nodejs +express.cookies.session+mongodb存储 实现登录状态会话

var createError = require(‘http-errors’);
var express = require(‘express’);
var path = require(‘path’);
var cookieParser = require(‘cookie-parser’);
var session = require(‘express-session’);//express 4.0以上将session 和cookie中间件分开
var logger = require(‘morgan’);
var MongoStore = require(‘connect-mongo’)(session);
var indexRouter = require(’./routes/index’);
var usersRouter = require(’./routes/users’);
var app = express();

// view engine setup
app.set(‘views’, path.join(__dirname, ‘views’));
app.set(‘view engine’, ‘ejs’);

app.use(logger(‘dev’));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser("%@yqf$*/!±"));
app.use(express.static(path.join(__dirname, ‘public’)));
/**

• @package cookie-session
• secet:"" 签名(伪加密)
• resave :
• saveUninitialized:true;
• **/
  //配置session中间件
  app.use(session({
  secret:“yqf”,//签名(伪加密 随便写，使用自带方法加密)
  name:“session_id”,//保存在本地cookies的名字 默认为connect_sid
  resave:false,//true ：强制保存session 即使没变化 false:不强制保存
  saveUninitialized:true,//强制将未初始化的session存储
  rolling:true,//有操作重新计算时间
  cookie:{
  maxAge:50000,
  httpOnly:true
  },
  store:new MongoStore({
  secret: ‘yqf’,//签名
  url:“mongodb://127.0.0.1:27017/student”,//数据库地址
  touchAfter:24*5000//在指定时间内,只要session内容不变，就会延迟更新通过这样做，设置touchAfter: 24 * 3600你说会话只在24小时内更新一次，无论发生多少请求（除了那些改变会话数据的东西）
  })

}));
//路由设置
app.use(’/’, indexRouter);
app.use(’/users’, usersRouter);
/***

• @package cookie
• domain:".yqf.com" 二级域名 cookies 共享
• path :url 指定目录下使用cookis
• httponly:true 只能在服务器端设置cookies 客户端无法通过js获取cookies的值 document.cookies无法获取值
• signed 设置cookieParser(“加密数据标识”)
• */
  app.get(’/getCookies’,function (req,res) {
  console.log(req.signedCookies.citys);
  res.send(“你浏览过的城市为-”+req.signedCookies.citys);
  });
  app.get(’/setCookies’,function (req,res) {
  //获取数据
  var city = req.query.city;
  // 获取缓存Cookies数据
  var citys = req.signedCookies.citys;
  // 设置cookis
  if(citys){//判断是否存在Cookies
  var reSign = false;
  citys.forEach(function (value,index) {
  if(value==city){//判断是否重复
  reSign = true;
  return;
  }
  });
  if (!reSign) {//如果Cookies不重复，数据追加
  citys.push(city);
  }
  }else {
  //判断是否为第一次缓存Cookies
  citys = [];
  citys.push(city);
  }
  res.cookie(“citys”,citys,{maxAge:5000, domain:’.yqf.com’,httpOnly:true,signed:true});
  res.send(“你浏览过的城市为——”+city);

});
app.get(’/index’,function (req,res) {
console.log(req.session.userName);
if(req.session.userName){
res.send(“欢迎再次回来”+req.session.userName);
}else{
res.send(“未登录”);
}

});
//登录
app.get(’/login’,function (req,res) {
// 设置session 信息
req.session.userName = “yqf”;
res.send(“登录成功”);
});
//退出 销毁session
app.use(’/logOut’,function (req,res) {
req.session.cookie.maxAge = 0;//销毁session登录信息
res.send(“退出登录”)
});
// catch 404 and forward to error handler
// app.use(function(req, res, next) {
// next(createError(404));
// });

// error handler
app.use(function(err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get(‘env’) === ‘development’ ? err : {};

// render the error page
res.status(err.status || 500);
res.render(‘error’);
});

app.listen(8080,function () {
console.log(“port is 8080”);
})
// module.exports = app;