Exemplo n.º 1
0
        /// <summary>
        /// Checks for IP address or well known hostnames that map to the computer.
        /// </summary>
        /// <param name="hostname">The hostname.</param>
        /// <returns>The hostname to use for URL filtering.</returns>
        protected string NormalizeHostname(string hostname)
        {
            string computerName = Utils.GetHostName();

            // substitute the computer name for localhost if localhost used by client.
            if (Utils.AreDomainsEqual(hostname, "localhost"))
            {
                return(computerName.ToUpper());
            }


            // check if client is using an ip address.
            IPAddress address = null;

            if (System.Net.IPAddress.TryParse(hostname, out address))
            {
                if (System.Net.IPAddress.IsLoopback(address))
                {
                    return(computerName.ToUpper());
                }

                // substitute the computer name for any local IP if an IP is used by client.
                IPAddress[] addresses = Utils.GetHostAddresses(Utils.GetHostName());

                for (int ii = 0; ii < addresses.Length; ii++)
                {
                    if (addresses[ii].Equals(address))
                    {
                        return(computerName.ToUpper());
                    }
                }

                // not a localhost IP address.
                return(hostname.ToUpper());
            }

            // return normalized hostname.
            return(hostname.ToUpper());
        }