Browser response size limit

Question

I am calling my cross domain web-service through a getJson() call from jQuery. As my response object size is pretty big, i have used the maximum JSon size for my web-servic

Answer 1

One thing that looks kind of weird is the callback function:

 $.getJSON(url, function(arg) {       
     var evalstr = callback + "(" + JSON.stringify(arg) + ");";
     eval(evalstr);
 });

Since you are using JSONP (due to the request being cross-domain) the responding service should return a JavaScript like:

jQueryGeneratedUniqueCallbackName12345({my: 'data', foo: 'bar'});

So the arg argument is the actual JavaScript object. You should not need to stringify and then eval it. Simply use it as it is, i.e.:

 $.getJSON(url, function(data) {       
     console.log(data.foo);
 });

Quite a while ago I posted about the inner workings of JSONP on my blog if you are interested in more details.

Answer 2

Ive been through this once in a project, and what I recall was that IE has a limit of 2083 characters for both POST and GET requests. FF has a larger limit, but not limitless.

http://support.microsoft.com/kb/208427

Answer 3

Maybe you want your $.getJSON part look as follows:

$.getJSON(url, function(arg) {       
    callback.apply(null, JSON.stringify(arg));
});

// Or more simply

$.getJSON(url, function(arg) {       
    callback(JSON.stringify(arg));
});

Some more info about apply: MDN Docs

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UPDATE: Before that you could also change the getResponse function to:

function getResponse() {
    var localService = new getServiceProxy("SearchData.asmx");
    localService.invoke('Search', '', successcall);
}