http - 如何使文件系统为http.Handler

Question

我想在http.Handler中包装一个文件系统。

type Handler func(ctx context.Context, w http.ResponseWriter, r *http.Request) error

func (a *App) Handle(verb, path string, handler Handler) {
        ...
        h := func(w http.ResponseWriter, r *http.Request) {
                ...
        }

        a.myRouter.HandleFunc(verb, path, h)
}

func (a *App) ServeHTTP(w http.ResponseWriter, r *http.Request) {
    a.myRouter.ServeHTTP(w, r)
}

func MYAPI(...) http.Handler {
        ...
        app.Handle("Get", "/files", http.StripPrefix(pathPrefix,       http.FileServer(root)))
        return app
}

api := http.Server{
        ...
        Handler:      MYAPI(),
}

该应用程序是我的自定义路由器，我定义了自己的http.Handler Handler。现在，如果我将此处理程序包装在fileSystem周围，应该如何对其进行编码？

Answer 1

您可以使用闭包:

func FromHTTPHandler(h http.Handler) Handler {
    return func(ctx context.Context, w http.ResponseWriter, r *http.Request) error {
        h.ServeHTTP(w, r)
        return nil
    }
}

// ...

app.Handle("Get", "/files", FromHTTPHandler(http.StripPrefix(pathPrefix, http.FileServer(root))))