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ITfoxtec.Identity.Saml2 Invalid URI Issue

When i use <TargetFramework>net462</TargetFramework> for my Okta SAML implementation this throw a Invalid URL when it this new Saml2AuthnRequest(config); but on my first try using this code on netcoreapp3.1` this worked perfectly fine. Please let me know if i miss something thank you.
[HttpGet, AllowAnonymous]
public IActionResult Index(string returnUrl = null)
{
try
{
var config = GetSAMLConfig();
var binding = new Saml2RedirectBinding();
binding.SetRelayStateQuery(new Dictionary<string, string> { { relayStateReturnUrl, returnUrl ?? Url.Content("~/") } });
var request = new Saml2AuthnRequest(config);
return binding.Bind(request).ToActionResult();
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
}
private Saml2Configuration GetSAMLConfig()
{
var config = new Saml2Configuration();
config.AllowedAudienceUris.Add("Okta_SAML_Example");
config.CertificateValidationMode = X509CertificateValidationMode.ChainTrust;
config.RevocationMode = X509RevocationMode.NoCheck;
var entityDescriptor = new EntityDescriptor();
entityDescriptor.ReadIdPSsoDescriptorFromUrl(new Uri("https://---------.okta.com/app/exk2b0b7dibno7rOB5d6/sso/saml/metadata"));
if (entityDescriptor.IdPSsoDescriptor != null)
{
config.SingleSignOnDestination = entityDescriptor.IdPSsoDescriptor.SingleSignOnServices.First().Location;
config.SignatureValidationCertificates.AddRange(entityDescriptor.IdPSsoDescriptor.SigningCertificates);
}
else
{
throw new Exception("IdPSsoDescriptor not loaded from metadata.");
}
return config;
}
Actual exception
System.UriFormatException: Invalid URI: The format of the URI could not be determined.
at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
at ITfoxtec.Identity.Saml2.Configuration.Saml2IdentityConfiguration.GetAudienceRestriction(Boolean audienceRestricted, IEnumerable`1 allowedAudienceUris)
at ITfoxtec.Identity.Saml2.Configuration.Saml2IdentityConfiguration.GetIdentityConfiguration(Saml2Configuration config)
at ITfoxtec.Identity.Saml2.Saml2Request..ctor(Saml2Configuration config)
at ITfoxtec.Identity.Saml2.Saml2AuthnRequest..ctor(Saml2Configuration config)
at SAMLNet461.Controllers.HomeController.Index(String returnUrl) in D:\REPO\PELICAN\LOCAL\SAML.RND - CompanyAcccounts adjustment\SAML.Demo\SAMLNet461\Controllers\HomeController.cs:line 69
at lambda_method(Closure , Object , Object[] )
at Microsoft.AspNetCore.Mvc.Internal.ActionMethodExecutor.SyncActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeActionMethodAsync>d__12.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeNextActionFilterAsync>d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Rethrow(ActionExecutedContext context)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeInnerFilterAsync>d__13.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeNextResourceFilter>d__23.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResourceExecutedContext context)
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeFilterPipelineAsync>d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.<InvokeAsync>d__16.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Builder.RouterMiddleware.<Invoke>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware.<Invoke>d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.<Invoke>d__7.MoveNext()

The code looks correct.
Maybe it is a TLS version issue.
An alternative solution is to download the metadata in your code and add the metadata string to the ITfoxtec Identity SAML 2.0 library:
var idPMetadataXml = "... downloaded metadata ...";
var entityDescriptor = new EntityDescriptor();
entityDescriptorReadIdPSsoDescriptor(idPMetadataXml);
...
Updated:
The error seams to be in relation to Audience Restriction:
config.AllowedAudienceUris.Add("Okta_SAML_Example");
The audience have to be a URI in a .NET Framework application. Plain text strings are only supported in .NET Core and .NET 5.0.
.NET Framework sample: https://github.com/ITfoxtec/ITfoxtec.Identity.Saml2/tree/master/test/TestWebApp

I had the same issue and it was caused by "GetAudienceRestriction() method". Changing issuer name from "application-name" to "https://application-name" helped. Don't forget to change your name on your Identity Provider side (Okta, Ping Identity etc.) consistently. Now exception is not thrown anymore.

What is Local value serialization error in kafka?

