If your Firebase client app communicates with a custom backend server, you might need to identify the currently signed-in user on that server. Then, on the server, verify the integrity and authenticity of the ID token and retrieve the uid from it.
You can use the uid transmitted in this way to securely identify the currently signed-in user on your server. When a user or device successfully signs in, Firebase creates a corresponding ID token that uniquely identifies them and grants them access to several resources, such as Firebase Realtime Database and Cloud Storage.
You can re-use that ID token to identify the user or device on your custom backend server. To retrieve the ID token from the client, make sure the user is signed in and then get the ID token from the signed-in user:. If the provided ID token has the correct format, is not expired, and is properly signed, the method returns the decoded ID token. You can grab the uid of the user or device from the decoded token.
Then, use the verifyIdToken method to verify an ID token:. ID token verification requires a project ID. First, find a third-party JWT library for your language. Then, verify the header, payload, and signature of the ID token.
Finally, ensure that the ID token was signed by the private key corresponding to the token's kid claim. Use the value of max-age in the Cache-Control header of the response from that endpoint to know when to refresh the public keys.
If all the above verifications are successful, you can use the subject sub of the ID token as the uid of the corresponding user or device.
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Add and manage data. Read data. Secure and validate data. Usage, limits, and pricing.Whenever a token is refreshed in Android, it should call the onTokenRefresh method: Called when the system determines that the tokens need to be refreshed.
The application should call getToken and send the tokens to all application servers.
Is FCM token refreshed on app update? To authorize access to FCM, request the scope. In the newest version of the SDK, the server type is no longer required you should update your SDK version if you're not on the latest version. Deleting the InstanceID instance forces a token refresh as well. What is a Device token?
Now I want to know. It allows gateways and push notification providers to route messages and ensure the notification is delivered only to the unique app-device combination for which it is intended.
Google announced today that any phone running Android 7 or higher can now be used as a security key for two-factor authentication. So when you need a second device to verify your login, you can. The onTokenRefresh method is going to be called whenever a new token is generated. Upon app install, it will be generated immediately as you have found to be the case.
It will also be called when the token has changed. According to the FirebaseCloudMessaging guide:. How to force token refresh? So I can check if the token refresh is being "intercepted". What I would suggest is that you save the token in the onTokenRefresh method to internal storage or shared preferences. Then, retrieve the token from storage after a user logs in and register the token with your server as needed. If you would like to manually force the onTokenRefreshyou can create an IntentService and delete the token instance.
Firebase Notifications. How to refresh tokens after app updateAndroid. I sent notifications and app received notifications. That means token is not refreshed. Problem is in iOS. It works fine in Android. Android returned a new token. Plugin version: 1. Cannot migrate to newer version right now iOS: tested in 8. The refresh token is a standard OAuth 2. Refresh tokens expire only when one of the following occurs: The user is deleted.
In what period does the firebase's app token changes and how toI'm using firebase. Unlike the ID. As stated in the documentation here the token doesn't expire it only changes on certain events. Whenever a new token is generated a method onTokenRefereshId is called.
Try uninstalling and reinstalling the app to force the generation of a new token, this would cause onTokenRefresh to be called. I had the same problem like you. Try re-install the app, by uninstall it first from your device or emulator. It will then generate a new token, thus onTokenRefresh will be called again. In my case, I tried everything but onTokenRefresh was never called.
Previous WiFi has good internet connectivity, Don't know why it was happening. May be this can help someone. I have experienced that MyFirebaseInstanceIDService is not called when you are running your application on a device where internet connectivity is not available.
In this way onTokenRefresh is not called. So make sure that your device must has internet connection during running your application for taking updated FirebaseToken. The registration token change when:. There are several reasons to not calling the onTokenRefresh methon not called. I have listed that and mention it one by one.
I've been struggling with that for over an hour, then I changed the following code and it suddenly worked.
Also if you want to call onTokenRefresh more explicitly, you can simply call that anywhere in your code:. I had the same problem. My device kitkat 4. My internet connection was perfect, google play services was up to date and all necessary contiditions for firebase to work were met. My code worked perfectly on the devices 5.
To solve this issue i had to reset my device to factory settings and application started to work. I know it's tough measure but maybe it may help somebody. There must be some problems or conflict with other application, which caused onTokenRefresh not to be called. Good luck! Learn more. Firebase onTokenRefresh is not called Ask Question. Asked 4 years, 5 months ago. Active 1 year, 4 months ago. Viewed 69k times.We are overriding the method OnTokenRefreshso we can update our server when the device token changes over time.
Example: My users have installed my app, and are receiving notifications. At some point i am placing an app in the appstore, and most users autodownloads it in the background. I believe that an app update invalidates the token, so it needs to be updated. Basically: How do i update my tokens when a background app is replaced, so my notifications will still reach the user?
Xamarin Inc. Xamarin Menu About What is Xamarin? What is Xamarin. July in Xamarin. I am uncertain on how to refresh my firebase tokens when updating the app. Token; Log. Tagged: notifications update devicetoken firebase. Best Answer. July Accepted Answer. Ok, it took me the most of the day to make tests but the conclusion is: When updating from one version to another in release mode, your token does not change.
The updated app can still receive updates. All in all, Firebase is imho much nicer than GCM. I will switch very soon.
