public MsgFrame[] ToFrame(int headerLength = 0)
{
var msg = this;
var dataBuf = msg.ToString();
var dataLen = dataBuf.Length;
var frameLen = MsgFrame.MAX_DATA_LENGTH - headerLength;
var frameCount = (int)Math.Ceiling(dataLen * 1.0 / frameLen);
var frames = new MsgFrame[frameCount];
var id = Counter++;
for (var i = 0; i < frameCount; i++)
{
var takeLength = dataLen >= frameLen ? frameLen : dataLen;
frames[i] = new MsgFrame
{
Id = id,
Target = msg.TargetUser,
Total = frameCount,
Offset = i,
Data = dataBuf.Substring(i * frameLen, takeLength)
};
dataLen -= takeLength;
}
return(frames);
}
/// <summary>
/// 不需要缓存时返回false，需要时返回true
/// </summary>
/// <param name="frame"></param>
/// <returns></returns>
public bool Check(MsgFrame frame)
{
List <MsgFrame> list;
if (!Cache.ContainsKey(frame.Id))
{
list = new List <MsgFrame>(frame.Total);
Cache.Add(frame.Id, list);
}
list = Cache[frame.Id];
list.Add(frame);
return(list.Count != frame.Total);
}