I recently went through Confluent Kafka library in C# .net 4.7.2 framework version. But, many times I faced Local Value serialization error. Is this error is a generic one? or this error tells anything specifically? I'm not sure when will this error raises?
var rs = (RecordSchema)RecordSchema.Parse(#"{
""namespace"": ""Confluent.Kafka.Examples.AvroSpecific"",
""type"": ""record"",
""name"": ""ProduceConsumeUser2"",
""fields"": [
{""name"": ""name"", ""type"": ""string""},
{""name"": ""favorite_number"", ""type"": [""int"", ""null""]},
{""name"": ""favorite_color"", ""type"": [""string"", ""null""]}
]}");
using (var schemaRegistry = new CachedSchemaRegistryClient(schemaRegistryConfig)){
using (var genericProducer = new ProducerBuilder<string, GenericRecord>(producerConfig)
.SetValueSerializer(new AvroSerializer<GenericRecord>(schemaRegistry).AsSyncOverAsync())
.Build())
{
var genericRecord = new GenericRecord(rs);
genericRecord.Add("name", "my name 2");
genericRecord.Add("favorite_number", 44);
genericRecord.Add("favorite_color", null);
var message = new Message<string, GenericRecord>
{
Key = contentEventName,
Value = genericRecord
};
Task.Run(() => genericProducer.ProduceAsync(contentEventName, message)).ConfigureAwait(false).GetAwaiter().GetResult();
}}
Error we get:
"Error":{
"Code":-161,
"IsFatal":false,
"Reason":"Local: Value serialization error",
"IsError":true,
"IsLocalError":true,
"IsBrokerError":false
},
"Message":"Local: Value serialization error",
"Data":{ },
"InnerException":{
"ClassName":"System.Threading.Tasks.TaskCanceledException",
"Message":"A task was canceled.",
"Data":null,
"InnerException":null,
"HelpURL":null,
"StackTraceString":" at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at Confluent.SchemaRegistry.RestService.<ExecuteOnOneInstanceAsync>d__9.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at Confluent.SchemaRegistry.RestService.<RequestAsync>d__10`1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at Confluent.SchemaRegistry.RestService.<RegisterSchemaAsync>d__18.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at Confluent.SchemaRegistry.CachedSchemaRegistryClient.<RegisterSchemaAsync>d__21.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at Confluent.SchemaRegistry.Serdes.GenericSerializerImpl.<Serialize>d__8.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at Confluent.SchemaRegistry.Serdes.AvroSerializer`1.<SerializeAsync>d__6.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)\r\n at Confluent.Kafka.Producer`2.<ProduceAsync>d__52.MoveNext()",
"RemoteStackTraceString":null,
"RemoteStackIndex":0,
"ExceptionMethod":"8\nThrowForNonSuccess\nmscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\nSystem.Runtime.CompilerServices.TaskAwaiter\nVoid ThrowForNonSuccess(System.Threading.Tasks.Task)",
"HResult":-2146233029,
"Source":"mscorlib",
"WatsonBuckets":null
},
"StackTrace":" at Confluent.Kafka.Producer`2.<ProduceAsync>d__52.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()\r\n at LogEvent(String contentEventName, IDictionary`2 e, RecordSchemaName re)",
"HelpLink":null,
"Source":"Confluent.Kafka",
"HResult":-2146233088

I cannot be for certain. But I got to this page because I had the same exception details /issue...
For me, solving the issue was making sure I had the correct credentials for the Schema Registry. DOH! Hope this helps for at least someone else!
In my C# test using the Confulent.Kafka and Confluent.SchemaRegistry the (username:password) are that exact syntax with the (:) colon in one string
string credentials ="MyUserName:mypassword";
var schemaRegistryConfig = new SchemaRegistryConfig()
{
Url = config.GetValue<string>("ConfluentCloud:SchemaRegistry:Url", string.Empty),
BasicAuthUserInfo = config.GetValue<string>("ConfluentCloud:SchemaRegistry:Credentials", string.Empty),
};
// no serializer required for string key
using (var schemaRegistry = new CachedSchemaRegistryClient(schemaRegistryConfig))
... etc. etc.

