OCM. user cannot see the thumbnails of the shared image file

[ScharfViktor]

releated #10272

@rhafer and me think that it web issue. if you don't think so -> please move to ocis repo

ocis: 6.6.1+6f3322a3d
web: 11.0.1

setup: https://owncloud.dev/ocis/development/testing/#running-test-suite-with-federated-sharing-ocm with enabled vips
see how enable vips here: #10310 (comment)

Steps:

• 2 users create connection
• user1 creates folder f2 with .png file inside and shares to user2 -> user2 can see thumbnails of the image file
• user1 shares .png file to user2
• user2 tries to see .png file

Actual: user2 cannot see thumbnails and cannot open file in viewer

if I use https://github.com/owncloud/web/blob/master/docker-compose.yml (fresh ocis-rolling:master)-> user recipient cannot see thumbnails and open image files

cc @rhafer

[rhafer]

@rhafer and me think that it web issue. if you don't think so -> please move to ocis repo

I think it's a web issue, because web does not even seem to request the thumbnail. (Unless we overlooked something)

[kulmann]

I'm leaning towards it's a backend issue. The sharedWithMe endpoint claims that the image has application/octet-stream as mimetype. For those we don't fetch previews.