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Spring 2.5.x MVC portlet with annotation & AJAX with jQuery+JSON Error: Content Type cant be set to json...

Answer 1

A:

It seems to me you should use following

use dataType:'json'
use contentType: "application/json; charset=utf-8"
use JSON.stringify to convert your data (every property separately) which you gives per data parameters.

you can see under http://stackoverflow.com/questions/2737525/how-do-i-build-a-json-object-to-send-to-an-ajax-webservice/2738086#2738086 an example how to make JSON-encoding. Another link http://stackoverflow.com/questions/2670147/can-i-return-json-from-an-asmx-web-service-if-the-contenttype-is-not-json/2671583#2671583 can be probably also helpful.

Oleg 2010-07-02 12:02:43

hey, i have already notified that the content i m getting is not coming as JSON. the params are getting sent sucessfully and my calculations are generating final result. The only problem is i am getting the whole html in callback..so.. pls help regarding that...

Paarth 2010-07-02 12:15:54

hi, Now i changed my view class, and made new one whcih directly implementing View interface. Now i am giving new AjaxView() everytime for my ajax method. Sot the error is gone but still my content is not coming in JSON :(

Paarth 2010-07-02 12:29:27

You should set `dataType` to `'json'` or to `'html'`. It is better to set both `dataType` and `contentType` in the `jQuery.ajax`. At least in two places in your code you set ContentType to `application/json` (see `AjaxView` which you posted) and you write that you need have no JSON???

Oleg 2010-07-02 12:31:38

i need JSON, but server not sending JSON... Its sending HTML.. thats what my problem is... will try your note also... thx

Paarth 2010-07-02 12:41:01

the main problem is, even i created my own `AjaxView` class, returning the new view every time i call ajax method, setting content type to json, making new `JSONObject` with my return data into it and setting json string into `response.getWriter().print()` from the `AjaxView` class... Still i am getting HTML :(. Is this a problem of/regarding Portlet's VIEW mode?

Paarth 2010-07-02 12:48:32

I don't know Spring, but in general it is enough to set contentType in the response and write the data as a stream. Like in the example from the link (see http://www.jtraining.com/blogs/ajax-with-spring-mvc-and-jquery.html) which you posted: `response.getOutputStream().write( jsonString.getBytes() );`. Moreover in the example from the link one use jQuery 1.3.2. In jQuery 1.4.x you should be more careful with setting of dataType and contentType. If you don't do this jQuery try to guess and you can receive not what you want.

Oleg 2010-07-02 12:53:03

i have used jquery 1.3.2...and trying to look into it why its fetching my default page HTML in that JSON request :(

Paarth 2010-07-02 13:11:36

Answer 2

+1 A:

Hi,

I have not found the solution with spring 2.5. So upgraded to 3.0.3 and tried to use ContentNEgotiatingViewResolver with JSON. But it was failing.

check the link for detailed explanation on spring 3.0.3 of my problem. http://stackoverflow.com/questions/3183805/error-contentnegotiatingviewresolverof-spring-3-0-3-mvc-portletjson

finally, i found that spring 3 is not supporting portlet JSON. So i moved to servlet and not using spring MVC for json. Only for JSPs...i m using it.

Paarth 2010-07-06 10:31:52

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Spring 2.5.x MVC portlet with annotation & AJAX with jQuery+JSON Error: Content Type cant be set to json...

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