Function normalizeQueryParams

packages/next/src/server/server-utils.ts:425–448

(
    query: Record<string, string | string[] | undefined>,
    routeParamKeys: Set<string>
  )

  }

  function normalizeQueryParams(
    query: Record<string, string | string[] | undefined>,
    routeParamKeys: Set<string>
  ) {
    // this is used to pass query information in rewrites
    // but should not be exposed in final query
    delete query['nextInternalLocale']

    for (const [key, value] of Object.entries(query)) {
      const normalizedKey = normalizeNextQueryParam(key)
      if (!normalizedKey) continue

      // Remove the prefixed key from the query params because we want
      // to consume it for the dynamic route matcher.
      delete query[key]
      routeParamKeys.add(normalizedKey)

      if (typeof value === 'undefined') continue

      query[normalizedKey] = Array.isArray(value)
        ? value.map((v) => decodeQueryPathParameter(v))
        : decodeQueryPathParameter(value)
    }
  }

  return {
    handleRewrites,