firebase.js
Rama master · réplica de lectura del repositorio original.
/**
* @description MeshCentral Firebase communication module
* @author Ylian Saint-Hilaire
* @license Apache-2.0
* @version v0.0.1
*/
/*xjslint node: true */
/*xjslint plusplus: true */
/*xjslint maxlen: 256 */
/*jshint node: true */
/*jshint strict: false */
/*jshint esversion: 6 */
"use strict";
// Initialize the Firebase Admin SDK
module.exports.CreateFirebase = function (parent, serviceAccount) {
// Import the Firebase Admin SDK
const admin = require('firebase-admin');
const obj = {};
obj.messageId = 0;
obj.relays = {};
obj.stats = {
mode: 'Real',
sent: 0,
sendError: 0,
received: 0,
receivedNoRoute: 0,
receivedBadArgs: 0
};
const tokenToNodeMap = {}; // Token --> { nid: nodeid, mid: meshid }
// Initialize Firebase Admin with server key and project ID
if (!admin.apps.length) {
admin.initializeApp({ credential: admin.credential.cert(serviceAccount) });
}
// Setup logging
if (parent.config.firebase && (parent.config.firebase.log === true)) {
obj.logpath = parent.path.join(parent.datapath, 'firebase.txt');
obj.log = function (msg) { try { parent.fs.appendFileSync(obj.logpath, new Date().toLocaleString() + ': ' + msg + '\r\n'); } catch (ex) { console.log('ERROR: Unable to write to firebase.txt.'); } }
} else {
obj.log = function () { }
}
// Function to send notifications
obj.sendToDevice = function (node, payload, options, func) {
if (typeof node === 'string') {
parent.db.Get(node, function (err, docs) {
if (!err && docs && docs.length === 1) {
obj.sendToDeviceEx(docs[0], payload, options, func);
} else {
func(0, 'error');
}
});
} else {
obj.sendToDeviceEx(node, payload, options, func);
}
};
// Send an outbound push notification
obj.sendToDeviceEx = function (node, payload, options, func) {
if (!node || typeof node.pmt !== 'string') {
func(0, 'error');
return;
}
obj.log('sendToDevice, node:' + node._id + ', payload: ' + JSON.stringify(payload) + ', options: ' + JSON.stringify(options));
// Fill in our lookup table
if (node._id) {
tokenToNodeMap[node.pmt] = {
nid: node._id,
mid: node.meshid,
did: node.domain
};
}
const message = {
token: node.pmt,
notification: payload.notification,
data: payload.data,
android: {
priority: options.priority || 'high',
ttl: options.timeToLive ? options.timeToLive * 1000 : undefined
}
};
admin.messaging().send(message).then(function (response) {
obj.stats.sent++;
obj.log('Success');
func(response);
}).catch(function (error) {
obj.stats.sendError++;
obj.log('Fail: ' + error);
func(0, error);
});
};
// Setup a two way relay
obj.setupRelay = function (ws) {
ws.relayId = getRandomPassword();
while (obj.relays[ws.relayId]) { ws.relayId = getRandomPassword(); }
obj.relays[ws.relayId] = ws;
ws.on('message', function (msg) {
parent.debug('email', 'FBWS-Data(' + this.relayId + '): ' + msg);
if (typeof msg === 'string') {
obj.log('Relay: ' + msg);
let data;
try { data = JSON.parse(msg); } catch (ex) { return; }
if (typeof data !== 'object') return;
if (!parent.common.validateObjectForMongo(data, 4096)) return;
if (typeof data.pmt !== 'string' || typeof data.payload !== 'object') return;
data.payload.data = data.payload.data || {};
data.payload.data.r = ws.relayId;
