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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "web_channel_ipc_transport_host.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/web_contents.h"
#include "third_party/blink/public/common/associated_interfaces/associated_interface_provider.h"
#include "third_party/blink/public/common/associated_interfaces/associated_interface_registry.h"
#include "services/service_manager/public/cpp/interface_provider.h"
#include "qtwebengine/browser/qtwebchannel.mojom.h"
#include <QJsonDocument>
#include <QJsonObject>
#include <QLoggingCategory>
namespace QtWebEngineCore {
Q_LOGGING_CATEGORY(log, "qt.webengine.webchanneltransport")
inline QDebug operator<<(QDebug stream, content::RenderFrameHost *frame)
{
return stream << "frame " << frame->GetRoutingID() << " in process " << frame->GetProcess()->GetID();
}
WebChannelIPCTransportHost::WebChannelIPCTransportHost(content::WebContents *contents, uint worldId, QObject *parent)
: QWebChannelAbstractTransport(parent)
, content::WebContentsObserver(contents)
, m_worldId(worldId)
, m_receiver(contents, this)
{
contents->ForEachRenderFrameHost([this, worldId](content::RenderFrameHost *frame) {
setWorldId(frame, worldId);
});
}
WebChannelIPCTransportHost::~WebChannelIPCTransportHost()
{
resetWorldId();
}
uint WebChannelIPCTransportHost::worldId() const
{
return m_worldId;
}
void WebChannelIPCTransportHost::sendMessage(const QJsonObject &message)
{
QJsonDocument doc(message);
QByteArray json = doc.toJson(QJsonDocument::Compact);
content::RenderFrameHost *frame = web_contents()->GetPrimaryMainFrame();
qCDebug(log).nospace() << "sending webchannel message to " << frame << ": " << doc;
GetWebChannelIPCTransportRemote(frame)->DispatchWebChannelMessage(
std::vector<uint8_t>(json.begin(), json.end()), m_worldId);
}
void WebChannelIPCTransportHost::setWorldId(uint32_t worldId)
{
if (m_worldId == worldId)
return;
web_contents()->ForEachRenderFrameHost([this, worldId](content::RenderFrameHost *frame) {
setWorldId(frame, worldId);
});
m_worldId = worldId;
}
void WebChannelIPCTransportHost::setWorldId(content::RenderFrameHost *frame, uint32_t worldId)
{
if (!frame->IsRenderFrameLive())
return;
qCDebug(log).nospace() << "sending setWorldId(" << worldId << ") message to " << frame;
GetWebChannelIPCTransportRemote(frame)->SetWorldId(worldId);
}
void WebChannelIPCTransportHost::resetWorldId()
{
web_contents()->ForEachRenderFrameHost([this] (content::RenderFrameHost *frame) {
if (!frame->IsRenderFrameLive())
return;
GetWebChannelIPCTransportRemote(frame)->ResetWorldId();
});
}
void WebChannelIPCTransportHost::DispatchWebChannelMessage(const std::vector<uint8_t> &json)
{
content::RenderFrameHost *frame = web_contents()->GetPrimaryMainFrame();
if (m_receiver.GetCurrentTargetFrame() != frame) {
return;
}
QJsonDocument doc = QJsonDocument::fromJson(
QByteArray(reinterpret_cast<const char *>(json.data()), json.size()));
if (!doc.isObject()) {
qCCritical(log).nospace() << "received invalid webchannel message from " << frame;
return;
}
qCDebug(log).nospace() << "received webchannel message from " << frame << ": " << doc;
Q_EMIT messageReceived(doc.object(), this);
}
void WebChannelIPCTransportHost::RenderFrameCreated(content::RenderFrameHost *frame)
{
setWorldId(frame, m_worldId);
}
void WebChannelIPCTransportHost::RenderFrameDeleted(content::RenderFrameHost *rfh)
{
m_renderFrames.erase(rfh);
}
void WebChannelIPCTransportHost::BindReceiver(
mojo::PendingAssociatedReceiver<qtwebchannel::mojom::WebChannelTransportHost> receiver,
content::RenderFrameHost *rfh)
{
m_receiver.Bind(rfh, std::move(receiver));
}
const mojo::AssociatedRemote<qtwebchannel::mojom::WebChannelTransportRender> &
WebChannelIPCTransportHost::GetWebChannelIPCTransportRemote(content::RenderFrameHost *rfh)
{
auto it = m_renderFrames.find(rfh);
if (it == m_renderFrames.end()) {
mojo::AssociatedRemote<qtwebchannel::mojom::WebChannelTransportRender> remote;
rfh->GetRemoteAssociatedInterfaces()->GetInterface(remote.BindNewEndpointAndPassReceiver());
it = m_renderFrames.insert(std::make_pair(rfh, std::move(remote))).first;
} else if (it->second.is_bound() && !it->second.is_connected()) {
it->second.reset();
rfh->GetRemoteAssociatedInterfaces()->GetInterface(&it->second);
}
return it->second;
}
} // namespace QtWebEngineCore
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