npm install -g express

npm install -g express-generator

cd ..
mkdir microblog
cd microblog
express micorblog

cd microblog
npm install
npm start

doctype html
html
 head
  title= title
  link(rel='stylesheet', href='/stylesheets/style.css')
 body
   nav.header
     ul.list
       li.logo
         a(href='/') Microblog
       li
         a(href='/') 首页
       li
         a(href='/login') 登录
       li
         a(href='/reg') 注册
    div.container
      block content
      hr
      footer.footer
        p
          a(href='http://myzhibie.coding.io') myzhibie
          | @2015

extends layout
block content
  main.main
    section.intro
      if message
        h3.indexmes #{message}
      //如果用户登录或者注册成功并且没有在登录状态下点击注册或者登录
      if success&&user
        h1.welcome #{success}，欢迎 #{user} 来到 Microblog
      else if !success&&user
        h1.welcome 欢迎 #{user} 来到 Microblog
      else
        h1.welcome 欢迎来到 Microblog
      h3.tech Microblog是一个基于Node.js,使用express4.12.1,jade1.9.2以及MongoDB搭建起来的微博系统,是对Node.js开发指南一书中教学项目的重构。
      p.btnlist
        if user
          a.login(href='/logout') 退出
          a.userlink(href='/users/#{user}') 发表文章
        else
          a.login(href='/login') 登录
          a.register(href='/reg') 立即注册
    section.show
      each val in posts
        article.col
          h3.author #{val.user}说
          p
            | #{val.post}

body {
 padding: 50px;
 font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
}
html,body,ul,p,hr,h3{
  margin:0;
  padding: 0;
}
a {
 color: #00B7FF;
}
.header{
  background:#337aB7;
  width: 100%;
  height: 60px;
  color: #fff;
  font-size: 22px;
  overflow: hidden;
}
.list{
  line-height: 60px;
}
.navigation{
  overflow: hidden;
}
.list li{
  list-style: none;
  float: left;
  display: inline-block;
  margin-left: 20px;
  margin-right: 20px;
}
.list li a{
  text-decoration: none;
  color: #fff;
}

.list li a:hover{

}
.list li:not(:first-child) a:hover{
  font-size: 26px;
  color: #F5F5F5;
}
.logo{
  font-size: 26px;
  font-weight: 700;
}
.container{
  min-height: 500px;
  text-align: center;
  width: 100%;
}
.footer{
  width: 100%;
  height: 50px;
  font-size: 22px;
  background:#F5F5F5 ;
  line-height: 50px;
}
.footer a{
  color:#337aB7;
  text-decoration: none;
}
.main{
  color: #000000;
  width: 96%;
  margin: 30px auto;
}
.intro{
  width: 100%;
  margin:0 auto;
  border-radius: 5px;
  height: 300px;
  background:#F5F5F5 ;

