Google App Engine authentication using OAuth

Question

There are a lot of forums and samples out there, but all of them either outdated or just not understandable.

I understand that to authenticate requests to AppEngine I need to log in to a google account using AccountManager, get a token using GoogleAuthUtil.getToken, get an AuthCookie, and than do whatever I want on the AppEngine using my token.

Now, the last 2 parts are the ones I don't understand:

what is the AuthCookie? I need to get a new one every launch? is it a temporary "permission" to request authenticated requests from AppEngine? is the first token I received is a permanent one or I should get a new one every launch too?
My current request is "endpoint.list().execute()". Where is the authentication comes in here? I've seen a lot of weird HTTP request samples but none of them used the AppEngine endpoints.

I'm sorry if it's too basic stuff but I really just started using the AppEngine and I couldn't find any clear explanation on how it works from beginning to end.

Thank you.

The way you wrote your request suggests that you might be using the GAE endpoints service (which would have a bearing on how you do user authentication), is that the case? — Tom
– Tom, Commented Apr 6, 2013 at 1:26

Tom · Accepted Answer · 2013-04-06 15:09:32Z

2

Since you are using Endpoints, have you read this?

https://developers.google.com/appengine/docs/java/endpoints/consume_android#making-authenticated-calls

It is up-to-date and I think it is reasonably clear (and it includes a sample).

I believe it is the nature of OATH that you need to get a new token for every session.

answered Apr 6, 2013 at 15:09

Tom

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