Added XML Support

RestServer.php

@@ -33,12 +33,14 @@ class RestFormat
 	const HTML = 'text/html';
 	const AMF = 'applicaton/x-amf';
 	const JSON = 'application/json';
+	const XML = 'application/xml';
 	static public $formats = array(
 		'plain' => RestFormat::PLAIN,
 		'txt' => RestFormat::PLAIN,
 		'html' => RestFormat::HTML,
 		'amf' => RestFormat::AMF,
 		'json' => RestFormat::JSON,
+		'xml'  => RestFormat::XML,
 	);
 }
 
@@ -405,6 +407,20 @@ public function sendData($data)
 			$serializer = new Zend_Amf_Parse_Amf3_Serializer($stream);
 			$serializer->writeTypeMarker($data);
 			$data = $stream->getStream();
+
+		elseif ($this->format == RestFormat::XML) {
+
+		if (is_object($data) && method_exists($data, '__keepOut')) {
+				$data = clone $data;
+				foreach ($data->__keepOut() as $prop) {
+					unset($data->$prop);
+				}
+			}
+			$data = $this->xml_encode($data);
+			if ($data && $this->mode == 'debug') {
+				$data = $this->json_format($data);
+			}
+
 		} else {
 			if (is_object($data) && method_exists($data, '__keepOut')) {
 				$data = clone $data;
@@ -427,6 +443,44 @@ public function setStatus($code)
 		header("{$_SERVER['SERVER_PROTOCOL']} $code");
 	}
 
+	private function xml_encode($mixed, $domElement=null, $DOMDocument=null) {
+    if (is_null($DOMDocument)) {
+        $DOMDocument =new DOMDocument;
+        $DOMDocument->formatOutput = true;
+        $this->xml_encode($mixed, $DOMDocument, $DOMDocument);
+        echo $DOMDocument->saveXML();
+    }
+    else {
+        if (is_array($mixed)) {
+            foreach ($mixed as $index => $mixedElement) {
+                if (is_int($index)) {
+                    if ($index === 0) {
+                        $node = $domElement;
+                    }
+                    else {
+                        $node = $DOMDocument->createElement($domElement->tagName);
+                        $domElement->parentNode->appendChild($node);
+                    }
+                }
+                else {
+                    $plural = $DOMDocument->createElement($index);
+                    $domElement->appendChild($plural);
+                    $node = $plural;
+                    if (!(rtrim($index, 's') === $index)) {
+                        $singular = $DOMDocument->createElement(rtrim($index, 's'));
+                        $plural->appendChild($singular);
+                        $node = $singular;
+                    }
+                }
+
+                $this->xml_encode($mixedElement, $node, $DOMDocument);
+            }
+        }
+        else {
+            $domElement->appendChild($DOMDocument->createTextNode($mixed));
+        }
+    }
+}
 	// Pretty print some JSON
 	private function json_format($json)
 	{