Bug #79681 [Ana->Csd]: mime_content_type/finfo returning incorrect mimetype

From: Date: Wed, 10 Jun 2020 14:41:41 +0000
Subject: Bug #79681 [Ana->Csd]: mime_content_type/finfo returning incorrect mimetype
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-227410@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=79681&edit=1

 ID:                 79681
 Updated by:         cmb@php.net
 Reported by:        xandros92 at gmail dot com
 Summary:            mime_content_type/finfo returning incorrect mimetype
-Status:             Analyzed
+Status:             Closed
 Type:               Bug
 Package:            *Directory/Filesystem functions
 Operating System:   Windows 10 1909
 PHP Version:        7.4.6
 Assigned To:        cmb
 Block user comment: N
 Private report:     N

 New Comment:

Automatic comment on behalf of cmbecker69@gmx.de
Revision: http://git.php.net/?p=php-src.git;a=commit;h=6747068ce716ca9e458b245489086d7ff13109b9
Log: Fix #79681: mime_content_type/finfo returning incorrect mimetype


Previous Comments:
------------------------------------------------------------------------
[2020-06-09 13:49:45] cmb@php.net

Thanks for the samples!

I can confirm the behavior.  Reporting the .xml.gz as
application/gzip is actually an improvement, since this mime type
is registered[1]. Reporting the .mp3 as application/x-font-gdos is
obviously wrong, and has been fixed[2] for file 5.38.

[1] <https://www.iana.org/assignments/media-types/media-types.xhtml>
[2] <https://github.com/file/file/commit/5a55569a35eff686d4b7400b219d380f7c622890>

------------------------------------------------------------------------
[2020-06-09 10:06:52] xandros92 at gmail dot com

https://drive.google.com/drive/folders/1NZ48AWys6pTTvbfOoiEHXP2rLL93Tmjy?usp=sharing

------------------------------------------------------------------------
[2020-06-08 12:33:58] cmb@php.net

Can you please make sample.xml.gz and sample.mp3 available for download?

------------------------------------------------------------------------
[2020-06-08 11:19:20] xandros92 at gmail dot com

Description:
------------
After change php version from 7.3 and 7.2 to 7.4, some applications failed validation uploaded files
on mimetype. The problem exist with some audio/mpeg and application/x-gzip.

Test script:
---------------
echo finfo_file(finfo_open(), __DIR__ . '/sample.xml.gz', FILEINFO_MIME);
echo finfo_file(finfo_open(), __DIR__ . '/sample.mp3, FILEINFO_MIME);

Expected result:
----------------
application/x-gzip; charset=binary
audio/mpeg; charset=binary


Actual result:
--------------
application/gzip; charset=binary
application/x-font-gdos; charset=binary



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