C# Azure应用程序服务-自定义身份验证-不允许使用HTTP谓词

我按照本教程在Xamarin.Forms应用程序中启用身份验证：

与邮递员的测试（如教程中所述）成功进行。令牌返回

当我从我的C代码中调用这个时

我犯了一个错误，比如：

Method not allowed. HTTP Verb not allowed

我发现Azure SDK在调用LoginAsync时发送POST和GET请求。所以我改变了这个

[HttpPost, Route(".auth/login/custom")]
        public IHttpActionResult Post([FromBody]CPM.Arda.Mobile.Freelancer.Backend.DataObjects.Recruitment.Custom.PromoterAuthRequest promoterAuth)

对此

[HttpPost, HttpGet, Route(".auth/login/custom")]
        public IHttpActionResult Post([FromBody]CPM.Arda.Mobile.Freelancer.Backend.DataObjects.Recruitment.Custom.PromoterAuthRequest promoterAuth)

HTTP谓词错误已消失，但出现以下错误：

 Operation=ReflectedHttpActionDescriptor.ExecuteAsync, Exception=System.NullReferenceException: Object reference not set to an instance of an object.
   at CPM.Arda.Mobile.Freelancer.Backend.Controllers.Custom.CustomAuthController.Post(PromoterAuthRequest promoterAuth)
   at lambda_method(Closure , Object , Object[] )
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Web.Http.Tracing.ITraceWriterExtensions.<TraceBeginEndAsyncCore>d__18`1.MoveNext()
2017-07-11T10:39:50  PID[9680] Error       Operation=ApiControllerActionInvoker.InvokeActionAsync, Exception=System.NullReferenceException: Object reference not set to an instance of an object.
   at CPM.Arda.Mobile.Freelancer.Backend.Controllers.Custom.CustomAuthController.Post(PromoterAuthRequest promoterAuth)
   at lambda_method(Closure , Object , Object[] )
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)

Operation=ReflectedHttpActionDescriptor.ExecuteAsync，Exception=System.NullReferenceException:对象引用未设置为对象的实例。
在CPM.Arda.Mobile.freeloper.Backend.Controllers.Custom.CustomAuthController.Post（PromoterAuthRequest promoterAuth）
在lambda_方法（闭包、对象、对象[]）
在System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.c\u DisplayClass10.b\u 9（对象实例，对象[]方法参数）
位于System.Web.Http.Controller.ReflectedHttpActionDescriptor.ActionExecutor.Execute（对象实例，对象[]参数）
位于System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync（HttpControllerContext controllerContext，IDictionary`2参数，CancellationToken CancellationToken）
---来自引发异常的上一个位置的堆栈结束跟踪---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）
在System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）中
在System.Web.Http.Tracing.itraceWriteExtensions.d_u18`1.MoveNext（）中
2017-07-11T10:39:50 PID[9680]错误操作=ApiControllerActionInvoker.InvokeActionAsync，异常=System.NullReferenceException:对象引用未设置为对象的实例。
在CPM.Arda.Mobile.freeloper.Backend.Controllers.Custom.CustomAuthController.Post（PromoterAuthRequest promoterAuth）
在lambda_方法（闭包、对象、对象[]）
在System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.c\u DisplayClass10.b\u 9（对象实例，对象[]方法参数）
位于System.Web.Http.Controller.ReflectedHttpActionDescriptor.ActionExecutor.Execute（对象实例，对象[]参数）
位于System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync（HttpControllerContext controllerContext，IDictionary`2参数，CancellationToken CancellationToken）

我真的很困惑。本主题没有现成的教程

我发现Azure SDK在调用LoginAsync时发送POST和GET请求

好的，移动应用后端将强制使用https，如果您使用http

http

发送请求，则您将获得302状态码，如下所示：

如上所述，从http->https重定向会导致http谓词获取

使用Https更改移动应用Uri当您初始化

MobileServiceClient

时，您的代码将按预期工作

---

这看起来像控制器操作中发生的NullReferenceException。

 Operation=ReflectedHttpActionDescriptor.ExecuteAsync, Exception=System.NullReferenceException: Object reference not set to an instance of an object.
   at CPM.Arda.Mobile.Freelancer.Backend.Controllers.Custom.CustomAuthController.Post(PromoterAuthRequest promoterAuth)
   at lambda_method(Closure , Object , Object[] )
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Web.Http.Tracing.ITraceWriterExtensions.<TraceBeginEndAsyncCore>d__18`1.MoveNext()
2017-07-11T10:39:50  PID[9680] Error       Operation=ApiControllerActionInvoker.InvokeActionAsync, Exception=System.NullReferenceException: Object reference not set to an instance of an object.
   at CPM.Arda.Mobile.Freelancer.Backend.Controllers.Custom.CustomAuthController.Post(PromoterAuthRequest promoterAuth)
   at lambda_method(Closure , Object , Object[] )
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)
   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)