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I had no idea that was an option so I researched it a bit and found this stackoverflow question: http://stackoverflow.com/questions/978061/http-get-with-requ...

Note this part of the accepted answer:

> So, yes, you can send a body with GET, and no, it is never useful to do so.

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Specifically the intent was to say that it would be a violation of the HTTP/1.1 spec to change the response based on the contents of the message body, however if /delta used a hash of the message body contents in the URL then it should still be semantically correct.

ooh, that's clever. but yeah, would be a pain for developers trying to actually work with the API, to have to create a hash just to make HTTP happy.

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