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简单的php代理 Simple PHP Proxyphp proxy

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index.php

proxy.php

<?PHP // Script: Simple PHP Proxy: Get external HTML, JSON and more! // // *Version: 1.6, Last updated: 1/24/2009* // // Project Home - http://benalman.com/projects/php-simple-proxy/ // GitHub - http:///cowboy/php-simple-proxy/ // Source - http:///cowboy/php-simple-proxy/raw/master/ba-simple-proxy.php // // About: License // // Copyright (c) 2010 "Cowboy" Ben Alman, // Dual licensed under the MIT and GPL licenses. // http://benalman.com/about/license/ // // About: Examples // // This working example, complete with fully commented code, illustrates one way // in which this PHP script can be used. // // Simple - http://benalman.com/code/projects/php-simple-proxy/examples/simple/ // // About: Release History // // 1.6 - (1/24/2009) Now defaults to JSON mode, which can now be changed to // native mode by specifying ?mode=native. Native and JSONP modes are // disabled by default because of possible XSS vulnerability issues, but // are configurable in the PHP script along with a url validation regex. // 1.5 - (12/27/2009) Initial release // // Topic: GET Parameters // // Certain GET (query string) parameters may be passed into ba-simple-proxy.php // to control its behavior, this is a list of these parameters. // // url - The remote URL resource to fetch. Any GET parameters to be passed // through to the remote URL resource must be urlencoded in this parameter. // mode - If mode=native, the response will be sent using the same content // type and headers that the remote URL resource returned. If omitted, the // response will be JSON (or JSONP). <Native requests> and <JSONP requests> // are disabled by default, see <Configuration Options> for more information. // callback - If specified, the response JSON will be wrapped in this named // function call. This parameter and <JSONP requests> are disabled by // default, see <Configuration Options> for more information. // user_agent - This value will be sent to the remote URL request as the // `User-Agent:` HTTP request header. If omitted, the browser user agent // will be passed through. // send_cookies - If send_cookies=1, all cookies will be forwarded through to // the remote URL request. // send_session - If send_session=1 and send_cookies=1, the SID cookie will be // forwarded through to the remote URL request. // full_headers - If a JSON request and full_headers=1, the JSON response will // contain detailed header information. // full_status - If a JSON request and full_status=1, the JSON response will // contain detailed cURL status information, otherwise it will just contain // the `http_code` property. // // Topic: POST Parameters // // All POST parameters are automatically passed through to the remote URL // request. // // Topic: JSON requests // // This request will return the contents of the specified url in JSON format. // // Request: // // > ba-simple-proxy.php?url=http://example.com/ // // Response: // // > { "contents": "<html>...</html>", "headers": {...}, "status": {...} } // // JSON object properties: // // contents - (String) The contents of the remote URL resource. // headers - (Object) A hash of HTTP headers returned by the remote URL // resource. // status - (Object) A hash of status codes returned by cURL. // // Topic: JSONP requests // // This request will return the contents of the specified url in JSONP format // (but only if $enable_jsonp is enabled in the PHP script). // // Request: // // > ba-simple-proxy.php?url=http://example.com/&callback=foo // // Response: // // > foo({ "contents": "<html>...</html>", "headers": {...}, "status": {...} }) // // JSON object properties: // // contents - (String) The contents of the remote URL resource. // headers - (Object) A hash of HTTP headers returned by the remote URL // resource. // status - (Object) A hash of status codes returned by cURL. // // Topic: Native requests // // This request will return the contents of the specified url in the format it // was received in, including the same content-type and other headers (but only // if $enable_native is enabled in the PHP script). // // Request: // // > ba-simple-proxy.php?url=http://example.com/&mode=native // // Response: // // > <html>...</html> // // Topic: Notes // // * Assumes magic_quotes_gpc = Off in php.ini // // Topic: Configuration Options // // These variables can be manually edited in the PHP file if necessary. // // $enable_jsonp - Only enable <JSONP requests> if you really need to. If you // install this script on the same server as the page you're calling it // from, plain JSON will work. Defaults to false. // $enable_native - You can enable <Native requests>, but you should only do // this if you also whitelist specific URLs using $valid_url_regex, to avoid // possible XSS vulnerabilities. Defaults to false. // $valid_url_regex - This regex is matched against the url parameter to // ensure that it is valid. This setting only needs to be used if either // $enable_jsonp or $enable_native are enabled. Defaults to '/.*/' which // validates all URLs. // // ############################################################################ // Change these configuration options if needed, see above descriptions for info. $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( $url ); if ( strtolower($_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_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 ); $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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