insert javascript to html pages using irules

Hi, I have some concern regarding connection which enter the BIG-IP and trigger the irule

 

 

I'm using variable for the url and in response event will check the url and insert javascript.

 

The problem is when more than one connection occurs at the same time. How the variable will be set?

 

I know there will be time difference even only 0.0001 or so but in this case what if both connection enter virtual server at the same time. Does it will effect the variable set or not?

 

 

i modified the irule into this

 

 

when HTTP_REQUEST {

 

set ::url [HTTP::host][HTTP::uri]

 

}

 

 

when HTTP_RESPONSE {

 

if { $::url equals "192.168.0.202/index.jsp" } {

 

STREAM::expression "change page content here";

 

STREAM::enable;

 

}

 

}

 

 

when STREAM_MATCHED {

 

STREAM::disable

 

}

 

 

or is there any other way to check the url in response without using variables?

 

 

 

 

thanks