sendAJAX data parameter in CasperJs - ajax

Question

again, I got another problem with casperjs, now with sendAJAX function.
It says that sendAJAX has 5 parameters which are these followings :
url: The url to request.
method: The HTTP method (default: GET).
data: Request parameters (default: null).
async: Flag for an asynchroneous request? (default: false)
settings: Other settings when perform the AJAX request (default:
null)
So, it says the data method is object so, it should be filled with :
var data = new Object();
data.amount= 15;
and also with this one,
var data = {amount:15};
but there were no successful value send to my web service (always send 0 as value, but ajax request successful, even returning the json data) which has an url like this
"http://localhost:9000/TempCountryAmountREST/setCountryAmount"
It will be succeed if I direct bind my data variable to my url like this :
"http://localhost:9000/TempCountryAmountREST/setCountryAmount?amount="+amount
[UPDATE]
The TempCountryAmountREST is my controller name and setCountryAmount is my function inside my controller.
[UPDATE]
I forgot to include my usage of sendAJAX(), here is the code that I use :
return JSON.parse(__utils__.sendAJAX(wsurl, "POST" , data, false, { contentType: "application/json" }));
So how does I fill the data in the sendAJAX parameter?
Thanks in advance...

Answer 1

Sorry, I've found what the answer is.
I make some mistakes in contentType which I was set with contentType: "application/json" instead of contentType: "application/x-www-form-urlencoded" }
If we are looking about how ajax send the content from method send(), they were use x-www-form-urlencoded. See this for more detail
When we see through casperjs clientutils.js script, we should found how sendAJAX work.
On the `this.sendAJAX = function sendAJAX(url, method, data, async, settings) {
}
there are url construction logic which transformed our Object (if so) to x-www-form-urlencoded form. So that we need to set our contentType as application/x-www-form-urlencoded
Very well, thanks for your attention...