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So I’m reading The Art & Science of Javascript, which is a good book, and it has a good section on JSONP. I’ve been reading all I can about it today, and even looking through every question here on StackOverflow. JSONP is a great idea, but it only seems to resolve the ‘Same Origin Problem’ for getting data, but doesn’t address it for changing data.
Did I just miss all the blogs that talked about this, or is JSONP not the solution I was hoping for?
JSONP results in a SCRIPT tag being generated to another server with any parameters that might be required as a GET request. e.g.
There is technically nothing to stop this sort of request altering data on the server, e.g. specifying newName=Tony. Your response could then be whether the update succeeded or not. You will be limited by whatever you can fit on a querystring. If you are going with this approach add some random element as a parameter so that proxy’s won’t cache it.
Some people may consider this goes against the way GET’s are supposed to work i.e. they shouldn’t cause data to change.