Assignment #1 - Node Master Class

assignment01.js

import http from 'http'
import url from 'url'

// config object
const config = {
  httpPort: 8080
}

// retrieve the third argument if user use custom port
if (process.argv.length > 2) {
  let [param, value] = process.argv[2].split('=')
  if (param === '-p') {
    config.httpPort = +value
  }
}

// general http responder
const respond = (res, data = {}, statusCode = 200) => {
  res.setHeader('Content-Type', 'application/json')
  res.writeHead(statusCode)
  res.end(JSON.stringify(data))
}

// create server
function createServer() {
  return http.createServer((req, res) => {
    let parsedUrl = url.parse(req.url, true)

    // remove extra slash
    let trimmedPath = parsedUrl.pathname.replace(/^\/+|\/+$/g, '')

    if (trimmedPath === 'hello') {
      respond(res, { message: 'hello world' })
    } else {
      respond(res, { message: 'not found' }, 404)
    }
  })
}

const server = createServer()

// start the server
server.listen(config.httpPort, () => {
  console.log(`server is listening on port ${config.httpPort}`)
})