/// <summary>
/// Filters the specified session.
/// </summary>
/// <param name="readBuffer">The read buffer.</param>
/// <param name="offset">The offset.</param>
/// <param name="length">The length.</param>
/// <param name="toBeCopied">if set to <c>true</c> [to be copied].</param>
/// <param name="rest">The rest.</param>
/// <returns></returns>
public virtual TRequestInfo Filter(byte[] readBuffer, int offset, int length, bool toBeCopied, out int rest)
{
//获取包头信息
ChainProtocol hp = new ChainProtocol();
result = readBuffer.SearchMark(offset, length, m_SearchState);
if (result == -1)
{
rest = -1;
}
else
{
m_Size = result - offset;
byte[] headerdata = new byte[m_Size];
Buffer.BlockCopy(readBuffer, offset, headerdata, 0, m_Size);
ChainHeader chainHeader = hp.GetChainHeader(headerdata);
rest = m_ParsedLength + length - m_Size;
}
if (rest >= 0)
{
var requestInfo = ProcessMatchedRequest(readBuffer, offset - m_ParsedLength, m_Size, toBeCopied);
InternalReset();
return(requestInfo);
}
else
{
m_ParsedLength += length;
m_OffsetDelta = m_ParsedLength;
rest = 0;
var expectedOffset = offset + length;
var newOffset = m_OrigOffset + m_OffsetDelta;
if (newOffset < expectedOffset)
{
Buffer.BlockCopy(readBuffer, offset - m_ParsedLength + length, readBuffer, m_OrigOffset, m_ParsedLength);
}
return(NullRequestInfo);
}
}
/// <summary>
/// Filters received data of the specific session into request info.
/// </summary>
/// <param name="readBuffer">The read buffer.</param>
/// <param name="offset">The offset of the current received data in this read buffer.</param>
/// <param name="length">The length of the current received data.</param>
/// <param name="toBeCopied">if set to <c>true</c> [to be copied].</param>
/// <param name="rest">The rest, the length of the data which hasn't been parsed.</param>
/// <returns>return the parsed TRequestInfo</returns>
public override TRequestInfo Filter(byte[] readBuffer, int offset, int length, bool toBeCopied, out int rest)
{
rest = 0;
int prevMatched = m_SearchState.Matched;
int result = readBuffer.SearchMark(offset, length, m_SearchState);
var findLen = result - offset;
var packageLen = 0;
//当在收到的数据中没有找到头信息，可能情况：1头信息不完整，2可能是在上一个包中已经存在头信息
if (result <= 0)
{
if (m_OffsetDelta != m_ParsedLengthInBuffer)
{
Buffer.BlockCopy(readBuffer, offset - m_ParsedLengthInBuffer, readBuffer, offset - m_OffsetDelta, m_ParsedLengthInBuffer + length);
m_ParsedLengthInBuffer += length;
m_OffsetDelta = m_ParsedLengthInBuffer;
}
else
{
m_ParsedLengthInBuffer += length;
if (m_ParsedLengthInBuffer >= m_Session.Config.ReceiveBufferSize)
{
this.AddArraySegment(readBuffer, offset + length - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer, toBeCopied);
m_ParsedLengthInBuffer = 0;
m_OffsetDelta = 0;
return(NullRequestInfo);
}
m_OffsetDelta += length;
}
rest = 0;
return(NullRequestInfo);
}
else if (result > 0 && findLen > 0) //头信息完整，并且获得到了头信息，并得到该包的大小。当在一次获取时得到了包的信息
{
byte[] headerdata = new byte[findLen];
Buffer.BlockCopy(readBuffer, offset, headerdata, 0, findLen);
ChainProtocol hp = new ChainProtocol();
ChainHeader chainHeader = hp.GetChainHander(headerdata);
if (chainHeader.Method == "GET" || chainHeader.Method == "DELETE")
{
findLen += m_SearchState.Mark.Length;
packageLen = findLen;
}
else
{
int contentLen = Convert.ToInt32(chainHeader.Data.Get("Content-Length"));
packageLen = contentLen + findLen;
//findLen += contentLen + m_SearchState.Mark.Length;
if ((readBuffer.Length - offset) >= packageLen)
{
findLen += contentLen + m_SearchState.Mark.Length;
}
else
{
m_ParsedLengthInBuffer += length;
if (m_ParsedLengthInBuffer >= m_Session.Config.ReceiveBufferSize)
{
