protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
await Task.Run(() => {
while (true)
{
try
{
var hasSessions = HttpSessionManager.GetAll().Where(m => DateTime.Now.Subtract(m.StartTime).TotalSeconds > 60 && m.RTPVideoType == Metadata.RTPVideoType.Http_Hls).ToList();//所有http 的 hls短链接
foreach (var item in hasSessions)
{
var key = $"{item.Sim}_{item.ChannelNo}";
HttpSessionManager.TryRemove(item.SessionId);//超过120s未访问。
//清楚所有hls文件
string filepath = Path.Combine(Configuration.HlsRootDirectory, key);
if (Directory.Exists(filepath))
{
Directory.Delete(filepath, true);
}
hLSPathStorage.RemoveAllPath(key);//移除所有缓存
if (logger.IsEnabled(LogLevel.Debug))
{
logger.LogDebug($"{System.Text.Json.JsonSerializer.Serialize(item)},清楚session");
}
var hasTcpSession = HttpSessionManager.GetAllBySimAndChannelNo(item.Sim.TrimStart('0'), item.ChannelNo).Any(m => m.IsWebSocket); //是否存在tcp的 socket链接
var httpFlvSession = HttpSessionManager.GetAllBySimAndChannelNo(item.Sim.TrimStart('0'), item.ChannelNo).Any(m => m.RTPVideoType == Metadata.RTPVideoType.Http_Flv); //是否存在http的 flv长链接
if (!hasTcpSession && !httpFlvSession)
{
//不存在websocket链接和http-flv链接时，主动断开设备链接以节省流量
//移除tcpsession,断开设备链接
if (SessionManager != null)
{
SessionManager.RemoveByTerminalPhoneNo(item.Sim.TrimStart('0'));
}
}
}
}
catch (Exception ex)
{
logger.LogError(ex, ex.Message);
}
Thread.Sleep(TimeSpan.FromSeconds(30));//30s 执行一次
}
}, stoppingToken);
}
private async ValueTask ProcessRequestAsync(HttpListenerContext context, IPrincipal principal)
{
if (context.Request.RawUrl.StartsWith("/favicon.ico"))
{
context.Http404();
return;
}
if (context.Request.RawUrl.Contains(".m3u8") || context.Request.RawUrl.Contains(".ts"))
{
hLSRequestManager.HandleHlsRequest(context, principal);
return;
}
if (Logger.IsEnabled(LogLevel.Trace))
{
Logger.LogTrace($"[http RequestTraceIdentifier]:{context.Request.RequestTraceIdentifier.ToString()}-{context.Request.RemoteEndPoint.ToString()}");
}
if (Logger.IsEnabled(LogLevel.Trace))
{
Logger.LogTrace($"[http RequestTraceIdentifier]:{context.Request.RequestTraceIdentifier.ToString()}-{context.Request.RemoteEndPoint.ToString()}");
}
string sim = context.Request.QueryString.Get("sim");
string channel = context.Request.QueryString.Get("channel");
if (string.IsNullOrEmpty(sim) || string.IsNullOrEmpty(channel))
{
await context.Http400();
return;
}
int.TryParse(channel, out int channelNo);
if (context.Request.IsWebSocketRequest)
{
HttpListenerWebSocketContext wsContext = await context.AcceptWebSocketAsync(null, keepAliveInterval : TimeSpan.FromSeconds(5));
var jT1078HttpContext = new JT1078HttpContext(context, wsContext, principal);
jT1078HttpContext.Sim = sim;
jT1078HttpContext.ChannelNo = channelNo;
jT1078HttpContext.RTPVideoType = RTPVideoType.Ws_Flv;
SessionManager.TryAdd(jT1078HttpContext);
//这个发送出去，flv.js就报错了
//await jT1078HttpContext.WebSocketSendHelloAsync();
await Task.Factory.StartNew(async(state) =>
{
//https://www.bejson.com/httputil/websocket/
//ws://localhost:15555?token=22&sim=1221&channel=1
var websocketContext = state as JT1078HttpContext;
while (websocketContext.WebSocketContext.WebSocket.State == WebSocketState.Open ||
websocketContext.WebSocketContext.WebSocket.State == WebSocketState.Connecting)
{
var buffer = ArrayPool <byte> .Shared.Rent(256);
try
{
//客户端主动断开需要有个线程去接收通知,不然会客户端会卡死直到超时
WebSocketReceiveResult receiveResult = await websocketContext.WebSocketContext.WebSocket.ReceiveAsync(buffer, CancellationToken.None);
if (receiveResult.EndOfMessage)
{
if (receiveResult.Count > 0)
{
var data = buffer.AsSpan().Slice(0, receiveResult.Count).ToArray();
if (Logger.IsEnabled(LogLevel.Trace))
{
Logger.LogTrace($"[ws receive]:{Encoding.UTF8.GetString(data)}");
}
await websocketContext.WebSocketSendTextAsync(data);
}
}
}
finally
{
ArrayPool <byte> .Shared.Return(buffer);
}
}
if (Logger.IsEnabled(LogLevel.Information))
{
Logger.LogInformation($"[ws close]:{websocketContext.SessionId}-{websocketContext.Sim}-{websocketContext.ChannelNo}-{websocketContext.StartTime:yyyyMMddhhmmss}");
}
SessionManager.TryRemove(websocketContext.SessionId);
}, jT1078HttpContext);
}
else
{
