实例：http://www.ikeepstudying.com/tools/proxy/
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index.php
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><script type="text/javascript" language="javascript">// I want to use json2.js because it allows me to format stringified JSON with// pretty indents, so let's nuke any existing browser-specific JSON parser.window.JSON = null;</script><script type="text/javascript" src="/js/jquery-1.8.2.min.js"></script><script type="text/javascript" src="http://benalman.com/code/projects/php-simple-proxy/shared/json2.js"></script><script> (function($){$(document).ready(function(e) { // Handle form submit. $('#params').submit(function(){ var proxy = 'proxy.php', url = proxy + '?' + $('#params').serialize(); // Update some stuff. $('#request').html( $('<a/>').attr( 'href', url ).text( url ) ); $('#response').html( 'Loading...' ); // Test to see if HTML mode. if ( /mode=native/.test( url ) ) { // Make GET request. $.get( url, function(data) { $('#response') .html( '<pre class="brush:xml"/>' ) .find( 'pre' ) .text( data ); }); } else { // Make JSON request. $.getJSON( url, function(data) { $('#response') .html( '<pre class="brush:js"/>' ) .find( 'pre' ) .text( JSON.stringify( data, null, 2 ) ); }); } // Prevent default form submit action. return false; }); // Submit the form on page load if ?url= is passed into the example page. if ( $('#url').val() !== '' ) $('#params').submit(); // Disable AJAX caching. $.ajaxSetup({ cache: false }); // Disable dependent checkboxes as necessary. $('input:radio').click(function(){ var that = $(this), c1 = 'dependent-' + that.attr('name'), c2 = c1 + '-' + that.val(); that.closest('form') .find( '.' + c1 + ' input' ) .attr( 'disabled', 'disabled' ) .end() .find( '.' + c2 + ' input' ) .removeAttr( 'disabled' ); }); // Clicking sample remote urls should populate the "Remote URL" box. $('#sample a').click(function(){ $('#url').val( $(this).attr( 'href' ) ); return false; }); });})($staff)</script> <form action="" method="get" id="params"> <div> <label> <b>Remote URL</b> <input type="text" value="" name="url" class="text" id="url" style="width:90%" /> </label> </div> <p id="sample"> ..or try these sample Remote URLs: <a href="http://github.com/">GitHub</a>, <a href="http://github.com/cowboy/php-simple-proxy/raw/master/examples/simple/json_sample.js">a sample JSON (not JSONP) request</a>, <a href="http://github.com/omg404errorpage">a 404 error page</a> </p> <div> <label> <input type="radio" disabled="disabled" value="native" name="mode"> Native <i>(disabled by default)</i> </label> </div> <div> <label> <input type="radio" disabled="disabled" checked="checked" value="json" name="mode"> JSON </label> </div> <div class="dependent-mode dependent-mode-json indent"> <div> <label> <input type="checkbox" checked="checked" value="1" name="full_headers"> Full Headers </label> </div> <div> <label> <input type="checkbox" checked="checked" value="1" name="full_status"> Full Status </label> </div> </div> <input type="submit" value="Submit" name="submit" class="submit"></form><h3>Request URL</h3><p id="request">N/A, click Submit!</p><h3>Simple PHP Proxy response</h3><div id="response">N/A, click Submit!</div>?
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://github.com/cowboy/php-simple-proxy/// Source - http://github.com/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; }?
实例：http://www.ikeepstudying.com/tools/proxy/
原文：http://benalman.com/projects/php-simple-proxy/
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