Finally I achieved refreshing the access token as times as needed. The problem was a misconception of how it works the Google Api.
The first time to update the token, it is needed to call this endpoint with these parameters and setting as {{refreshToken}} the value obtained from the response of the Consent Screen call (serverAuthCode)
https://oauth2.googleapis.com/token?code={{refreshToken}}&client_id={{googleClientId}}&client_secret={{googleClientSecret}}&grant_type=authorization_code
After the first refresh, any update to the token needs to be call to this other endpoint by setting as {{tokenUpdated}} the attribute {{refresh_token}} obtained from the response of the first call.
https://oauth2.googleapis.com/token?refresh_token={{tokenUpdated}}&client_id={{googleClientId}}&client_secret={{googleClientSecret}}&grant_type=refresh_token
Here I show you an example of my AuthenticationService
import { Injectable} from '@angular/core';
import { Router } from '@angular/router';
import { GooglePlus } from '@ionic-native/google-plus/ngx';
@Injectable({
providedIn: 'root'
})
export class AuthenticationService {
static AUTH_INFO_GOOGLE = 'auth-info-google';
static CLIENT_ID = 'XXXXX-XXXX.apps.googleusercontent.com';
static CLIENT_SECRET = 'SecretPasswordClientId';
public authenticationState = new BehaviorSubject(false);
constructor(
private router: Router,
private googlePlus: GooglePlus) {
}
public isAuthenticated() {
return this.authenticationState.value;
}
public logout(): Promise<void> {
this.authenticationState.next(false);
return this.googlePlus.disconnect()
.then(msg => {
console.log('User logged out: ' + msg);
}, err => {
console.log('User already disconected');
});
}
/**
* Performs the login
*/
public async login(): Promise<any> {
return this.openGoogleConsentScreen().then(async (user) => {
console.log(' ServerAuth Code: ' + user.serverAuthCode);
user.updated = false;
await this.setData(AuthenticationService.AUTH_INFO_GOOGLE, JSON.stringify(user));
this.authenticationState.next(true);
// Do more staff after successfully login
}, err => {
this.authenticationState.next(false);
console.log('An error ocurred in the login process: ' + err);
console.log(err);
});
}
/**
* Gets the Authentication Token
*/
public async getAuthenticationToken(): Promise<string> {
return this.getAuthInfoGoogle()
.then(auth => {
if (this.isTokenExpired(auth)) {
return this.refreshToken(auth);
} else {
return 'Bearer ' + auth.accessToken;
}
});
}
private async openGoogleConsentScreen(): Promise<any> {
return this.googlePlus.login({
// optional, space-separated list of scopes, If not included or empty, defaults to `profile` and `email`.
'scopes': 'profile email openid',
'webClientId': AuthenticationService.CLIENT_ID,
'offline': true
});
}
private isTokenExpired(auth: any): Boolean {
const expiresIn = auth.expires - (Date.now() / 1000);
const extraSeconds = 60 * 59 + 1;
// const extraSeconds = 0;
const newExpiration = expiresIn - extraSeconds;
console.log('Token expires in ' + newExpiration + ' seconds. Added ' + extraSeconds + ' seconds for debugging purpouses');
return newExpiration < 0;
}
private async refreshToken(auth: any): Promise<any> {
console.log('The authentication token has expired. Calling for renewing');
if (auth.updated) {
auth = await this.requestGoogleRefreshToken(auth.serverAuthCode, auth.userId, auth.email);
} else {
auth = await this.requestGoogleAuthorizationCode(auth.serverAuthCode, auth.userId, auth.email);
}
await this.setData(AuthenticationService.AUTH_INFO_GOOGLE, JSON.stringify(auth));
return 'Bearer ' + auth.accessToken;
}
private getAuthInfoGoogle(): Promise<any> {
return this.getData(AuthenticationService.AUTH_INFO_GOOGLE)
.then(oauthInfo => {
return JSON.parse(oauthInfo);
}, err => {
this.clearStorage();
throw err;
});
}
private async requestGoogleAuthorizationCode(serverAuthCode: string, userId: string, email: string): Promise<any> {
let headers = new HttpHeaders();
headers = headers.set('Content-Type', 'application/x-www-form-urlencoded');
let params: HttpParams = new HttpParams();
params = params.set('code', serverAuthCode);
params = params.set('client_id', AuthenticationService.CLIENT_ID);
params = params.set('client_secret', AuthenticationService.CLIENT_SECRET);
params = params.set('grant_type', 'authorization_code');
const options = {
headers: headers,
params: params
};
const url = 'https://oauth2.googleapis.com/token';
const renewalTokenRequestPromise: Promise<any> = this.http.post(url, {}, options).toPromise()
.then((response: any) => {
const auth: any = {};
auth.accessToken = response.access_token;
console.log('RefreshToken: ' + response.refresh_token);
auth.serverAuthCode = response.refresh_token;
auth.expires = Date.now() / 1000 + response.expires_in;
auth.userId = userId;
auth.email = email;
auth.updated = true;
return auth;
}, (error) => {
console.error('Error renewing the authorization code: ' + JSON.stringify(error));
return {};
});
return await renewalTokenRequestPromise;
}
private async requestGoogleRefreshToken(serverAuthCode: string, userId: string, email: string): Promise<any> {
let headers = new HttpHeaders();
headers = headers.set('Content-Type', 'application/x-www-form-urlencoded');
let params: HttpParams = new HttpParams();
params = params.set('refresh_token', serverAuthCode);
params = params.set('client_id', AuthenticationService.CLIENT_ID);
params = params.set('client_secret', AuthenticationService.CLIENT_SECRET);
params = params.set('grant_type', 'refresh_token');
const options = {
headers: headers,
params: params
};
const url = 'https://oauth2.googleapis.com/token';
const renewalTokenRequestPromise: Promise<any> = this.http.post(url, {}, options).toPromise()
.then((response: any) => {
const auth: any = {};
auth.accessToken = response.access_token;
console.log('RefreshToken: ' + serverAuthCode);
auth.serverAuthCode = serverAuthCode;
auth.expires = Date.now() / 1000 + response.expires_in;
auth.userId = userId;
auth.email = email;
auth.updated = true;
return auth;
}, (error) => {
console.error('Error renewing refresh token: ' + JSON.stringify(error));
return {};
});
return await renewalTokenRequestPromise;
}
private setData(key: string, value: any): Promise<any> {
console.log('Store the value at key entry in the DDBB, Cookies, LocalStorage, etc')
}
private getData(key: string): Promise<string> {
console.log('Retrieve the value from the key entry from DDBB, Cookies, LocalStorage, etc')
}
private clearStorage(): Promise<string> {
console.log('Remove entries from DDBB, Cookies, LocalStorage, etc related to authentication')
}
}
%2Fpart raised my eyebrow but until reading your post I assumed I should blindly accept the code. Thanks for confirming. – Edee