obj.sendToDevice({ pmt: data.pmt }, data.payload, data.options, function (id, err) {
if (!err) {
try { ws.send(JSON.stringify({ sent: true })); } catch (ex) { }
} else {
try { ws.send(JSON.stringify({ sent: false })); } catch (ex) { }
}
});
}
});
// If error, close the relay
ws.on('error', function (err) {
parent.debug('email', 'FBWS-Error(' + this.relayId + '): ' + err);
delete obj.relays[this.relayId];
});
// Close the relay
ws.on('close', function () {
parent.debug('email', 'FBWS-Close(' + this.relayId + ')');
delete obj.relays[this.relayId];
});
};
function getRandomPassword() {
return Buffer.from(parent.crypto.randomBytes(9), 'binary').toString('base64').replace(/\//g, '@');
}
return obj;
};
// Construct the Firebase object
module.exports.CreateFirebaseRelay = function (parent, url, key) {
var obj = {};
obj.messageId = 0;
obj.stats = {
mode: "Relay",
sent: 0,
sendError: 0,
received: 0,
receivedNoRoute: 0,
receivedBadArgs: 0
}
const WebSocket = require('ws');
const https = require('https');
const querystring = require('querystring');
const relayUrl = new URL(url);
parent.debug('email', 'CreateFirebaseRelay-Setup');
// Setup logging
if (parent.config.firebaserelay && (parent.config.firebaserelay.log === true)) {
obj.logpath = parent.path.join(parent.datapath, 'firebaserelay.txt');
obj.log = function (msg) { try { parent.fs.appendFileSync(obj.logpath, new Date().toLocaleString() + ': ' + msg + '\r\n'); } catch (ex) { console.log('ERROR: Unable to write to firebaserelay.txt.'); } }
} else {
obj.log = function () { }
}
obj.log('Starting relay to: ' + relayUrl.href);
if (relayUrl.protocol == 'wss:') {
// Setup two-way push notification channel
obj.wsopen = false;
obj.tokenToNodeMap = {}; // Token --> { nid: nodeid, mid: meshid }
obj.backoffTimer = 0;
obj.connectWebSocket = function () {
if (obj.reconnectTimer != null) { try { clearTimeout(obj.reconnectTimer); } catch (ex) { } delete obj.reconnectTimer; }
if (obj.wsclient != null) return;
obj.wsclient = new WebSocket(relayUrl.href + (key ? ('?key=' + key) : ''), { rejectUnauthorized: false })
obj.wsclient.on('open', function () {
obj.lastConnect = Date.now();
parent.debug('email', 'FBWS-Connected');
obj.wsopen = true;
});
obj.wsclient.on('message', function (msg) {
parent.debug('email', 'FBWS-Data(' + msg.length + '): ' + msg);
obj.log('Received(' + msg.length + '): ' + msg);
var data = null;
try { data = JSON.parse(msg) } catch (ex) { }
if (typeof data != 'object') return;
if (typeof data.from != 'string') return;
if (typeof data.data != 'object') return;
if (typeof data.category != 'string') return;
processMessage(data.messageId, data.from, data.data, data.category);
});
obj.wsclient.on('error', function (err) { obj.log('Error: ' + err); });
obj.wsclient.on('close', function (a, b, c) {
parent.debug('email', 'FBWS-Disconnected');
obj.wsclient = null;
obj.wsopen = false;
// Compute the backoff timer
if (obj.reconnectTimer == null) {
if ((obj.lastConnect != null) && ((Date.now() - obj.lastConnect) > 10000)) { obj.backoffTimer = 0; }
obj.backoffTimer += 1000;
obj.backoffTimer = obj.backoffTimer * 2;
if (obj.backoffTimer > 1200000) { obj.backoffTimer = 600000; } // Maximum 10 minutes backoff.
