private bool TryFallbackTransport()
{
if (State == ConnectionStates.Connecting)
{
if (BufferedMessages != null)
{
BufferedMessages.Clear();
}
Transport.Stop();
Transport = null;
switch (NextProtocolToTry)
{
case SupportedProtocols.ServerSentEvents:
Transport = new ServerSentEventsTransport(this);
NextProtocolToTry = SupportedProtocols.HTTP;
break;
case SupportedProtocols.HTTP:
Transport = new PollingTransport(this);
NextProtocolToTry = SupportedProtocols.Unknown;
break;
case SupportedProtocols.Unknown:
return(false);
}
TransportConnectionStartedAt = DateTime.UtcNow;
Transport.Connect();
if (PingRequest != null)
{
PingRequest.Abort();
}
return(true);
}
return(false);
}
/// <summary>
/// Try to fall back to next transport. If no more transport to try, it will return false.
/// </summary>
private bool TryFallbackTransport()
{
if (this.State == ConnectionStates.Connecting)
{
if (BufferedMessages != null)
{
BufferedMessages.Clear();
}
// stop the current transport
Transport.Stop();
Transport = null;
switch (NextProtocolToTry)
{
#if !BESTHTTP_DISABLE_WEBSOCKET
case SupportedProtocols.WebSocket:
Transport = new WebSocketTransport(this);
break;
#endif
#if !BESTHTTP_DISABLE_SERVERSENT_EVENTS
case SupportedProtocols.ServerSentEvents:
Transport = new ServerSentEventsTransport(this);
NextProtocolToTry = SupportedProtocols.HTTP;
break;
#endif
case SupportedProtocols.HTTP:
Transport = new PollingTransport(this);
NextProtocolToTry = SupportedProtocols.Unknown;
break;
case SupportedProtocols.Unknown:
return(false);
}
TransportConnectionStartedAt = DateTime.UtcNow;
Transport.Connect();
if (PingRequest != null)
{
PingRequest.Abort();
}
return(true);
}
return(false);
}