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Forum Discussion

atoth's avatar
atoth
Icon for Cirrus rankCirrus
Aug 10, 2015

How to do a NOT URI with switch -glob

There is a VIP with an irule on it using the switch -glob format. Something like

switch [HTTP::uri] {
"/foo/* -
"/bar/* { pool blah 
} default { pool default
}
}

Now the application team that own the VIP would like to change that to something like

switch [HTTP::uri] {
**NOT** "/foo/* -
"/bar/* { pool blah 
} default { pool default
}
}

So that if the conditions do not match either /foo/ or /bar/, than redirect to pool blah. Not sure what the right syntax for that would be.

application delivery
devops
iRules

1 Reply

  • VernonWells's avatar
    VernonWells
    Icon for Employee rankEmployee
    Aug 10, 2015

    Without resorting to regular expression matching (which should be avoided), I believe there is no way to do the kind of negation that you are describing with a 

    switch
    . This leaves you with two options:

    switch [HTTP::uri] {
    "/bar/*"    { pool blah }
    default {
        if { !([HTTP::uri] starts_with "/foo/") } {
            pool blah
        }
        else {
            pool default
        }
    }
}

    or

    if { [HTTP::uri] starts_with "/bar/" || !([HTTP::uri] starts_with "/foo/") } { pool blah }

    then just set the VS default pool to "default". Unhappily, in this, you can't avoid the double-evaluation in the worst case.