diff -r bd595ad770fc -r 1c2f13fd785c web/enmi/Zend/Json/Server/Response/Http.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/enmi/Zend/Json/Server/Response/Http.php	Thu Jan 20 19:30:54 2011 +0100
@@ -0,0 +1,81 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Json
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Http.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+/**
+ * @see Zend_Json_Server_Response
+ */
+require_once 'Zend/Json/Server/Response.php';
+
+/**
+ * @category   Zend
+ * @package    Zend_Json
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Json_Server_Response_Http extends Zend_Json_Server_Response
+{
+    /**
+     * Emit JSON
+     *
+     * Send appropriate HTTP headers. If no Id, then return an empty string.
+     *
+     * @return string
+     */
+    public function toJson()
+    {
+        $this->sendHeaders();
+        if (!$this->isError() && null === $this->getId()) {
+            return '';
+        }
+
+        return parent::toJson();
+    }
+
+    /**
+     * Send headers
+     *
+     * If headers are already sent, do nothing. If null ID, send HTTP 204
+     * header. Otherwise, send content type header based on content type of
+     * service map.
+     *
+     * @return void
+     */
+    public function sendHeaders()
+    {
+        if (headers_sent()) {
+            return;
+        }
+
+        if (!$this->isError() && (null === $this->getId())) {
+            header('HTTP/1.1 204 No Content');
+            return;
+        }
+
+        if (null === ($smd = $this->getServiceMap())) {
+            return;
+        }
+
+        $contentType = $smd->getContentType();
+        if (!empty($contentType)) {
+            header('Content-Type: ' . $contentType);
+        }
+    }
+}