Forum Discussion

skunk69_85565's avatar
skunk69_85565
Historic F5 Account
Nov 06, 2007

need to insert new info into HTTP query or uri

Hi everyone,     I need some advice here, please.     I am currently developing an iRule which will in the end send user requests to different pools based on IP addr, user agents, an exist...
application delivery
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devops
iRules
hoolio's avatar
hoolio
Icon for Cirrostratus rankCirrostratus
Nov 06, 2007
You're setting qstring to the value of [HTTP::query] in an else block, but I would guess that block isn't always being hit. So you get an error when trying to reference $qstring when it hasn't been set. You could either set it to some default value or check that it has been set before trying to use it. Here's an example of the latter using 'info exists' (Click here😞

if { [info exists qstring] && $qstring starts_with "/A"} {

[edit: you might also want to handle the default condition if the qstring isn't set or is set, but doesn't start with /A or /B.]


...
if { [info exists qstring] && $qstring starts_with "/A"} {
   pool poolA
} elseif { [info exists qstring] && $qstring starts_with "/B"} {
   pool poolB
} else {
   pool default_pool
}

Aaron