Forum Discussion

Thomasvr's avatar
Thomasvr
Icon for Nimbostratus rankNimbostratus
Jun 24, 2019

Irule modify host, uri on response

Hello,   The scenario is that we have url that needs to be translated to another url. So this needs to be done at the request. And for the response the url needs to be translated back to its origin...
ASM Advanced WAF
BIG-IP
host
irule
log
request
response
security
uri
Dario_Garrido's avatar
Dario_Garrido
Icon for MVP rankMVP
Jun 27, 2019

Hello Thomasvr

Actually this doesn't make sense.

"Host" is a header which only applies to requests.

#--- REQUEST ---#
GET / HTTP/1.1
User-Agent: curl/7.26.0
Host: google.com
Accept: */*

The most similar header in the response is "Location" which indicates the URL for redirection.

#--- RESPONSE ---#
HTTP/1.1 301 Moved Permanently
Location: http://www.google.com/
Content-Type: text/html; charset=UTF-8
Date: Thu, 27 Jun 2019 00:40:48 GMT
Expires: Sat, 27 Jul 2019 00:40:48 GMT
Cache-Control: public, max-age=2592000
Server: gws
Content-Length: 219
X-XSS-Protection: 0
X-Frame-Options: SAMEORIGIN

You can replace it using next iRule

when HTTP_RESPONSE {
  if { [HTTP::is_redirect] }{
    HTTP::header replace Location "https://www.google.uk"
  }
}

KR,

Dario.