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dynamic-websites/exercises/01_http/01_url/index.js
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| #!/usr/bin/env node | |
| /* IMPORTING MODULES */ | |
| const Koa = require('koa') | |
| const Router = require('koa-router') | |
| const bodyParser = require('koa-bodyparser') | |
| const staticFiles = require('koa-static') | |
| const js2xmlparser = require('js2xmlparser') | |
| /* CONFIGURING THE MIDDLEWARE */ | |
| const app = new Koa() | |
| app.use(bodyParser()) | |
| const router = new Router() | |
| app.use(router.routes()) | |
| app.use(staticFiles('./public')) | |
| /* GLOBAL VARIABLES */ | |
| const port = 8080 | |
| let names = [] | |
| function hello(ctx) { | |
| ctx.body = 'Hello World' | |
| } | |
| router.get('/', hello) | |
| router.get('/anon', ctx => { | |
| ctx.body = 'Hello World' | |
| }) | |
| router.get('/books/:index', ctx => { | |
| const books = ['The Hobbit', 'Alice in Wonderland', 'The Secret Garden'] | |
| const parameters = ctx.params | |
| const title = books[parameters.index] | |
| ctx.body = title | |
| }) | |
| router.get('/name', ctx => ctx.body = JSON.stringify(ctx.query)) | |
| router.get('/hello/:name', ctx => { | |
| let myname = ctx.params.name | |
| if(ctx.query.format === 'upper') myname = myname.toUpperCase() | |
| ctx.body = `hello ${myname}` | |
| }) | |
| router.post('/form', ctx => { | |
| const minLength = 3 | |
| console.log(ctx.request.body) | |
| const body = ctx.request.body | |
| if(body.lastname.length >= minLength) { | |
| names.push( { firstname: body.firstname, lastname: body.lastname } ) | |
| ctx.status = 201 | |
| ctx.body = `your name is ${body.firstname} ${body.lastname}` | |
| } else { | |
| ctx.status = 422 | |
| ctx.body = 'invalid lastname' | |
| } | |
| //ctx.body = 'form processed' | |
| }) | |
| router.get('/names', ctx => { | |
| let list = names | |
| let search = 'x' | |
| const minLength = 3 | |
| if(ctx.query.search && ctx.query.search.length >= minLength) { | |
| search = ctx.query.search.toLowerCase() | |
| } else if(ctx.headers.search && ctx.headers.search.length >= minLength) { | |
| search = ctx.headers.search.toLowerCase() | |
| } | |
| console.log(`Accept: ${ctx.get('Accept')}`) | |
| if(search.length >= minLength) list = names.filter( val => `${val.firstname} ${val.lastname}`.toLowerCase().includes(search)) | |
| if(list.length === 0) { | |
| ctx.status = 404 | |
| ctx.body = 'No Names found' | |
| return | |
| } | |
| switch (ctx.accepts('application/json', 'application/xml', 'text/html', 'text/html', 'text/csv')) { | |
| case 'text/csv': | |
| ctx.set('content-type', 'text/csv') | |
| ctx.body = formatCSV(list) | |
| break | |
| case 'text/html': | |
| ctx.set('content-type', 'text/html') | |
| ctx.body = formatHTML(list) | |
| break | |
| case 'application/json': | |
| ctx.set('content-type', 'application/json') | |
| ctx.body = {names: list} | |
| break | |
| case 'application/xml': | |
| ctx.set('content-type', 'application/xml') | |
| ctx.body = js2xmlparser.parse('people', list) | |
| break | |
| default: | |
| ctx.status = 406 | |
| ctx.body = 'unsupported MIME type' | |
| break | |
| } | |
| }) | |
| router.del('/names', ctx => { | |
| names = [] | |
| ctx.status = 204 | |
| ctx.body = 'all names deleted' | |
| }) | |
| function formatCSV(list) { | |
| let data = '' | |
| for(const name of list) data += `${name.firstname}, ${name.lastname}\n` | |
| return data | |
| } | |
| function formatHTML(list) { | |
| let data = '<html><head><link rel="stylesheet" href="main.css"/></head><body><table>' | |
| for(const name of list) { | |
| data += `<tr><td>${name.firstname}</td><td>${name.lastname}</td>\n` | |
| } | |
| data += '</table></body></html>' | |
| return data | |
| } | |
| module.exports = app.listen(port, () => console.log(`listening on port ${port}`)) |