private void WriteNegotiatePayload(IBufferWriter <byte> writer, string?connectionId, string?connectionToken, HttpContext context, HttpConnectionDispatcherOptions options,
int clientProtocolVersion, string?error)
{
var response = new NegotiationResponse();
if (!string.IsNullOrEmpty(error))
{
response.Error = error;
NegotiateProtocol.WriteResponse(response, writer);
return;
}
response.Version = clientProtocolVersion;
response.ConnectionId = connectionId;
response.ConnectionToken = connectionToken;
response.AvailableTransports = new List <AvailableTransport>();
if ((options.Transports & HttpTransportType.WebSockets) != 0 && ServerHasWebSockets(context.Features))
{
response.AvailableTransports.Add(_webSocketAvailableTransport);
}
if ((options.Transports & HttpTransportType.ServerSentEvents) != 0)
{
response.AvailableTransports.Add(_serverSentEventsAvailableTransport);
}
if ((options.Transports & HttpTransportType.LongPolling) != 0)
{
response.AvailableTransports.Add(_longPollingAvailableTransport);
}
NegotiateProtocol.WriteResponse(response, writer);
}
private void WriteNegotiatePayload(IBufferWriter <byte> writer, string connectionId, string connectionToken, HttpContext context, HttpConnectionDispatcherOptions options,
int clientProtocolVersion, string error)
{
var response = new NegotiationResponse();
if (!string.IsNullOrEmpty(error))
{
response.Error = error;
NegotiateProtocol.WriteResponse(response, writer);
return;
}
if (clientProtocolVersion > 0)
{
if (clientProtocolVersion < options.MinimumProtocolVersion)
{
response.Error = $"The client requested version '{clientProtocolVersion}', but the server does not support this version.";
Log.NegotiateProtocolVersionMismatch(_logger, clientProtocolVersion);
NegotiateProtocol.WriteResponse(response, writer);
return;
}
else if (clientProtocolVersion > _protocolVersion)
{
response.Version = _protocolVersion;
}
else
{
response.Version = clientProtocolVersion;
}
}
else if (options.MinimumProtocolVersion > 0)
{
// NegotiateVersion wasn't parsed meaning the client requests version 0.
response.Error = $"The client requested version '0', but the server does not support this version.";
NegotiateProtocol.WriteResponse(response, writer);
return;
}
response.ConnectionId = connectionId;
response.ConnectionToken = connectionToken;
response.AvailableTransports = new List <AvailableTransport>();
if ((options.Transports & HttpTransportType.WebSockets) != 0 && ServerHasWebSockets(context.Features))
{
response.AvailableTransports.Add(_webSocketAvailableTransport);
}
if ((options.Transports & HttpTransportType.ServerSentEvents) != 0)
{
response.AvailableTransports.Add(_serverSentEventsAvailableTransport);
}
if ((options.Transports & HttpTransportType.LongPolling) != 0)
{
response.AvailableTransports.Add(_longPollingAvailableTransport);
}
NegotiateProtocol.WriteResponse(response, writer);
}
private static void WriteNegotiatePayload(IBufferWriter <byte> writer, string connectionId, HttpContext context, HttpConnectionDispatcherOptions options)
{
var response = new NegotiationResponse();
response.ConnectionId = connectionId;
response.AvailableTransports = new List <AvailableTransport>();
if ((options.Transports & HttpTransportType.WebSockets) != 0 && ServerHasWebSockets(context.Features))
{
response.AvailableTransports.Add(_webSocketAvailableTransport);
}
if ((options.Transports & HttpTransportType.ServerSentEvents) != 0)
{
response.AvailableTransports.Add(_serverSentEventsAvailableTransport);
}
if ((options.Transports & HttpTransportType.LongPolling) != 0)
{
response.AvailableTransports.Add(_longPollingAvailableTransport);
}
NegotiateProtocol.WriteResponse(response, writer);
}
private void WriteNegotiatePayload(IBufferWriter <byte> writer, string connectionId, HttpContext context, HttpConnectionDispatcherOptions options)
{
var response = new NegotiationResponse();
if (context.Request.Query.TryGetValue("NegotiateVersion", out var queryStringVersion))
{
// Set the negotiate response to the protocol we use.
var queryStringVersionValue = queryStringVersion.ToString();
if (int.TryParse(queryStringVersionValue, out var clientProtocolVersion))
{
if (clientProtocolVersion < options.MinimumProtocolVersion)
{
response.Error = $"The client requested version '{clientProtocolVersion}', but the server does not support this version.";
Log.NegotiateProtocolVersionMismatch(_logger, clientProtocolVersion);
NegotiateProtocol.WriteResponse(response, writer);
return;
}
else if (clientProtocolVersion > _protocolVersion)
{
response.Version = _protocolVersion;
}
else
{
response.Version = clientProtocolVersion;
}
}
else
{
response.Error = $"The client requested an invalid protocol version '{queryStringVersionValue}'";
Log.InvalidNegotiateProtocolVersion(_logger, queryStringVersionValue);
NegotiateProtocol.WriteResponse(response, writer);
return;
}
}
else if (options.MinimumProtocolVersion > 0)
{
// NegotiateVersion wasn't parsed meaning the client requests version 0.
response.Error = $"The client requested version '0', but the server does not support this version.";
NegotiateProtocol.WriteResponse(response, writer);
return;
}
response.ConnectionId = connectionId;
response.AvailableTransports = new List <AvailableTransport>();
if ((options.Transports & HttpTransportType.WebSockets) != 0 && ServerHasWebSockets(context.Features))
{
response.AvailableTransports.Add(_webSocketAvailableTransport);
}
if ((options.Transports & HttpTransportType.ServerSentEvents) != 0)
{
response.AvailableTransports.Add(_serverSentEventsAvailableTransport);
}
if ((options.Transports & HttpTransportType.LongPolling) != 0)
{
response.AvailableTransports.Add(_longPollingAvailableTransport);
}
NegotiateProtocol.WriteResponse(response, writer);
}