TCL error with local variable

Thanks Aaron for your answer but I do not understand how I could not use the variables as I need to keep the first url used by the client to modify the uri after the redirection. For example:

 

 

Request 1 is: https://app1.be/secureapp1

 

Our server redirect the user to https://app1.be/loginproxy (but I need to keep the first url in the headers as the backend will use it to write the next redirection.

 

Request 2: The client goes to https://app1.be/authentication a cookie is done and the server perform another redirection to the URL written in the header (target = $$road)

 

Request 3: the user go to the first url with the authentication information.

 

 

Problem is, with my irule, when the client goes to /loginproxy, when I insert the content of the variable in the header, variable seems not to exist. I can not use directly HTTP::uri is it no more the first url requested.

 

 

Thanks.