php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #18095 browser cant read zlib compressed output
Submitted: 2002-07-01 15:16 UTC Modified: 2002-07-11 02:50 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: bugzilla at cm51-210 dot liwest dot at Assigned:
Status: Closed Package: Zlib related
PHP Version: 4.0CVS-2002-07-01 OS: Linux 2.4.18
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: bugzilla at cm51-210 dot liwest dot at
New email:
PHP Version: OS:

 

 [2002-07-01 15:16 UTC] bugzilla at cm51-210 dot liwest dot at 
if i compile with --with-zlib,
output is zlib compressed (can check if i download page and gunzip) but browser displays binary output. (maybe content-type is wrong ?)

zlib.output_compression is set to OFF (doesnt help)

if i set zlib.output_compression_level = 0

output is readable, but prefixed with binary data

?4(??<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

you can check by yourself:

http://cm51-210.liwest.at/wiki/index.php?pagename=LinzCam

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2002-07-01 15:20 UTC] bugzilla at cm51-210 dot liwest dot at 
i think the compressed data is the gzlib "dont compress, store only" header.

browser is mozilla 1.1 cvs
doesnt work with ie 6.0 either
 [2002-07-01 16:33 UTC] sr@php.net 
If you use 0 as zlib.ouput_compression_level, the output isn't compressed, but the gzip/deflate headers are added to the output (and the corresponding Content-Encoding header).

Can you check with a phpinfo()-page that zlib.output_compression really is set to "off" (otherwise try setting it to "0")?

I can't reproduce the binary display with your example URL, it works with Mozilla 1.0 and lynx, if I make the HTTP by hand, it displays the correct headers.
 [2002-07-02 04:24 UTC] bugzilla at cm51-210 dot liwest dot at 
zlib.output_compression Off
zlib.output_compression_level 0
(http://cm51-210.liwest.at/info/) -> faulty gzheader is generated


setting output compression to "0" & restarting -> 

in phpinfo, output compression stays "off", 
gzheader is generated again :-(

i dont think that the correct content encoding header is generated ... trying to test that via netcat
 [2002-07-02 05:20 UTC] bugzilla at cm51-210 dot liwest dot at 
did a little debugging with socat:

request:

> GET /wiki/index.php?pagename=RecentChanges HTTP/1.1\r
> Host: cm51-210.liwest.at:91\r
> User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.1a+) Gecko/20020624\r
> Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,video/x-mng,image/png,image/jpeg,image/gif;q=0.2,text
/css,*/*;q=0.1\r
> Accept-Language: en-us, en;q=0.50\r
> Accept-Encoding: gzip, deflate, compress;q=0.9\r
> Accept-Charset: ISO-8859-1, utf-8;q=0.66, *;q=0.66\r
> Keep-Alive: 300\r
> Connection: keep-alive\r

response:

< HTTP/1.1 200 OK\r
< Date: Tue, 02 Jul 2002 11:13:10 GMT\r
< Server: Apache/2.0.40-dev (Unix) mod_ssl/2.0.40-dev OpenSSL/0.9.6b PHP/4.3.0-dev\r
< Accept-Ranges: bytes\r
< X-Powered-By: PHP/4.3.0-dev\r
< Set-Cookie: PHPSESSID=974cec260ca6ac776ff114bf0a1e2f08; path=/\r
< Set-Cookie: WIKI_PREFS2=O%3A15%3A%22userpreferences%22%3A1%3A%7Bs%3A6%3A%22_prefs%22%3Ba%3A0%3A%7B%7D%7D; expires=Wed, 02-Jul-03 11:13:10 GMT
; path=/\r
< Last-Modified: Sat, 29 Jun 2002 10:19:44 +0000\r
< Transfer-Encoding: chunked\r
< Content-Type: text/html; charset=iso-8859-1\r
< \r
< 3661\r
< ..\b........@6..<?xml version="1.0" encoding="iso-8859-1"?>
< <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
< <html xmlns="http://www.w3.org/1999/xhtml">
< <head>

for other pages i get

< HTTP/1.1 200 OK\r
< Date: Tue, 02 Jul 2002 11:16:39 GMT\r
< Server: Apache/2.0.40-dev (Unix) mod_ssl/2.0.40-dev OpenSSL/0.9.6b PHP/4.3.0-dev\r
< Accept-Ranges: bytes\r
< X-Powered-By: PHP/4.3.0-dev\r
< Set-Cookie: WIKI_PREFS2=O%3A15%3A%22userpreferences%22%3A1%3A%7Bs%3A6%3A%22_prefs%22%3Ba%3A0%3A%7B%7D%7D; expires=Wed, 02-Jul-03 11:16:39 GMT
; path=/\r
< Content-Encoding: gzip\r
< Vary: Accept-Encoding\r
< Content-Length: 12914\r
< Content-Type: text/html; charset=iso-8859-1\r
< \r
< ..\b........Q2..<?xml version="1.0" encoding="iso-8859-1"?>
< <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
< <html xmlns="http://www.w3.org/1999/xhtml">
< <head>


Transfer-Encoding / Content-Encoding ????
 [2002-07-02 05:24 UTC] bugzilla at cm51-210 dot liwest dot at 
looks like 

Content-Encoding: gzip

is missing for some pages (?)
 [2002-07-02 13:43 UTC] sr@php.net 
It seems that there are two issues:

1.) Why isn't zlib.output_compression = Off active?
How do you set this? Via Apache-Config or php.ini? ini_set doesn't work for this option, please try setting it in php.ini, maybe there are some things wrong with the Apache2 config handling.

2.) Why does the Content-Encoding-Header vanish if chunked transfer encoding is used by Apache? Maybe this is an Apache 2 issue, too. Is it possible that you try this with Apache 1.3.26 so that we can localize this bug (if it's an Apache 2 thing or a general zlib bug)?

Thank you!
 [2002-07-11 02:50 UTC] bugzilla at cm51-210 dot liwest dot at 
found out that this is a phpWiki bug. they do something 
like: 
 
        if (function_exists('ob_gzhandler')) { 
            ob_start('ob_gzhandler'); 
            $this->_is_compressing_output = true; 
        } 
 
which is imho really bad :-) 
 
thanks anyway for helping me finding the bug.
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved. 		Last updated: Sun Oct 27 16:01:27 2024 UTC