When a new user installs my app, the onTokenRefresh is automatically being called. The problem is that the user is not logged in yet No user id. The onTokenRefresh method is going to be called whenever a new token is generated. Upon app install, it will be generated immediately as you have found to be the case. It will also be called when the token has changed. You can target notifications to a single, specific device. This means that the token registration is per app.
It sounds like you would like to utilize the token after a user is logged in. What I would suggest is that you save the token in the onTokenRefresh method to internal storage or shared preferences. Then, retrieve the token from storage after a user logs in and register the token with your server as needed. If you would like to manually force the onTokenRefreshyou can create an IntentService and delete the token instance. Then, when you call getToken, the onTokenRefresh method will be called again.
This class is deprecated. Once that has been implemented, this service can be safely removed. You can access the token's value by extending FirebaseInstanceIdService.
Make sure you have added the service to your manifestthen call getToken in the context of onTokenRefreshand log the value as shown:. It will Called when the system determines that the tokens need to be refreshed. The application should call getToken and send the tokens to all application servers. This will not be called very frequently, it is needed for key rotation and to handle Instance ID changes due to:. The system will throttle the refresh event across all devices to avoid overloading application servers with token updates.
Note: If your app used tokens that were deleted by deleteInstanceID, your app will need to generate replacement tokens. I am maintaining one flag in shared pref which indicates whether gcm token sent to server or not. This method checks if user id is not empty and gcm send status then send token to server.
This is in RxJava2 in scenario when one user logout from your app and other users login Same App To regerate and call login If user's device didn't have internet connection earlier at the time of activity start and we need to send token in login api.
I got incoming messages. Because I am not an Android developer, just a backend developer. So it takes me some time to solve it. But finally, I find a convenient way to get it. Just use debug mode to install the sample app and you can get the token when you first time to install it.
But I don't know why it can't print the log when I install it. Maybe be related to the mobile system. And then why I can't get the Notification. The quick solution is to store it in sharedPrefs and add this logic to onCreate method in your MainActivity or class which is extending Application. A better option is to create a service and keep inside a similar logic.
Firstly create new Service. I've implemented "Token to Server" logic like this:.
Verify ID Tokens
Keep in mind that token is per device, and it can be updated by Firebase regardless of your login logic. So, if you have Login and Logout functionality, you have to consider extra cases:.
If play service working properly then FirebaseInstanceId. You need to call sendRegistrationToServer method which will update token on server, if you are sending push notifications from server. The method getToken is deprecated. You can use getInstanceId instead.
In firebase-messaging Learn more. Asked 4 years, 4 months ago. Active 13 days ago. Viewed k times. It's my first time using FCM. I want to know can FCM be used? GCM everything is ok. Solution: Because I am not an Android developer, just a backend developer. Emi Raz 8 8 silver badges 18 18 bronze badges. No ,the sample app said. It will only show the token in logcat if I hit the button.Firebase Authentication sessions are long lived.
Every time a user signs in, the user credentials are sent to the Firebase Authentication backend and exchanged for a Firebase ID token a JWT and refresh token. Firebase ID tokens are short lived and last for an hour; the refresh token can be used to retrieve new ID tokens. Refresh tokens expire only when one of the following occurs:.
With these capabilities, you have more control over user sessions. The SDK provides the ability to add restrictions to prevent sessions from being used in suspicious circumstances, as well as a mechanism for recovery from potential token theft.
You might revoke a user's existing refresh token when a user reports a lost or stolen device. Similarly, if you discover a general vulnerability or suspect a wide-scale leak of active tokens, you can use the listUsers API to look up all users and revoke their tokens for the specified project. Password resets also revoke a user's existing tokens; however, the Firebase Authentication backend handles the revocation automatically in that case. On revocation, the user is signed out and prompted to reauthenticate.
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Here is an example implementation that uses the Admin SDK to revoke the refresh token of a given user. To initialize the Admin SDK follow the instructions on the setup page. Because Firebase ID tokens are stateless JWTs, you can determine a token has been revoked only by requesting the token's status from the Firebase Authentication backend. For this reason, performing this check on your server is an expensive operation, requiring an extra network round trip.
You can avoid making this network request by setting up Firebase Rules that check for revocation rather than using the Admin SDK to make the check.
To be able to detect the ID token revocation using database rules, we must first store some user-specific metadata. Save the refresh token revocation timestamp. This is needed to track ID token revocation via Firebase rules. This allows for efficient checks within the database. In the code samples below, use the uid and the revocation time obtained in the previous section. To enforce this check, set up a rule with no client write access to store the revocation time per user.
This can be updated with the UTC timestamp of the last revocation time as shown in the previous examples:. Any data that requires authenticated access must have the following rule configured. This logic only allows authenticated users with unrevoked ID tokens to access the protected data:. In your server, implement the following logic for refresh token revocation and ID token validation:.
When a user's ID token is to be verified, the additional checkRevoked boolean flag has to be passed to verifyIdToken. If the user's token is revoked, the user should be signed out on the client or asked to reauthenticate using reauthentication APIs provided by the Firebase Authentication client SDKs.
To initialize the Admin SDK for your platform, follow the instructions on the setup page. Examples of retrieving the ID token are in the verifyIdToken section.