Jetty servlet respons to Ajax always empty
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by chris
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Published on 2010-05-12T09:27:27Z
Indexed on
2010/05/12
22:54 UTC
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Hi I try to run a java server on Jetty which should respond to an ajax call. Unfortunately the response seems to be empty when I call it with ajax. When I call http://localhost:8081/?id=something I get an answer.
The Java Server:
public class Answer extends AbstractHandler
{
public void handle(String target,
Request baseRequest,
HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException
{
String id = request.getParameter("id");
response.setContentType("text/xml");
response.setHeader("Cache-Control", "no-cache");
response.setContentLength(19+id.length());
response.setStatus(HttpServletResponse.SC_OK);
response.getWriter().write("<message>"+id+"</message>");
//response.setContentType("text/html;charset=utf-8");
response.flushBuffer();
baseRequest.setHandled(true);
}
public static void main(String[] args) throws Exception
{
Server server = new Server(8081);
server.setHandler(new Answer());
server.start();
server.join();
}
}
The js and html:
<html>
<head>
<script>
var req;
function validate() {
var idField = document.getElementById("userid");
var url = "validate?id=" + encodeURIComponent(idField.value);
if (typeof XMLHttpRequest != "undefined") {
req = new XMLHttpRequest();
} else if (window.ActiveXObject) {
req = new ActiveXObject("Microsoft.XMLHTTP");
}
req.open("GET", "http://localhost:8081?id=fd", true);
req.onreadystatechange = callback;
req.send(null);
}
function callback() {
if (req.readyState == 4) {
if (req.status == 200) {
var message = req.responseXML.getElementsByTagName("message")[0];
document.getElementById("userid").innerHTML = "message.childNodes[0].nodeValue";
}
}
}
</script>
</head>
<body onload="validate('foobar')">
<div id="userid">hannak</div>
</body>
</html>
I'm actually don't know what I'm doing wrong here. Maybe someone has a good idea.
greetings chris
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