Question

FCM令牌什么时候到期？是6个月吗？

Answer 1

它不会过期。如果发生下列情况之一，它会自动更新。

- 该应用删除实例ID
- 应用程序在新设备上恢复
- 用户卸载/重新安装应用
- 用户清除应用数据。

监控令牌生成

每当生成新令牌时，onTokenRefreshcallback都会触发，所以   在其上下文中调用getToken可确保您访问   当前可用的注册令牌。确保你已经添加了   服务到您的清单，然后在上下文中调用getToken   onTokenRefresh，并记录如下所示的值：

@Override
public void onTokenRefresh() {
    // Get updated InstanceID token.
    String refreshedToken = FirebaseInstanceId.getInstance().getToken();
    Log.d(TAG, "Refreshed token: " + refreshedToken);

    // If you want to send messages to this application instance or
    // manage this apps subscriptions on the server side, send the
    // Instance ID token to your app server.
    sendRegistrationToServer(refreshedToken);
}

Answer 2

如文档here中所述，令牌不会过期，仅在某些事件上会更改。每当生成新令牌时，都会调用onTokenRefereshId方法。要实现此目的，请创建一个扩展FirebaseInstanceIdService并覆盖onRefreshToken的类，如下所示：

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {
    @Override
    public void onTokenRefresh() {
        // Get updated InstanceID token.
        String refreshedToken = FirebaseInstanceId.getInstance().getToken();
        Log.d(TAG, "Refreshed token: " + refreshedToken);

        // If you want to send messages to this application instance or
        // manage this apps subscriptions on the server side, send the
        // Instance ID token to your app server.
        sendRegistrationToServer(refreshedToken);
    }
}

也不要忘记在清单中注册此服务

<service
    android:name=".MyFirebaseInstanceIDService">
    <intent-filter>
        <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
    </intent-filter>
</service>

Answer 3

使用 firebase admin，您可以执行以下操作：

async function isValidDeviceToken (deviceToken) {
  const {
    results: [notifResult]
  } = await firebaseAdmin.messaging().sendToDevice(
    deviceToken,
    {
      notification: {
        title: 'Device Registration',
        message: 'Your device has been registered.'
      }
    },
    {
      dryRun: true
    }
  );

  // returns true if valid, false if not.
  return !notifResult.error;
}

它的作用是检查提供的 deviceToken 是否有效，隐藏在场景中，firebase 管理员检查 deviceToken 是否已注册。如果没有注册，会返回如下错误：

{
  error: FirebaseMessagingError: The provided registration token is not registered. A previously valid registration token can be unregistered for a variety of reasons. See the error documentation for more details. Remove this registration token and stop using it to send messages.
      at FirebaseMessagingError.FirebaseError [as constructor] (/Users/aprilmintacpineda/projects/my-app/node_modules/firebase-admin/lib/utils/error.js:44:28)
      at FirebaseMessagingError.PrefixedFirebaseError [as constructor] (/Users/aprilmintacpineda/projects/my-app/node_modules/firebase-admin/lib/utils/error.js:90:28)
      at new FirebaseMessagingError (/Users/aprilmintacpineda/projects/my-app/node_modules/firebase-admin/lib/utils/error.js:256:16)
      at Function.FirebaseMessagingError.fromServerError (/Users/aprilmintacpineda/projects/my-app/node_modules/firebase-admin/lib/utils/error.js:289:16)
      at /Users/aprilmintacpineda/projects/my-app/node_modules/firebase-admin/lib/messaging/messaging.js:105:63
      at Array.forEach (<anonymous>)
      at mapRawResponseToDevicesResponse (/Users/aprilmintacpineda/projects/my-app/node_modules/firebase-admin/lib/messaging/messaging.js:101:26)
      at /Users/aprilmintacpineda/projects/my-app/node_modules/firebase-admin/lib/messaging/messaging.js:370:24
      at processTicksAndRejections (node:internal/process/task_queues:94:5)
      at async isValidDeviceToken (/Users/aprilmintacpineda/projects/my-app/test.js:13:7) {
    errorInfo: {
      code: 'messaging/registration-token-not-registered',
      message: 'The provided registration token is not registered. A previously valid registration token can be unregistered for a variety of reasons. See the error documentation for more details. Remove this registration token and stop using it to send messages.'
    },
    codePrefix: 'messaging'
  }
}

FCM令牌何时到期？

3 个答案: