jQuery cross domain POST shenanigans

Question

I\'m trying to authenticate to an API, which only allows you to authenticate using a POST with JSON as form data, in the format of {\"username\":\"myusername\",\"password\":

Answer 1

The problem is that the domain you are trying to POST to doesn't respond to the OPTIONS request that is sent before each cross-domain request. With the OPTIONS request, the browser receives information about cross domain rules etc. To enable the cross domain request, the server has to set Access-Control-Allow-Origin:* (or the domain of the script, actually, but * covers everything) and maybe Access-Control-Allow-Methods: GET, POST, OPTIONS headers.