public override IWebSocketFragment Filter(IAppSession <IWebSocketFragment> session, byte[] readBuffer, int offset, int length, bool isReusableBuffer, out int left)
{
left = 0;
var skipByteCount = 0;
if (!m_Type.HasValue)
{
byte startByte = readBuffer[offset];
skipByteCount = 1;
m_Type = startByte;
}
//0xxxxxxx: Collect protocol data by end mark
if ((m_Type.Value & 0x80) == 0x00)
{
byte lookForByte = 0xFF;
int i;
for (i = offset + skipByteCount; i < offset + length; i++)
{
if (readBuffer[i] == lookForByte)
{
left = length - (i - offset + 1);
if (BufferSegments.Count <= 0)
{
var commandInfo = new PlainFragment(Encoding.UTF8.GetString(readBuffer, offset + skipByteCount, i - offset - skipByteCount));
Reset();
return(commandInfo);
}
else
{
AddArraySegment(readBuffer, offset + skipByteCount, i - offset - skipByteCount, false);
var commandInfo = new PlainFragment(BufferSegments.Decode(Encoding.UTF8));
Reset();
return(commandInfo);
}
}
}
AddArraySegment(readBuffer, offset + skipByteCount, length - skipByteCount, isReusableBuffer);
return(null);
}
else//10000000: Collect protocol data by length
{
while (!m_Length.HasValue)
{
if (length <= skipByteCount)
{
//No data to read
return(null);
}
byte lengthByte = readBuffer[skipByteCount];
//Closing handshake
if (lengthByte == 0x00 && m_Type.Value == m_ClosingHandshakeType)
{
session.Close(CloseReason.ClientClosing);
return(null);
}
int thisLength = (int)(lengthByte & 0x7F);
m_TempLength = m_TempLength * 128 + thisLength;
skipByteCount++;
if ((lengthByte & 0x80) != 0x80)
{
m_Length = m_TempLength;
break;
}
}
int requiredSize = m_Length.Value - BufferSegments.Count;
int leftSize = length - skipByteCount;
if (leftSize < requiredSize)
{
AddArraySegment(readBuffer, skipByteCount, length - skipByteCount, isReusableBuffer);
return(null);
}
else
{
left = leftSize - requiredSize;
if (BufferSegments.Count <= 0)
{
var commandInfo = new PlainFragment(Encoding.UTF8.GetString(readBuffer, offset + skipByteCount, requiredSize));
Reset();
return(commandInfo);
}
else
{
AddArraySegment(readBuffer, offset + skipByteCount, requiredSize, false);
var commandInfo = new PlainFragment(BufferSegments.Decode(Encoding.UTF8));
Reset();
return(commandInfo);
}
}
}
}
public override IWebSocketFragment FindCommandInfo(IAppSession session, byte[] readBuffer, int offset, int length, bool isReusableBuffer, out int left)
{
left = 0;
var skipByteCount = 0;
if (!m_Type.HasValue)
{
byte startByte = readBuffer[offset];
skipByteCount = 1;
m_Type = startByte;
}
//0xxxxxxx: Collect protocol data by end mark
if ((m_Type.Value & 0x80) == 0x00)
{
byte lookForByte = 0xFF;
int i;
for (i = offset + skipByteCount; i < offset + length; i++)
{
if (readBuffer[i] == lookForByte)
{
left = length - (i - offset + 1);
if (BufferSegments.Count <= 0)
{
var commandInfo = new PlainFragment(Encoding.UTF8.GetString(readBuffer, offset + skipByteCount, i - offset - skipByteCount));
Reset();
return commandInfo;
}
else
{
AddArraySegment(readBuffer, offset + skipByteCount, i - offset - skipByteCount, false);
var commandInfo = new PlainFragment(BufferSegments.Decode(Encoding.UTF8));
Reset();
return commandInfo;
}
}
}
AddArraySegment(readBuffer, offset + skipByteCount, length - skipByteCount, isReusableBuffer);
return null;
}
else//10000000: Collect protocol data by length
{
while (!m_Length.HasValue)
{
if (length <= skipByteCount)
{
//No data to read
return null;
}
byte lengthByte = readBuffer[skipByteCount];
//Closing handshake
if (lengthByte == 0x00 && m_Type.Value == m_ClosingHandshakeType)
{
session.Close(CloseReason.ClientClosing);
return null;
}
int thisLength = (int)(lengthByte & 0x7F);
m_TempLength = m_TempLength * 128 + thisLength;
skipByteCount++;
if ((lengthByte & 0x80) != 0x80)
{
m_Length = m_TempLength;
break;
}
}
int requiredSize = m_Length.Value - BufferSegments.Count;
int leftSize = length - skipByteCount;
if (leftSize < requiredSize)
{
AddArraySegment(readBuffer, skipByteCount, length - skipByteCount, isReusableBuffer);
return null;
}
else
{
left = leftSize - requiredSize;
if (BufferSegments.Count <= 0)
{
var commandInfo = new PlainFragment(Encoding.UTF8.GetString(readBuffer, offset + skipByteCount, requiredSize));
Reset();
return commandInfo;
}
else
{
AddArraySegment(readBuffer, offset + skipByteCount, requiredSize, false);
var commandInfo = new PlainFragment(BufferSegments.Decode(Encoding.UTF8));
Reset();
return commandInfo;
}
}
}
}