function getFirstForwardedValue(multiValueHeader) {
  return multiValueHeader?.toString()?.split(",").map((e) => e.trim())?.[0];
}
const IP_RE = /^[0-9a-fA-F.:]{1,45}$/;
function isValidIpAddress(value) {
  return IP_RE.test(value);
}
function getValidatedIpFromHeader(headerValue) {
  const raw = getFirstForwardedValue(headerValue);
  if (raw && isValidIpAddress(raw)) {
    return raw;
  }
  return void 0;
}
function getClientIpAddress(request) {
  return getValidatedIpFromHeader(request.headers.get("x-forwarded-for"));
}
export {
  getClientIpAddress,
  getFirstForwardedValue,
  getValidatedIpFromHeader,
  isValidIpAddress
};