uptime-kuma/server/server.js

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console.log("Welcome to Uptime Kuma ")
console.log("Importing libraries")
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const express = require('express');
const http = require('http');
const { Server } = require("socket.io");
const dayjs = require("dayjs");
const {R} = require("redbean-node");
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const passwordHash = require('./password-hash');
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const jwt = require('jsonwebtoken');
const Monitor = require("./model/monitor");
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const fs = require("fs");
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const {getSettings} = require("./util-server");
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const {Notification} = require("./notification")
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const gracefulShutdown = require('http-graceful-shutdown');
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const Database = require("./database");
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const {sleep} = require("./util");
const args = require('args-parser')(process.argv);
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const version = require('../package.json').version;
const hostname = args.host || "0.0.0.0"
const port = args.port || 3001
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console.info("Version: " + version)
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console.log("Creating express and socket.io instance")
const app = express();
const server = http.createServer(app);
const io = new Server(server);
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app.use(express.json())
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/**
* Total WebSocket client connected to server currently, no actual use
* @type {number}
*/
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let totalClient = 0;
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/**
* Use for decode the auth object
* @type {null}
*/
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let jwtSecret = null;
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/**
* Main monitor list
* @type {{}}
*/
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let monitorList = {};
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/**
* Show Setup Page
* @type {boolean}
*/
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let needSetup = false;
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(async () => {
await initDatabase();
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console.log("Adding route")
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app.use('/', express.static("dist"));
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app.get('*', function(request, response, next) {
response.sendFile(process.cwd() + '/dist/index.html');
});
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console.log("Adding socket handler")
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io.on('connection', async (socket) => {
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socket.emit("info", {
version,
})
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totalClient++;
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if (needSetup) {
console.log("Redirect to setup page")
socket.emit("setup")
}
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socket.on('disconnect', () => {
totalClient--;
});
// Public API
socket.on("loginByToken", async (token, callback) => {
try {
let decoded = jwt.verify(token, jwtSecret);
console.log("Username from JWT: " + decoded.username)
let user = await R.findOne("user", " username = ? AND active = 1 ", [
decoded.username
])
if (user) {
await afterLogin(socket, user)
callback({
ok: true,
})
} else {
callback({
ok: false,
msg: "The user is inactive or deleted."
})
}
} catch (error) {
callback({
ok: false,
msg: "Invalid token."
})
}
});
socket.on("login", async (data, callback) => {
console.log("Login")
let user = await R.findOne("user", " username = ? AND active = 1 ", [
data.username
])
if (user && passwordHash.verify(data.password, user.password)) {
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// Upgrade the hash to bcrypt
if (passwordHash.needRehash(user.password)) {
await R.exec("UPDATE `user` SET password = ? WHERE id = ? ", [
passwordHash.generate(data.password),
user.id
]);
}
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await afterLogin(socket, user)
callback({
ok: true,
token: jwt.sign({
username: data.username
}, jwtSecret)
})
} else {
callback({
ok: false,
msg: "Incorrect username or password."
})
}
});
socket.on("logout", async (callback) => {
socket.leave(socket.userID)
socket.userID = null;
callback();
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});
socket.on("needSetup", async (callback) => {
callback(needSetup);
});
socket.on("setup", async (username, password, callback) => {
try {
if ((await R.count("user")) !== 0) {
throw new Error("Uptime Kuma has been setup. If you want to setup again, please delete the database.")
}
let user = R.dispense("user")
user.username = username;
user.password = passwordHash.generate(password)
await R.store(user)
needSetup = false;
callback({
ok: true,
msg: "Added Successfully."
});
} catch (e) {
callback({
ok: false,
msg: e.message
});
}
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});
// Auth Only API
socket.on("add", async (monitor, callback) => {
try {
checkLogin(socket)
let bean = R.dispense("monitor")
let notificationIDList = monitor.notificationIDList;
delete monitor.notificationIDList;
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bean.import(monitor)
bean.user_id = socket.userID
await R.store(bean)
await updateMonitorNotification(bean.id, notificationIDList)
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await startMonitor(socket.userID, bean.id);
await sendMonitorList(socket);
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callback({
ok: true,
msg: "Added Successfully.",
monitorID: bean.id
});
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} catch (e) {
callback({
ok: false,
msg: e.message
});
}
});
socket.on("editMonitor", async (monitor, callback) => {
try {
checkLogin(socket)
let bean = await R.findOne("monitor", " id = ? ", [ monitor.id ])
if (bean.user_id !== socket.userID) {
throw new Error("Permission denied.")
