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Adding header version

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This commit is contained in:
Frederick F. Kautz IV 2015-02-18 10:18:24 -08:00
parent c212ae18bc
commit 05ac09bf69
1 changed files with 16 additions and 6 deletions
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22
pkg/storage/donut/donut.go
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@ -39,16 +39,26 @@ func (donut Donut) Write(header Header, object io.Reader) error {
return err return err
} }
// write header length // prefix consists of a version number and a length
var headerLengthBuffer bytes.Buffer var headerPrefixBuffer bytes.Buffer
headerLength := headerBuffer.Len() // write version
err = binary.Write(&headerLengthBuffer, binary.LittleEndian, headerLength) var version int
version = 1
err = binary.Write(&headerPrefixBuffer, binary.LittleEndian, version)
if err != nil { if err != nil {
return err return err
} }
// write header length // write length
io.Copy(&newObjectBuffer, &headerLengthBuffer) var headerLength int
headerLength = headerBuffer.Len()
err = binary.Write(&headerPrefixBuffer, binary.LittleEndian, headerLength)
if err != nil {
return err
}
// write header prefix
io.Copy(&newObjectBuffer, &headerPrefixBuffer)
// write header // write header
io.Copy(&newObjectBuffer, &headerBuffer) io.Copy(&newObjectBuffer, &headerBuffer)