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Ian_Amos_37833's avatar
Ian_Amos_37833
Icon for Nimbostratus rankNimbostratus
Apr 27, 2007

Using [HTTP::hostname] & [HTTP::uri]..

Afternoon all,

 

 

there is probably a really easy solution for this, but i've not had any F5 training, and have run out of ideas..

 

 

To try and explain the situation;

 

 

there is a website www.example.com

 

there is also a UAT copy of the site uat.example.com

 

there is static content ..com/static/

 

and databases etc ..com/data/

 

 

each of the above are in their own Pools, but are represented by the same Public IP and virtual server.

 

 

So far I have an iRule to say

 

 

when HTTP_REQUEST {

 

if { ([HTTP::host] starts_with "uat") } {

 

HTTP::respond 200 content "<...test...>"

 

}

 

}

 

 

which works when I go to uat.example.com

 

 

How can I incorporate an "AND" statement in the iRule? i.e if HTTP::host starts_with "uat" AND HTTP::uri starts_with "/static/" etc.

 

 

I've tried using & but that doesn't work.. what am I doing wrong??

 

 

Thanks in advance for your help!
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5 Replies

  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Apr 27, 2007
    "&" is for bitwise operations. You can use "&&" for logical ANDing. Or you can just use "and"!

    Here's a reference:

    http://tmml.sourceforge.net/doc/tcl/expr.html

    Here's an example:

    
if {[HTTP::host] starts_with "uat" && [HTTP::uri] starts_with "/static/"}{

    This is equivalent to "and":

    
if {[HTTP::host] starts_with "uat" and [HTTP::uri] starts_with "/static/"}{

    Aaron
  • Ian_Amos_37833's avatar
    Ian_Amos_37833
    Icon for Nimbostratus rankNimbostratus
    Apr 27, 2007
    Thanks for the help! i'm sure I tried 'and' but think I had ()'s around each arguement, which it doesn't like..

     

     

    My next problem is with 'elseif'

     

     

    I'm using:

     

     

     

    when HTTP_REQUEST {

     

    if {[HTTP::host] starts_with "uat" && [HTTP::uri] starts_with "/static/"}{

     

    HTTP::respond <..etc..>

     

    } elseif { [HTTP::host] starts_with "uat" && [HTTP::uri] starts_with "/data/"}{

     

    HTTP::respond <..different etc..>

     

    }

     

    }

     

     

    I know i've now got the '&&' bit working, as with just the one IF statement, everything is fine. But I can't get anything after the 'elseif' to work..

     

     

    Thanks again for your help!
  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Apr 30, 2007
    The format you have posted should work. I tested the following and both the if and elseif actions worked:

    
when HTTP_REQUEST {
   if {[HTTP::host] starts_with "if" && [HTTP::uri] starts_with "/if"}{
      HTTP::respond 200 content "matched if"
   } elseif { [HTTP::host] starts_with "elseif" && [HTTP::uri] starts_with "/elseif"}{
      HTTP::respond 200 content "matched elseif"
   }
}

    Can you check the /var/log/ltm log file for errors when you test your rule?

    Also, you should be able to wrap conditions in ()'s. You would get an error if you used []'s to wrap the conditions though.

    Aaron
  • Ian_Amos_37833's avatar
    Ian_Amos_37833
    Icon for Nimbostratus rankNimbostratus
    Apr 30, 2007

    Posted By hoolio on 04/30/2007 2:41 AM

    Can you check the /var/log/ltm log file for errors when you test your rule?

    Aaron

    I can see this in the logs: 

    TCL error: Rule UAT-test HTTP_REQUEST - Operation not supported. Multiple redirect/respond invocations not allowed line 2 invoked from within HTTP::respond 200 content htmlheadtitleUAT test1/title/headbodydiv align=centertable border=0 width=60 id=table1trtdauat /...

    Any suggestions?

    What could I use as a "and if none of the above if statements are matched, ignore the whole rule"?

    Thanks again
  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Apr 30, 2007
    I didn't get any errors. I think the issue might be escaping for your response content. If you change the response content to "test", do you still get the TCL error? If not, you'll need to escape the metacharacters "[", "]" and quotes, in the HTML code of your response with backslashes (\).