lib 1013814 // google http client

lib 1013815 // google api client

lib 1013816 // google oauth client

lib 1013817 // jackson

lib 1013818 // google jackson2

lib 1013819 // google http client appengine

//lib 1013820 // appengine api sdk

import com.google.api.client.googleapis.auth.oauth2.GoogleIdToken;

import com.google.api.client.googleapis.auth.oauth2.GoogleIdToken.Payload;

import com.google.api.client.googleapis.auth.oauth2.GoogleIdTokenVerifier;

import com.google.api.client.json.jackson2.JacksonFactory;

//import com.google.api.client.extensions.appengine.http.UrlFetchTransport;

import com.google.api.client.http.javanet.NetHttpTransport;

static bool googleVerifyUserToken(S clientID, S token) ctex {

  //UrlFetchTransport.getDefaultInstance();

  new NetHttpTransport transport;

  GoogleIdTokenVerifier verifier = new GoogleIdTokenVerifier.Builder(transport, new JacksonFactory)

    // Specify the CLIENT_ID of the app that accesses the backend:

    .setAudience(Collections.singletonList(clientID))

    .build();

  GoogleIdToken idToken = verifier.verify(token);

  if (idToken != null) {

    Payload payload = idToken.getPayload();

    // Print user identifier

    String userId = payload.getSubject();

    print("User ID: " + userId);

    // Get profile information from payload

    String email = payload.getEmail();

    boolean emailVerified = Boolean.valueOf(payload.getEmailVerified());

    String name = (String) payload.get("name");

    String pictureUrl = (String) payload.get("picture");

    String locale = (String) payload.get("locale");

    String familyName = (String) payload.get("family_name");

    String givenName = (String) payload.get("given_name");

    print("Name: " + name);

    true;

  } else {

    print("Invalid ID token.");

    false;

  }

}