gsh-digital-services/seaweedFS
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avoid writing the same file

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This commit is contained in:
Chris Lu
2013-07-11 22:44:59 -07:00
parent db46565d18
commit 4c1bc99366
2 changed files with 31 additions and 2 deletions
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8
go/storage/needle_read_write.go
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@@ -130,9 +130,11 @@ func (n *Needle) Read(r io.Reader, size uint32, version Version) (ret int, err e
n.readNeedleHeader(bytes)
n.Data = bytes[NeedleHeaderSize : NeedleHeaderSize+size]
checksum := util.BytesToUint32(bytes[NeedleHeaderSize+size : NeedleHeaderSize+size+NeedleChecksumSize])
if checksum != NewCRC(n.Data).Value() {
newChecksum := NewCRC(n.Data)
if checksum != newChecksum.Value() {
return 0, errors.New("CRC error! Data On Disk Corrupted!")
}
n.Checksum = newChecksum
return
case Version2:
if size == 0 {
@@ -151,9 +153,11 @@ func (n *Needle) Read(r io.Reader, size uint32, version Version) (ret int, err e
}
n.readNeedleDataVersion2(bytes[NeedleHeaderSize : NeedleHeaderSize+int(n.Size)])
checksum := util.BytesToUint32(bytes[NeedleHeaderSize+n.Size : NeedleHeaderSize+n.Size+NeedleChecksumSize])
if checksum != NewCRC(n.Data).Value() {
newChecksum := NewCRC(n.Data)
if checksum != newChecksum.Value() {
return 0, errors.New("CRC error! Data On Disk Corrupted!")
}
n.Checksum = newChecksum
return
}
return 0, fmt.Errorf("Unsupported Version! (%d)", version)