I think I understand how OAuth 2.0 works in the context of a mobile app or website - neither is my case.
I have a C++ command line application that I want to give access to one of the Google Services (Google Fusion Tables) but I think this question applies to any of the Google Services, or heck, perhaps also any command line app that has to deal with OAuth2.
I have the username. I have the password (the user typed it). I need to get a token so I can make the calls through Curl. What is the easiest way to accomplish this?
Update 1:
After going through the documentation, it seems that the least painful OAuth2 flow will be the "Installed Application" one.
What I am thinking is that my command line tool will make requests for public tables without needing a token (but it seems we still need to be sending an AppID from Google which I can get from the Google APIs dashboard).
Whenever my command line tool will need to use a private resource, that user would be required to supply a Google supplied authorization code (which my command line tool can then use to get a usable token). If the user has not supplied the authorization code in the command line, my tool would just print a link that the user can paste to the URL to generate the authorization code. The link would look like this: