實例：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:php;toolbar:false;'>' )			  		.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>

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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;  }

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實例：http://www.ikeepstudying.com/tools/proxy/

原文：http://benalman.com/projects/php-simple-proxy/

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