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Salvatore_Berti's avatar
Salvatore_Berti
Icon for Nimbostratus rankNimbostratus
Nov 15, 2007

how disable compression for a specific javascript?

Hi guys,

 

 

I've got a page with 3 js files

 

 

 

 

 

 

 

 

 

 

and I've been trying to disable compression for one of them using the irule below:

 

 

rule salvo_selective_compress_disable {

 

when HTTP_REQUEST {

 

if { ([HTTP::host] eq "1.1.1.1") and

 

([HTTP::uri] eq "/salvo/1.js") } {

 

log local0. "compression_rule"

 

COMPRESS::disable }

 

}

 

}

 

 

I can see the entry in the log but the js is still compressed, however if I use an http profile with selective compression and use the irule below I can see that only the file specified in the irule is compressed and no the other 2 (that is actually what I expect)

 

 

rule salvo_selective_compress_enable {

 

when HTTP_REQUEST {

 

if { ([HTTP::host] eq "1.1.1.1") and

 

([HTTP::uri] eq "/salvo/1.js") } {

 

log local0. "compression_rule"

 

COMPRESS::enable }

 

}

 

}

 

 

I don't get where the difference is, can anyone help me to figure out what is going on or give me an hint?

 

 

 

Thanks in advance.

 

 

Waol
application delivery
dev
devops
iRules

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  • Joe_Wojcik's avatar
    Joe_Wojcik
    Icon for Employee rankEmployee
    Nov 19, 2007
    The COMPRESS::disable in the first rule won't work without the selective compression profile, which is why you're seeing all of the files compressed. It's listed as only working with that profile selected on the wiki

    http://devcentral.f5.com/wiki/default.aspx/iRules/COMPRESS__disable.html

    So I would think that the best bet would be to try and use selective compression and enabling compression for everything except the particular file you don't want compressed.

    I would maybe try something like this

    
rule salvo_selective_compress_enable {
   when HTTP_REQUEST {
        if { ([HTTP::host] eq "1.1.1.1") and ([HTTP::uri] eq "/salvo/1.js") } {
            log local0. "compression_rule_disable"
            COMPRESS::disable 
        }
        else {
            COMPRESS::enable
        }
   }
}