Getting HTTPID AND PASSWORD using irule

hi,

Following the is the requirement, i need to get userid and password from F5 incoming request and post it to siteminder application url.

UseCase: 1. In coming request at F5 has id/pwd in HTTP header 2. Retrieve the id/pwd at F5 3. Post id/pwd by accessing a dummy web resource secured (by Siteminder) to Siteminder

i am new to F5 irule. i wrote the below script. please verify the below irule and advise me for any modification.

irule to retrieve the userid and password:

    when HTTP_REQUEST {

if {[HTTP::method] eq "POST"} {

if{[HTTP::header exists Authorization]}{
    set userID [HTTP::username]
    set pass [HTTP::password]

    log local0. $userID
    log local0. $pass  

if{[HTTP::uri] contains "/OAuthDemo/test.html"}{
    HTTP::redirect "http://siteminder:90/OAuthDemo/test.html"    
}
}
}

}