initiating a live casting
parent
c00ba49281
commit
5d378da97a
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Net.WebSockets;
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using System.Security.Claims;
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using System.Threading;
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using System.Threading.Tasks;
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using Microsoft.AspNet.Mvc;
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using Microsoft.Extensions.Logging;
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using Yavsc.ViewModels.Streaming;
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namespace Yavsc.Controllers.Communicating
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{
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public class LiveController : Controller
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{
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ILogger _logger;
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public static ConcurrentDictionary<string, LiveCastMeta> Casters = new ConcurrentDictionary<string, LiveCastMeta>();
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public LiveController(LoggerFactory loggerFactory)
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{
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_logger = loggerFactory.CreateLogger<LiveController>();
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}
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public async Task<IActionResult> Cast()
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{
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var uname = User.GetUserName();
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// ensure this request is for a websocket
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if (!HttpContext.WebSockets.IsWebSocketRequest) return new BadRequestResult();
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// ensure uniqueness of casting stream from this user
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var existent = Casters[uname];
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if (existent != null) return new BadRequestObjectResult("not supported, you already casting, there's support for one live streaming only");
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var meta = new LiveCastMeta { Socket = await HttpContext.WebSockets.AcceptWebSocketAsync() };
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using (meta.Socket)
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{
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if (meta.Socket != null && meta.Socket.State == WebSocketState.Open)
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{
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Casters[uname] = meta;
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// TODO: Handle the socket here.
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// Find receivers: others in the chat room
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// send them the flow
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byte[] buffer = new byte[1024];
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WebSocketReceiveResult received = await meta.Socket.ReceiveAsync
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(new ArraySegment<byte>(buffer), CancellationToken.None);
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// FIXME do we really need to close those one in invalid state ?
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Stack<string> ToClose = new Stack<string>();
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while (received.MessageType != WebSocketMessageType.Close)
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{
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_logger.LogInformation($"Echoing {received.Count} bytes received in a {received.MessageType} message; Fin={received.EndOfMessage}");
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// Echo anything we receive
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// and send to all listner found
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foreach (var cliItem in meta.Listeners)
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{
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var listenningSocket = cliItem.Value;
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if (listenningSocket.State == WebSocketState.Open)
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await listenningSocket.SendAsync(new ArraySegment<byte>
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(buffer, 0, received.Count), received.MessageType, received.EndOfMessage, CancellationToken.None);
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else ToClose.Push(cliItem.Key);
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}
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received = await meta.Socket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
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string no;
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do
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{
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no = ToClose.Pop();
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WebSocket listenningSocket;
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if (meta.Listeners.TryRemove(no, out listenningSocket))
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await listenningSocket.CloseAsync(WebSocketCloseStatus.EndpointUnavailable, "State != WebSocketState.Open", CancellationToken.None);
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} while (no != null);
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}
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await meta.Socket.CloseAsync(received.CloseStatus.Value, received.CloseStatusDescription, CancellationToken.None);
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Casters[uname] = null;
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}
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else _logger.LogInformation($"failed (meta.Socket != null && meta.Socket.State == WebSocketState.Open)");
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}
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return Ok();
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}
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}
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}
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@ -1,111 +1,15 @@
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using System;
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using System.Collections.Concurrent;
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using System.Net.WebSockets;
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using System.Threading;
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using Microsoft.AspNet.Builder;
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using Microsoft.AspNet.Hosting;
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using Yavsc.Extensions;
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namespace Yavsc
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{
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public partial class Startup
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{
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public static ConcurrentBag<WebSocket> Listeners = new ConcurrentBag<WebSocket>();
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public void ConfigureWebSocketsApp(IApplicationBuilder app,
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SiteSettings siteSettings, IHostingEnvironment env)
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{
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app.UseWebSockets();
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app.UseSignalR("/api/signalr");
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app.UseWhen(context => context.Request.Path.StartsWithSegments("/ws"),
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branch =>
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{
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branch.Use(
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async (http, next) =>
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{
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if (http.WebSockets.IsWebSocketRequest)
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{
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WebSocket webSocket = null;
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if (!Listeners.TryPeek(out webSocket))
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{
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webSocket = await http.WebSockets.AcceptWebSocketAsync();
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Listeners.Add(webSocket);
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}
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using (webSocket)
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{
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if (webSocket != null && webSocket.State == WebSocketState.Open)
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{
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// TODO: Handle the socket here.
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// Find receivers: others in the chat room
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// send them the flow
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byte[] buffer = new byte[1024];
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WebSocketReceiveResult received = await webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
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while (received.MessageType != WebSocketMessageType.Close)
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{
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Console.WriteLine($"Echoing {received.Count} bytes received in a {received.MessageType} message; Fin={received.EndOfMessage}");
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// Echo anything we receive
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await webSocket.SendAsync(new ArraySegment<byte>(buffer, 0, received.Count), received.MessageType, received.EndOfMessage, CancellationToken.None);
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received = await webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
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}
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await webSocket.CloseAsync(received.CloseStatus.Value, received.CloseStatusDescription, CancellationToken.None);
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}
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}
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}
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else
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{
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// Nothing to do here, pass downstream.
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await next();
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}
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}
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);
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}
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);
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/*
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var _sockets = new ConcurrentBag<WebSocket>();
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app.Use(
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async (http, next) =>
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{
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if (http.WebSockets.IsWebSocketRequest)
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{
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WebSocket webSocket = null;
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if (!_sockets.TryPeek(out webSocket))
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{
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webSocket = await http.WebSockets.AcceptWebSocketAsync();
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_sockets.Add(webSocket);
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}
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using (webSocket)
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{
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if (webSocket != null && webSocket.State == WebSocketState.Open)
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{
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// TODO: Handle the socket here.
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byte[] buffer = new byte[1024];
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WebSocketReceiveResult received = await webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
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while (received.MessageType != WebSocketMessageType.Close)
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{
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Console.WriteLine($"Echoing {received.Count} bytes received in a {received.MessageType} message; Fin={received.EndOfMessage}");
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// Echo anything we receive
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await webSocket.SendAsync(new ArraySegment<byte>(buffer, 0, received.Count), received.MessageType, received.EndOfMessage, CancellationToken.None);
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received = await webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
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}
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await webSocket.CloseAsync(received.CloseStatus.Value, received.CloseStatusDescription, CancellationToken.None);
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}
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}
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}
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else
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{
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// Nothing to do here, pass downstream.
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await next();
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}
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}
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); */
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}
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}
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}
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@ -0,0 +1,16 @@
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using System.Collections.Concurrent;
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using System.Net.WebSockets;
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namespace Yavsc.ViewModels.Streaming
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{
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public class LiveCastClient {
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public string UserName { get; set; }
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public WebSocket Socket { get; set; }
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}
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public class LiveCastMeta
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{
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public WebSocket Socket { get; set; }
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public ConcurrentDictionary<string, WebSocket> Listeners { get; set; } = new ConcurrentDictionary<string, WebSocket>();
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}
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}
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