mirror of
https://github.com/BililiveRecorder/BililiveRecorder.git
synced 2024-11-16 11:42:22 +08:00
393 lines
13 KiB
C#
393 lines
13 KiB
C#
using BililiveRecorder.Core.Config;
|
||
using NLog;
|
||
using System;
|
||
using System.IO;
|
||
using System.Linq;
|
||
using System.Net;
|
||
using System.Net.Sockets;
|
||
using System.Text;
|
||
using System.Threading;
|
||
using System.Threading.Tasks;
|
||
using System.Xml;
|
||
using Timer = System.Timers.Timer;
|
||
|
||
namespace BililiveRecorder.Core
|
||
{
|
||
/**
|
||
* 直播状态监控
|
||
* 分为弹幕连接和HTTP轮询两部分
|
||
*
|
||
* 弹幕连接：
|
||
* 一直保持连接，并把收到的弹幕保存到数据库
|
||
*
|
||
* HTTP轮询：
|
||
* 只有在监控启动时运行，根据直播状态触发事件
|
||
*
|
||
*
|
||
* */
|
||
public class StreamMonitor : IStreamMonitor
|
||
{
|
||
private static readonly Logger logger = LogManager.GetCurrentClassLogger();
|
||
private const string defaulthosts = "broadcastlv.chat.bilibili.com";
|
||
private const string CIDInfoUrl = "https://live.bilibili.com/api/player?id=cid:";
|
||
|
||
private readonly Func<TcpClient> funcTcpClient;
|
||
private readonly ConfigV1 config;
|
||
|
||
private int dmChatPort = 2243;
|
||
private string dmChatHost = defaulthosts;
|
||
#pragma warning disable IDE1006 // 命名样式
|
||
private bool dmTcpConnected => dmClient?.Connected ?? false;
|
||
#pragma warning restore IDE1006 // 命名样式
|
||
private Exception dmError = null;
|
||
private TcpClient dmClient;
|
||
private NetworkStream dmNetStream;
|
||
private Thread dmReceiveMessageLoopThread;
|
||
private CancellationTokenSource dmTokenSource = null;
|
||
private readonly Timer httpTimer;
|
||
|
||
public int Roomid { get; private set; } = 0;
|
||
public bool IsMonitoring { get; private set; } = false;
|
||
public event StreamStatusChangedEvent StreamStatusChanged;
|
||
public event ReceivedDanmakuEvt ReceivedDanmaku;
|
||
|
||
public StreamMonitor(int roomid, Func<TcpClient> funcTcpClient, ConfigV1 config)
|
||
{
|
||
this.funcTcpClient = funcTcpClient;
|
||
this.config = config;
|
||
|
||
Roomid = roomid;
|
||
|
||
ReceivedDanmaku += Receiver_ReceivedDanmaku;
|
||
|
||
dmTokenSource = new CancellationTokenSource();
|
||
Repeat.Interval(TimeSpan.FromSeconds(30), () =>
|
||
{
|
||
if (dmNetStream != null && dmNetStream.CanWrite)
|
||
{
|
||
try
|
||
{
|
||
SendSocketData(2);
|
||
}
|
||
catch (Exception) { }
|
||
}
|
||
}, dmTokenSource.Token);
|
||
|
||
httpTimer = new Timer(config.TimingCheckInterval * 1000)
|
||
{
|
||
Enabled = false,
|
||
AutoReset = true,
|
||
SynchronizingObject = null,
|
||
Site = null
|
||
};
|
||
httpTimer.Elapsed += (sender, e) =>
|
||
{
|
||
try
|
||
{
|
||
Check(TriggerType.HttpApi);
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
logger.Log(Roomid, LogLevel.Warn, "获取直播间开播状态出错", ex);
|
||
}
|
||
};
|
||
|
||
config.PropertyChanged += (sender, e) =>
|
||
{
|
||
if (e.PropertyName.Equals(nameof(config.TimingCheckInterval)))
|
||
{
|
||
httpTimer.Interval = config.TimingCheckInterval * 1000;
|
||
}
|
||
};
|
||
|
||
Task.Run(() => ConnectWithRetry());
|
||
}
|
||
|
||
private void Receiver_ReceivedDanmaku(object sender, ReceivedDanmakuArgs e)
|
||
{
|
||
switch (e.Danmaku.MsgType)
|
||
{
|
||
case MsgTypeEnum.LiveStart:
|
||
Task.Run(() => StreamStatusChanged?.Invoke(this, new StreamStatusChangedArgs() { type = TriggerType.Danmaku }));
