caller-app.go

package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
)

func HelloServer(w http.ResponseWriter, r *http.Request) {
	resp, err := http.Get("http://localhost:8080")
	if err != nil {
		log.Fatalln(err)
	}

	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		log.Fatalln(err)
	}

	log.Println(string(body))
	fmt.Fprintf(w, string(body))
}

func main() {
	http.HandleFunc("/", HelloServer)
	http.ListenAndServe(":8081", nil)
}