无法获得任何响应-发送HTTP标头后，服务器无法附加标头

我有一个.NET MVC项目，并且我在该项目内部使用了用于REST API的API控制器。项目中使用的身份验证基于OwinMiddleware。

以下代码在OwinMiddleware中用于身份验证

 var authValue = context.Request.Headers["Authorization"];
 if (!string.IsNullOrEmpty(authValue) && (authValue.StartsWith("Basic ")))
  {
      authValue = authValue.Substring(6).Trim();
      authValue = Encoding.UTF8.GetString(Convert.FromBase64String(authValue));
      var credentials = authValue.Split(":".ToCharArray());
      var signInStatus = await _signinManager.PasswordSignInAsync(credentials[0], credentials[1], false, false);

          switch (signInStatus)
           {
             case Microsoft.AspNet.Identity.Owin.SignInStatus.Success:
                    var user = await _userManager.FindByNameAsync(credentials[0]);
                    var identity = await _signinManager.CreateUserIdentityAsync(user);
                    context.Request.User = new ClaimsPrincipal(identity);
                     await base.Next.Invoke(context);
                     break;

             default:
                   context.Response.StatusCode = 401;
// an aobject representing error
                   var res = GetResposeData() 
                   var format = GetResponseContentType(context.Request);
                   var data = ParseToString(res , format);
                   var dataByte = Encoding.UTF8.GetBytes(data);
                  context.Response.ContentType = GetContentType(format);
                  context.Response.Body.Write(dataByte, 0, dataByte.Length);
                   break;
             }

    }

在startup.cs中，我添加了以下代码

public void ConfigureAuth(IAppBuilder app)
    {
        app.CreatePerOwinContext(() => DependencyResolver.Current.GetService<CustomSignInManager>());
        app.CreatePerOwinContext(() => DependencyResolver.Current.GetService<CustomUserManager>());
        app.UseCookieAuthentication(new CookieAuthenticationOptions()
        {
            AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
            LoginPath = new PathString("/account/index"),
            Provider = new CookieAuthenticationProvider()
            {
                OnApplyRedirect = ctx =>
                {
                    ctx.Response.Redirect(ctx.RedirectUri);
                }
            }
        });
        app.UseAutofacMiddleware(AutofacConfig.Container);
    }

当我连续使用邮递员调用API时，发现以下响应

无法得到任何回应。连接到baseUrl / api / User时发生错误？pageNumber = 1＆pageSize = 500。发生这种情况的原因：服务器无法发送响应：确保后端正常运行自签名SSL证书被阻止：通过在“设置”>“常规代理”中配置不正确的“ SSL证书验证”来解决此问题。在“设置”>“代理请求超时”中正确配置了代理：在“设置”>“常规”中更改请求超时

以下是Windows事件日志中的一些例外。

事件代码：3005事件消息：发生未处理的异常。事件时间：2/14/2019 7:04:10 PM事件时间（UTC）：2/14/2019 8:04:10 AM事件ID：22548ff89e3744adbfd5c3e2b3b66ef4事件顺序：5事件发生：1事件详细代码：0应用信息：应用程序域：/ LM / W3SVC / 1 / ROOT / XYZ-2-131946050074629312信任级别：完整应用程序虚拟路径：/ XYZ应用程序路径：C：\ inetpub \ wwwroot \ xyz \机器名称：ABC进程信息：进程ID： 15228进程名称：w3wp.exe帐户名称：IIS APPPOOL \ DefaultAppPool异常信息：异常类型：HttpException异常消息：服务器无法在发送HTTP标头后追加标头。在System.Web.HttpHeaderCollection.SetHeader（字符串名称，字符串值，布尔值替换）在Microsoft.Owin.Host.SystemWeb.CallHeaders.AspNetResponseHeaders.Set（字符串键，2 headers, String key, String[] values) at Microsoft.Owin.Infrastructure.ChunkingCookieManager.AppendResponseCookie(IOwinContext context, String key, String value, CookieOptions options) at Microsoft.Owin.Security.Cookies.CookieAuthenticationHandler.<ApplyResponseGrantAsync>d__f.MoveNext() --- 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 Microsoft.Owin.Security.Infrastructure.AuthenticationHandler.<ApplyResponseCoreAsync>d__b.MoveNext() --- 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 Microsoft.Owin.Security.Infrastructure.AuthenticationHandler.<ApplyResponseAsync>d__8.MoveNext() --- 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 Microsoft.Owin.Security.Infrastructure.AuthenticationHandler.<TeardownAsync>d__5.MoveNext() --- 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 Microsoft.Owin.Security.Infrastructure.AuthenticationMiddleware1.d__0.MoveNext（）-从上一个引发异常的位置开始的堆栈跟踪--在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（Task任务）在Microsoft.AspNet.Identity.Owin.IdentityFactoryMiddleware2.<Invoke>d__5.MoveNext() --- 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 Microsoft.AspNet.Identity.Owin.IdentityFactoryMiddleware2.d__5.MoveNext（）-从上一个引发异常的位置开始的堆栈跟踪--在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（Task任务））在Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContextStage.d__5.MoveNext（）---从上一个引发异常的位置开始的堆栈跟踪---在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务） ），位于Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.d__2.MoveNext（）的System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）-从引发异常的上一位置开始的堆栈结束跟踪-在System.Runtime.ExceptionServices.ExceptionDispatchInfo中。Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.EndFinalWork（IAsyncResult ar）处的Throw（）在System.Web.HttpApplication.ExecuteStep（System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（） IExecutionStep步骤，布尔值和已同步完成）

API控制器具有以下代码以返回响应

   // create new response
// format can be json or xml
            var response = new HttpResponseMessage()
            {
                Content = new StringContent(data, Encoding.UTF8, format),
                StatusCode = httpStatus
            };

            //if last modified available
// some date value
            if (lastUpdated != null)
                response.Content.Headers.LastModified = lastUpdated; 

            return response;