private static void WriteNegotiatePayload(IBufferWriter <byte> writer, string connectionId, HttpContext context, HttpConnectionOptions 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);
}
public static void WriteResponse(NegotiationResponse response, IBufferWriter <byte> output)
{
var reusableWriter = ReusableUtf8JsonWriter.Get(output);
try
{
var writer = reusableWriter.GetJsonWriter();
writer.WriteStartObject();
if (!string.IsNullOrEmpty(response.Url))
{
writer.WriteString(UrlPropertyNameBytes, response.Url);
}
if (!string.IsNullOrEmpty(response.AccessToken))
{
writer.WriteString(AccessTokenPropertyNameBytes, response.AccessToken);
}
if (!string.IsNullOrEmpty(response.ConnectionId))
{
writer.WriteString(ConnectionIdPropertyNameBytes, response.ConnectionId);
}
writer.WriteStartArray(AvailableTransportsPropertyNameBytes);
if (response.AvailableTransports != null)
{
var transportCount = response.AvailableTransports.Count;
for (var i = 0; i < transportCount; ++i)
{
var availableTransport = response.AvailableTransports[i];
writer.WriteStartObject();
if (availableTransport.Transport != null)
{
writer.WriteString(TransportPropertyNameBytes, availableTransport.Transport);
}
else
{
// Might be able to remove this after https://github.com/dotnet/corefx/issues/34632 is resolved
writer.WriteNull(TransportPropertyNameBytes);
}
writer.WriteStartArray(TransferFormatsPropertyNameBytes);
if (availableTransport.TransferFormats != null)
{
var formatCount = availableTransport.TransferFormats.Count;
for (var j = 0; j < formatCount; ++j)
{
writer.WriteStringValue(availableTransport.TransferFormats[j]);
}
}
writer.WriteEndArray();
writer.WriteEndObject();
}
}
writer.WriteEndArray();
writer.WriteEndObject();
writer.Flush();
Debug.Assert(writer.CurrentDepth == 0);
}
finally
{
ReusableUtf8JsonWriter.Return(reusableWriter);
}
}
public static void WriteResponse(NegotiationResponse response, IBufferWriter <byte> output)
{
var textWriter = Utf8BufferTextWriter.Get(output);
try
{
using (var jsonWriter = JsonUtils.CreateJsonTextWriter(textWriter))
{
jsonWriter.WriteStartObject();
if (!string.IsNullOrEmpty(response.Url))
{
jsonWriter.WritePropertyName(UrlPropertyName);
jsonWriter.WriteValue(response.Url);
}
if (!string.IsNullOrEmpty(response.AccessToken))
{
jsonWriter.WritePropertyName(AccessTokenPropertyName);
jsonWriter.WriteValue(response.AccessToken);
}
if (!string.IsNullOrEmpty(response.ConnectionId))
{
jsonWriter.WritePropertyName(ConnectionIdPropertyName);
jsonWriter.WriteValue(response.ConnectionId);
}
jsonWriter.WritePropertyName(AvailableTransportsPropertyName);
jsonWriter.WriteStartArray();
if (response.AvailableTransports != null)
{
foreach (var availableTransport in response.AvailableTransports)
{
jsonWriter.WriteStartObject();
jsonWriter.WritePropertyName(TransportPropertyName);
jsonWriter.WriteValue(availableTransport.Transport);
jsonWriter.WritePropertyName(TransferFormatsPropertyName);
jsonWriter.WriteStartArray();
if (availableTransport.TransferFormats != null)
{
foreach (var transferFormat in availableTransport.TransferFormats)
{
jsonWriter.WriteValue(transferFormat);
}
}
jsonWriter.WriteEndArray();
jsonWriter.WriteEndObject();
}
}
jsonWriter.WriteEndArray();
jsonWriter.WriteEndObject();
jsonWriter.Flush();
}
}
finally
{
Utf8BufferTextWriter.Return(textWriter);
}
}
public static void WriteResponse(NegotiationResponse response, IBufferWriter <byte> output)
{
var reusableWriter = ReusableUtf8JsonWriter.Get(output);
try
{
var writer = reusableWriter.GetJsonWriter();
writer.WriteStartObject();
// If we already have an error its due to a protocol version incompatibility.
// We can just write the error and complete the JSON object and return.
if (!string.IsNullOrEmpty(response.Error))
{
writer.WriteString(ErrorPropertyNameBytes, response.Error);
writer.WriteEndObject();
writer.Flush();
Debug.Assert(writer.CurrentDepth == 0);
return;
}
writer.WriteNumber(NegotiateVersionPropertyNameBytes, response.Version);
if (!string.IsNullOrEmpty(response.Url))
{
writer.WriteString(UrlPropertyNameBytes, response.Url);
}
if (!string.IsNullOrEmpty(response.AccessToken))
{
writer.WriteString(AccessTokenPropertyNameBytes, response.AccessToken);
}
if (!string.IsNullOrEmpty(response.ConnectionId))
{
writer.WriteString(ConnectionIdPropertyNameBytes, response.ConnectionId);
}
if (response.Version > 0 && !string.IsNullOrEmpty(response.ConnectionToken))
{
writer.WriteString(ConnectionTokenPropertyNameBytes, response.ConnectionToken);
}
writer.WriteStartArray(AvailableTransportsPropertyNameBytes);
if (response.AvailableTransports != null)
{
var transportCount = response.AvailableTransports.Count;
for (var i = 0; i < transportCount; ++i)
{
var availableTransport = response.AvailableTransports[i];
writer.WriteStartObject();
if (availableTransport.Transport != null)
{
writer.WriteString(TransportPropertyNameBytes, availableTransport.Transport);
}
else
{
// Might be able to remove this after https://github.com/dotnet/corefx/issues/34632 is resolved
writer.WriteNull(TransportPropertyNameBytes);
}
writer.WriteStartArray(TransferFormatsPropertyNameBytes);
if (availableTransport.TransferFormats != null)
{
var formatCount = availableTransport.TransferFormats.Count;
for (var j = 0; j < formatCount; ++j)
{
writer.WriteStringValue(availableTransport.TransferFormats[j]);
}
}
writer.WriteEndArray();
writer.WriteEndObject();
}
}
writer.WriteEndArray();
writer.WriteEndObject();
writer.Flush();
Debug.Assert(writer.CurrentDepth == 0);
}
finally
{
ReusableUtf8JsonWriter.Return(reusableWriter);
}
}
