Unexpected token colon JSON after jQuery.ajax#get

To support JSONP requests, the server will have to include the P, or “Padding,” in the response.

jQuery111108398571682628244_1403193212453({"Name":"Tom","Description":"Hello it's me!"})

The syntax error, "Unexpected token :", is because JSONP is parsed as JavaScript, where {...} also represents blocks. It just takes advantage of JSON and JavaScript’s similar syntax to define the data being passed to a global function call.

By default, jQuery will include a callback query-string parameter with the name of the function:

var callback = req.query.callback;
var data = JSON.stringify({
    Name : "Tom",
    Description : "Hello it's me!"
});

if (callback) {
    res.setHeader('Content-Type', 'text/javascript');
    res.end(callback + '(' + data + ')');
} else {
    res.setHeader('Content-Type', 'application/json');
    res.end(data);
}

ExpressJS also includes res.jsonp() that already implements this condition:

app.get( "https://stackoverflow.com/", function( req, res ) {
    console.log( 'req received' );

    res.jsonp({
        Name : "Tom",
        Description : "Hello it's me!"
    });
});