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cody8411_186897's avatar
cody8411_186897
Icon for Nimbostratus rankNimbostratus
Jan 29, 2016

Handling www with host name redirects in iRule

I'm trying to figure out how I can handle the following situation.   The section of the iRule below is for redirecting to a different URL based on a hostname. Our organization has purchased multipl...
application delivery
hostname
iRules
LTM
redirect
Kai_Wilke's avatar
Kai_Wilke
Icon for MVP rankMVP
Jan 29, 2016

Hi Cody,

you may try the performance optimized snippet below. It would require just a single data group query to check for existence and to retrieve the location value...

when HTTP_REQUEST {
    if { [HTTP::host] starts_with "www." } then {
        if { [set location [class match -value [string range [HTTP::host] 4 end] eq group_80_host_redirect]] ne "" } then {
            HTTP::redirect $location
            return
        }
    } else { 
        if { [set location [class match -value [HTTP::host] eq group_80_host_redirect]] ne "" } then {
            HTTP::redirect $location
            return
        }
    }
    HTTP::redirect "https://www.company.com/unknown_hostname/error.html?host=[URI::encode [HTTP::host]]"
}

Cheers, Kai