app.js

var express = require('express');
var bodyParser = require('body-parser');
var session = require('express-session');

var mongoose = require('mongoose');
mongoose.Promise = global.Promise;
global.db = mongoose.connect('mongodb://localhost:27017/mediumReact', { useMongoClient: true });
global.dbHandle = require('./models/haddledb.js');
global.user = require('./models/user.js');

var routes = require('./routes/index');
var app = express();
//body-parser 解析json格式数据
app.use(bodyParser.json());
//此项必须在 bodyParser.json 下面,为参数编码
app.use(bodyParser.urlencoded({
    extended: true
}));


//nodeJs模板语言，选用ejs，如下配置可正常使用.html文件作为入口
app.engine('.html', require('ejs').__express);
//change the template main catelog
app.set('views', __dirname + '/src');
app.set('view engine', 'html')

var isDev = process.env.NODE_ENV !== 'production';

if (isDev) {
    //require('core-js/fn/object/assign');

    const webpack = require('webpack');
    const webpackDevMiddleware = require('webpack-dev-middleware');
    const webpackHotMiddleware = require('webpack-hot-middleware');
    const config = require('./webpack.config');

    const compiler = webpack(config);

    app.use(webpackDevMiddleware(compiler, {
        publicPath: config.output.publicPath,
        noInfo: true,
        stats: {
            colors: true
        }
    }));
    app.use(webpackHotMiddleware(compiler))
}

app.use(session({
    secret: 'guo random string', // 建议使用 128 个字符的随机字符串
    resave: true,
    saveUninitialized: true,
    cookie: { maxAge: 60 * 1000 }
}));

app.use(express.static(__dirname + '/public'));

app.use('/', routes);

app.listen(3000, function() {
    console.log("runing")
})