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LibWeb/CSS: Parse and use CSS URL request modifiers

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Sam Atkins 2025-05-02 17:25:56 +01:00 • committed by Tim Ledbetter
parent 09b508d8e8
commit de6df6f403
Notes: github-actions[bot] 2025-05-03 22:23:41 +00:00
10 changed files with 337 additions and 89 deletions
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24
Libraries/LibWeb/CSS/Fetch.cpp
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@ -55,10 +55,15 @@ static WebIDL::ExceptionOr<GC::Ref<Fetch::Infrastructure::Request>> fetch_a_styl
request->set_client(&environment_settings);
request->set_referrer(environment_settings.api_base_url());
// 5. Apply any URL request modifier steps that apply to this request.
// FIXME: No specs seem to define these yet. When they do, implement them.
// 5. If corsMode is "no-cors", set req’s credentials mode to "include".
if (cors_mode == CorsMode::NoCors)
request->set_credentials_mode(Fetch::Infrastructure::Request::CredentialsMode::Include);
// 6. If req’s mode is "cors", set req’s referrer to sheet’s location. [CSSOM]
// 6. Apply any URL request modifier steps that apply to this request.
if (auto const* css_url = url_value.get_pointer<CSS::URL>())
apply_request_modifiers_from_url_value(*css_url, request);
// 7. If req’s mode is "cors", set req’s referrer to sheet’s location. [CSSOM]
if (request->mode() == Fetch::Infrastructure::Request::Mode::CORS) {
auto location = sheet_or_document.visit(
[](GC::Ref<CSSStyleSheet> const& sheet) { return sheet->location().value(); },
@ -66,11 +71,11 @@ static WebIDL::ExceptionOr<GC::Ref<Fetch::Infrastructure::Request>> fetch_a_styl
request->set_referrer(move(location));
}
// 7. If sheet’s origin-clean flag is set, set req’s initiator type to "css". [CSSOM]
// 8. If sheet’s origin-clean flag is set, set req’s initiator type to "css". [CSSOM]
if (auto* sheet = sheet_or_document.get_pointer<GC::Ref<CSSStyleSheet>>(); sheet && (*sheet)->is_origin_clean())
request->set_initiator_type(Fetch::Infrastructure::Request::InitiatorType::CSS);
// 8. Fetch req, with processresponseconsumebody set to processResponse.
// 9. Fetch req, with processresponseconsumebody set to processResponse.
// NB: Implemented by caller.
return request;
}
@ -131,4 +136,13 @@ GC::Ptr<HTML::SharedResourceRequest> fetch_an_external_image_for_a_stylesheet(St
return shared_resource_request;
}
// https://drafts.csswg.org/css-values-5/#apply-request-modifiers-from-url-value
void apply_request_modifiers_from_url_value(URL const& url, GC::Ref<Fetch::Infrastructure::Request> request)
{
// To apply request modifiers from URL value given a request req and a <url> url, call the URL request modifier
// steps for url’s <request-url-modifier>s in sequence given req.
for (auto const& request_url_modifier : url.request_url_modifiers())
request_url_modifier.modify_request(request);
}
}