Forum Discussion
zongfeng_101672
Nimbostratus
Nimbostratus[HTTP::uri] rewrite fail,help please ,thanks
my f5 has two pool, one pool name is test1, vip is 192.168.1.5 port 80; other pool name is test2,vip is 192.168.1.6 port 80
when user visit http://192.168.1.5/admin,I wish f5 dispatch this request to http://192.168.1.6/manager
i use iRule to control,but it's fail to redirect to other pool !
follow is my iRule:
when HTTP_REQUEST
{
log local0. "http uri before modified: [HTTP::uri]"
switch -glob [HTTP::uri] {
"/admin*" {
set uri value to a temporary variable
set tempuri [HTTP::uri]
log local0. "temprui before replace is $tempuri"
replace "/admin" to "/manager"
set tempuri [string replace $tempuri 0 5 "/manager"]
log local0. "tempuri after replace is $tempuri"
HTTP::uri $tempuri
log local0. "http uri after modified: [HTTP::uri]"
pool test2 }
default { pool test1}
}
}
follow is f5 log:
Thu Mar 29 15:24:03 CST 2012 info local/tmm tmm[3466] Rule adc : temprui before rewrite is /admin
Thu Mar 29 15:24:03 CST 2012 info local/tmm tmm[3466] Rule adc : tempuri after rewrite is /manager
Thu Mar 29 15:24:03 CST 2012 info local/tmm tmm[3466] Rule adc : after replace uri is /admin
3 Replies
hoolioCirrostratus
Hi Zongfeng,
Up until 11.0, the values for HTTP::path, HTTP::uri and other commands are cached within the same iRule event priority even if you modify them. The values are still changed for the request though. So what you're seeing is expected even though the URI has been updated. You can verify this by logging the values in a later HTTP_REQUEST event using priority:when HTTP_REQUEST priority 501 { log local0. "Updated URI in 501: [HTTP::uri]" }
Here is a list of at least some of the HTTP:: commands which are cached:
HTTP::password
HTTP::username
HTTP::host
HTTP::path
HTTP::query
HTTP::request_num
HTTP::status
HTTP::uri
HTTP::is_keepalive
HTTP::is_redirect
HTTP::request
Again this was fixed in 11.0 so the return values are updated when they're changed.
Aaron
zongfeng_101672hi , hoolio
thanks for replay!
the script in version 10 verification through, but in the version 9 can't redirect to pool test2, what is the problem? thanks!- nitass
Employee
have you done what Aaron suggested? what is the result in v9? you may add more log command.
e.g.[root@ve1023:Active] config b virtual bar list virtual bar { snat automap destination 172.28.19.79:80 ip protocol 6 rules myrule profiles { http {} tcp {} } } [root@ve1023:Active] config b rule myrule list rule myrule { when HTTP_REQUEST { set orguri [HTTP::uri] log local0. "http uri before modified: $orguri" switch -glob [HTTP::uri] { "/admin*" { set tempuri [HTTP::uri] log local0. "temprui before replace is $tempuri" set tempuri [string replace $tempuri 0 5 "/manager"] log local0. "tempuri after replace is $tempuri" HTTP::uri $tempuri pool test2 } default { pool test1 } } } when HTTP_REQUEST priority 501 { set newuri [HTTP::uri] log local0. "Updated URI in 501: $newuri" } when SERVER_CONNECTED { log local0. "[IP::client_addr]:[TCP::client_port]|[IP::local_addr clientside]:[TCP::local_port clientside]|$orguri|[LB::server pool]|[IP::remote_addr]:[TCP::remote_port]|$newuri" } } [root@ve1023:Active] config b pool test2 list pool test2 { members 200.200.200.102:80 {} } [root@ve1023:Active] config cat /var/log/ltm Apr 5 21:54:49 local/tmm info tmm[4797]: Rule myrule : http uri before modified: /admin123 Apr 5 21:54:49 local/tmm info tmm[4797]: Rule myrule : temprui before replace is /admin123 Apr 5 21:54:49 local/tmm info tmm[4797]: Rule myrule : tempuri after replace is /manager123 Apr 5 21:54:49 local/tmm info tmm[4797]: Rule myrule : Updated URI in 501: /manager123 Apr 5 21:54:49 local/tmm info tmm[4797]: Rule myrule : 172.28.19.80:33410|172.28.19.79:80|/admin123|test2|200.200.200.102:80|/manager123
