func parseHeaderString()

in internal/config/config.go [290:317]

• 22 lines of code
• 6 McCabe index (conditional complexity)

func parseHeaderString(customHeaders []string) (http.Header, error) {
	headers := make(http.Header, len(customHeaders))

	var result *multierror.Error
	for _, h := range customHeaders {
		h = h + "\n\n"
		tp := textproto.NewReader(bufio.NewReader(strings.NewReader(h)))

		mimeHeader, err := tp.ReadMIMEHeader()
		if err != nil {
			result = multierror.Append(result, fmt.Errorf("parsing error %s: %w", h, errInvalidHeaderParameter))
		}

		for key, value := range mimeHeader {
			if _, ok := headers[key]; ok {
				result = multierror.Append(result, fmt.Errorf("%s already specified with value '%s': %w", key, value, errDuplicateHeader))
			}

			headers[key] = value
		}
	}

	if result.ErrorOrNil() != nil {
		return nil, result
	}

	return headers, nil
}