UrlRewrite: Server cannot append header after HTTP headers have been sent

[Navilois]

Describe the bug

Directly related to #112 When the alternative PageUrl of a product (in this case the uppercase url "GR33L") is requested, the exception "Server cannot modify cookies after HTTP headers have been sent." is thrown once Hotcakes.

Software Versions

• DNN: 09.04.01
• Hotcakes: 03.02.01 #196 and #218 implemented

To Reproduce

Steps to reproduce the behavior:

1. Edit a product and set another Page URL
2. Clear caches and request the old Page URL (301)
3. Check Admin Logs
4. See error

Expected behavior

Do a clean 301, set whatever cookies necessary

Actual behavior

Does a 301, but throws exception and doesn't modify cookies (most likely)

Error log

10/22/2019 13:15:52 Hotcakes Exception Sierzega Severity Error AssemblyVersion 3.2.1 PortalID 0 PortalName Sierzega UserID Severity:Error AssemblyVersion:3.2.1 PortalID:0 PortalName:Sierzega UserID: UserName: ActiveTabID:92 ActiveTabName:Product Viewer RawURL:/en-us/Products/Product-Viewer/GR33L AbsoluteURL:/Default.aspx AbsoluteURLReferrer: UserAgent:Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0 DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke ExceptionGUID:593cde48-18bd-49da-830b-87936522039b InnerException:Server cannot modify cookies after HTTP headers have been sent. FileName: FileLineNumber:0 FileColumnNumber:0 Method:System.Web.HttpResponse.BeforeCookieCollectionChange StackTrace: Message: System.Web.HttpException (0x80004005): Server cannot modify cookies after HTTP headers have been sent. at System.Web.HttpResponse.BeforeCookieCollectionChange() at System.Web.HttpCookieCollection.Add(HttpCookie cookie) at Hotcakes.Commerce.SessionManager.SetCookieString(String cookieName, String value, Nullable`1 expirationDate, Boolean secure) Source:

[Navilois]

Additional Logs of the live server (DNN 09.03.02, Hotcakes 03.02.00). Usually a Hotcakes exception followed by a DNN exception:

10/22/2019 12:28:43 Hotcakes Exception

Sierzega Severity Error AssemblyVersion 3.2.0 PortalID 0 PortalName Sierzega UserID Severity:Error AssemblyVersion:3.2.0 PortalID:0 PortalName:Sierzega UserID:-1 UserName: ActiveTabID:92 ActiveTabName:Product Viewer RawURL:/en-us/Products/Product-Viewer/GR33L AbsoluteURL:/Default.aspx AbsoluteURLReferrer: UserAgent:Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm) DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke ExceptionGUID:826b3daa-cf93-4986-aca6-0c7a3e35a718 InnerException:Server cannot modify cookies after HTTP headers have been sent. FileName: FileLineNumber:0 FileColumnNumber:0 Method:System.Web.HttpCookieCollection.Add StackTrace: Message: System.Web.HttpException (0x80004005): Server cannot modify cookies after HTTP headers have been sent. at System.Web.HttpCookieCollection.Add(HttpCookie cookie) at Hotcakes.Commerce.SessionManager.SetCookieString(String cookieName, String value, Nullable`1 expirationDate, Boolean secure) Source:

10/22/2019 12:28:44 Page Load Exception

Sierzega AbsoluteURL /Default.aspx DefaultDataProvider DotNetNuke.Data.SqlDataProvi AbsoluteURL:/Default.aspx DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke ExceptionGUID:77821b91-1e1a-4c2e-9794-0e388e516bee AssemblyVersion: PortalId:-1 UserId:-1 TabId:-1 RawUrl: Referrer: UserAgent: ExceptionHash:okiGYRPhenUZgy2cXP624B2BD9k= Message:Server cannot modify cookies after HTTP headers have been sent. StackTrace: InnerMessage:Server cannot modify cookies after HTTP headers have been sent. InnerStackTrace: at System.Web.HttpCookieCollection.Set(HttpCookie cookie) at System.Web.Helpers.AntiXsrf.AntiForgeryWorker.GetFormInputElement(HttpContextBase httpContext) at System.Web.Helpers.AntiForgery.GetHtml() at DotNetNuke.Framework.ServicesFrameworkImpl.RegisterAjaxAntiForgery(Page page) at DotNetNuke.Framework.PageBase.OnPreRender(EventArgs e) at DotNetNuke.Framework.DefaultPage.OnPreRender(EventArgs evt) at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) Source: FileName: FileLineNumber:0 FileColumnNumber:0 Method:

[WillStrohl]

Thank you for reporting this. This is a duplicate issue, though. :)

Please see issue #112

[Navilois]

I just tested it on 03.02.02, the issues still exists. Quoting you from #112:

This has been confirmed to be resolved in the pending 03.02.02 release, but only during checkout. There is another instance that may occur, but it hasn't yet been determined when/how.

Can we reopen one of the two issues?

Current log:

11/07/2019 10:17:15 Hotcakes Exception xxx Sierzega Severity Error AssemblyVersion 3.2.2 PortalID 0 PortalName Sierzega UserID Severity:Error AssemblyVersion:3.2.2 PortalID:0 PortalName:Sierzega UserID: UserName: ActiveTabID:92 ActiveTabName:Product Viewer RawURL:/en-us/Products/Product-Viewer/GR33L AbsoluteURL:/Default.aspx AbsoluteURLReferrer: UserAgent:Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0 DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke ExceptionGUID:53c1ecfc-22e7-4e7b-96c0-ff901a4279d4 InnerException:Server cannot modify cookies after HTTP headers have been sent. FileName: FileLineNumber:0 FileColumnNumber:0 Method:System.Web.HttpResponse.BeforeCookieCollectionChange StackTrace: Message: System.Web.HttpException (0x80004005): Server cannot modify cookies after HTTP headers have been sent. at System.Web.HttpResponse.BeforeCookieCollectionChange() at System.Web.HttpCookieCollection.Add(HttpCookie cookie) at Hotcakes.Commerce.SessionManager.SetCookieString(String cookieName, String value, Nullable`1 expirationDate, Boolean secure) Source:

[WillStrohl]

Oh, I see. You're right. The error was only fixed during checkout. Sorry about that. :)