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Firebase System.Threading.Tasks.TaskCanceledException: A task was canceled

I keep getting the error System.Threading.Tasks.TaskCanceledException: A task was canceled when trying to any user admin operation on Firebase, using C# SDK.
Here is an example of how I am doing the call to Firebase Admin:
public static async Task<bool> SaveUserInFirebaseAsync(string email, string nome, bool emailVerified, string password, Guid uid)
{
UserRecordArgs args = new UserRecordArgs()
{
Uid = uid.ToString().ToUpper(),
Email = email,
EmailVerified = emailVerified,
DisplayName = nome,
Password = password
};
try
{
UserRecord userRecord = await FirebaseAuth.DefaultInstance.CreateUserAsync(args);
}
catch (Exception ex)
{
Logging.startFileLog(ex.ToString(), null, null, null, LogType.Error);
return false;
}
return true;
}
I dont know if its a firebase error or if I am doing the async call wrong.
Edit:
Here is the full stack trace
System.Threading.Tasks.TaskCanceledException: A task was canceled.
at Google.Apis.Http.ConfigurableMessageHandler.<SendAsync>d__59.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 System.Net.Http.HttpClient.<FinishSendAsyncBuffered>d__58.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 FirebaseAdmin.Util.ErrorHandlingHttpClient`1.<SendAsync>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 FirebaseAdmin.Util.ErrorHandlingHttpClient`1.<SendAndReadAsync>d__10.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 FirebaseAdmin.Util.ErrorHandlingHttpClient`1.<SendAndDeserializeAsync>d__7`1.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 FirebaseAdmin.Auth.Users.FirebaseUserManager.<PostAndDeserializeAsync>d__29`1.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 FirebaseAdmin.Auth.Users.FirebaseUserManager.<GetUserAsync>d__28.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 FirebaseAdmin.Auth.Users.FirebaseUserManager.<GetUserByEmailAsync>d__15.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 FirebaseAdmin.Auth.AbstractFirebaseAuth.<GetUserByEmailAsync>d__28.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 FirebaseAdmin.Auth.AbstractFirebaseAuth.<GetUserByEmailAsync>d__27.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 TeltonikaSiteWebApplication.WebApplicationHelpers.FireBaseHelper.<SaveUserInFirebaseAsync>d__5.MoveNext()

how to send images which are in local folder in microsoft botframework sdk v4 using c#

I created a bot with Microsoft Botframework C# SDK V4 and it is working well. Now I want to add some images to that bot. I am using cards but cards are taking only url of an image. I want to send the images which are in my local folder. How can I make it work??
I already tried this with 15.handling attachments github repo(https://github.com/Microsoft/BotBuilder-Samples/tree/master/samples/csharp_dotnetcore/15.handling-attachments). And while I am using the exact code in handling attachments github repo, I am getting the below exception stacktrace for inline attachments.
Sorry, it looks like something went wrong.’ at Microsoft.Bot.Connector.Conversations.d__10.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Bot.Connector.ConversationsExtensions.d__17.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Bot.Builder.BotFrameworkAdapter.d__15.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Bot.Builder.TurnContext.<>c__DisplayClass22_0.
<g__SendActivitiesThroughAdapter|1>d.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Bot.Builder.TurnContext.d__21.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.BotBuilderSamples.AttachmentsBot.d__0.MoveNext() in
C:\botbuilder-samples\samples\csharp_dotnetcore\15.handling-attachments\AttachmentsBot.cs:line 65
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Bot.Builder.MiddlewareSet.d__3.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Bot.Builder.BotAdapter.d__13.MoveNext()’
How can I resolve this issue??

