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Update FetchTaskTarget to propagate CSP violations. (#36409)

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It also updates the FetchResponseListener to process CSP violations to
ensure that iframe elements (amongst others) properly generate the CSP
events. These iframe elements are used in the Trusted Types tests
themselves and weren't propagating the violations before.

However, the tests themselves are still not passing since they also use
Websockets, which currently aren't using the fetch machinery itself.
That is fixed as part of [1].

[1]: https://github.com/servo/servo/issues/35028

---------

Signed-off-by: Tim van der Lippe <tvanderlippe@gmail.com>
Signed-off-by: Josh Matthews <josh@joshmatthews.net>
Co-authored-by: Josh Matthews <josh@joshmatthews.net>
This commit is contained in:
Tim van der Lippe 2025-04-13 22:54:59 +02:00 • committed by GitHub
parent 5d84acc06e
commit 85e4a2b5c7
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146 changed files with 511 additions and 612 deletions
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17
components/net/fetch/methods.rs
View file

@ -173,9 +173,9 @@ pub async fn fetch_with_cors_cache(
pub fn should_request_be_blocked_by_csp(
request: &Request,
policy_container: &PolicyContainer,
) -> csp::CheckResult {
) -> (csp::CheckResult, Vec<csp::Violation>) {
let origin = match &request.origin {
Origin::Client => return csp::CheckResult::Allowed,
Origin::Client => return (csp::CheckResult::Allowed, Vec::new()),
Origin::Origin(origin) => origin,
};
@ -190,12 +190,11 @@ pub fn should_request_be_blocked_by_csp(
parser_metadata: csp::ParserMetadata::None,
};
// TODO: Instead of ignoring violations, report them.
policy_container
.csp_list
.as_ref()
.map(|c| c.should_request_be_blocked(&csp_request).0)
.unwrap_or(csp::CheckResult::Allowed)
.map(|c| c.should_request_be_blocked(&csp_request))
.unwrap_or((csp::CheckResult::Allowed, Vec::new()))
}
/// [Main fetch](https://fetch.spec.whatwg.org/#concept-main-fetch)
@ -278,7 +277,13 @@ pub async fn main_fetch(
// Step 7. If should request be blocked due to a bad port, should fetching request be blocked
// as mixed content, or should request be blocked by Content Security Policy returns blocked,
// then set response to a network error.
if should_request_be_blocked_by_csp(request, &policy_container) == csp::CheckResult::Blocked {
let (check_result, violations) = should_request_be_blocked_by_csp(request, &policy_container);
if !violations.is_empty() {
target.process_csp_violations(request, violations);
}
if check_result == csp::CheckResult::Blocked {
warn!("Request blocked by CSP");
response = Some(Response::network_error(NetworkError::Internal(
"Blocked by Content-Security-Policy".into(),