cidutil

Documentation

Index

• func ComputeFileCID(f io.ReadSeeker) (string, error)
• func ImageVariantPath(id, variant string) string
• func IsLegacyCID(cid string) bool
• func IsLegacyCIDStrict(cid string) bool
• func ShardCID(cidStr string) string
• func UnescapeCidParam(next echo.HandlerFunc) echo.HandlerFunc
• func ValidateCID(expectedCID string, f io.ReadSeeker) error

Functions

func ComputeFileCID

func ComputeFileCID(f io.ReadSeeker) (string, error)

func ImageVariantPath

func ImageVariantPath(id, variant string) string

/img/shard/orig_cid/150x150.jpg

func IsLegacyCID

func IsLegacyCID(cid string) bool

Returns true both for "Qm" CIDs AND for for keys like "Qmwhatever/150x150.jpg" to support legacy migrated keys

func IsLegacyCIDStrict

func IsLegacyCIDStrict(cid string) bool

Only returns true for exact v0 CIDs (46 chars and start with "Qm")

func ShardCID

func ShardCID(cidStr string) string

Returns a sharded filepath/key for CID based on CID version. V0: last 3 chars, offset by 1 V1: last 5 chars Fallback: unchanged (for legacy migrated keys like "Qm.../150x150.jpg")

func UnescapeCidParam

func UnescapeCidParam(next echo.HandlerFunc) echo.HandlerFunc

func ValidateCID

func ValidateCID(expectedCID string, f io.ReadSeeker) error

note: any Qm CID will be invalid because its hash won't match the contents