ExpressJS Series: Parsing request body using Middlewares

expressjs-body-parser-4-index.js

const express = require('express');
const bodyParser = require('body-parser');

let app = express();

// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: false }));
 
// parse application/json
app.use(bodyParser.json());

const myFirstMiddleware = function(req, res, next) {
  console.log('My logger');
  next();
};

const myRouteMiddleware = function(req, res, next) {
  console.log('My logger ', 'only for ', req.path);
  next();
};

const textParser = bodyParser.text({
  defaultCharset: 'utf8',
  inflate: true
});

const urlEncodedParser = bodyParser.urlencoded({
  extended: true,
  inflate: true
});

// Commonly use raw buffer formats in applications
// video/ogg
// audio/ogg
// application/vnd.ms-excel
// application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
// application/xhtml+xml
// application/zip

const rawParser = bodyParser.raw({
  inflate: true,
  limit: '200kb' // Default is 100 kb
  type: 'application/xml',
  verify: function(req, res, buf, encoding) {
  /* Verify that the buffer is not corrupt or that the client is untrustworthy, etc */
  }
});

app.use(myFirstMiddleware);

app.get('/', function(req, res) {res.status(200).send({status: "running", time: Date.now()})});
/* POST */
app.post('/', textParser, myRouteMiddleware, function(req, res) {res.status(200).send({status: "running", time: Date.now()})});
/* PUT */
app.put('/', urlEncodedParser, function(req, res) {res.status(200).send({status: "running", time: Date.now()})});
/* PATCH */
app.patch('/', rawParser, function(req, res) {res.status(200).send({status: "running", time: Date.now()})});
/* DELETE */
app.delete('/', function(req, res) {res.status(200).send({status: "running", time: Date.now()})});
/* OPTIONS */
/*
app.options('/', function(req, res) {res.status(200).send({status: "running", time: Date.now()})});
*/
app.post('/api/myform/:categoryId', function(req, res) {
  res.status(200).send({paramValues: req.params.categoryId, queryParamValues: req.query.create + ' ' + req.query.notify});
});

const host = "127.0.0.1";
const port = 9001;
app.listen(host, port, function() {console.log("Server started")});