I want to send automatic push notifications to my clients who are installing my flutter application. Can I do it without getting their device tokens. I am using firestore as my database
You can send messages to client apps using topic messaging, but each client app will need to be subscribed to the named topic. You will not be able to single out a specific device without a device token.
Related
I am coding a React Native app and I using Firebase push notification service.
In my app, users can send message for each other and I want to notify them when they get message.
I found one way for native android I can code for react native it is not problem just I want to know if there is better way. I can make post to directly to Firebase service with using Http post.
This is the link which way I found: https://blog.usejournal.com/send-device-to-device-push-notifications-without-server-side-code-238611c143
I want to push notification to specific device without server, is there another way to do this?
Sending a message to a device with Firebase Cloud Messaging requires that you specify the FCM server key. As its name implies, this key is supposed to only be used in trusted environments, as knowing it allows one to send any message they want to all users of the app. For this reason it is not possible to secure send messages directly from one device to another device with FCM.
Instead you will have to run code in a trusted environment, such as your development machine, a server you control, or Cloud Functions. Your client-side application code invokes the server-side code, that ensures the call is authorized, and then calls the FCM API.
For more on this see:
How to send one to one message using Firebase Messaging
How to send device to device messages using Firebase Cloud Messaging?
Do I need to open the app at least once in order for my phone to receive a push notification?
The must run at least once so it can collect a device ID token and send that to the backend that will send the message. Without that token collected, the app can never receive a message on that device.
Read more about it: What is FCM token in Firebase?
Actually you do not need the device token to send/receive the messages.
However, it is required that the user give permission to receive notifications, and that would only happen during runtime. I tested this and can confirm it works. The device token is only used to subscribe users to specific topics, but you can send a message to all users that have your app installed without needing to specify device tokens.
I haven't seen any examples of this, but I want to purely interact with Firebase through the backend, and not the frontend with Javascript.
I have auth tokens being minted on my Go backend when a new user is added and then these users are written into a mongo database.
What I want is to be able to get a messaging token for my users, and then add it to their user document in mongo, that'll be used to send messages through the backend.
The reasoning is that we don't want to have to communicate with Firebase on our frontend.
Is this even possible?
If you want to send a message directly to a device with Firebase Cloud Messaging, you will definitely need some information from the client. There is no avoiding following the setup instructions on the client. In particular, you will have to handle the registration token on the client and send it to your backend so it can send the messages.
The Firebase Authentication token will not be useful to you at all for sending messages. FCM doesn't send messages to users - it sends messages to devices (or topics). You will have to figure out for yourself which devices belong to which users.
Is it possible to send upstream messages from a device using the Firebase JavaScript SDK?
For example, would it be possible to send a push notification to another device without the use of an external server?
Yesterday Google has announced a new set of tools for Firebase, one of them was Notifications the ability to send notifications from server to devices which are using my app.
But can we now notify users when they receive a new message?
And if not, is there a way around to achieve this?
Looking at the documentation, this doesn't seem currently possible automatically. Here is a possible way to accomplish it "manually" with another server:
Subscribe a user to it's own user ID
In android
FirebaseMessaging.getInstance().subscribeToTopic("InsertUserIDHere");
In IOS
[[FIRMessaging messaging] subscribeToTopic:#"/topics/InsertUserIDHere"];
Setup an outside server that checks every sent messages. When a message is sent, the server should create a notification that includes the recipient's user ID as the topic.
Look here for more info.
You can send messages to group of users (targeting a specific "topic") or to a single device (targeting a Firebase Cloud Messaging token).
To subscribe a device to a topic use:
FirebaseMessaging.getInstance().subscribeToTopic("topicName");
To obtain the device token use (*1) :
FirebaseInstanceId.getInstance().getToken();
Then you can use the Firebase Notificaitons web console, or the FCM server API if you want to send messages from your server.
See: https://firebase.google.com/docs/cloud-messaging/downstream#sending_topic_messages_from_the_server
Notes:
[1] getToken() can return null if the token is not yet available.
You can use the callback onTokenRefresh() to be notified when the token is available and when the token is rotated.
See: https://firebase.google.com/docs/cloud-messaging/android/client#sample-register