Function redirect

packages/next/src/server/api-utils/index.ts:59–77

(
  res: NextApiResponse,
  statusOrUrl: string | number,
  url?: string
)

 * @param url URL of redirect
 */
export function redirect(
  res: NextApiResponse,
  statusOrUrl: string | number,
  url?: string
): NextApiResponse<any> {
  if (typeof statusOrUrl === 'string') {
    url = statusOrUrl
    statusOrUrl = 307
  }
  if (typeof statusOrUrl !== 'number' || typeof url !== 'string') {
    throw new Error(
      `Invalid redirect arguments. Please use a single argument URL, e.g. res.redirect('/destination') or use a status code and URL, e.g. res.redirect(307, '/destination').`
    )
  }
  res.writeHead(statusOrUrl, { Location: url })
  res.write(url)
  res.end()
  return res
}

export function checkIsOnDemandRevalidate(
  req: Request | IncomingMessage | BaseNextRequest,