I'm trying to POST JSON formatted data from Javascript (using Prototype) to Grails. My Javascript code is:
var JSONObject = new Object;
JSONObject.id = "23";
JSONObject.name = "Test 1";
JSONstring = JSON.stringify(JSONObject);
var url = "${createLink(controller:'testController', action:'receiveJson')}";
new Ajax.Request(url, {
method:'post',
contentType:'application/json',
parameters:JSONstring,
asynchronous:true,
onSuccess: function (req) {
sendInfoResponse(req.responseText);
}
});
and the code in my Grails controller is:
def receiveJson = {
def json = request.JSON;
}
However, the 'json' variable appears to be empty in my tests. I'd be so grateful if someone could explain开发者_Go百科 what I'm doing wrong. Many thanks.
In your Ajax.Request options change
parameters:JSONstring,
to
postBody:JSONstring,
The problem with using parameters is that it URL encodes the data so that the request body ends up looking like this:
%7B%22id%22%3A%2223%22%2C%22name%22%3A%22Test%201%22%7D&_=
Instead of the desired (which is what you get with postBody):
{"id":"23","name":"Test 1"}
Good question mfloryan - I was doing the testing manually, i.e. not as part of a unit or integration test.
Thanks very much for the help hvgotcodes. I made the changes to my code as you have suggested, but unfortunately to no avail. Interestingly, if I print request.JSON I get {}
, whereas if I print request.json I get null
.
EDIT: By 'printing' I mean using: request.JSON.toString()
EDIT: Thank you all so much for the help. Once I'd made the final change John Wagenleitne suggested the code began working properly. I'm very grateful indeed for all your help.
I don't think you are invoking the Ajax.Request correctly. From the documentation, the parameters option:
"The parameters for the request, which will be encoded into the URL for a 'get' method, or into the request body for the other methods. This can be provided either as a URL-encoded string or as any Hash-compatible object (basically anything), with properties representing parameters."
I think you need to do something like
...
parameters: {json: JSONString}
...
and then in your controller
request.json
note the form of the parameters object literal - it tells the Prototype library to make the request key 'json' and the request value be the json string. You access the key off the request object in the controller.
EDIT -- I just realized you're javascript block is jacked up.
This:
var JSONObject = new Object;
should be something like
var JSONObject = new Object();
...
you might also be able to do just an object literal, so
var jsonObject = {};
....
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