[[template id=plugin name=conditional core=1 author="[[Joey]]"]]
[[tag type/useful]]
This plugin allows files to be uploaded to the wiki over the web.
For each page foo, files in the subdirectory foo/ are treated as
attachments of that page. Attachments can be uploaded and managed as
part of the interface for editing a page.
Warning: Do not enable this plugin on publically editable wikis, unless you
take care to lock down the types and sizes of files that can be uploaded.
Bear in mind that if you let anyone upload a particular kind of file
("*.mp3" files, say), then someone can abuse your wiki in at least three ways:
- By uploading many mp3 files, wasting your disk space.
- By uploading mp3 files that attempt to exploit security holes
in web browsers or other players.
- By uploading files that claim to be mp3 files, but are really some
other kind of file. Some web browsers may display a
foo.mp3 that
contains html as a web page; including running any malicious javascript
embedded in that page.
To provide a way to combat these abuses, the wiki admin can specify a
[[ikiwiki/PageSpec]] on their preferences page, to control what types of
attachments can be uploaded. The regular [[ikiwiki/PageSpec]] syntax is
expanded with additional tests.
For example, to limit arbitrary files to 50 kilobtes, but allow
larger mp3 files to be uploaded, a test like this could be used:
(*.mp3 and maxsize(15mb)) or (!ispage() and maxsize(50kb))
The following additional tests are available:
-
maxsize(size)
Tests whether the attachment is no larger than the specified size.
The size defaults to being in bytes, but "kb", "mb", "gb" etc can be
used to specify the units.
-
minsize(size)
Tests whether the attachment is no smaller than the specified size.
-
ispage()
Tests whether the attachment will be treated by ikiwiki as a wiki page.
(Ie, if it has an extension of ".mdwn", or of any other enabled page
format).
So, if you don't want to allow wiki pages to be uploaded as attachments,
use !ispage() ; if you only want to allow wiki pages to be uploaded
as attachments, use ispage().
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