From:             [EMAIL PROTECTED]
Operating system: n/a
PHP version:      5.2.5
PHP Bug Type:     Streams related
Bug description:  zlib filter is unable to auto-detect gzip/zlib file headers

Description:
------------
according to the zlib documentation for inflateInit2() in zlib.h (online
copy at
http://www.raspberryginger.com/jbailey/minix/html/zlib_8h-source.html):

windowBits can also be greater than 15 for optional gzip decoding. Add
32 to windowBits to enable zlib and gzip decoding with automatic header
detection, or add 16 to decode only the gzip format (the zlib format will
return a Z_DATA_ERROR)

zlib.inflate filter's filterparams only accepts window size of 15, but
should accept up to 15+32 according to these docs.

Reproduce code:
---------------
<?php /* $Id: zlib_filter_inflate.phpt,v 1.1.2.1 2005/11/24 04:37:47
pollita Exp $ */

$a = gzopen(dirname(__FILE__) . '/test.txt.gz', 'w');
fwrite($a, "This is quite the thing ain't it\n");
fclose($a);

$fp = fopen(dirname(__FILE__) . '/test.txt.gz', 'r');
stream_filter_append($fp, 'zlib.inflate', STREAM_FILTER_READ);
echo fread($fp, 2000);
fclose($fp);
echo "1\n";
$fp = fopen(dirname(__FILE__) . '/test.txt.gz', 'r');
// zlib format
$fp = fopen(dirname(__FILE__) . '/test.txt.gz', 'r');
stream_filter_append($fp, 'zlib.inflate', STREAM_FILTER_READ,
array('window' => 15+16));
echo "2\n";
echo fread($fp, 2000);
fclose($fp);
// auto-detect
$fp = fopen(dirname(__FILE__) . '/test.txt.gz', 'r');
stream_filter_append($fp, 'zlib.inflate', STREAM_FILTER_READ,
array('window' => 15+32));
echo "3\n";
echo fread($fp, 2000);
fclose($fp);

?>


Expected result:
----------------
1
2
This is quite the thing ain't it
3
This is quite the thing ain't it

Actual result:
--------------
1
2
3


-- 
Edit bug report at http://bugs.php.net/?id=43793&edit=1
-- 
Try a CVS snapshot (PHP 4.4): 
http://bugs.php.net/fix.php?id=43793&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): 
http://bugs.php.net/fix.php?id=43793&r=trysnapshot52
Try a CVS snapshot (PHP 5.3): 
http://bugs.php.net/fix.php?id=43793&r=trysnapshot53
Try a CVS snapshot (PHP 6.0): 
http://bugs.php.net/fix.php?id=43793&r=trysnapshot60
Fixed in CVS:                 http://bugs.php.net/fix.php?id=43793&r=fixedcvs
Fixed in release:             
http://bugs.php.net/fix.php?id=43793&r=alreadyfixed
Need backtrace:               http://bugs.php.net/fix.php?id=43793&r=needtrace
Need Reproduce Script:        http://bugs.php.net/fix.php?id=43793&r=needscript
Try newer version:            http://bugs.php.net/fix.php?id=43793&r=oldversion
Not developer issue:          http://bugs.php.net/fix.php?id=43793&r=support
Expected behavior:            http://bugs.php.net/fix.php?id=43793&r=notwrong
Not enough info:              
http://bugs.php.net/fix.php?id=43793&r=notenoughinfo
Submitted twice:              
http://bugs.php.net/fix.php?id=43793&r=submittedtwice
register_globals:             http://bugs.php.net/fix.php?id=43793&r=globals
PHP 3 support discontinued:   http://bugs.php.net/fix.php?id=43793&r=php3
Daylight Savings:             http://bugs.php.net/fix.php?id=43793&r=dst
IIS Stability:                http://bugs.php.net/fix.php?id=43793&r=isapi
Install GNU Sed:              http://bugs.php.net/fix.php?id=43793&r=gnused
Floating point limitations:   http://bugs.php.net/fix.php?id=43793&r=float
No Zend Extensions:           http://bugs.php.net/fix.php?id=43793&r=nozend
MySQL Configuration Error:    http://bugs.php.net/fix.php?id=43793&r=mysqlcfg

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