使用session插件并且实现登录验证

var express = require(‘express‘);
var cookieParser = require(‘cookie-parser‘);
var bodyParser = require(‘body-parser‘);
var session = require(‘express-session‘);
var swig = require(‘swig‘);
var user = require(‘./modules/user‘);
var app = express();

//设置swig模板方法;
app.engine(‘html‘, swig.renderFile);
app.set(‘view engine‘, ‘html‘);
app.set(‘views‘, __dirname + ‘/views‘);

//console.log(user)
app.use(session({
  secret: ‘hubwiz app‘, //secret的值建议使用随机字符串
  saveUninitialized: true,
  cookie: {
    secure: false
  } // 过期时间（毫秒）
}));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(cookieParser());

app.get(‘/‘, function (req, res) {
  if (req.session.sign) {//检查用户是否已经登录，如果已登录展现的页面
    console.log(req.session);//打印session的值
    res.send("已登录");
  } else {//否则展示index页面
    res.render(‘index‘, {title: ‘index‘});
  }
});
app.get(‘/out‘,function(req,res){
  req.session.destroy();
  res.send("out");
});
app.post(‘/login‘, function (req, res) {
  //登录的数据和user.json中的数据进行对比
  if (req.body.password != user.hubwiz.password || req.body.user != user.hubwiz.name ) {
    res.end(‘sign failure‘);
  } else {
    req.session.sign = true;
    req.session.name = user.hubwiz.name;
    res.send(‘welecome <strong>‘ + req.session.name + ‘</strong>，<a href="/out">登出</a>‘);
    console.log(‘成功登录‘);
  }
});

app.get("/app",log,function(req,res){
  res.send("登录app");
});

//登录验证函数;
function log(req,res,next){
  console.log(‘通过log验证‘);
  if(req.session.sign){
    return next();
  }else{
    res.redirect(‘/‘);
    return null;
  }
}

app.listen(8080);