I was trying to get current HTTP connections in HTTP.Server. Internally
transport tracks it under connPerHostCount. However, I don't see a way of
getting this value.
I tried this:
type HTTPRequestMetrics struct {
activeConnections int64
next http.Handler
}
func HTTPRequestMetricsHandler(h http.Handler) *HTTPRequestMetrics {
return &HTTPRequestMetrics{next: h}
}
func (h *HTTPRequestMetrics) ServeHTTP(w http.ResponseWriter, r *http.
Request) {
atomic.AddInt64(&h.activeConnections, 1)
defer atomic.AddInt64(&h.activeConnections, -1)
h.next.ServeHTTP(w, r)
}
But looks like defer never gets called when under heavy load (and clients
see connection reset by peer)
Does anyone know a way of getting current open connections?
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