public MsgReciver()
{
seqInfo = new ParsePacketMetaResult()
{
nextOffset = 0,
found = false,
dsplen = 0,
contnetLen = 0
};
dataPart = new ParsePacketMetaResult()
{
nextOffset = 0,
found = false,
dsplen = 0,
contnetLen = 0
};
sleepspan = new TimeSpan(0, 0, 0, 0, 10);
}
ParsePacketMetaResult parseEachChunkOfPacket(byte[] array, int arycount)
{
int len = arycount;
if (len > 5)
{
len = 5;
}
ParsePacketMetaResult res = new ParsePacketMetaResult();
for (int i = 0; i < len; i++)
{
res.contnetLen = (res.contnetLen << (i * 7)) | (buf[i] & 0x7F);
if (buf[i] >= 0x80)
{
res.found = true;
res.dsplen = i + 1;
break;
}
}
return(res);
}
Task <ParsePacketMetaResult> receive_inner(WebSocket socket, byte[] ary, int offset)
{
return(socket.ReceiveAsync(ary, CancellationToken.None).ContinueWith(t => {
var receiveRes = t.Result;
var rcvedCount = receiveRes.Count;
ParsePacketMetaResult ret;
ret.nextOffset = offset + rcvedCount;
if (ret.nextOffset > 0)
{
ret = parseEachChunkOfPacket(ary, ret.nextOffset);
return ret;
}
else
{
ret = new ParsePacketMetaResult()
{
found = false,
dsplen = 0,
contnetLen = 0
};
}
return ret;
}));
}
public (SmsgClientReq req, byte[] data) Receive(HttpContext context, WebSocket socket)
{
//
// msgPart
//
do
{
var t = receive_inner(socket, buf, seqInfo.nextOffset);
t.Wait();
seqInfo = t.Result;
} while (!seqInfo.found && Sleep(new TimeSpan(0, 0, 0, 0, 10)));
while (seqInfo.dsplen + seqInfo.contnetLen < seqInfo.nextOffset && Sleep(sleepspan))
{
var t = receive_inner(socket, buf, seqInfo.nextOffset);
t.Wait();
}
var msg = SmsgClientReq.Parser.ParseFrom(buf, seqInfo.dsplen, seqInfo.contnetLen);
// preparing for datapart;
var leftlen = seqInfo.nextOffset - seqInfo.dsplen - seqInfo.contnetLen;
if (leftlen > 0)
{
//TODO: we need to cut off this logic for better performance in the future
buf.CopyTo(buf, seqInfo.dsplen + seqInfo.contnetLen);
seqInfo.nextOffset = leftlen;
}
seqInfo.found = false;
seqInfo.dsplen = 0;
seqInfo.contnetLen = 0;
//
// dataPart
//
do
{
var t = receive_inner(socket, buf, seqInfo.nextOffset);
t.Wait();
seqInfo = t.Result;
} while (!seqInfo.found && Sleep(sleepspan));
while (seqInfo.dsplen + seqInfo.contnetLen < seqInfo.nextOffset && Sleep(sleepspan))
{
var t = receive_inner(socket, buf, seqInfo.nextOffset);
t.Wait();
}
var data = new ArraySegment <byte>(buf, seqInfo.dsplen, seqInfo.contnetLen).ToArray();
//preparing for next msgPart
leftlen = seqInfo.nextOffset - seqInfo.dsplen - seqInfo.contnetLen;
if (leftlen > 0)
{
buf.CopyTo(buf, seqInfo.dsplen + seqInfo.contnetLen);
seqInfo.nextOffset = leftlen;
}
//build a result
return(msg, data);
}
