Function Purge

context.go:112–130

Purge removes request data stored for longer than maxAge, in seconds. It returns the amount of requests removed. If maxAge <= 0, all request data is removed. This is only used for sanity check: in case context cleaning was not properly set some request data can be kept forever, consuming an increa

(maxAge int)

// amount of memory. In case this is detected, Purge() must be called
// periodically until the problem is fixed.
func Purge(maxAge int) int {
	mutex.Lock()
	count := 0
	if maxAge <= 0 {
		count = len(data)
		data = make(map[*http.Request]map[interface{}]interface{})
		datat = make(map[*http.Request]int64)
	} else {
		min := time.Now().Unix() - int64(maxAge)
		for r := range data {
			if datat[r] < min {
				clear(r)
				count++
			}
		}
	}
	mutex.Unlock()
	return count
}

// ClearHandler wraps an http.Handler and clears request values at the end
// of a request lifetime.