ExtJs4.1 - Form data not being submitted to server

[bomslang]

Folks,

I am using ExtJS 4.1. I am trying to submit a form using Ext.Ajax.request() and REST on server side.

Here's my Ajax request,

var params = form.getValues();
Ext.Ajax.request({
    url: 'feedback/newFeedback.action',
    params: params,
    success: function(response) {
        Ext.Msg.alert('Success');
    },
    failure: function(response) {
        Ext.Msg.alert('Failure', 'Error : '+response.responseText);
    },
    callback: function(options, success, response) {
        Ext.Msg.alert('Title', response.responseText);
    }
});

Server Side code :-

@RequestMapping(value="/feedback/newFeedback.action")
public @ResponseBody Map<String,? extends Object> create(@RequestBody Object data) throws Exception {
        try{
            List<Feedback> feedbacks = feedbackService.create(data);
            return getMap(feedbacks); // this will return json once control reaches here ..
        } catch (Exception e) {
            return getModelMapError("Error trying to create contact.");
        }
    }

When I click on Submit button, I get the below error

message: /feedback/newFeedback.action
description The requested resource (/feedback/newFeedback.action) is not available.

What am I missing ?

[bomslang]

Now, if I try out with form.submit(), it throws me a different exception

var form = Ext.getCmp('fdForm').getForm();
                        if(form.isValid()) {
                            form.submit({
                                waitMsgTitle: 'Title',
                                url: 'feedback/newFeedback.action',
                                method: 'POST',
                                success: function(response) {
                                     Ext.Msg.alert('Success');
                                },
                                failure: function(response) {
                                     Ext.Msg.alert('Failure');
                                }
                            });
                        }

Exception :-

POST http://localhost:8080/faq/feedback/newFeedback.action 415 (Unsupported Media Type) ext-all-debug.js:37622
Ext.define.request ext-all-debug.js:37622
Ext.define.doSubmit ext-all-debug.js:30042
Ext.define.run ext-all-debug.js:30016
(anonymous function)

What is happening ? What is wrong with my code ?

Any sample example of form submission using REST ?

[vietits]

It seems that your webserver does not support request to 'http://localhost:8080/faq/feedback/newFeedback.action'. What will happen if you will access to this url by using your browser?

[bomslang]

Thanks for your reply.

I tried running it under both - Eclipse Internal web browser as well as Chrome.
Both shows up the same error.