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 index = require('./routes/index');
// var users = require('./routes/users');
// var login = require('./routes/login');
// var home = require('./routes/home');
// var logout = require('./routes/logout');

// session
var session = require("express-session");
var MongoStore = require('connect-mongo')(session);
var flash = require('connect-flash');
var config = require('config-lite')(__dirname);
var routes = require('./routes');
var pkg = require('./package');
var winston = require('winston');
var expressWinston = require('express-winston');

var app = express();

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

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
// app.use(logger('dev'));
// app.use(bodyParser.json());
// app.use(bodyParser.urlencoded({ extended: false }));
// app.use(cookieParser());

// add session
// app.use(session({
//     secret: 'this is the secret for cookie',
//     resave: false,
//     saveUninitialized: true
// }));
// app.use(function (req, res, next) {
//     var url = req.originalUrl;
//     if (url != "/" && undefined == req.session.user) {
//         // res.send('<script>top.location.href="/login";</script>');　　　　　　//解决内嵌iframe时session拦截问题
//         // return;
//         res.redirect('/login');
//         return;
//       }
//     next();
// });
app.use(express.static(path.join(__dirname, 'public')));

// session 中间件
app.use(session({
  name: config.session.key,// 设置 cookie 中保存 session id 的字段名称
  secret: config.session.secret,// 通过设置 secret 来计算 hash 值并放在 cookie 中，使产生的 signedCookie 防篡改
  resave: true,// 强制更新 session
  saveUninitialized: false,// 设置为 false，强制创建一个 session，即使用户未登录
  cookie: {
    maxAge: config.session.maxAge// 过期时间，过期后 cookie 中的 session id 自动删除
  },
  store: new MongoStore({// 将 session 存储到 mongodb
    url: config.mongodb// mongodb 地址
  })
}));
// flash 中间件，用来显示通知
app.use(flash());
app.use(require('express-formidable')({
  uploadDir: path.join(__dirname, 'public/img'),// 上传文件目录
  keepExtensions: true// 保留后缀
}));

// 设置模板全局常量
app.locals.blog = {
  title: pkg.name,
  description: pkg.description
};

// 添加模板必需的三个变量
app.use(function (req, res, next) {
  res.locals.user = req.session.user;
  res.locals.success = req.flash('success').toString();
  res.locals.error = req.flash('error').toString();
  next();
});

// 路由
routes(app);

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

// app.use('/login', login);
// // app.use('/login', routes.doLogin);
// app.use('/logout', logout);
// app.use('/home', home);

// 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 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');
// });
// 错误请求的日志
app.use(expressWinston.errorLogger({
  transports: [
    new winston.transports.Console({
      json: true,
      colorize: true
    }),
    new winston.transports.File({
      filename: 'logs/error.log'
    })
  ]
}));

// error page
app.use(function (err, req, res, next) {
  res.render('error', {
    error: err
  });
});

module.exports = app;