Go Middlewares

middleware.go

package middleware

import (
	"net/http"
	"strings"
)

func Method(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method == http.MethodPost {
			switch strings.ToLower(r.PostFormValue("_method")) {
			case "put":
				r.Method = http.MethodPut
			case "patch":
				r.Method = http.MethodPatch
			case "delete":
				r.Method = http.MethodDelete
			default:
			}
		}
		next.ServeHTTP(w, r)
	})
}

mux := http.NewServeMux()
mux.Handle("POST /", func(w http.ResponseWriter, r *http.Request) {
  w.Write([]byte(r.Method))
})
mux.Handle("PUT /", func(w http.ResponseWriter, r *http.Request) {
  w.Write([]byte(r.Method))
})

var handler http.Handler = mux