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POIs there a real proxy written in PHP or, what would I have to do to implement one?
 

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  1. POIs there a real proxy written in PHP or, what would I have to do to implement one?
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    <p>I have been looking around on the web for a PHP proxy script and I can't find any. All I keep finding are scripts that download pages and edit <code>src</code> and <code>href</code> attributes in the HTML and, require me to browse to whatever website they're installed on. I don't need this, I need a real proxy listening on a port that I can set my browser to route all it's requests to.</p> <p>What I'm looking to do is:</p> <ol> <li>run a PHP script that will listen on some port of my own computer</li> <li>configure my web browser to use localhost:port as a proxy</li> <li>have the PHP script serve the page to my browser</li> </ol> <p>All the so called proxy scripts written in PHP, that I have found, will fail miserably if the page requested uses <code>XMLHttpRequest</code> to fetch content because they won't see that request at all. No amount of link rewriting will solve the issue short of injecting some clever JavaScript that is unnecessary with a real proxy.</p> <p>What I want in the end, is to have access to the requests and responses going back and forth between my browser and some remote server. I want to be able to use my browser's support for JavaScript, cookies, flash, etc. Basically, I want to have programmatic access to all the communication so I can analyze or manipulate it using PHP.</p> <p>So, the questions are</p> <ul> <li>Have I missed the real proxy implemented in PHP because of all the noise in my search results?</li> <li>If there isn't a real proxy in PHP I would like to try making one. Are there resources online to help me learn what exactly I should do? (note, I RTM religiously: looking more for caveats and architecture of a basic proxy)</li> </ul> <p>Links are appreciated. I know there are several MITM proxies out there but I want one in PHP.</p> <p>I don't know if maybe I could do something with <a href="http://php.net/manual/en/features.commandline.webserver.php" rel="nofollow noreferrer">PHP's built-in webserver</a> but I'll mess with that as well.</p> <p><strong>UPDATE</strong></p> <p>I've got a router script for the PHP built in webserver that is beginning to show promise. I can fire up the webserver and tell my web browser to use it as a proxy. The router script I've made differentiates between local and external resources and gives an easy way of handling either case. The only problem I have is with https. The server reports <code>Invalid Request (Malformed HTTP Request)</code>. I think that means this server won't do https at all with just scripts and settings. I don't know. Maybe I'll be able to do it with Apache but transparently proxying https sounds hard, especially if I want to alter the data before it hits my browser.</p> <p><strong>AtropaToolbox/php_router/router.php</strong> The router script my PHP built in webserver is pointed at, pulls in the actual classes from other files.</p> <pre><code>&lt;?php require_once('AtropaToolbox/php_proxy/proxy.php'); $proxy = new atropa_proxy(); if($proxy-&gt;process_request() === false) { return false; } ?&gt; </code></pre> <p><strong>AtropaToolbox/php_proxy/proxy.php</strong> Extends atropa_mod_proxy to redefine the handlers.</p> <pre><code>&lt;?php require_once('AtropaToolbox/php_proxy/mod_proxy.php'); class atropa_proxy extends atropa_mod_proxy { protected function local_resource_handler() { return false; } protected function external_resource_handler() { $ext = $this-&gt;get_page(); //echo '&lt;pre&gt;' . print_r($ext, true) . '&lt;/pre&gt;'; //$ext['page'] = preg_replace('/&lt;a /', '&lt;p ', $ext['page']); $this-&gt;show_page($ext); } } ?&gt; </code></pre> <p><strong>AtropaToolbox/php_proxy/mod_proxy.php</strong> The generic router script</p> <pre><code>&lt;?php /** * Rev. 1 Atropa mod_proxy for php built in webserver */ class atropa_mod_proxy { protected function is_external_resource() { $host = parse_url($_SERVER['REQUEST_URI'], PHP_URL_HOST); if(isset($host) &amp;&amp; $host !== $_SERVER['SERVER_NAME']) { return true; } else { return false; } } protected function local_resource_handler() { return false; } protected function external_resource_handler() { $ext = $this-&gt;get_page(); $this-&gt;show_page($ext); } public function process_request() { if($this-&gt;is_external_resource()) { return $this-&gt;external_resource_handler(); } else { return $this-&gt;local_resource_handler(); } } public function get_request_headers() { $arr = array(); foreach($_SERVER as $svar =&gt; $sval) { if(substr($svar, 0, 4) === 'HTTP') { $svar = substr($svar, 5); $svar = preg_replace('/_/', ' ', $svar); $svar = ucwords(strtolower($svar)); $svar = preg_replace('/ /', '-', $svar); $arr[$svar] = $sval; } } return $arr; } public function pack_request_headers($headers_array) { $packed = ''; foreach($headers_array as $header_name =&gt; $header_value) { $packed .= $header_name . ': ' . $header_value . "\r\n"; } return $packed; } public function echo_response_headers($http_response_header_array) { foreach($http_response_header_array as $val) { if(strpos(strtolower($val), 'connection') !== 0) { header($val); } } } protected function get_page() { $request_headers = $this-&gt;get_request_headers(); $request_headers = $this-&gt;pack_request_headers($request_headers); $method = $_SERVER["REQUEST_METHOD"]; $scheme = parse_url($_SERVER['REQUEST_URI'], PHP_URL_SCHEME); $opts = array( $scheme =&gt; array( 'method' =&gt; $method, 'header' =&gt; $request_headers ) ); if(count($_POST) &gt; 0) { $content = http_build_query($_POST); $opts[$scheme]['content'] = $content; } $context = stream_context_create($opts); $ext = array(); $ext['page'] = file_get_contents($_SERVER['REQUEST_URI'], false, $context); $ext['http_response_header'] = $http_response_header; return $ext; } protected function show_page($ext) { header_remove(); $this-&gt;echo_response_headers($ext['http_response_header']); echo $ext['page']; } } ?&gt; </code></pre>
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