Forum Discussion

Squeak's avatar
Squeak
Icon for Cirrus rankCirrus
Jan 31, 2020

Modify APM variable value

Hello,

I have a variable that contains a 12 digit numeric value and I want to add a hyphen between the 8th and 9th digits.

The variable looks like this at the moment,

E.g

109511158543

I want it to look like this.

10951115-8543

The variable are a Active Directory attribute and the numeric value are different for different users.

Any takes?

//Cheers Mike

application delivery
BIG-IP Access Policy Manager (APM)
  • Stanislas_Piro2's avatar
    Stanislas_Piro2
    Feb 06, 2020

    I guess ;)

     

    here are my tests:

     

    variable assign:

     

    1 - session.custom.source = Text 109511158543 

    2 - session.custom.target = join [scan [mcget {session.custom.source}] "%8s%4s"] "-"

     

    After authenticationI have following variables:

    session.custom.source 109511158543

    session.custom.target 10951115-8543

  • NUT2889's avatar
    NUT2889
    Icon for Cirrostratus rankCirrostratus
    Feb 03, 2020

    Hi,

     

    I'm not sure the expression under APM visual policy is support or not.

     

    But i have one idea for you.

    • Use the APM to call iRule : https://support.f5.com/csp/article/K13296
    • Use iRule to replace the value : https://devcentral.f5.com/s/articles/intermediate-irules-handling-strings-20429
  • Stanislas_Piro2's avatar
    Stanislas_Piro2
    Icon for Cumulonimbus rankCumulonimbus
    Feb 03, 2020

    You can add a variable assign in VPE, with expression like

    set var [mcget {session.xxx.xxx}]
return "[string range $var 0 7]-[string range $var 8 end]"
      • Squeak's avatar
        Squeak
        Icon for Cirrus rankCirrus
        Feb 05, 2020

        I tried your solution but I didn´t get it to work. I added a Variable assign in the VPE like this,

        session.session.custom.xx = join [scan [mcget {session.session.session.custom.xx}] "%8s%4s"] "-"

        Or maybe I did something wrong?

        //Mike