Function decodeCborHeaders

go/bundle/decoder.go:91–142

https://wicg.github.io/webpackage/draft-yasskin-dispatch-bundled-exchanges.html#cbor-headers

(dec *cbor.Decoder)

// https://wicg.github.io/webpackage/draft-yasskin-dispatch-bundled-exchanges.html#cbor-headers
func decodeCborHeaders(dec *cbor.Decoder) (http.Header, map[string]string, error) {
	n, err := dec.DecodeMapHeader()
	if err != nil {
		return nil, nil, fmt.Errorf("Failed to decode request headers map header: %v", err)
	}

	headers := make(http.Header)

	pseudos := make(map[string]string)

	for j := uint64(0); j < n; j++ {
		namebs, err := dec.DecodeByteString()
		if err != nil {
			return nil, nil, fmt.Errorf("Failed to decode request headers map key: %v", err)
		}
		valuebs, err := dec.DecodeByteString()
		if err != nil {
			return nil, nil, fmt.Errorf("Failed to decode request headers map value: %v", err)
		}

		name := string(namebs)
		value := string(valuebs)
		if !isAscii(name) {
			return nil, nil, fmt.Errorf("Failed to decode request headers map key: non-ascii %q", name)
		}
		if !isAscii(value) {
			return nil, nil, fmt.Errorf("Failed to decode request headers map value: non-ascii %q", value)
		}

		if strings.ToLower(name) != name {
			return nil, nil, fmt.Errorf("Failed to decode request headers map key: %q contains upper-case.", name)
		}

		if strings.HasPrefix(name, ":") {
			if _, exists := pseudos[name]; exists {
				return nil, nil, fmt.Errorf("Failed to decode request headers map entry. Pseudo %q appeared twice.", name)
			}

			pseudos[name] = value

			continue
		}

		if _, exists := headers[name]; exists {
			return nil, nil, fmt.Errorf("Failed to decode request headers map entry. Header %q appeared twice.", name)
		}

		headers.Set(name, value)
	}

	return headers, pseudos, nil
}

// https://wpack-wg.github.io/bundled-responses/draft-ietf-wpack-bundled-responses.html#name-the-index-section
func parseIndexSection(sectionContents []byte, sectionsStart uint64, sos []sectionOffset) ([]requestEntryWithOffset, error) {