this.AddArraySegment(readBuffer, offset + length - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer, toBeCopied);
m_ParsedLengthInBuffer = 0;
//m_OffsetDelta = 0;
m_OffsetDelta += length;
return(NullRequestInfo);
}
m_OffsetDelta += length;
}
}
}
rest = length - findLen - (m_SearchState.Mark.Length - prevMatched);
TRequestInfo requestInfo;
//当收到最后的数据时，进行组织包
if (findLen > 0)
{
if (this.BufferSegments != null && this.BufferSegments.Count > 0)
{
this.AddArraySegment(readBuffer, offset - m_ParsedLengthInBuffer, findLen + m_ParsedLengthInBuffer, toBeCopied);
requestInfo = ProcessMatchedRequest(BufferSegments, 0, BufferSegments.Count);
}
else
{
requestInfo = ProcessMatchedRequest(readBuffer, offset - m_ParsedLengthInBuffer, findLen + m_ParsedLengthInBuffer);
}
}
else if (findLen <= 0)
{
if (this.BufferSegments != null && this.BufferSegments.Count > 0)
{
requestInfo = ProcessMatchedRequest(BufferSegments, 0, BufferSegments.Count);
}
else
{
requestInfo = ProcessMatchedRequest(readBuffer, offset - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer);
}
}
else if (prevMatched > 0)
{
if (m_ParsedLengthInBuffer > 0)
{
if (m_ParsedLengthInBuffer < prevMatched)
{
BufferSegments.TrimEnd(prevMatched - m_ParsedLengthInBuffer);
requestInfo = ProcessMatchedRequest(BufferSegments, 0, BufferSegments.Count);
}
else
{
if (this.BufferSegments != null && this.BufferSegments.Count > 0)
{
this.AddArraySegment(readBuffer, offset - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer - prevMatched, toBeCopied);
requestInfo = ProcessMatchedRequest(BufferSegments, 0, BufferSegments.Count);
}
else
{
requestInfo = ProcessMatchedRequest(readBuffer, offset - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer - prevMatched);
}
}
}
else
{
BufferSegments.TrimEnd(prevMatched);
requestInfo = ProcessMatchedRequest(BufferSegments, 0, BufferSegments.Count);
}
}
else
{
if (this.BufferSegments != null && this.BufferSegments.Count > 0)
{
requestInfo = ProcessMatchedRequest(BufferSegments, 0, BufferSegments.Count);
}
else
{
requestInfo = ProcessMatchedRequest(readBuffer, offset - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer);
}
}
InternalReset();
if (rest == 0)
{
m_OffsetDelta = 0;
}
else
{
m_OffsetDelta += (length - rest);
}
return(requestInfo);
}
/// <summary>
/// Filters received data of the specific session into request info.
/// </summary>
/// <param name="readBuffer">The read buffer.</param>
/// <param name="offset">The offset of the current received data in this read buffer.</param>
/// <param name="length">The length of the current received data.</param>
/// <param name="toBeCopied">if set to <c>true</c> [to be copied].</param>
/// <param name="rest">The rest, the length of the data which hasn't been parsed.</param>
/// <returns>return the parsed TRequestInfo</returns>
public override TRequestInfo Filter(byte[] readBuffer, int offset, int length, bool toBeCopied, out int rest)
{
rest = 0;
TRequestInfo requestInfo;
int prevMatched = m_SearchState.Matched;
int result = 0;
var findLen = result - offset;
int remainlen = 0;
//Debug.WriteLine("缓存：" + this.BufferSegments.Count);
//判断缓存是否存在，如果存在说明之前数据没有取完，出现粘包
if (this.BufferSegments.Count > 0)
{
if (packLength == 0)//说明之前的数据只有部分包头信息，没能进行解析包头信息
{
//////////
//把缓存的数据加上新收到的数据合并的总接收到的数据，进行查找
int receivedLen = length + this.LeftBufferSize;
byte[] receivedData = new byte[receivedLen];
Buffer.BlockCopy(this.BufferSegments.ToArray(), 0, receivedData, 0, this.BufferSegments.Count);
Buffer.BlockCopy(readBuffer, offset, receivedData, this.BufferSegments.Count, length);
result = receivedData.SearchMark(0, receivedLen, m_SearchState);
findLen = result - this.LeftBufferSize;
if (findLen > 0)//找到包头的数据
{
byte[] headerdata = new byte[findLen + this.BufferSegments.Count];
