I have seen this topic discussed before, but I think it’s not the same scenario.
I’m trying to send push notification from one device (going to be an admin device) through FCM (Firebase Cloud Messaging) to all other devices, and i’m going exactly by their docs.
I have tried to subscribe to topics or keep it simple still getting the same error:
MissingRegistration
String jsonData = "{"to":"/topics/news","notification":{"title":"title","body":"text" }}";
byte[] postData = jsonData.getBytes(Charset.forName("UTF-8"));
int postDataLength = postData.length;
URL url = new URL("https://fcm.googleapis.com/fcm/send");
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setDoInput(true);
con.setDoOutput(true);
con.setInstanceFollowRedirects(true);
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type","application/json");
con.setRequestProperty("Authorization","key=AIzaSyB70J***-z34q2_h*******qjZsM5zBIf8Y"); //I've added stars :-)
con.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
con.setRequestProperty("Content-Type","charset=UTF-8");
con.setRequestProperty("Content-Length",Integer.toString(postDataLength));
con.setUseCaches(false);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.write(postData);
InputStream inputStream= con.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
String line = null;
String outPut = "";
while (((line = reader.readLine()) != null)){
outPut += line;
}
asked Aug 7, 2016 at 12:35
I was using/trying to send FCM Push notification using Postman web API Client app, to FCM URL: https://fcm.googleapis.com/fcm/send
And I had used a wrong Content-Type: application/x-www-form-urlencoded, So I changed it to
Content-Type: application/json
This is basically required, as we are sending the Push Notification as a JSON Payload.
Cheers!
answered May 21, 2018 at 5:33
Randika VishmanRandika Vishman
7,9133 gold badges58 silver badges80 bronze badges
1
I also got the same error, but mine was on the server side(push from rails to android), but my problem was that i had forgot to specify the content type in the header(i am using RestClient to post to firebase). Hope it might help someone
RestClient.post( "https://fcm.googleapis.com/fcm/send",
{:to => reg_id,:notification => options }.to_json,{:content_type => :json, :accept => :json,:Authorization => "key=*****"}
answered Aug 13, 2016 at 7:28
Leo MuchLeo Much
5994 silver badges6 bronze badges
Thank you for posting your answer,
anyway my codes works now,
all I had to do is change the content-type (I have just copied from firebase docs the content-types )and send it to a subscribe topic….
now all my users can get the notification from my device :-).
answered Aug 14, 2016 at 8:52
XcodeNOOBXcodeNOOB
2,1154 gold badges23 silver badges28 bronze badges
Android Question Firebase FCM Missing Registration Error
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Thread starter
VictorTandil
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Start date
Jun 23, 2017 -
Similar Threads
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#1
Good morning. I have two questions about the FCM service.
1) What is the line of code that registers the user on the FCM server?
Would it be next?
In that case, every time the App goes to «Resume» should I initialize it again?
On some occasions (not always) I get the error when sending a message that says «MissingRegistration».
2) Does the API_KEY change from time to time?
Approximately every two weeks, the key in the console changes without warning, which blocks users to send messages. This is normal?
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#2
Based on the Firebase tutorial this line is in the firebaseMessaging service which, itself, is started from the starter service.
So, you dont need to do anything more than to start your app. Everytime you start the app, a token will be aquired. It may be the same token for days/weeks.
But it can happen that it changes! There is a event for this…
So, in your subscribetotopics you can call a server app on your server to give the token to your server. The server itself stores the token in a database or whatever.
Use the values stored in your server to send pushes.
741 votes
0 answers
Get the solution ↓↓↓
index.html
<html>
<title>Firebase Messaging Demo</title>
<style>
div {
margin-bottom: 15px;
}
</style>
<body>
<div id="token"></div>
<div id="msg"></div>
<div id="notis"></div>
<div id="err"></div>
<script src="https://www.gstatic.com/firebasejs/7.2.1/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.2.1/firebase-messaging.js"></script>
<!-- For an optimal experience using Cloud Messaging, also add the Firebase SDK for Analytics. -->
<script src="https://www.gstatic.com/firebasejs/7.2.1/firebase-analytics.js"></script>
<script>
MsgElem = document.getElementById("msg");
TokenElem = document.getElementById("token");
NotisElem = document.getElementById("notis");
ErrElem = document.getElementById("err");
// Initialize Firebase
// TODO: Replace with your project's customized code snippet
var config = {
apiKey: "AIzaSyCi6tjFP-VV71i__mHWgAN3uHkV3QXpPQv",
authDomain: "my-app-3ab21.firebaseapp.com",
databaseURL: "https://my-app-3ab21.firebaseio.com",
projectId: "my-app-3ab21",
storageBucket: "my-app-3ab21.appspot.com",
messagingSenderId: "368038679727",
appId: "1:368038679725:web:fb79116bcac4c6894be225"
};
firebase.initializeApp(config);
const messaging = firebase.messaging();
messaging
.requestPermission()
.then(function () {
MsgElem.innerHTML = "Notification permission granted."
console.log("Notification permission granted.");
// get the token in the form of promise
return messaging.getToken()
})
.then(function(token) {
TokenElem.innerHTML = "token is : " + token
})
.catch(function (err) {
ErrElem.innerHTML = ErrElem.innerHTML + "; " + err
console.log("Unable to get permission to notify.", err);
});
messaging.onMessage(function(payload) {
console.log("Message received. ", payload);
NotisElem.innerHTML = NotisElem.innerHTML + JSON.stringify(payload);
//kenng - foreground notifications
const {title, ...options} = payload.notification;
navigator.serviceWorker.ready.then(registration => {
registration.showNotification(title, options);
});
});
</script>
</body>
</html>
curl-test(shell script)
curl -X POST -H "Authorization: key=AAAAVbDQlK0:APA91bGz7rxEi96dfTvCaHoqx0za_mNZzLEuqdebRuJ_h2Cv1zbuKqkBJvXaCA5nuBiSmiYqQX0p6sUqZIbT_x9mgDf_0MrTg2fYeG0ecng5dmygJVckdYp_fha969Rfn4jTQ7G30yJx" -H "Content-Type: application/json"
-d '{
"data": {
"notification": {
"title": "FCM Message",
"body": "This is an FCM Message",
"icon": "/itwonders-web-logo.png",
}
},
"to": "<DEVICE_REGISTRATION_TOKEN>"
}' https://fcm.googleapis.com/fcm/send
I am create a web application push notification using FCM when I run it then ask me toallow or block notification and when I allow notification then it show token and a messageNotification permission granted. but when I try to push notification to get message ofcurl file throughPostman then it through an error i.e.Error=MissingRegistration.
So, How can I fix this? Please help me.
Thank You
2021-11-23
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Date the issue was resolved:
2021-11-23
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For Firebase, You can get info from https://firebase.google.com/docs/cloud-messaging/http-server-ref#error-codes
Check that the request contains a registration token (in the
registration_id in a plain text message, or in the to or
registration_ids field in JSON).
For the new cloud Message, when you want to send a dwonstream message from the server, you need to use «to» to declaim the target registration id.
like below :
https://gcm-http.googleapis.com/gcm/send
Content-Type:application/json
Authorization:key=AIzaSyZ-1u...0GBYzPu7Udno5aA
{ "data": {
"score": "5x1",
"time": "15:10"
},
"to" : "APA91bHun4MxP5egoKMwt2KZFBaFUH-1RYqx..."
}
You probably forgot to specify the content type in the header to be JSON.
Content-Type: application/json
If Content-Type is omitted, the format is assumed to be plain text.
And for plain text the registration ID is passed in a parameter called registration_id instead of registration_ids, which explains your MissingRegistration error.