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annielee_13548's avatar
annielee_13548
Icon for Nimbostratus rankNimbostratus
May 13, 2015
Solved

irules optimization

Hi, I am trying to optimize the irules below (to a for each loop, if possible) im modifying and need some programming help 🙂 if { ([HTTP::host] contains "env-1") || ([HTTP::host] contains "1.1....
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  • nitass_89166's avatar
    nitass_89166
    May 13, 2015

    can you try something like this?

    when HTTP_REQUEST {
  switch -glob [HTTP::host] {
    "*env-1" -
    "1.1.1.1*" {
       Do something
    }
    "*env-2*" -
    "1.1.1.2*" {
       Do something
    }
    default {
       Do something
    }
  }
}
nitass's avatar
nitass
Icon for Employee rankEmployee
May 14, 2015

coz in the existing irules now, there are a lot of IFs and some ifs are comparing the URI (with equals, ends with, contains), some comparing variables, some comparing headers. I would like to modify the rules to be 'better', hence you recommended the switch -glob

 

i do not think switch is always the best. you do not need to change all condition check to switch. it should be pretty fine as long as irule is easy to understand and maintain.

 

Comparing iRule Control Statements by Joe Pruitt

 

https://devcentral.f5.com/articles/comparing-irule-control-statements

 

just my 2 cents.