Google Authentication on Android and Passport / Loopback.io

[Damien Galan]

Hi,

I'm trying to authenticate an user from Android with the Account Manager, i'm able to retrieve a token but when i send this token to loopback (  /auth/google/callback?code=MYTOKEN  ) 

i have the error "Invalid Grant, Incorrect token type"

there is some info here : https://stackoverflow.com/questions/11631928/authenticating-with-oauth2-for-an-app-and-a-website

I'm using this sample on android https://gist.github.com/TomTasche/5665497 

Any clues ?

Thanks

[Raymond Feng]

There are two things in oAuth 2:

- access token

- authorization code

The /auth/google/callback should receive an authorization code so that it can request an access token from Google.

Can you check what you got from Android?

Thanks,

---

Raymond Feng

Co-Founder and Architect @ StrongLoop, Inc.

StrongLoop makes it easy to develop APIs in Node, plus get DevOps capabilities like monitoring, debugging and clustering.

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[Koustuv Sinha]

Hi,

I have the same question. I am developing an Android application with Loopback backend api. Now loopback api exposes "/auth/google/callback?" api, and using Android Account Manager we can get the access token. But when I try to send that token to the api, i get a 500 server error : "InternalOAuthError: failed to obtain access token". Now I am new into this so please bear with me. I am following the architecture from the SO post by Damien. Ideally, when my android app gets the access token, it should send it back to Loopback API and in turn log in to the server? You said an authorization code is needed, is it another parameter of the API call?

Thanks & Regards,

Koustuv Sinha