Forum Discussion
Michael_Mangret
Nimbostratus
NimbostratusIrule Error message
Can anyone tell me what might be wrong with my Irule? It seems to be working. I get the message Forbidden when I send a call with the header x-moz set, but I still get this error message in my log.
Error Message:
Aug 13 12:59:27 tmm tmm[715]: 01220001:3: TCL error: Rule xmoz_irule - can't read "host_pool": no such variable while executing "if { $host_pool ne "" } { pool $host_pool }"
Irule:
when HTTP_REQUEST {
if {[string tolower [HTTP::header x-moz:] ] contains "prefetch" } {
HTTP::respond 403 content "Forbidden"}
else {set host_pool [findclass [HTTP::host] $::DSHostPoolMap " "] }
if { $host_pool ne "" } {
pool $host_pool }
}
2 Replies
hoolioCirrostratus
You're getting the TCL error because $host_pool isn't being set for every request--but is being referenced in every request.
This is your original rule, formatted for easier reading:when HTTP_REQUEST { if {[string tolower [HTTP::header x-moz:] ] contains "prefetch" } { HTTP::respond 403 content "Forbidden" } else { set host_pool [findclass [HTTP::host] $::DSHostPoolMap " "] } if { $host_pool ne "" } { pool $host_pool } }
Note that on every request, the $host_pool condition is being checked. It's only being set if the x-moz header check is false.
You might want to move the $host_pool check into the else. Or you could check to see that the $host_pool variable is set and not blank using [info exists host_pool].
You should also consider specifying what you want to happen if the [HTTP::host] value is not found in the datagroup.
Here's an example:when HTTP_REQUEST { if {[string tolower [HTTP::header x-moz]] eq "prefetch" } { HTTP::respond 403 content "Forbidden" } else { set host_pool [findclass [string tolower [HTTP::host]] $::DSHostPoolMap " "] if { $host_pool ne "" } { pool $host_pool } else { pool default_pool } } }
Aaron
Michael_MangretThank you very much. I will try to add the defaul pool and see what happens.
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