irule for URL remap

This is the right format of the URL remap

Client -----> BIGIP --- *

BIGIP ----> Backend server --- *

Maps any of the following requests

https://my.server.com/everything?is=awesome
https://MY.SERVER.COM/everything?is=awesome
https://my.server.com:9000/everything?is=awesome 

to backend request

/my.server.com/everything?is=awesome

iRule as follows

when HTTP_REQUEST {
  HTTP::uri "/[string tolower [getfield [HTTP::host] {:} 1]][HTTP::uri]"
}

Below is the better explanation of the question

Hi All,

I have a situation where I need some help with an Irule , the scenario is when a client access a VIP with the URL " Client -----> BIGIP --- * , it needs to be remapped to

BIGIP ----> Backend server --- *

Note: ( name1,name2,name3 components can dynamically change depending on the data resources that needs to be accessed on backend server )

Your load balancing will select the pool member so is not used to select the actual server. We can change the URI and Host header on the way to the pool and thats it.

when HTTP_REQUEST {
   foreach {ignore name2 name34 rest} [split [HTTP::uri] {/}] break
   HTTP::host "$name34.[getfield [HTTP::host] {:} 1]"
   HTTP::uri "/$name2/$rest"
}

Thank you kevin for the response, is the below irule will do the URI rewrite , if the browser/client hits the F5 vip with http://name.domain.com/abc/ten/spa and the backend server should receive with uri rewrite as http://spa.ten.name.domain.com/abc

On the LTM by doing a curl command it shows that uri rewrite happens , but when we checked HTTP_RESPONSE log and the backend server log, it receives the request as it is ( http://name.domain.com/abc/ten/spa )

did I miss something in the irule ? please advise

when HTTP_REQUEST {

set vip [IP::local_addr]:[TCP::local_port]
set url [HTTP::header Host][HTTP::uri] 
set URI [string tolower [HTTP::uri]]
 if {[HTTP::uri] contains "/abc/"} {
  scan $URI {/%[^/]/%[^/]/%[^/]/} a b c
  log local0. $b
  log local0. $c
  **HTTP::uri "http://$c.$b.name.domain.com/abc/"**
  log local0. [HTTP::uri] }
else{             
  scan $URI {/%[^/]/%[^/]/} a b 
  log local0. $a
  log local0. $b
  HTTP::uri "http://$b.$a.name.domain.com/"
  log local0. [HTTP::uri]
} 

}

when HTTP_RESPONSE {

set client [IP::client_addr]:[TCP::client_port]

set node [IP::server_addr]:[TCP::server_port]

set nodeResp [HTTP::status]

log local0.info "Client: $client -> VIP:$vip$url -> Node: $node with response $nodeResp"

}

Hi,

did you tried rewrite profile?

• rewrite mode : URI translation
• rule 1 :
  • direction : both
  • client URI : http://name.domain.com/abc/ten/spa/
  • server URI : http://spa.ten.name.domain.com/abc/