public byte[] GetFrameBytesFromData(WebSocketOpCode opCode, byte[] payload, bool isLastFrame) { using (MemoryStream memoryStream = new MemoryStream()) { byte finBitSetAsByte = isLastFrame ? (byte)0x80 : (byte)0x00; byte byte1 = (byte)(finBitSetAsByte | (byte)opCode); memoryStream.WriteByte(byte1); // NB, dont set the mask flag. No need to mask data from server to client // depending on the size of the length we want to write it as a byte, ushort or ulong if (payload.Length < 126) { byte byte2 = (byte)payload.Length; memoryStream.WriteByte(byte2); } else if (payload.Length <= ushort.MaxValue) { byte byte2 = 126; memoryStream.WriteByte(byte2); BinaryReaderWriter.WriteUShort((ushort)payload.Length, memoryStream, false); } else { byte byte2 = 127; memoryStream.WriteByte(byte2); BinaryReaderWriter.WriteULong((ulong)payload.Length, memoryStream, false); } memoryStream.Write(payload, 0, payload.Length); byte[] buffer = memoryStream.ToArray(); return(buffer); } }
public void Write(WebSocketOpCode opCode, byte[] payload, bool isLastFrame) { // best to write everything to a memory stream before we push it onto the wire // not really necessary but I like it this way using (MemoryStream memoryStream = new MemoryStream()) { byte finBitSetAsByte = isLastFrame ? (byte)0x80 : (byte)0x00; byte byte1 = (byte)(finBitSetAsByte | (byte)opCode); memoryStream.WriteByte(byte1); // NB, set the mask flag if we are constructing a client frame byte maskBitSetAsByte = _isClient ? (byte)0x80 : (byte)0x00; // depending on the size of the length we want to write it as a byte, ushort or ulong if (payload.Length < 126) { byte byte2 = (byte)(maskBitSetAsByte | (byte)payload.Length); memoryStream.WriteByte(byte2); } else if (payload.Length <= ushort.MaxValue) { byte byte2 = (byte)(maskBitSetAsByte | 126); memoryStream.WriteByte(byte2); BinaryReaderWriter.WriteUShort((ushort)payload.Length, memoryStream, false); } else { byte byte2 = (byte)(maskBitSetAsByte | 127); memoryStream.WriteByte(byte2); BinaryReaderWriter.WriteULong((ulong)payload.Length, memoryStream, false); } // if we are creating a client frame then we MUST mack the payload as per the spec if (_isClient) { byte[] maskKey = new byte[WebSocketFrameCommon.MaskKeyLength]; _random.NextBytes(maskKey); memoryStream.Write(maskKey, 0, maskKey.Length); // mask the payload WebSocketFrameCommon.ToggleMask(maskKey, payload); } memoryStream.Write(payload, 0, payload.Length); byte[] buffer = memoryStream.ToArray(); _stream.Write(buffer, 0, buffer.Length); } }
public static void SendWebSocket(int Index, WebSocketOpCode opCode, String Data, bool isLastFrame) { var array = Encoding.UTF8.GetBytes(Data); var fromPayload = new ArraySegment <byte>(array); MemoryStream memoryStream = new MemoryStream(); byte finBitSetAsByte = isLastFrame ? (byte)0x80 : (byte)0x00; byte byte1 = (byte)(finBitSetAsByte | (byte)opCode); memoryStream.WriteByte(byte1); byte maskBitSetAsByte = (byte)0x00; // depending on the size of the length we want to write it as a byte, ushort or ulong if (fromPayload.Count < 126) { byte byte2 = (byte)(maskBitSetAsByte | (byte)fromPayload.Count); memoryStream.WriteByte(byte2); } else if (fromPayload.Count <= ushort.MaxValue) { byte byte2 = (byte)(maskBitSetAsByte | 126); memoryStream.WriteByte(byte2); BinaryReaderWriter.WriteUShort((ushort)fromPayload.Count, memoryStream, false); } else { byte byte2 = (byte)(maskBitSetAsByte | 127); memoryStream.WriteByte(byte2); BinaryReaderWriter.WriteULong((ulong)fromPayload.Count, memoryStream, false); } memoryStream.Write(fromPayload.Array, fromPayload.Offset, fromPayload.Count); mapIndex_Client[Index].Socket.Client.Send(memoryStream.ToArray()); }