初学node.js-nodejs中实现用户登录路由

2019-05-23 09:55:39来源：博客园阅读 ()

经过前面几次的学习，已经可以做下小功能，今天要实现的事用户登录路由。

一、users_model.js 功能:定义用户对象模型

var mongoose=require('mongoose'),
      Schema=mongoose.Schema;
var UserSchema=new Schema({
      username:{type:String,unique:true},
      email:String,
      color:String,
      hashed_password:String
});
mongoose.model('User',UserSchema);

二、users_controller.js 功能:为Express服务器实现用户登录路由

var crypto=require('crypto');
var mongoose=require('mongoose'),User=mongoose.model('User');
function hashPW(pwd){
    return crypto.createHash('sha256').update(pwd).
    digest('base64').toString();
}
//实现用户登录路由
exports.login=function (req,res){
    User.findOne({username:req.body.username})
    .exec(function(err,user){
        if(!user){
            err='User Not Found';
        }else if(user.hashed_password===hashPW(req.body.password.toString())){
            req.session.regenerate(function(){
                req.session.user=user.id;
                req.session.username=user.username;
                req.session.msg='Authenticated as ' +user.username;
                res.redirect('/');
            });
        }else{
            err='Authentication failed. ';
        }
        if(err){
            req.session.regenerate(function(){
                req.session.msg=err;
                res.redirect('/login');
            });
        }
    });
};

三、login.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>用户登录</title>
<link rel="stylesheet"type="text/css" href="/static/css/styles.css" />
</head>
<body>
<div class="form-container">
 <p class="form-header">登录</p>
 <form method="POST" >
    <label>用户名:</label>
     <input type="text" name="username"><br>
     <label>密码:</label>
     <input type="password" name="password"><br>
     <input type="submit" value="登录">
 </form>
 </div>
 <a href="/signup">注册</a>
 <hr> <%=msg %>
</body>
</html>

四、routes.js 功能:为Express服务器实现处理Web请求路由

var crypto=require('crypto');
var express=require('express');
module.exports=function(app){
    var users=require('./controllers/users_controller');
    app.use('/static',express.static('./static')).
    use('/lib',express.static('../lib')
);
app.get('/login',function(req,res){
    if(req.session.user){
        res.redirect('/');
    }
    res.render('login',{msg:req.session.msg})
});
app.post('/login',users.login);