Bug #80385 [Com]: Response data preceded by post data

From: Date: Mon, 23 Nov 2020 03:56:24 +0000
Subject: Bug #80385 [Com]: Response data preceded by post data
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-230529@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=80385&edit=1

 ID:                 80385
 Comment by:         306503207 at qq dot com
 Reported by:        306503207 at qq dot com
 Summary:            Response data preceded by post data
 Status:             Open
 Type:               Bug
 Package:            FPM related
 Operating System:   CentOS 7.4
 PHP Version:        7.2.34
 Block user comment: N
 Private report:     N

 New Comment:

After restarting PHP-fpm, the response is correct. After a period of time, this problem occurs
again.In your issue, does it work to restart php-fpm？


Previous Comments:
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[2020-11-22 23:48:17] requinix@php.net

Right, by "page" I meant the different refreshes of the page in the browser.
If the auto_prepend_file is different then maybe other things are different. Compare the phpinfo
outputs.

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[2020-11-22 23:13:26] shoebox at dnbradio dot com

Well I would agree with you that this is highly unlikely, but these are not 2 different php pages.
It is a single php page that I am refreshing and you can watch the value change from
"none" to "php://input" just by refreshing the page. 

There is nothing special about the configuration. It is a base install of php-fpm running on a
docker container with nginx setup as a standard reverse proxy.  I have even tried using
ini_set("auto_prepend_file","none"); at the top of my script but the phpinfo()
output shows auto_prepend_file changing on its own.

------------------------------------------------------------------------
[2020-11-22 22:18:11] requinix@php.net

I find it highly unlikely that PHP itself is randomly deciding to set auto_prepend_file to
php://input.
Compare the phpinfo outputs from the two different pages - are they perhaps using different php-fpm
pools or configurations?

------------------------------------------------------------------------
[2020-11-22 21:32:28] shoebox at dnbradio dot com

I thought perhaps this was caused by a misconfiguration but I found that even if I explicitly set
auto_prepend_file = none, the problem persists.

I have tested by creating a php script <?php phpinfo(); ?> and when I refresh the page over
and over I see the auto_prepend_file setting keeps changing back and forth from none to php://input

Here is a screen cap demonstrating the problem: https://www.dropbox.com/s/2kofxya97gmydpi/Nov-22-2020%2014-17-58.mp4?dl=0

------------------------------------------------------------------------
[2020-11-21 18:59:49] shoebox at dnbradio dot com

I can confirm the same issue is happening with my PHP-FPM instance. I have tested all the way up to
7.4 and the problem persists.

Steps to reproduce.
1. Create script called /test.php with code <?php echo "foo"; ?>
2. Make a POST request with post params bar=1 via x-www-form-urlencoded or raw to a PHP endpoint
over http.

Expected Result:
Response body should be "foo"

Actual Result:
Response body includes post params prepended to the HTTP response.
i.e. "bar=1test"

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The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at

    https://bugs.php.net/bug.php?id=80385


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Edit this bug report at https://bugs.php.net/bug.php?id=80385&edit=1

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