go__socialnetwork/ch1/ex1/ex1_helloworld.go

package main

import (
	"net/http"
	"encoding/json"
	"fmt"
)

type API struct {
	Message string "json:message"
}

func main() {
	http.HandleFunc("/api", func(w http.ResponseWriter, r *http.Request) {
		message := API{Message:"Hello, world"}
		output, err := json.Marshal(message)
		if err != nil {
			fmt.Println("Something went wrong", err)
		}
		fmt.Fprintf(w, string(output))
	});

	http.ListenAndServe(":8080", nil)
}