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Fix reporting when only the report-only CSP header is present (#38002)

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This was a bit confusing at first, but the report-only only
had an effect if it was used in conjunction with the regular
CSP header. This is incorrect, as the report-only header
can be present on its own.

Additionally, there was double-logic for parsing the CSP list
values, since we can only concatenate CSP lists if we have
an initial value, which requires a concrete policy value.

Therefore, abstract that way by looping over both headers and
handling the case where initially it is `None` and, if the
CSP header is not present, still `None` when we parse
the `report-only` header.

Additionally, update a WPT test. It was expecting the image
to load, yet was showing the fail image.

Part of #4577

Signed-off-by: Tim van der Lippe <tvanderlippe@gmail.com>
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Tim van der Lippe 2025-07-12 12:38:30 +02:00 • committed by GitHub
parent 9b5b26386c
commit 2c116f4011
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15 changed files with 48 additions and 124 deletions
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3
tests/wpt/meta/content-security-policy/script-src/eval-allowed-in-report-only-mode-and-sends-report.html.ini vendored
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[eval-allowed-in-report-only-mode-and-sends-report.html]
[Violation report status OK.]
expected: FAIL