使用firebase-admin发送主题通知

Question

我需要在fcm中通过主题实现广播通知。我正在使用firebase-admin发送这些文件。任何人都可以发布通过node.js发送这些通知的代码片段吗？

Answer 1

首先，您需要为用户订阅给定的主题

// These registration tokens come from the client FCM SDKs.
var registrationTokens = [
   'YOUR_REGISTRATION_TOKEN_1',
  // ...
   'YOUR_REGISTRATION_TOKEN_n'
];

// Subscribe the devices corresponding to the registration tokens to the
// topic.
admin.messaging().subscribeToTopic(registrationTokens, topic)
  .then(function(response) {
    // See the MessagingTopicManagementResponse reference documentation
    // for the contents of response.
    console.log('Successfully subscribed to topic:', response);
  })
  .catch(function(error) {
    console.log('Error subscribing to topic:', error);
  });

，然后您可以使用广播通知

// The topic name can be optionally prefixed with "/topics/".
var topic = 'highScores';

var message = {
  data: {
    score: '850',
    time: '2:45'
  },
  topic: topic
};

// Send a message to devices subscribed to the provided topic.
admin.messaging().send(message)
  .then((response) => {
    // Response is a message ID string.
    console.log('Successfully sent message:', response);
  })
  .catch((error) => {
    console.log('Error sending message:', error);
  });

你可以阅读更多关于它的here

Answer 2

您将需要Firebase项目设备注册令牌firebase云函数

firebase通知的工作原理:设备到设备通知:从设备1 -firebase数据库(函数在写入数据库时触发)-firebase云函数(云函数将向dev 2发送通知)- device2

Answer 3

    const topic = "test";
    const payload = {
      notification: {
        title: "New news",
        body: "2:45",
      },
    };
    admin
      .messaging()
      .sendToTopic(topic, payload)
      .then((response2) => {
        // Response2 is a message ID string.
        console.log("Successfully sent message:", response2);
      })
      .catch((error) => {
        console.log("Error sending message:", error);
      });