private bool TryParseHostHeader(out IPAddress address, out string host, out int port)
{
address = null;
host = null;
port = -1;
var hostHeader = RequestHeaders.GetHeader("Host");
if (String.IsNullOrWhiteSpace(hostHeader))
{
return(false);
}
// IPv6 (http://www.ietf.org/rfc/rfc2732.txt)
if (hostHeader.StartsWith("[", StringComparison.Ordinal))
{
var portIndex = hostHeader.LastIndexOf("]:", StringComparison.Ordinal);
if (portIndex != -1 && Int32.TryParse(hostHeader.Substring(portIndex + 2), out port))
{
if (IPAddress.TryParse(hostHeader.Substring(1, portIndex - 1), out address))
{
host = null;
return(true);
}
host = hostHeader.Substring(0, portIndex + 1);
return(true);
}
if (hostHeader.EndsWith("]", StringComparison.Ordinal))
{
if (IPAddress.TryParse(hostHeader.Substring(1, hostHeader.Length - 2), out address))
{
host = null;
port = -1;
return(true);
}
}
}
else
{
// IPAddresses
if (IPAddress.TryParse(hostHeader, out address))
{
host = null;
port = -1;
return(true);
}
var portIndex = hostHeader.LastIndexOf(':');
if (portIndex != -1 && Int32.TryParse(hostHeader.Substring(portIndex + 1), out port))
{
host = hostHeader.Substring(0, portIndex);
return(true);
}
}
// Plain
host = hostHeader;
return(true);
}
