package needle import ( "encoding/hex" "fmt" "strings" . "github.com/seaweedfs/seaweedfs/weed/storage/types" ) type FileId struct { VolumeId VolumeId Key NeedleId Cookie Cookie } func NewFileIdFromNeedle(VolumeId VolumeId, n *Needle) *FileId { return &FileId{VolumeId: VolumeId, Key: n.Id, Cookie: n.Cookie} } func NewFileId(VolumeId VolumeId, key uint64, cookie uint32) *FileId { return &FileId{VolumeId: VolumeId, Key: Uint64ToNeedleId(key), Cookie: Uint32ToCookie(cookie)} } // Deserialize the file id func ParseFileIdFromString(fid string) (*FileId, error) { vid, needleKeyCookie, err := splitVolumeId(fid) if err != nil { return nil, err } volumeId, err := NewVolumeId(vid) if err != nil { return nil, err } nid, cookie, err := ParseNeedleIdCookie(needleKeyCookie) if err != nil { return nil, err } fileId := &FileId{VolumeId: volumeId, Key: nid, Cookie: cookie} return fileId, nil } func (n *FileId) GetVolumeId() VolumeId { return n.VolumeId } func (n *FileId) GetNeedleId() NeedleId { return n.Key } func (n *FileId) GetCookie() Cookie { return n.Cookie } func (n *FileId) GetNeedleIdCookie() string { return formatNeedleIdCookie(n.Key, n.Cookie) } func (n *FileId) String() string { return n.VolumeId.String() + "," + formatNeedleIdCookie(n.Key, n.Cookie) } func formatNeedleIdCookie(key NeedleId, cookie Cookie) string { bytes := make([]byte, NeedleIdSize+CookieSize) NeedleIdToBytes(bytes[0:NeedleIdSize], key) CookieToBytes(bytes[NeedleIdSize:NeedleIdSize+CookieSize], cookie) nonzero_index := 0 for ; bytes[nonzero_index] == 0 && nonzero_index < NeedleIdSize; nonzero_index++ { } return hex.EncodeToString(bytes[nonzero_index:]) } // copied from operation/delete_content.go, to cut off cycle dependency func splitVolumeId(fid string) (vid string, key_cookie string, err error) { commaIndex := strings.Index(fid, ",") if commaIndex <= 0 { return "", "", fmt.Errorf("wrong fid format") } return fid[:commaIndex], fid[commaIndex+1:], nil }