相关疑难解决方法(0)

错误：无法启动连接：错误：WebSocket 连接失败。在服务器上找不到连接，端点可能不是 SignalR 端点，服务器上不存在连接 ID，或者存在阻止 WebSocket 的代理。如果您有多个服务器，请检查粘性会话是否已启用。

WebSocketTransport.js:49 WebSocket 连接到“ws://xxxxxx/product/web-services/hubs/spreadhub”失败：

Angular.ts

 ngOnInit(): void {

      // For signalR Hub connection
      this.connection  = new HubConnectionBuilder()  
      .withUrl('http://xxx.xxx.com/production/web-services/hubs/spreadhub', {  // localhost from **AspNetCore3.1 service**
        skipNegotiation: true,
        transport: signalR.HttpTransportType.WebSockets
      })  
      .build();

        this.connection.on('dataReceived', (data: string) => {
          var model = JSON.parse(data);

      });
  
      this.connection.start().then(() => { // to start the server
             console.log('server connected!!!');
         }).catch(err => console.log(err));
  }

我有一个简单的SingulaR示例,我已经添加到传统的ASP.Net MVC应用程序中.

以下是各个部分:

OWIN启动课程

[assembly: OwinStartup(typeof (Startup))]

namespace MyApp.Web
{
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            app.MapSignalR();
        }
    }
}

SignalR Hub

using System.Collections.Generic;
using Microsoft.AspNet.SignalR;
using Microsoft.AspNet.SignalR.Hubs;

namespace MyApp.Web
{
    [HubName("podService")]
    public class PodServiceHub : Hub
    {
        public PodServiceHub()
        {
            ;
        }

        public IEnumerable<string> GetMessages()
        {
            return new[] {"blah", "blah", "blah"};
        }
    }
}

服务器端外观

using Microsoft.AspNet.SignalR;
using Microsoft.AspNet.SignalR.Hubs;

namespace MyApp.Web
{
    public class PodService
    {
        PodService(IHubConnectionContext<dynamic> clients)
        {
            Clients = clients;
        }

        public PodService()
            : …