Buffer.BlockCopy(this.BufferSegments.ToArray(), 0, headerdata, 0, this.BufferSegments.Count);
Buffer.BlockCopy(readBuffer, offset, headerdata, this.BufferSegments.Count, findLen);
ChainProtocol hp = new ChainProtocol();
chainHeader = hp.GetChainHander(headerdata);
if (chainHeader.Method == "GET" || chainHeader.Method == "DELETE")
{
findLen += m_SearchState.Mark.Length;
}
else
{
int contentLen = Convert.ToInt32(chainHeader.Data["Content-Length"]);
packLength = headerdata.Length + contentLen + m_SearchState.Mark.Length;
//包的长度大于接收的长度，则需要缓存下来等下一个包数据过来进行拼接
if (packLength > (length + this.LeftBufferSize))
{
//m_ParsedLengthInBuffer += length;
//this.AddArraySegment(readBuffer, offset + length - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer, toBeCopied);
//m_ParsedLengthInBuffer = 0;
//m_OffsetDelta = 0;
if (m_OffsetDelta != m_ParsedLengthInBuffer)
{
Buffer.BlockCopy(readBuffer, offset - m_ParsedLengthInBuffer, readBuffer, offset - m_OffsetDelta, m_ParsedLengthInBuffer + length);
m_ParsedLengthInBuffer += length;
m_OffsetDelta = m_ParsedLengthInBuffer;
}
else
{
m_ParsedLengthInBuffer += length;
if (m_ParsedLengthInBuffer >= m_Session.Config.ReceiveBufferSize)
{
this.AddArraySegment(readBuffer, offset + length - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer, toBeCopied);
m_ParsedLengthInBuffer = 0;
m_OffsetDelta = 0;
return(NullRequestInfo);
}
m_OffsetDelta += length;
}
return(NullRequestInfo);
}
else if (packLength <= (length + this.LeftBufferSize))//包的长度小于接收的数据长度加上缓存长度，则生成该包，并把多余的数据缓存下来
{
//包的长度刚好等于接收的数据长度，则生成该包即可
//Debug.WriteLine("packLength：{0} < length：{1}".FormatString(packLength,length));
findLen = packLength - this.LeftBufferSize;
}
}
}
else//第一个包的数据不够一个包头的长度
{
if (m_OffsetDelta != m_ParsedLengthInBuffer)
{
Buffer.BlockCopy(readBuffer, offset - m_ParsedLengthInBuffer, readBuffer, offset - m_OffsetDelta, m_ParsedLengthInBuffer + length);
m_ParsedLengthInBuffer += length;
m_OffsetDelta = m_ParsedLengthInBuffer;
}
else
{
m_ParsedLengthInBuffer += length;
if (m_ParsedLengthInBuffer >= m_Session.Config.ReceiveBufferSize)
{
this.AddArraySegment(readBuffer, offset + length - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer, toBeCopied);
m_ParsedLengthInBuffer = 0;
m_OffsetDelta = 0;
return(NullRequestInfo);
}
m_OffsetDelta += length;
}
return(NullRequestInfo);
}
///////////
}
else
{
//剩余的数据包大小
remainlen = packLength - this.BufferSegments.Count;
if (remainlen > 0 && remainlen <= length)//说明剩余的数据等于本次接收的数据//剩余数据小于本次接收的数据长度，则需要重新组包
{
findLen = remainlen;
}
else if (remainlen > 0 && remainlen > length)//剩余数据大于接收得到数据长度，需要缓存下来，等下一个包过来进行拼接
{
if (m_OffsetDelta != m_ParsedLengthInBuffer)
{
Buffer.BlockCopy(readBuffer, offset - m_ParsedLengthInBuffer, readBuffer, offset - m_OffsetDelta, m_ParsedLengthInBuffer + length);
m_ParsedLengthInBuffer += length;
m_OffsetDelta = m_ParsedLengthInBuffer;
}
else
{
m_ParsedLengthInBuffer += length;
if (m_ParsedLengthInBuffer >= m_Session.Config.ReceiveBufferSize)
{
this.AddArraySegment(readBuffer, offset + length - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer, toBeCopied);
m_ParsedLengthInBuffer = 0;
m_OffsetDelta = 0;
return(NullRequestInfo);
}
m_OffsetDelta += length;
}
//m_ParsedLengthInBuffer += length;
//this.AddArraySegment(readBuffer, offset + length - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer, toBeCopied);
//m_ParsedLengthInBuffer = 0;
//m_OffsetDelta = 0;
//////
// m_ParsedLengthInBuffer += length;
// m_ParsedLengthInBuffer = 0;
// m_OffsetDelta = 0;
return(NullRequestInfo);
}
else if (remainlen < 0)//不存在
{
}
}
}
else//没有缓存则需要直接获取数据
{
result = readBuffer.SearchMark(offset, length, m_SearchState);
findLen = result - offset;
