HTTP status 406 - Please HELP!!! Spring+Ajax

Hi,

I'm using SpringMVC for my web application. In one of the JSPs I'm making an Ajax call using jQuery and retrieving a list of objects.

my jsp calls

Code:

<script type="text/javascript"> function getCities() { jq(function() { jq.post("getCities.html", { stateSelect: jq("#stateSelect").val()}, function(data){ jq("#cities").replaceWith('<span id="cities">Changed</span>'); }); }); } </script>

The getCities is mapped to the following:

Code:

@RequestMapping(value = "/getCities", method = RequestMethod.POST) public @ResponseBody List<StateNames> getCities(@RequestParam(value="stateSelect", required=true) String stateName, Model model) { // Delegate to service to do the actual adding List<StateNames> listStates = myService.listCityNames(stateName); // @ResponseBody will automatically convert the returned value into JSON format // You must have Jackson in your classpath return listStates; }

I get the following error when I run this.

Code:

406 Not Acceptable The requested resource is only capable of generating content not acceptable according to the Accept headers sent in the request.

Please guide me.
I used Firbug to see what's going on. Here's what i get:

Code:

Response Headers Server Apache-Coyote/1.1 Content-Type text/html;charset=utf-8 Content-Length 1070 Date Sat, 12 Feb 2011 13:09:44 GMT Request Headers Host localhost:8080 User-Agent Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 Accept */* Accept-Language en-us,en;q=0.5 Accept-Encoding gzip,deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive 115 Connection keep-alive Content-Type application/x-www-form-urlencoded; charset=UTF-8 X-Requested-With XMLHttpRequest Referer http://localhost:8080/MyApplication/ Content-Length 17 Cookie JSESSIONID=640868A479C40792F8AB3DE118AF12E0 Pragma no-cache Cache-Control no-cache

Please guide me.

I suppose you're using the wrong JQuery function since the accept header

Code:

Accept: application/json, text/javascript, */*

is missing, use postJSON() instead.

Robin.

Quote:

Originally Posted by robin

I suppose you're using the wrong JQuery function since the accept header

Code:

Accept: application/json, text/javascript, */*

is missing, use postJSON() instead.

Robin.

I've also tried with postJSON, but I guess that's not the problem. I keep getting the same error.

I racked my brains for the whole day & came to realize that if i send String, Integer as replies from my controller back to the jsp, the whole thing works well.
But the time I start sending objects/List of Objects, the code breaks with HTTP 406?
Why is it so?
Please help.

I also tried the getJSON function and got the same HTTP 406 error:

Code:

Response Headers Server Apache-Coyote/1.1 Content-Type text/html;charset=utf-8 Content-Length 1070 Date Sun, 13 Feb 2011 14:38:16 GMT Request Headers Host localhost:8080 User-Agent Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 Accept application/json, text/javascript, */*; q=0.01 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip,deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive 115 Connection keep-alive x-requested-with XMLHttpRequest Referer http://localhost:8080/Auditions/ Cookie JSESSIONID=62D82E42596B6C8E31EEC76AF28EA81E

In order to isolate the problem I would start with allowing a GET request for that method and return a single StateNames instance. Then test the returned value by calling the URL using:

Code:

curl -X GET -H "Content-Type: application/json" http://localhost.../getCities

Do you see json content or not?
Then I would change the return value back to a list. I'm not sure whether this is supported out of the box, I'm am using a list of values but only wrapped in a return object, not in the return value itself. I can't remember if the reason was that it isn't supported or if this is just an coincendence.