/// <summary>
/// 循环读取消息,禁止重复调用
/// </summary>
/// <returns></returns>
public async Task ReadMessageLoop()
{
while (_connected)
{
var headBuffer = new byte[ProtocolHeadLength];
//先读取一次头信息
await _roomStream.ReadAsync(headBuffer, 0, ProtocolHeadLength);
//解析头信息
DanmuHead danmuHead = DanmuHead.BufferToDanmuHead(headBuffer);
//判断协议
if (danmuHead.HeaderLength != ProtocolHeadLength)
{
continue;
}
//初始化一个放数据的byte数组
byte[] dataBuffer;
if (danmuHead.Action == 3)
{
//给服务器发送心跳信息后的回应信息,所带的数据是直播间的观看人数(人气值)
dataBuffer = new byte[danmuHead.MessageLength()];
await _roomStream.ReadAsync(dataBuffer, 0, danmuHead.MessageLength());
var audiences = EndianBitConverter.EndianBitConverter.BigEndian.ToInt32(dataBuffer, 0);
_messageHandler.AudiencesHandlerAsync(audiences);
continue;
}
string tmpData;
JObject json = null;
if (danmuHead.Action == 5 && danmuHead.Version == ProtocolVersion)
{
//有效负载为礼物、弹幕、公告等内容数据
//读取数据放入缓冲区
dataBuffer = new byte[danmuHead.MessageLength()];
await _roomStream.ReadAsync(dataBuffer, 0, danmuHead.MessageLength());
//之后把数据放入到内存流
string jsonStr;
using (var ms = new MemoryStream(dataBuffer, 2, danmuHead.MessageLength() - 2))
{
//使用内存流生成解压流(压缩流)
var deflate = new DeflateStream(ms, CompressionMode.Decompress);
var headerbuffer = new byte[ProtocolHeadLength];
try
{
while (true)
{
await deflate.ReadAsync(headerbuffer, 0, ProtocolHeadLength);
danmuHead = DanmuHead.BufferToDanmuHead(headerbuffer);
var messageBuffer = new byte[danmuHead.MessageLength()];
var readLength = await deflate.ReadAsync(messageBuffer, 0, danmuHead.MessageLength());
jsonStr = Encoding.UTF8.GetString(messageBuffer, 0, danmuHead.MessageLength());
if (readLength == 0)
{
break;
}
json = JObject.Parse(jsonStr);
_messageDispatcher.DispatchAsync(json, _messageHandler);
}
continue;
}
catch (Exception e)
{
//读数据超出长度
Debug.WriteLine(e);
throw;
}
}
}
dataBuffer = new byte[danmuHead.MessageLength()];
await _roomStream.ReadAsync(dataBuffer, 0, danmuHead.MessageLength());
tmpData = Encoding.UTF8.GetString(dataBuffer);
try
{
json = JObject.Parse(tmpData);
}
catch (Exception e)
{
Debug.WriteLine(e);
throw e;
}
if (!"DANMU_MSG".Equals(json["cmd"].ToString()) && !"SEND_GIFT".Equals(json["cmd"].ToString()))
{
_messageDispatcher.DispatchAsync(json, _messageHandler);
}
}
}
