Just some personal notes regarding http routing in golang

http_routing.go

package main

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

	router "github.com/julienschmidt/httprouter"
)

func httprouter() {
	handler := router.New()
	handler.GET("/", func(writer http.ResponseWriter, request *http.Request, _ router.Params) {
		io.WriteString(writer, "BOOM")
	})
	// handler.GET("/*var", func(writer http.ResponseWriter, request *http.Request, _ router.Params) {
	// 	io.WriteString(writer, "You lookin' for this?")
	// })
	handler.GET("/hi%20there", func(writer http.ResponseWriter, request *http.Request, _ router.Params) {
		io.WriteString(writer, "Escaped")
	})
	log.Fatal(http.ListenAndServe(":8080", handler))
}

type muxHandler struct{}
func (muxHandler) ServeHTTP (writer http.ResponseWriter, request *http.Request) {
	io.WriteString(writer, "Hi there")
	fmt.Printf("%#v\n\n", *request)
	fmt.Printf("%#v\n\n", *request.URL)
}
func servemux() {
	mux := http.NewServeMux()
	mux.Handle("/hi/there", muxHandler{})
	http.ListenAndServe(":8000", mux)
}

func servemux_better() {
	mux := http.NewServeMux()
	handler := func(writer http.ResponseWriter, request *http.Request) {
		io.WriteString(writer, "Hi there")
		fmt.Printf("%#v\n\n", *request)
		fmt.Printf("%#v\n\n", *request.URL)
	}
	// mux.Handle("/hi/there", handler)		// ERROR: doesn't implement ServeHTTP
	mux.Handle("/hi/there", http.HandlerFunc(handler))	// <-- works!
	http.ListenAndServe(":8000", mux)
}

func servemux_best() {
	mux := http.NewServeMux()
	mux.HandleFunc("/hi/there", func(writer http.ResponseWriter, request *http.Request) {
		io.WriteString(writer, "Hi there")
		fmt.Printf("%#v\n\n", *request)
		fmt.Printf("%#v\n\n", *request.URL)
	})
	http.ListenAndServe(":8000", mux)
}

func main() {
	// httprouter()
	// servemux()
	// servemux_better()
	// servemux_best()
	http.ListenAndServe(":8000", muxHandler{})	// muxHandler{} is already an http.Handler, since it has ServeHTTP() method.
}