通过查询字符串传递“Bearer”时，SignalR认证失败

我想在SignalR中启用身份验证，而服务器托管在ASP.NET WebAPI中，我正在使用OAuth Bearer autrntication，客户端是AngularJS .

在客户端，我最初通过HTTP标头传递Bearer令牌，它适用于WebAPI . 但由于SignalR JavsScript不支持在 connection 中添加HTTP头（它支持指定HTTP头），我需要使用像 self.connection.qs = { Bearer: 'xxxxxx' }; 这样的代码通过查询字符串传递Bearer令牌 .

问题出在WebAPI方面，我的SignalR总是返回401 Unauthorized .

以下是我在WebAPI方面所做的工作 .

1，我指定 OAuthBearerAuthenticationOptions.Provider 到 QueryStringEnabledOAuthBearerAuthenticationProvider ，这是我从 OAuthBearerAuthenticationProvider 继承的一个类，可以从查询字符串中检索Bearer令牌 . 代码如下 .

public class QueryStringEnabledOAuthBearerAuthenticationProvider : OAuthBearerAuthenticationProvider
    {
        private readonly string _name;

        public QueryStringEnabledOAuthBearerAuthenticationProvider()
            : this(OAuthDefaults.AuthenticationType)
        {
        }

        public QueryStringEnabledOAuthBearerAuthenticationProvider(string name)
        {
            _name = name;
        }

        public override Task RequestToken(OAuthRequestTokenContext context)
        {
            // try to read token from base class (header) if possible
            base.RequestToken(context).Wait();
            if (string.IsNullOrWhiteSpace(context.Token))
            {
                // try to read token from query string
                var token = context.Request.Query.Get(_name);
                if (!string.IsNullOrWhiteSpace(token))
                {
                    context.Token = token;
                }
            }
            return Task.FromResult(null);
        }
    }

并在WebAPI启动时将其注册如下 .

var options = new OAuthBearerAuthenticationOptions
            {
                AuthenticationMode = AuthenticationMode.Active,
                AuthenticationType = AuthenticationType,
                Provider = new QueryStringEnabledOAuthBearerAuthenticationProvider(),
                AccessTokenFormat = _accessTokenFormat,
            };
            config.SuppressDefaultHostAuthentication();
            config.Filters.Add(new HostAuthenticationFilter(OAuthDefaults.AuthenticationType));
            app.UseOAuthBearerAuthentication(options);

2，在SignalR部分，我创建了一个authorize属性，如下所示 . 没有任何改变只是用于添加断点 .

public class BearerAuthorizeAttribute : AuthorizeAttribute
    {
        public override bool AuthorizeHubConnection(HubDescriptor hubDescriptor, IRequest request)
        {
            return base.AuthorizeHubConnection(hubDescriptor, request);
        }

        public override bool AuthorizeHubMethodInvocation(IHubIncomingInvokerContext hubIncomingInvokerContext, bool appliesToMethod)
        {
            return base.AuthorizeHubMethodInvocation(hubIncomingInvokerContext, appliesToMethod);
        }
    }

并在WebAPI启动时注册它 .

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
                    {
                        // You can enable JSONP by uncommenting line below.
                        // JSONP requests are insecure but some older browsers (and some
                        // versions of IE) require JSONP to work cross domain
                        // EnableJSONP = true
                        EnableJavaScriptProxies = false
                    };
                    // Run the SignalR pipeline. We're not using MapSignalR
                    // since this branch already runs under the "/signalr"
                    // path.
                    map.RunSignalR(hubConfiguration);
                    // Require authentication for all hubs
                    var authorizer = new BearerAuthorizeAttribute();
                    var module = new AuthorizeModule(authorizer, authorizer);
                    GlobalHost.HubPipeline.AddModule(module);
                });

我发现，当SignalR连接时，我的 QueryStringEnabledOAuthBearerAuthenticationProvider.RequestToken 被调用并且它成功检索了Bearer令牌 . 但是当调用SignalR BearerAuthorizeAttribute.AuthorizeHubConnection 时，参数 request.User 仍未经过身份验证 . 所以它返回401 .

谁能给我一些关于我做错了什么的想法，谢谢 .