110 lines
3.6 KiB
JavaScript
110 lines
3.6 KiB
JavaScript
/* jshint esversion: 6, asi: true, node: true */
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/* eslint no-unused-expressions: ["error", { "allowShortCircuit": true, "allowTernary": true }],
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no-console: ["error", { allow: ["warn", "error", "info"] }] */
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// app.js
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// eslint-disable-next-line import/order
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const config = require('./config');
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const path = require('path');
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const nodeRoot = path.dirname(require.main.filename);
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const publicPath = path.join(nodeRoot, 'client', 'public');
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const express = require('express');
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const logger = require('morgan');
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const app = express();
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const server = require('http').Server(app);
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const favicon = require('serve-favicon');
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const io = require('socket.io')(server, config.socketio);
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const session = require('express-session')(config.express);
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const appSocket = require('./socket');
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const { setDefaultCredentials, basicAuth } = require('./util');
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const { webssh2debug } = require('./logging');
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const { reauth, connect, notfound, handleErrors } = require('./routes');
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setDefaultCredentials(config.user);
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// safe shutdown
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let remainingSeconds = config.safeShutdownDuration;
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let shutdownMode = false;
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let shutdownInterval;
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let connectionCount = 0;
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// eslint-disable-next-line consistent-return
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function safeShutdownGuard(req, res, next) {
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if (!shutdownMode) return next();
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res.status(503).end('Service unavailable: Server shutting down');
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}
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// express
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app.use(safeShutdownGuard);
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app.use(session);
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if (config.accesslog) app.use(logger('common'));
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app.disable('x-powered-by');
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app.use(favicon(path.join(publicPath, 'favicon.ico')));
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app.use(express.urlencoded({ extended: true }));
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app.post('/ssh/host/:host?', connect);
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app.post('/ssh', express.static(publicPath, config.express.ssh));
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app.use('/ssh', express.static(publicPath, config.express.ssh));
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app.use(basicAuth);
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app.get('/ssh/reauth', reauth);
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app.get('/ssh/host/:host?', connect);
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app.use(notfound);
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app.use(handleErrors);
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// clean stop
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function stopApp(reason) {
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shutdownMode = false;
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if (reason) console.info(`Stopping: ${reason}`);
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clearInterval(shutdownInterval);
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io.close();
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server.close();
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}
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// bring up socket
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io.on('connection', appSocket);
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// socket.io
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// expose express session with socket.request.session
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io.use((socket, next) => {
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socket.request.res ? session(socket.request, socket.request.res, next) : next(next); // eslint disable-line
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});
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function countdownTimer() {
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if (!shutdownMode) clearInterval(shutdownInterval);
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remainingSeconds -= 1;
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if (remainingSeconds <= 0) {
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stopApp('Countdown is over');
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} else io.emit('shutdownCountdownUpdate', remainingSeconds);
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}
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const signals = ['SIGTERM', 'SIGINT'];
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signals.forEach((signal) =>
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process.on(signal, () => {
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if (shutdownMode) stopApp('Safe shutdown aborted, force quitting');
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if (!connectionCount > 0) stopApp('All connections ended');
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shutdownMode = true;
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console.error(
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`\r\n${connectionCount} client(s) are still connected.\r\nStarting a ${remainingSeconds} seconds countdown.\r\nPress Ctrl+C again to force quit`
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);
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if (!shutdownInterval) shutdownInterval = setInterval(countdownTimer, 1000);
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})
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);
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module.exports = { server, config };
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const onConnection = (socket) => {
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connectionCount += 1;
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socket.on('disconnect', () => {
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connectionCount -= 1;
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if (connectionCount <= 0 && shutdownMode) {
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stopApp('All clients disconnected');
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}
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});
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socket.on('geometry', (cols, rows) => {
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// TODO need to rework how we pass settings to ssh2, this is less than ideal
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socket.request.session.ssh.terminfo = { cols, rows };
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webssh2debug(socket, `SOCKET GEOMETRY: termCols = ${cols}, termRows = ${rows}`);
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});
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};
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io.on('connection', onConnection);
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