|
||
break;
|
||
case MsgTypeEnum.LiveEnd:
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
#region 对外API
|
||
|
||
public bool Start()
|
||
{
|
||
if (disposedValue)
|
||
{
|
||
throw new ObjectDisposedException(nameof(StreamMonitor));
|
||
}
|
||
|
||
IsMonitoring = true;
|
||
httpTimer.Start();
|
||
Check(TriggerType.HttpApi);
|
||
return true;
|
||
}
|
||
|
||
public void Stop()
|
||
{
|
||
if (disposedValue)
|
||
{
|
||
throw new ObjectDisposedException(nameof(StreamMonitor));
|
||
}
|
||
|
||
IsMonitoring = false;
|
||
httpTimer.Stop();
|
||
}
|
||
|
||
public void Check(TriggerType type, int millisecondsDelay = 0)
|
||
{
|
||
if (disposedValue)
|
||
{
|
||
throw new ObjectDisposedException(nameof(StreamMonitor));
|
||
}
|
||
|
||
if (millisecondsDelay < 0)
|
||
{
|
||
throw new ArgumentOutOfRangeException(nameof(millisecondsDelay), "不能小于0");
|
||
}
|
||
|
||
Task.Run(() =>
|
||
{
|
||
Task.Delay(millisecondsDelay).Wait();
|
||
if (BililiveAPI.GetRoomInfo(Roomid).isStreaming)
|
||
{
|
||
StreamStatusChanged?.Invoke(this, new StreamStatusChangedArgs() { type = type });
|
||
}
|
||
});
|
||
}
|
||
|
||
#endregion
|
||
#region 弹幕连接
|
||
|
||
private void ConnectWithRetry()
|
||
{
|
||
bool connect_result = false;
|
||
while (!dmTcpConnected && !dmTokenSource.Token.IsCancellationRequested)
|
||
{
|
||
Thread.Sleep((int)Math.Max(config.TimingDanmakuRetry, 0));
|
||
logger.Log(Roomid, LogLevel.Info, "连接弹幕服务器...");
|
||
connect_result = Connect();
|
||
}
|
||
|
||
if (connect_result)
|
||
{
|
||
logger.Log(Roomid, LogLevel.Info, "弹幕服务器连接成功");
|
||
}
|
||
}
|
||
|
||
private bool Connect()
|
||
{
|
||
if (dmTcpConnected) { return true; }
|
||
|
||
try
|
||
{
|
||
FetchServerAddress(Roomid, ref dmChatHost, ref dmChatPort);
|
||
|
||
dmClient = funcTcpClient();
|
||
dmClient.Connect(dmChatHost, dmChatPort);
|
||
dmNetStream = dmClient.GetStream();
|
||
|
||
dmReceiveMessageLoopThread = new Thread(ReceiveMessageLoop)
|
||
{
|
||
Name = "ReceiveMessageLoop " + Roomid,
|
||
IsBackground = true
|
||
};
|
||
dmReceiveMessageLoopThread.Start();
|
||
|
||
SendSocketData(7, "{\"roomid\":" + Roomid + ",\"uid\":0}");
|
||
SendSocketData(2);
|
||
|
||
return true;
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
dmError = ex;
|
||
logger.Log(Roomid, LogLevel.Error, "连接弹幕服务器错误", ex);
|
||
|
||
return false;
|
||
}
|
||
}
|
||
|
||
private void ReceiveMessageLoop()
|
||
{
|
||
logger.Trace("ReceiveMessageLoop Started! " + Roomid);
|
||
try
|
||
{
|
||
var stableBuffer = new byte[dmClient.ReceiveBufferSize];
|
||
while (dmTcpConnected)
|
||
{
|
||
dmNetStream.ReadB(stableBuffer, 0, 4);
|
||
var packetlength = BitConverter.ToInt32(stableBuffer, 0);
|
||
packetlength = IPAddress.NetworkToHostOrder(packetlength);
|
||
|
||
if (packetlength < 16)
|
||
{
|
||
throw new NotSupportedException("协议失败: (L:" + packetlength + ")");
|
||
}
|
||
|
||
dmNetStream.ReadB(stableBuffer, 0, 2);//magic
|
||
dmNetStream.ReadB(stableBuffer, 0, 2);//protocol_version
|
||
dmNetStream.ReadB(stableBuffer, 0, 4);
|
||
var typeId = BitConverter.ToInt32(stableBuffer, 0);
|
||
typeId = IPAddress.NetworkToHostOrder(typeId);
|
||
|
||
dmNetStream.ReadB(stableBuffer, 0, 4);//magic, params?
