简单GO的http server样例

package main

import (
	"fmt"
	"io"
	"log"
	"net/http"
	"os"
	"strings"
)

func main(){
	http.HandleFunc("/healthz",healthz)
	err := http.ListenAndServe(":8101",nil)
	if err!=nil{
		log.Fatal(err)
	}
}

func healthz(res http.ResponseWriter,req *http.Request){
	//请求IP
	reqAddr := req.RemoteAddr
	reqIp := strings.Split(reqAddr,":")[0]
	fmt.Println("请求IP:",reqIp)

	//返回Header
	resHeader := res.Header()
	for k,v := range req.Header{
		//设置返回Header内容
		resHeader.Set(k,getStr(v))
	}

	//设置环境变量
	version := "VERSION"
	os.Setenv(version,"v1.0")
	//设置环境变量VERSION至返回Header
	resHeader.Set(version,os.Getenv(version))

	//设置返回body
	io.WriteString(res,"200")
}

func getStr(strSlice []string)string{
	str := ""
	for _,s := range strSlice{
		str = str+","+s
	}
	return str
}