uptime-kuma/server/uptime-kuma-server.js

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const express = require("express");
const https = require("https");
const fs = require("fs");
const http = require("http");
const { Server } = require("socket.io");
const { R } = require("redbean-node");
const { log } = require("../src/util");
const Database = require("./database");
const util = require("util");
const { CacheableDnsHttpAgent } = require("./cacheable-dns-http-agent");
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const { Settings } = require("./settings");
/**
* `module.exports` (alias: `server`) should be inside this class, in order to avoid circular dependency issue.
* @type {UptimeKumaServer}
*/
class UptimeKumaServer {
/**
*
* @type {UptimeKumaServer}
*/
static instance = null;
/**
* Main monitor list
* @type {{}}
*/
monitorList = {};
entryPage = "dashboard";
app = undefined;
httpServer = undefined;
io = undefined;
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/**
* Cache Index HTML
* @type {string}
*/
indexHTML = "";
static getInstance(args) {
if (UptimeKumaServer.instance == null) {
UptimeKumaServer.instance = new UptimeKumaServer(args);
}
return UptimeKumaServer.instance;
}
constructor(args) {
// SSL
const sslKey = args["ssl-key"] || process.env.UPTIME_KUMA_SSL_KEY || process.env.SSL_KEY || undefined;
const sslCert = args["ssl-cert"] || process.env.UPTIME_KUMA_SSL_CERT || process.env.SSL_CERT || undefined;
log.info("server", "Creating express and socket.io instance");
this.app = express();
if (sslKey && sslCert) {
log.info("server", "Server Type: HTTPS");
this.httpServer = https.createServer({
key: fs.readFileSync(sslKey),
cert: fs.readFileSync(sslCert)
}, this.app);
} else {
log.info("server", "Server Type: HTTP");
this.httpServer = http.createServer(this.app);
}
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try {
this.indexHTML = fs.readFileSync("./dist/index.html").toString();
} catch (e) {
// "dist/index.html" is not necessary for development
if (process.env.NODE_ENV !== "development") {
log.error("server", "Error: Cannot find 'dist/index.html', did you install correctly?");
process.exit(1);
}
}
CacheableDnsHttpAgent.registerGlobalAgent();
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this.io = new Server(this.httpServer);
}
async sendMonitorList(socket) {
let list = await this.getMonitorJSONList(socket.userID);
this.io.to(socket.userID).emit("monitorList", list);
return list;
}
/**
* Get a list of monitors for the given user.
* @param {string} userID - The ID of the user to get monitors for.
* @returns {Promise<Object>} A promise that resolves to an object with monitor IDs as keys and monitor objects as values.
*
* Generated by Trelent
*/
async getMonitorJSONList(userID) {
let result = {};
let monitorList = await R.find("monitor", " user_id = ? ORDER BY weight DESC, name", [
userID,
]);
for (let monitor of monitorList) {
result[monitor.id] = await monitor.toJSON();
}
return result;
}
/**
* Write error to log file
* @param {any} error The error to write
* @param {boolean} outputToConsole Should the error also be output to console?
*/
static errorLog(error, outputToConsole = true) {
const errorLogStream = fs.createWriteStream(Database.dataDir + "/error.log", {
flags: "a"
});
errorLogStream.on("error", () => {
log.info("", "Cannot write to error.log");
});
if (errorLogStream) {
const dateTime = R.isoDateTime();
errorLogStream.write(`[${dateTime}] ` + util.format(error) + "\n");
if (outputToConsole) {
console.error(error);
}
}
errorLogStream.end();
}
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async getClientIP(socket) {
const clientIP = socket.client.conn.remoteAddress.replace(/^.*:/, "");
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if (await Settings.get("trustProxy")) {
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return socket.client.conn.request.headers["x-forwarded-for"]
|| socket.client.conn.request.headers["x-real-ip"]
|| clientIP;
} else {
return clientIP;
}
}
}
module.exports = {
UptimeKumaServer
};