xpg/boilerplate/middlewares/error.middleware.js

a module to help auto generating correct structure of rest services in express (model-view-controller-service).

const createError = require('http-errors');
const path = require('path')

const BaseError = require("../errors/BaseError")

module.exports = (app) => {

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

  app.use(function (err, req, res, next) {
    if (err instanceof BaseError)
      return res.status(err.statusCode).json({
        error: err.name,
        status: err.statusCode,
        description: err.message
      })

    // 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(path.join(__dirname, '../views/error'));
  })

}