C# 使用Owin的Twitter外部登录提供HTTP 403（禁止）

ASP.NETMVC5项目
Owin版本4.0.0.0

Startup.Auth

app.UseTwitterAuthentication(
  consumerKey: "somekey",
  consumerSecret: "someSecretKey");

异常发生在

ExternalLogin

方法中

响应状态代码不表示成功：403（禁止）

以下是回调URL

FYI:该网站是真实的，并且运行正常，Twitter登录在几周前还可以正常工作，但现在，突然之间，由于之前的错误而开始失败

StackTrace

[HttpRequestException: Response status code does not indicate success: 403 (Forbidden).]
   System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode() +121834
   Microsoft.Owin.Security.Twitter.<ObtainRequestTokenAsync>d__23.MoveNext() +2387
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Security.Twitter.<ApplyResponseChallengeAsync>d__12.MoveNext() +1091
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Security.Infrastructure.<ApplyResponseCoreAsync>d__b.MoveNext() +376
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Security.Infrastructure.<ApplyResponseAsync>d__8.MoveNext() +475
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Security.Infrastructure.<TeardownAsync>d__5.MoveNext() +215
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Security.Infrastructure.<Invoke>d__0.MoveNext() +968
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Security.Infrastructure.<Invoke>d__0.MoveNext() +768
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.<RunApp>d__5.MoveNext() +197
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Security.Infrastructure.<Invoke>d__0.MoveNext() +768
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Security.Infrastructure.<Invoke>d__0.MoveNext() +768
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Security.Infrastructure.<Invoke>d__0.MoveNext() +768
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Security.Infrastructure.<Invoke>d__0.MoveNext() +768
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Security.Infrastructure.<Invoke>d__0.MoveNext() +768
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Security.Infrastructure.<Invoke>d__0.MoveNext() +768
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Security.Infrastructure.<Invoke>d__0.MoveNext() +768
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.AspNet.Identity.Owin.<Invoke>d__0.MoveNext() +448
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.AspNet.Identity.Owin.<Invoke>d__0.MoveNext() +448
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.AspNet.Identity.Owin.<Invoke>d__0.MoveNext() +448
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.<RunApp>d__5.MoveNext() +197
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +60
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.<DoFinalWork>d__2.MoveNext() +184
   System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
   Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.StageAsyncResult.End(IAsyncResult ar) +117
   System.Web.<>c__DisplayClass11_0.<InvokeEndHandler>b__0() +41
   System.Web.AsyncEventExecutionStep.InvokeEndHandler(IAsyncResult ar) +151
   System.Web.AsyncEventExecutionStep.OnAsyncEventCompletion(IAsyncResult ar) +156

[HttpRequestException:响应状态代码不表示成功：403（禁止）。]
System.Net.Http.HttpResponseMessage.EnsureAccessStatusCode（）+121834
Microsoft.Owin.Security.Twitter.d_u23.MoveNext（）+2387
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Security.Twitter.d_u12.MoveNext（）+1091
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Security.Infrastructure.d_ub.MoveNext（）+376
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Security.Infrastructure.d_u8.MoveNext（）+475
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Security.Infrastructure.d_u5.MoveNext（）+215
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Security.Infrastructure.d_u0.MoveNext（）+968
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Security.Infrastructure.d_u0.MoveNext（）+768
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.d_u5.MoveNext（）+197
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Security.Infrastructure.d_u0.MoveNext（）+768
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Security.Infrastructure.d_u0.MoveNext（）+768
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Security.Infrastructure.d_u0.MoveNext（）+768
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Security.Infrastructure.d_u0.MoveNext（）+768
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Security.Infrastructure.d_u0.MoveNext（）+768
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Security.Infrastructure.d_u0.MoveNext（）+768
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Security.Infrastructure.d_u0.MoveNext（）+768
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.AspNet.Identity.Owin.d_u0.MoveNext（）+448
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.AspNet.Identity.Owin.d_u0.MoveNext（）+448
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.AspNet.Identity.Owin.d_u0.MoveNext（）+448
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.d_u5.MoveNext（）+197
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务）+60
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.d_u2.MoveNext（）+184
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）+31
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.StageAsyncResult.End（IAsyncResult ar）+117
System.Web.c_uuudisplayClass11_0.b_uuu0（）+41
System.Web.AsyncEventExecutionStep.InvokeEndHandler（IAsyncResult ar）+151
System.Web.AsyncEventExecutionStep.OnAsyncEventCompletion（IAsyncResult ar）+156

在过去一两周内，我们遇到了类似的问题，发现Twitter虽然之前没有验证回调URL，但已经开始检查它

Twitter的登录流如下所示：

客户端调用您的后端

后端使用回调URL、键等调用Twitter API

Twitter发布一个登录URL