How to use koa - 10 common examples

//   log4js.info(meta);
//   await next();
//   return;
// });

app.use(render(__dirname + '/view', {
  map: {
    html: 'underscore'
  },
  extension: 'ejs'
}));

app.use(router.routes())
  .use(router.allowedMethods());

app.use(serveSass({
  mountAt: '/static/css',
  src: './static/scss',
  dest: './static/css',
  importPaths: ['./node_modules']
}))

app.use(serveStatic('./static', '/static'));

sequelize.rajio.sync()
sequelize.rajioInfo.sync()

gc.init()
info.init()

app.listen(4290);
log4js.info('Serving at http://localhost:4290');

referrerPolicy,
} from 'koa-helmet';
import logger from 'koa-logger';
import mount from 'koa-mount';
import enforceHttps from 'koa-sslify';
import Koa from 'koa';
import bugsnag from 'bugsnag';
import onerror from 'koa-onerror';
import updates from './utils/updates';

import auth from './auth';
import api from './api';
import emails from './emails';
import routes from './routes';

const app = new Koa();

app.use(compress());

if (process.env.NODE_ENV === 'development') {
  /* eslint-disable global-require */
  const convert = require('koa-convert');
  const webpack = require('webpack');
  const devMiddleware = require('koa-webpack-dev-middleware');
  const hotMiddleware = require('koa-webpack-hot-middleware');
  const config = require('../webpack.config.dev');
  const compile = webpack(config);
  /* eslint-enable global-require */

  app.use(
    convert(
      devMiddleware(compile, {

)
Dispatcher.register(
  'CheckIn',
  CommandHandlers.makeCheckInHandler(store)
)
Dispatcher.register(
  'Remove',
  CommandHandlers.makeRemoveHandler(store)
)
Dispatcher.register(
  'Deactivate',
  CommandHandlers.makeDeactivateHandler(store)
)

// Set up a Koa app to expose our awesome app to the world.
const app = new Koa()
app.use(bodyParser())
app.use(async (ctx: any, next: any) => {
  try {
    await next()
  } catch (err) {
    ctx.status = 500
    ctx.body = {
      error: err.message
    }
    logger.error('Error in request', err)
  }
})

const controller = {
  // Writes
  async createItem(ctx: any) {

_createKoa() {
    const koa = new Koa();

    koa.use(
      logger(message => {
        debug(message);
      })
    );
    koa.use(jsonError());
    koa.use(cors({maxAge: 900})); // 15 minutes
    koa.use(bodyParser({enableTypes: ['json'], jsonLimit: '8mb'}));

    koa.use(async ctx => {
      if (ctx.method !== 'POST') {
        throw new Error('Invalid HTTP request');
      }

      const layer = await this._layerCreator();

_startServer() {
        var args = this.args;
        var {port, host} = this.args;
        var app = koa();
        routes({app, args});

        app.listen(Number(port), host);

        var clientConnect = this._clientConnect.bind(this);
        var clientDisconnect = this._clientDisconnect.bind(this);
        // Connect flux to socket.io channel
        app.io.use(function *(next) {
            clientConnect(this.socket);
            yield* next;
            clientDisconnect(this.socket);
        });
    }

import koa from 'koa.io';
import http from 'http';
import routes from './routes';
import Cli from './components/cli';
import TuiReact from './lib/tui-react';
import env from '../shared/env';
import ServerFlux from './flux';

var app = koa();

routes(app);

app.listen(env.PORT);

// Connect flux to socket.io channel
var flux = new ServerFlux();
app.io.use(function *(next) {
    // on connect
    flux.connect(this.socket);
    sendWindowSize();
    yield* next;
    // on disconnect
    flux.disconnect(this.socket);
});

export default function createViews(args) {
    var app = koa();

// Add jade rendering
    app.use(views(__dirname, {
        cache: true,
        default: 'jade'
    }));

    app.use(router(app));

    app.get('/', function *() {
        yield this.render('index', {
            title: 'mc',
            env: {
                NODE_ENV: args.nodeEnv
            }
        });

function Kona(options) {

  // call the koa constructor here
  Koa.call(this);

  options = options || {};

  // setup kona root and application paths / helpers
  this.setupPaths(options);

  // setup env vars, logger, needed modules
  this.setupEnvironment(options);

  this.loadMixins(this.root.join('package.json'));
}

/*!
 * Moajs Middle
 * Copyright(c) 2015-2019 Alfred Sang 
 * MIT Licensed
 */

const api = require('koa.res.api')

// 检查用户会话
module.exports = api()

'use strict';
const requestProto = require('koa/lib/request');
const responseProto = require('koa/lib/response');
const contextProto = require('koa/lib/context');
const applicationProto = require('koa/lib/application').prototype;
const completeAssign = require('complete-assign');
const Loader = require('../core/Loader');
const baseClassProto = require('../core/base/BaseClass').prototype;

class AstroboyExtendLoader extends Loader {
  load() {
    // application extend
    this.globDirs(this.config.applicationPattern, entries => {
      entries.forEach(entry => {
        completeAssign(applicationProto, require(entry));
      });
    });

    // context extend
    this.globDirs(this.config.contextPattern, entries => {
      entries.forEach(entry => {