move attachment pagespec extensions docs to its own page
in the basewiki, so I can link to it theremaster
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[[!meta robots="noindex, follow"]]
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[[!if test="enabled(attachment)"
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then="This wiki has attachments **enabled**."
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else="This wiki has attachments **disabled**."]]
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If attachments are enabled, the wiki admin can control what types of
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attachments will be accepted, by entering a [[ikiwiki/PageSpec]] in the
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"Allowed Attachments" field of their preferences page.
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For example, to limit arbitrary files to 50 kilobytes, but allow
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larger mp3 files to be uploaded by joey, a something like this could be
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used:
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(user(joey) and *.mp3 and mimetype(audio/mpeg) and maxsize(15mb)) or (!ispage() and maxsize(50kb))
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The regular [[ikiwiki/PageSpec]] syntax is expanded with thw following
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additional tests:
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* maxsize(size)
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Tests whether the attachment is no larger than the specified size.
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The size defaults to being in bytes, but "kb", "mb", "gb" etc can be
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used to specify the units.
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* minsize(size)
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Tests whether the attachment is no smaller than the specified size.
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* ispage()
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Tests whether the attachment will be treated by ikiwiki as a wiki page.
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(Ie, if it has an extension of ".mdwn", or of any other enabled page
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format).
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So, if you don't want to allow wiki pages to be uploaded as attachments,
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use `!ispage()` ; if you only want to allow wiki pages to be uploaded
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as attachments, use `ispage()`.
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* user(username)
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Tests whether the attachment is being uploaded by a user with the
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specified username. If openid is enabled, an openid can also be put here.
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* ip(address)
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Tests whether the attacment is being uploaded from the specified IP
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address.
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* mimetype(foo/bar)
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This checks the MIME type of the attachment. You can include a glob
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in the type, for example `mimetype(image/*)`.
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@ -20,51 +20,9 @@ Bear in mind that if you let anyone upload a particular kind of file
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contains html as a web page; including running any malicious javascript
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embedded in that page.
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To provide a way to combat these abuses, the wiki admin can specify a
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[[ikiwiki/PageSpec]] on their preferences page, to control what types of
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attachments can be uploaded, and by whom. The regular [[ikiwiki/PageSpec]]
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syntax is expanded with additional tests.
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If you enable this plugin, be sure to lock that down, by entering a
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[[special_PageSpec|ikiwiki/pagespec/attachment]] in the "Allowed
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Attachments" field of the wiki admin's preferences page.
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For example, to limit arbitrary files to 50 kilobytes, but allow
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larger mp3 files to be uploaded by joey, a test like this could be
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used:
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(user(joey) and *.mp3 and mimetype(audio/mpeg) and maxsize(15mb)) or (!ispage() and maxsize(50kb))
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The following additional tests are available:
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* maxsize(size)
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Tests whether the attachment is no larger than the specified size.
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The size defaults to being in bytes, but "kb", "mb", "gb" etc can be
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used to specify the units.
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* minsize(size)
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Tests whether the attachment is no smaller than the specified size.
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* ispage()
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Tests whether the attachment will be treated by ikiwiki as a wiki page.
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(Ie, if it has an extension of ".mdwn", or of any other enabled page
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format).
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So, if you don't want to allow wiki pages to be uploaded as attachments,
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use `!ispage()` ; if you only want to allow wiki pages to be uploaded
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as attachments, use `ispage()`.
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* user(username)
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Tests whether the attachment is being uploaded by a user with the
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specified username. If openid is enabled, an openid can also be put here.
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* ip(address)
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Tests whether the attacment is being uploaded from the specified IP
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address.
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* mimetype(foo/bar)
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If the [[cpan File::MimeInfo::Magic]] perl module is installed, this
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allows checking the mime type of the attachment. You can include a glob
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in the type, for example `mimetype(image/*)`.
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This plugin will use the [[cpan File::MimeInfo::Magic]] perl module, if
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available, for mimetype checking.
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