Example http.Handlers for client endpoints. From https://github.com/AgencyPMG/go-from-scratch

clients_api_handler.go

//getClient retrieves and sends a single Client.
func (a *API) getClient(w http.ResponseWriter, r *http.Request) {
	client, ok := a.getClientEntity(w, r)
	if !ok {
		return
	}

	a.sendData(w, client, http.StatusOK)
}

//createClient attempts to create a new Client from a dto.CreateClient form
//and executing a clientcmd.CreateClientCommand.
func (a *API) createClient(w http.ResponseWriter, r *http.Request) {
	f := &dto.CreateClient{}
	if ok := a.parseForm(w, r, f); !ok {
		return
	}

	command := &clientcmd.CreateClientCommand{
		Name: f.Name,
	}

	client, err := a.Bus.ExecuteContext(r.Context(), command)
	a.clientCommandResponse(w, client, err, http.StatusCreated)
}