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// Copyright (c) 2019 Slack Technologies, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "electron/shell/renderer/electron_api_service_impl.h"
#include <memory>
#include <utility>
#include <vector>
#include "base/environment.h"
#include "base/trace_event/trace_event.h"
#include "gin/data_object_builder.h"
#include "mojo/public/cpp/system/platform_handle.h"
#include "shell/common/electron_constants.h"
#include "shell/common/gin_converters/blink_converter.h"
#include "shell/common/gin_converters/value_converter.h"
#include "shell/common/heap_snapshot.h"
#include "shell/common/node_includes.h"
#include "shell/common/options_switches.h"
#include "shell/common/thread_restrictions.h"
#include "shell/common/v8_value_serializer.h"
#include "shell/renderer/electron_render_frame_observer.h"
#include "shell/renderer/renderer_client_base.h"
#include "third_party/blink/public/mojom/frame/user_activation_notification_type.mojom-shared.h"
#include "third_party/blink/public/web/blink.h"
#include "third_party/blink/public/web/web_local_frame.h"
#include "third_party/blink/public/web/web_message_port_converter.h"
namespace electron {
namespace {
const char kIpcKey[] = "ipcNative";
// Gets the private object under kIpcKey
v8::Local<v8::Object> GetIpcObject(v8::Local<v8::Context> context) {
auto* isolate = context->GetIsolate();
auto binding_key = gin::StringToV8(isolate, kIpcKey);
auto private_binding_key = v8::Private::ForApi(isolate, binding_key);
auto global_object = context->Global();
auto value =
global_object->GetPrivate(context, private_binding_key).ToLocalChecked();
if (value.IsEmpty() || !value->IsObject()) {
LOG(ERROR) << "Attempted to get the 'ipcNative' object but it was missing";
return v8::Local<v8::Object>();
}
return value->ToObject(context).ToLocalChecked();
}
void InvokeIpcCallback(v8::Local<v8::Context> context,
const std::string& callback_name,
std::vector<v8::Local<v8::Value>> args) {
TRACE_EVENT0("devtools.timeline", "FunctionCall");
auto* isolate = context->GetIsolate();
auto ipcNative = GetIpcObject(context);
if (ipcNative.IsEmpty())
return;
// Only set up the node::CallbackScope if there's a node environment.
// Sandboxed renderers don't have a node environment.
node::Environment* env = node::Environment::GetCurrent(context);
std::unique_ptr<node::CallbackScope> callback_scope;
if (env) {
node::async_context async_context = {};
callback_scope = std::make_unique<node::CallbackScope>(isolate, ipcNative,
async_context);
}
auto callback_key = gin::ConvertToV8(isolate, callback_name)
->ToString(context)
.ToLocalChecked();
auto callback_value = ipcNative->Get(context, callback_key).ToLocalChecked();
DCHECK(callback_value->IsFunction()); // set by init.ts
auto callback = callback_value.As<v8::Function>();
std::ignore = callback->Call(context, ipcNative, args.size(), args.data());
}
void EmitIPCEvent(v8::Local<v8::Context> context,
bool internal,
const std::string& channel,
std::vector<v8::Local<v8::Value>> ports,
v8::Local<v8::Value> args,
int32_t sender_id) {
auto* isolate = context->GetIsolate();
v8::HandleScope handle_scope(isolate);
v8::Context::Scope context_scope(context);
v8::MicrotasksScope script_scope(isolate, context->GetMicrotaskQueue(),
v8::MicrotasksScope::kRunMicrotasks);
std::vector<v8::Local<v8::Value>> argv = {
gin::ConvertToV8(isolate, internal), gin::ConvertToV8(isolate, channel),
gin::ConvertToV8(isolate, ports), args,
