Forum Discussion
Sirisha_126707
Nimbostratus
NimbostratusiRule Redirection
This is a redirection rule from https://xyz.co.uk to https://abc.co.uk But only 1 in 10 requests should redirect initially. Follwing is the iRule I have implemented but it gets redirected even in 20th and 23rd attempts as well . I need exactly 1 in 10 requests to be redirected. Can someone please help ?
when RULE_INIT { set static::cookie_name "abc-stg" ; set static::threshold 10 ;} when HTTP_REQUEST { set cookie_value -1 if {[HTTP::cookie exists $static::cookie_name]} { set cookie_value [HTTP::cookie value $static::cookie_name] if {![regexp {^\d+$} $cookie_value]} { set cookie_value -1 } elseif {$cookie_value < 0 || $cookie_value > 99} { set cookie_value -1 } } if {$cookie_value == -1} { set cookie_value [expr {int(rand()*100)}] HTTP::cookie insert name $static::cookie_name value $cookie_value } if {$cookie_value < $static::threshold} { HTTP::redirect "; } }
Leonardo_SouzaCirrocumulus
Why are using this code "set cookie_value [expr {int(rand()*100)}]" ?
If the cookie does not exist you set it to 1, if exists you increment it. When it reaches 11, you save it as 1. When the cookie value is 1 you redirect.
Soda_Cup_148395You should try posting this with better formatting-
"Preformatted Code Blocks
Indent every line of a code block by at least 4 spaces or 1 tab."
Stanislas_Piro2Cumulonimbus
Hi,
you can try this code (not tested):
when RULE_INIT { set static::cookie_name "abc-stg" ; set static::threshold 10 ; set static_timeout 3600 } when HTTP_REQUEST { if {set value [table incr $static::cookie_name $static_timeout] >= $static::threshold} { table set $static::cookie_name 0 $static_timeout HTTP::redirect "https://abc.co.uk" } }