Re^2: Perl json parser and JSONP issue

[heatblazer]

I know that, so that`s why I posted my javascript code. You can clearly see that I am passing a JSON file to a callback function, as I followed 2 examples. I just get nothing. When I press the button ( who executes the JSONP creation ) it`s ok, in firebug I do see the json object clearly, it is in the DOM but nothing more.. Most examples say that this must work fine.

[tobyink]

"You can clearly see that I am passing a JSON file to a callback function"

Yes - that's entirely the problem. Your function expects to be get JSONP, and it's being given JSON. As I said: JSON and JSONP are different file formats.

You script is trying to get some JSONP from http://localhost/dat.json?callback=dbg but it's being given JSON. JSON and JSONP are different file formats.

Here's an example JSON file:

{ "name": "Joe Bloggs" }

Here's an example JSONP file:

process({ "name": "Joe Bloggs" });

As you can see, they look a little bit different. That's because JSON and JSONP are different file formats.

Also, make sure you're sending the correct HTTP headers.

• For JSON, you want Content-Type: application/json.
• For JSONP, you want Content-Type: application/ecmascript or Content-Type: application/javascript or Content-Type: text/javascript.

Note the difference: that's because JSON and JSONP are different file formats.

[heatblazer]

Well you are right... it`s kind of confusing... So if I am right, every time I create and record a JSON, I have to convert it to JSONP with wrapping it with the function before calling it back...

[tobyink]

Typically you'd configure your web server (or some other piece of middleware) to convert your JSON to JSONP on the fly. I'm surprised there isn't an Apache mod_jsonp that I can point you towards.