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collinz1_17223's avatar
collinz1_17223
Icon for Nimbostratus rankNimbostratus
Jun 06, 2011

irule active_members <1 and MSIE 7

I have an irule that returns HTML when all pool members are down, this works fine, hower what i now want to do is return different HTML if users are using IE7. It would be great to be able to return differnt HTML for multiple other browsers (IE6 & IE7) also.

 

 

when HTTP_REQUEST {

 

if { ([active_members [LB::server pool]] < 1) and ( [string tolower [HTTP::header User-Agent]] eq [string tolower "*msie 7.*"])} {

 

HTTP::respond 200 content {

 

...

 

 

elseif { [active_members [LB::server pool]] < 1} {

 

HTTP::respond 200 content {

 

...

 

application delivery
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devops
iRules
  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Jun 06, 2011
    when HTTP_REQUEST {

     

    if {[active_members [LB::server pool]] < 1} {

     

    if {[string tolower [HTTP::header User-Agent]] contains "msie 7"} {

     

    do something

     

    } else {

     

    do something else

     

    }

     

    }

     

    }
  • collinz1_17223's avatar
    collinz1_17223
    Icon for Nimbostratus rankNimbostratus
    Jun 06, 2011
    Thats great thanks. How would i specify multiple agents in the same line? I have tried the following as an example, but it doesnt appear to work:

     

     

    when HTTP_REQUEST {

     

    if {[active_members [LB::server pool]] < 1} {

     

    if {[string tolower [HTTP::header User-Agent]] contains "msie 7" or "msie 6"} {

     

    do something

     

    } else {

     

    do something else

     

    }

     

    }

     

    }
  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Jun 06, 2011
    i think matchclass/class with data group should be good. what bigip version r u running?

     

     

    matchclass

     

    http://devcentral.f5.com/wiki/default.aspx/iRules/matchclass.html

     

     

    class

     

    http://devcentral.f5.com/wiki/default.aspx/iRules/class.html
  • collinz1_17223's avatar
    collinz1_17223
    Icon for Nimbostratus rankNimbostratus
    Jun 06, 2011
    i have setup a data group (called msie) with string values of msie 6 & msie 7 and attempted to reference the group in an irule, but it doesn't appear to be working. Traffic seems to be matching my "else" statement.

     

     

    when HTTP_REQUEST {

     

    if {[active_members [LB::server pool]] < 1} {

     

    if {[class match [HTTP::header User-Agent] equals "msie" ] } {

     

    do something

     

    } else {

     

    do something else

     

    }

     

    }

     

    }

     

  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Jun 06, 2011
    can u try this one?

     

     

    when HTTP_REQUEST {

     

    if {[active_members [LB::server pool]] < 1} {

     

    if {[class match [HTTP::header User-Agent] contains msie]} {

     

    do something

     

    } else {

     

    do something else

     

    }

     

    }

     

    }
  • Colin_Walker_12's avatar
    Colin_Walker_12
    Historic F5 Account
    Jun 06, 2011
    You'll almost certainly want to use contains, not equals, otherwise you'll have to have the entire and exact entry in the class, and that would be a pain given all the different possible user agent strings. You'll also want to be sure that you're forcing everything to either upper or lowercase for the comparison.

     

     

    Something like : [class match [string tolower [HTTP::header User-Agent]] contains "msie"]

     

     

    Colin
  • collinz1_17223's avatar
    collinz1_17223
    Icon for Nimbostratus rankNimbostratus
    Jun 07, 2011
    That did indeed work, thanks.

     

    I now have an irule that returns one set of HTML for IE7 and IE6 users when all pool members are down and a different set of HTML for all other users.