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sftpfs: disable buffering for downloads if concurrent reads are disabled

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This commit is contained in:
Nicola Murino 2021-04-04 09:53:29 +02:00
parent 1ee843757d
commit d92861a8e8
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GPG key ID: 2F1FB59433D5A8CB
1 changed files with 10 additions and 4 deletions
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14
vfs/sftpfs.go
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@ -262,10 +262,16 @@ func (fs *SFTPFs) Open(name string, offset int64) (File, *pipeat.PipeReaderAt, f
return nil, nil, nil, err
}
go func() {
br := bufio.NewReaderSize(f, int(fs.config.BufferSize)*1024*1024)
// we don't use io.Copy since bufio.Reader implements io.ReadFrom and
// so it calls the sftp.File ReadFrom method without buffering
n, err := fs.copy(w, br)
var n int64
var err error
if fs.config.DisableCouncurrentReads {
n, err = fs.copy(w, f)
} else {
br := bufio.NewReaderSize(f, int(fs.config.BufferSize)*1024*1024)
// we don't use io.Copy since bufio.Reader implements io.ReadFrom and
// so it calls the sftp.File ReadFrom method without buffering
n, err = fs.copy(w, br)
}
w.CloseWithError(err) //nolint:errcheck
f.Close()
fsLog(fs, logger.LevelDebug, "download completed, path: %#v size: %v, err: %v", name, n, err)