app.js

const PROD = process.env.NODE_ENV === 'production';   // 是否生产环境
const MOCK = process.env.NODE_ENV === 'mock';         // 是否mock模式
const path = require('path');
const Koa = require('koa');
const config = require('config');
const serve = require('koa-static');
const tplSetting = require('./lib/tplSetting.js');
const render = require('./lib/render.js');
const router = require('./backend/backendRouter.js');
const mock = require('./lib/mock.js');
const KWM = require('koa-webpack-middleware');
const favicon = require('koa-favicon');
const chalk = require('chalk');
const koaBody = require('koa-body');
const multer = require('koa-multer');
const connectDB = MOCK ? '' : require('./lib/connectDB')();

const devMiddleware = KWM.devMiddleware;
const hotMiddleware = KWM.hotMiddleware;
const app = new Koa();
const port = config.get('port');
const publicPath = config.get('publicPath');

// hot reload
if (!PROD) {
    const webpack = require('webpack');
    const webpackConfig = require('./webpack.config');
    const compile = webpack(webpackConfig);
    app.use(devMiddleware(compile, {
        noInfo: true,
        publicPath
    }));
    app.use(hotMiddleware(compile));
}

// koa-ejs参数设置
tplSetting(app, __dirname);

// favicon
app.use(favicon(path.join(__dirname, 'favicon.ico')));

// 静态资源
app.use(serve(path.join(__dirname, publicPath)));

// 请求体解析
app.use(koaBody({ multipart: true }));

// 模板渲染
app.use(render);

if (MOCK) {
    // 假数据
    app.use(mock);
} else {
    // 路由
    app.use(router.routes());
}

app.listen(port);

app.on('error', (err) => {
    console.error('server error:', err);
});