iRule Array with string map redirects not working

Hello, I think you are combining curly braces with variables and this avoids their expansion. So, it should be something like this:

HTTP::respond 302 noserver Location "$new_destination[string map "$web_uri [HTTP::uri]" [HTTP::uri]]"

However, I think that the result will not be what you expect with those combinations, then, as a first shot, you could do like this:

HTTP::respond 302 noserver Location "$new_destination[string range [HTTP::uri] [expr [string len $web_uri]+1] end]"

Anyway, why do you not do that by using "data group" and "class match" to avoid iteration in their arrays? Maybe it could be more easy to do.

https://devcentral.f5.com/wiki/iRules.class.ashx

Another point,is the second part that seems to have the same effect when the operator "equals" and "starts_with", will have the same final execution, then it seems to me to be redundant and unnecessary to use the first operator "equals". Sorry if I did not analyze as a whole.

I think that's all, I hope I have helped you!

Regards.

Hi Eirikn,

I've to second Cjuniors opinion to use [class] instead of [array] for this specific task. The reason for this is, that an [array] can't be easily crawled in a $STRING starts_with [array names] fashion. Well, using a [foreach] loop will work, but its far away from being ideal... 😉

But if you still want to stick with this approach, then you may want to take a look to the iRule below.

It resolves your question be using a [string map -nocase [list $web_uri ""] [HTTP::uri]] and has some additional performance optimizations included (e.g. using RULE_INIT to define the [array]'s not on every request, removed the trailing / slashes from redirect locations, changed the code to use [array names], removed the duplicated execution of [string tolower [HTTP::host]] and finally combined the [if $host_header] statements.

BTW: I duno if a starts_with operator for every $host_header would be sufficient, too?

when RULE_INIT {
    unset -nocomplain static::pools
    array set static::pools {
            sliders.test.example.no                     pool_example_test
            bee.test.example.no                         pool_example_test
            tinypower.test.example.no                   pool_example_test
            tbank.test.example.no                       pool_example_test
            bank.test.example.no                        pool_example_test
            womvalley.test.example.no                   pool_example_test
            redakto-                                    pool_example_redaktor
            priceapi1-sitecore1.test.example.no         pool_example_redaktor
    }
    unset -nocomplain static::redirects
    array set static::redirects {
        /caf            https://banktest.portal.no/dummy-text_to_show-something-web
        /insurance      http://test.dummy.customer.no/example
        /cfs            https://cfs-ws-customer.vendor.no
    }
}

when HTTP_REQUEST {
    foreach web_uri [array names static::redirects] {
        if { [string tolower [HTTP::uri]] starts_with "$web_uri" } then {
            HTTP::respond 302 noserver Location "$static::redirects($web_uri)[string map -nocase [list $web_uri ""] [HTTP::uri]]"
            return
        }
    }
    foreach host_header [array names static::pools] {
        set low_host [string tolower [HTTP::host]]
        if { ($low_host equals $host_header) or 
             ($low_host starts_with $host_header) } then {
            pool $static::pools($host_header)
            return
        }
    }
    HTTP::respond 200 Content "This site does not exist"
}

Cheers, Kai

Hey guys,

Sorry for the late reply.

I got it working with your help, but eventually we changed the code so we did not need to stringmap rewrite.

Thanks for great input anyway!