Messages are reported as successfully sent, but no pop-up notifications appear.
With onMessage it is sometimes possible to log the message.
Requesting an FCM token only works on localhost.
When tried on the .com site, the error message depends on whether I use the PC or chromebook - the error messages generated are different.
I have used 2 different devices, but always Chrome browser. The cloud function writes the message and the FCM response to the function log, so it confirms success in sending.
When I deleted onMessage from the recipient webpage there was no sign of any notification.
The webpage is open during these trials. This is web/javascript.
Notification permission is set to allow, in both devices.
I have spent hours on web searches trying to find any hint as to what to try.
firebase-messaging-sw.js
importScripts('https://www.gstatic.com/firebasejs/3.9.0/firebase-app.js');
importScripts('https://www.gstatic.com/firebasejs/3.9.0/firebase-messaging.js');
firebase.initializeApp({
'messagingSenderId': '593287500713'
});
const messaging = firebase.messaging();
the relevant code which runs with the webpage
messaging.onMessage(function (payload) {
console.log('Message received. ', payload);
});
I assume that without onMessage, the notifications should appear based on the Firebase SDK, but they don't. WRONG ASSUMPTION
When in the background, nothing appears. (I think notifications are supposed to appear automatically.)
I can request and receive an FCM token when running on local host but the same code throws an error when deployed. "Request is missing required Authentication..."
I have been in contact with support # Google who have assured me that this suggestion, and then another would 100% fix the problem. Nothing made any difference.
I have tried the code snippets in the Firebase docs and also github examples.
If I could find existing code that works, that would be a great start, because I think that finding a solution after about 40 hours of effort is hopeless.
Have I missed something obvious?
UPDATES....
I have found two reasons for not seeing notifications.
1) My PC had a setting which seems to have partially suppressed the display. Unexpected because YouTube notifications do display. (Open notification tray on far right bottom of screen. "focus assist" with a crescent moon symbol. If when clicked it says "on" or "alarms only" I think this restricts what is seen.)
2) My assumption based on the Firebase docs and video was that onMessage() is to prevent notifications when the user is on the webpage and to allow the developer to ignore or handle the notifications within the page. Half right. Apparently the notifications are default ignored UNLESS onMessage() does something with them. The docs give snippets of code for onMessage() but only how to log to the console.
Also, found an amusing problem. Now that my PC has registered the recipient of the messages, it receives them even if that recipient is signed out and has signed in on another device. That sounds like a problem.
The currently working version of the code. This goes in the webpage / app (NOT in the messaging-sw.js file
The introductory video to messaging suggests that it is bad UX to have notifications from a website popping up when someone is on the website. Therefore the code can include onMessage() to either ignore the notification or to handle it within the page.
The docs give a version of onMessage that just logs the notification to the console and has just a comment about doing something else.
Other parts of the docs explain that the system automatically displays notifications.
Therefore I inferred that without onMessage() the notifications would appear automatically.
It seems I was wrong.
It has taken me a massive amount of time to figure this out and to find some code to make the notifications appear. (Even now I am not sure I have grasped what is happening, but the following seems to work)
This goes in the web page / app. (Not in the messaging-sw.js. Putting it there will throw an error "using window methods")
[Do note that I also found my PC was set in a way that seemed to allow YouTube to send notifications, but was preventing the display of FCM notifications. (See explanation in question)
So far I have tested this when the use has the webpage open, the webpage in the background and when the browser is closed. Notifications appear with the default sound and are listed in the notification tray.
This also happens if the recipient is signed out of the webpage and signed in on another device.. the messages continue to go to the same device.
Messages go to devices not to users]
messaging.onMessage(function (payload) {
try{ //try???
console.log('Message received. ', payload);
noteTitle = payload.notification.title;
noteOptions = {
body: payload.notification.body,
icon: "typewriter.jpg", //this is my image in my public folder
};
console.log("title ",noteTitle, " ", payload.notification.body);
//var notification = //examples include this, seems not needed
new Notification(noteTitle, noteOptions);//This can be used to generate a local notification, without an incoming message. noteOptions has to be an object
}
catch(err){
console.log('Caught error: ',err);
}
});
``````````
I'm having an issue with FCM on flutter. I have implemented messaging from my server so I'm storing my phone token for each user.
The thing is that when a user logs in for the very first time everything works properly, messages are being sent and user gets notified.
If I do not use the app during the weekend, on Monday I try to send a message by doing some actions on my app but messages are not being sent. I can see my token stored properly in my database.
I'm using firebase_messaging 2.1.0 for flutter.
This is how I get my token
_fireBaseMessaging.getToken().then((token){
_myPhoneToken = token;
});
1-I know token may change when:
App deletes Instance ID
App is restored on a new device
User uninstalls/reinstall the app
User clears app data
But none of this happens.
