go-rest-1.go

package main

import (
	"fmt"
	"log"
	"net/http"
	"reflect"
	"strings"
)

type Handler struct {}

func (f *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	// A special case for the index
	path := r.URL.Path
	if path == "/" {
		path = "/index"
	}

	// we need to do some processing to turn the url into a callable name
	// after a POST request to /user/login, call_name will be "User_login_POST"	
	call_name := strings.ToUpper(path[1:2]) // capitalize the first letter .. we can only call exported methods
	call_name += strings.Replace(strings.ToLower(path[2:]), "/", "_", -1)
	call_name += "_" + r.Method

	method := reflect.ValueOf(f).MethodByName(call_name)
	if method.IsValid() {
		method.Call([]reflect.Value{reflect.ValueOf(w), reflect.ValueOf(r)})
	} else {
		// send off a 404 error here.
		w.WriteHeader(http.StatusNotFound)
	}
}

func (h *Handler) Index_GET(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "Index")
}

func (h *Handler) Pagetwo_GET(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "GET Page Two!")
}

func (h *Handler) Pagetwo_POST(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "POST Page Two!")
}

func main() {
	s := &http.Server{
		Addr: ":2056",
		Handler: new(Handler),
	}

	log.Fatal(s.ListenAndServe())
}