storj.io/minio@v0.0.0-20230509071714-0cbc90f649b1/cmd/http/stats/http-traffic-recorder.go (about)

     1  /*
     2   * MinIO Cloud Storage, (C) 2019-2020 MinIO, Inc.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package stats
    18  
    19  import (
    20  	"io"
    21  	"net/http"
    22  )
    23  
    24  // IncomingTrafficMeter counts the incoming bytes from the underlying request.Body.
    25  type IncomingTrafficMeter struct {
    26  	io.ReadCloser
    27  	countBytes int
    28  }
    29  
    30  // Read calls the underlying Read and counts the transferred bytes.
    31  func (r *IncomingTrafficMeter) Read(p []byte) (n int, err error) {
    32  	n, err = r.ReadCloser.Read(p)
    33  	r.countBytes += n
    34  	return n, err
    35  }
    36  
    37  // BytesCount returns the number of transferred bytes
    38  func (r IncomingTrafficMeter) BytesCount() int {
    39  	return r.countBytes
    40  }
    41  
    42  // OutgoingTrafficMeter counts the outgoing bytes through the responseWriter.
    43  type OutgoingTrafficMeter struct {
    44  	// wrapper for underlying http.ResponseWriter.
    45  	http.ResponseWriter
    46  	countBytes int
    47  }
    48  
    49  // Write calls the underlying write and counts the output bytes
    50  func (w *OutgoingTrafficMeter) Write(p []byte) (n int, err error) {
    51  	n, err = w.ResponseWriter.Write(p)
    52  	w.countBytes += n
    53  	return n, err
    54  }
    55  
    56  // Flush calls the underlying Flush.
    57  func (w *OutgoingTrafficMeter) Flush() {
    58  	w.ResponseWriter.(http.Flusher).Flush()
    59  }
    60  
    61  // BytesCount returns the number of transferred bytes
    62  func (w OutgoingTrafficMeter) BytesCount() int {
    63  	return w.countBytes
    64  }