207 lines
7.5 KiB
C++
207 lines
7.5 KiB
C++
// Copyright (c) 2013 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "shell/renderer/electron_renderer_client.h"
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#include <string>
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#include "base/command_line.h"
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#include "content/public/renderer/render_frame.h"
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#include "electron/buildflags/buildflags.h"
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#include "net/http/http_request_headers.h"
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#include "shell/common/api/electron_bindings.h"
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#include "shell/common/gin_helper/dictionary.h"
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#include "shell/common/gin_helper/event_emitter_caller.h"
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#include "shell/common/node_bindings.h"
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#include "shell/common/node_includes.h"
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#include "shell/common/options_switches.h"
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#include "shell/renderer/electron_render_frame_observer.h"
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#include "shell/renderer/web_worker_observer.h"
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#include "third_party/blink/public/common/web_preferences/web_preferences.h"
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#include "third_party/blink/public/web/web_document.h"
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#include "third_party/blink/public/web/web_local_frame.h"
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namespace electron {
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namespace {
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bool IsDevToolsExtension(content::RenderFrame* render_frame) {
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return static_cast<GURL>(render_frame->GetWebFrame()->GetDocument().Url())
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.SchemeIs("chrome-extension");
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}
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} // namespace
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ElectronRendererClient::ElectronRendererClient()
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: node_bindings_(
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NodeBindings::Create(NodeBindings::BrowserEnvironment::kRenderer)),
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electron_bindings_(
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std::make_unique<ElectronBindings>(node_bindings_->uv_loop())) {}
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ElectronRendererClient::~ElectronRendererClient() = default;
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void ElectronRendererClient::RenderFrameCreated(
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content::RenderFrame* render_frame) {
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new ElectronRenderFrameObserver(render_frame, this);
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RendererClientBase::RenderFrameCreated(render_frame);
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}
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void ElectronRendererClient::RunScriptsAtDocumentStart(
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content::RenderFrame* render_frame) {
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RendererClientBase::RunScriptsAtDocumentStart(render_frame);
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// Inform the document start phase.
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v8::HandleScope handle_scope(v8::Isolate::GetCurrent());
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node::Environment* env = GetEnvironment(render_frame);
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if (env)
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gin_helper::EmitEvent(env->isolate(), env->process_object(),
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"document-start");
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}
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void ElectronRendererClient::RunScriptsAtDocumentEnd(
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content::RenderFrame* render_frame) {
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RendererClientBase::RunScriptsAtDocumentEnd(render_frame);
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// Inform the document end phase.
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v8::HandleScope handle_scope(v8::Isolate::GetCurrent());
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node::Environment* env = GetEnvironment(render_frame);
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if (env)
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gin_helper::EmitEvent(env->isolate(), env->process_object(),
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"document-end");
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}
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void ElectronRendererClient::DidCreateScriptContext(
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v8::Handle<v8::Context> renderer_context,
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content::RenderFrame* render_frame) {
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// TODO(zcbenz): Do not create Node environment if node integration is not
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// enabled.
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// Only load Node.js if we are a main frame or a devtools extension
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// unless Node.js support has been explicitly enabled for subframes.
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auto prefs = render_frame->GetBlinkPreferences();
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bool is_main_frame = render_frame->IsMainFrame();
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bool is_devtools = IsDevToolsExtension(render_frame);
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bool allow_node_in_subframes = prefs.node_integration_in_sub_frames;
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bool should_load_node =
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(is_main_frame || is_devtools || allow_node_in_subframes) &&
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!IsWebViewFrame(renderer_context, render_frame);
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if (!should_load_node)
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return;
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injected_frames_.insert(render_frame);
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if (!node_integration_initialized_) {
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node_integration_initialized_ = true;
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node_bindings_->Initialize();
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node_bindings_->PrepareMessageLoop();
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} else {
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node_bindings_->PrepareMessageLoop();
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}
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// Setup node tracing controller.
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if (!node::tracing::TraceEventHelper::GetAgent())
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node::tracing::TraceEventHelper::SetAgent(node::CreateAgent());
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// Setup node environment for each window.
