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TEACHING-MATERIALS/exercises/08_forms/01_simple/express.js

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'use strict'
const express = require('express')
const bodyParser = require('body-parser')
const app = express()
app.use(bodyParser.urlencoded({ extended: true }))
app.use(express.static('public'))
const port = 8080
app.get('/postform', (req, res) => {
res.sendFile(`${__dirname}/html/post.html`)
})
app.get('/getform', (req, res) => {
res.sendFile(`${__dirname}/html/get.html`)
})
app.get ('/lists', (req, res) => {
res.sendFile(`${__dirname}/html/lists.html`)
})
app.get ('/semantic', (req, res) => {
res.sendFile(`${__dirname}/html/form-skel.html`)
})
// this route processes data in the querystring
app.get('/', (req, res) => {
res.write('<html><body><h1>Retrieving Data in Querystring</h1><table>')
for (const param in req.query) {
res.write(`<tr><td>${param}</td><td>${req.query[param]}</td></tr>`)
}
res.write('</table></body></html>')
})
// this route processes data in the request body
app.post('/', (req, res) => {
console.log(req.body)
const data = req.body
res.write('<html><body><h2>Retrieving Data in Body</h2><table>')
for (const key in data) {
if (data.hasOwnProperty(key)) {
console.log(key)
console.log(data[key])
res.write(`<tr><td>${key}</td><td>${data[key]}</td></tr>`)
}
}
res.write('</table></body></html>')
res.end()
})
app.listen(port, () => {
console.log(`app listening on port ${port}`)
})