The 15.handling-attachments sample demonstrates how to read a local file, and attach it as a base64 encoded image:
reply.Attachments = new List<Attachment>() { GetInlineAttachment() };
private static Attachment GetInlineAttachment()
{
var imagePath = Path.Combine(Environment.CurrentDirectory, #"Resources\architecture-resize.png");
var imageData = Convert.ToBase64String(File.ReadAllBytes(imagePath));
return new Attachment
{
Name = #"Resources\architecture-resize.png",
ContentType = "image/png",
ContentUrl = $"data:image/png;base64,{imageData}",
};
}
Another option is to use the ConnectorClient's UploadAttachmentAsync api:
private async Task SendFile(ITurnContext turnContext)
{
var webRoot = _env.ContentRootPath;
var imagePath = System.IO.Path.Combine(webRoot, "Resources", "BotFrameworkDiagram.png");
var connector = turnContext.TurnState.GetValueOrDefault("Microsoft.Bot.Connector.IConnectorClient") as ConnectorClient;
var attachments = new Attachments(connector);
var response = await attachments.Client.Conversations.UploadAttachmentAsync(
turnContext.Activity.Conversation.Id,
new AttachmentData
{
Name = "BotFrameworkDiagram.png",
OriginalBase64 = File.ReadAllBytes(imagePath),
Type = "image/png"
});
var attachmentUri = attachments.GetAttachmentUri(response.Id);
var attachment = new Attachment
{
Name = "BotFrameworkDiagram.png",
ContentType = "image/png",
ContentUrl = attachmentUri
};
var reply = turnContext.Activity.CreateReply();
reply.Attachments.Add(attachment);
await turnContext.SendActivityAsync(reply);
}

VirtualFileResult file not found when file exists

Maybe I'm not understanding what a VirtualFileResult is, but I'm not sure why it's throwing a FileNotFoundException when the file exists. Here's the code:
if (System.IO.File.Exists(fileName))
{
FileInfo info = new FileInfo(fileName);
return File(fileName, FileUtility.GetContentType(fileName), info.Name);
}
(Edit: FileUtility.GetContentType (correctly) returns the Mime type of the file, which in my case is "application/pdf".)
Here's the exception I get: (I removed the file path)
System.IO.FileNotFoundException: Could not find file: [file path removed]
File name: '[file path removed]'
at Microsoft.AspNet.Mvc.VirtualFileResult.<WriteFileAsync>d__11.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.<InvokeResultAsync>d__56.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.<InvokeResultFilterAsync>d__55.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.<InvokeAllResultFiltersAsync>d__54.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.<InvokeResourceFilterAsync>d__49.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.<InvokeAsync>d__44.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Mvc.Infrastructure.MvcRouteHandler.<RouteAsync>d__6.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Routing.Template.TemplateRoute.<RouteAsync>d__27.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Routing.RouteCollection.<RouteAsync>d__9.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Builder.RouterMiddleware.<Invoke>d__4.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.IISPlatformHandler.IISPlatformHandlerMiddleware.<Invoke>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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Diagnostics.StatusCodePagesMiddleware.<Invoke>d__3.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Diagnostics.DeveloperExceptionPageMiddleware.<Invoke>d__7.MoveNext()
It's seemingly bugging out even though an explicit check was done for whether the file exists or not. I can also manually confirm the file exists.
Maybe I'm not understanding what a VirtualFileResult is (File method returns this). On the documentation here it doesn't really describe what it is.
I'm using ASP.NET 5 RC1.

The method you're looking for is PhysicalFile():
return PhysicalFile(fileName, FileUtility.GetContentType(fileName), info.Name);
Beware, don't use a caller-supplied path with this.

The VirtualFileResult class needs the virtual path to the file in its constructor.
This means you need to provide the path relative to the wwwroot folder because it use HostingEnvironment's WebRootFileProvider.
private IFileProvider GetFileProvider(IServiceProvider requestServices)
{
if (FileProvider != null)
{
return FileProvider;
}
var hostingEnvironment = requestServices.GetService<IHostingEnvironment>();
FileProvider = hostingEnvironment.WebRootFileProvider;
return FileProvider;
}
}
Check the code on github

No luck with File("index.html") or File("~/index.html"), Virtualfileresult throws NotFound.
My solution was to use Microsoft.AspNetCore.Mvc.ControllerBase
method File(Stream fileStream...) :
public virtual FileStreamResult File(Stream fileStream,
string contentType, string fileDownloadName);
Index controller sample:
using System.IO;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
public class IndexController : Controller
{
ILoggerFactory Logger;
public IndexController(ILoggerFactory loggerFactory)
{
Logger = loggerFactory;
}
static string sep = Path.DirectorySeparatorChar.ToString();
[HttpGet("/index")]
[HttpGet("/")]
public IActionResult Index()
{
var log = Logger.CreateLogger("trace");
var path = $"{Startup.RootPath}{sep}index.html";
log.LogWarning(path);
Stream fileStream = new System.IO.FileStream(path, FileMode.Open);
return File(fileStream, "text/html");
}
}
// AspnetCore version 1.1.1 :
// <TargetFramework>netcoreapp1.1</TargetFramework>
// <PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="1.1.1" />

