soundbirder/app.js

const createError = require('http-errors');
const express = require('express');
const session = require('express-session');
const csrf = require('csurf');
const path = require('path');
const cookieParser = require('cookie-parser');
const logger = require('morgan');
const i18n = require('i18n-2');

const indexRouter = require('./routes/index');
const apiRouter = require('./routes/api');
const authRouter = require('./routes/auth');

const app = express();

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

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')));

const sess = {
  secret: 'keyboard cat',
  resave: true,
  saveUninitialized: true
}

if (app.get('env') === 'production') {
  app.set('trust proxy', 1); // trust first proxy
  sess.cookie.secure = true; // serve secure cookies
}

app.use(session(sess));

i18n.expressBind(app, {
  locales: ['en', 'es', 'fr', 'de'],
  defaultLocale: 'en',
  cookieName: 'locale'
});

app.use(function (req, res, next) {
  req.i18n.setLocaleFromQuery();
  req.i18n.setLocaleFromCookie();
  next();
});

app.all('*', function(req, res, next) {
  // set locale
  var rxLocale = /^\/(fr|en)/i;
  if(rxLocale.test(req.url)){
      const arr = rxLocale.exec(req.url);
      const locale=arr[1];
      req.i18n.setLocale(locale);
  } else {
      req.i18n.setLocale('en');
  }
  // add extra logic
  next();
});

app.use('/dist/leaflet', express.static('node_modules/leaflet/dist'));
app.use('/dist/feather', express.static('node_modules/feather-icons/dist'));
app.use('/dist/axios', express.static('node_modules/axios/dist'));

app.use(function (req, res, next) {
  res.header('Access-Control-Allow-Origin', 'http://localhost:3000');
  res.header(
    'Access-Control-Allow-Headers',
    'Origin, X-Requested-With, Content-Type, Accept'
  );
  next();
});

app.use('/api/0', apiRouter);

const csrfProtection = csrf({ cookie: true });
app.use(csrfProtection);
app.use(/\/(fr|en)/i, indexRouter);
app.use(/\/(fr|en)\/auth/i, authRouter);

// 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;