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LibWeb: Avoid introducing a reference cycle in ResourceLoader::load()

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Previously we were kinda sorta resolving the reference cycle, but let's
just keep the requests in a hashtable instead of relying on hard to
track refcount tricks.
Fixes #7314.
This commit is contained in:
Ali Mohammad Pur 2021-09-19 02:56:05 +04:30 committed by Ali Mohammad Pur
parent 65f7e45a75
commit e780ee2832
Notes: sideshowbarker 2024-07-18 03:39:57 +09:00 
Author: https://github.com/alimpfard
Commit: https://github.com/SerenityOS/serenity/commit/e780ee2832b
Pull-request: https://github.com/SerenityOS/serenity/pull/10103
Reviewed-by: https://github.com/awesomekling
2 changed files with 7 additions and 5 deletions
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10
Userland/Libraries/LibWeb/Loader/ResourceLoader.cpp
View File

@ -191,7 +191,8 @@ void ResourceLoader::load(LoadRequest& request, Function<void(ReadonlyBytes, con
error_callback(start_request_failure_msg, {});
return;
}
protocol_request->on_buffered_request_finish = [this, success_callback = move(success_callback), error_callback = move(error_callback), log_success, log_failure, request, protocol_request](bool success, auto, auto& response_headers, auto status_code, ReadonlyBytes payload) {
m_active_requests.set(*protocol_request);
protocol_request->on_buffered_request_finish = [this, success_callback = move(success_callback), error_callback = move(error_callback), log_success, log_failure, request, &protocol_request = *protocol_request](bool success, auto, auto& response_headers, auto status_code, ReadonlyBytes payload) {
--m_pending_loads;
if (on_load_counter_change)
on_load_counter_change();
@ -202,12 +203,11 @@ void ResourceLoader::load(LoadRequest& request, Function<void(ReadonlyBytes, con
error_callback(http_load_failure_msg, {});
return;
}
deferred_invoke([protocol_request] {
// Clear circular reference of `protocol_request` captured by copy
const_cast<Protocol::Request&>(*protocol_request).on_buffered_request_finish = nullptr;
});
success_callback(payload, response_headers, status_code);
log_success(request);
deferred_invoke([this, &protocol_request] {
m_active_requests.remove(protocol_request);
});
};
protocol_request->set_should_buffer_all_input(true);
protocol_request->on_certificate_requested = []() -> Protocol::Request::CertificateAndKey {

2
Userland/Libraries/LibWeb/Loader/ResourceLoader.h
View File

@ -13,6 +13,7 @@
namespace Protocol {
class RequestClient;
class Request;
}
namespace Web {
@ -53,6 +54,7 @@ private:
int m_pending_loads { 0 };
HashTable<NonnullRefPtr<Protocol::Request>> m_active_requests;
RefPtr<Protocol::RequestClient> m_protocol_client;
String m_user_agent;
};