Payload change if request is from specific IP/IP range

Hi Habib Ulla Khan,

you may take a look to the iRule below. It uses a slightly optimized HTTP::collect syntax with some added notes and also the requested filtering of specific client IP addresses by setting a

$replace_content

variable during

CLIENT_ACCEPTED

event.

when CLIENT_ACCEPTED {
    if { [IP::addr [IP::client_addr] equals "10.10.10.0/24"] } then {
        set replace_content 1
    } else {
        set replace_content 0
    }
}
when HTTP_REQUEST { 
    if { $replace_content } then {

         Note: Its recommended use a HTTP-Compression profile instead of 
               the HTTP::header remove "Accept-Encoding" command below. 
               Using a HTTP-Compression profile allows you to remove 
               the Accept-Encoding header on the server side (required  
               for content replacements) without losing the ability to 
               compress the content on the client side.

        HTTP::header remove "Accept-Encoding" 

        switch -exact -- [string tolower [HTTP::host]] { 
            "123.domain.com" { 
                pool 123-pool-tcp443 
            } 
            "456.domain.com" { 
                pool 456-pool-tcp443 
            } 
        }   
    }
} 
when HTTP_RESPONSE {
    if { ( $replace_content )
     and ( [HTTP::header Content-Type] contains "text/xml" )
     and ( [HTTP::header "Content-Length"] > 0 ) } then {

         Note: Triggering a HTTP::collect "lenght" larger then the total 
               payload length will stall your connection. So just check an 
               upper limit of e.g. 1Mbyte and enforce that limit if the 
               Content-Length exceeds the limit.

        if { [HTTP::header "Content-Length"] <= 1048576} then {
            HTTP::collect [HTTP::header "Content-Length"]
        } else {
            HTTP::collect 1048576
        }
    }
} 
when HTTP_RESPONSE_DATA {
    if { $replace_content } then {
        HTTP::payload replace 0 [HTTP::payload length] [string map {"InstallApplication" " "} [HTTP::payload]] 
        HTTP::release 
    }
}

Cheers, Kai