Your VirtualFileResult must be a relative path from the application's wwwroot.
return File("~/foo.js","text/javascript")
is going to point to wwwroot/foo.js

AspNet.Identity throws InvalidOperationException when used with SimpleInjector

I have a simple ASP.NET vNext project, with ASP Identity and SimpleInjector configured (according to http://simpleinjector.readthedocs.org/en/latest/aspnetintegration.html).
Registration works fine, however when I try to log in I get an error:
InvalidOperationException: No authentication handler is configured to handle the scheme: Microsoft.AspNet.Identity.Application
If I comment out the lines for SimpleInjector everything works just fine, which seems kind of weird. Google didn't help me either :/
This is my Startup class.
public class Startup
{
//SimpleInjector IOC container
private readonly Container _container = new Container();
private IConfigurationRoot Configuration { get; }
public Startup(IHostingEnvironment env)
{
var builder = new ConfigurationBuilder()
.AddJsonFile("appsettings.json")
.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true);
builder.AddEnvironmentVariables();
Configuration = builder.Build();
}
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddEntityFramework()
.AddSqlServer()
.AddDbContext<MyIdentityDbContext>(options => options.UseSqlServer(Configuration["Data:DefaultConnection:ConnectionString"]));
services.AddIdentity<User, IdentityRole>(options =>
{
//TODO
options.Password.RequireDigit = false;
options.Password.RequiredLength = 1;
options.Password.RequireLowercase = false;
options.Password.RequireNonLetterOrDigit = false;
options.Password.RequireUppercase = false;
}).AddEntityFrameworkStores<MyIdentityDbContext>().AddDefaultTokenProviders();
services.AddMvc();
services.AddInstance<IControllerActivator>(new SimpleInjectorControllerActivator(_container));
services.AddInstance<IViewComponentInvokerFactory>(new SimpleInjectorViewComponentInvokerFactory(_container));
//
// Work around for a Identity Framework bug inside the SignInManager<T> class.
services.Add(ServiceDescriptor.Instance<IHttpContextAccessor>(new NeverNullHttpContextAccessor()));
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
ConfigureSimpleInjector(app);
loggerFactory.AddConsole(Configuration.GetSection("Logging"));
loggerFactory.AddDebug();
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
app.UseDatabaseErrorPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
}
app.UseIISPlatformHandler(options => options.AuthenticationDescriptions.Clear());
app.UseStaticFiles();
app.UseIdentity();
app.UseMvcWithDefaultRoute();
}
private void ConfigureSimpleInjector(IApplicationBuilder app)
{
_container.Options.DefaultScopedLifestyle = new AspNetRequestLifestyle();
app.UseSimpleInjectorAspNetRequestScoping(_container);
//register all of the services
RegisterServices(app);
_container.RegisterAspNetControllers(app);
_container.RegisterAspNetViewComponents(app);
_container.Verify();
}
/// <summary>
/// Register all of the required services for IoC
/// </summary>
/// <param name="app"></param>
private void RegisterServices(IApplicationBuilder app)
{
//DB
RegisterDbServices(app);
//IDENTITY
_container.CrossWire<UserManager<User>>(app);
_container.CrossWire<SignInManager<User>>(app);
//register services
_container.CrossWire<ILoggerFactory>(app);
}
private void RegisterDbServices(IApplicationBuilder app)
{
_container.RegisterSingleton<IDocumentStore>(() =>
{
var store = new DocumentStore
{
Url = Configuration["Data:RavenDB:URL"]
};
store.Initialize();
return store;
});
_container.Register(() =>
{
var session = _container.GetInstance<IDocumentStore>().OpenAsyncSession();
session.Advanced.UseOptimisticConcurrency = true;
return session;
}, Lifestyle.Scoped);
}
// Entry point for the application.
public static void Main(string[] args) => WebApplication.Run<Startup>(args);
/// <summary>
/// Workaround for Identity bug: http://simpleinjector.readthedocs.org/en/latest/aspnetintegration.html
/// </summary>
private sealed class NeverNullHttpContextAccessor : IHttpContextAccessor
{
private readonly AsyncLocal<HttpContext> _context = new AsyncLocal<HttpContext>();
public HttpContext HttpContext
{
get { return _context.Value ?? new DefaultHttpContext(); }
set { _context.Value = value; }
}
}
}
The stacktrace:
System.InvalidOperationException: No authentication handler is configured to handle the scheme: Microsoft.AspNet.Identity.Application
at Microsoft.AspNet.Http.Authentication.Internal.DefaultAuthenticationManager.d__13.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Identity.SignInManager`1.d__27.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Identity.SignInManager`1.d__43.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 System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at Microsoft.AspNet.Identity.SignInManager`1.d__30.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 System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at Microsoft.AspNet.Identity.SignInManager`1.d__31.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 System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at Movies.Web.Controllers.AccountController.d__6.MoveNext() in C:\Users\mojol\Documents\C#\Web\Movies\src\Movies.Web\Controllers\AccountController.cs:line 68
--- 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.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at Microsoft.AspNet.Mvc.Controllers.ControllerActionExecutor.d__8`1.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 System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at Microsoft.AspNet.Mvc.Controllers.ControllerActionInvoker.d__6.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 System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.d__53.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNet.Mvc.Controllers.FilterActionInvoker.d__44.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Mvc.Infrastructure.MvcRouteHandler.d__6.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Routing.Template.TemplateRoute.d__27.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Routing.RouteCollection.d__9.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Builder.RouterMiddleware.d__4.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Authentication.AuthenticationMiddleware`1.d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNet.Authentication.AuthenticationMiddleware`1.d__18.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Authentication.AuthenticationMiddleware`1.d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNet.Authentication.AuthenticationMiddleware`1.d__18.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Authentication.AuthenticationMiddleware`1.d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNet.Authentication.AuthenticationMiddleware`1.d__18.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Authentication.AuthenticationMiddleware`1.d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNet.Authentication.AuthenticationMiddleware`1.d__18.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.IISPlatformHandler.IISPlatformHandlerMiddleware.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Diagnostics.Entity.MigrationsEndPointMiddleware.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Diagnostics.Entity.DatabaseErrorPageMiddleware.d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNet.Diagnostics.Entity.DatabaseErrorPageMiddleware.d__6.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 System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at Microsoft.AspNet.Diagnostics.DeveloperExceptionPageMiddleware.d__7.MoveNext()

