整个功能需要创建四个文档 “app.js” , "db.txt" , "login.html" , "regist.html'。
具体思路相信你在看的过程中很快就能理顺
“app.js”
var http = require("http"); var url = require("url"); var qs = require("querystring"); var fs = require("fs"); http.createServer(function (req , res) { res.setHeader("Access-Control-Allow-Origin" ,"*"); if(req.method == "POST"){ //接受发过来的用户名和密码 var result = ""; var pathName = url.parse(req.url).pathname; req.addListener("data" , function (chunk) { result += chunk; }); req.on("end" , function () { var user = qs.parse(result); //判断用户是否存在 if(user.username){ fs.readFile("db.txt" , "utf-8" , function (err , data) { if(!err){ console.log("读取文件成功"); if(!data){ if(pathName == "/login"){ res.end("该用户不存在"); return; } if(pathName == "/register"){ var arr = []; var obj = {}; obj.username = user.username; obj.password = user.password; arr.push(obj); fs.writeFileSync("db.txt" , JSON.stringify(arr), "utf-8"); res.end("注册成功"); return; } }else { console.log("文件中有数据"); var arr = JSON.parse(data); for(var i = 0 ; i< arr.length;i++){ var obj = arr[i]; if(obj.username == user.username){ if(pathName == "/login"){ if(obj.password == user.password){ res.end("登录成功"); return; }else { res.end("密码错误"); return; } } if(pathName == "/register"){ res.end("密码错误"); return; } } } if(pathName == "/login"){ res.end("用户名不存在"); return; } if(pathName == "/register"){ var obj = {}; obj.username = user.username; obj.password = user.password; arr.push(obj); fs.writeFileSync("db.txt" , JSON.stringify(arr) , "utf-8"); res.end("注册成功"); return; } } }else { console.log("读取文件失败"); } }) } }); }else { res.end("get请求"); } }).listen(3000 , function (err) { if(!err){ console.log("服务器启动成功，端口号3000...") } });
"login.html"
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div> <label>用户名</label> <input type="text" id="user"> </div> <div> <label>密码</label> <input type="text" id="password"> </div> <div> <button id="register">注册</button> </div> </body> </html> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script> $(function () { $("#register").click(function () { $.ajax({ url:"http://localhost:3000/register", type:"POST", data:{ username:$("#user").val(), password:$("#password").val() }, success:function (res) { console.log(res); alert("注册成功") }, error:function (err) { console.log(err); } }) }); }); </script>
"regist.html'
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div> <label>用户名</label> <input type="text" id="user"> </div> <div> <label>密码</label> <input type="text" id="password"> </div> <div> <button id="login">登录</button> <button id="register"><a href="regist.html">注册</a></button> </div> </body> </html> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script> $(function () { $("#login").click(function () { if($("#user").val().length == 0){ return alert("请输入用户名") } if($("#password").val().length == 0){ return alert("请输入密码") } $.ajax({ url:"http://localhost:3000/login", type:"POST", data:{ username:$("#user").val(), password:$("#password").val() }, success:function (res) { console.log(res); // alert("登录成功") }, error:function (err) { console.log(err); } }); }); }); </script>
"db.txt"文档功能是记录传过的内容，只需要自己创建一个就可以了。