obj.reconnectTimer = setTimeout(obj.connectWebSocket, obj.backoffTimer);
}
});
}
function processMessage(messageId, from, data, category) {
// Lookup node information from the cache
var ninfo = obj.tokenToNodeMap[from];
if (ninfo == null) { obj.stats.receivedNoRoute++; return; }
if ((data != null) && (data.con != null) && (data.s != null)) { // Console command
obj.stats.received++;
parent.webserver.routeAgentCommand({ action: 'msg', type: 'console', value: data.con, sessionid: data.s }, ninfo.did, ninfo.nid, ninfo.mid);
} else {
obj.stats.receivedBadArgs++;
}
}
obj.sendToDevice = function (node, payload, options, func) {
if (typeof node == 'string') {
parent.db.Get(node, function (err, docs) { if ((err == null) && (docs != null) && (docs.length == 1)) { obj.sendToDeviceEx(docs[0], payload, options, func); } else { func(0, 'error'); } })
} else {
obj.sendToDeviceEx(node, payload, options, func);
}
}
obj.sendToDeviceEx = function (node, payload, options, func) {
parent.debug('email', 'Firebase-sendToDevice-webSocket');
if ((node == null) || (typeof node.pmt != 'string')) { func(0, 'error'); return; }
obj.log('sendToDevice, node:' + node._id + ', payload: ' + JSON.stringify(payload) + ', options: ' + JSON.stringify(options));
// Fill in our lookup table
if (node._id != null) { obj.tokenToNodeMap[node.pmt] = { nid: node._id, mid: node.meshid, did: node.domain } }
// Fill in the server agent cert hash
if (payload.data == null) { payload.data = {}; }
if (payload.data.shash == null) { payload.data.shash = parent.webserver.agentCertificateHashBase64; } // Add the server agent hash, new Android agents will reject notifications that don't have this.
// If the web socket is open, send now
if (obj.wsopen == true) {
try { obj.wsclient.send(JSON.stringify({ pmt: node.pmt, payload: payload, options: options })); } catch (ex) { func(0, 'error'); obj.stats.sendError++; return; }
obj.stats.sent++;
obj.log('Sent');
func(1);
} else {
// TODO: Buffer the push messages until TTL.
obj.stats.sendError++;
obj.log('Error');
func(0, 'error');
}
}
obj.connectWebSocket();
} else if (relayUrl.protocol == 'https:') {
// Send an outbound push notification using an HTTPS POST
obj.pushOnly = true;
obj.sendToDevice = function (node, payload, options, func) {
if (typeof node == 'string') {
parent.db.Get(node, function (err, docs) { if ((err == null) && (docs != null) && (docs.length == 1)) { obj.sendToDeviceEx(docs[0], payload, options, func); } else { func(0, 'error'); } })
} else {
obj.sendToDeviceEx(node, payload, options, func);
}
}
obj.sendToDeviceEx = function (node, payload, options, func) {
parent.debug('email', 'Firebase-sendToDevice-httpPost');
if ((node == null) || (typeof node.pmt != 'string')) return;
// Fill in the server agent cert hash
if (payload.data == null) { payload.data = {}; }
if (payload.data.shash == null) { payload.data.shash = parent.webserver.agentCertificateHashBase64; } // Add the server agent hash, new Android agents will reject notifications that don't have this.
obj.log('sendToDevice, node:' + node._id + ', payload: ' + JSON.stringify(payload) + ', options: ' + JSON.stringify(options));
const querydata = querystring.stringify({ 'msg': JSON.stringify({ pmt: node.pmt, payload: payload, options: options }) });
// Send the message to the relay
const httpOptions = {
hostname: relayUrl.hostname,
port: relayUrl.port ? relayUrl.port : 443,
path: relayUrl.pathname + (key ? ('?key=' + key) : ''),
method: 'POST',
//rejectUnauthorized: false, // DEBUG
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'Content-Length': querydata.length
}
}
const req = https.request(httpOptions, function (res) {
obj.log('Response: ' + res.statusCode);
if (res.statusCode == 200) { obj.stats.sent++; } else { obj.stats.sendError++; }
if (func != null) { func(++obj.messageId, (res.statusCode == 200) ? null : 'error'); }
});
parent.debug('email', 'Firebase-sending');
req.on('error', function (error) { obj.stats.sent++; func(++obj.messageId, 'error'); });
req.write(querydata);
req.end();
}
}
return obj;
};