我们如何将 FCM Service Worker 与现有的 Service Worker 一起使用?

How can we use FCM Service Worker with a existing Service Worker?

我们正在创建一个 PWA 网络应用程序,目前我们正在使用 sw-precache 库来生成服务工作者文件,它按预期工作。现在我们已经添加了 FCM service worker 用于在离线时侦听传入消息,但它正在覆盖我们现有的 service worker。

那么我们如何将 firebase service worker 与使用 sw-precache 生成的现有 service worker 集成?

我尝试了几种方法,当前代码:

if ('serviceWorker' in navigator) {
    navigator.serviceWorker.register('/service-worker.js').then((registration) => {
        console.log('Service Worker registered');
    }).catch(function (err) {
        console.log('Service Worker registration failed: ', err);
    });

    navigator.serviceWorker.register('/firebase-messaging-sw.js', { scope: '/firebase-cloud-messaging-push-scope' }).then(function (registration) {
         console.log('f Service Worker registered');
     }).catch(function (err) {
         console.log('f Service Worker registration failed: ', err);
     });
}

更新 1: 我也试过 useServiceWorker(registration),它注册了主要的服务人员,但是当我在我的服务中初始化 firebase 时,它​​期望 firebase-messaging-sw.js 加载所以它在控制台中抛出一些错误。

服务代码:

import * as firebase from 'firebase';
import { isPlatformBrowser } from '@angular/common';

@Injectable()
export class MessagingService {   
  messaging;

  constructor(
    @Inject(PLATFORM_ID) private _platformId: Object, ) {
    if (isPlatformBrowser(this._platformId)) {
      var config = {
        messagingSenderId: "XXXXXXXX"
      };

      firebase.initializeApp(config);
      this.messaging = firebase.messaging();
    }
  }

  //  ......

}

控制台错误:

也尝试了以下答案,但没有成功:


更新 2: 最后添加 useServiceWorker(registration) 和一个空的 firebase-messaging-sw.js 文件,两个服务工作人员都在注册,但缓存不起作用。

为了完全控制sw.js和推送通知useServiceWorker非常有用。

查看此文档useServiceWorker(registration)

   /------index.html------/
    var config = {
        apiKey: "xxxxxxxxxxxx",
        authDomain: "xxxxxxxxxxxx",
        databaseURL: "xxxxxxxxxxxx",
        projectId: "xxxxxxxxxxxx",
        storageBucket: "xxxxxxxxxxxx",
        messagingSenderId: "xxxxxxxxxxxx"
    };
    firebase.initializeApp(config);
    var messaging = firebase.messaging();

navigator.serviceWorker.register('service-worker.js')
.then((registration) => {
  messaging.useServiceWorker(registration);


});

在app.module.ts中或者您可以将以构造函数(sw...)

import * as firebase from 'firebase';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    ServiceWorkerModule.register('/ngsw-worker.js', {enabled: environment.production}),
    AppRoutingModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule {
  constructor(swPush: SwPush) {
    if (swPush.isEnabled) {
      navigator.serviceWorker
        .ready
        .then((registration) => firebase.messaging().useServiceWorker(registration));
    }
  }
}

在 angular-cli.json 中确保你有 firebase-messaging-sw.js

{
  "apps": [
    {
      "root": "src",
      "outDir": "dist",
      "assets": [
        "assets",
        "favicon.ico",
        "manifest.json",
        "firebase-messaging-sw.js"
      ],
      "index": "index.html",
      "main": "main.ts",
      "environmentSource": "environments/environment.ts",
      "environments": {
        "dev": "environments/environment.ts",
        "prod": "environments/environment.prod.ts"
      },
      "serviceWorker": true
    }
  ]
}