SimpleRestAPI.go

package main

import(
	"log"
	"net/http"
	"github.com/gorilla/mux"
)

func get(w http.ResponseWriter, r *http.Request){
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusOK)  // set Status 200
	w.Write([]byte(`{"message": "get called"}`))
}

func post(w http.ResponseWriter, r *http.Request){
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusCreated)  // set Status 201
	w.Write([]byte(`{"message": "post called"}`))
}

func put(w http.ResponseWriter, r *http.Request){
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusAccepted)  // set Status 202
	w.Write([]byte(`{"message": "put called"}`))
}

func delete(w http.ResponseWriter, r *http.Request){
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusOK)  
	w.Write([]byte(`{"message": "delete called"}`))
}

func notFound(w http.ResponseWriter, r *http.Request){
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusNotFound)  // set 404
	w.Write([]byte(`{"message": "not found"}`))
}

func main() {
	r := mux.NewRouter()
	api := r.PathPrefix("/api/v1").Subrouter()
	api.HandleFunc("/", get).Methods(http.MethodGet)
	api.HandleFunc("/", post).Methods(http.MethodPost)
	api.HandleFunc("/", put).Methods(http.MethodPut)
	api.HandleFunc("/", delete).Methods(http.MethodDelete)
	api.HandleFunc("/", notFound)
	log.Fatal(http.ListenAndServe(":8000", r))
}