Any advice on how to handle this scenario? thanks in advance.
UPDATE
Provided you have setup the FCM sdk the right way (but you said that it works the fist time you install the app, so I guess so).
Provided that you are sure that the device_token you are using is the one of the device on which you are expecting to receive the notification (check if it's still the same), you should get on this device your notification quite soon if you use "priority" : "high".
{
"to" : "device_token",
"priority" : "high",
"notification" : {
"sound": "default",
"body" : "Test Notification body",
"title": "Test Notification title"
}
}
This method call
_firebaseMessaging.getToken().then((String token)
return always the new token even if it has been updated. So if you print this out on your device and you send a notification on this token without error, there's no reason why you should not get the token if the device has a valid internet connection active.
It's true that the device token can change during time. If you uninstall and reinstall the app, you can see the token will change and if you try to send a notification on the old one, you will get an error.
If instead the token will change during application lifetime, you can be notify on your server side by listening:
_firebaseMessaging.onTokenRefresh.listen((newToken) {
_fcm_token = newToken;
// send the new fcm to your server
});
So first of all I suggest you to be able to send a notification to a device with Postman. Check if the token you are using is still the one on the device. Then you can try to uninstall and reinstall the application and try to use the old token. You will get an error. Then try to send to the new one, and you should get your notification.
Then wait for some days and try again, check if the token has changed or not and if it's not changed you should be able to send the notification without problems with the same token.
Also be aware that data message on Android if the app is terminated are still not supported.
Some networks/router/mobile can cut the connection between firebase library and firebase server due to inactivity (5min without message). This cut may be detected by the library up to 30min (FCM heatbeat interval).
These are some links discussing this issue:
https://github.com/firebase/quickstart-android/issues/307
Android: Delay in Receiving message in FCM(onMessageReceived)
I contacted firebase support but they told that since the issue is caused by external part they cannot fix it (I suggest decreasing heartbeat interval ...)
I fixed it in android using an interval job which apply these instructions:
context.sendBroadcast(new Intent("com.google.android.intent.action.GTALK_HEARTBEAT"));
context.sendBroadcast(new Intent("com.google.android.intent.action.MCS_HEARTBEAT"));
You may write this specific code for Android side and should find something similar for ios side.
I have an application that uses Google FCM for sending push notifications.
When i send a push notification to a group of users, i get a response of MismatchSenderId for some of them. Even though, all users have the exact same application. How can some of the users get a success response and others get a MismatchSenderId?
I have researched a lot and made sure I have added all prerequisites that FCM needs.
Any suggestions?
EDIT:
Sample response:
{"multicast_id":5340432438815499122,"success":0,"failure":1,"canonical_ids":0,"results":[{"error":"MismatchSenderId"}]}
EDIT 2:
Here is the server side sending code (PHP):
$fields = array
(
'to' => $token,
'data' => $data
);
$headers = array
(
'Authorization: key=AIza**************************',
'Content-Type: application/json'
);
$ch = curl_init();
curl_setopt( $ch,CURLOPT_URL, 'https://fcm.googleapis.com/fcm/send' );
curl_setopt( $ch,CURLOPT_POST, true );
curl_setopt( $ch,CURLOPT_HTTPHEADER, $headers );
curl_setopt( $ch,CURLOPT_RETURNTRANSFER, true );
curl_setopt( $ch,CURLOPT_SSL_VERIFYPEER, true );
curl_setopt( $ch,CURLOPT_POSTFIELDS, json_encode($fields) );
curl_exec( $ch );
curl_close( $ch );
UPDATE:
It seems that the issue has been resolved with the SDK updates. I am using now the latest com.google.firebase:firebase-messaging:9.6.1, I don't get "MismatchSenderId" anymore.
Firebase has upgraded their server keys to new version.
Use new keys instead of old one.
go to settings->project settings->cloud messaging tab
I found this solution:
First I check server key is correct or not it was correct which is
like AIzaXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Then I check Sender Id like 79XXXXXXXX it was also correct.
Main issue was in device_ID(UDID) to whom I have to send the notification. Actually DeviceId we got on android side in FCM is different than GCM. You can't use GCM created DeviceId in FCM.
Just an FYI. I was running into this error, even though I swear the android app I was testing was built with the latest/greatest google-services.json file and I could send from the FCM console to the app.
I rebuilt the app after doing a Clean Project and now I can send to the app with the FCM token it registers. So, maybe try a clean rebuild before beating your head against the wall for too long.
THIS WORKED FOR ME:
CHECK WHICH FIREBASE PROJECT YOUR CURRENT ANDROID PROJECT IS LINKED TO AND USE
Server Key FROM THAT PROJECT.
I was using Server key from a different firebase project(say Project 2). I used the same server key as linked with my android project(Say Project 1) and it worked. In my experience, using one firebase app for one entire android project seemed to fix the problem.
