app.js

var express = require('express');
var bodyParser = require('body-parser');
const fs = require('fs'); 
const { v4: uuidv4 } = require('uuid');
var context = require('express-http-context');
const cookieParser = require('cookie-parser');

// Set App Title

process.title = "frostybot-js";

// Load Modules

const loader      = require('./core/core.loader');
loader.load_all()

// Routers

var apiRouter = require('./routes/routes.api');
var guiRouter = require('./routes/routes.gui');

// Load Express

var app = express();

// Get Listen Port

const portfile = __dirname + '/.port';
var port = 80
try {
  var port = fs.readFileSync(portfile, {encoding:'utf8', flag:'r'}) 
} catch {
  var port = (process.env.FROSTYBOT_PORT || 80);
}
app.set('port', port);
fs.writeFileSync(portfile, port.toString())

// Get Reverse Proxy Address 

const proxyfile = __dirname + '/.proxy';
try {
  var proxy = fs.readFileSync(proxyfile, {encoding:'utf8', flag:'r'});
  if (proxy == '') proxy = false;
} catch {
  var proxy = false;
}


// Trust reverse proxy if used
// Only use this if you are configuring Frostybot behind a reverse proxy
// Currently disabled to prevent source address spoofing using X-Forward-For headers
// app.set('trust proxy', true); 

// Save raw buffer for command parsing

function rawBufferSaver (req, res, buf, encoding) {
    if (buf && buf.length) {
      req.rawBody = buf.toString(encoding || 'utf8')
    }
}

// Body parsers

app.use(bodyParser.raw({ type: 'text/plain', verify: rawBufferSaver }));
app.use(bodyParser.json({ type: 'application/json' }));
app.use(bodyParser.urlencoded({ extended: true }));

// Unique Request ID (HTTP Context)

app.use(context.middleware);
app.use(function(req, res, next) {
    context.set('reqId', uuidv4());
    var ip = ((proxy !== false ? req.headers['x-forwarded-for'] : false) || req.socket.remoteAddress).replace('::ffff:','').replace('::1, ','');
    context.set('srcIp', ip);
    var reqId = context.get('reqId');
    next();
});

// Cookie Middleware

app.use(cookieParser());

// Setting up Views

app.set('view engine', 'ejs');
app.set('views', __dirname + '/views');

// Static Assets

app.use(express.static('views/assets'))

// Router Configuration
  
app.use('/rest', apiRouter);      // REST API
app.use('/frostybot', apiRouter); // WebSocket API
app.use('/ui', guiRouter);        // GUI

// Redirect to the GUI
app.all('/', async function(req, res) {
    res.redirect('/ui')
  //  next();
});

// Exception Handler
app.use(function(err, req, res, next) {
  res.send(500, err.message); // or whatever you want to send back
});



// Export app

module.exports = app;