app.js

'use strict'
// Node babel source map support
require("source-map-support").install()
// Javascript require hook
require('babel-core/register', {ignore: /.css$/});
require('babel-polyfill');
// Image required hook
require('asset-require-hook')({
  extensions: [
    'jpg', 'png', 'gif', 'webp'
  ],
  name: '/dist/img/[name].[ext]',
  limit: 2000
});
//load common config
const common = require('./common.json');

let path = require('path');

//Css modules hook
require('css-modules-require-hook')({generateScopedName: '[name]_[local]_[hash:base64:3]', camelCase: true, rootDir: './client/'});

let
  //加载koa主模块
  koa = require('koa'),
  //加载koa路由模块
  router = require('koa-router')(),
  //加载koa日记模块
  logger = require('koa-logger'),
  serve = require('koa-static2'),
  compress = require('koa-compress'),
  bodyParser = require('koa-bodyparser'),
  json = require('koa-json'),
  passport = require('koa-passport'),
  session = require('koa-session'),
  routers = require('./server/route/router.js');

//初始化koa对象
const App = () => {
  //创建koa服务器应用
  let app = new koa();

  app.keys = ['listenlite-aemoe'];
  //使用logger日志库
  app.use(logger());
  //使用gzip压缩
  app.use(compress({
    filter: function(content_type) {
      return /text/i.test(content_type)
    },
    threshold: 2048,
    flush: require('zlib').Z_SYNC_FLUSH
  }))
  //get request body
  app.use(bodyParser());
  //send request json
  app.use(json({pretty: false}));
  //use static dir
  app.use(serve("", __dirname + "/public"));
  //session
  const CONFIG = {
    key: 'listenlite:sess',
    maxAge: 86400000,
    overwrite: true,
    httpOnly: true,
    signed: true
  };
  app.use(session(CONFIG, app));
  // authentication
  require('./server/auth/passport.js');
  //passport
  app.use(passport.initialize())
  app.use(passport.session())
  //路由
  app.use(routers)

  return app;
};

//Creat koa server and listen
var creatServer = () => {
  const app = App();
  app.listen(common.serverPort, function(err) {
    if (err) {
      console.log(err);
    }
    console.log('Listening at localhost:' + common.serverPort);
  });
};

//调用创建koa服务器方法
creatServer();