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Forum Discussion

BB16's avatar
BB16
Icon for Nimbostratus rankNimbostratus
Jan 29, 2018

Please explain set uri line below irule & entire irule

co_d10_xyz "/pqrs/xyz/*" { HTTP::header insert X-Forwarded-For [IP::remote_addr] set uri [string map -nocase {"pqrs/xyz" "pqrs"} [HTTP::uri]] HTTP::uri $uri ...
devops
iRules
LTM
Kai_Wilke's avatar
Kai_Wilke
Icon for MVP rankMVP
Jan 29, 2018

Hi bbukane,

to explain your entire iRule you need at least post the entire iRule... 😉

set uri [string map -nocase {"pqrs/xyz" "pqrs"} [HTTP::uri]]                    
HTTP::uri $uri

The iRule snipped above will read the currently requested HTTP::uri (e.g. /pqrs/xyz/file.html) and replace any ocourence of the string "pqrs/xyz" with "pqrs" while ignoring possible upper/lower cases for the search pattern. It will then temporary store the result of the replacement into the variable 

$uri
and then overwrite the currently requested 
HTTP::uri
with the just computed value of 
$uri
before forwarding the request to the backend server.

Incomming Request: 

http://sitename/pqrs/xyz/file1.html

Forwarded Request: 

http://sitename/pqrs/file1.html

Cheers, Kai