/// <summary>
/// 解析客戶端信息
/// </summary>
/// <param name="data"></param>
/// <param name="readState"></param>
/// <param name="processFrame"></param>
/// <returns>[0]:FrameType [1]:byte[]</returns>
private static object[] ParseData(List<byte> data, ReadState readState)
{
while (data.Count >= 2)
{
var isFinal = (data[0] & 128) != 0; //0x80
var reservedBits = (data[0] & 112);
var frameType = (FrameType)(data[0] & 15);
var isMasked = (data[1] & 128) != 0;//0x80
var length = (data[1] & 127); //0x7F
if (!isMasked)
{
//暫時不處理無掩碼的數據
return new object[] { "", "" };
}
var index = 2;
int payloadLength;
if (length == 127)
{
//if (data.Count < index + 8)
// return; //Not complete
payloadLength = data.Skip(index).Take(8).ToArray().ToLittleEndianInt();
index += 8;
}
else if (length == 126)
{
//if (data.Count < index + 2)
// return; //Not complete
payloadLength = data.Skip(index).Take(2).ToArray().ToLittleEndianInt();
index += 2;
}
else
{
payloadLength = length;
}
//if (data.Count < index + 4)
// return; //Not complete
var maskBytes = data.Skip(index).Take(4).ToArray();
index += 4;
//if (data.Count < index + payloadLength)
// return; //Not complete
var payload = data
.Skip(index)
.Take(payloadLength)
.Select((x, i) => (byte)(x ^ maskBytes[i % 4]));
readState.Data.AddRange(payload);
data.RemoveRange(0, index + payloadLength);
if (frameType != FrameType.Continuation)
readState.FrameType = frameType;
if (isFinal && readState.FrameType.HasValue)
{
byte[] stateData = readState.Data.ToArray();
FrameType stateFrameType = (FrameType)readState.FrameType;
readState.Clear();
//Done
return ProcessFrame(stateFrameType, stateData);
}
}
return new object[] { "", "" };
}
/// <summary>
/// 接收并處理客戶端信息
/// </summary>
/// <param name="clientSkt"></param>
/// <returns></returns>
public static object[] GetClientData(Socket clientSkt)
{
ReadState readState = new ReadState();
int blockLength = MSGINFOHEAD.BodyLength + MSGINFOHEAD.TypeLength + MSGINFOHEAD.TerminalLength + MSGINFOHEAD.TerminalNameLength + MSGINFOHEAD.TicksLength + MSGINFOHEAD.ReciveObjLength + MSGINFOHEAD.GuidLength + MSGINFOHEAD.BlankLength;
List<byte> data = new List<byte>();
var buffer = new byte[blockLength];
Read(data, buffer, clientSkt);
if (data.Count > 0)
{
return ParseData(data, readState);
}
else
{
return new object[] { "", "" };
}
}
