Right, that method works for authenticating directly to google APIs; but 
like I said, it doesn't seem to work with GAE's UserService

On Saturday, September 13, 2014 12:20:46 PM UTC-7, pankaj anand wrote:
>
> Have a look at here: 
>
>
> http://android-developers.blogspot.in/2012/09/google-play-services-and-oauth-identity.html
>
> On Saturday, 13 September 2014 01:00:03 UTC+5:30, Nick Badal wrote:
>>
>> I'm building a backend for an Android app using GAE (Java), and I'd like 
>> to authenticate users on the client and server with their Google accounts.
>>
>> Before OAuth2, you were able to use a Cookie retrieved from the _ah/login 
>> endpoint to authenticate users into your web app, but that method is 
>> deprecated and I'd like to be able to use the updated OAuth2 method.
>>
>> In my Android app I've been able to generate a JSON Web Token using the 
>> following line:
>>
>>> String jwt = GoogleAuthUtil.getToken(FamiliarActivity.this, 
>>> Plus.AccountApi.getAccountName(mGoogleApiClient), 
>>> "audience:server:client_id:1234567.apps.googleusercontent.com");
>>
>>
>> or an OAuth token:
>>
>>> String oauth2 = GoogleAuthUtil.getToken(FamiliarActivity.this, 
>>> Plus.AccountApi.getAccountName(mGoogleApiClient), 
>>> "oauth2:server:client_id:1234567.apps.googleusercontent.com:api_scope:
>>> https://www.googleapis.com/auth/plus.login";);
>>
>>
>> But, I haven't been able to figure out a way to use a token like this to 
>> trigger authentication in GAE like the Cookie used to. The documentation 
>> seems to indicate passing it as a header: "Authorization: Bearer <TOKEN>" 
>> but that doesn't seem to work.
>>
>> I'd like to be able to prompt my users with the permissions they're 
>> allowing, send that info (I'd assume via the OAuth2 token) to my server, 
>> and be able to obtain that user via the UserService.
>>
>> What is the correct way to retrieve and pass a token to my GAE endpoint 
>> so that it authenticates the user?
>>
>> Thanks! :)
>>
>

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