之间的HttpContext和SignalR HubCallerContext统一静态类 [英] Unified static class between HttpContext and SignalR HubCallerContext

问题描述

我有很多code的依赖HttpContext.Current，
我注意到了来自SignalR枢纽请求有 HttpContext.Current == NULL ，
所以我的code减免，例如：

I have a lot of code that depends on HttpContext.Current, and I noticed that requests that come from SignalR hubs have HttpContext.Current == null, so my code breaks, for example:

HttpContext.Current.Request.IsAuthenticated

于是我想出了以下内容：

So I came up with following:

public static class UnifiedHttpContext
    {
        private static HubCallerContext SignalRContext { get; set; }

        private static int SignalRUserId 
        {
            get { return WebSecurity.GetUserId(SignalRContext.User.Identity.Name); }
        }

        private static bool IsSignalRRequest
        {
            get { return SignalRContext != null; }
        }

        public static void SetSignalRContext(HubCallerContext context)
        {
            SignalRContext = context;
        }

        public static bool IsAuthenticated
        {
            get
            {
                if (!IsSignalRRequest)
                {
                    return System.Web.HttpContext.Current.Request.IsAuthenticated;
                }
                else
                {
                    return SignalRContext.User.Identity.IsAuthenticated;
                }
            }
        }

        public static int UserId
        {
            get
            {
               if (!IsSignalRRequest)
               {
                   return WebSecurity.CurrentUserId;
               }
               else
               {
                   return SignalRUserId;
               }
            }
        }
    }

和在主枢纽（每隔枢纽从它继承）：

And in master hub (every other hub inherits from it):

public abstract class MainHub : Hub
{
        public override Task OnConnected()
        {
            UnifiedHttpContext.SetSignalRContext(Context);
            Groups.Add(Context.ConnectionId, UnifiedHttpContext.UserId.ToString());
            return base.OnConnected();
        }
}

• 这是正确的做法，或者是这个解决在某种程度上，我是不知道的？

  • Is this correct approach, or is this solved somehow already that I'm not aware of?

    这是危险的，因为静态类在应用程序共享的，会为所有用户设置这同样的情况下？如果是这样，我可以让每个请求？

    Is this dangerous since static classes are shared in application, would this set same context for all users? If so can I make it per request?

    推荐答案

    SignalR可以访问 HubCallerContex 而不是的HttpContext 。您可以通过使用关键字背景访问HubCallerContext对象。如果您要访问的HttpContext 则可以按照以下方法从上下文中获取它：

    SignalR gives you access to HubCallerContex instead of HttpContext. You can access HubCallerContext object by using keyword context. If you want to access HttpContext you can fetch it from the context as follows:

    System.Web.HttpContextBase httpContext = Context.Request.GetHttpContext();
    

    希望这有助于。

    这篇关于之间的HttpContext和SignalR HubCallerContext统一静态类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！