In my case, I just was mistaking about project credentials: using google-services.json from one project, and server key from another.
We spent hours and hours to resolve this issue. What we found that token was being generated using different FCM account settings (google-services.json) and notification was being set using different FCM account.
When we synced both it worked like a charm.
My problem was solved by entering the correct key as shown below.
Copy Server key like this picture
And then copy this code in post man like this picture
and Body is row like this picture
NOTE:
You must add key= before Server key in header
Make sure you enter the header keys correctly (Authorization =
"key=..." and ContentType = "application/json")
You have sent the request to the correct address
(https://fcm.googleapis.com/fcm/send and Post method)
I cross verified all the credentials
Added new server key and deleted old one
Downloaded google-services.json again
Nothing solved the issue
Then I just clean the project and then rebuild the project.After that it's working fine
I found that the senderId is different from the project number in the FCM console
so I re-downloaded google-services.json and everything works fine
Make sure you remove all the Parse code from your app (libraries, receivers in AndroidManifest, etc). I found that intermittently push notifications were not working. From my observations, it would work on fresh installs but not app updates from the play store.
I believe something internal to Parse was conflicting with FCM (Parse uses GCM, so I'm guessing it had to do with using GCM and FCM simultaneously). As soon as I ripped out all the Parse receivers and libraries, things worked great.
Actually there are many reasons for this issue.
Mine was because of Invalid token passed.
I was passing same token generated from one app and using same token in another app.
Once token updated , it work for me.
I spent hours on this and finally figured it out. This problem happens if service account your sender application is using differs from the service account your receiver is using.
You can find out your receiver service account via Firebase -> Project Overview -> Project Settings -> Service Accounts and generate a new key and use that key when you are initializing your FirebaseApp in the sender:
FileInputStream serviceAccount = new FileInputStream("YOUR_PATH_TO_GENERATED_KEY.json");
GoogleCredentials googleCredentials = GoogleCredentials.fromStream(serviceAccount);
FirebaseOptions options = new FirebaseOptions.Builder().setCredentials(googleCredentials).build();
firebaseApp = FirebaseApp.initializeApp(options);
This initialization need to be done once before you send push notifications.
In my case, I had done everything correctly and I still had this problem. I had made some changes in the "google-services.json" used in the receiver app and I noticed AndroidStudio was not using my new file. The solution was so simple:
AndroidStudio -> Build -> Clean Project and Build -> Rebuild Project
For eliminate this error for mismatch sender Id In fcm
{"multicast_id":7751536172966571167,"success":0,"failure":1,"canonical_ids":0,"results":[{"error":"MismatchSenderId"}]}
there is error occured,
So we required first, In FCM, register Application e.g MyDemoApplication
After that FCM will generate server key i.e AIzaSyB9krC8mLHzO_TtECb5qg7NDZPxeG03jHU and sender Id i.e 346252831806 these format like these.
After In Android Studio, our project is connect to these FCM created project i.e MyDemoApplication
And most important step is there required to device token or registration id. These token must created in Android Studio..
After that using Sender Id and API key in web API project u will be definitely getting notification
I had the same issue in my react-native - node.js project.
I wanted to send notifications in android.
Everything was set-up and working fine (i.e. I was able to send notifications from node.js and receive notifications on android device).
After a few days, I had to use a different firebase account, so I changed the google-services.json file in my project's android/app folder and rebuilt the project. But, when I tried sending notification from my server once again, I got an error -
{.............
errorInfo: {
code: 'messaging/mismatched-credential',
message: 'SenderId mismatch'
},
codePrefix: 'messaging'
}
Solution:
the XML file at the location -
app/build/generated/res/google-services/{build_type}/values/values.xml was not getting automatically updated according to new google-services.json.
It still consisted of old values from my previous google-services.json file. I had to change values.xml file manually.
This is how app/build/generated/res/google-services/{build_type}/values/values.xml file look (You need to change it manually if it does not get updated automatically according to google-services.json)-
<?xml version="1.0" encoding="utf-8"?>
<resources>
<! -- Present in all applications -->
<string name="google_app_id" translatable="false">1:1035469437089:android:73a4fb8297b2cd4f</string>
<! -- Present in applications with the appropriate services configured -->
<string name="gcm_defaultSenderId" translatable="false">1035469437089</string>
<string name="default_web_client_id" translatable="false">337894902146-e4uksm38sne0bqrj6uvkbo4oiu4hvigl.apps.googleusercontent.com</string>
<string name="ga_trackingId" translatable="false">UA-65557217-3</string>
<string name="firebase_database_url" translatable="false">https://example-url.firebaseio.com</string>
<string name="google_api_key" translatable="false">AIzbSyCILMsOuUKwN3qhtxrPq7FFemDJUAXTyZ8</string>
<string name="google_crash_reporting_api_key" translatable="false">AIzbSyCILMsOuUKwN3qhtxrPq7FFemDJUAXTyZ8</string>
<string name="project_id" translatable="false">mydemoapp</string>
</resources>
You can refer to these links:
https://firebase.google.com/docs/projects/multiprojects
Processing the JSON file: https://developers.google.com/android/guides/google-services-plugin#processing_the_json_file.
