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Forum Discussion

Eljay's avatar
Eljay
Icon for Cirrus rankCirrus
Jun 27, 2019

Using SCAN to validate an URI

I need to validate an URI. I'd like to use a policy but iRule works as well.   I need to check if an URI is between 2 and 8 characters long and that it contains only digits and upper or lower lette...
application delivery
iRules
Stanislas_Piro2's avatar
Stanislas_Piro2
Icon for Cumulonimbus rankCumulonimbus
Jun 28, 2019
  1. URI always starts with / so your regex expression may not work.
  2. scan command is not the best solution to define length filtering

 

You can use following code in you irule to check both length filtering and format:

 

set uri [string range [HTTP::uri] 2 end]
if {([set length [string length $uri]] == 8 || $length == 2 ) && [string is alnum $uri ]} {
  #actions if true
} else {
  #actions if false
}