我在ASP.NET 4.5 Web窗体应用程序中使用SignalR。该应用程序位于http://www.smarterasp.net/上的IIS 8.0中，它支持ASP.NET 4.5 Web套接字。
SignalR在协商后尝试连接到Web套接字端点：
SignalR: Connecting to websocket endpoint 'ws://XXXXXXXX.smarterasp.net/signalr/connect?transport=webSockets&connectionToken=ixkMLqEJ4QZBQKxY_Gzbn3J82nrTTA9wy2WhcEDm1mRN8x8i1pY1Z-imcFQ0wy5Yi0KnaFcl0z8BmnXn1K5aPwiaXsSghfzAXOv5pHJD53mT9O_0mVi1YSzNWC2jNFNI0&connectionData=%5B%7B%22name%22%3A%22xxxxxxxxhub%22%7D%5D&tid=9'
但它失败了。浏览器（Chrome 29）显示在控制台上：
WebSocket connection to 'ws://XXXXXXXX.smarterasp.net/signalr/connect?transport=webSockets&connectionToken=ixkMLqEJ4QZBQKxY_Gzbn3J82nrTTA9wy2WhcEDm1mRN8x8i1pY1Z-imcFQ0wy5Yi0KnaFcl0z8BmnXn1K5aPwiaXsSghfzAXOv5pHJD53mT9O_0mVi1YSzNWC2jNFNI0&connectionData=%5B%7B%22name%22%3A%22xxxxxxxxhub%22%7D%5D&tid=9' failed: Unexpected response code: 500
我通过搜索服务器事件日志调查了这个500错误，我发现了这个异常：
Exception type: InvalidOperationException
Exception message: Not a valid web socket request.
at Microsoft.AspNet.SignalR.Owin.ServerRequest.AcceptWebSocketRequest(Func`2 callback)
at Microsoft.AspNet.SignalR.Transports.WebSocketTransport.ProcessRequest(ITransportConnection connection)
at Microsoft.AspNet.SignalR.PersistentConnection.ProcessRequest(HostContext context)
at Microsoft.AspNet.SignalR.Hubs.HubDispatcher.ProcessRequest(HostContext context)
at Microsoft.AspNet.SignalR.Owin.CallHandler.Invoke(IDictionary`2 environment)
at Microsoft.AspNet.SignalR.Owin.Handlers.HubDispatcherHandler.Invoke(IDictionary`2 environment)
at Microsoft.Owin.Host.SystemWeb.OwinCallContext.Execute()
at Microsoft.Owin.Host.SystemWeb.OwinHttpHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object extraData)
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.Owin.Host.SystemWeb.CallContextAsyncResult.End(IAsyncResult result)
at Microsoft.Owin.Host.SystemWeb.OwinHttpHandler.EndProcessRequest(IAsyncResult result)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
SignalR正确地成功回退到ServerSentEvents trasnport，但如果客户端和服务器都支持它们，我想使用Web套接字。
这些是Chrome开发栏中请求的标题页标题：
Request URL:ws://XXXXXXXX.smarterasp.net/signalr/connect?transport=webSockets&connectionToken=ixkMLqEJ4QZBQKxY_Gzbn3J82nrTTA9wy2WhcEDm1mRN8x8i1pY1Z-imcFQ0wy5Yi0KnaFcl0z8BmnXn1K5aPwiaXsSghfzAXOv5pHJD53mT9O_0mVi1YSzNWC2jNFNI0&connectionData=%5B%7B%22name%22%3A%22xxxxxxxxhub%22%7D%5D&tid=9
Request Header
Cache-Control:no-cache
Connection:Upgrade
Cookie:ASPSESSIONIDSARSTSCR=KGFDPPHBMLAOPCJOIJMJCGHA; __utma=175391648.1719372995.1378025058.1380629683.1380719917.14; __utmc=175391648; __utmz=175391648.1380629683.13.3.utmcsr=member.smarterasp.net|utmccn=(referral)|utmcmd=referral|utmcct=/account/loginform; ksucookie=EAAAAHjizGN3Q+766OL12jm34an9xl7a7bDSRrzNaVMW17OF
Host:XXXXXXXX.smarterasp.net
Origin:http://XXXXXXXX.smarterasp.net
Pragma:no-cache
Sec-WebSocket-Extensions:x-webkit-deflate-frame
Sec-WebSocket-Key:dgGEfrCFCUmN9CFG2QzvbA==
Sec-WebSocket-Version:13
Upgrade:websocket
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.76 Safari/537.36
Query String Parameters
transport:webSockets
connectionToken:ixkMLqEJ4QZBQKxY_Gzbn3J82nrTTA9wy2WhcEDm1mRN8x8i1pY1Z-imcFQ0wy5Yi0KnaFcl0z8BmnXn1K5aPwiaXsSghfzAXOv5pHJD53mT9O_0mVi1YSzNWC2jNFNI0
connectionData:[{"name":"xxxxxxxxhub"}]
tid:9
和这个web.config：
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<system.web>
<compilation debug="true">
<assemblies>
<add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
</assemblies>
</compilation>
<customErrors mode="Off" />
<httpRuntime targetFramework="4.5" />
</system.web>
<system.webServer>
<validation validateIntegratedModeConfiguration="false"></validation>
<handlers>
<remove name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" />
<remove name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" />
<remove name="ExtensionlessUrlHandler-Integrated-4.0" />
<add name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness32" responseBufferLimit="0" />
<add name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness64" responseBufferLimit="0" />
<add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
<add name="ApiURIs-ISAPI-Integrated-4.0" path="people/*" verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
</handlers>
</system.webServer>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
</entityFramework>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="EntityFramework" publicKeyToken="b77a5c561934e089" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
<connectionStrings>
...
</connectionStrings>
<appSettings>
...
</appSettings>
</configuration>`
我在SignalR Web Sockets IIS8 Server 2012 - "Not a web socket request"找到了stackoverflow的答案，所以我去http://www.websocket.org/echo.html测试一个Web套接字连接：只有连接“wss：//”（使用安全的WebSocket（TLS））工作，而不是正常的“ws：//”连接不起作用。
有什么建议吗？