internal int CheckCurrentStep(int readCount)
{
_messageBytesReadLength += readCount;
_bufferStartIndex += readCount;
if (_currentFrameHeaderData == null)
{
if (_messageBytesReadLength < FrameFormat.FrameHeaderSize)
{
return(0);
}
if (FrameFormat.CheckFrameHeader(_readBuffer) == false)
{
return(-1);
}
var frameHeaderData = _tempFrameHeaderData;
FrameFormat.ReadDataFromHeaderBuffer(_readBuffer, ref frameHeaderData);
_headerExtentionLength = frameHeaderData.HeaderExtentionLength;
_titleLength = frameHeaderData.TitleLength;
_contentLength = frameHeaderData.ContentLength;
_stateCode = frameHeaderData.StateCode;
_messageId = frameHeaderData.MessageId;
_currentFrameHeaderData = frameHeaderData;
_headerExtentionBytes = _headerExtentionLength == 0 ? FrameFormat.EmptyBytes : new byte[_headerExtentionLength];
_titleBytes = _titleLength == 0 ? FrameFormat.EmptyBytes : new byte[_titleLength];
_contentBytes = _contentLength == 0 ? FrameFormat.EmptyBytes : new byte[_contentLength];
if (GetBodyLength() == 0)
{
return(_messageBytesReadLength == FrameFormat.FrameHeaderSize ? 1 : -1);
}
readCount = readCount - FrameFormat.FrameHeaderSize;
}
_unprocessCount += readCount;
var messageLength = GetBodyLength() + FrameFormat.FrameHeaderSize;
// message format error,return error code
if (_messageBytesReadLength > messageLength)
{
return(-1);
}
// read datas and return success code
if (_messageBytesReadLength == messageLength)
{
ReadBufferDatas(_unprocessCount);
return(1);
}
// message is not complete,return continue-reading code
// if buffer is full,move datas to cache and clear buffer
if (_bufferStartIndex == _readBuffer.Length)
{
ReadBufferDatas(_unprocessCount);
_unprocessCount = 0;
_bufferStartIndex = 0;
}
//continue to read
return(0);
}
internal void CheckCurrentReceive(int readCount)
{
if (_step == 0)
{
_currentStepReadCount += readCount;
if (FrameFormat.CheckFrameHeader(_currentStepReadBuffer, _currentStepReadCount) == false)
{
throw new Exception("step:0, CheckHeader error");
}
var frameHeaderData = _tempFrameHeaderData;
FrameFormat.ReadDataFromHeaderBuffer(_currentStepReadBuffer, ref frameHeaderData);
_titleLength = frameHeaderData.TitleLength;
_contentLength = frameHeaderData.ContentLength;
_stateCode = frameHeaderData.StateCode;
_messageId = frameHeaderData.MessageId;
if (_titleLength + _contentLength == 0)
{
_title = string.Empty;
_contentBytes = FrameFormat.EmptyBytes;
StepTo(2);
return;
}
StepTo(1);
return;
}
if (_step == 1)
{
_currentStepReadCount += readCount;
if (_currentStepReadCount < _titleLength + _contentLength)
{
return;
}
if (_currentStepReadCount != _titleLength + _contentLength)
{
throw new Exception("message body length error");
}
_title = string.Empty;
if (_titleLength > 0)
{
_title = FrameFormat.GetTitle(_currentStepReadBuffer, 0, _titleLength);
}
_contentBytes = new byte[_contentLength];
if (_contentLength > 0)
{
Array.Copy(_currentStepReadBuffer, _titleLength, _contentBytes, 0, _contentLength);
}
StepTo(2);
return;
}
if (_step == 2)
{
throw new Exception();
}
}