rename all remaining packages to internal/ (#12418)

This is to ensure that there are no projects
that try to import `minio/minio/pkg` into
their own repo. Any such common packages should
go to `https://github.com/minio/pkg`

internal/http/stats/http-traffic-recorder.go

@@ -0,0 +1,65 @@
+// Copyright (c) 2015-2021 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package stats
+
+import (
+	"io"
+	"net/http"
+)
+
+// IncomingTrafficMeter counts the incoming bytes from the underlying request.Body.
+type IncomingTrafficMeter struct {
+	io.ReadCloser
+	countBytes int
+}
+
+// Read calls the underlying Read and counts the transferred bytes.
+func (r *IncomingTrafficMeter) Read(p []byte) (n int, err error) {
+	n, err = r.ReadCloser.Read(p)
+	r.countBytes += n
+	return n, err
+}
+
+// BytesCount returns the number of transferred bytes
+func (r IncomingTrafficMeter) BytesCount() int {
+	return r.countBytes
+}
+
+// OutgoingTrafficMeter counts the outgoing bytes through the responseWriter.
+type OutgoingTrafficMeter struct {
+	// wrapper for underlying http.ResponseWriter.
+	http.ResponseWriter
+	countBytes int
+}
+
+// Write calls the underlying write and counts the output bytes
+func (w *OutgoingTrafficMeter) Write(p []byte) (n int, err error) {
+	n, err = w.ResponseWriter.Write(p)
+	w.countBytes += n
+	return n, err
+}
+
+// Flush calls the underlying Flush.
+func (w *OutgoingTrafficMeter) Flush() {
+	w.ResponseWriter.(http.Flusher).Flush()
+}
+
+// BytesCount returns the number of transferred bytes
+func (w OutgoingTrafficMeter) BytesCount() int {
+	return w.countBytes
+}