如何在 Node js 中使用 FCM 向多个 android 设备发送消息？

Question

我尝试将消息发送到单个设备，即发送到单个注册 ID，它工作正常，但当尝试添加多个注册 ID 时，出现 'InvalidServerResponse' 错误。例如适用于 regTokens = 'regId1'; 但不适用于 regTokens = ['regId1','regId2'];

var FCM = require('fcm-node');
// Add API Key
var fcm = new FCM('<server-key>');

exports.sendMessage = function (regTokens, messageToSend, callback) {
  var message = { //this may vary according to the message type (single recipient, multicast, topic, et cetera)
      to: regTokens,

      data: { 
        ar_message: messageToSend
      }
  };

    fcm.send(message, function(err, response){
        if (err) {
            console.log("Something has gone wrong!",err);
        } else {
            console.log("Successfully sent with response: ", response);
        }
        callback(err, 'Success');
      });
}

Answer 1

更新：对于v1，似乎不再支持registration_ids。强烈建议改用主题。

发送到指定的多个注册令牌时，必须使用registration_ids而不是to。来自文档（强调我的）：

This parameter specifies the recipient of a multicast message, a message sent to more than one registration token.

The value should be an array of registration tokens to which to send the multicast message. The array must contain at least 1 and at most 1000 registration tokens. To send a message to a single device, use the to parameter.

Multicast messages are only allowed using the HTTP JSON format.

var message = {
    registration_ids: regTokens,

   data: { 
        ar_message: messageToSend
   }
  };

Answer 2

此线程的更新：使用 admin.messaging.Messaging.sendToDevice() 将消息发送到多个 android 设备。

https://firebase.google.com/docs/reference/admin/node/admin.messaging.Messaging#sendToDevice

messaging.sendToDevice(registrationTokens, payload, options)

registrationTokens: Array of String (Tokens of the recipients)

payload: Message payload

options: (Optional) admin.messaging.MessagingOptions

Answer 3

var message = {
            // to : "token", //for single device
            registration_ids: ["token1", "token2"], // for Multiple device
            collapse_key: 'your_collapse_key',
            notification: notify,
            data: payload,
         };

Answer 4

var fetch = require('node-fetch');

send_fcm_notifications()
function send_fcm_notifications(){ 

// notification object with title and text

var notification = {
  'title': 'Best Deals',
  'text': 'Mobile Devices at 50% off. Only for today'
};

// fcm device tokens array

var fcm_tokens = ["Key 1", "Key 2"]

var notification_body = {
    'notification': notification,
          'registration_ids': fcm_tokens
  }


fetch('https://fcm.googleapis.com/fcm/send', {

        'method': 'POST',

        'headers': {
          // replace authorization key with your key
          'Authorization': 'key=' + 'Authorization Key',
          'Content-Type': 'application/json'
        },

         'body': JSON.stringify(notification_body)
      })
      .then(function(response) {
        console.log(response);
      })
      .catch(function(error) 
        console.error(error);
      })
}

如何在 Node js 中使用 FCM 向多个 android 设备发送消息？

How to send message to multiple android devices using FCM in Node js?

push-notification

node.js

google-cloud-messaging

firebase-cloud-messaging