Bug #71730 [Ver->Fbk]: compression fails
Edit report at https://bugs.php.net/bug.php?id=71730&edit=1
ID: 71730
Updated by: cmb@php.net
Reported by: wowkise at gmai dot com
Summary: compression fails
-Status: Verified
+Status: Feedback
Type: Bug
Package: Output Control
Operating System: ubuntu
PHP Version: 7.2
-Assigned To:
+Assigned To: cmb
Block user comment: N
Private report: N
New Comment:
> the output_compression shouldn't have been sent, as there is an
> output before it
I don't think so. Check the INI setting output_buffering[1] which
likely buffered the var_dump() output, so that headers_sent()
correctly returned true.
[1] <https://www.php.net/manual/en/outcontrol.configuration.php#ini.output-buffering>
Previous Comments:
------------------------------------------------------------------------
[2018-07-07 16:08:15] spam2 at rhsoft dot net
anyways, zlib.output_compression is a bad idea!
other than apaches mod_defalte it don't take the client headers if it supports compression at
all into account
------------------------------------------------------------------------
[2018-07-07 15:51:13] wowkise at gmail dot com
rhsoft, you are correct what i meant is that headers_sent() check should have returned true as there
was content that was sent, therefore headers cant be send anymore.
------------------------------------------------------------------------
[2018-06-14 11:26:03] spam2 at rhsoft dot net
"the headers get sent anyway regardless if there is content before" is technically wrong -
they can't after the first body char and the problem is that compression happens even if
sending the header fails - so the client get compressed content which was not announced
------------------------------------------------------------------------
[2018-06-14 11:19:07] mike@php.net
Verified
------------------------------------------------------------------------
[2016-03-07 15:06:40] wowkise at gmai dot com
Description:
------------
if you take a look at the test script, the output_compression shouldn't have been sent, as
there is an output before it,
however, on Ubuntu 15.10, Using php5-fpm nginx, the headers get sent anyway regardless if there is
content before it or not, and that's breaks browsers, and shows errors such as
Chrome:
This webpage is not available - ERR_CONTENT_DECODING_FAILED
Firefox:
Content Encoding Error
The page you are trying to view cannot be shown because it uses an invalid or unsupported form of
compression.
Test script:
---------------
<?php
$obj = (object) [
'foo' => 'bar'
];
var_dump( $obj );
if ( !headers_sent() )
{
ini_set( 'zlib.output_compression', 1 );
}
Expected result:
----------------
the header shouldn't have been sent.
Actual result:
--------------
the header get sent which garbled the output, which in turn breaks the output_compression, and
causes the browsers to show error.
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=71730&edit=1
Thread (7 messages)