如何用 Go 语言写出好用的 Http 中间件？

func HomeRouter(w http.ResponseWriter, r *http.Request) {    // Handle your request}
// ...// Some where when installing Hanlderchain := MiddlewareHandlerFunc(HomeRouter).  Intercept(NewElapsedTimeInterceptor()).  Intercept(NewRequestIdInterceptor())
// Install it like regular HttpHandlermux.Path("/home").HandlerFunc(http.HandlerFunc(chain))

/*Copyright (c) 2019 DoorDashPermission is hereby granted, free of charge, to any person obtaining a copyof this software and associated documentation files (the "Software"), to dealin the Software without restriction, including without limitation the rightsto use, copy, modify, merge, publish, distribute, sublicense, and/or sellcopies of the Software, and to permit persons to whom the Software isfurnished to do so, subject to the following conditions:The above copyright notice and this permission notice shall be included in allcopies or substantial portions of the Software.THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS ORIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THEAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHERLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THESOFTWARE.*/package middleware
import "net/http"
// MiddlewareInterceptor intercepts an HTTP handler invocation, it is passed both response writer and request// which after interception can be passed onto the handler function.type MiddlewareInterceptor func(http.ResponseWriter, *http.Request, http.HandlerFunc)
// MiddlewareHandlerFunc builds on top of http.HandlerFunc, and exposes API to intercept with MiddlewareInterceptor.// This allows building complex long chains without complicated struct manipulationtype MiddlewareHandlerFunc http.HandlerFunc

// Intercept returns back a continuation that will call install middleware to intercept// the continuation call.func (cont MiddlewareHandlerFunc) Intercept(mw MiddlewareInterceptor) MiddlewareHandlerFunc {  return func(writer http.ResponseWriter, request *http.Request) {    mw(writer, request, http.HandlerFunc(cont))  }}
// MiddlewareChain is a collection of interceptors that will be invoked in there index ordertype MiddlewareChain []MiddlewareInterceptor
// Handler allows hooking multiple middleware in single call.func (chain MiddlewareChain) Handler(handler http.HandlerFunc) http.Handler {  curr := MiddlewareHandlerFunc(handler)  for i := len(chain) - 1; i >= 0; i-- {    mw := chain[i]    curr = curr.Intercept(mw)  }
  return http.HandlerFunc(curr)}