可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):

问题:

So I need to implement web push notifications in our web app, I have successfully setup the firebase cloud messaging in my app with the help of docs, I'm able to ask the user to allow permission for notifications and get the token id as well if he accepts the permission.

The thing is when I try to send a notification to test to the generated token, I'm getting a response that the message is sent, but I'm not able to receive it on the client side.

My index.html

<head>
  <script src="https://www.gstatic.com/firebasejs/4.4.0/firebase.js"></script>
  <link rel="manifest" href="./firebase.json">
</head>
 <script>
  if ('serviceWorker' in navigator) {
    navigator.serviceWorker.register('./firebase-messaging-sw.js').then(function(registration) {
      console.log('Firebase Worker Registered');

    }).catch(function(err) {
      console.log('Service Worker registration failed: ', err);
    });
  }
  </script>

I'm successfully able to register the service worker file

My App.component.ts

var config = {
            apiKey: "somekey",
            authDomain: "someproject-2.firebaseapp.com",
            databaseURL: "https://someproject-2.firebaseio.com",
            projectId: "someproject-2",
            storageBucket: "",
            messagingSenderId: "someid"
          };
          firebase.initializeApp(config);



        const messaging = firebase.messaging();

        messaging.requestPermission()
        .then(function() {
          console.log('Notification permission granted.');
          return messaging.getToken()
        })
        .then(function(result) {
            console.log("The token is: ", result);
        })
        .catch(function(err) {
          console.log('Unable to get permission to notify.', err);
        });

        messaging.onMessage(function(payload) {
        console.log("Message received. ", payload);
        });

I'm getting the permission dialog box asking permission and getting a token with this code

The curl code I used to send messages

curl -X POST -H "Authorization: key=somekey" -H "Content-Type: application/json" -d '{
  "notification": {
    "title": "Portugal vs. Denmark",
    "body": "5 to 1",
    "icon": "firebase-logo.png",
    "click_action": "http://localhost:8081"
  },
  "to": "sometoken"
}' "https://fcm.googleapis.com/fcm/send"

I'm able to successfully send notifications with this code

I can't figure out where I'm going wrong, maybe because it's on localhost? maybe the onMessage method is not running properly? Any help is highly appreciated!

回答1:

I had a similar issue and I went to cloud messaging on firebase and got my Server key and added that to the curl request.

curl --header  "Authorization: key=CloudMessagingServerKey" --header  "Content-Type: application/json" -d '{
     "notification": {
        "title": "FCM Message",
        "body": "This is an FCM Message",
      },
     "to": "token from messaging.getToken()"
     }' "https://fcm.googleapis.com/fcm/send"

and my firebase-messaging-sw.js looked like the code below

importScripts('https://www.gstatic.com/firebasejs/4.8.1/firebase-
 app.js');
importScripts('https://www.gstatic.com/firebasejs/4.8.1/firebase-
messaging.js');

firebase.initializeApp({
  apiKey: 'yourapikey',
  authDomain: 'xxxx.firebaseapp.com',
  databaseURL: 'https://xxxx.firebaseio.com',
  projectId: 'xxxx',
  storageBucket: 'xxxx.appspot.com',
  messagingSenderId: 'your message sender Id',
});

const messaging = firebase.messaging();

That did the trick for me. My errors were I was using a wrong serverKey and I did not use importScripts in my firebase-messaging-sw.js

回答2:

Alright, I didn't get any answers for this on stackoverflow, so I have to do it on my own and got it working!

The problem was in the service worker file, I have apparently not defined messaging variable.

If anybody is facing this issue, just make sure your service worker file looks something like this.

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': '182145913801'
  });

const messaging = firebase.messaging();