I got this Error after I added more Product Flavours to my current App,
it seems like it uses the package name to generate the FCM Token, so to reslove the issue I have to add an app for eatch Flavour with it's corresponding PackageName, and update the google-services.json file with the latest generated one wich include Client info for each Flavour(Package Name).
check gcm_sender_id in manifest.json
If mismatch - correct, but you need make new subscribers for new sender Id.
Exists subscribers break.
As per response "MismatchSenderId", this is a mismatch between FireBase and your local "google-services.json", you have to make sure that both manifests matches
In FireBase console you go to "YourProject > Project OverView > Cloud Messaging" you'll see the "SenderID" which MUST match with the "google-services.json" in your Android project.
Best thing you can do is download the final json file from "General" tab and place it in your project.
I had the same error while trying to send push notificaion. Get the updated google-services.json file and replaced with it. Worked for me.
I was trying to send notification using the fcm api "https://fcm.googleapis.com/fcm/send" from postman. Server key was ok and token was pasted fine but was still getting error "MismatchSenderId".
Then introduced the follwoing dependency in the gradle file on android side.
implementation platform('com.google.firebase:firebase-bom:25.12.0')
and it started receiving notifications on the device
Make sure that your "package_name" in the google-service.json file is your applicationId from build.gradle(app) file.
"client_info": {
"mobilesdk_app_id": "",
"android_client_info": {
"package_name": "" // -> your applicationId
}
}
I found the reason for this problem after 5 years of using Firebase.
Of course, this happened to me when I tried to get a new google-services.json file for old projects.
When you receive the new file, you must use the latest version of google-services.
classpath 'com.google.gms:google-services:$.$.$'
Updating firebase initialization works for me..
<script src="https://www.gstatic.com/firebasejs/4.6.2/firebase.js"></script>
<script>
// Initialize Firebase
// TODO: Replace with your project's customized code snippet
var config = {
apiKey: "<API_KEY>",
authDomain: "<PROJECT_ID>.firebaseapp.com",
databaseURL: "https://<DATABASE_NAME>.firebaseio.com",
storageBucket: "<BUCKET>.appspot.com",
messagingSenderId: "<SENDER_ID>",
};
firebase.initializeApp(config);
</script>
For me the problem was that I was using the phonegap-plugin-push in cordova, testing the app with the phonegap app.
The problem with this is that for some reason with this plugin, the phonegap app intercepts it and returns a dummy registration key, no matter what sender ID you have.
So to make it work (as long as you have all your keys right) is to test your program some other way, with an emulator, or android emulation via usb. And your keys will match.
Hopefully this saves someone some time.
your probably doing whwat i was doing. GCM token is not the same as FCM anymore. check if your pulling the GCM token ID instead of FCM. just override FirebaseInstanceIdService & ensure your getting the right ID. i thought at one point they were the same but now there not. i logged a test and saw. after you do that also update google-services.json like others say as a safety.
I wasted days on this.
In my case, I followed this blog to use Postman and get the mismatchsenderid error. Previously, I was getting messaging/mismatched-credential, and people reported that their client app used multiple projects.
However, for me, I have one-to-one, a web app and a project. BUT, I host all apps via ng serve on default port 4200. So regardless of what project / app pair I was developing on, I would always get the same token from my client web app using AngularFireMessaging.requestToken - this token was always the token created on my first ever run of a firebase app in development.
As a work around, I start different apps / projects on different ports and get proper tokens for respective projects.
Note: I had truncated the first part of the FCM token (before :) and the error was MismatchSenderId
Fixed my script and now everything works fine.
In my case someone had deleted APN SSL Certificates for my app in Apple development portal.
I needed to create new certificates: Identifiers / My AppId / Push Notifications / Edit.
Then I uploaded them to the Firebase project from console: Project Settings / Cloud Messaging / iOS app configuration / APNs Certificates.
This solved the problem.
In my case it was very simple. I was pulling the wrong registrationId from the database. After I pulled the correct Id, it worked.
I had big trouble figuring out why I was getting a "MismatchSenderId" status.
I added the gms dependency in the root build.gradle but my error was actually not applying the gms plugin in the app build.gradle.
If you have don't have this line in the app build.gradle, this could be the reason why the notification are not working:
apply plugin: 'com.google.gms.google-services'
I have noticed that when a device id is created in GCM you cannot send push messages through FCM using the new server key, you have to use the old API-key.