fix: request to preview gives 500 error for old/new webdav if file is in processing

[saw-jan]

Description

Fix the status code and message when a thumbnail request is made too early.

For old/new/spaces endpoints.

Current:

< HTTP/1.1 500 Internal Server Error
< 
<?xml version="1.0" encoding="UTF-8"?>
<d:error xmlns:d="DAV" xmlns:s="http://sabredav.org/ns">
  <s:exception></s:exception>
  <s:message>
    {&#34;id&#34;:&#34;com.owncloud.api.thumbnails&#34;,&#34;code&#34;:425,&#34;detail&#34;:&#34;File Processing&#34;,&#34;status&#34;:&#34;Too Early&#34;}
  </s:message>
</d:error>

With Fix:

< HTTP/1.1 425 Too Early
< 
<?xml version="1.0" encoding="UTF-8"?>
<d:error xmlns:d="DAV" xmlns:s="http://sabredav.org/ns">
  <s:exception></s:exception>
  <s:message>File Processing</s:message>
</d:error>

Related Issue

• Fixes Early request in previewing a file gives 500 server error for old and new webdav #7502
• Closes [QA] Downloading file preview can sometimes fail with 500 error #7338

How Has This Been Tested?

• test environment: local

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• 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:

[kobergj]

LGTM 👍

[micbar]

@saw-jan
Changelog pipeline failing file ../changelog/unreleased/fix-too-early-preview-request.md: title is too long

[saw-jan]

@saw-jan Changelog pipeline failing file ../changelog/unreleased/fix-too-early-preview-request.md: title is too long

Thanks, I reduced the sentence. should work now

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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