if (findLen > 0)//找到包头的数据
{
byte[] headerdata = new byte[findLen];
Buffer.BlockCopy(readBuffer, offset, headerdata, 0, findLen);
ChainProtocol hp = new ChainProtocol();
chainHeader = hp.GetChainHander(headerdata);
if (chainHeader.Method == "GET" || chainHeader.Method == "DELETE")
{
findLen += m_SearchState.Mark.Length;
}
else
{
int contentLen = Convert.ToInt32(chainHeader.Data["Content-Length"]);
packLength = headerdata.Length + contentLen + m_SearchState.Mark.Length;
//包的长度大于接收的长度，则需要缓存下来等下一个包数据过来进行拼接
if (packLength > length)
{
//m_ParsedLengthInBuffer += length;
//this.AddArraySegment(readBuffer, offset + length - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer, toBeCopied);
//m_ParsedLengthInBuffer = 0;
//m_OffsetDelta = 0;
if (m_OffsetDelta != m_ParsedLengthInBuffer)
{
Buffer.BlockCopy(readBuffer, offset - m_ParsedLengthInBuffer, readBuffer, offset - m_OffsetDelta, m_ParsedLengthInBuffer + length);
m_ParsedLengthInBuffer += length;
m_OffsetDelta = m_ParsedLengthInBuffer;
}
else
{
m_ParsedLengthInBuffer += length;
if (m_ParsedLengthInBuffer >= m_Session.Config.ReceiveBufferSize)
{
this.AddArraySegment(readBuffer, offset + length - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer, toBeCopied);
m_ParsedLengthInBuffer = 0;
m_OffsetDelta = 0;
return(NullRequestInfo);
}
m_OffsetDelta += length;
}
return(NullRequestInfo);
}
else if (packLength <= length) //包的长度小于接收的数据长度，则生成该包，并把多余的数据缓存下来
{ //包的长度刚好等于接收的数据长度，则生成该包即可
findLen = packLength;
}
}
}
else//第一个包的数据不够一个包头的长度
{
//m_ParsedLengthInBuffer += length;
//this.AddArraySegment(readBuffer, offset + length - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer, toBeCopied);
//m_ParsedLengthInBuffer = 0;
//m_OffsetDelta = 0;
if (m_OffsetDelta != m_ParsedLengthInBuffer)
{
Buffer.BlockCopy(readBuffer, offset - m_ParsedLengthInBuffer, readBuffer, offset - m_OffsetDelta, m_ParsedLengthInBuffer + length);
m_ParsedLengthInBuffer += length;
m_OffsetDelta = m_ParsedLengthInBuffer;
}
else
{
m_ParsedLengthInBuffer += length;
if (m_ParsedLengthInBuffer >= m_Session.Config.ReceiveBufferSize)
{
this.AddArraySegment(readBuffer, offset + length - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer, toBeCopied);
m_ParsedLengthInBuffer = 0;
m_OffsetDelta = 0;
return(NullRequestInfo);
}
m_OffsetDelta += length;
}
return(NullRequestInfo);
}
}
//计算偏移
rest = length - findLen + prevMatched;
if (findLen > 0)
{
if (this.BufferSegments != null && this.LeftBufferSize > 0)
{
//Debug.WriteLine("包大小{0}，缓存大小{1}，接收大小{2}".FormatString(packLength,this.LeftBufferSize, length));
this.AddArraySegment(readBuffer, offset - m_ParsedLengthInBuffer, findLen + m_ParsedLengthInBuffer, toBeCopied);
requestInfo = ProcessMatchedRequest(BufferSegments, 0, BufferSegments.Count);
}
else
{
requestInfo = ProcessMatchedRequest(readBuffer, offset - m_ParsedLengthInBuffer, findLen + m_ParsedLengthInBuffer);
}
}
else
{
if (this.BufferSegments != null && this.BufferSegments.Count > 0)
{
requestInfo = ProcessMatchedRequest(BufferSegments, 0, BufferSegments.Count);
}
else
{
requestInfo = ProcessMatchedRequest(readBuffer, offset - m_ParsedLengthInBuffer, m_ParsedLengthInBuffer);
}
}
InternalReset();
if (rest == 0)
{
m_OffsetDelta = 0;
}
else
{
m_OffsetDelta += (length - rest);
}
return(requestInfo);
}
/// <summary>
/// 把byte[] source解析成Chain包
/// </summary>
/// <param name="source"></param>
/// <returns></returns>
public ChainPackage ParseRequestInfo(byte[] source)
{
IPackageProtocol <ChainPackage> packageHeadProtocol = new ChainProtocol();
return(packageHeadProtocol.ResolveProtocol(source));
}
internal byte[] ToByte()
{
ChainProtocol cpcl = new ChainProtocol();
return(cpcl.ResolveProtocol(this));
}
