Function normalizeOAuthErrorBody

src/services/mcp/auth.ts:157–190

(
  response: Response,
)

 * experimental-until-21 which is incorrect. Pattern matches existing
 * createAuthFetch suppressions in this file. */
export async function normalizeOAuthErrorBody(
  response: Response,
): Promise<Response> {
  if (!response.ok) {
    return response
  }
  const text = await response.text()
  let parsed: unknown
  try {
    parsed = jsonParse(text)
  } catch {
    return new Response(text, response)
  }
  if (OAuthTokensSchema.safeParse(parsed).success) {
    return new Response(text, response)
  }
  const result = OAuthErrorResponseSchema.safeParse(parsed)
  if (!result.success) {
    return new Response(text, response)
  }
  const normalized = NONSTANDARD_INVALID_GRANT_ALIASES.has(result.data.error)
    ? {
        error: 'invalid_grant',
        error_description:
          result.data.error_description ??
          `Server returned non-standard error code: ${result.data.error}`,
      }
    : result.data
  return new Response(jsonStringify(normalized), {
    status: 400,
    statusText: 'Bad Request',
    headers: response.headers,
  })
}
/* eslint-enable eslint-plugin-n/no-unsupported-features/node-builtins */

/**