irule pool selection based on dynamic cookie value

Hi,

you can use following code:

when CLIENT_ACCEPTED { 
    set default_pool [LB::server pool]
}

when_HTTP_REQUEST {
    set target ""
    if { [string tolower [HTTP::path]] equals "/foo/" } {
        set target "foo"
    } elseif { [string tolower [HTTP::path]] equals "/bar/" } {
        set target "bar"
    }
    if { [HTTP::cookie exists "myCookie"] && $target equals "" } {
         target is empty, get target from cookie
        set target [HTTP::cookie value "myCookie"]
    } elseif { (![HTTP::cookie exists "myCookie"] && $target ne "") || [HTTP::cookie value "myCookie"] ne $target } {
         cookie value is empty or value is wrong, inject cookie with right value is response.
        set inject_cookie $target
    }
    switch $target {
        foo {pool foo}
        bar {pool bar}
        default {pool $default_pool}
    }
}

when HTTP_RESPONSE {
    if {[info exists inject_cookie]} {
        HTTP::cookie insert name myCookie value $inject_cookie
        unset inject_cookie
    }
}