app.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var helmet = require('helmet');
var expressStaticGzip = require("express-static-gzip");
var mongoose = require('mongoose');

var indexRouter = require('./routes/index');
var apiRouter = require('./routes/api')

var app = express();

app.use(helmet());

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

if (process.env.NODE_ENV === "development") {
  app.use(logger('dev'));
}

app.set('trust proxy', true);

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/dist/bundle', expressStaticGzip(path.join(__dirname, 'dist/bundle'), {
  enableBrotli: true,
  orderPreference: ['br', 'gz'],
  setHeaders: function (res, path) {
    res.setHeader("Cache-Control", "public, max-age=31536000");
  }
}));

// fix depreciation warning.
mongoose.set('useFindAndModify', false);
mongoose.set('useNewUrlParser', true);

// connect to mongodb
mongoose.connect('mongodb://localhost:27017/node_react_bp', function (err) {
  console.log('mongodb connected ?', err ? false : true);
});

// webpack
if (process.env.NODE_ENV === "development") {
  var webpack = require("webpack");
  var webpackConfig = require("./webpack.config");
  var compiler = webpack(webpackConfig);

  app.use(
    require("webpack-dev-middleware")(compiler, {
      noInfo: true,
      publicPath: webpackConfig.output.publicPath
    })
  );

  app.use(require("webpack-hot-middleware")(compiler));
}

// Route handler
app.use('/api/v1', apiRouter) // api route handler
app.use('/', indexRouter); // react handler


// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

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

module.exports = app;