Function DecoderByName

runtimevar/runtimevar.go:515–538

DecoderByName returns a *Decoder based on decoderName. It is intended to be used by URL openers in driver packages. Supported values include: - empty string: Returns the default from the URLOpener.Decoder, or BytesDecoder if URLOpener.Decoder is nil (which is true if you're using the default URLOp

(ctx context.Context, decoderName string, dflt *Decoder)

// "RUNTIMEVAR_KEEPER_URL". See https://godoc.org/gocloud.dev/secrets#OpenKeeper
// for more details.
func DecoderByName(ctx context.Context, decoderName string, dflt *Decoder) (*Decoder, error) {
	// Open a *secrets.Keeper if the decoderName contains "decrypt".
	k, decoderName, err := decryptByName(ctx, decoderName)
	if err != nil {
		return nil, err
	}

	if dflt == nil {
		dflt = BytesDecoder
	}
	switch decoderName {
	case "":
		return maybeDecrypt(ctx, k, dflt), nil
	case "bytes":
		return maybeDecrypt(ctx, k, BytesDecoder), nil
	case "jsonmap":
		var m map[string]any
		return maybeDecrypt(ctx, k, NewDecoder(&m, JSONDecode)), nil
	case "string":
		return maybeDecrypt(ctx, k, StringDecoder), nil
	default:
		return nil, fmt.Errorf("unsupported decoder %q", decoderName)
	}
}

// decryptByName returns a *secrets.Keeper for decryption when decoderName
// contains "decrypt".