* fix: ensure corsEnabled: false protocol handlers do not work across protocols (#51152)
* fix: ensure corsEnabled: false protocol handlers do not work across protocols
Subresource requests for registered custom protocols are routed to
ElectronURLLoaderFactory via the renderer's per-scheme URLLoaderFactoryBundle
entry, which bypasses the network service's CorsURLLoaderFactory. This meant a
cross-origin page could fetch() a scheme registered with {supportFetchAPI: true}
and read the response body even when {corsEnabled: true} was not set.
Replicate CorsURLLoader::StartRequest's kCorsDisabledScheme gate in
ElectronURLLoaderFactory::CreateLoaderAndStart so cross-origin mode=cors
requests to such schemes fail before the JS handler runs, and tag cross-origin
mode=no-cors responses as opaque so the body is not script-readable while <img>
and similar subresource loads continue to work.
Re-enable the long-disabled "disallows CORS and fetch requests when only
supportFetchAPI is specified" test, add coverage for the opaque/no-cors,
same-origin, handler-not-invoked, corsEnabled-unaffected and net.fetch-unaffected
cases, and migrate spec helpers that were exercising a {supportFetchAPI: true}
scheme cross-origin to a corsEnabled scheme.
* chore: oxfmt
(cherry picked from commit 92f0993d94)
* chore: fix build
* fixup! chore: fix build
chore: make linter happy
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Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
Co-authored-by: Charles Kerr <charles@charleskerr.com>
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