Confirm Email problem with token, valid time for code

Question

User-1949524191 posted

Dear All

I have very strange problem with Identity 2.0, during creating new user is genereting email confirm link, when I try use email link after short time everything is fine but when I try use email link after a few hours (2 hours) I got error:

"EmailConfirm  Exception: System.NullReferenceException: Object reference not set to an instance of an object.   at ASP._Page_Views_Shared_Error_cshtml.Execute ...",

IdentityConfig.cs

 if (dataProtectionProvider != null)
            {
                manager.UserTokenProvider =
                    new DataProtectorTokenProvider<ApplicationUser>(dataProtectionProvider.Create("ASP.NET Identity"))
                    {
                        TokenLifespan = TimeSpan.FromDays(7)                 
                    };
            }

As you can see I have set this property for 7 days.

Web.config

 <system.web>  
    <compilation debug="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" maxRequestLength="52428800" executionTimeout="60" />
    <roleManager enabled="false"  />
    <globalization culture="en-GB" uiCulture="en-GB" />
    <customErrors mode="Off" />   
  </system.web>  
  <system.webServer>
    <modules>      
      <remove name="FormsAuthentication" />
    </modules>
  </system.webServer>

Moreover I read in documentaton that default expire time for this code is 24 hrs, is it true?

Is there something miss? I have not idea how to resolve it. Any help will be appreciated.

Regards

Krzysztof

Answer 1

User-986267747 posted

Hi kszymaniak,

Moreover I read in documentaton that default expire time for this code is 24 hrs, is it true?

TokenLifespan = TimeSpan.FromDays(7)

Yes, The default TokenLifespan is one day. In my experience, with the code above, we could set the UserTokenProvider token expiration, the email confirmation tokens  will expire in 7 days. Your code seems fine. You could find the related information in the following link.

http://www.asp.net/identity/overview/features-api/account-confirmation-and-password-recovery-with-aspnet-identity

when I try use email link after short time everything is fine but when I try use email link after a few hours (2 hours) I got error:

"EmailConfirm  Exception: System.NullReferenceException: Object reference not set to an instance of an object.   at ASP._Page_Views_Shared_Error_cshtml.Execute ...",

According to the error message, i'm not sure why do we get this problem. I suggest that you could debug your code and find the code line where caused this problem.

Best Regards,

Klein zhang

Answer 2

User-1949524191 posted

Thank you Klein for yr reply.

I looked into link and quote:

"In the Package Manager Console,  enter the following the following commands:

Install-Package SendGrid (not installed, I am using smtp client)
Install-Package -Prerelease Microsoft.AspNet.Identity.Samples (I am not sure that installed, I have to check, but in short time is working)"

Debug. The web is building with succsesfull with option "Debug" I think that problem is with expire time for security code. 

Regards

Krzysztof

Answer 3

User-1949524191 posted

Dear All

I have additional question about it, pls let me knoe if token code is storing in session? I mean

<sessionState mode="StateServer" ... />          

Thanks

Regards

Answer 4

User-1949524191 posted

I think I found solution, problem is with hosting which stops the processes after 30 minutes inaction on web and session in mode "In-Process" which is killing all sessions after stops the processes. In my case should only add in Web.config file in <system.web> section

 <sessionState mode="StateServer" timeout="120" stateConnectionString="tcpip=127.0.0.1:right-port" cookieless="false" />
 <machineKey validationKey="...." decryptionKey="...." validation="SHA1" decryption="AES" />

where "timeout" is valid session in minutes. I set only 2 hrs for tests. I canceled  "TokenLifespan = TimeSpan.FromDays(7)"

And voila.

I hope that I wrote with understanding in English.

Regards

Krzysztof