[Mono-dev] Response.Redirect possible exception when using forms authentication

Dieter Bremes dbjobs at snafu.de
Fri Dec 16 06:31:39 EST 2005

Carlos Solorzano wrote:
> On Dec 16, 2005, at 2:55 AM, Carlos Solorzano wrote:
>> I am using forms authentication with XSP on mono
>> Whenever a user logs in, sometimes, the login page never responds  
>> after entering the username and password. I went ahead and tried to  
>> figure out where its getting stuck. I am almost certain now that  the 
>> End() method on HttpResponse.cs can throw the exception given  below. 
>> Try Catching that exception makes my forms authentication  work 
>> correctly almost always now.
>> Is there maybe something wrong I could be doing on my code? I know  
>> that sometimes having Try Catch blocks on Redirects can cause  
>> problems but I don't have any as far as I can tell, either-way I  
>> think an error should be shown to the user if thats the case, right  
>> now the code just doesn't respond.
>> Anyways here is the exception:
>> System.Threading.ThreadAbortException: Thread was being aborted
>> in (wrapper managed-to-native)  
>> System.Object:__icall_wrapper_mono_thread_interruption_checkpoint ()
>> in (wrapper managed-to-native)  System.Threading.Thread:Abort_internal 
>> (object)
>> in <0x0001a> System.Threading.Thread:Abort (System.Object stateInfo)
>> in <0x00071> System.Web.HttpResponse:End ()
> I changed my code to not do a RedirectFromLoginPage() but instead get  
> the authentication cookie and do a Response.Redirect(url,FALSE), and  
> that FALSE made it all work again. What I don't understand is what is  
> keeping the thread from being aborted, is there an easy way to find  
> that out? and why is no error actually showing up on the page?
> --Carlos
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Hi Carlos,

looks like in FormsAuthentication.cs

public static void RedirectFromLoginPage (...)
   // ...
   Redirect (GetRedirectUrl (userName, createPersistentCookie));

should be

public static void RedirectFromLoginPage (...)
   // ...
   Redirect (GetRedirectUrl (userName, createPersistentCookie), false);

http://weblogs.asp.net/bleroy/archive/2004/08/03/207486.aspx explains it.


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