public void OnData(byte[] data, int offset, int length)
{
try {
this._readStream.Write(data, offset, length);
while (this._readStream.Length >= this._needLenth)
{
if (this._packetState == PacketState.ReadHead)
{
if (this._readStream.Length >= this._needLenth) //头部读取完毕
{
long originPos = this._readStream.Position;
this._readStream.Position = 0;
this._readStream.Read(this.headBytes, 0, this.headBytes.Length); //从头部取出内容长度
int tmpIndex = 0;
this._bodyLength = BitConverterNoAlloc.ToInt32(this.headBytes, ref tmpIndex);
this._needLenth = this._bodyLength + this.headBytes.Length; //头部仍然在流中，所以加上头部的长度
this._packetState = PacketState.ReadBody;
this._readStream.Position = originPos; //恢复流位置
}
}
if (this._packetState == PacketState.ReadBody)
{
if (this._readStream.Length >= this._needLenth) //内容读取完毕
{
ArraySegment <byte> buffer;
if (!this._readStream.TryGetBuffer(out buffer))
{
throw new Exception("Get Buffer From Stream Error");
}
//先将剩余部分写在交换流中
int remainLength = (int)(this._readStream.Length - this._needLenth);
this._packetSwapStream.Write(buffer.Array, this._needLenth, remainLength);
//定位到内容部分并调用回调
this._readStream.SetLength(this._needLenth);
this._readStream.Position = this.headBytes.Length;
this._onPacket(this._readStream);
//重置包接收流并将剩余部分写入包接收流
this._readStream.Position = 0;
this._readStream.SetLength(0);
this._packetSwapStream.WriteTo(this._readStream);
//重置交换流
this._packetSwapStream.Position = 0;
this._packetSwapStream.SetLength(0);
ResetPacket();
}
}
}
} catch (Exception e) {
this._onError(e);
}
}
