public WebSocketFrame Read(Stream stream, Socket socket)
{
byte byte1;
try
{
byte1 = (byte)stream.ReadByte();
}
catch (IOException)
{
if (socket.Connected)
{
throw;
}
else
{
return(null);
}
}
// process first byte
byte finBitFlag = 0x80;
byte opCodeFlag = 0x0F;
bool isFinBitSet = (byte1 & finBitFlag) == finBitFlag;
WebSocketOpCode opCode = (WebSocketOpCode)(byte1 & opCodeFlag);
// read and process second byte
byte byte2 = (byte)stream.ReadByte();
byte maskFlag = 0x80;
bool isMaskBitSet = (byte2 & maskFlag) == maskFlag;
uint len = ReadLength(byte2, stream);
byte[] decodedPayload;
// use the masking key to decode the data if needed
if (isMaskBitSet)
{
const int maskKeyLen = 4;
byte[] maskKey = BinaryReaderWriter.ReadExactly(maskKeyLen, stream);
byte[] encodedPayload = BinaryReaderWriter.ReadExactly((int)len, stream);
decodedPayload = new byte[len];
// apply the mask key
for (int i = 0; i < encodedPayload.Length; i++)
{
decodedPayload[i] = (Byte)(encodedPayload[i] ^ maskKey[i % maskKeyLen]);
}
}
else
{
decodedPayload = BinaryReaderWriter.ReadExactly((int)len, stream);
}
WebSocketFrame frame = new WebSocketFrame(isFinBitSet, opCode, decodedPayload, true);
return(frame);
}
public static long ReadLongExactly(Stream stream, bool isLittleEndian)
{
byte[] lenBuffer = BinaryReaderWriter.ReadExactly(8, stream);
if (!isLittleEndian)
{
Array.Reverse(lenBuffer); // big endian
}
return(BitConverter.ToInt64(lenBuffer, 0));
}
public static ushort ReadUShortExactly(Stream stream, bool isLittleEndian)
{
byte[] lenBuffer = BinaryReaderWriter.ReadExactly(2, stream);
if (!isLittleEndian)
{
Array.Reverse(lenBuffer); // big endian
}
return(BitConverter.ToUInt16(lenBuffer, 0));
}
public WebSocketFrame Read(Stream stream, Socket socket)
{
byte byte1;
try
{
byte1 = (byte)stream.ReadByte();
}
catch (IOException)
{
if (socket.Connected)
{
throw;
}
else
{
return(null);
}
}
// process first byte
byte finBitFlag = 0x80;
byte opCodeFlag = 0x0F;
bool isFinBitSet = (byte1 & finBitFlag) == finBitFlag;
WebSocketOpCode opCode = (WebSocketOpCode)(byte1 & opCodeFlag);
// read and process second byte
byte byte2 = (byte)stream.ReadByte();
byte maskFlag = 0x80;
bool isMaskBitSet = (byte2 & maskFlag) == maskFlag;
uint len = ReadLength(byte2, stream);
byte[] payload;
// use the masking key to decode the data if needed
if (isMaskBitSet)
{
byte[] maskKey = BinaryReaderWriter.ReadExactly(WebSocketFrameCommon.MaskKeyLength, stream);
payload = BinaryReaderWriter.ReadExactly((int)len, stream);
// apply the mask key to the payload (which will be mutated)
WebSocketFrameCommon.ToggleMask(maskKey, payload);
}
else
{
payload = BinaryReaderWriter.ReadExactly((int)len, stream);
}
WebSocketFrame frame = new WebSocketFrame(isFinBitSet, opCode, payload, true);
return(frame);
}