public bool Connect(Uri connectUri)
{
_path = connectUri.PathAndQuery;
_version = Protocols.Http2;
_scheme = connectUri.Scheme;
_host = connectUri.Host;
_port = connectUri.Port;
ServerUri = connectUri.Authority;
if (_clientSession != null)
{
return false;
}
try
{
int port = connectUri.Port;
int securePort;
if (!int.TryParse(ConfigurationManager.AppSettings["securePort"], out securePort))
{
Http2Logger.LogError("Incorrect port in the config file!");
return false;
}
//Connect alpn extension, set known protocols
var extensions = new[] {ExtensionType.Renegotiation, ExtensionType.ALPN};
Options = port == securePort
? new SecurityOptions(SecureProtocol.Tls1, extensions, new[] { Protocols.Http1, Protocols.Http2 },
ConnectionEnd.Client)
: new SecurityOptions(SecureProtocol.None, extensions, new[] { Protocols.Http1, Protocols.Http2 },
ConnectionEnd.Client);
Options.VerificationType = CredentialVerification.None;
Options.Certificate = Org.Mentalis.Security.Certificates.Certificate.CreateFromCerFile(CertificatePath);
Options.Flags = SecurityFlags.Default;
Options.AllowedAlgorithms = SslAlgorithms.RSA_AES_256_SHA | SslAlgorithms.NULL_COMPRESSION;
_socket = new SecureSocket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp, Options);
IDictionary<string, object> handshakeResult = null;
using (var monitor = new ALPNExtensionMonitor())
{
monitor.OnProtocolSelected += (o, args) => { _selectedProtocol = args.SelectedProtocol; };
_socket.Connect(new DnsEndPoint(connectUri.Host, connectUri.Port), monitor);
if (_useHandshake)
{
var handshakeEnvironment = MakeHandshakeEnvironment(_socket);
//Handshake manager determines what handshake must be used: upgrade or secure
handshakeResult = HandshakeManager.GetHandshakeAction(handshakeEnvironment).Invoke();
Http2Logger.LogDebug("Handshake finished");
if (_selectedProtocol == Protocols.Http1)
{
_useHttp20 = false;
return true;
}
}
}
SendSessionHeader();
_useHttp20 = true;
_clientSession = new Http2Session(_socket, ConnectionEnd.Client, _usePriorities, _useFlowControl, handshakeResult);
//For saving incoming data
_clientSession.OnFrameReceived += FrameReceivedHandler;
_clientSession.OnRequestSent += RequestSentHandler;
_clientSession.OnSessionDisposed += (sender, args) => Dispose(false);
}
catch (Http2HandshakeFailed ex)
{
if (ex.Reason == HandshakeFailureReason.InternalError)
{
_useHttp20 = false;
}
else
{
Http2Logger.LogError("Specified server did not respond");
Dispose(true);
return false;
}
}
catch (SocketException)
{
Http2Logger.LogError("Check if any server listens port " + connectUri.Port);
Dispose(true);
return false;
}
catch (Exception ex)
{
Http2Logger.LogError("Unknown connection exception was caught: " + ex.Message);
Dispose(true);
return false;
}
return true;
}
private async void OpenHttp2Session(SecureSocket incomingClient, IDictionary<string, object> handshakeResult)
{
Console.WriteLine("Handshake successful");
_session = new Http2Session(incomingClient, ConnectionEnd.Server, _usePriorities,_useFlowControl, handshakeResult);
_session.OnFrameReceived += FrameReceivedHandler;
try
{
await _session.Start();
}
catch (Exception)
{
Console.WriteLine("Client was disconnected");
}
}