Server cannot append header after HTTP headers have been sent uploading files

I get this exception intermittently in my asp.net mvc 5 c# web application:
Server cannot append header after HTTP headers have been sent.
It just happens uploading images to S3 method (Web Api Controller).
The presendrequestheaders in Global.asax
protected void Application_PreSendRequestHeaders(object sender, EventArgs e)
{
HttpApplication app = sender as HttpApplication;
if (app != null &&
app.Context != null)
{
app.Context.Response.Headers.Remove("Server");
}
}
The method that trigger the error:
[HttpPost]
[Route("UploadImageJSON")]
public IHttpActionResult UploadImageJSON(HttpRequestMessage request)
{
var httpRequest = HttpContext.Current.Request;
// Check if files are available
if (httpRequest.Files.Count != 1) return BadRequest();
var postedFile = httpRequest.Files[0];
var contentType = postedFile.ContentType;
if (!contentType.Contains("image"))
{
return StatusCode(HttpStatusCode.NotAcceptable);
}
var keyUploadFiles = Constants.UrlS3Amazon +
S3.UploadToS3WithStream(postedFile.InputStream, contentType);
return Json(JsonConvert.SerializeObject(keyUploadFiles));
}
EDIT: More information... I have my Web App hosted in Elastic BeanStalk with a load balancer, the load balancer has installed a SSL Certificate, and the connection between the load balancer and the EC2 instances are in ports 80. Maybe it could be helpful.
The Elmah log:
System.Web.HttpException (0x80004005): Server cannot append header after HTTP headers have been sent.
at System.Web.HttpHeaderCollection.SetHeader(String name, String value, Boolean replace)
at Microsoft.Owin.Host.SystemWeb.CallHeaders.AspNetResponseHeaders.Set(String key, String[] values)
at Microsoft.Owin.Infrastructure.OwinHelpers.AppendHeaderUnmodified(IDictionary2 headers, String key, String[] values)
at Microsoft.Owin.ResponseCookieCollection.Append(String key, String value, CookieOptions options)
at Microsoft.Owin.Security.Cookies.CookieAuthenticationHandler.<ApplyResponseGrantAsync>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.<ApplyResponseCoreAsync>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()
--- 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.<Invoke>d__0.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__0.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.IdentityFactoryMiddleware`2.d__0.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.Mapping.MapMiddleware.d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.EndFinalWork(IAsyncResult ar)
at System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Thanks!!

have you tried with removing app.Context.Response.Headers.Remove("Server"); i think there is this is the issue?