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WsServer.cs
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/
WsServer.cs
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using System;
using System.Linq;
using System.Net;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting.Server.Features;
using Microsoft.AspNetCore.Server.Kestrel.Core;
using Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Abstractions;
using Microsoft.Extensions.Options;
namespace wstream
{
public class WsServer : IDisposable
{
public bool IsListening { get; private set; }
public string[] ListeningAddresses { get; private set; }
private CancellationTokenSource _stopSource;
private KestrelServer _server;
/// <summary>
/// Starts listening for new Websocket stream connections
/// </summary>
/// <param name="endpoint">The endpoint to listen to</param>
/// <param name="connectionAdded">A connection delegate that is called when a new client is connected</param>
/// <param name="bufferSize">Buffer sized used for receiving</param>
/// <param name="defaultPage">Default response to clients like browsers</param>
/// <returns></returns>
public Task StartAsync(IPEndPoint endpoint, Func<WsStream, Task> connectionAdded, int bufferSize = Config.InternalBufferSize, string defaultPage = Config.Version)
{
if (IsListening) throw new InvalidOperationException("WsServer is already running!");
_stopSource = new CancellationTokenSource();
IsListening = true;
// setup kestrel parameters
var logger = new NullLoggerFactory();
var kestrelOptions = new KestrelServerOptions();
#if NETSTANDARD2_0
var lifetime = new ApplicationLifetime();
var socketTransportFactory = new SocketTransportFactory(Options.Create(new SocketTransportOptions()), lifetime, logger);
#else
var socketTransportFactory = new SocketTransportFactory(Options.Create(new SocketTransportOptions()), logger);
#endif
// start kestrel
_server = new KestrelServer(Options.Create(kestrelOptions), socketTransportFactory, logger);
_server.Options.Listen(endpoint);
return _server
.StartAsync(new KestrelRequestHandler(connectionAdded, bufferSize, _stopSource.Token, defaultPage),
CancellationToken.None).ContinueWith(
x =>
{
var addr = _server.Features.Get<IServerAddressesFeature>();
ListeningAddresses = addr.Addresses.ToArray();
});
}
/// <summary>
/// Shuts down the server
/// </summary>
public async Task StopAsync()
{
if (IsListening)
{
IsListening = false;
_stopSource.Cancel();
var cts = new CancellationTokenSource(500);
await _server.StopAsync(cts.Token);
_stopSource.Dispose();
_server.Dispose();
}
}
/// <summary>
/// Stops the server, and disposes any resources
/// </summary>
public void Dispose()
{
StopAsync().GetAwaiter().GetResult();
}
}
}