var jT1078HttpContext = new JT1078HttpContext(context, principal);
jT1078HttpContext.Sim = sim;
jT1078HttpContext.RTPVideoType = RTPVideoType.Http_Flv;
jT1078HttpContext.ChannelNo = channelNo;
SessionManager.TryAdd(jT1078HttpContext);
}
}
private async ValueTask ProcessRequestAsync(HttpListenerContext context, IPrincipal principal)
{
if (context.Request.RawUrl.StartsWith("/favicon.ico"))
{
context.Http404();
return;
}
var uri = new Uri(context.Request.RawUrl);
string url = uri.AbsolutePath;
var queryParams = uri.Query.Substring(1, uri.Query.Length - 1).Split('&');
if (queryParams.Length < 2)
{
context.Http404();
return;
}
if (url.EndsWith(".m3u8") || url.EndsWith(".ts"))
{
string key = $"{queryParams[0].Split('=')[1]}_{queryParams[1].Split('=')[1]}";//默认queryParams第一个参数是终端号，第二个参数是通道号
memoryCache.GetOrCreate(key, (cacheEntry) => {
cacheEntry.SetSlidingExpiration(TimeSpan.FromSeconds(20));
cacheEntry.RegisterPostEvictionCallback((key, value, reason, state) => {
//当清空httpssion时，同时清除tcpsseion
});
return(DateTime.Now);
});
string filename = Path.GetFileName(url);
string filepath = Path.Combine(Configuration.HlsRootDirectory, key, filename);
if (!File.Exists(filepath))
{
context.Http404();
return;
}
try
{
using (FileStream sr = new FileStream(filepath, FileMode.Open))
{
context.Response.ContentLength64 = sr.Length;
await sr.CopyToAsync(context.Response.OutputStream);
}
string ext = Path.GetExtension(filename);
if (ext == ".m3u8")
{
context.Response.ContentType = m3u8Mime;
}
else if (ext == ".ts")
{
context.Response.ContentType = tsMime;
}
context.Response.StatusCode = (int)HttpStatusCode.OK;
}
catch (Exception ex)
{
Logger.LogError(ex, $"{context.Request.RawUrl}");
context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
}
finally
{
context.Response.OutputStream.Close();
context.Response.Close();
}
return;
}
if (Logger.IsEnabled(LogLevel.Trace))
{
Logger.LogTrace($"[http RequestTraceIdentifier]:{context.Request.RequestTraceIdentifier.ToString()}-{context.Request.RemoteEndPoint.ToString()}");
}
string sim = context.Request.QueryString.Get("sim");
string channel = context.Request.QueryString.Get("channel");
if (string.IsNullOrEmpty(sim) || string.IsNullOrEmpty(channel))
{
await context.Http400();
return;
}
int.TryParse(channel, out int channelNo);
if (context.Request.IsWebSocketRequest)
{
HttpListenerWebSocketContext wsContext = await context.AcceptWebSocketAsync(null, keepAliveInterval : TimeSpan.FromSeconds(5));
var jT1078HttpContext = new JT1078HttpContext(context, wsContext, principal);
jT1078HttpContext.Sim = sim;
jT1078HttpContext.ChannelNo = channelNo;
SessionManager.TryAdd(jT1078HttpContext);
await jT1078HttpContext.WebSocketSendHelloAsync();
await Task.Factory.StartNew(async(state) =>
{
//https://www.bejson.com/httputil/websocket/
//ws://localhost:15555?token=22&sim=1221&channel=1
var websocketContext = state as JT1078HttpContext;
while (websocketContext.WebSocketContext.WebSocket.State == WebSocketState.Open ||
websocketContext.WebSocketContext.WebSocket.State == WebSocketState.Connecting)
{
var buffer = ArrayPool <byte> .Shared.Rent(256);
try
{
//客户端主动断开需要有个线程去接收通知,不然会客户端会卡死直到超时
WebSocketReceiveResult receiveResult = await websocketContext.WebSocketContext.WebSocket.ReceiveAsync(buffer, CancellationToken.None);
if (receiveResult.EndOfMessage)
{
if (receiveResult.Count > 0)
{
var data = buffer.AsSpan().Slice(0, receiveResult.Count).ToArray();
if (Logger.IsEnabled(LogLevel.Trace))
{
Logger.LogTrace($"[ws receive]:{Encoding.UTF8.GetString(data)}");
}
await websocketContext.WebSocketSendTextAsync(data);
}
}
}
finally
{
ArrayPool <byte> .Shared.Return(buffer);
}
}
if (Logger.IsEnabled(LogLevel.Information))
{
Logger.LogInformation($"[ws close]:{websocketContext.SessionId}-{websocketContext.Sim}-{websocketContext.ChannelNo}-{websocketContext.StartTime:yyyyMMddhhmmss}");
}
SessionManager.TryRemove(websocketContext.SessionId);
}, jT1078HttpContext);
}
else
{
var jT1078HttpContext = new JT1078HttpContext(context, principal);
jT1078HttpContext.Sim = sim;
jT1078HttpContext.ChannelNo = channelNo;
SessionManager.TryAdd(jT1078HttpContext);
}
}
