Method ServeHTTP

pkg/webhandlers/error_template.go:58–96

ServeHTTP renders the non-frontend handled errors.

(w http.ResponseWriter, r *http.Request)

// ServeHTTP renders the non-frontend handled errors.
func (t *ErrorTemplate) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	err := RetrieveError(r)
	if err == nil {
		return
	}
	errMsg, _ := json.MarshalIndent(err, "", " ")
	errorID := "n/a"
	errorCorrelationID := "n/a"
	var errorTitle string
	if ttnErr, ok := errors.From(err); ok {
		errorID = ttnErr.FullName()
		errorCorrelationID = ttnErr.CorrelationID()
		errorTitle = ttnErr.FormatMessage(ttnErr.Attributes())
	}
	var errorMessage string
	isGenericNotFound := errors.Resemble(err, errRouteNotFound)
	switch errors.Code(err) {
	case http.StatusNotFound:
		if isGenericNotFound {
			errorTitle = "Page not found"
		}
		errorMessage = "The resource you requested cannot be found."
	case http.StatusUnauthorized:
		errorMessage = "You are not allowed to perform this action."
	default:
		errorMessage = "An unknown error occurred."
	}
	if err := t.template.Execute(w, Data{
		ErrorTitle:          errorTitle,
		ErrorMessage:        errorMessage,
		ErrorID:             errorID,
		CorrelationID:       errorCorrelationID,
		BackendErrorDetails: string(errMsg),
		Year:                time.Now().Year(),
		IsGenericNotFound:   isGenericNotFound,
	}); err != nil {
		log.FromContext(r.Context()).WithError(err).Warn("Failed to execute template")
	}
}