Re: [Rabbit-proxy-users] no image compression

[Robert O. <ro...@kh...>]

Holger Krull wrote:

> i found that while using rabbit on some sites the images don't get 
> recompressed.

That is normal. Small images should not get compressed, since the 
download time
gain will be lost in latency (caused by rabbit converting the image).
Also rabbit inspects the http headers and checks the mime type. If the 
server
is badly configured or the cgi/jsp/servlet/asp/whatever is evil it will 
send a
mime type that rabbit does not understand.

> For every such image an entry in the error_log shows up.
> [14/Dez/2004:22:03:06 GMT][MSG][unable to parse expire date: 'Thu, 14 
> Dec 2006 22:03:06 GMT' for URI: 
> 'http://images.gmx.net/images/bs/21000/skyscraper_wechsler_v2.gif']

Hmmm, looks odd. Not sure exactly why that fails, I will have to test it.
That is only a warning, it should not affect other image conversion.
It might affect cache length though...

> Is the compression problem related to the expire parsing problem?

No.

> I'm using java version "1.4.2_05"

Do you have imagemagick installed and can rabbit find convert?

Ok, doing a HEAD on the above image I get a response:

200 OK
Cache-Control: max-age=63072000
Connection: close
Date: Tue, 14 Dec 2004 23:06:48 GMT
Accept-Ranges: bytes
ETag: "223954-63c0-41b06ef7"
Server: Apache
Content-Length: 25536
Content-Type: image/gif
Expires: Thu, 14 Dec 2006 23:06:48 GMT
Last-Modified: Fri, 03 Dec 2004 13:49:43 GMT
Client-Date: Tue, 14 Dec 2004 23:06:49 GMT
Client-Peer: 213.165.64.210:80
Client-Response-Num: 1

Hmmm, not sure why rabbit does not convert that...
Do you get anything in the error log?
Does the image get larger after conversion?
in that case rabbit will send the original...

/robo