Problem with Proxy Pass iRule

I was playing with the ProxyPass rule initially because of the debug capabilities. A stripped down rule to perform what I am attempting is below. I am trying to modify the hostnames in URLs.

 

 

 

when HTTP_RESPONSE {

 

 

if { [HTTP::header exists "Accept-Encoding"] } {

 

HTTP::header remove "Accept-Encoding"

 

log local0. "$log_prefix: Removed Accept-Encoding header"

 

Disable the stream filter by default

 

STREAM::disable

 

 

Check if response type is text

 

if {[HTTP::header value Content-Type] contains "text"}{

 

 

Match any http:// instance and replace it with nothing

 

STREAM::expression {@URL=http://qj1cen00.na..net:8020/@URL=http://testvip..net:8020/@}

 

 

Enable the stream filter for this response only

 

STREAM::enable

 

}

 

}

 

}

 

}

 

when STREAM_MATCHED {

 

log local0. "Stream matched [STREAM::match]"

 

}