}
.userintro{
  width: 100%;
  margin:0 auto;
  border-radius: 5px;
  height: 200px;
  background:#F5F5F5 ;
}
.welcome{
  padding-top: 50px;
  padding-left:50px;
  font-size: 50px;
  text-align: left;
  padding-bottom: 0;
  margin: 0;
}
.tech{
  text-align: left;
  padding-left:50px;
  margin: 0;
}
.show{
  overflow: hidden;
  width: 100%;
}
.show li{
  text-align: left;
  font-size: 18px;
}
.col{
  display: inline-block;
  float: left;
  width: 32%;
  height: 100px;
  overflow: hidden;
  padding-right: 20px;
  text-align: left;
  text-overflow: ellipsis;
}
.author{
  margin-top: 10px;
  margin-bottom: 3px;
}
.btnlist{
  padding-left: 50px;
  text-align: left;
}
.login{
  display: inline-block;
  padding-left: 15px;
  padding-right: 15px;
  height: 38px;
  line-height: 40px;
  background: -webkit-gradient(linear, left top, left bottom, from(#0068A6), to(#337aB7));
  color: #fff;
  text-align: center;
  border-radius: 5px;
  font-size: 20px;
  font-weight: 600;
  border: 1px solid #ccc;
  text-decoration: none;
  margin-right: 10px;
}
.register{
  display: inline-block;
  padding-left: 15px;
  padding-right: 15px;
  height: 38px;
  line-height: 40px;
  background: -webkit-gradient(linear, left top, left bottom, from(#fff), to(#F5F5F5));
  color: #000;
  text-align: center;
  border-radius: 5px;
  font-size: 20px;
  font-weight: 600;
  border: 1px solid #ccc;
  text-decoration: none;
}
.field{
  margin-top: 20px;
  margin-left: 50px;
  text-align: left;
  margin-bottom: 20px;
  border:none;
  border-bottom: 1px solid #ccc;
}
.label{
  font-size: 18px;
  font-weight: 600;
  line-height: 100%;
  display: inline-block;
  width: 10%;
  vertical-align: middle;
  text-align: right;
  padding-right: 10px;
}
.regheader{
  text-align: left;
  font-size: 24px;
  font-weight: 600;
}
.regform{
  text-align: left;
  padding-left: 100px;
  margin-bottom: 20px;
}
.regform input[type='text'],input[type='password']{
  width: 200px;
  height: 20px;
}
.regform input[type='submit']{
  width: 120px;
  height: 30px;
  color: #fff;
  background:-webkit-gradient(linear, left top, left bottom, from(#0068A6), to(#337aB7));
  border-radius: 5px;
  font-size: 20px;
}

.item{
  margin:20px;
  width: 100%;
}
.mess{
  font-size: 18px;
  color: #E73C3C;
  background: #F2DEDE;
  border-radius: 5px;
  width: 300px;
  text-align: center;
  margin-left: 100px;
}
.indexmes{
  height: 30px;
  line-height: 30px;
  background: #F2DEDE;
  color: #E73C3C;
}
.article{
  width: 60%;
  height: 30px;
  border-radius: 3px;
  border: 1px solid #A3C732;
  margin-top: 5px;
  font-size: 20px;
}
.submit{
  height: 40px;
  vertical-align: middle;
  padding: 0;
  margin-top: -5px;
  margin-left: 5px;
  width: 80px;
  background: #A3c732;
  font-size: 20px;
  border: none;
  border-radius: 5px;
  color: #fff;
}
.submitform{
  margin-top: 25px;
  margin-left: -10px;
}
.userlink{
  display: inline-block;
  text-decoration: none;
  line-height: 38px;
  height: 38px;
  vertical-align: middle;
  padding: 0;
  margin-top: -8px;
  margin-left: 5px;
  width: 90px;
  text-align: center;
  background: #A3c732;
  font-size: 20px;
  font-weight: 600;
  border-radius: 5px;
  color: #fff;
  border: 1px solid #ccc;
}
.usertitle{
  text-align: left;
  padding-top: 5px;
  padding-bottom: 0;
  padding-left: 5px;
  margin-bottom: 8px;
}
.usersuccess{
  height: 30px;
  background: #DFF0D8;
  line-height: 30px;
  color: #3C7668;
}

extends layout
block content
  h3.field.regheader #{title}
  form.regform(method='post')
    p.mess #{message}
    div.item
      label.label(for='username') 用户名
      input(type='text',placeholder='输入注册用户名',id='username',name='username')
    div.item
      label.label(for='password') 用户密码
      input(type='password',placeholder='用户密码',id='password',name='password')
    div.item
      label.label(for='passwordconf') 重复密码
      input(type='password',placeholder='重复密码',id='passwordconf',name='passwordconf')
    div.item
      label.label
      input(type='submit' id='sub',name='sub' value='注册')

extends layout
block content
  h3.field.regheader #{title}
  form.regform(method='post')
    p.mess #{message}
    div.item
      label.label(for='username') 用户名
      input(type='text',placeholder='输入登陆用户名',id='username',name='username')
    div.item
      label.label(for='password') 用户密码
      input(type='password',placeholder='用户密码',id='password',name='password')
    div.item
      label.label
      input(type='submit' id='sub',name='sub' value='登陆')

var settings=require("./settings");
var mongoose=require('mongoose');
mongoose.connect("mongodb://"+settings.ip+"/"+settings.db);
var db=mongoose.connection;
module.exports={
  "dbCon":db,
  "mongoose":mongoose
};

module.exports={
  "ip":"localhost",
  "db":"microblog",
  "host":27071
};

var mongoose=require('../db').mongoose;
var schema=new mongoose.Schema({
  name:'string',
  password:'string'
});
var User=mongoose.model('User',schema);
module.exports=User;

