//app.js

//依赖

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 app = express();//创建express app

// 设置视图目录，使用ejs做模板引擎

app.set('views', path.join(__dirname, 'views'));

app.set('view engine', 'ejs');

// uncomment after placing your favicon in /public

//app.use(favicon(__dirname + '/public/favicon.ico'));

app.use(logger('dev'));//开发环境下使用，显示日志

//解析请求

app.use(bodyParser.json());

app.use(bodyParser.urlencoded({ extended: false }));

//解析cookie

app.use(cookieParser());

//设置public为静态目录

app.use(express.static(path.join(__dirname, 'public')));

//对/ 和 /users使用路由

app.use('/', routes);

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

//

app.use(function(req, res, next) {

    var err = new Error('Not Found');

    err.status = 404;

    next(err);

});

// 设置开发环境下错误处理

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

        });

    });

}

//设置生产环境下错误处理

app.use(function(err, req, res, next) {

    res.status(err.status || 500);

    res.render('error', {

        message: err.message,

        error: {}

    });

});

module.exports = app;