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Always try and show pre rendered preview #20451

Merged
merged 2 commits into from
Aug 13, 2020
Merged

Always try and show pre rendered preview #20451

merged 2 commits into from
Aug 13, 2020

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exussum12
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Currently if the following situation happens

Server generates preview
Server has command removed which allows a preview to be shown
Client asks for preview, gets a 404 error when preview exists
(Mime checked before preview)

This happens more often with documents, or video as the commands are not
native PHP, they require a binary on the server.

After the fix the following would happen

Server generates preview
Server has command removed which allows a preview to be shown
Client asks for preview, gets preview which has been generated
(Mime checked after preview)

This would also allow offline generation (for example a docker image
containing the extra binaries), allowing a reduction in attack surface
of the instance serving the preview data.

@gary-kim gary-kim added 3. to review Waiting for reviews enhancement labels Apr 13, 2020
@gary-kim gary-kim added this to the Nextcloud 19 milestone Apr 13, 2020
@gary-kim gary-kim requested review from icewind1991 and rullzer April 13, 2020 15:30
@rullzer rullzer mentioned this pull request Apr 13, 2020
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rullzer
rullzer approved these changes Apr 14, 2020
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Fine by me.

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rullzer commented Apr 14, 2020

@exussum12 seems the test fail. Mind to have a look?

This was referenced Apr 15, 2020
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@exussum12 exussum12 force-pushed the AllowPreviewWhenGeneratorHasBeenRemoved branch from 5c6ea6d to 4ab6721 Compare April 18, 2020 19:09
@rullzer rullzer mentioned this pull request Apr 23, 2020
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@juliusknorr
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There still seems to be an issue with one test:

There was 1 failure:

1) Test\Preview\GeneratorTest::testInvalidMimeType
Failed asserting that exception of type "TypeError" matches expected exception "OCP\Files\NotFoundException". Message was: "Argument 1 passed to Mock_IAppData_5c52be9a::getFolder() must be of the type string, null given, called in /drone/src/lib/private/Preview/Generator.php on line 460" at
/drone/src/lib/private/Preview/Generator.php:460
/drone/src/lib/private/Preview/Generator.php:129
/drone/src/lib/private/Preview/Generator.php:106
/drone/src/tests/lib/Preview/GeneratorTest.php:278
.

@juliusknorr juliusknorr added 2. developing Work in progress and removed 3. to review Waiting for reviews labels Apr 24, 2020
@rullzer rullzer modified the milestones: Nextcloud 19, Nextcloud 20 Apr 30, 2020
@MorrisJobke MorrisJobke mentioned this pull request Aug 11, 2020
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@exussum12 @MorrisJobke
Always try and show pre rendered preview
b12a390 
Currently if the following situation happens

Server generates preview
Server has command removed which allows a preview to be shown
Client asks for preview, gets a 404 error when preview exists
(Mime checked before preview)

This happens more often with documents, or video as the commands are not
native PHP, they require a binary on the server.

After the fix the following would happen

Server generates preview
Server has command removed which allows a preview to be shown
Client asks for preview, gets preview which has been generated
(Mime checked after preview)

This would also allow offline generation (for example a docker image
containing the extra binaries), allowing a reduction in attack surface
of the instance serving the preview data.

Signed-off-by: Scott Dutton <scott@exussum.co.uk>
@MorrisJobke MorrisJobke force-pushed the AllowPreviewWhenGeneratorHasBeenRemoved branch from 4ab6721 to b12a390 Compare August 13, 2020 20:50
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Rebased to check the tests again.

@MorrisJobke
Fix existing test and add a specific one for the new case
8e24956 
Signed-off-by: Morris Jobke <hey@morrisjobke.de>
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I fixed the test and added one specifically for this new use case.

MorrisJobke
MorrisJobke approved these changes Aug 13, 2020
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Fine with me 👍

@MorrisJobke MorrisJobke added 4. to release Ready to be released and/or waiting for tests to finish and removed 2. developing Work in progress labels Aug 13, 2020
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CI also likes it -> merge \o/

@MorrisJobke MorrisJobke merged commit 75c659c into nextcloud:master Aug 13, 2020
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@icewind1991 icewind1991 icewind1991 approved these changes

@MorrisJobke MorrisJobke MorrisJobke approved these changes

@rullzer rullzer rullzer approved these changes

@juliusknorr juliusknorr Awaiting requested review from juliusknorr

@ChristophWurst ChristophWurst Awaiting requested review from ChristophWurst

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6 participants
@exussum12 @rullzer @juliusknorr @MorrisJobke @icewind1991 @gary-kim