DEFLATE after Substitute on Apache Proxy Server

Thibaut Lemaire <tib1avivo@xxxxxxxxx> · Tue, 18 Dec 2012 17:48:22 +0100

Hi all,

I've got a problem in configuring Proxy on Apache :
I want to :
1/ get a content from a website (Deflate or not) ;
2/ apply a filter on it to substitute some text on the body of the page ;

3/ resend the page to the client after apply the Deflate filter to the 

altered page.

My configuration is like this :

ExtFilterDefine FAnalyse mode=output intype=text/html 

cmd="path_to_my_script"

<VirtualHost *:80>
ServerName site1.com
<Location />
SetOutputFilter INFLATE;FAnalyse;DEFLATE
ProxyPass http://site2.com/
Header append Vary User-Agent env=!dont-vary
</Location>
</VirtualHost>

It works fine without the DEFLATE filter but the content is not compressed.

With the DEFLATE filter, the client seems to get the compressed content 

but with bad headers because displays a page like this :

‹í39 Èæ*ô2ÃA(„ºÒªíïÄÃ5¹Q°sç¿^Þ^N.ç7Æðj#?
æÈ>ñ<ÙæýåÕßÑÍù{°D?]ßÎ~ ty&,é”“qÏ:<¬Ð™àYR
lŒŒÓ@ÀË¾íQÿqâõ¬ |ë6%^ç($aÅ ‚˜¸¬„ŠGàûqEyð

My script is not the problem because I substitute it by a Substitute 

Filter from Apache and the problem is the same.

I tried this directive :

Header append Vary User-Agent env=!dont-vary

without success.

Any idea or advice ?

Thanks by advance :)

Thibaut

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