fix copy out

http.go

@@ -2,11 +2,11 @@ package main
 
 import (
  "context"
- "io/ioutil"
  "log"
  "net/http"
 
  "github.com/docker/docker/api/types"
+ "github.com/docker/docker/pkg/stdcopy"
 )
 
 func checkAccessKey(r *http.Request) bool {
@@ -46,15 +46,9 @@ func supervisorLogs(w http.ResponseWriter, r *http.Request) {
  }
  defer reader.Close()
 
- //read the first 8 bytes to ignore the HEADER part from docker container logs
- p := make([]byte, 8)
- reader.Read(p)
-
  // Return the content
- content, _ := ioutil.ReadAll(reader)
-
  w.Header().Add("Content-Type", "text/plain")
- w.Write(content)
+ stdcopy.StdCopy(w, w, reader)
 }
 
 func supervisorRestart(w http.ResponseWriter, r *http.Request) {