kCFURLErrorUnknown   = -998,
kCFURLErrorCancelled = -999,
kCFURLErrorBadURL    = -1000,
kCFURLErrorTimedOut  = -1001,
kCFURLErrorUnsupportedURL = -1002,
kCFURLErrorCannotFindHost = -1003,
kCFURLErrorCannotConnectToHost    = -1004,
kCFURLErrorNetworkConnectionLost  = -1005,
kCFURLErrorDNSLookupFailed        = -1006,
kCFURLErrorHTTPTooManyRedirects   = -1007,
kCFURLErrorResourceUnavailable    = -1008,
kCFURLErrorNotConnectedToInternet = -1009,
kCFURLErrorRedirectToNonExistentLocation = -1010,
kCFURLErrorBadServerResponse             = -1011,
kCFURLErrorUserCancelledAuthentication   = -1012,
kCFURLErrorUserAuthenticationRequired    = -1013,
kCFURLErrorZeroByteResource        = -1014,
kCFURLErrorCannotDecodeRawData     = -1015,
kCFURLErrorCannotDecodeContentData = -1016,
kCFURLErrorCannotParseResponse     = -1017,
kCFURLErrorInternationalRoamingOff = -1018,
kCFURLErrorCallIsActive               = -1019,
kCFURLErrorDataNotAllowed             = -1020,
kCFURLErrorRequestBodyStreamExhausted = -1021,
kCFURLErrorFileDoesNotExist           = -1100,
kCFURLErrorFileIsDirectory            = -1101,
kCFURLErrorNoPermissionsToReadFile    = -1102,
kCFURLErrorDataLengthExceedsMaximum   = -1103,