#!/usr/bin/env node/**
* Module dependencies.
*/
const app = require('../app')
const http = require('http')
const config = require('../config')
/**
* Get port from environment and store in Express.
*/
const port = normalizePort(process.env.PORT || config.port)
// app.set('port', port);
/**
* Create HTTP server.
*/
const server = http.createServer(app.callback())
/**
* Listen on provided port, on all network interfaces.
*/
server.listen(port)
server.on('error', onError)
server.on('listening', onListening)
/**
* Normalize a port into a number, string, or false.
*/
function normalizePort(val) {
const port = parseInt(val, 10)
if (isNaN(port)) {
// named pipe
return val
}
if (port >= 0) {
// port number
return port
}
return false
}
/**
* Event listener for HTTP server "error" event.
*/
function onError(error) {
if (error.syscall !== 'listen') {
throw error
}
const bind = typeof port === 'string'
? 'Pipe ' + port
: 'Port ' + port
// handle specific listen errors with friendly messages
switch (error.code) {
case 'EACCES':
console.error(bind + ' requires elevated privileges')
process.exit(1)
break
case 'EADDRINUSE':
console.error(bind + ' is already in use')
process.exit(1)
break
default:
throw error
}
}
/**
* Event listener for HTTP server "listening" event.
*/
function onListening() {
const addr = server.address()
const bind = typeof addr === 'string'
? 'pipe ' + addr
: 'port ' + addr.port
console.log('Listening on ' + bind)
}
相信用过koa-generator对这个代码斌并不陌生，这其实就是他里面的代码，express项目的www文件也基本差不多。还是希望大家可以把这里面的代码过一遍，它的基本思路就是利用了node.js中的http模块，让http暴露你的端口并进行监听，这个端口是在配置文件config.js中引入的。
app.js
先简单的看一下代码
'use strict'const Koa = require('koa')
const bodyParser = require('koa-bodyparser')()
const staticCache = require('koa-static-cache')
const config = require('./config')
const publicRouter = require('./routes/public')
const privateRouter = require('./routes/private')
const { loggerMiddleware } = require('./middlewares/logger')
const { errorHandler, responseHandler } = require('./middlewares/response')
const app = new Koa()
// Logger
app.use(loggerMiddleware)
// Error Handler
app.use(errorHandler)
// Global Middlewares
app.use(bodyParser)
app.use(staticCache(config.publicDir))
