Add support for DELETE and PUT requests

Author: softius

README.md

@@ -1,26 +1,26 @@
 PHP Cross Domain (AJAX) Proxy
 ==============
 
-An application proxy that can be used to transparently transfer any request ( including of course XMLHTTPRequest ) to any third part domain. It is possible to define a list of acceptable third party domains and you are encouraged to do so. Otherwise the proxy is open to any kind of requests.
+An application proxy that can be used to transparently transfer all kind of requests ( including of course XMLHTTPRequest ) to any third part domain. It is possible to define a list of acceptable third party domains and you are encouraged to do so. Otherwise the proxy is open to any kind of requests.
 
 Installation
 --------------
 
 The proxy is indentionally limited to a single file. All you have to do is to place `proxy.php` under your application
 
-Whenever you want to make a cross domain request, just make a request to http://www.yourdomain.com/ajax-proxy.php and specify the cross domain URL by using `csurl` parameter. Obviously, you can add more parameters according to your needs; note that the rest of the parameters will be used in the cross domain request. For instance, if you are using jQuery:
+Whenever you want to make a cross domain request, just make a request to http://www.yourdomain.com/proxy.php and specify the cross domain URL by using `csurl` parameter. Obviously, you can add more parameters according to your needs; note that the rest of the parameters will be used in the cross domain request. For instance, if you are using jQuery:
 
 ``` JAVASCRIPT
 $('#target').load(
-	'http://www.yourdomain.com/ajax-proxy.php', {
+	'http://www.yourdomain.com/proxy.php', {
 		csurl: 'http://www.cross-domain.com/',
 		param1: value1, 
 		param2: value2
 	}
 );
 ```
 
-It’s worth mentioning that both POST and GET methods work and headers are taken into consideration. That is to say, headers sent from browser to proxy are used in the cross domain request and vice versa.
+It’s worth mentioning that all request methods are working GET, PUT, POST, DELETE are working and headers are taken into consideration. That is to say, headers sent from browser to proxy are used in the cross domain request and vice versa.
 
 You can also specify the URL with the `X-Proxy-URL` header, which might be easier to set with your JavaScript library. For example, if you wanted to automatically use the proxy for external URL targets, for GET and POST requests:
 

proxy.php

@@ -1,7 +1,7 @@
 <?php
 
 /**
- * AJAX Cross Domain (PHP) Proxy 0.7
+ * AJAX Cross Domain (PHP) Proxy 0.8
  *    by Iacovos Constantinou (http://www.iacons.net)
  * 
  * Released under CC-GNU GPL
@@ -48,11 +48,22 @@
 
 // identify request method, url and params
 $request_method = $_SERVER['REQUEST_METHOD'];
-$request_params = ( $request_method == 'GET' ) ? $_GET : $_POST;
+if ( 'GET' == $request_method ) {
+	$request_params = $_GET;
+} elseif ( 'POST' == $request_method ) {
+	$request_params = $_POST;
+} elseif ( 'PUT' == $request_method || 'DELETE' == $request_method ) {
+	$request_params = file_get_contents( 'php://input' );
+} else {
+	$request_params = null;
+}
 // Get URL from `csurl` in GET or POST data, before falling back to X-Proxy-URL header.
-$request_url = urldecode( isset( $_REQUEST['csurl'] ) ? $_REQUEST['csurl'] : $_SERVER['HTTP_X_PROXY_URL'] );
+$request_url = isset( $_REQUEST['csurl'] ) ? urldecode( $_REQUEST['csurl'] ) : urldecode( $_SERVER['HTTP_X_PROXY_URL'] );
 $p_request_url = parse_url( $request_url );
-unset( $request_params['csurl'] );
+
+// csurl may exist in GET request methods
+if ( is_array( $request_params ) && array_key_exists('csurl', $request_params ) )
+	unset( $request_params['csurl'] );
 
 // ignore requests for proxy :)
 if ( preg_match( '!' . $_SERVER['SCRIPT_NAME'] . '!', $request_url ) || empty( $request_url ) || count( $p_request_url ) == 1 ) {
@@ -91,10 +102,13 @@
 curl_setopt( $ch, CURLOPT_HTTPHEADER, $request_headers );   // (re-)send headers
 curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );	 // return response
 curl_setopt( $ch, CURLOPT_HEADER, true );	   // enabled response headers
-// add post data for POST requests
-if ( $request_method == 'POST' ) {
+// add data for POST, PUT or DELETE requests
+if ( 'POST' == $request_method ) {
 	curl_setopt( $ch, CURLOPT_POST, true );
 	curl_setopt( $ch, CURLOPT_POSTFIELDS, http_build_query( $request_params ) );
+} elseif ( 'PUT' == $request_method || 'DELETE' == $request_method ) {
+	curl_setopt( $ch, CURLOPT_CUSTOMREQUEST, $request_method );
+	curl_setopt( $ch, CURLOPT_POSTFIELDS, $request_params );
 }
 
 // retrieve response (headers and content)
@@ -118,7 +132,7 @@
 }
 
 // finally, output the content
-print($response_content );
+print( $response_content );
 
 function csajax_debug_message( $message )
 {