Forward ASP.Net WebAPI request to another API

I am trying to forward request from one API to another one like this:
protected Task<HttpResponseMessage> ForwardRequestToSomeApi()
{
string forwardUri = "https://some.api" + Request.RequestUri.PathAndQuery;
Request.Headers.Remove("Host");
Request.RequestUri = new Uri(forwardUri);
if (Request.Method == HttpMethod.Get)
{
Request.Content = null;
}
return new HttpClient().SendAsync(Request, HttpCompletionOption.ResponseHeadersRead);
}
but when sending PUT request I get:
Cannot close stream until all bytes are written.
Full exception info:
{"Message":"An error has occurred.","ExceptionMessage":"An error occurred while sending the request.","ExceptionType":"System.Net.Http.HttpRequestException","StackTrace":"
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n
at System.Threading.Tasks.TaskHelpersExtensions.<CastToObject>d__1`1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n
at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n
at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__5.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n
at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__6.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n
at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__6.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n
at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__15.MoveNext()","InnerException":{"Message":"An error has occurred.","ExceptionMessage":"The request was aborted: The request was canceled.","ExceptionType":"System.Net.WebException","StackTrace":"
at System.Net.ConnectStream.CloseInternal(Boolean internalCall, Boolean aborting)\r\n
at System.Net.ConnectStream.System.Net.ICloseEx.CloseEx(CloseExState closeState)\r\n
at System.Net.ConnectStream.Dispose(Boolean disposing)\r\n
at System.IO.Stream.Close()\r\n
at System.Net.Http.HttpClientHandler.<>c__DisplayClass109_0.<GetRequestStreamCallback>b__0(Task task)","InnerException":{"Message":"An error has occurred.","ExceptionMessage":"Cannot close stream until all bytes are written.","ExceptionType":"System.IO.IOException","StackTrace":"
at System.Net.ConnectStream.CloseInternal(Boolean internalCall, Boolean aborting)"}}}
Inner exception :
IOException Message: "Cannot close stream until all bytes are
written." StackTrace: at
System.Net.ConnectStream.CloseInternal(Boolean internalCall, Boolean
aborting)
Update:
Provided above code is fully working, the problem was how I attempted to use it. In my main API I had next webapi action:
[HttpPut]
public Task<HttpResponseMessage> Create(string id, Foo model)
{
return ForwardRequestToSomeApi();
}
The problem here is I introduced the model in parameters, thanks to model binding request's content were being read and parsed into model, so when I forward request to another API I send request without content. The fix is to remove all parameters:
[HttpPut]
public Task<HttpResponseMessage> Create()
{
return ForwardRequestToSomeApi();
}

