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smp_86112's avatar
smp_86112
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Jan 03, 2014
Solved

Short iRule rewrite for efficiency/readability

I have a short iRule that is simple to understand. Logically, the iRule works by checking the host header against two known values and modifies the Host: header if neither match. This is how it's cur...
application delivery
devops
iRules
  • Ben_Wilson_2412's avatar
    Ben_Wilson_2412
    Jan 03, 2014

    Don't know that you need to negate the match, just perform no action on matching "myapp1" or "myapp2" and use the default case to perform your replace.

     

smp_86112's avatar
smp_86112
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Jan 03, 2014

That never occurred to me. Were you thinking of something like this?

when HTTP_REQUEST {
  switch -- [string tolower [HTTP::host] {
    "myapp1.example.com" -
    "myapp2.example.com" { }
    default { HTTP::header replace "Host" [HTTP::host]:9070 }
  }
}
  • smp_86112's avatar
    smp_86112
    Icon for Cirrostratus rankCirrostratus
    Jan 03, 2014
    I tried this and it worked perfectly, and it makes much more sense to read. Exactly what I was looking for. Don't understand why it didn't occur to me to write it this way, but thanks for the idea!!