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simple CORS proxy in php
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| <?php | |
| error_reporting( error_reporting() & ~E_NOTICE ); // evil | |
| // config | |
| $enable_jsonp = false; | |
| $enable_native = false; | |
| $valid_url_regex = '/.*/'; | |
| // ############################################################################ | |
| $url = $_GET['url']; | |
| if ( !$url ) { | |
| // Passed url not specified. | |
| $contents = 'ERROR: url not specified'; | |
| $status = array( 'http_code' => 'ERROR' ); | |
| } else if ( !preg_match( $valid_url_regex, $url ) ) { | |
| // Passed url doesn't match $valid_url_regex. | |
| $contents = 'ERROR: invalid url'; | |
| $status = array( 'http_code' => 'ERROR' ); | |
| } else { | |
| $ch = curl_init( $url ); | |
| // @lf get domain from url and keep it around | |
| $parts = parse_url( $url ); | |
| $domain = $parts['scheme']."://".$parts['host']; | |
| if ( strtolower($_SERVER['REQUEST_METHOD']) == 'post' ) { | |
| curl_setopt( $ch, CURLOPT_POST, true ); | |
| curl_setopt( $ch, CURLOPT_POSTFIELDS, $_POST ); | |
| } | |
| if ( $_GET['send_cookies'] ) { | |
| $cookie = array(); | |
| foreach ( $_COOKIE as $key => $value ) { | |
| $cookie[] = $key . '=' . $value; | |
| } | |
| if ( $_GET['send_session'] ) { | |
| $cookie[] = SID; | |
| } | |
| $cookie = implode( '; ', $cookie ); | |
| curl_setopt( $ch, CURLOPT_COOKIE, $cookie ); | |
| } | |
| curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, true ); | |
| curl_setopt( $ch, CURLOPT_HEADER, true ); | |
| curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true ); | |
| curl_setopt( $ch, CURLOPT_ENCODING ,""); // @lf guess encoding automagically | |
| curl_setopt( $ch, CURLOPT_USERAGENT, $_GET['user_agent'] ? $_GET['user_agent'] : $_SERVER['HTTP_USER_AGENT'] ); | |
| list( $header, $contents ) = preg_split( '/([\r\n][\r\n])\\1/', curl_exec( $ch ), 2 ); | |
| // @lf filter any relative urls and replace them with absolute urls | |
| $rep['/href="(?!https?:\/\/)(?!data:)(?!#)/'] = 'href="'.$domain; | |
| $rep['/src="(?!https?:\/\/)(?!data:)(?!#)/'] = 'src="'.$domain; | |
| $rep['/href=\'(?!https?:\/\/)(?!data:)(?!#)/'] = 'href="'.$domain; | |
| $rep['/src=\'(?!https?:\/\/)(?!data:)(?!#)/'] = 'src="'.$domain; | |
| $rep['/@import[\n+\s+]"\//'] = '@import "'.$domain; | |
| $rep['/@import[\n+\s+]"\./'] = '@import "'.$domain; | |
| // @lf warning: clears previous contents | |
| $contents = preg_replace(array_keys($rep), array_values($rep), $contents); | |
| $status = curl_getinfo( $ch ); | |
| curl_close( $ch ); | |
| } | |
| // Split header text into an array. | |
| $header_text = preg_split( '/[\r\n]+/', $header ); | |
| if ( $_GET['mode'] == 'native' ) { | |
| if ( !$enable_native ) { | |
| $contents = 'ERROR: invalid mode'; | |
| $status = array( 'http_code' => 'ERROR' ); | |
| } | |
| // Propagate headers to response. | |
| foreach ( $header_text as $header ) { | |
| if ( preg_match( '/^(?:Content-Type|Content-Language|Set-Cookie):/i', $header ) ) { | |
| header( $header ); | |
| } | |
| } | |
| print $contents; | |
| } else { | |
| // $data will be serialized into JSON data. | |
| $data = array(); | |
| // Propagate all HTTP headers into the JSON data object. | |
| if ( $_GET['full_headers'] ) { | |
| $data['headers'] = array(); | |
| foreach ( $header_text as $header ) { | |
| preg_match( '/^(.+?):\s+(.*)$/', $header, $matches ); | |
| if ( $matches ) { | |
| $data['headers'][ $matches[1] ] = $matches[2]; | |
| } | |
| } | |
| } | |
| // Propagate all cURL request / response info to the JSON data object. | |
| if ( $_GET['full_status'] ) { | |
| $data['status'] = $status; | |
| } else { | |
| $data['status'] = array(); | |
| $data['status']['http_code'] = $status['http_code']; | |
| } | |
| // Set the JSON data object contents, decoding it from JSON if possible. | |
| $decoded_json = json_decode( $contents ); | |
| $data['contents'] = $decoded_json ? $decoded_json : $contents; | |
| // Generate appropriate content-type header. | |
| $is_xhr = strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest'; | |
| header( 'Content-type: application/' . ( $is_xhr ? 'json' : 'x-javascript' ) ); | |
| // Get JSONP callback. | |
| $jsonp_callback = $enable_jsonp && isset($_GET['callback']) ? $_GET['callback'] : null; | |
| // Generate JSON/JSONP string | |
| $json = json_encode( $data ); | |
| print $jsonp_callback ? "$jsonp_callback($json)" : $json; | |
| } | |
| ?> |
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