Gist: Go "path-method map" HTTP handler

A basic Go "http.Handler" implementation that map handlers to a path and method.

Last updated on: 2024-12-10

Here's an example of a `http.Handler implementation that maps paths and methods to handlers. It may be suitable for static / file-based websites.

type Map map[string]map[string]http.Handler

type MapHandler struct {
	notFoundhandler http.Handler
	endpoints       Map
}

func NewMapHandler(notFoundhandler http.Handler, endpoints Map) *MapHandler {
	return &MapHandler{notFoundhandler: notFoundhandler, endpoints: endpoints}
}

func (h *MapHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	endpoints, ok := h.endpoints[r.URL.Path]
	if !ok {
		h.notFoundhandler.ServeHTTP(w, r)
		return
	}
	endpoint, ok := endpoints[r.Method]
	if !ok {
		h.notFoundhandler.ServeHTTP(w, r)
		return
	}
	endpoint.ServeHTTP(w, r)
}