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1 添加依赖项
"mongodb":"1.4.15", "express-session": "1.9.1", "connect-mongo": "0.4.1", "connect-flash": "0.1.1"
其中connect-flash是用来记录登陆session消息的（不知道这样说对不对，因为还没仔细用上）
app.js
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 settings = require(‘./settings‘);
//
var app = express();
var session = require(‘express-session‘);
var MongoStore = require(‘connect-mongo‘)(session);
app.use(session({
resave:false,
saveUninitialized:true,
secret: settings.cookieSecret,
key: settings.db,//cookie name
cookie: {maxAge: 1000 * 60 * 60 * 24 * 30},//30 days
store: new MongoStore({
db: settings.db,
host: settings.host,
port: settings.port
})
}));
// view engine setup
app.set(‘views‘, path.join(__dirname, ‘views‘));
app.set(‘view engine‘, ‘ejs‘);
var flash = require(‘connect-flash‘);
app.use(flash());
// 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(‘/‘, routes);
//app.use(‘/users‘, users);
routes(app);
// catch 404 and forward to error handler
app.use(function (req, res, next) {
var err = new Error(‘Not Found‘);
err.status = 404;
next(err);
});
// error handlers
// development error handler
// will print stacktrace
if (app.get(‘env‘) === ‘development‘) {
app.use(function (err, req, res, next) {
res.status(err.status || 500);
res.render(‘error‘, {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function (err, req, res, next) {
res.status(err.status || 500);
res.render(‘error‘, {
message: err.message,
error: {}
});
});
module.exports = app;
index.js
var crypto = require(‘crypto‘),
User = require(‘../models/user.js‘);
module.exports = function (app) {
app.get(‘/‘, function (req, res) {
res.render(‘index‘, {title: ‘主页‘});
});
app.get(‘/reg‘, function (req, res) {
res.render(‘reg‘, {title: ‘注册‘});
});
app.get(‘/login‘, function (req, res) {
res.render(‘login‘, {title: ‘登录‘});
});
app.post(‘/login‘, function (req, res) {
});
app.get(‘/post‘, function (req, res) {
res.render(‘post‘, {title: ‘发表‘});
});
app.post(‘/post‘, function (req, res) {
});
app.get(‘/logout‘, function (req, res) {
});
app.post(‘/reg‘, function (req, res) {
var name = req.body.name,
password = req.body.password,
password_re = req.body[‘password-repeat‘];
//检验用户两次输入的密码是否一致
if (password_re != password) {
req.flash(‘error‘, ‘两次输入的密码不一致!‘);
return res.redirect(‘/reg‘);//返回注册页
}
//生成密码的 md5 值
var md5 = crypto.createHash(‘md5‘),
password = md5.update(req.body.password).digest(‘hex‘);
var newUser = new User({
name: name,
password: password,
email: req.body.email
});
//检查用户名是否已经存在
User.get(newUser.name, function (err, user) {
if (err) {
req.flash(‘error‘, err);
return res.redirect(‘/‘);
}
if (user) {
req.flash(‘error‘, ‘用户已存在!‘);
return res.redirect(‘/reg‘);//返回注册页
}
//如果不存在则新增用户
newUser.save(function (err, user) {
if (err) {
req.flash(‘error‘, err);
return res.redirect(‘/reg‘);//注册失败返回主册页
}
req.session.user = user;//用户信息存入 session
req.flash(‘success‘, ‘注册成功!‘);
res.redirect(‘/‘);//注册成功后返回主页
});
});
});
};
setting.js (根目录)
/**
* Created by Administrator on 2015/3/31.
*/
module.exports = {
cookieSecret: ‘myblog‘,
db: ‘blog‘,
host: ‘localhost‘,
port: 27017
};
db.js (models
/**
* Created by Administrator on 2015/3/31.
*/
var settings = require(‘../settings‘),
Db = require(‘mongodb‘).Db,
Connection = require(‘mongodb‘).Connection,
Server = require(‘mongodb‘).Server;
module.exports = new Db(settings.db, new Server(settings.host, settings.port),
{safe: true});
user.js(models)
/**
* Created by Administrator on 2015/3/31.
*/
var mongodb = require(‘./db‘);
function User(user) {
this.name = user.name;
this.password = user.password;
this.email = user.email;
};
module.exports = User;
//存储用户信息
User.prototype.save = function(callback) {
//要存入数据库的用户文档
var user = {
name: this.name,
password: this.password,
email: this.email
};
//打开数据库
mongodb.open(function (err, db) {
if (err) {
return callback(err);//错误，返回 err 信息
}
//读取 users 集合
db.collection(‘users‘, function (err, collection) {
if (err) {
mongodb.close();
return callback(err);//错误，返回 err 信息
}
//将用户数据插入 users 集合
collection.insert(user, {
safe: true
}, function (err, user) {
mongodb.close();
if (err) {
return callback(err);//错误，返回 err 信息
}
callback(null, user[0]);//成功！err 为 null，并返回存储后的用户文档
});
});
});
};
//读取用户信息
User.get = function(name, callback) {
//打开数据库
mongodb.open(function (err, db) {
if (err) {
return callback(err);//错误，返回 err 信息
}
//读取 users 集合
db.collection(‘users‘, function (err, collection) {
if (err) {
mongodb.close();
return callback(err);//错误，返回 err 信息
}
//查找用户名（name键）值为 name 一个文档
collection.findOne({
name: name
}, function (err, user) {
mongodb.close();
if (err) {
return callback(err);//失败！返回 err 信息
}
callback(null, user);//成功！返回查询的用户信息
});
});
});
};
)
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原文地址：http://www.cnblogs.com/lihaozhou/p/4385494.html
