fcm-node/lib/topic_request.js

A Node.JS simple interface to Google's Firebase Cloud Messaging (FCM). Supports both android and iOS, including topic messages, and parallel calls. Aditionally it also keeps the callback behavior for the new firebase messaging service.

var https = require('https');

function TopicRequest(options, data, CB){
    const payload = JSON.stringify(data);
    const request = https.request(options, (res) => {
        "use strict";
        let body = '';

        if(res.statusCode !== 200){
            CB({
                statusCode: res.statusCode,
                message: res.statusMessage
            }, null);
        }else{
            res.on('data', function(chunk){
                body += chunk;
            });

            res.on('end', function(){
                CB(null, JSON.parse(body))
            });
        }
    }).on('error', (e) => {
         CB(JSON.parse(e), null);
    }).end(payload);
}

module.exports = TopicRequest;