How can get userToken parameter for auth GDK from callback url

Question

I cannot get "userToken" parameter from the redirected callback url.

Under Glassware GDK authorization guideline like below I should have seen “userToken” parameter on redirected callback url after turned on our glassware.

GDK Authentication Process

When users turn on your Glassware in MyGlass, they are redirected to your authentication URL. These requests include a query parameter named userToken that you need to use later.

However, when i debug the redirected callback url on callback server, there had just "code" parameter.

It looks like the successful authorization flow of Mirror API under Glassware Mirror API authrization guideline like below. (Not Glassware GDK authorization flow)

Authenticate the user

This initial sign-in returns an authorization result object that contains an authorization code if successful.

I insert the informations like below on glassware submission web page.

Client ID = Client ID for Service Account

Authorization URL = https://accounts.google.com/o/oauth2/auth?response_type=code&scope=https://www.googleapis.com/auth/userinfo.profile+https://www.googleapis.com/auth/userinfo.email+https://www.googleapis.com/auth/drive.file+https://www.googleapis.com/auth/glass.timeline+https://www.googleapis.com/auth/glass.location&redirect_uri=http://www.aaa.com/auth/google/callback&access_type=offline&approval_prompt=force&client_id=Client ID for web application

Package Name = Package Name from AndroidManifest.xml.

What i have to fix for getting "userToken" parameter on redirected callback url ??

Answer 1

The ?userToken= query parameter is not retrieved from the OAuth 2.0 redirect callback but from the URL that MyGlass uses to open the pop-up.

If the URL you gave the review team was something like https://www.example.com/auth, MyGlass will open a pop-up with this URL https://www.example.com/auth?userToken=<USER_TOKEN>. It is you responsibility to save this value until you can fully process the request.