[stable10] Backport of Use loadFromFile instead of loadFromFileHandle

[sharidas]

Use loadFromFile instead of loadFromFileHandle
while generating the thumbnail.

Signed-off-by: Sujith H sharidasan@owncloud.com

Description

When loadFromFileHandle is used for generating thumbnail of images, the problem found is that it doesn't fix the orientation of images with exif. While loadFromFile handles this. It uses exif_imagetype before checking the mimetype of the image file. There is a word of caution noted in the https://github.com/owncloud/core/blob/master/lib/private/legacy/image.php#L496 ( reference: http://php.net/manual/en/function.exif-imagetype.php#79283 ). With the changeset the orientation issue while generating preview is resolved.

Related Issue

• Fixes OC_Image doesn't always set imageType correctly #18645

Motivation and Context

This changeset fixes the orientation issue of images while generating preview.

How Has This Been Tested?

• Done basic test with a jpeg image with exif orientation. And the thumbnail was working. properly
• The image used for testing was taken from the issue mentioned in the PR.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Database schema changes (next release will require increase of minor version instead of patch)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:

Open tasks:

• Backport (if applicable set "backport-request" label and remove when the backport was done)

[sharidas]

Original PR #34297

[PVince81]

👍

[PVince81]

to release for 10.1.1

[codecov]

Codecov Report

Merging #34356 into stable10 will increase coverage by <.01%.
The diff coverage is 100%.

@@              Coverage Diff               @@
##             stable10   #34356      +/-   ##
==============================================
+ Coverage       63.48%   63.48%   +<.01%     
  Complexity      19121    19121              
==============================================
  Files            1264     1264              
  Lines           75190    75189       -1     
  Branches         1288     1288              
==============================================
+ Hits            47735    47737       +2     
+ Misses          27077    27074       -3     
  Partials          378      378

Flag	Coverage Δ	Complexity Δ
#javascript	53.31% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	64.57% <100%> (ø)	19121 <0> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
lib/private/Preview/Image.php	87.5% <100%> (ø)	5 <0> (ø)	⬇️
apps/encryption/templates/settings-admin.php	88.23% <0%> (-5.89%)	0% <0%> (ø)
apps/encryption/lib/Session.php	98.03% <0%> (-1.97%)	22% <0%> (ø)
apps/files_trashbin/lib/Expiration.php	96.55% <0%> (-1.73%)	29% <0%> (ø)
...eratedfilesharing/lib/Controller/OcmController.php	66.06% <0%> (-0.21%)	30% <0%> (ø)
lib/private/legacy/image.php	48.06% <0%> (+1.15%)	170% <0%> (ø)	⬇️

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