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https://jira.duraspace.org/browse/DS-740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Donohue updated DS-740:
---------------------------
Status: Volunteer Needed (was: Received)
> Allow media filter to set non-default permissions on derivative bitstreams
> --------------------------------------------------------------------------
>
> Key: DS-740
> URL: https://jira.duraspace.org/browse/DS-740
> Project: DSpace
> Issue Type: New Feature
> Components: DSpace API
> Reporter: Stuart Lewis
>
> At present, derivative bitstreams created by filter-media all take on the
> authZ policies of their parent item. In some cases, such as locked images,
> the thumbnail could still be open.
> From a recent thread on dspace-tech. It seems as if this would make a useful
> feature if we can agree on a set of requirements:
> Hi George,
> Thanks for your reply. Do you have open access to any of your content or is
> it all restricted? We have a mix which makes running the filter-media etc
> scripts interesting.
> Ideally the solution would be to set permissions at a collection level for
> each of the types of bundles. The item permissions would then inherit from
> the collection, or override if policies are set on individual items.. I don't
> seem to be able to do that (1.5).
> For reference, heres the (cutdown) SQL. This will update all thumbnail
> bitstream policies and set them to anonymous. We only had to do it for one
> group though. If you want to update intermediates, change THUMBNAIL to
> BRANDED_PREVIEW.
> update resourcepolicy
> set epersongroup_id=0
> where policy_id in (
> select
> rp.policy_id
> from
> resourcepolicy rp,
> bundle2bitstream bb,
> bundle b
> where
> b.name='THUMBNAIL'
> and b.bundle_id=bb.bundle_id
> and bb.bitstream_id=rp.resource_id
> );
> cheers,
> Steve
> On 04/11/2010, at 11:59 PM, George Stanley Kozak wrote:
> Steve:
> This is the way that thumbnails have worked for me at my site (we have been
> using DSpace since 2003). It can be frustrating. Your solution is
> interesting. I never thought about going into SQL to update the policies on
> the thumbnail bundles. I am not sure if there are any other solutions.
> George Kozak
> Digital Library Specialist
> Cornell University Library Information Technologies (CUL-IT)
> 501 Olin Library
> Cornell University
> Ithaca, NY 14853
> 607-255-8924
> -----Original Message-----
> From: Steve Swinsburg [mailto:[email protected]]
> Sent: Wednesday, November 03, 2010 9:39 PM
> To: [email protected]
> Subject: Re: [Dspace-tech] thumbnails restricted if main item is restricted
> We've fixed this up with some carefully crafted SQL to update the policies to
> the Anonymous group for the bitstreams in the thumbnail bundles, but it would
> be interesting to know if this is actually how things are meant to work, ie
> inherit the permissions from the parent item when generating the thumbnails.
> regards,
> Steve
> On 04/11/2010, at 10:53 AM, Steve Swinsburg wrote:
> Hi,
> We have a situation where some items in a collection are restricted, ie you
> need to login to access the full version. However we want the thumbnails and
> branded previews to still show up for the general public.
> When we run the thumbnail generator, it seems to inherit the permissions from
> the main bitstream, which means if the bitstream is protected, the thumbnail
> doesn't show up unless you are logged in and have the appropriate permission.
> Is this a common situation? We've inherited this instance so it might be a
> change made by people before us, but if anyone has addressed this, it would
> be great to hear from you.
> thanks,
> Steve
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