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From "Boyle Owen" <>
Subject RE: [users@httpd] Problem with Mod_Deflate & Virtual Hosts
Date Thu, 18 Jan 2007 07:18:36 GMT
> -----Original Message-----
> From: Graeme Walker [] 
> Sent: Wednesday, January 17, 2007 10:55 PM
> To:
> Subject: [users@httpd] Problem with Mod_Deflate & Virtual Hosts
> Hi,
> I am trying to get mod_deflate working with my virtual hosts, 
> however it does not appear to be doing anything. I am using 
> Apache 2.2.4.

The client has to tell the server that it can accept zipped content. It
does this by sending a request header like:

Accept-Encoding: gzip,deflate

Is your client doing this? Try it on the command-line or get Firefox
with LiveHTTPHeaders to check...

Owen Boyle
Disclaimer: Any disclaimer attached to this message may be ignored. 

> My Config is as follows:
> NameVirtualHost *:80
> Listen 80
> <VirtualHost *:80>
>   ServerName
>   ServerSignature On
>   DocumentRoot "D:/Website_Dev/cImages/cimage"
>   AddOutputFilterByType DEFLATE text/html text/plain text/xml 
> image/jpg image/jpeg image/gif image/png application/xml 
> application/xhtml+xml 
>   DeflateFilterNote Input instream
>     DeflateFilterNote Output outstream
>     DeflateFilterNote Ratio ratio
>     DeflateCompressionLevel 9
>     LogFormat '%t %r %{outstream}n/%{instream}n 
> (%{ratio}n%%)' deflate 
>     CustomLog logs/deflate_main.log deflate
>     LogLevel Debug
> </VirtualHost>
> Within my deflate_main.log is showing no compression.
> The error log from apache is showing:
> [Wed Jan 17 21:48:28 2007] [debug] mod_headers.c(663): 
> headers: ap_headers_output_filter() 
> [Wed Jan 17 21:48:28 2007] [debug] mod_headers.c(663): 
> headers: ap_headers_output_filter()
> [Wed Jan 17 21:48:28 2007] [debug] mod_headers.c(663): 
> headers: ap_headers_output_filter()
> This looks like it is appending the headers, but nothing is 
> happening. I am using FireFox 2.0.
> Any help would be much appreciated.
> Cheers
> Graeme
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