Cross Domain Access to ashx service using jQuery - asp.net

Question

I have an ASP.NET service that I'm access from a asxh file that returns a JSON string. The service works great except when accessed from our blog sub domain which is on a separate server. (blog.laptopmag.com)
Here is my jQuery
$.ajax({
type: "GET",
url: "http://www.laptopmag.com/scripts/service.ashx",
data: { "op": "get_products" },
dataType: "json",
success: function (data) {
alert(data);
}
});
and here is my ashx file
public class service : IHttpHandler {
public void ProcessRequest (HttpContext context) {
string jsonStr = "{}";
string op = context.Request["op"];
// Process request
context.Response.ContentType = "application/json";
context.Response.Write(jsonStr);
}
public bool IsReusable {
get {
return false;
}
}
}
I've tried switching to a jsonp request, but must be doing something wrong because I can't get anything to pull back. Here is what I've tried.
and here is my jsonp attempt that doesn't seem to work when called from blog.laptopmag.com
$.getJSON('http://www.laptopmag.com/scripts/service.ashx?callback=ProcessRequest&op=get_products', function(json) {
console.log(json);
});

Answer 1

OK, I figured out what the problem was with my JSONP request thanks to the following post:
Jquery success function not firing using JSONP
The problem was that the request wasn't getting a response back in the expected format.
Now, my ashx file now looks like this:
public void ProcessRequest (HttpContext context) {
string jsonStr = "{}";
string op = context.Request["op"];
string jsonp = context.Request["callback"];
// Do something here
if (!String.IsNullOrEmpty(jsonp))
{
jsonStr = jsonp + "(" + jsonStr + ")";
}
context.Response.ContentType = "application/json";
context.Response.Write(jsonStr);
}
and the jQuery ajax request looks like this:
$.getJSON('http://www.laptopmag.com/scripts/service.ashx?callback=?&op=get_products', function(json) {
console.log(json);
});

Answer 2

Security restrictions prevent you from making cross-domain jquery ajax calls, but there are workarounds. IMO the easiest way is to create a page on your site that acts as a proxy and hit the page with your jquery request. In page_load of your proxy:
WebClient client = new WebClient ();
Response.Write (client.DownloadString ("your-webservice-url"));
Other solutions can be found by a quick Google search.