如何从Xamarin客户端连接到SignalR服务器? [英] How to connect to SignalR server, from Xamarin client?

问题描述

(**)我创建了一个托管SignalR集线器的ASP.NET Web服务器.我遵循了此教程.有用.然后，我创建了一个Xamarin.Android客户端(*).问题是我无法连接到服务器.我认为，由于主机地址中存在"localhost"，因此无法连接.例外很大.

(**) I created an ASP.NET web server, hosting SignalR hub. I followed this tutorial. It works. Then I created a Xamarin.Android client(*). The problem is I can't connected to the server. I think, I can't connected because of "localhost" in my host address. The exception is pretty big.

如果我的怀疑是正确的，我该如何解决?如何使localhost看起来像普通服务器?

If my suspicions are correct, how can I work around? How can I make localhost looks like normal server?

(*)-我也尝试过Xamarin.Forms.

(*) - I also tried with Xamarin.Forms in general.

(**)-请查看问题底部的编辑".

(**) - Please, look at the "EDIT" at the bottom of the question.

这是我的方法:

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.Main);

        // Get our button from the layout resource,
        // and attach an event to it
        Button button = FindViewById<Button>(Resource.Id.MyButton);

        button.Click += async delegate 
        {
            button.Text = string.Format("{0} clicks!", count++);
            var hubConnection = new HubConnection("http://localhost:64642");
            var chatHubProxy = hubConnection.CreateHubProxy("ChatHub");
            try
            {
                // Start the connection
                await hubConnection.Start();

                // Invoke the 'UpdateNick' method on the server
                await chatHubProxy.Invoke("Send", new object[] { "TheMessage", "JohnDoe" });
            }
            catch(Exception ex)
            {

            }
        };
    }

{System.Net.WebException:错误:ConnectFailure(连接被拒绝)---> System.Net.Sockets.SocketException:在System.Net.Sockets.Socket.Connect(System.Net.EndPoint remoteEP)上拒绝连接[0x000cb]在/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System/System.Net.Sockets/Socket.cs:1313在System.Net.WebConnection.Connect(System.Net.HttpWebRequest请求)[0x0019b]在/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System/System.Net/WebConnection.cs:195---内部异常堆栈跟踪的结尾---位于System.Net.HttpWebRequest.EndGetResponse(System.IAsyncResultasyncResult)[0x0005e]在/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System/System.Net/HttpWebRequest.cs:1023在System.Threading.Tasks.TaskFactory 1 [TResult] .FromAsyncCoreLogic(System.IAsyncResult错误，System.Func 2 [T，TResult] endFunction，System.Action 1 [T] endAction，System.Threading.Tasks.Task 1 [TResult]答应，System.Boolean requireSynchronization)[0x00014]在/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/threading/Tasks/FutureFactory.cs:550

{System.Net.WebException: Error: ConnectFailure (Connection refused) ---> System.Net.Sockets.SocketException: Connection refused at System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP) [0x000cb] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System/System.Net.Sockets/Socket.cs:1313 at System.Net.WebConnection.Connect (System.Net.HttpWebRequest request) [0x0019b] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System/System.Net/WebConnection.cs:195 --- End of inner exception stack trace --- at System.Net.HttpWebRequest.EndGetResponse (System.IAsyncResult asyncResult) [0x0005e] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System/System.Net/HttpWebRequest.cs:1023 at System.Threading.Tasks.TaskFactory1[TResult].FromAsyncCoreLogic (System.IAsyncResult iar, System.Func2[T,TResult] endFunction, System.Action1[T] endAction, System.Threading.Tasks.Task1[TResult] promise, System.Boolean requiresSynchronization) [0x00014] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/threading/Tasks/FutureFactory.cs:550

-从上一个引发异常的位置开始的堆栈结束-System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()[0x0000c]在/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess处(System.Threading.Tasks.Task任务)在[0x00047]中/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task任务)在[0x0002e]中/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156在System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd处(System.Threading.Tasks.Task任务)在[0x0000b]中/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128在System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1 + ConfiguredTaskAwaiter [TResult] .GetResult()[0x00000]在/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:535在System.Net.Http.HttpClientHandler + c__async0.MoveNext()[0x003ce]在/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System.Net.Http/System.Net.Http/HttpClientHandler.cs:379

--- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:535 at System.Net.Http.HttpClientHandler+c__async0.MoveNext () [0x003ce] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System.Net.Http/System.Net.Http/HttpClientHandler.cs:379

-从上一个引发异常的位置开始的堆栈结束-System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()[0x0000c]在/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess处(System.Threading.Tasks.Task任务)在[0x00047]中/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task任务)在[0x0002e]中/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156在System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd处(System.Threading.Tasks.Task任务)在[0x0000b]中/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128在System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1 + ConfiguredTaskAwaiter [TResult] .GetResult()[0x00000]在/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:535在System.Net.Http.HttpClient + c__async0.MoveNext()[0x000a9] in/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System.Net.Http/System.Net.Http/HttpClient.cs:276

--- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:535 at System.Net.Http.HttpClient+c__async0.MoveNext () [0x000a9] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/System.Net.Http/System.Net.Http/HttpClient.cs:276

-从上一个引发异常的位置开始的堆栈结束-System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()[0x0000c]在/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess处(System.Threading.Tasks.Task任务)在[0x00047]中/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task任务)在[0x0002e]中/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156在System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd处(System.Threading.Tasks.Task任务)在[0x0000b]中/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128在System.Runtime.CompilerServices.TaskAwaiter.GetResult()[0x00000]在/Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:113在AndroidApp.MainActivity +<> c__DisplayClass1_0 +< b__0> d.MoveNext()[0x000a5] inC:\ Data \ Projects \ SinglaRSamples \ AndroidApp \ AndroidApp \ MainActivity.cs:36}

--- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in /Users/builder/data/lanes/3511/77cb8568/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:113 at AndroidApp.MainActivity+<>c__DisplayClass1_0+<b__0>d.MoveNext () [0x000a5] in C:\Data\Projects\SinglaRSamples\AndroidApp\AndroidApp\MainActivity.cs:36 }

按照 mason 和 Jason 的建议，我可能必须使用正确的IP而不是"localhost".Android仿真器看到的实际localhost的IP.我正在努力寻找该IP，它位于Android设置中.任何帮助都会很棒！

as mason and Jason suggested, I probably have to use the proper IP instead of "localhost". The IP that Android Emulator see the actual localhost. I'm struggling to find that IP, it's somewhere in Android Settings. Any help would be great!

推荐答案

您可以使用

You can access the ASP.NET site running on your PC host using http://10.0.2.2:64642 from the Google SDK emulator. If it fails to reach the server then you probably need to configure the Windows Firewall to allow incoming HTTP/HTTPS connections.

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