check if a file accessible on a web server

hello

I wonder if this is a good way to check if a file is accessible on a web
server without getting it.

function Web_FileExists(AURL: String): Boolean;
var idHttp: TIdHTTP;
begin
  Result := False;
  idHTTP := TIdHTTP.Create(nil);
  try
    idHttp.Head(AURL);
    Result := idHttp.ResponseCode = 200;
  finally
     idHTTP.Free;
  end;
end;

Thanks in advance.