Insert JavaScript If URL path contains word

If the connection is being reset, are you seeing any error messages associated with iRule run-time errors in /var/log/ltm?

thanks for the reponse. I get an 'cannot read" uri error in the logs when the irule is enabled;

TCL error: /Common/im_token_insert_v1 - can't read "uri": no such variable while executing "switch -glob $uri { ".ashx" - ".asmx" - ".axd" - ".js" { set insertJscript 0 } default { if { [HTTP::p..."

You named the variable "sitepath" in the HTTP_REQUEST event but are referring to it as "uri" ion the SWITCH statement. Either change "sitepath" to "uri" or "uri" to "sitepath" throughout.

so i changed the HTTP_REQUEST varible to 'uri' but im getting the same error. here is what the code looks like now;

when HTTP_REQUEST { 
     Disable the stream filter by default 
    STREAM::disable 
    if {[string tolower [HTTP::uri]] contains "anakin" }  {
        set uri [string tolower [HTTP::uri]]

}
}

when HTTP_RESPONSE { 
    if { [HTTP::status] == 200 } {
        if {[HTTP::header value Content-Type] contains "text"} { 
            set stream_find ""
            set stream_find_lower ""
            set stream_repl ""
            set insertJscript 1

             Do not allow the Javascript insertion if the pages end with the following
            switch -glob $uri { 
                "*.ashx*" - 
                "*.asmx*" - 
                "*.axd*" - 
                "*.js*" { 
                    set insertJscript 0 
                }
                default {
                    if { [HTTP::payload] contains "META HTTP-EQUIV=\"Refresh\""} { 
                        set insertJscript 0 
                    }
                }
            }

            if {$insertJscript == 1} { 
                append stream_repl $static::jscript
                append stream_expression "@$stream_find@$stream_repl$stream_find@" 
                append stream_expression "@$stream_find_lower@$stream_repl$stream_find_lower@" 

                STREAM::expression $stream_expression 
                STREAM::enable 
            }
        }
    }

}

i figured out my issues. i needed to add a statement to not insert the script if the url path isnt there. here is what i did if anyone is interested

when RULE_INIT {
     Insert  Token Javascript
    set static::jscript {
        
    }
}   

when HTTP_REQUEST { 
   This is the condition for which requests will be matched against 
  if {[HTTP::uri] contains "/Anakin"} { 
   set enableEum 1 
   } 
   else { 
   set enableEum 0 
   } 

   Disable the stream filter for client requests as we are only interested in the server response 
  STREAM::disable 
  set uri [string tolower [HTTP::uri]] 
 } 



when HTTP_RESPONSE { 
    if {($enableEum == 1) } {
        if { [HTTP::status] == 200 } {
            if {[HTTP::header value Content-Type] contains "text"} { 
                set stream_find ""
                set stream_find_lower ""
                set stream_repl ""
                set insertJscript 1

                 Do not allow the Javascript insertion if the pages end with the following
                switch -glob $uri { 
                    "*.ashx*" - 
                    "*.asmx*" - 
                    "*.axd*" - 
                    "*.js*" { 
                        set insertJscript 0 
                    }
                    default {
                        if { [HTTP::payload] contains "META HTTP-EQUIV=\"Refresh\""} { 
                            set insertJscript 0 
                        }
                    }
                }

                if {$insertJscript == 1} { 
                    append stream_repl $static::jscript
                    append stream_expression "@$stream_find@$stream_repl$stream_find@" 
                    append stream_expression "@$stream_find_lower@$stream_repl$stream_find_lower@" 

                    STREAM::expression $stream_expression 
                    STREAM::enable 
                }
            }
        }
    }
}

You are conditionally setting the variable named "uri" only if the string "anakin" is present in the HTTP URI. If "anakin" is NOT in the URI, the HTTP_RESPONSE code still executes but there is no "uri" variable. You will have to include some sort of code that instructs the system what to do if "anakin" is not in the URI.

i figured it out. i posted the rule above. thanks for the help

you can try this code:

In your code, you don't server side http compression. and the stream expression variable is created on every response instead of create it only when the irule is loaded.

when RULE_INIT {
     Insert  Token Javascript
    set jscript {}
     Create the stream expression list and insert in this list all rewrite expressions.
    set static::stream_expression [list]
    lappend static::stream_expression "@@$jscript@"
    lappend static::stream_expression "@@$jscript@"
     create the extension list to not rewrite
    set static::no_rewrite_ext [list ashx asmx axd js]
}   

when HTTP_REQUEST { 
  Check if the word is included in URI and if request extension support javascript insertion.
    if {[HTTP::uri] contains "/Anakin" && [lsearch $static::no_rewrite_ext [getfield [URI::basename [HTTP::uri]] "." 2]] == -1 } { 
        set insertJscript 1
        HTTP::header remove "Accept-Encoding"
    } else { 
        set insertJscript 0 
    }
   Disable the stream filter for client requests as we are only interested in the server response 
    STREAM::disable 
} 

when HTTP_RESPONSE { 
    if {$insertJscript && [HTTP::status] == 200 && [HTTP::header value Content-Type] contains "text" && !([HTTP::payload] contains "META HTTP-EQUIV=\"Refresh\"")} { 
        STREAM::expression $static::stream_expression 
        STREAM::enable
    }
}