要搭建一个C# WebSocket 服务器,可以使用ASP.NET Core框架来实现。以下是一个简单的示例代码:
using System;
using System.Net;
using System.Net.WebSockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
public class Startup
{
public void Configure(IApplicationBuilder app)
{
app.UseWebSockets();
app.Use(async (context, next) =>
{
if (context.WebSockets.IsWebSocketRequest)
{
WebSocket webSocket = await context.WebSockets.AcceptWebSocketAsync();
await Echo(context, webSocket);
}
else
{
await next();
}
});
}
private async Task Echo(HttpContext context, WebSocket webSocket)
{
var buffer = new byte[1024];
WebSocketReceiveResult result = await webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
while (!result.CloseStatus.HasValue)
{
await webSocket.SendAsync(new ArraySegment<byte>(buffer, 0, result.Count), result.MessageType, result.EndOfMessage, CancellationToken.None);
result = await webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
}
await webSocket.CloseAsync(result.CloseStatus.Value, result.CloseStatusDescription, CancellationToken.None);
}
}
public class Program
{
public static void Main(string[] args)
{
CreateWebHostBuilder(args).Build().Run();
}
public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>();
}
在这个示例中,我们创建了一个ASP.NET Core的Startup类,配置了一个WebSocket中间件来处理WebSocket请求。在Echo方法中实现了一个简单的Echo服务器,收到客户端消息后直接将消息原样返回给客户端。
要运行这个WebSocket服务器,可以在项目文件夹下执行以下命令:
dotnet run
这将启动一个本地的WebSocket服务器,可以通过WebSocket客户端连接到它。