node.js服务器基础结构

作者: Mokingc | 来源:发表于2019-11-05 14:53 被阅读0次

node.js服务器基础结构
AJAX基础
构建node.js应用模块
搭建Web服务器-Node.js
Express框架
Node.js在线考试系统——服务器与客户端的交互
Netty Socketio解决Access-Control-A
^。^_________初探Node.js 安装篇_______
angular (6)与服务器通信
Node.js 网络开发

在node.js中，要使用 HTTP 服务器和客户端，必须使用http模块
const http = require('http')

模拟接受get请求的服务器

const http = require('http')
const url = require('url')

let server = http.createServer(function (request, response) {
    console.log('request.url:', request.url)
    let { pathname, query } = url.parse(request.url, true)

    console.log(pathname, query)
})

server.listen(8090)

其中可以使用url模块中的url.parse()将得到的请求地址进行解析，假如地址栏输入了
[http://localhost:8090/reg?user=moking&password=123456](http://localhost:8090/reg?user=moking&password=123456) url.parse(request.url, true)的解析结构就为：/reg [Object: null prototype] { user: 'moking', password: '123456' }

模拟接受post数据请求的服务器

const http = require('http')
const querystring = require('querystring')

let server = http.createServer(function (req, res) {
    let arr = []
    req.on('data', buffer => {
        arr.push(buffer)
    })
    req.on('end', () => {
        let buffer = Buffer.concat(arr)
        let post = querystring.parse(buffer.toString())

        console.log(post)
    })
})

server.listen(8090)

其中querystring模块提供用于解析和格式化 URL 查询字符串的实用工具，可以将数据进行解析。querystring.parse()与上面的url.parse()类似。

模拟网页注册登入的服务器

const http = require('http')
const url = require('url')
const fs = require('fs')
const querystring = require('querystring')

let users = {}

http.createServer((req, res) => {
    let path = '', get = {}, post = {}

    if (req.method == 'GET') {
        let { pathname, query } = url.parse(req.url, true)

        path = pathname
        get = query
        complete()
    } else if (req.method == 'POST') {
        path = req.url
        let arr = []
        req.on('data', buffer => {
            arr.push(buffer)
        })
        req.on('end', () => {
            let buffer = Buffer.concat(arr)

            post = querystring.parse(buffer.toString())
            complete()
        })
    }
    function complete() {
        let { username, password } = get
        if (path == '/reg') {
            if (users[username]) {
                res.write(JSON.stringify({ error: 1, msg: `此用户已存在` }))
                res.end()
            } else {
                users[username] = password
                res.write(JSON.stringify({ error: 0, msg: `` }))
                res.end()
            }
        } else if (path == '/login') {
            if (!users[username]) {
                res.write(JSON.stringify({ error: 1, msg: `找不到此用户` }))
                res.end()
            } else if (users[username] != password) {
                res.write(JSON.stringify({ error: 1, msg: `密码错误` }))
                res.end()
            } else {
                res.write(JSON.stringify({ error: 0, msg: `` }))
                res.end()
            }

        } else {
            fs.readFile(`www${req.url}`, (err, buffer) => {
                if (err) {
                    res.writeHeader(404)
                    res.write('Not Found')
                    res.end()
                } else {
                    res.write(buffer)
                    res.end()
                }
            })
        }
    }
}).listen(8080)

测试网页

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <form action="http://localhost:8090/aaa" method="post">
        用户：<input type="text" name="username" id="">
        密码： <input type="password" name="password">
        <button type="submit">提交</button>
    </form>

</body>

</html>