request( $theHeaders['headers']['location'], $r );
+                               return wp_remote_request( WP_HTTP::make_absolute_url( $theHeaders['headers']['location'], $url ), $r );
                        } else {
                                return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) );
                        }
@@ -1344,6 +1403,10 @@ class WP_HTTP_Proxy {
 
                $home = parse_url( get_option('siteurl') );
 
+               $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;
 
@@ -1494,11 +1557,11 @@ class WP_Http_Cookie {
         * @since 2.8.0
         *
         * @param string $url URL you intend to send this cookie to
-        * @return boolean TRUE if allowed, FALSE otherwise.
+        * @return boolean true if allowed, false otherwise.
         */
        function test( $url ) {
                // Expires - if expired then nothing else matters
-               if ( time() > $this->expires )
+               if ( isset( $this->expires ) && time() > $this->expires )
                        return false;
 
                // Get details on the URL we're thinking about sending to
@@ -1538,10 +1601,10 @@ class WP_Http_Cookie {
         * @return string Header encoded cookie name and value.
         */
        function getHeaderValue() {
-               if ( empty( $this->name ) || empty( $this->value ) )
+               if ( ! isset( $this->name ) || ! isset( $this->value ) )
                        return '';
 
-               return $this->name . '=' . urlencode( $this->value );
+               return $this->name . '=' . apply_filters( 'wp_http_cookie_value', $this->value, $this->name );
        }
 
        /**
@@ -1625,7 +1688,7 @@ class WP_Http_Encoding {
        /**
         * Decompression of deflated string while staying compatible with the majority of servers.
         *
-        * Certain Servers will return deflated data with headers which PHP's gziniflate()
+        * 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.
         *