rewrite body of web-site

[root@ve10:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      stream {}
      tcp {}
   }
}
[root@ve10:Active] config  b pool foo list
pool foo {
   members 200.200.200.101:80 {}
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   STREAM::disable
   HTTP::header remove "Accept-Encoding"
}
when HTTP_RESPONSE {
   if {[HTTP::header value Content-Type] contains "text"}{
      STREAM::expression {@http://www.test.com@https://www.test.com@}
      STREAM::enable
   }
}
}

 response from server

[root@ve10:Active] config  curl http://200.200.200.101/test.html
start of content
hello world
url is http://www.test.com/something
another url is http://www.googe.com/
end of content

 response from bigip
 
[root@ve10:Active] config  curl http://172.28.19.79/test.html
start of content
hello world
url is https://www.test.com/something
another url is http://www.googe.com/
end of content