filter

type CounterFilter struct {
	QPSCount
	CountAll int
	Lock     sync.Mutex
}

type Filter interface {
	FilterHttpRouter(pattern string, h httprouter.Handle) httprouter.Handle
	FilterHttpHandlerFunc(pattern string, handler func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request)
}

type QPSCount struct {
	Timestamp  int64
	QPS        int
	MaxHistory int
}

type RateLimitFilter struct {
	Interval time.Duration
	MaxCount int
	Lock     sync.Mutex
	ReqCount int
}