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var routes = require('./routes/index');
var users = require('./routes/users');
var session = require("express-session");
var MongoStore=require('connect-mongo')(session);
var db = require('./db');
var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

// uncomment after placing your favicon in /public
//app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(session({
  secret:"myzhibie",
  store:new MongoStore({
  mongooseConnection:db.dbCon
  })
}));


 app.use('/', routes);
 app.use('/users', users);

var express = require('express');
var crypto = require('crypto');
var router = express.Router();
var db=require('../db');
var User=require('../models/user');
var Post=require('../models/post');
/* GET home page. */
router.get('/', function(req, res, next) {
  Post.find({},function(err,posts){
    if(err){
      req.session.message=err.message;
      return res.redirect('/');
    }
    res.render('index',{
      posts:posts
    });
  });

});
//发表微博
router.post('/post',function(req, res, next){
  var currentUser=req.session.user;
  var post=new Post({
    user:currentUser.name,
    post:req.body.article,
    updated:getTime(new Date())
  });
  post.save(function(err){
    if(err){
      req.session.message=err.message;
      return res.redirect('/reg');
    }
    req.session.success="发表成功";
    res.redirect('/users/'+currentUser.name);
  });


});

function getTime(date){
  return date.getFullYear()+
  "-"+date.getMonth()+1+"-"+
  date.getDate()+" "+
  date.getHours()+":"+
  date.getMinutes();
}
router.get('/reg', isLogin);
//用户进入注册页面
router.get('/reg',function(req,res){
  res.render('reg',{title:"用户注册"});
});
router.post('/reg', isLogin);
//用户点击注册按钮
router.post('/reg',function(req,res){
  if(req.body['password']!= req.body['passwordconf']){
    req.session.error="两次密码不一致";
    return res.redirect('/reg');
  }
  var md5=crypto.createHash('md5');
  var password=md5.update(req.body.password).digest('base64');
  var newUser=new User({
    name:req.body['username'],
    password:password
  });
  User.findOne({name:newUser.name},function(err,user){
    if(user){
      err="用户名已经存在";
    }
    if(err){
      req.session.error=err;
      return res.redirect('/reg');
    }
    newUser.save(function(err){
      if(err){
        req.session.error=err.message;
        return res.redirect('/reg');
      }
      req.session.user=newUser;
      req.session.success="注册成功";
      res.redirect('/');
    });
  });
});
router.get('/login',isLogin);
router.get('/login',function(req,res){
  res.render('login',{title:"用户登陆"});
});
router.post('/login',isLogin);
router.post('/login',function(req,res){
  var md5=crypto.createHash('md5');
  var password=md5.update(req.body.password).digest('base64');
  User.findOne({name:req.body.username},function(err,user){
    if(!user){
      req.session.error="用户不存在";
      return res.redirect('/login');
    }
    if(user.password!=password){
      req.session.error="密码错误";
      return res.redirect('/login');
    }
      req.session.user=user;
      req.session.success="登录成功";
      res.redirect('/');
  });
});
router.get('/logout',function(req,res){
  req.session.user=null;
  res.redirect('/');
});
function isLogin(req,res,next){
  if(req.session.user){
    req.session.message="用户已登录";
    return res.redirect('/');
  }
  next();
}
module.exports = router;

app.use(function(req,res,next){
//  res.locals.user=req.session.user;
  var err=req.session.error;
  var success=req.session.success;
  var user=req.session.user;
  var mess=req.session.message;
  delete req.session.success;
  delete req.session.error;
  delete req.session.message;
  if(err){
    res.locals.message="*"+err;
  }
  if(mess){
    res.locals.message="*"+mess;
  }
  if(success){
    res.locals.success=success;
  }
  if(user){
    res.locals.user=user.name;
  }
  next();
});