Question

Ajax response I am getting is always empty!
Interestingly, if I copy paste that URL in browser, I do get a proper html snippet (test ad) back. I guess this is related to some cross-site call stuff. Need some help/pointers as response is not json. Its html code.

Please look at the code – http://pastie.org/1120352

Answer 1

It looks you are fetching data from some different host.

You need to have a look at Same Origin Policy:

In computing, the same origin policy
is an important security concept for a
number of browser-side programming
languages, such as JavaScript. The
policy permits scripts running on
pages originating from the same site
to access each other’s methods and
properties with no specific
restrictions, but prevents access to
most methods and properties across
pages on different sites.

For you to be able to get data, it has to be:

Same protocol and host

You need to implement JSONP to workaround it.