public WebSocketContext AcceptWebSocket(string protocol)
#endif
{
if (_websocketContext != null)
throw new InvalidOperationException("The accepting is already in progress.");
if (protocol?.Length == 0)
throw new ArgumentException("An empty string.", nameof(protocol));
//if (!protocol.IsToken())
// throw new ArgumentException("Contains an invalid character.", "protocol");
#if COMPAT
_websocketContext = new WebSocketContext(this, protocol, log);
#else
_websocketContext = new WebSocketContext(this, protocol);
#endif
_websocketContext.WebSocket.InternalAccept();
return _websocketContext;
}
// As server
private bool CheckHandshakeRequest(WebSocketContext context, out string message)
{
message = null;
if (context.RequestUri == null)
{
message = "Specifies an invalid Request-URI.";
return false;
}
if (!context.IsWebSocketRequest)
{
message = "Not a WebSocket handshake request.";
return false;
}
var headers = context.Headers;
if (!ValidateSecWebSocketKeyHeader(headers["Sec-WebSocket-Key"]))
{
message = "Includes no Sec-WebSocket-Key header, or it has an invalid value.";
return false;
}
if (!ValidateSecWebSocketVersionClientHeader(headers["Sec-WebSocket-Version"]))
{
message = "Includes no Sec-WebSocket-Version header, or it has an invalid value.";
return false;
}
if (!ValidateSecWebSocketProtocolClientHeader(headers["Sec-WebSocket-Protocol"]))
{
message = "Includes an invalid Sec-WebSocket-Protocol header.";
return false;
}
if (!IgnoreExtensions
&& !string.IsNullOrWhiteSpace(headers["Sec-WebSocket-Extensions"]))
{
message = "Includes an invalid Sec-WebSocket-Extensions header.";
return false;
}
return true;
}
// As server
private void ReleaseServerResources()
{
if (_closeContext == null)
return;
_closeContext();
_closeContext = null;
_stream = null;
_context = null;
}
// As server
internal WebSocket(WebSocketContext context, string protocol)
{
_context = context;
_protocol = protocol;
_closeContext = context.Close;
#if COMPAT
Log = context.Log;
#endif
_message = Messages;
IsSecure = context.IsSecureConnection;
_stream = context.Stream;
_waitTime = TimeSpan.FromSeconds(1);
Init();
}
// As server
private bool CustomCheckHandshakeRequest(WebSocketContext context, out string message)
{
message = null;
return CustomHandshakeRequestChecker == null
|| (message = CustomHandshakeRequestChecker(context)) == null;
}