Forum Discussion
eLeCtRoN
Cirrus
CirrusF5 iRule for Header insert
Hello, I create that iRule below, but my header value for the header x-id is still empty, what could be wrong ? when HTTP_REQUEST { foreach header_name [HTTP::header names] { if {([HTTP::header v...
CypherCirrus
Cirrusit seems you want to replace the header value with something else? What do you want to accomplish exactly?
You can try this.
if { [HTTP::header exists x-id] } {
set VALUE [HTTP::header "XXX#YYYY"]
#log command to determine if VALUE is set correctly
log local0. "x-idlog var VALUE=$VALUE"
# header x-d allready exists -> remove it first.
HTTP::header remove x-id
# add header x-id with variable VALUE
HTTP::header insert x-id $VALUE
}
The problem might be the var VALUE is not set correctly, and is thus empty.
eLeCtRoNCirrus
CirrusHello Cypher,
our header x-id is empty per default and the WAF doesen't like that and blocks our request, so I want to set a value
for the header x-id, now I set your iRule active and the header is still empty, in the system log I got just the messages
| HTTP | :header insert x-id $VALUE |
| syslog-ng | log local0. \"x-idlog var VALUE=$VALUE\" |
- Cypher
i would troubleshoot 'bottom-up' and use lowercase for variables (not sure if that has an impact, but it is a good practice).
i don't know what XXX#YYYY is, but it needs to exists as a header, or whatever you use instead of XXX#YYYY. so lets see if it exists first in the logs.
when HTTP_REQUEST {
foreach header_name [HTTP::header names] {
log local0. "$header_name"
}
if { [HTTP::header exists x-id] } {
set value [HTTP::header "XXX#YYYY"]
#log command to determine if VALUE is set correctly
log local0. "x-idlog var value=${value}"
# header x-id allready exists -> remove it first.
HTTP::header remove x-id
# add header x-id with variable value
HTTP::header insert x-id $value
}
}check system > logs > local traffic for errors and logs.