package main

import (
	"fmt"
	"net/http"
)

// Engine 定义一个结构体
type Engine struct {
}

// 实现Handler的ServerHTTP方法
func (e *Engine) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	switch r.RequestURI {
	case "/":
		fmt.Fprint(w, "hello handler-basic")
	case "/web":
		for k, v := range r.Header {
			fmt.Fprintln(w, k, "-->", v)
		}
	}
}

func main() {
	engine := new(Engine)
	if err := http.ListenAndServe(":9000", engine); err != nil {
		panic(err)
	}
}