Practical Microservices

Mounting Middleware

Here is the start of our middleware:

first-pass/src/app/express/mount-middleware.js

const express = require('express')
const { join } = require('path')

const attachLocals = require('./attach-locals') 
const lastResortErrorHandler = require('./last-resort-error-handler')
const primeRequestContext = require('./prime-request-context')
function mountMiddleware (app, env) { 
  app.use(lastResortErrorHandler) 
  app.use(primeRequestContext)
  app.use(attachLocals)
  app.use(
    express.static(join(__dirname, '..', 'public'), { maxAge: 86400000 }))
}

module.exports = mountMiddleware

Middlewares in Express are functions that we run as part of the request/response cycle and ...