node.js - firebase-admin:获取失败通知传递结果的 token

Question

假设我们要向两个注册 token (仅限 Android 设备，无 iOS)发送通知，如下所示:

const tokens = ['tokenA', 'tokenB'];

const payload = {badge: 1, title: 'Hello', body: 'world'};
const options = {priority: 'high',contentAvailable: false, timeToLive: 60 * 60 * 24};

const admin = FirebaseAdmin.initializeApp({/*config here...*/});

admin.messaging().sendToDevice(deviceTokens, payload, options)
  .then((response) => {

    response.results.forEach((deviceResult) => {
      if (deviceResult.error) {
        console.log('Delivery failed. Showing result:\n', deviceResult);
      }
    });

});

设备曾经注册过 tokenB 的用户已从其设备中删除了该应用。因此，该 token 不再在 firebase 中注册。错误对象如下所示:

传送失败。显示结果:

{"error":
  {
    "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."
  }
}

问题:我的问题是，我只知道其中一次交付失败了。但我不知道错误与哪个 token 相关。因此我无法从数据库中删除过时的 token 。

问题:有没有办法找出哪些代币交付失败？

Github问题链接:https://github.com/firebase/firebase-admin-node/issues/600

Answer 1

您需要使用 forEach 中的索引，并从您在 sendToDevice 中传递的数组中获取 token 。

官方文档:https://firebase.google.com/docs/reference/admin/node/admin.messaging.MessagingDevicesResponse

这看起来像是一种黑客攻击，但当我拥有单个用户的多个设备 token 时，它对我有用，因为每当他们登录时我都必须存储新的设备 token 。

const tokens = ['tokenA', 'tokenB'];

const payload = {badge: 1, title: 'Hello', body: 'world'};
const options = {priority: 'high',contentAvailable: false, timeToLive: 60 * 60 * 24};

const admin = FirebaseAdmin.initializeApp({/*config here...*/});

admin.messaging().sendToDevice(deviceTokens, payload, options)
  .then((response) => {

    response.results.forEach((deviceResult,index) => {
      if (deviceResult.error) {
        let failedToken = tokens[index];
        // Now use this token to delete it from your DB, or mark it failed according to your requirements.
      }
    });

});

此方法也用于 firbease sample :https://github.com/firebase/functions-samples/blob/master/fcm-notifications/functions/index.js