main.go

package main

import (
	"encoding/json"
	"log"
	"net/http"

	"github.com/gorilla/mux"
)

var f finder

func findCountry(w http.ResponseWriter, r *http.Request) {
	params := mux.Vars(r)
	country, err := f.FindByName(params["id"])

	if err != nil {
		http.Error(w, "Invalid Country", http.StatusNotFound)

		log.Printf("unable to find country with name: %s", params["id"])

		return
	}

	w.Header().Set("Content-Type", "application/json")

	w.WriteHeader(http.StatusFound)

	if err := json.NewEncoder(w).Encode(country); err != nil {
		log.Printf("error encoding: %v", err)
	}
}

func main() {
	r := mux.NewRouter()

	r.PathPrefix("/").Handler(http.FileServer(http.Dir("site")))

	r.HandleFunc("/country/{id}", findCountry).Methods("GET")

	if err := http.ListenAndServe(":3000", r); err != nil {
		log.Fatal(err)
	}
}

type finder interface {
	FindByName(string) (interface{}, error)
}