SyntaxError：missing; 在声明jquery jsonp之前

Question

I am using below code to access rest service hosted on another domain.

$.ajax({
            type: 'GET',
            url: url,
            async: false,
            jsonpCallback: 'jsonCallback',
            contentType: "application/json",
            dataType:"jsonp",
            success: function(json) {
                alert(json);
            },
            error: function(e) {
               console.log(e.message);
            }
        });

I am able to get the data correctly, but I get this error in firebug in mozilla:

SyntaxError: missing ; before statement

{"Hello":"World"}

Can anyone suggest me what I am doing wrong here? Even though Json data is valid. I tried all the suggestions posted in this question But still I am getting same error.

Answer 1

If it's really JSON you ask for, don't set "jsonp" as dataType , and don't provide a callback :

$.ajax({
        type: 'GET',
        url: url,
        contentType: "application/json",
        success: function(json) {
            alert(json);
        },
        error: function(e) {
           console.log(e.message);
        }
});

Answer 2

the format of JSON and JSONP are slightæy different JKSONP is a function invocation expression

callback({"hellow":"world"});

whereas JSON is simply a serialized object

{"Hello":"world"}

fromyour posting it would seem that the server is returning JSON and not JSONP

So you either need to change the server to reply correctly (The actual callback name is a get parameter to the request). You should do this if you are using the ajax call across domains

If you are not using ajax across domains stick to regular JSON