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在C#中,要管理WebSocket会话池,你需要创建一个类来存储和处理所有活动的WebSocket连接。以下是一个简单的示例,展示了如何使用中间件来管理WebSocket会话池:
dotnet add package Microsoft.AspNetCore.WebSockets
public class WebSocketSession
{
public string Id { get; set; }
public WebSocket WebSocket { get; set; }
}
public class WebSocketSessionManager
{
private ConcurrentDictionary<string, WebSocketSession> _sessions = new ConcurrentDictionary<string, WebSocketSession>();
public void AddSession(WebSocketSession session)
{
_sessions.TryAdd(session.Id, session);
}
public void RemoveSession(string id)
{
_sessions.TryRemove(id, out _);
}
public WebSocketSession GetSessionById(string id)
{
_sessions.TryGetValue(id, out var session);
return session;
}
public List<WebSocketSession> GetAllSessions()
{
return _sessions.Values.ToList();
}
}
public class WebSocketMiddleware
{
private readonly RequestDelegate _next;
private readonly WebSocketSessionManager _sessionManager;
public WebSocketMiddleware(RequestDelegate next, WebSocketSessionManager sessionManager)
{
_next = next;
_sessionManager = sessionManager;
}
public async Task InvokeAsync(HttpContext context)
{
if (context.WebSockets.IsWebSocketRequest)
{
var webSocket = await context.WebSockets.AcceptWebSocketAsync();
var session = new WebSocketSession
{
Id = Guid.NewGuid().ToString(),
WebSocket = webSocket
};
_sessionManager.AddSession(session);
try
{
await HandleWebSocketSession(session);
}
finally
{
_sessionManager.RemoveSession(session.Id);
}
}
else
{
await _next(context);
}
}
private async Task HandleWebSocketSession(WebSocketSession session)
{
var buffer = new byte[1024 * 4];
var result = await session.WebSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
while (!result.CloseStatus.HasValue)
{
// Process received data
// ...
// Send data to client
// ...
result = await session.WebSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
}
await session.WebSocket.CloseAsync(result.CloseStatus.Value, result.CloseStatusDescription, CancellationToken.None);
}
}
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddSingleton<WebSocketSessionManager>();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
app.UseWebSockets();
app.UseMiddleware<WebSocketMiddleware>();
// Other middlewares
// ...
}
}
现在,你已经创建了一个可以管理WebSocket会话池的中间件。你可以通过WebSocketSessionManager类的实例来访问和操作所有活动的WebSocket连接。
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