public override async Task ReceiveAsync(WebSocket socket, WebSocketReceiveResult result, byte[] buffer)
{
if (buffer == null || buffer.Length == 0)
{
return;
}
var socketId = WebSocketConnectionManager.GetId(socket);
WSRtspContext wsrtsp = null;
if (ws_rtsps.ContainsKey(socketId))
{
wsrtsp = ws_rtsps[socketId];
}
if (result.MessageType == WebSocketMessageType.Text)
{
string package = Encoding.UTF8.GetString(buffer);
string command = getWSPCommand(package);
string seq = getByKey(package, "seq");
if (command == "INIT")//建立新链接.
{
string host = getByKey(package, "host");
string port = getByKey(package, "port");
if (port == null)
{
port = "554";
}
if (host != null)
{
try
{
RtspProxy rtsp = new RtspProxy();
bool connected = rtsp.Connect(host, Convert.ToInt32(port));
if (connected)
{
rtsp.Start();
wsrtsp = new WSRtspContext(socket, rtsp, false);
wsrtsp.ControlWebSocketId = socketId;
ws_rtsps.TryAdd(socketId, wsrtsp);
wsrtsp.Seq = seq;
//返回握手.
WSRtspResponse response = new WSRtspResponse();
response.Seq = seq;
response.Shakehand = true;
response.Channel = socketId;
await socket.SendAsync(response.ToArray(), WebSocketMessageType.Text, true, CancellationToken.None);
//启动接受rtsp控制报文，发送给ws.
await wsrtsp.StartReceive();
}
else
{
await removeSocket(wsrtsp);
return;
}
}
catch (Exception ex)
{
//Logger.Error(String.Format("connect to rtsp {0} Error:{1}", package, ex.Message));
return;
}
}
}
else if (command == "JOIN")//建立数据通道.
{
string channel = getByKey(package, "channel");
if (channel != null && ws_rtsps.ContainsKey(channel))
{
WSRtspContext controlwsrtsp = ws_rtsps[channel];
controlwsrtsp.DataWebSocketId = socketId;
WSRtspContext datawsrtsp = new WSRtspContext(socket, controlwsrtsp.Rtsp, true);
datawsrtsp.ControlWebSocketId = controlwsrtsp.ControlWebSocketId;
datawsrtsp.DataWebSocketId = socketId;
ws_rtsps.TryAdd(socketId, datawsrtsp);
//返回握手.
WSRtspResponse response = new WSRtspResponse();
response.Seq = seq;
await socket.SendAsync(response.ToArray(), WebSocketMessageType.Text, true, CancellationToken.None);
//启动接受rtsp数据报文，发送给ws.
await datawsrtsp.StartReceive();
}
return;
}//WSP/1.1 JOIN channel: 127.0.0.1 - 2 18467 seq: 3
else
{
wsrtsp.Seq = seq;
try
{
await wsrtsp.Send(getRtspBuffer(package));
}
catch
{
await removeSocket(wsrtsp);
}
}
}
else if (wsrtsp != null)
{
try
{
await wsrtsp.Send(buffer);
}
catch
{
await removeSocket(wsrtsp);
}
}//WebSocketMessageType.Data
}
public WSRtspContext(WebSocket ws, RtspProxy rtsp, bool dataChannel)
{
_ws = ws;
_rtsp = rtsp;
_dataChannel = dataChannel;
}