Function parseFetchArgs

packages/core/src/instrument/fetch.ts:256–280

(fetchArgs: unknown[])

 * Exported for tests only.
 */
export function parseFetchArgs(fetchArgs: unknown[]): { method: string; url: string } {
  if (fetchArgs.length === 0) {
    return { method: 'GET', url: '' };
  }

  if (fetchArgs.length === 2) {
    const [resource, options] = fetchArgs as [FetchResource, object];

    return {
      url: getUrlFromResource(resource),
      method: hasProp(options, 'method')
        ? String(options.method).toUpperCase()
        : // Request object as first argument
          isRequest(resource) && hasProp(resource, 'method')
          ? String(resource.method).toUpperCase()
          : 'GET',
    };
  }

  const arg = fetchArgs[0];
  return {
    url: getUrlFromResource(arg as FetchResource),
    method: hasProp(arg, 'method') ? String(arg.method).toUpperCase() : 'GET',
  };
}

function getHeadersFromFetchArgs(fetchArgs: unknown[]): WebFetchHeaders | undefined {
  const [requestArgument, optionsArgument] = fetchArgs;