Try to detect the connection status after flush() - this might lead to earlier detection of a broken connection

[DeepDiver1975]

Description

Bugfix: Earlier detection of connection status

On public video streaming the connection is detected to reduce server load #37219
To optimize this the connection status is queried after flush()

Related Issue

#37291

How Has This Been Tested?

Live at customer ;-)
same test steps as in #37291

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:
• Changelog item, see TEMPLATE

[codecov]

Codecov Report

Merging #37291 into master will not change coverage.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##             master   #37291   +/-   ##
=========================================
  Coverage     64.68%   64.68%           
  Complexity    19336    19336           
=========================================
  Files          1278     1278           
  Lines         75562    75562           
  Branches       1331     1331           
=========================================
  Hits          48876    48876           
  Misses        26294    26294           
  Partials        392      392           

Flag	Coverage Δ	Complexity Δ
#javascript	54.14% <ø> (ø)	0.00 <ø> (ø)
#phpunit	65.84% <0.00%> (ø)	19336.00 <0.00> (ø)

Impacted Files	Coverage Δ	Complexity Δ
lib/private/Files/View.php	83.36% <0.00%> (ø)	391.00 <0.00> (ø)

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[micbar]

@DeepDiver1975 please provide description

[DeepDiver1975]

@DeepDiver1975 please provide description

done

[phil-davis]

This PR was done in the time when we had trouble getting codecov/patch results from codecov.

@DeepDiver1975 rebase to get a fresh run of CI?
Or override and merge?

[mmattel]

Any progress?
Merging because already approved and CI is green?

[phil-davis]

I rebased because it will be nice to get a really current run of CI.
I requested a review from myself so that I see this again in my "review requests". Hopefully I can "just merge it" in a hour or so.