HTTP::is_redirect error?

I added priority to my iRule, causing it to run first, and the errors seem to have disappeared. Wonder what was happening in the other iRules that was breaking this? Any ideas?

 

 

The current iRule is:

 

 

when HTTP_REQUEST priority 100 {

 

Save the host

 

set host [string tolower [HTTP::host]]

 

}

 

when HTTP_RESPONSE priority 100 {

 

if {[HTTP::is_redirect]} {

 

set location [string tolower [HTTP::header "Location"]]

 

if { ($location starts_with "http://") and ($location contains $host)} {

 

HTTP::header replace Location [string map -nocase { "http://" "https://" } [HTTP::header value Location]]

 

}

 

}

 

}