node简易封装

import http from 'http';
import url from 'url';

class Rainbow {
  /**服务器实例 */
  server;
  /**服务器事件 */
  event = {
    GET: {},
    POST: {},
    PUT: {},
    DELETE: {},
  };
  constructor() {
    //初始化实例
    this.server = http.createServer((req, res) => {
      const pathname = url.parse(req.url).pathname;
      //首页的页面资源和图标需要特殊处理，这里只返回首页信息
      const homePage = ['/', '/favicon.ico'];
      res.writeHead(200, { 'Content-Type': 'text/html;charset="utf-8"' });
      switch (req.method) {
        case 'GET':
          if (homePage.includes(req.url)) {
            res.end(JSON.stringify({ code: 200, msg: '请求成功', data: { message: '我是首页' } }));
            return;
          }
          this.event['GET'][pathname](req, res);
          break;
        case 'POST':
          this.event['POST'][pathname](req, res);
          break;
        case 'PUT':
          this.event['PUT'][pathname](req, res);
          break;
        case 'DELETE':
          this.event['DELETE'][pathname](req, res);
          break;
        default:
          res.end('请求类型错误!');
      }
    });
  }
  //服务器监听函数
  listen(port, callback) {
    this.server.listen(port, callback());
  }
  get(path, callback) {
    this.event['GET'][path] = callback;
  }
  post(path, callback) {
    this.event['POST'][path] = callback;
  }
  put(path, callback) {
    this.event['PUT'][path] = callback;
  }
  delete(path, callback) {
    this.event['DELETE'][path] = callback;
  }
}

const server = new Rainbow();

server.get('/home', (req, res) => {
  res.end(JSON.stringify({ code: 200, msg: '请求成功', data: { message: '你好' } }));
});

server.listen(3000, () => {
  console.log('服务启动在http://localhost:3000端口上');
});