}
bean.name = monitor.name
bean.type = monitor.type
bean.url = monitor.url
bean.interval = monitor.interval
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bean.hostname = monitor.hostname;
bean.maxretries = monitor.maxretries;
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bean.port = monitor.port;
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bean.keyword = monitor.keyword;
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await R.store(bean)
await updateMonitorNotification(bean.id, monitor.notificationIDList)
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if (bean.active) {
await restartMonitor(socket.userID, bean.id)
}
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await sendMonitorList(socket);
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callback({
ok: true,
msg: "Saved.",
monitorID: bean.id
});
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} catch (e) {
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console.error(e)
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callback({
ok: false,
msg: e.message
});
}
});
socket.on("getMonitor", async (monitorID, callback) => {
try {
checkLogin(socket)
console.log(`Get Monitor: ${monitorID} User ID: ${socket.userID}`)
let bean = await R.findOne("monitor", " id = ? AND user_id = ? ", [
monitorID,
socket.userID,
])
callback({
ok: true,
monitor: await bean.toJSON(),
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});
} catch (e) {
callback({
ok: false,
msg: e.message
});
}
});
// Start or Resume the monitor
socket.on("resumeMonitor", async (monitorID, callback) => {
try {
checkLogin(socket)
await startMonitor(socket.userID, monitorID);
await sendMonitorList(socket);
callback({
ok: true,
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msg: "Resumed Successfully."
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});
} catch (e) {
callback({
ok: false,
msg: e.message
});
}
});
socket.on("pauseMonitor", async (monitorID, callback) => {
try {
checkLogin(socket)
await pauseMonitor(socket.userID, monitorID)
await sendMonitorList(socket);
callback({
ok: true,
msg: "Paused Successfully."
});
} catch (e) {
callback({
ok: false,
msg: e.message
});
}
});
socket.on("deleteMonitor", async (monitorID, callback) => {
try {
checkLogin(socket)
console.log(`Delete Monitor: ${monitorID} User ID: ${socket.userID}`)
if (monitorID in monitorList) {
monitorList[monitorID].stop();
delete monitorList[monitorID]
}
await R.exec("DELETE FROM monitor WHERE id = ? AND user_id = ? ", [
monitorID,
socket.userID
]);
callback({
ok: true,
msg: "Deleted Successfully."
});
await sendMonitorList(socket);
} catch (e) {
callback({
ok: false,
msg: e.message
});
}
});
socket.on("changePassword", async (password, callback) => {
try {
checkLogin(socket)
if (! password.currentPassword) {
throw new Error("Invalid new password")
}
let user = await R.findOne("user", " id = ? AND active = 1 ", [
socket.userID
])
if (user && passwordHash.verify(password.currentPassword, user.password)) {
await R.exec("UPDATE `user` SET password = ? WHERE id = ? ", [
passwordHash.generate(password.newPassword),
socket.userID
]);
callback({
ok: true,
msg: "Password has been updated successfully."
})
} else {
throw new Error("Incorrect current password")
}
} catch (e) {
callback({
ok: false,
msg: e.message
});
}
});
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socket.on("getSettings", async (type, callback) => {
try {
checkLogin(socket)
callback({
ok: true,
data: await getSettings(type),
});
} catch (e) {
callback({
ok: false,
msg: e.message
});
}
});
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// Add or Edit
socket.on("addNotification", async (notification, notificationID, callback) => {
try {
checkLogin(socket)
await Notification.save(notification, notificationID, socket.userID)
await sendNotificationList(socket)
callback({
ok: true,
msg: "Saved",
});
} catch (e) {
callback({
ok: false,
msg: e.message
});
}
});
socket.on("deleteNotification", async (notificationID, callback) => {
try {
checkLogin(socket)
await Notification.delete(notificationID, socket.userID)
await sendNotificationList(socket)
callback({
ok: true,
msg: "Deleted",
});
} catch (e) {
callback({
ok: false,
msg: e.message
});
}
});
socket.on("testNotification", async (notification, callback) => {
try {
checkLogin(socket)
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let msg = await Notification.send(notification, notification.name + " Testing")
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callback({
ok: true,
msg
});
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} catch (e) {
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console.error(e)
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callback({
ok: false,
msg: e.message
});
}
});
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socket.on("checkApprise", async (callback) => {
try {
checkLogin(socket)
callback(Notification.checkApprise());
} catch (e) {
callback(false);
}
});
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});
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console.log("Init")
server.listen(port, hostname, () => {
console.log(`Listening on ${hostname}:${port}`);
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startMonitors();
});
})();
async function updateMonitorNotification(monitorID, notificationIDList) {
R.exec("DELETE FROM monitor_notification WHERE monitor_id = ? ", [
monitorID
])
for (let notificationID in notificationIDList) {
if (notificationIDList[notificationID]) {
let relation = R.dispense("monitor_notification");
relation.monitor_id = monitorID;
relation.notification_id = notificationID;
await R.store(relation)
}
}
}
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async function checkOwner(userID, monitorID) {
let row = await R.getRow("SELECT id FROM monitor WHERE id = ? AND user_id = ? ", [
monitorID,
userID,
])
if (! row) {
throw new Error("You do not own this monitor.");
}
}
async function sendMonitorList(socket) {
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let list = await getMonitorJSONList(socket.userID);
io.to(socket.userID).emit("monitorList", list)
return list;
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}
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async function sendNotificationList(socket) {
let result = [];
let list = await R.find("notification", " user_id = ? ", [
