Question

我试图建立一个coss-domain连接。在我的JavaScript客户端中，我发现连接没有问题，但是如果我从集线器发送信号，则javascript方法不会受到影响。在控制台中没有显示错误。 JavaScript变量＆＃34; chat＆＃34;被定义为。我查看了互联网上的服务器教程，我大部分都复制了代码，但它没有用。

控制台应用程序主机：

class Program
    {
        static void Main(string[] args)
        {
            string url = "http://localhost:43253/";
            using (WebApp.Start(url))
            {
                Console.WriteLine($"Server running on {url}");
                Console.ReadKey();
                MyHub hub = new MyHub();
                hub.Send("test", "test");
                Console.ReadKey();
            }
        }
    }

    class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            app.Map("/signalr", map =>
            {
                // Setup the cors middleware to run before SignalR.
                // By default this will allow all origins. You can 
                // configure the set of origins and/or http verbs by
                // providing a cors options with a different policy.
                map.UseCors(CorsOptions.AllowAll);

                var hubConfiguration = new HubConfiguration
                {

                };

                // Run the SignalR pipeline. We're not using MapSignalR
                // since this branch is already runs under the "/signalr"
                // path.
                map.RunSignalR(hubConfiguration);
            });
        }
    }

    public class MyHub : Hub
    {
        public override Task OnConnected()
        {
            Console.WriteLine("connected");
            return base.OnConnected();
        }

        public void Send(string name, string message)
        {
            var context = GlobalHost.ConnectionManager.GetHubContext<MyHub>();
            context.Clients.All.addMessage(name, message);
        }
    }

JavaScript客户端：

@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>

</head>
<body>
    <div id="image">
    </div>
    <script src="~/Scripts/jquery-1.6.4.min.js"></script>
    <script src="~/Scripts/jquery.signalR-2.2.2.min.js"></script>
    <script src="http://localhost:43253/signalr/hubs"></script>
    <script type="text/javascript">
        $(function () {
            $.connection.hub.url = "http://localhost:43253/signalr";
            var chat = $.connection.myHub;

            chat.client.addMessage = function (name, message) {
                console.log(name + message);
            }
        });
    </script>
</body>
</html>

Answer 1

我修好了。问题是我忘了开始连接。刚补充：$ .connection.hub.start（）;在JavaScript客户端的末尾

带有JavaScript客户端问题的SignalR跨域控制台应用程序主机

1 个答案: