export function getCompleteConfig()

in src/lambda-edge/shared/shared.ts [178:219]

36 lines of code
6 McCabe index (conditional complexity)


export function getCompleteConfig(): CompleteConfig {
  const config = getConfigWithHeaders();

  if (!isCompleteConfig(config)) {
    throw new Error("Incomplete config in configuration.json");
  }

  // Derive cookie settings by merging the defaults with the explicitly provided values
  const defaultCookieSettings = getDefaultCookieSettings({
    compatibility: config.cookieCompatibility,
    mode: config.mode,
  });
  const cookieSettings = config.cookieSettings
    ? (Object.fromEntries(
        Object.entries({
          ...defaultCookieSettings,
          ...config.cookieSettings,
        }).map(([k, v]) => [
          k,
          v || defaultCookieSettings[k as keyof CookieSettings],
        ])
      ) as CookieSettings)
    : defaultCookieSettings;

  // Defaults for nonce and PKCE
  const defaults = {
    secretAllowedCharacters:
      "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~",
    pkceLength: 43, // Should be between 43 and 128 - per spec
    nonceLength: 16,
    nonceMaxAge:
      (cookieSettings?.nonce &&
        parseInt(parse(cookieSettings.nonce.toLowerCase())["max-age"])) ||
      60 * 60 * 24,
  };

  return {
    ...defaults,
    ...config,
    cookieSettings,
  };
}