使用AJAX解析JSONP数据

Question

Tomorrow I have an exam on Web Design and I can't seem to understand how to read JSONP responses with AJAX. I can do fine with JSON, as well as with JSONP as long as there is no callback function, but when the callback function has a name nothing seems to work.

I will give two examples of this:

FIRST EXAMPLE

Reading data from this link: https://openlibrary.org/api/books?bibkeys=ISBN%3A0451526538&callback=mycallback

My function:

$.ajax({
        url: "https://openlibrary.org/api/books?bibkeys=ISBN:0451526538&callback=mycallback",
        dataType: "jsonp",
        success: function(data){
            var isbn = data["ISBN:0451526538"].bib_key;
                alert(isbn);

        }
    });

SECOND EXAMPLE

And this one I can't seem to understand WHY it does/doesn't work.

My way (which doesn't work):

$.ajax({
        url: "http://www.flickr.com/services/feeds/photos_public.gne?tags=flowers&format=json#",
        dataType: "jsonp",
        success: function(data){
            alert(data.title);
    }
    });

Correct code:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.2.3/jquery.min.js"></script>
$.ajax({
            url: "http://www.flickr.com/services/feeds/photos_public.gne?tags=flowers&format=json#",
            dataType: "jsonp",
            jsonp: "jsoncallback",
            success: function(data){
                alert(data.title);
        }
        });

Can anyone PLEASE take the time to explain how I can get past the wrapper (padding) that is the callback function to access the data. Please no $.getJSONP, this is the only way I have to get this to work that will be accepted in my exam.

</div>

Answer 1

The jsonp parameter is jsoncallback

http://www.flickr.com/services/feeds/photos_public.gne?tags=flowers&format=json&jsoncallback=?