Function getHostname

packages/app/src/request.ts:45–56

(req: Request)

}

export const getHostname = (req: Request): string | undefined => {
  let host: string = req.get('X-Forwarded-Host') as string

  if (!host || !trustRemoteAddress(req)) host = req.get('Host') as string

  if (!host) return

  // IPv6 literal support
  const index = host.indexOf(':', host[0] === '[' ? host.indexOf(']') + 1 : 0)

  return index !== -1 ? host.substring(0, index) : host
}

export const getIP = (req: Pick<IncomingMessage, 'headers' | 'connection'>): string | undefined =>
  proxyAddr(req, trustRemoteAddress(req)).replace(/^.*:/, '') // striping the redundant prefix addeded by OS to IPv4 address