iRule for Shibboleth integration

I know that APM module can replace Shibboleth SP but company doesn't have a budget yet for that Shibboleth is fronted with F5 LTM (load balance and SSL offload) Shibboleth is integrated with Blackboard Learning System for authentication Problem is that lecturers post links to student subjects deep within Blackboard and these links don't reference Shibboleth The iRule would need to be placed on F5 to intercept these requests and route them to the Shibboleth for authentication

Hope this make sense