|
||
var playloadlength = packetlength - 16;
|
||
if (playloadlength == 0)
|
||
{
|
||
continue;//没有内容了
|
||
}
|
||
|
||
typeId = typeId - 1;//和反编译的代码对应
|
||
var buffer = new byte[playloadlength];
|
||
dmNetStream.ReadB(buffer, 0, playloadlength);
|
||
switch (typeId)
|
||
{
|
||
case 0:
|
||
case 1:
|
||
case 2:
|
||
{
|
||
var viewer = BitConverter.ToUInt32(buffer.Take(4).Reverse().ToArray(), 0); //观众人数
|
||
break;
|
||
}
|
||
case 3:
|
||
case 4://playerCommand
|
||
{
|
||
var json = Encoding.UTF8.GetString(buffer, 0, playloadlength);
|
||
try
|
||
{
|
||
ReceivedDanmaku?.Invoke(this, new ReceivedDanmakuArgs() { Danmaku = new DanmakuModel(json) });
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
logger.Warn(ex);
|
||
}
|
||
break;
|
||
}
|
||
case 5://newScrollMessage
|
||
case 7:
|
||
case 16:
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
dmError = ex;
|
||
// logger.Error(ex);
|
||
|
||
logger.Debug("Disconnected " + Roomid);
|
||
dmClient?.Close();
|
||
dmNetStream = null;
|
||
if (!(dmTokenSource?.IsCancellationRequested ?? true))
|
||
{
|
||
logger.Warn(ex, "弹幕连接被断开，将尝试重连");
|
||
ConnectWithRetry();
|
||
}
|
||
}
|
||
}
|
||
|
||
private void SendSocketData(int action, string body = "")
|
||
{
|
||
const int param = 1;
|
||
const short magic = 16;
|
||
const short ver = 1;
|
||
|
||
var playload = Encoding.UTF8.GetBytes(body);
|
||
var buffer = new byte[(playload.Length + 16)];
|
||
|
||
using (var ms = new MemoryStream(buffer))
|
||
{
|
||
var b = BitConverter.GetBytes(buffer.Length).ToBE();
|
||
ms.Write(b, 0, 4);
|
||
b = BitConverter.GetBytes(magic).ToBE();
|
||
ms.Write(b, 0, 2);
|
||
b = BitConverter.GetBytes(ver).ToBE();
|
||
ms.Write(b, 0, 2);
|
||
b = BitConverter.GetBytes(action).ToBE();
|
||
ms.Write(b, 0, 4);
|
||
b = BitConverter.GetBytes(param).ToBE();
|
||
ms.Write(b, 0, 4);
|
||
if (playload.Length > 0)
|
||
{
|
||
ms.Write(playload, 0, playload.Length);
|
||
}
|
||
dmNetStream.Write(buffer, 0, buffer.Length);
|
||
dmNetStream.Flush();
|
||
}
|
||
}
|
||
|
||
private static void FetchServerAddress(int roomid, ref string chatHost, ref int chatPort)
|
||
{
|
||
try
|
||
{
|
||
var request2 = WebRequest.Create(CIDInfoUrl + roomid);
|
||
request2.Timeout = 2000;
|
||
using (var stream = request2.GetResponse().GetResponseStream())
|
||
using (var sr = new StreamReader(stream))
|
||
{
|
||
XmlDocument doc = new XmlDocument();
|
||
doc.LoadXml("<root>" + sr.ReadToEnd() + "</root>");
|
||
chatHost = doc["root"]["dm_server"].InnerText;
|
||
chatPort = int.Parse(doc["root"]["dm_port"].InnerText);
|
||
}
|
||
}
|
||
catch (WebException ex)
|
||
{
|
||
HttpWebResponse errorResponse = ex.Response as HttpWebResponse;
|
||
if (errorResponse?.StatusCode == HttpStatusCode.NotFound)
|
||
{ // 直播间不存在（HTTP 404）
|
||
logger.Log(roomid, LogLevel.Warn, "该直播间疑似不存在", ex);
|
||
}
|
||
else
|
||
{ // B站服务器响应错误
|
||
logger.Log(roomid, LogLevel.Warn, "B站服务器响应弹幕服务器地址出错", ex);
|
||
}
|
||
}
|
||
catch (Exception ex)
|
||
{ // 其他错误（XML解析错误？）
|
||
logger.Log(roomid, LogLevel.Warn, "获取弹幕服务器地址时出现未知错误", ex);
|
||
}
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region IDisposable Support
|
||
private bool disposedValue = false; // 要检测冗余调用
|
||
|
||
protected virtual void Dispose(bool disposing)
|
||
{
|
||
if (!disposedValue)
|
||
{
|
||
if (disposing)
|
||
{
|
||
dmTokenSource?.Cancel();
|
||
dmTokenSource?.Dispose();
|
||
httpTimer?.Dispose();
|
||
dmClient?.Close();
|
||
}
|
||
|
||
dmNetStream = null;
|
||
disposedValue = true;
|
||
}
|
||
}
|
||
|
||
public void Dispose()
|
||
{
|
||
// 请勿更改此代码。将清理代码放入以上 Dispose(bool disposing) 中。
|
||
Dispose(true);
|
||
}
|
||
#endregion
|
||
}
|
||
}
|