AJAX在C#中处理WebSocket连接超时的方法
在C#中,处理WebSocket连接超时可以通过设置CancellationTokenSource
来实现。以下是一个简单的示例,展示了如何在C#中使用AJAX处理WebSocket连接超时:
首先,安装
System.Net.WebSockets
库,以便使用WebSocket类。创建一个名为
WebSocketClient
的类,用于处理WebSocket连接:
using System;
using System.Net.WebSockets;
using System.Threading;
using System.Threading.Tasks; public class WebSocketClient{ private readonly Uri _uri; private ClientWebSocket _webSocket; public WebSocketClient(string url) {
_uri = new Uri(url);
_webSocket = new ClientWebSocket();
} public async Task ConnectAsync(int timeout) { using var cts = new CancellationTokenSource(TimeSpan.FromMilliseconds(timeout)); await _webSocket.ConnectAsync(_uri, cts.Token);
} public async Task SendAsync(string message, int timeout) { using var cts = new CancellationTokenSource(TimeSpan.FromMilliseconds(timeout)); var buffer = new ArraySegment<byte>(Encoding.UTF8.GetBytes(message)); await _webSocket.SendAsync(buffer, WebSocketMessageType.Text, true, cts.Token);
} public async Task<string> ReceiveAsync(int timeout) { using var cts = new CancellationTokenSource(TimeSpan.FromMilliseconds(timeout)); var buffer = new ArraySegment<byte>(new byte[1024]); var result = await _webSocket.ReceiveAsync(buffer, cts.Token); return Encoding.UTF8.GetString(buffer.Array, 0, result.Count);
} public async Task CloseAsync() { if (_webSocket.State == WebSocketState.Open)
{ await _webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, "Closing", CancellationToken.None);
}
}
}
- 在你的主程序中,使用
WebSocketClient
类连接到WebSocket服务器,并设置超时:
using System;
using System.Threading.Tasks; class Program{ static async Task Main(string[] args) { var webSocketClient = new WebSocketClient("wss://your-websocket-server-url"); try { // 设置连接超时为5000毫秒(5秒) await webSocketClient.ConnectAsync(5000); // 发送消息并设置发送超时为3000毫秒(3秒) await webSocketClient.SendAsync("Hello, WebSocket!", 3000); // 接收消息并设置接收超时为3000毫秒(3秒) var response = await webSocketClient.ReceiveAsync(3000);
Console.WriteLine($"Received: {response}");
} catch (OperationCanceledException)
{
Console.WriteLine("WebSocket operation timed out.");
} finally { await webSocketClient.CloseAsync();
}
}
}
这个示例中,我们设置了连接、发送和接收操作的超时时间。如果操作在指定的超时时间内未完成,将抛出OperationCanceledException
异常。你可以根据需要调整超时值。
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