本篇文章小编给大家分享一下Node.js实现登录注册功能代码示例，文章代码介绍的很详细，小编觉得挺不错的，现在分享给大家供大家参考，有需要的小伙伴们可以来看看。

目录结构

注册页面：

reg.html

    
    css/reg.css">


    

        
用户注册
        

            用户名：
            
        
        

            密 码：
            
        
        注册
    

登录页面：

login.html

    
    


    

        
用户登录
        

            用户名：
            
        
        

            密 码：
            
        
        登录
    

app.js

const http = require("http");
const fs = require("fs");
const url = require("url");
const querystring = require("querystring");
const post = 3000;
//通过http模块创建服务器，并监听端口3000
const server = http.createServer();
server.on("request",(req,res)=>{
    const dataurl = url.parse(req.url);
    //静态伺服
    //默认进入reg.html页面 
    if((req.url == "/" || req.url == "/reg.html") && req.method == "GET" && req.url != "/favicon.ico"){
        fs.readFile("./reg.html","utf8",(err,data)=>{
            if(err){
                fs.readFile("./404.html","utf8",(err,data)=>{
                    res.end(data);
                })
            }
            res.setHeader("Content-type","text/html");
            res.end(data);
        })
    //读取login.html
    }else if(req.url == "/login.html" && req.method == "GET"){
        fs.readFile("./login.html","utf8",(err,data)=>{
            if(err){
                fs.readFile("./404.html","uft8",(err,data)=>{
                    res.end(data);
                })
            }
            res.setHeader("Content-type","text/html");
            res.end(data);
        })
    //读取index.html
    }else if(req.url == "/index.html" && req.method == "GET"){
        fs.readFile("./index.html","utf8",(err,data)=>{
            if(err){
                fs.readFile("./404.html","uft8",(err,data)=>{
                    res.end(data);
                })
            }
            res.setHeader("Content-type","text/html");
            res.end(data);
        })
    //读取reg.css
    }else if(req.url == "/src/css/reg.css" && req.method == "GET"){
        fs.readFile("src/css/reg.css","utf8",(err,data)=>{
            if(err){
                console.log(err);
            }
            res.setHeader("Content-type","text/css");
            res.end(data);
        })
    //读取jquery
    }else if(req.url == "/node_modules/jquery/dist/jquery.js" && req.method == "GET"){
        fs.readFile("./node_modules/jquery/dist/jquery.js","utf8",(err,data)=>{
            if(err){
                console.log(err);
            }
            res.end(data);
        })
    }
})
server.listen(post);

注册接口：

/register

else if(req.url == "/register" && req.method == "POST"){
  let str = '';
    req.on('data',(chunk)=>{
        str += chunk;
    })
    req.on('end',()=>{
        let dataObj = querystring.parse(str);
        fs.readFile("./data.json","utf8",(err,data)=>{
            let obj = JSON.parse(data);   
            for(let i = 0; i < obj.length; i++){
                if(obj[i].username == dataObj.username){
                    return res.end('3');
                }
            }
            obj.push(dataObj);
            fs.writeFile('./data.json',JSON.stringify(obj),'utf8',(err,result)=>{
                if(err){
                    return res.end('2');
                }
                return res.end('1');
            })
        })
    })
}

登录接口：

/login

else if(dataurl.pathname == "/login" && req.method == "GET"){
   console.log(dataurl);
    var userInput = querystring.parse(dataurl.query);
    fs.readFile("./data.json","utf8",(err,data)=>{
        let obj = JSON.parse(data);
        for(let i = 0; i < obj.length; i++){
            if(obj[i].username == userInput.username && obj[i].password == userInput.password){
                return res.end('1');
            }else if(obj[i].username == userInput.username && obj[i].password != userInput.password){
                return res.end('3');
            }
        }
    })
}