问在发送HTTP标头上传文件后，服务器无法追加标头

EN

我在我的asp.net MVC5 c# web应用程序中间歇性地遇到此异常：

服务器无法在发送HTTP头之后追加标头。

它只是发生在上传图片到S3方法(Web )。

Global.asax中的presendrequestheaders

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");
            }
        }

触发错误的方法：

    [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));


    }

编辑：更多信息...我的Web应用托管在弹性BeanStalk中，有一个负载均衡器，负载均衡器安装了SSL证书，负载均衡器和EC2实例之间的连接是在端口80上。也许这会对你有所帮助。

Elmah日志：

System.Web.HttpException (0x80004005)：服务器无法在发送HTTP头之后追加标头。在System.Web.HttpHeaderCollection.SetHeader(String名称、字符串值、布尔替换)在Microsoft.Owin.Host.SystemWeb.CallHeaders.AspNetResponseHeaders.Set(String关键字，在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() -来自抛出异常的前一位置的堆栈跟踪结束-在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task任务)在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task任务)在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() -来自前一位置的堆栈跟踪结束抛出异常的位置-在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task任务)在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task任务)在Microsoft.AspNet.Identity.Owin.IdentityFactoryMiddleware`2.d__0.MoveNext() -从抛出异常的前一位置开始的堆栈跟踪结束-在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task任务)在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task任务)在Microsoft.Owin.Mapping.MapMiddleware.d__0.MoveNext() -来自抛出异常的前一位置的堆栈跟踪的结束-在Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.IntegratedPipelineContext.EndFinalWork(IAsyncResult的System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() )在System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()的System.Web.HttpApplication.ExecuteStep(IExecutionStep步骤，布尔值和completedSynchronously)

谢谢！！