Function storeFormDataKeys

packages/remix/src/utils/utils.ts:13–44

(
  args: LoaderFunctionArgs | ActionFunctionArgs,
  span: Span,
  formDataKeys?: Record<string, string | boolean>,
)

 * Store configured FormData keys as span attributes for Remix actions.
 */
export async function storeFormDataKeys(
  args: LoaderFunctionArgs | ActionFunctionArgs,
  span: Span,
  formDataKeys?: Record<string, string | boolean>,
): Promise<void> {
  try {
    // We clone the request for Remix be able to read the FormData later.
    const clonedRequest = args.request.clone();

    // This only will return the last name of multiple file uploads in a single FormData entry.
    // We can switch to `unstable_parseMultipartFormData` when it's stable.
    // https://remix.run/docs/en/main/utils/parse-multipart-form-data#unstable_parsemultipartformdata
    const formData = await clonedRequest.formData();

    formData.forEach((value, key) => {
      let attrKey = key;

      if (formDataKeys?.[key]) {
        if (typeof formDataKeys[key] === 'string') {
          attrKey = formDataKeys[key];
        }

        span.setAttribute(
          `remix.action_form_data.${attrKey}`,
          typeof value === 'string' ? value : '[non-string value]',
        );
      }
    });
  } catch (e) {
    DEBUG_BUILD && debug.warn('Failed to read FormData from request', e);
  }
}

/**
 * Converts Remix route IDs to parameterized paths at runtime.