file.update(inputStream);
            } catch (final IOException e) {
                logger.warn("Failed to process a request.", e);
                throwValidationError(messages -> messages.addErrorsFailedToUploadProtwordsFile(GLOBAL),
                        () -> redirectWith(getClass(), moreUrl("uploadpage/" + form.dictId)));
            }
            saveInfo(messages -> messages.addSuccessUploadProtwordsFile(GLOBAL));

        validateApi(form, messages -> {});
        final StemmerOverrideFile file = stemmerOverrideService.getStemmerOverrideFile(form.dictId).orElseGet(() -> {
            throwValidationErrorApi(messages -> messages.addErrorsFailedToUploadProtwordsFile(GLOBAL));
            return null;
        });
        try (InputStream inputStream = form.stemmerOverrideFile.getInputStream()) {
            file.update(inputStream);