Revert "a better byte buffer pool"

This reverts commit 59c6422777.

weed/operation/upload_content.go

@@ -19,7 +19,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/security"
 	"github.com/chrislusf/seaweedfs/weed/util"
-	"github.com/valyala/bytebufferpool"
 )
 
 type UploadResult struct {
@@ -77,14 +76,12 @@ func Upload(uploadUrl string, filename string, cipher bool, reader io.Reader, is
 }
 
 func doUpload(uploadUrl string, filename string, cipher bool, reader io.Reader, isInputCompressed bool, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (uploadResult *UploadResult, err error, data []byte) {
-	buf := bytebufferpool.Get()
-	defer bytebufferpool.Put(buf)
-	_, err = buf.ReadFrom(reader)
+	data, err = ioutil.ReadAll(reader)
 	if err != nil {
 		err = fmt.Errorf("read input: %v", err)
 		return
 	}
-	uploadResult, uploadErr := retriedUploadData(uploadUrl, filename, cipher, buf.Bytes(), isInputCompressed, mtype, pairMap, jwt)
+	uploadResult, uploadErr := retriedUploadData(uploadUrl, filename, cipher, data, isInputCompressed, mtype, pairMap, jwt)
 	return uploadResult, uploadErr, data
 }
 
@@ -182,7 +179,6 @@ func doUploadData(uploadUrl string, filename string, cipher bool, data []byte, i
 }
 
 func upload_content(uploadUrl string, fillBufferFunction func(w io.Writer) error, filename string, isGzipped bool, originalDataSize int, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (*UploadResult, error) {
-
 	body_buf := bytes.NewBufferString("")
 	body_writer := multipart.NewWriter(body_buf)
 	h := make(textproto.MIMEHeader)