express 相关插件

nodemon

nodemon is a tool that helps develop Node.js based applications by automatically restarting the node application when file changes in the directory are detected.

nodemon ./server.js localhost 8080

body-parser

Node.js body parsing middleware.

Parse incoming request bodies in a middleware before your handlers, available under the req.body property.

var express = require('express')
var bodyParser = require('body-parser')

var app = express()
app.use(bodyParser.json({ limit: '32kb' }))

// get file
(req: Request, res: Response, next: NextFunction): void => {
    const { data } = req.body;
}

cookie-parser

Parse Cookie header and populate req.cookies with an object keyed by the cookie names. Optionally you may enable signed cookie support by passing a secret string, which assigns req.secret so it may be used by other middleware.

var express = require('express')
var cookieParser = require('cookie-parser')

var app = express()
app.use(cookieParser())

app.get('/', function (req, res) {
  // Cookies that have not been signed
  console.log('Cookies: ', req.cookies)

  // Cookies that have been signed
  console.log('Signed Cookies: ', req.signedCookies)
})

express-pprof-middleware

Express middleware that exposes pprof endpoints for easy profiling

const pprof = require('express-pprof-middleware');

const app = express();
app.use(pprof);

multer

Multer is a node.js middleware for handling multipart/form-data

const express = require('express')
const multer  = require('multer')

// storage file
const upload = multer({ storage: multer.memoryStorage() }).single('file');
// get file
(req: Request, res: Response, next: NextFunction): void => {
    const { file } = req;
}

form-data

A library to create readable "multipart/form-data" streams.

import FormData from 'form-data';