public bool TryParseMessage(ref ReadOnlySequence <byte> input, IInvocationBinder binder, out HubMessage message) { if (!TextMessageParser.TryParseMessage(ref input, out var payload)) { message = null; return(false); } var textReader = Utf8BufferTextReader.Get(payload); try { message = ParseMessage(textReader, binder); } finally { Utf8BufferTextReader.Return(textReader); } return(message != null); }
public static bool TryParseResponseMessage(ref ReadOnlySequence <byte> buffer, out HandshakeResponseMessage responseMessage) { if (!TextMessageParser.TryParseMessage(ref buffer, out var payload)) { responseMessage = null; return(false); } var textReader = Utf8BufferTextReader.Get(payload); try { using (var reader = JsonUtils.CreateJsonTextReader(textReader)) { JsonUtils.CheckRead(reader); JsonUtils.EnsureObjectStart(reader); string error = null; var completed = false; while (!completed && JsonUtils.CheckRead(reader)) { switch (reader.TokenType) { case JsonToken.PropertyName: var memberName = reader.Value.ToString(); switch (memberName) { case TypePropertyName: // a handshake response does not have a type // check the incoming message was not any other type of message throw new InvalidDataException("Handshake response should not have a 'type' value."); case ErrorPropertyName: error = JsonUtils.ReadAsString(reader, ErrorPropertyName); break; default: reader.Skip(); break; } break; case JsonToken.EndObject: completed = true; break; default: throw new InvalidDataException($"Unexpected token '{reader.TokenType}' when reading handshake response JSON."); } } ; responseMessage = (error != null) ? new HandshakeResponseMessage(error) : HandshakeResponseMessage.Empty; return(true); } } finally { Utf8BufferTextReader.Return(textReader); } }
public static bool TryParseRequestMessage(ref ReadOnlySequence <byte> buffer, out HandshakeRequestMessage requestMessage) { if (!TextMessageParser.TryParseMessage(ref buffer, out var payload)) { requestMessage = null; return(false); } var textReader = Utf8BufferTextReader.Get(payload); try { using (var reader = JsonUtils.CreateJsonTextReader(textReader)) { JsonUtils.CheckRead(reader); JsonUtils.EnsureObjectStart(reader); string protocol = null; int? protocolVersion = null; var completed = false; while (!completed && JsonUtils.CheckRead(reader)) { switch (reader.TokenType) { case JsonToken.PropertyName: var memberName = reader.Value.ToString(); switch (memberName) { case ProtocolPropertyName: protocol = JsonUtils.ReadAsString(reader, ProtocolPropertyName); break; case ProtocolVersionPropertyName: protocolVersion = JsonUtils.ReadAsInt32(reader, ProtocolVersionPropertyName); break; default: reader.Skip(); break; } break; case JsonToken.EndObject: completed = true; break; default: throw new InvalidDataException($"Unexpected token '{reader.TokenType}' when reading handshake request JSON."); } } if (protocol == null) { throw new InvalidDataException($"Missing required property '{ProtocolPropertyName}'."); } if (protocolVersion == null) { throw new InvalidDataException($"Missing required property '{ProtocolVersionPropertyName}'."); } requestMessage = new HandshakeRequestMessage(protocol, protocolVersion.Value); } } finally { Utf8BufferTextReader.Return(textReader); } return(true); }