File Upload not working on php
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	• bzimport
	Oct 19 2005, 4:33 PM

Description

Author: james.willans

Description:
Note Mediawiki is installed on a OpenBSD server running php 5.0.5.

I know this has been reported previously, and is a dealt with as a FAQ on the install
site, however I think there is a genuine bug with the uploading of files which manifests
itself as the message:

"The file you have uploaded seems to be empty. This might be due to a typo in the
filename. Please check whether you really want to upload this file".

I have checked all the obvious problems such as permissions on the images directory +
apache and php settings. Moreover other php based software residing on the same server
is allowing the uploading of large files without any issues.

I'm not a php expert but have delved a little bit into the code of includes/
SpecialUploads.php. Indeed the upload size of the file does seems to be zero when the
following expression is evaluated:

if( trim( $this->mOname ) == '' || empty( $this->mUploadSize ) )

although the name filename is correct (and is not empty, but does not contain the full
path). If I manually set the value of mUploadSize to a value > 0 then I induce a further
issue to do with invalid file extensions, if I comment out the code for checking valid
extension, then I start to get messages which suggest that details of the file are not
correctly being passed to the module (hence it evaluating the file size to 0):

Warning: fread(): supplied argument is not a valid stream resource in /usr/local/apache/
htdocs/knowledgebase/includes/SpecialUpload.php on line 746

Warning: fclose(): supplied argument is not a valid stream resource in /usr/local/apache/
htdocs/knowledgebase/includes/SpecialUpload.php on line 747

Internal error
Could not copy file "" to "/usr/local/apache/htdocs/knowledgebase/images/temp/f/f8/
20051019171557!UmlQ.tex".

I have tried using IE/Firefox and Opera with the same result.

James

Version: 1.5.x
Severity: normal
OS: Windows XP
Platform: PC

Details

Reference: bz3748

Event Timeline

• bzimport raised the priority of this task from to Medium.Nov 21 2014, 8:52 PM

• bzimport added a project: MediaWiki-Uploading.

• bzimport set Reference to bz3748.

• bzimport added a subscriber: Unknown Object (MLST).

• bzimport created this task.Oct 19 2005, 4:33 PM

Is the file you're uploading larger than the maximum upload size in php.ini?
Is the file you're uploading larger than the maximum post size in php.ini?
Are broken "security" features in PHP such as "safe mode" or "open_basedir" on in

php.ini?

Is this a genuine PHP or some hacked-up OpenBSD version which is more "secure" by

breaking uploads? ;)

james.willans wrote:

As I said in my original message I have checked the php.ini to make sure it allows
the size of files I am wanting to upload. In any case, I am able to upload exactly
the same files using other php based applications running on the same server. There
are no extra security features in my PHP install, and it was compiled from source
without any OpenBSD specific features. Again I say that I can upload exactly the
same files using other php based applications running on the same server.

I have no experience of PHP, but am willing to try and hack the scripts if this will
help point towards the cause of this problem. However I need advise on what I need
to be looking at and checking.

I also notice strange behaviours:

a) the file size being 2,7 MByte, but the wiki upload function says"...file size
is 571 344 bytes" and
b) the "Could not copy file
"/home/www/wiki/images/temp/4/41/20051019225435!051007162048.jpg" to
"/home/www/wiki/images/4/41/051007162048.jpg" "

Uploads of 700.000 byte big files w/o problems.

james.willans wrote:

While we get to the bottom of this problem, is there a way of manually uploading
files using ftp such that mediawiki will recognise the files? I have tried placing
image files in the /images directory but mediawiki doesn't seem to recognise these
when I place the image tag in the text.

robchur wrote:

MediaWiki maintains information about image uploads in a database. Furthermore,
the images directory is, by default, structured in a "hashed" manner, with
folders named, for instance:

/a
/a/aa
/b/
/b/ba/

...and so forth. The software doesn't like recognising files in other locations.
Having said that, one could upload the images elsewhere, and configure MediaWiki
to use that location as a shared upload directory; see
http://meta.wikimedia.org/wiki/Help:Configuration_settings_index#Shared_uploads
for information on this feature, and how to configure it.

james.willans wrote:

Rob thanks for your help.

Please close this bug, I began to experience other problems
with php not being being able to write its session data to
files. I subsequently downgraded php from a 5 to a 4
stream and everything seems to have begun working again
including the uploading of files using wikimedia.

Many thanks everyone for your speedy responses.

• Gilles added a project: Multimedia.Dec 4 2014, 10:45 AM

• Gilles moved this task from Untriaged to Done on the Multimedia board.

File Upload not working on phpClosed, InvalidPublicActions

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File Upload not working on php
Closed, InvalidPublic
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