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https://github.com/LadybirdBrowser/ladybird.git
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58bc44ba2a
To aid with debugging web page issues in Ladybird without needing to implement a fully fledged inspector, we can implement the Firefox DevTools protocol and use their DevTools. The protocol is described here: https://firefox-source-docs.mozilla.org/devtools/backend/protocol.html This commit contains just enough to connect to Ladybird from a DevTools client.
107 lines
2.9 KiB
C++
107 lines
2.9 KiB
C++
/*
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* Copyright (c) 2025, Tim Flynn <trflynn89@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Debug.h>
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#include <AK/JsonObject.h>
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#include <AK/JsonValue.h>
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#include <LibCore/EventLoop.h>
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#include <LibCore/Socket.h>
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#include <LibCore/TCPServer.h>
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#include <LibDevTools/Actors/DeviceActor.h>
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#include <LibDevTools/Actors/PreferenceActor.h>
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#include <LibDevTools/Actors/ProcessActor.h>
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#include <LibDevTools/Connection.h>
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#include <LibDevTools/DevToolsServer.h>
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namespace DevTools {
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static u64 s_server_count = 0;
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ErrorOr<NonnullOwnPtr<DevToolsServer>> DevToolsServer::create(DevToolsDelegate& delegate, u16 port)
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{
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auto address = IPv4Address::from_string("0.0.0.0"sv).release_value();
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auto server = TRY(Core::TCPServer::try_create());
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TRY(server->listen(address, port, Core::TCPServer::AllowAddressReuse::Yes));
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return adopt_own(*new DevToolsServer(delegate, move(server)));
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}
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DevToolsServer::DevToolsServer(DevToolsDelegate& delegate, NonnullRefPtr<Core::TCPServer> server)
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: m_server(move(server))
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, m_delegate(delegate)
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, m_server_id(s_server_count++)
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{
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m_server->on_ready_to_accept = [this]() {
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if (auto result = on_new_client(); result.is_error())
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warnln("Failed to accept DevTools client: {}", result.error());
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};
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}
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DevToolsServer::~DevToolsServer() = default;
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ErrorOr<void> DevToolsServer::on_new_client()
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{
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if (m_connection)
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return Error::from_string_literal("Only one active DevTools connection is currently allowed");
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auto client = TRY(m_server->accept());
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auto buffered_socket = TRY(Core::BufferedTCPSocket::create(move(client)));
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m_connection = Connection::create(move(buffered_socket));
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m_connection->on_connection_closed = [this]() {
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close_connection();
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};
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m_connection->on_message_received = [this](auto const& message) {
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on_message_received(message);
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};
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m_root_actor = register_actor<RootActor>();
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register_actor<DeviceActor>();
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register_actor<PreferenceActor>();
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register_actor<ProcessActor>(ProcessDescription { .is_parent = true });
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return {};
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}
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void DevToolsServer::on_message_received(JsonObject const& message)
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{
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auto to = message.get_byte_string("to"sv);
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if (!to.has_value()) {
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m_root_actor->send_missing_parameter_error("to"sv);
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return;
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}
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auto actor = m_actor_registry.find(*to);
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if (actor == m_actor_registry.end()) {
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m_root_actor->send_unknown_actor_error(*to);
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return;
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}
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auto type = message.get_byte_string("type"sv);
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if (!type.has_value()) {
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actor->value->send_missing_parameter_error("type"sv);
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return;
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}
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actor->value->handle_message(*type, message);
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}
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void DevToolsServer::close_connection()
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{
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dbgln_if(DEVTOOLS_DEBUG, "Lost connection to the DevTools client");
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Core::deferred_invoke([this]() {
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m_connection = nullptr;
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m_actor_registry.clear();
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m_root_actor = nullptr;
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});
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}
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}
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