Google Analytics Injection iRules for Multiple Virtual Servers

 
 when RULE_INIT { 
 set txt_texttoinsert " 
  
  
 " 
 } 
 when HTTP_REQUEST { 
  Don't allow data to be chunked 
 if { [HTTP::version] eq "1.1" } { 
 if { [HTTP::header is_keepalive] } { 
 HTTP::header replace "Connection" "Keep-Alive" 
 } 
 HTTP::version "1.0" 
 } 
 } 
 when HTTP_RESPONSE { 
 if { [HTTP::header Content-Type] starts_with "text/html" } { 
 if { [HTTP::header exists "Content-Length"] } { 
 set content_length [HTTP::header "Content-Length"] 
 } else { 
 set content_length 1000000 
 } 
 if { $content_length > 0 } { 
 HTTP::collect $content_length 
 } 
 } 
 } 
 when HTTP_RESPONSE_DATA { 
 set idx [string last "" [HTTP::payload]] 
 if { -1 == $idx } { 
 set idx [string last "" [HTTP::payload]] 
 } 
 if { -1 == $idx } { 
 set offset [HTTP::payload length] 
 } else { 
 set offset $idx 
 } 
 HTTP::payload replace $offset 0 $::txt_texttoinsert 
 }