app.js

const newrelic = require('newrelic');
const express = require('express');
const path = require('path');
const logger = require('morgan');
const {createSession} = require("./services/session");
const fs = require('fs');
const cors = require('cors');
const auth = require('./utils/auth');
const config = require("./config");

const LOG_FOLDER = 'logs';
if (!fs.existsSync(LOG_FOLDER)) {
  fs.mkdirSync(LOG_FOLDER);
}

// create a write stream (in append mode)
const accessLogStream = fs.createWriteStream(path.join(__dirname, LOG_FOLDER, 'access.log'), { flags: 'a'})

const filesRouter = require('./routes/files');

const app = express();
if (config.mysqlSessionEnabled) app.use(createSession());
app.use(cors());

// setup the logger
app.use(logger('combined', { stream: accessLogStream }))
app.use(express.json());
app.use(express.urlencoded({ extended: false }));

app.use(auth(["/api/files/ping", "/api/files/version"]));
app.use('/api/files', filesRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next({status: 404, message: `Path: '${req.path}' is not supported!`});
});

// error handler
app.use(function(err, req, res, next) {
  const message = req.app.get('env') === 'development' ? err.message : 'error';

  // render the error page
  res.status(err.status || 500);
  res.json(message);
});

module.exports = app;