Forum Discussion

CraigM_17826's avatar
CraigM_17826
Icon for Altostratus rankAltostratus
Dec 21, 2009

switch command

Hi all,

 

 

[Update: fixed the redirect issues so I've removed the examples from the thread. It was just my dyslexic typing]

 

 

I'm trying to clean up and optimise some of my iRules. Currently I have quite a large block of if blocks for pool selections. The basic form follows

 

 

if { [[string tolower [HTTP::uri]] contains "sometext" }{

 

pool "pool-name"

 

return

 

}

 

 

This all works. I have now tried the follwoing switch commands for the above cases

 

 

switch -glob [string tolower [HTTP::uri]] {

 

"sometext" {pool pool-name}

 

"sometext" {pool pool-name2}

 

}

 

 

What happens though is that the pool commands dont seem to work, I just get an error back from the webserver on the default pool saying the directory (as supplied by "sometext" does not exist.

 

 

I have tried with and without the -glob option and it doesn't seem to make a difference. I have run out of ideas at the moment. Any suggestions welcome.

 

 

Regards

 

 

Craig

 

 

 

 

application delivery
dev
devops
iRules

2 Replies

Sort By
  • The_Bhattman's avatar
    The_Bhattman
    Icon for Nimbostratus rankNimbostratus
    Dec 21, 2009
    Hi Craig,

     

    Seems like the irule is working in that it see's sometext in the URI and sends into the pool, but the webserver in the pool complaining there is no director for the content. Have you tried pointing directly to the webserver (bypassing the load balancer) to see if the problem is not on the its end?

     

     

    Bhattman
  • CraigM_17826's avatar
    CraigM_17826
    Icon for Altostratus rankAltostratus
    Dec 21, 2009
    Hi Bhattman,

     

     

    thanks for the reply. Actually I rejigged the rule slightly and put in some log statements to see what was going on. It goes somthing like this

     

     

    switch -glob [string tolower [HTTP::uri]] {

     

    "/sometext" {

     

    log "Using pool1 for URI [HTTP::uri]"

     

    pool pool1

     

    }

     

    "/sometext2" {

     

    log "Using pool2 for URI [HTTP::uri]"

     

    pool pool2

     

    }

     

    }

     

    log local0. "URI: [HTTP::uri]"

     

     

    What I noticed was that the cases were not matching yet the last log statement was inidcating the specified URI should have matched. For example if I entered http://webserv.com/sometext the switch would not match byt the log statement would indicate the URI was in fact /sometext. The same applied to all the cases in the switch statement, they all failed yet the log statement indicated they should have matched.

     

     

    Craig