Fix bandwidth monitoring to be per remote target (#16360)

cmd/admin-handlers.go

@@ -32,7 +32,6 @@ import (
 	"hash/crc32"
 	"io"
 	"math"
-	"math/rand"
 	"net/http"
 	"net/url"
 	"os"
@@ -2341,66 +2340,6 @@ func getTLSInfo() madmin.TLSInfo {
 	return tlsInfo
 }
 
-// BandwidthMonitorHandler - GET /minio/admin/v3/bandwidth
-// ----------
-// Get bandwidth consumption information
-func (a adminAPIHandlers) BandwidthMonitorHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, w, "BandwidthMonitor")
-
-	defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
-
-	// Validate request signature.
-	_, adminAPIErr := checkAdminRequestAuth(ctx, r, iampolicy.BandwidthMonitorAction, "")
-	if adminAPIErr != ErrNone {
-		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(adminAPIErr), r.URL)
-		return
-	}
-
-	rnd := rand.New(rand.NewSource(time.Now().UnixNano()))
-
-	setEventStreamHeaders(w)
-	reportCh := make(chan madmin.BucketBandwidthReport)
-	keepAliveTicker := time.NewTicker(500 * time.Millisecond)
-	defer keepAliveTicker.Stop()
-	bucketsRequestedString := r.Form.Get("buckets")
-	bucketsRequested := strings.Split(bucketsRequestedString, ",")
-	go func() {
-		defer close(reportCh)
-		for {
-			select {
-			case <-ctx.Done():
-				return
-			case reportCh <- globalNotificationSys.GetBandwidthReports(ctx, bucketsRequested...):
-				time.Sleep(time.Duration(rnd.Float64() * float64(2*time.Second)))
-			}
-		}
-	}()
-
-	enc := json.NewEncoder(w)
-	for {
-		select {
-		case report, ok := <-reportCh:
-			if !ok {
-				return
-			}
-			if err := enc.Encode(report); err != nil {
-				return
-			}
-			if len(reportCh) == 0 {
-				// Flush if nothing is queued
-				w.(http.Flusher).Flush()
-			}
-		case <-keepAliveTicker.C:
-			if _, err := w.Write([]byte(" ")); err != nil {
-				return
-			}
-			w.(http.Flusher).Flush()
-		case <-ctx.Done():
-			return
-		}
-	}
-}
-
 // ServerInfoHandler - GET /minio/admin/v3/info
 // ----------
 // Get server information