storage

package

v0.22.12 Latest Latest Go to latest Published: Jul 7, 2021 License: MIT Imports: 10 Imported by: 0

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Repository

github.com/PKURio/quic-go

Links

Open Source Insights

Documentation ¶

Index ¶

Constants
Variables
func Checksum(data []byte) uint32
func CreateStoragePath()
func GetCRCFilePath(fid string) string
func ParseDataFilename(fileBaseName string) (fid string, blockIndex int)
func ReadFile(path string) ([]byte, error)
func VerifyBlockCRC(blockIndex int, block []byte, crcArray []uint32) bool
type File
type Item
- func LoadCRCFromFile(rid string) (*Item, error)
- func ParseCRC(rid string, content []byte) (*Item, error)

Constants ¶

View Source

const (
	DataFileExtension string = ".data"
	CRCFileExtension  string = ".crc"
)

Variables ¶

View Source

var (
	ErrorReadCRCFile = errors.New("failed to read crc file")
	ErrorParseCRC    = errors.New("failed to parse crc content")
	ErrorInvalidCRC  = errors.New("invalid crc content")
	ErrorVerifyCRC   = errors.New("error verifying crc of file")
)

View Source

var (
	ErrorOpenDataFile = errors.New("error opening data file")
	ErrorReadDataFile = errors.New("error opening data file")
)

View Source

var (
	Path = "../../data/"
)

Functions ¶

func Checksum ¶

func Checksum(data []byte) uint32

Checksum 计算标准的 IEEE802.3 CRC 结果

func CreateStoragePath ¶

func CreateStoragePath()

func GetCRCFilePath ¶

func GetCRCFilePath(fid string) string

GetCRCFilePath 获取一个crc文件的路径

func ParseDataFilename ¶

func ParseDataFilename(fileBaseName string) (fid string, blockIndex int)

parseDataFilename 解析数据文件的文件名+扩展名部分，并返回 FID 和文件的块序号

func ReadFile ¶

func ReadFile(path string) ([]byte, error)

ReadFile 读取一个磁盘文件

func VerifyBlockCRC ¶

func VerifyBlockCRC(blockIndex int, block []byte, crcArray []uint32) bool

VerifyBlockCRC 校验一个2MB数据块(读出或写入)的CRC值

Types ¶

type File ¶

type File struct {
	Files []Item `json:"files"`
}

type Item ¶

type Item struct {
	FileLen  int64    `json:"file_len"`
	FileName string   `json:"file_name"`
	FilePath string   `json:"file_path"`
	FID      string   `json:"fid"`
	CRCArray []uint32 `json:"crc_array"`
}

func LoadCRCFromFile ¶

func LoadCRCFromFile(rid string) (*Item, error)

LoadCRCFromFile 从磁盘加载 CRC 信息到内存索引若发现已存在则直接返回

func ParseCRC ¶

func ParseCRC(rid string, content []byte) (*Item, error)

ParseCRC 从json格式的内容中解析出 CRC 数组并添加到索引

Source Files ¶

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