gin::ConvertToV8(isolate, sender_id)};
InvokeIpcCallback(context, "onMessage", argv);
}
} // namespace
ElectronApiServiceImpl::~ElectronApiServiceImpl() = default;
ElectronApiServiceImpl::ElectronApiServiceImpl(
content::RenderFrame* render_frame,
RendererClientBase* renderer_client)
: content::RenderFrameObserver(render_frame),
renderer_client_(renderer_client) {
registry_.AddInterface<mojom::ElectronRenderer>(base::BindRepeating(
&ElectronApiServiceImpl::BindTo, base::Unretained(this)));
}
void ElectronApiServiceImpl::BindTo(
mojo::PendingReceiver<mojom::ElectronRenderer> receiver) {
if (document_created_) {
if (receiver_.is_bound())
receiver_.reset();
receiver_.Bind(std::move(receiver));
receiver_.set_disconnect_handler(base::BindOnce(
&ElectronApiServiceImpl::OnConnectionError, GetWeakPtr()));
} else {
pending_receiver_ = std::move(receiver);
}
}
void ElectronApiServiceImpl::OnInterfaceRequestForFrame(
const std::string& interface_name,
mojo::ScopedMessagePipeHandle* interface_pipe) {
registry_.TryBindInterface(interface_name, interface_pipe);
}
void ElectronApiServiceImpl::DidCreateDocumentElement() {
document_created_ = true;
if (pending_receiver_) {
if (receiver_.is_bound())
receiver_.reset();
receiver_.Bind(std::move(pending_receiver_));
receiver_.set_disconnect_handler(base::BindOnce(
&ElectronApiServiceImpl::OnConnectionError, GetWeakPtr()));
}
}
void ElectronApiServiceImpl::OnDestruct() {
delete this;
}
void ElectronApiServiceImpl::OnConnectionError() {
if (receiver_.is_bound())
receiver_.reset();
}
void ElectronApiServiceImpl::Message(bool internal,
const std::string& channel,
blink::CloneableMessage arguments,
int32_t sender_id) {
blink::WebLocalFrame* frame = render_frame()->GetWebFrame();
if (!frame)
return;
v8::Isolate* isolate = blink::MainThreadIsolate();
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> context = renderer_client_->GetContext(frame, isolate);
v8::Context::Scope context_scope(context);
v8::Local<v8::Value> args = gin::ConvertToV8(isolate, arguments);
EmitIPCEvent(context, internal, channel, {}, args, sender_id);
}
void ElectronApiServiceImpl::ReceivePostMessage(
const std::string& channel,
blink::TransferableMessage message) {
blink::WebLocalFrame* frame = render_frame()->GetWebFrame();
if (!frame)
return;
v8::Isolate* isolate = blink::MainThreadIsolate();
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> context = renderer_client_->GetContext(frame, isolate);
v8::Context::Scope context_scope(context);
v8::Local<v8::Value> message_value = DeserializeV8Value(isolate, message);
std::vector<v8::Local<v8::Value>> ports;
for (auto& port : message.ports) {
ports.emplace_back(
blink::WebMessagePortConverter::EntangleAndInjectMessagePortChannel(
context, std::move(port)));
}
std::vector<v8::Local<v8::Value>> args = {message_value};
EmitIPCEvent(context, false, channel, ports, gin::ConvertToV8(isolate, args),
0);
}
void ElectronApiServiceImpl::TakeHeapSnapshot(
mojo::ScopedHandle file,
TakeHeapSnapshotCallback callback) {
ScopedAllowBlockingForElectron allow_blocking;
base::ScopedPlatformFile platform_file;
if (mojo::UnwrapPlatformFile(std::move(file), &platform_file) !=
MOJO_RESULT_OK) {
LOG(ERROR) << "Unable to get the file handle from mojo.";
std::move(callback).Run(false);
return;
}
base::File base_file(std::move(platform_file));
bool success =
electron::TakeHeapSnapshot(blink::MainThreadIsolate(), &base_file);
std::move(callback).Run(success);
}
} // namespace electron