如何配置Struts 2.3接受GET和POST参数？

Question

We have migrated from 2.0 to 2.3. In Struts 2.0, we were able to send an AJAX request that contained both post and get parameters. But after migrating to Struts 2.3, were are not able to do such requests.

Here is what a sample AJAX request made using Prototype.js looks like :

var url = '/security/userdetails.action?mode=edit&userid=5';
var params = Form.serialize(form);
new Ajax.Request(url,
        {
            parameters: params,
            onSuccess: function(trans) {
                console.debug('success', trans);
            },
            onFailure: function(trans) {
                console.debug('failure', trans);
            },
            onException:function(trans) {
                console.debug('exception', trans);
            }
        });

As you can see, the above AJAX request contains both GET and POST requests. This worked fine with 2.0 but in 2.3, it seems the request is validated and the request is forwarded to result type "input", but for that we have no JSP configured, and in the end all we get is a 404 Not Found Error.

But if we change the code to the following, it works in Struts 2.3 as well

var url = '/security/userdetails.action?mode=edit';    // ------ The Changes are here
var params = Form.serialize(form);
params.userid = 5;  // ----- And here
new Ajax.Request(url,
        {
            parameters: params,
            onSuccess: function(trans) {
                console.debug('success', trans);
            },
            onFailure: function(trans) {
                console.debug('failure', trans);
            },
            onException:function(trans) {
                console.debug('exception', trans);
            }
        });

What is wrong with the first method ? Is there a configuration in Struts 2.3 to allow that request to be made ?

Answer 1

It depends on how HttpServlet works and which method Struts2 uses to retrieve parameters from the request, and method GET/POST (not both) used during that. Struts2 uses request.getParameterMap() to get parameters

Request parameters are extra information sent with the request. For HTTP servlets, parameters are contained in the query string or posted form data.

but you are using http post method and parameters should be post data.

Answer 2

The thing is this :

The userid was defined as an integer in the action class, so obviously the setter and getter for that was defined in terms of integer as well

But this userid, was present in both the url (as the query string) and in the post body - so basically an array of two strings. when the struts tries to parse the integer from the array, it gets the numberformatexception -> this results in invalid form submission and thus redirects to the "input" result type.

I did not see the struts log in that matter and got swayed away from the actual problem.

Thanks for your inputs though.