node+express+mongodb,登陆代码备份（自用）

1、项目结构目录
—bin
—node_modules
—public
—routes
—views
app.js
package.json

2、routes代码：index.js

var express = require('express');
var router = express.Router();
var mongodb = require("mongodb").MongoClient;  //数据库，用mongobd链接，install一下

mongodb.connect("mongodb://127.0.0.1:27017/test", function(err, db) {
  db.createCollection("users",{},function(err, user) {
    // body...

      /* index. */
      router.get('/', function(req, res) {
            res.render('index', { title: 'index' });
      });

      /*login*/
      router.get('/login', function(req, res) {
          res.render('login', { title: 'login' });
      });

      /*logout*/
      router.get('/logout', function(req, res) {
            res.render('logout', { title: 'logout' });
      });

      /*home*/
      router.post('/home', function(req, res) {
          var query_doc = {userid: req.body.name, password: req.body.password};
          console.log(query_doc);
          user.find(query_doc).limit(1).toArray(function(err, items){
              if(items.length === 1){
                  console.log(query_doc.userid + ": login success in " + new Date());
                  res.render('home', { title: 'home' });
              }else{
                  console.log(query_doc.userid + ": login failed in " + new Date());
                  res.redirect('/');
              }
          });
      });
  });

});

module.exports = router;

3、view代码

//layout.jade
doctype html
html
  head
    title=  title
    link(rel='stylesheet', href='/stylesheets/style.css')
  body
    block content

//index.jade
extends layout

block content
        h1 Hwllo world
        p welcome to #{title}
        a(href="/login") 登陆

//login.jade
extends layout

block content
    form(method="post",action="home")
        p 用户名
            input(type="text" name="name")
        p 密码
            input(type="password" name="password")
        //- input(type="submit",value="登录") 
        p
            button(type="submit",value="登录") 登录

//home.jade
extends layout

block content
    p
        a(href="logout") 登出

//logout.jade
extends layout

block content

    p 正在登出...

    script(type="text/javascript").
        setTimeout(function(){window.location.href = "/";}, 1000);

4、数据库添加数据：userid:admin,password:123456
5、运行结果

6、用到的代码/网站：
Node:http://www.runoob.com/nodejs/nodejs-tutorial.html
Express官方入门文档：http://www.expressjs.com.cn/starter/installing.html
MongoDB ：
—a、启动：mongod –dbpath “数据库位置”
—b、cmd进入mongo
—c、相关指令http://docs.mongoing.com/manual-zh/crud.html
相关示例代码：
http://www.cnblogs.com/hutuzhu/p/4487143.html（单一登陆功能）
https://github.com/nswbmw/N-blog（挺具体全面的）