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bool initialized = node::InitializeContext(renderer_context);
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CHECK(initialized);
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node::Environment* env =
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node_bindings_->CreateEnvironment(renderer_context, nullptr);
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// If we have disabled the site instance overrides we should prevent loading
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// any non-context aware native module.
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env->options()->force_context_aware = true;
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// We do not want to crash the renderer process on unhandled rejections.
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env->options()->unhandled_rejections = "warn";
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environments_.insert(env);
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// Add Electron extended APIs.
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electron_bindings_->BindTo(env->isolate(), env->process_object());
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gin_helper::Dictionary process_dict(env->isolate(), env->process_object());
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BindProcess(env->isolate(), &process_dict, render_frame);
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// Load everything.
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node_bindings_->LoadEnvironment(env);
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if (node_bindings_->uv_env() == nullptr) {
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// Make uv loop being wrapped by window context.
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node_bindings_->set_uv_env(env);
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// Give the node loop a run to make sure everything is ready.
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node_bindings_->RunMessageLoop();
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}
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}
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void ElectronRendererClient::WillReleaseScriptContext(
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v8::Handle<v8::Context> context,
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content::RenderFrame* render_frame) {
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if (injected_frames_.erase(render_frame) == 0)
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return;
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node::Environment* env = node::Environment::GetCurrent(context);
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if (environments_.erase(env) == 0)
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return;
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gin_helper::EmitEvent(env->isolate(), env->process_object(), "exit");
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// The main frame may be replaced.
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if (env == node_bindings_->uv_env())
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node_bindings_->set_uv_env(nullptr);
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// Destroying the node environment will also run the uv loop,
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// Node.js expects `kExplicit` microtasks policy and will run microtasks
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// checkpoints after every call into JavaScript. Since we use a different
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// policy in the renderer - switch to `kExplicit` and then drop back to the
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// previous policy value.
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v8::Isolate* isolate = context->GetIsolate();
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auto old_policy = isolate->GetMicrotasksPolicy();
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DCHECK_EQ(v8::MicrotasksScope::GetCurrentDepth(isolate), 0);
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isolate->SetMicrotasksPolicy(v8::MicrotasksPolicy::kExplicit);
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node::FreeEnvironment(env);
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if (env == node_bindings_->uv_env())
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node::FreeIsolateData(node_bindings_->isolate_data());
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isolate->SetMicrotasksPolicy(old_policy);
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// ElectronBindings is tracking node environments.
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electron_bindings_->EnvironmentDestroyed(env);
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}
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void ElectronRendererClient::WorkerScriptReadyForEvaluationOnWorkerThread(
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v8::Local<v8::Context> context) {
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// TODO(loc): Note that this will not be correct for in-process child windows
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// with webPreferences that have a different value for nodeIntegrationInWorker
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if (base::CommandLine::ForCurrentProcess()->HasSwitch(
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switches::kNodeIntegrationInWorker)) {
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WebWorkerObserver::GetCurrent()->WorkerScriptReadyForEvaluation(context);
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}
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}
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void ElectronRendererClient::WillDestroyWorkerContextOnWorkerThread(
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v8::Local<v8::Context> context) {
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// TODO(loc): Note that this will not be correct for in-process child windows
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// with webPreferences that have a different value for nodeIntegrationInWorker
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if (base::CommandLine::ForCurrentProcess()->HasSwitch(
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switches::kNodeIntegrationInWorker)) {
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WebWorkerObserver::GetCurrent()->ContextWillDestroy(context);
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}
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}
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node::Environment* ElectronRendererClient::GetEnvironment(
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content::RenderFrame* render_frame) const {
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if (injected_frames_.find(render_frame) == injected_frames_.end())
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return nullptr;
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v8::HandleScope handle_scope(v8::Isolate::GetCurrent());
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auto context =
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GetContext(render_frame->GetWebFrame(), v8::Isolate::GetCurrent());
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node::Environment* env = node::Environment::GetCurrent(context);
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if (environments_.find(env) == environments_.end())
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return nullptr;
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return env;
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}
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} // namespace electron
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