Using an iRule for a proxy pac file

I've found my problem - maybe someone can explain to me why i'm seeing this...

 

 

I had two rules applied to the vip - both very similar. This is because we have two reasonably large and reasonably different PAC files. So to keep them separate i created a rule for each PAC file.

 

 

Apart from defining the PAC file differently in each, the other difference was the http_request block. I did this so if anyone requested something other than the PAC file URL they would get a nice 404.

 

 

The first rule applied to the vip just had the above http_request block, but the second one had this:

 

 

when HTTP_REQUEST {

 

if {[HTTP::uri] starts_with "/proxy/pacfile2.pac"} {

 

HTTP::respond 200 content $static::pacfile "Content-Type" "application/x-ns-proxy-autoconfig" "pragma" "no-cache"

 

} else {

 

HTTP::respond 404 content {These are not the pages you are looking for...}

 

}

 

}

 

 

I changed this to:

 

when HTTP_REQUEST {

 

if {[HTTP::uri] starts_with "/proxy/pacfile2.pac"} {

 

HTTP::respond 200 content $static::pacfile "Content-Type" "application/x-ns-proxy-autoconfig" "pragma" "no-cache"

 

}

 

HTTP::respond 404 content {These are not the pages you are looking for...}

 

}

 

 

Same result. But as soon as i comment out the 404 line like so:

 

 

when HTTP_REQUEST {

 

if {[HTTP::uri] starts_with "/proxy/pacfile2.pac"} {

 

HTTP::respond 200 content $static::pacfile "Content-Type" "application/x-ns-proxy-autoconfig" "pragma" "no-cache"

 

}

 

HTTP::respond 404 content {These are not the pages you are looking for...}

 

}

 

 

Both PAC files are served up in their entirety. What is the 404 line doing that is breaking the rule from sending the whole PAC file?

 

 

Cheers,

 

 

Scotty