WebSocket框架有很多,最近在搞SocketServer服务器,服务端用的是Supersocket,客户端封装在Dll里面供第三方调用,如果dll里面引用第三方框架WebSocket的话,引用dll时还需要引用一堆额外的包,这就显得有点臃肿,因为dll里面的WebSocket只有客户端,所有考虑用原生的ClientWebSocket即可;
官方文档:https://docs.microsoft.com/zh-cn/dotnet/api/system.net.websockets.clientwebsocket?view=netframework-4.7.2&f1url=%3FappId%3DDev16IDEF1%26l%3DZH-CN%26k%3Dk(System.Net.WebSockets.ClientWebSocket);k(TargetFrameworkMoniker-.NETFramework,Version%253Dv4.7.2);k(DevLang-csharp)%26rd%3Dtrue
连接并发送消息:
public static ClientWebSocket clientWebSocket; public static Uri serverUri; public SocketClient(string ip, int port) {var webSocketUrl = $@"ws://{ip}:{port}"; clientWebSocket = new ClientWebSocket(); serverUri = new Uri(webSocketUrl); clientWebSocket.ConnectAsync(serverUri, CancellationToken.None).Wait(); } public async Task SendMessageAsync(string Msg) { if(clientWebSocket.State != WebSocketState.Open) { await clientWebSocket.ConnectAsync(serverUri, CancellationToken.None); } if (clientWebSocket.State == WebSocketState.Open) { ArraySegment<byte> bytesToSend = new ArraySegment<byte>(Encoding.UTF8.GetBytes(Msg)); await clientWebSocket.SendAsync(bytesToSend, WebSocketMessageType.Text, true, CancellationToken.None); } }
接收消息
ArraySegment<byte> bytesReceived = new ArraySegment<byte>(new byte[1024]); WebSocketReceiveResult result = await ws.ReceiveAsync(bytesReceived, CancellationToken.None); Console.WriteLine(Encoding.UTF8.GetString(bytesReceived.Array, 0, result.Count));
ClientWebSocket里面的方法都是异步的,如果同步方法调用异步:
1.不需要获取返回值的:
clientWebSocket.ConnectAsync(serverUri, CancellationToken.None).Wait();
2.需要获取返回值的
var result = clientWebSocket.ConnectAsync(serverUri, CancellationToken.None).GetAwaiter().GetResult();
因为是引用dll发送给服务器的,当主线程关闭前一刻发送信息给服务器可能接收不到最后面那条数据,原因是链接已经关闭了,发送信息失败,为确保信息能接收可以定义结束命令,在发送结束命令后程序休眠两秒,或者全局定义,每次发送信息都休眠一会。
更新:代理问题
WebSocket客户端一般都是Web的JS,在控制台搞客户端最简单的方法是引用第三方的包,像WebSocket4Net,websocket-sharp等,用第三方的包越过代理可以直接在设置里面这样操作:
而如果用原生的ClientWebSocket的话上面的越过代理方式就不行了,即使设置了也会报403的错误:
System.AggregateException:“One or more errors occurred. (The server returned status code '403' when status code '101' was expected.)”
琢磨了老半天后面无意试一下:
clientWebSocket.Options.Proxy = null;
居然就连接成功了。
差点爆粗口;
示例:
static void Main(string[] args) { ClientWebSocket clientWebSocket = new ClientWebSocket(); var webSocketUrl = $@"ws://10.88.22.62:6008"; var serverUri = new Uri(webSocketUrl); clientWebSocket.Options.Proxy = null; clientWebSocket.ConnectAsync(serverUri, CancellationToken.None).Wait(); Console.ReadKey(); }