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Fix expending buffer in StdCopy 

Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume@charmes.net> (github: creack)
This commit is contained in:
Guillaume J. Charmes 2014-03-31 10:49:48 -07:00
parent 7727c817fb
commit e4aaacc235
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GPG Key ID: B33E4642CB6E3FF3
1 changed files with 3 additions and 2 deletions
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5
utils/stdcopy.go
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@ -108,12 +108,13 @@ func StdCopy(dstout, dsterr io.Writer, src io.Reader) (written int64, err error)
// Retrieve the size of the frame // Retrieve the size of the frame
frameSize = int(binary.BigEndian.Uint32(buf[StdWriterSizeIndex : StdWriterSizeIndex+4])) frameSize = int(binary.BigEndian.Uint32(buf[StdWriterSizeIndex : StdWriterSizeIndex+4]))
Debugf("framesize: %d", frameSize)
// Check if the buffer is big enough to read the frame. // Check if the buffer is big enough to read the frame.
// Extend it if necessary. // Extend it if necessary.
if frameSize+StdWriterPrefixLen > bufLen { if frameSize+StdWriterPrefixLen > bufLen {
Debugf("Extending buffer cap.") Debugf("Extending buffer cap by %d (was %d)", frameSize+StdWriterPrefixLen-bufLen+1, len(buf))
buf = append(buf, make([]byte, frameSize-len(buf)+1)...) buf = append(buf, make([]byte, frameSize+StdWriterPrefixLen-bufLen+1)...)
bufLen = len(buf) bufLen = len(buf)
} }