Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

yo-digitales's avatar
yo-digitales
Icon for Nimbostratus rankNimbostratus
Sep 26, 2019

irule + regex

Hi All,   New to F5 and irules in general.   We have a situation where we need to grab a portion of the HTTP Post that come into the BIGIP, Look for string, and send a manipulated HTTP Post t...
application delivery
irule
irules
regex
Enes_Afsin_Al's avatar
Enes_Afsin_Al
Icon for MVP rankMVP
Sep 26, 2019

Hi yo-digitales,

I hope these codes will help you.

when HTTP_REQUEST {
	log local0. "old-host = [HTTP::host]"
	log local0. "old-path = [HTTP::path]"
	
	set pathfirstdir [getfield [HTTP::path] "/" 2]
	log local0. "path-first-dir = $pathfirstdir"
	
	set newpath [string map -nocase [list /$pathfirstdir ""] [HTTP::path]]
	log local0. "new-path = $newpath"
	
	set newhost "$pathfirstdir.[HTTP::host]"
	log local0. "new-host = $newhost"
	
	set newaddress "https://$newhost$newpath"
	log local0. "new-address = $newaddress"
}