सर्वर हेडर संलग्न नहीं कर सकता HTTP हेडर फ़ाइलों को अपलोड करने

Question

मैं अपने asp.net MVC के 5 सी # वेब अनुप्रयोग में रहकर इस अपवाद प्राप्त भेज दिया गया है के बाद:

Server cannot append header after HTTP headers have been sent.

यह सिर्फ S3 विधि करने के लिए छवियों को अपलोड होता है (वेब ​​एपीआई नियंत्रक)।

Global.asax में 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"); 
      } 
     } 

विधि है कि त्रुटि उत्पन्न:

[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)); 


    } 

संपादित करें: अधिक जानकारी ... मैं अपने वेब एप्लिकेशन लचीला बीनस्टॉक में साथ की मेजबानी की है लोड बैलेंसर, लोड बैलेंसर ने एसएसएल प्रमाणपत्र स्थापित किया है, और लोड बैलेंसर और ईसी 2 उदाहरणों के बीच कनेक्शन पोर्ट्स 80 में हैं। शायद यह सहायक हो सकता है।

Elmah लॉग:

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(IDictionary 2 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.AuthenticationMiddleware 1.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.<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.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.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)

धन्यवाद !!

Answer 1

क्या आपने ऐप को हटाने के साथ प्रयास किया है। कॉन्टैक्ट.रेस्पॉन्स.हेडर। रिमूव ("सर्वर"); मुझे लगता है कि यह मुद्दा है?