Use IRULE to change Response Chunking

[jhanrahan_43314]

Can I use and Irule to change the Response Chunking depending on the source IP address. If so can you please send me an example

[JRahm]

Support for changing profile parameters in iRules is not there yet.

[Deb_Allen_18]

You could try using the trick we use for HTTP collection mechanics where you force the connection to HTTP/1.0 (RFC2616 prohibits servers from responding to 1.0 requests w/chunked encoding):

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" 
    } 
 }

Just add a Data Group list of type Address that includes the IP addresses & networks for which chunking is not desired, and modify the above code snip to add a source IP test against the address class:

when HTTP_REQUEST { 
    if {[matchclass [IP::client_addr] equals $::NoChunkIPs]}{ 
        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" 
       } 
    } 
 }

hth /d

[Deb_Allen_18]

hate to do the matchclass for each request is all... this s/b more efficient & does the same thing:

   
 when CLIENT_ACCEPTED {   
    set chunk 1   
    if {[matchclass [IP::client_addr] equals $::NoChunkIPs]}{    
       set chunk 0   
    }   
 }   
 when HTTP_REQUEST {    
    if { $chunk == 0 }{    
        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"    
       }    
    }    
 }

/d

[Jason_Adams]

^ Expanding the above iRule as it was clobbered during one of our platform migrations

when CLIENT_ACCEPTED priority 500 {
    set chunk 1
    if {[class match -- [IP::client_addr] equals "/Common/NoChunkIPs"]} {
        set chunk 0
    }
}
when HTTP_REQUEST priority 500 {
    if {$chunk == 0} {
        # 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"
        }
    }
}