WebSockets

Cross-Platform WebSockets Proxy

Minimalist websocket framework for .NET Core. You can use it on your APIs to communicate among your various client types.

Latest release on Nuget

Usage for API - Service Layer

Startup ConfigureServices

// Add NetCoreStack Native Socket Services.
services.AddNativeWebSockets<ServerWebSocketCommandInvocator>();

Startup Configure

 app.UseNativeWebSockets();

Controller with dependency injection

public MyController(IConnectionManager connectionManager)
{
    _connectionManager = connectionManager;
}

[HttpPost(nameof(SendAsync))]
public async Task<IActionResult> SendAsync([FromBody]SimpleModel model)
{
    var echo = $"Echo from server '{model.Message}' - {DateTime.Now}";
    var obj = new { message = echo };
    var webSocketContext = new WebSocketMessageContext { Command = WebSocketCommands.DataSend, Value = obj };
    await _connectionManager.BroadcastAsync(webSocketContext);
    return Ok();
}

Clients

Startup ConfigureServices

// WebSockets for Browsers
services.AddNativeWebSockets<AgentsWebSocketCommandInvocator>();

// Client WebSocket - Proxy connections
var builder = services.AddProxyWebSockets();

var connectorname = $"TestWebApp-{Environment.MachineName}";
builder.Register<CustomWebSocketCommandInvocator>(connectorname, "localhost:7803");

// Runtime context factory
builder.Register<AnotherEndpointWebSocketCommandInvocator, CustomInvocatorContextFactory>();

Startup Configure

// Client WebSocket - Proxy connections
app.UseProxyWebSockets();

// WebSockets for Browsers
app.UseNativeWebSockets();

// Use MVC
app.UseMvc();

Invocator With Dependency Injection on Clients

public class CustomWebSocketCommandInvocator : IClientWebSocketCommandInvocator
{
    private readonly IConnectionManager _connectionManager;
    public CustomWebSocketCommandInvocator(IConnectionManager connectionManager)
    {
        _connectionManager = connectionManager;
    }

    public Task InvokeAsync(WebSocketMessageContext context)
    {
        // Sending incoming data from backend to the clients (Browsers)
        _connectionManager.BroadcastAsync(context);
        return Task.CompletedTask;
    }
}

public class ClientDiscoveryController : Controller
{
    private readonly IWebSocketConnector _connector;
    public ClientDiscoveryController(IWebSocketConnector<CustomWebSocketCommandInvocator> connector)
    {
        _connector = connector;
    }

    [HttpGet]
    public async Task<IActionResult> KeepAlive()
    {
        await _connector.SendAsync(new WebSocketMessageContext
        {
            Command = WebSocketCommands.DataSend,
            Value = new { Id = 1, Name = "Hello World!", DateTime = DateTime.Now }
        });

        return Ok();
    }
}

Prerequisites

ASP.NET Core