nethttp/client.go
func (h *ClientHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {

	// check for deniers, if at least one of them return true
	// for this specific request, then skip the whole cache
	if !h.rule.Claim(r) {
		h.bodyHandler.ServeHTTP(w, r)
		return
	}

	uri := &uri.URIBuilder{}
	uri.ServerAddr(h.remoteHandlerURL).ClientURI(r.URL.RequestURI()).ClientMethod(r.Method)

	// set the full url here because below we have other issues, probably net/http bugs
	request, err := http.NewRequest(methodGet, uri.String(), nil)
	if err != nil {
		//// println("error when requesting to the remote service: " + err.Error())
		// somehing very bad happens, just execute the user's handler and return
		h.bodyHandler.ServeHTTP(w, r)
		return
	}

	// println("GET Do to the remote cache service with the url: " + request.URL.String())
	response, err := Client.Do(request)

	if err != nil || response.StatusCode == cfg.FailStatus {
		// if not found on cache, then execute the handler and save the cache to the remote server
		recorder := AcquireResponseRecorder(w)
		defer ReleaseResponseRecorder(recorder)

		h.bodyHandler.ServeHTTP(recorder, r)

		// check if it's a valid response, if it's not then just return.
		if !h.rule.Valid(recorder, r) {
			return
		}
		// save to the remote cache
		// we re-create the request for any case

		body := recorder.Body()[0:]
		if len(body) == 0 {
			//// println("Request: len body is zero, do nothing")
			return
		}
		uri.StatusCode(recorder.StatusCode())
		uri.Lifetime(h.life)
		uri.ContentType(recorder.ContentType())

		request, err = http.NewRequest(methodPost, uri.String(), bytes.NewBuffer(body)) // yes new buffer every time

		// println("POST Do to the remote cache service with the url: " + request.URL.String())
		if err != nil {
			//// println("Request: error on method Post of request to the remote: " + err.Error())
			return
		}
		// go Client.Do(request)
		Client.Do(request)
	} else {
		// get the status code , content type and the write the response body
		w.Header().Set(cfg.ContentTypeHeader, response.Header.Get(cfg.ContentTypeHeader))
		w.WriteHeader(response.StatusCode)
		responseBody, err := ioutil.ReadAll(response.Body)
		response.Body.Close()
		if err != nil {
			return
		}
		w.Write(responseBody)

	}
}
func (h *ClientHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {

	// check for deniers, if at least one of them return true
	// for this specific request, then skip the whole cache
	if !h.rule.Claim(r) {
		h.bodyHandler.ServeHTTP(w, r)
		return
	}

	uri := &uri.URIBuilder{}
	uri.ServerAddr(h.remoteHandlerURL).ClientURI(r.URL.RequestURI()).ClientMethod(r.Method)

	// set the full url here because below we have other issues, probably net/http bugs
	request, err := http.NewRequest(methodGet, uri.String(), nil)
	if err != nil {
		//// println("error when requesting to the remote service: " + err.Error())
		// somehing very bad happens, just execute the user's handler and return
		h.bodyHandler.ServeHTTP(w, r)
		return
	}

	// println("GET Do to the remote cache service with the url: " + request.URL.String())
	response, err := Client.Do(request)

	if err != nil || response.StatusCode == cfg.FailStatus {
		// if not found on cache, then execute the handler and save the cache to the remote server
		recorder := AcquireResponseRecorder(w)
		defer ReleaseResponseRecorder(recorder)

		h.bodyHandler.ServeHTTP(recorder, r)

		// check if it's a valid response, if it's not then just return.
		if !h.rule.Valid(recorder, r) {
			return
		}
		// save to the remote cache
		// we re-create the request for any case

		body := recorder.Body()[0:]
		if len(body) == 0 {
			//// println("Request: len body is zero, do nothing")
			return
		}
		uri.StatusCode(recorder.StatusCode())
		uri.Lifetime(h.life)
		uri.ContentType(recorder.ContentType())

		request, err = http.NewRequest(methodPost, uri.String(), bytes.NewBuffer(body)) // yes new buffer every time

		// println("POST Do to the remote cache service with the url: " + request.URL.String())
		if err != nil {
			//// println("Request: error on method Post of request to the remote: " + err.Error())
			return
		}
		// go Client.Do(request)
		Client.Do(request)
	} else {
		// get the status code , content type and the write the response body
		w.Header().Set(cfg.ContentTypeHeader, response.Header.Get(cfg.ContentTypeHeader))
		w.WriteHeader(response.StatusCode)
		responseBody, err := ioutil.ReadAll(response.Body)
		response.Body.Close()
		if err != nil {
			return
		}
		w.Write(responseBody)

	}
}
// ServeHTTP , or remote cache client whatever you like, it's the client-side function of the ServeHTTP
// sends a request to the server-side remote cache Service and sends the cached response to the frontend client
// it is used only when you achieved something like horizontal scaling (separate machines)
// look ../remote/remote.ServeHTTP for more
//
// if cache din't find then it sends a POST request and save the bodyHandler's body to the remote cache.
//
// It takes 3 parameters
// the first is the remote address (it's the address you started your http server which handled by the Service.ServeHTTP)
// the second is the handler (or the mux) you want to cache
// and the  third is the, optionally, cache expiration,
// which is used to set cache duration of this specific cache entry to the remote cache service
// if <=minimumAllowedCacheDuration then the server will try to parse from "cache-control" header
//
// client-side function