app.js updated

+var express = require('express');
+var app = express();
+var bodyParser = require('body-parser');
+var session = require('express-session')
+
+app.use(session({ secret: 'keyboard cat', cookie: { maxAge: 60000 }}))
+app.use(bodyParser.urlencoded({ extended: false }));
+app.use(bodyParser.json());
+
+
+var users = new Array();
+users[0] = {
+	"userId" : "aaa",
+	"name" : "jin",
+	"password" : "1234",
+	"isAdmin" : true
+}
+users[1] = {
+	"userId" : "asd",
+	"name" : "kim",
+	"password" : "1234",
+	"isAdmin" : false
+}
+
+app.put('/login', function (req, res) {
+	if(req.session.userId!=null)
+	{
+		res.send("이미 로그인 상태입니다")
+	}
+	else
+	{
+	var users_num=users.length
+	console.log(users_num) 
+	var checking=0
+	while(users_num>0)
+	{
+		console.log(users[users_num-1].userId)
+		if (users[users_num-1].userId==req.body.userId)
+		{
+			checking=1
+			console.log("id ok")
+			if(users[users_num-1].password==req.body.password)
+			{
+				req.session.userId=req.body.userId
+				if(users[users_num-1].isAdmin==true)
+				{
+					req.session.isAdmin=1
+					res.send("login as admin");
+					console.log("admin ok")
+				}
+				else
+				{
+					console.log("guset ok")
+					res.send("login as guest");
+				}
+			}
+			else
+			{
+				console.log("passwd ok")
+				res.send("wrong password");
+			}
+		}
+		
+	
+		users_num-=1
+	}
+	
+	// users 배열에서 찾도록 처리 해야 함
+	// admin 여부를 확인하여 체크
+	// req.body.id : ID  -> req.body.userId 로 변경했습니다
+	// req.body.name : 패스워드  -> req.body.password 로 변경했습니다 
+if (checking==0)
+{
+	res.send("no id")
+}
+	}	
+});
+app.put('/logout', function (req, res) {
+	// Logout
+	if(req.session.userId!=	null&&req.session.userId==req.body.userId)
+	{// 세션 유효 여부를 체크하고 세션 Delete
+	req.session.userId = null
+	req.session.isAdmin= 0
+	res.send("LogOut");
+	}
+	else if(req.session.userId!=null&&req.session.userId!=req.body.userId)
+		{
+			res.send("로그아웃 body를 다시 한번 해보세요(현재 로그인 된 아이디와 다름")
+		}
+
+	else
+	{
+		res.send("already Logout")
+	}
+
+});
+
+var auth = function (req, res, next) {
+	// Session Check
+	// 어드민 여부 체크 필요
+	if (req.session.userId != null)
+	{
+		if(req.session.isAdmin ==1)
+		{
+			next();
+		}
+		else
+		{
+			res.send("only admin can use this function")
+		}
+	}
+	else
+		res.send("Error");
+
+};
+app.get('/users/:userId', auth,function (req, res) {
+	var users_num_get=users.length// get User Information
+	var user_id=String(req.params.userId)
+	console.log(user_id)
+	var checking2=0
+	while(users_num_get>0)
+	{
+		
+		if(users[users_num_get-1].userId==user_id)
+		{
+			checking2=1
+			res.send(users[users_num_get-1]);
+			res.end()
+		}
+		else
+		{
+			console.log("")
+		}
+	users_num_get-=1
+	
+	}
+if(checking2==0)
+{
+ res.send("해당 아이디가 없습니다.")
+}
+});
+app.post('/users',auth, function(req,res)
+{
+	var num=users.length
+	users[num]=
+		  {
+			"userId" : req.body.userId,
+			"name" : req.body.name,
+			"password" : req.body.password,
+			"isAdmin" : req.body.isAdmin
+		  }
+	console.log(users[num])	
+	res.send("사용자가 생성되었습니다.")  
+	
+
+});
+// 사용자 추가 시에 admin 여부도 추가해야 함
+app.put('/users',auth, function(req,res)
+{
+	num=users.length
+	checking2=0
+	while(num>0)
+	{
+		if(users[num-1].userId==req.body.userId)
+		{
+			users[num-1]=
+		  {
+			"userId" : req.body.userId,
+			"name" : req.body.name,
+			"password" : req.body.password,
+			"isAdmin" : req.body.isAdmin
+		  }
+			console.log(users[num-1])	
+			res.send("사용자 정보가 변경되었습니다.")
+			checking2=1  
+		}
+		num-=1
+}
+if (checking2==0)
+{
+	res.send("해당 사용자가 없습니다")
+}
+
+});
+app.delete('/users/:userId',auth, function(req,res)
+{
+	var id_check=req.params.userId
+	num=users.length
+	checking2=0
+	while(num>0)
+	{
+		if(users[num-1].userId==id_check)
+		{
+			users.splice(num-1,1)
+			checking2=1
+			res.send("삭제가 완료되었습니다.")
+		}
+		num-=1
+}
+if (checking2==0)
+{
+	res.send("해당 사용자가 없습니다")
+}
+});
+
+var server = app.listen(80);