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From "Boyle Owen" <>
Subject RE: [users@httpd] mod_deflate does not work
Date Fri, 10 Nov 2006 07:22:06 GMT
> -----Original Message-----
> From: Shao Liang Jia [] 
> Sent: Thursday, November 09, 2006 11:18 AM
> To:
> Subject: [users@httpd] mod_deflate does not work
> Hi, Everyone:
> I installed apache on Windows XP. mod_deflate is in the 
> "apache_home/modules" directory. 
> When I try to use it, it does not work. Because from the log 
> infomation list below, the output is not 
> compressed. I download the source code of apache and zlib and 
> recompiled mod_deflate. 
> It still does not work.

To add to Joshua's advice about logging, remember that apache will only
gzip the data if the client asks for it. Before the server will zip the
response, the client has to send a request-header like;

	Accept-Encoding: gzip,deflate

Most recent browsers do this by default but if you are using an ancient
browser, or wget or even telnet to hit the server, you won't get
compression unless you ask for it...

If you really want to be sure, use FireFox with the LiveHTTPHeaders
extension. Then you can see exactly what each party is saying to the

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

> This is the .conf file:
> LoadModule deflate_module modules/
> DeflateFilterNote ratio 
> CustomLog logs/deflate_log deflate
> LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" 
> \"%{User-Agent}i\"" combined
> LogFormat "%h %l %u %t \"%r\" %>s %b" common
> LogFormat "%{Referer}i -> %U" referer
> LogFormat %{User-agent}i agent
> LogFormat '"%v %h %l %u %t "%r" %>s %b "%{Referer}i" 
> "%{User-Agent}i"" (%{ratio}n)' deflate 
> CustomLog logs/A_SUSRID6_access_log common
> CustomLog logs/A_SUSRID6_referer_log referer
> CustomLog logs/A_SUSRID6_agent_log agent
> CustomLog logs/deflate_log deflate 
> <Location />
> SetOutputFilter DEFLATE 
> </Location> 
> This is the log file(the original file size is 151806, the 
> compressed file size is still 151806):
> "jiasl - - [09/Nov/2006:17:56:34 +0800] "GET / 
> HTTP/1.1" 200 151806 "-" "Mozilla/4.0 (compatible; MSIE 6.0; 
> Windows NT 5.1; SV1; .NET CLR 1.1.4322)"" (-)
> Thanks.
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