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From Craig Dunigan <cduni...@doit.wisc.edu>
Subject Re: [users@httpd] Web server corrupting image?
Date Wed, 08 Jun 2005 18:14:34 GMT
I'm guessing that you are using a mod_perl handler to serve these, and it's
going wrong on the second one.  I opened it in vim and got this:

dDate(">=",2003,31,1)^@^Mjkey=00130779^B5^DõA^B^B^B^A^@aØ^^^Døï^QJø^Ge^@^@p<97>~hòd^@^@q<97>~hòd^@^@^L954925515513

$obj->parsedDate(">=",2003,27,1)^@^Mjkey=00004348^B5^DõA^B^B^B^A^@aØ^^^Døð^QJø^Ge^@^@p<97>~hòd^@^@q<97>~hòd^@^@^L954925269341

$obj->parsedDate(">=",2003,32,1)^@^Mjkey=00008843^B5^DõA^B^B^B^A^@aØ^^^DøÙ^UJø^Ge^@^@p<97>~hòd^@^@q<97>~hòd^@^@^L954925516554

$obj->parsedDate(">=",2000,38,1)^@^Mjkey=00003088^B5^DõA^B^B^B^A^@aØ^^^DøÚ^UJø^Ge^@^@p<97>~hòd^@^@q<97>~hòd^@^@^L954925517577

$obj->parsedDate(">=",1999,26,1)^@^Mjkey=00023172^B5^DõA^B^B^B^A^@aØ^^^DøÛ^UJø^Ge^@^@p<97>~hòd^@^@q<97>~hòd^@^@^L954925517584

$obj->parsedDate(">=",2001,21,1)^@^Mjkey=00002881^B5^DõA^B^B^B^C^@d^@Ø^^^DøÜ^UJø^Ge^@^@p<97>~hòd^@^@q<97>~hòd^@^@^O110978978737417

$obj->parsedDate(">=",2000,14,1)^@^Mjkey=00133570^B5^DõA^B^B^B^A^@aØ^^^DøÝ^UJø^Ge^@^@p<97>~hòd^@^@q<97>~hòd^@^@^L

Looks like perl code to me, like maybe you're serving an un-dereferenced code 
ref?

On Wed, 8 Jun 2005, Andres Monroy-Hernandez wrote:

> Hello,
> 
> I have two identical images (gifs). One is displayed correctly, the 
> other one not. I hope you can provide any hints.
> 
> In order to make sure both files are identical I compared their 
> hexadecimal fingerprint by doing:
> 
> % od good.gif > good.hex ; od bad.gif > bad.hex; diff bad.hex good.hex
> 
> I checked the HTTP headers for both images and everything looks fine 
> looks fine: Content-Type and Content-Length are the same.
> The Etag is different, but I believe this is normal.
> 
> The good one:
> ---------------------------
> Response Headers - http://openurl.uquebec.ca:3210/sfxctrl/pix.1.0/good.gif
> Date: Wed, 08 Jun 2005 17:02:08 GMT
> Server: Apache/2.0.52 (Unix) mod_ssl/2.0.52 OpenSSL/0.9.7e DAV/2
> Last-Modified: Sun, 13 Jun 2004 08:44:09 GMT
> Etag: "1540fa-2a8-f9d9e840"
> Accept-Ranges: bytes
> Content-Length: 680
> Keep-Alive: timeout=15, max=99
> Connection: Keep-Alive
> Content-Type: image/gif
> 
> 200 OK
> ---------------------------
> 
> 
> The bad one:
> ---------------------------
> http://openurl.uquebec.ca:3210/sfxctrl/pix.1.0/bad.gif
> Date: Wed, 08 Jun 2005 17:00:48 GMT
> Server: Apache/2.0.52 (Unix) mod_ssl/2.0.52 OpenSSL/0.9.7e DAV/2
> Last-Modified: Sun, 13 Jun 2004 08:44:09 GMT
> Etag: "154056-2a8-f9d9e840"
> Accept-Ranges: bytes
> Content-Length: 680
> Keep-Alive: timeout=15, max=100
> Connection: Keep-Alive
> Content-Type: image/gif
> 
> 200 OK
> 
> ---------------------------
> 
> 
> Thanks in advance.
> 
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-- 
Craig Dunigan
IS Technical Services Specialist (I don't know what it means, either)
Middleware - Enterprise Info Systems - Department of Info Technology
University of Wisconsin, Madison

opinions expressed are my own, not the University's


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