func getUniqueURL()

in internal/uniquedomain/middleware.go [34:74]

32 lines of code
6 McCabe index (conditional complexity)


func getUniqueURL(r *http.Request) string {
	domain := domain.FromRequest(r)
	lookupPath, err := domain.GetLookupPath(r)
	if err != nil {
		logging.
			LogRequest(r).
			WithError(err).
			Error("uniqueDomain: failed to get lookupPath")
		return ""
	}

	// No uniqueHost to redirect
	if lookupPath.UniqueHost == "" {
		return ""
	}

	requestHost, port, err := net.SplitHostPort(r.Host)
	if err != nil {
		requestHost = r.Host
	}

	// Already serving the uniqueHost
	if lookupPath.UniqueHost == requestHost {
		return ""
	}

	uniqueURL := *r.URL
	if port == "" {
		uniqueURL.Host = lookupPath.UniqueHost
	} else {
		uniqueURL.Host = net.JoinHostPort(lookupPath.UniqueHost, port)
	}

	// Ensure to redirect to the same path requested
	uniqueURL.Path = strings.TrimPrefix(
		r.URL.Path,
		strings.TrimSuffix(lookupPath.Prefix, "/"),
	)

	return uniqueURL.String()
}