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LibWeb: Forbid sharing image requests across documents

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This change addresses the bug where images unable to load when the
reload button in the UI is clicked repeatedly. Before this fix, it was
possible to use SharedImageRequests across multiple documents. However,
when the document that initiated the request is gone, tasks scheduled
on the event loop remain in the fetching state because the originating
document is no longer active. Furthermore, another reason to prohibit
the sharing of image requests across documents is that the "Origin"
header in an image request is dependent on the document.
This commit is contained in:
Aliaksandr Kalenik 2023-10-17 16:52:16 +02:00 • committed by Andreas Kling
parent c2eaa0eb1c
commit 8ebb4e8047
4 changed files with 24 additions and 12 deletions
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22
Userland/Libraries/LibWeb/HTML/SharedImageRequest.cpp
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@ -18,36 +18,36 @@
namespace Web::HTML {
static HashMap<AK::URL, SharedImageRequest*>& shared_image_requests()
{
static HashMap<AK::URL, SharedImageRequest*> requests;
return requests;
}
JS::NonnullGCPtr<SharedImageRequest> SharedImageRequest::get_or_create(JS::Realm& realm, Page& page, AK::URL const& url)
{
if (auto it = shared_image_requests().find(url); it != shared_image_requests().end())
auto document = Bindings::host_defined_environment_settings_object(realm).responsible_document();
VERIFY(document);
auto& shared_image_requests = document->shared_image_requests();
if (auto it = shared_image_requests.find(url); it != shared_image_requests.end())
return *it->value;
auto request = realm.heap().allocate<SharedImageRequest>(realm, page, url);
shared_image_requests().set(url, request);
auto request = realm.heap().allocate<SharedImageRequest>(realm, page, url, *document);
shared_image_requests.set(url, request);
return request;
}
SharedImageRequest::SharedImageRequest(Page& page, AK::URL url)
SharedImageRequest::SharedImageRequest(Page& page, AK::URL url, JS::NonnullGCPtr<DOM::Document> document)
: m_page(page)
, m_url(move(url))
, m_document(document)
{
}
SharedImageRequest::~SharedImageRequest()
{
shared_image_requests().remove(m_url);
auto& shared_image_requests = m_document->shared_image_requests();
shared_image_requests.remove(m_url);
}
void SharedImageRequest::visit_edges(JS::Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_fetch_controller);
visitor.visit(m_document);
for (auto& callback : m_callbacks) {
visitor.visit(callback.on_finish);
visitor.visit(callback.on_fail);