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Omit CSP report-uri when CSP_REPORT_URI is unset - #3178
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django-csp skips directives whose value is None, but wrapping the setting in a list sent the literal 'report-uri None' locally, so browsers POSTed violation reports to <page>/None.
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With
CSP_REPORT_URIunset (local dev), the Report-Only header went out as the literalreport-uri None, so browsers POSTed every violation report to<current page>/Noneand got 404s.django-csp 4.0 already leaves out directives whose value is
None, butbase.pywrapped the setting in a list ([_CSP_REPORT_URI]), so it stringifiedNoneinstead. This passes the bare value, which matches the existing comment.Checked by building the policy with
csp.utils.build_policy(report_only=True):CSP_REPORT_URIreport-uri Nonehttps://example.com/cspreport-uri https://example.com/cspProd sets the variable, so its header is unchanged.
pydotorg.tests.test_middlewarepasses.