如何在ServiceWorker中的推送事件中获取注册ID？

Question

订阅时我有注册ID,但是当我收到推送通知时,我无法弄清楚如何在服务工作文件中获取它？

client.js

pushManager.subscribe({ userVisibleOnly: true }).then(({ endpoint }) => {
  const registrationId = endpoint.split('https://android.googleapis.com/gcm/send/')[1];
  // How do I get this registrationId in service-worker.js below?  
});

服务worker.js

self.addEventListener('push', event => {
  // I'd like to make a request to server to get the notification data, but I need the registrationId for that. How do I get registration id here?
});

Answer 1

在里面ServiceWorkerGlobalScope,你可以得到有效的ServiceWorkerRegistration,它反过来暴露PushManager,然后给你一个getSubscription()方法,它返回一个Promise解决当前订阅.

有很多层要遵循,但实际的代码非常简单:

self.registration.pushManager.getSubscription().then(subscription => {
  // Do something with subscription.endpoint
});