Weird Json conversion error using lambda

I have a Json document being sent to a Web API that is converted to an array of Addresses. If I send one address the following code works, but if I send two it dies a nasty death. Any ideas?
Input to web service that is failing looks like this:
[
"\"TrackingIdTest_2\"",
"[
{\"CustomerAddressKey\":\"1\",\"Address\":\"6069 W STUDIO CT\",\"City\":\"LOS ANGELES\",\"State\":\"CA\",\"Zipcode\":\"\"}
,{\"CustomerAddressKey\":\"2\",\"Address\":\"1095 6th Ave\",\"City\":\"NEW YORK\",\"State\":\"NY\",\"Zipcode\":\"\"}
]"
]
If I send this it works:
[
"\"TrackingIdTest_2\"",
"[
{\"CustomerAddressKey\":\"1\",\"Address\":\"6069 W STUDIO CT\",\"City\":\"LOS ANGELES\",\"State\":\"CA\",\"Zipcode\":\"\"}
]"
]
The code that is throws the error is the following:
var addressesInternal = new List<RequestAddressInternal>();
addresses.ToList().ForEach(x =>
{
addressesInternal.Add(new RequestAddressInternal()
{
InternalAddressKey = Guid.NewGuid().ToString(),
RequestAddress = x
});
});
Addresses is defined like so:
RequestAddress[] addresses
// Defined in a Model class:
public class RequestAddress
{
public string CustomerAddressKey { get; set; }
public string Address { get; set; }
public string City { get; set; }
public string State { get; set; }
public string Zipcode { get; set; }
}
RequestAddressInternal looks like this:
public class RequestAddressInternal
{
public string InternalAddressKey { get; set; }
public RequestAddress RequestAddress { get; set; }
}
The error I get back from the web service is this:
{
"Message": "An error has occurred.",
"ExceptionMessage": "This document already has a 'DocumentElement' node.",
"ExceptionType": "System.InvalidOperationException",
"StackTrace": " at System.Xml.XmlDocument.IsValidChildType(XmlNodeType type)\r\n at System.Xml.XmlNode.AppendChild(XmlNode newChild)\r\n at Newtonsoft.Json.Converters.XmlNodeWrapper.AppendChild(IXmlNode newChild)\r\n at Newtonsoft.Json.Converters.XmlNodeConverter.CreateElement(JsonReader reader, IXmlDocument document, IXmlNode currentNode, String elementName, XmlNamespaceManager manager, String elementPrefix, Dictionary`2 attributeNameValues)\r\n at Newtonsoft.Json.Converters.XmlNodeConverter.ReadElement(JsonReader reader, IXmlDocument document, IXmlNode currentNode, String propertyName, XmlNamespaceManager manager)\r\n at Newtonsoft.Json.Converters.XmlNodeConverter.DeserializeValue(JsonReader reader, IXmlDocument document, XmlNamespaceManager manager, String propertyName, IXmlNode currentNode)\r\n at Newtonsoft.Json.Converters.XmlNodeConverter.DeserializeNode(JsonReader reader, IXmlDocument document, XmlNamespaceManager manager, IXmlNode currentNode)\r\n at Newtonsoft.Json.Converters.XmlNodeConverter.ReadJson(JsonReader reader, Type objectType, Object existingValue, JsonSerializer serializer)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.DeserializeConvertable(JsonConverter converter, JsonReader reader, Type objectType, Object existingValue)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)\r\n at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)\r\n at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings)\r\n at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonConverter[] converters)\r\n at Newtonsoft.Json.JsonConvert.DeserializeXmlNode(String value, String deserializeRootElementName, Boolean writeArrayAttribute)\r\n at Midas.WebApi.waCarrierServiceabilityLib.CarrierServiceabilityImpl.ProcessBulkImpl(String serviceRequest, String clientId, String clientRequestTrackingId, RequestAddress[] addresses, String clientOwner, String uid, String ipAddress, Boolean includeGeodata) in E:\\Source Code\\GitHub\\waCarrierServiceability\\waCarrierServiceabilityLib\\CarrierServiceabilityImpl.cs:line 222\r\n at Midas.WebApi.waCarrierServiceabilityLib.CarrierServiceabilityImpl.ProcessBulk(String serviceRequest, JArray requestRaw, String clientId, String clientOwner, String userId, String ipAddress, Boolean includeGeodata) in E:\\Source Code\\GitHub\\waCarrierServiceability\\waCarrierServiceabilityLib\\CarrierServiceabilityImpl.cs:line 134\r\n at Midas.WebApi.waCarrierServiceability.Controllers.CarrierServiceabilityController.GetCarrierServiceabilityBulk(JArray jsonParamList) in E:\\Source Code\\GitHub\\waCarrierServiceability\\Controllers\\CarrierServiceability.cs:line 120\r\n at lambda_method(Closure , Object , Object[] )\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments)\r\n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Tracing.ITraceWriterExtensions.<TraceBeginEndAsyncCore>d__18`1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Tracing.ITraceWriterExtensions.<TraceBeginEndAsyncCore>d__18`1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Tracing.Tracers.HttpControllerTracer.<ExecuteAsyncCore>d__5.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Tracing.ITraceWriterExtensions.<TraceBeginEndAsyncCore>d__18`1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"
}
At this point I'm wondering if it's some time type of threading issues? I wrapped the code that is the last to execute in a try catch and caught exception, however no exception was thrown, it just never makes it to the next line in the code.

I'm not able to give a complete answer unfortunately, but having a look, a couple of things that might be worth trying:
It looks potentially that the Json parsing to get your input string to the array addresses might be failing (so that when you get to this stage in the code, it's not the two parsed Json strings you're expecting). You could try setting a break point on this line in the debugger, and checking what addresses is equal to?
Sometimes with LINQ it can be tricky to see what's going on until after the lambda call (x => ...) has been returned. To get around this you can set a temporary variable:
var temp = addresses.ToList();
and then you can use this value to check what happens with the first element in the list temp, if you apply the following steps in your code. Stepping through with the debugger may help to see where the error is coming in?
Again apologies that this is just a list of possible ideas, but hope you're able to solve your problem!

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?