socket.userID
]);
for (let bean of list) {
result.push(bean.export())
}
io.to(socket.userID).emit("notificationList", result)
return list;
}
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async function afterLogin(socket, user) {
socket.userID = user.id;
socket.join(user.id)
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let monitorList = await sendMonitorList(socket)
for (let monitorID in monitorList) {
await sendHeartbeatList(socket, monitorID);
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await sendImportantHeartbeatList(socket, monitorID);
await Monitor.sendStats(io, monitorID, user.id)
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}
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await sendNotificationList(socket)
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}
async function getMonitorJSONList(userID) {
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let result = {};
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let monitorList = await R.find("monitor", " user_id = ? ", [
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userID
])
for (let monitor of monitorList) {
result[monitor.id] = await monitor.toJSON();
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}
return result;
}
function checkLogin(socket) {
if (! socket.userID) {
throw new Error("You are not logged in.");
}
}
async function initDatabase() {
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if (! fs.existsSync(Database.path)) {
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console.log("Copying Database")
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fs.copyFileSync(Database.templatePath, Database.path);
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}
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console.log("Connecting to Database")
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R.setup('sqlite', {
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filename: Database.path
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});
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console.log("Connected")
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// Patch the database
await Database.patch()
// Auto map the model to a bean object
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R.freeze(true)
await R.autoloadModels("./server/model");
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let jwtSecretBean = await R.findOne("setting", " `key` = ? ", [
"jwtSecret"
]);
if (! jwtSecretBean) {
console.log("JWT secret is not found, generate one.")
jwtSecretBean = R.dispense("setting")
jwtSecretBean.key = "jwtSecret"
jwtSecretBean.value = passwordHash.generate(dayjs() + "")
await R.store(jwtSecretBean)
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console.log("Stored JWT secret into database")
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} else {
console.log("Load JWT secret from database.")
}
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// If there is no record in user table, it is a new Uptime Kuma instance, need to setup
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if ((await R.count("user")) === 0) {
console.log("No user, need setup")
needSetup = true;
}
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jwtSecret = jwtSecretBean.value;
}
async function startMonitor(userID, monitorID) {
await checkOwner(userID, monitorID)
console.log(`Resume Monitor: ${monitorID} User ID: ${userID}`)
await R.exec("UPDATE monitor SET active = 1 WHERE id = ? AND user_id = ? ", [
monitorID,
userID
]);
let monitor = await R.findOne("monitor", " id = ? ", [
monitorID
])
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if (monitor.id in monitorList) {
monitorList[monitor.id].stop();
}
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monitorList[monitor.id] = monitor;
monitor.start(io)
}
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async function restartMonitor(userID, monitorID) {
return await startMonitor(userID, monitorID)
}
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async function pauseMonitor(userID, monitorID) {
await checkOwner(userID, monitorID)
console.log(`Pause Monitor: ${monitorID} User ID: ${userID}`)
await R.exec("UPDATE monitor SET active = 0 WHERE id = ? AND user_id = ? ", [
monitorID,
userID
]);
if (monitorID in monitorList) {
monitorList[monitorID].stop();
}
}
/**
* Resume active monitors
*/
async function startMonitors() {
let list = await R.find("monitor", " active = 1 ")
for (let monitor of list) {
monitor.start(io)
monitorList[monitor.id] = monitor;
}
}
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/**
* Send Heartbeat History list to socket
*/
async function sendHeartbeatList(socket, monitorID) {
let list = await R.find("heartbeat", `
monitor_id = ?
ORDER BY time DESC
LIMIT 100
`, [
monitorID
])
let result = [];
for (let bean of list) {
result.unshift(bean.toJSON())
}
socket.emit("heartbeatList", monitorID, result)
}
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async function sendImportantHeartbeatList(socket, monitorID) {
let list = await R.find("heartbeat", `
monitor_id = ?
AND important = 1
ORDER BY time DESC
LIMIT 500
`, [
monitorID
])
socket.emit("importantHeartbeatList", monitorID, list)
}
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const startGracefulShutdown = async () => {
console.log('Shutdown requested');
await (new Promise((resolve) => {
server.close(async function () {
console.log('Stopped Express.');
process.exit(0)
setTimeout(async () =>{
await R.close();
console.log("Stopped DB")
resolve();
}, 5000)
});
}));
}
async function shutdownFunction(signal) {
console.log('Called signal: ' + signal);
console.log("Stopping all monitors")
for (let id in monitorList) {
let monitor = monitorList[id]
monitor.stop()
}
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await sleep(2000);
await Database.close();
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}
function finalFunction() {
console.log('Graceful Shutdown')
}
gracefulShutdown(server, {
signals: 'SIGINT SIGTERM',
timeout: 30000, // timeout: 30 secs
development: false, // not in dev mode
forceExit: true, // triggers process.exit() at the end of shutdown process
onShutdown: shutdownFunction, // shutdown function (async) - e.g. for cleanup DB, ...
finally: finalFunction // finally function (sync) - e.g. for logging
});