239 lines
8.5 KiB
C++
239 lines
8.5 KiB
C++
// Copyright (c) 2016 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_sandboxed_renderer_client.h"
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#include <tuple>
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#include <vector>
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#include "base/base_paths.h"
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#include "base/command_line.h"
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#include "base/files/file_path.h"
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#include "base/path_service.h"
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#include "base/process/process_handle.h"
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#include "base/process/process_metrics.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 "shell/common/api/electron_bindings.h"
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#include "shell/common/application_info.h"
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#include "shell/common/gin_helper/dictionary.h"
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#include "shell/common/gin_helper/microtasks_scope.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/node_util.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 "third_party/blink/public/common/web_preferences/web_preferences.h"
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#include "third_party/blink/public/web/blink.h"
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#include "third_party/blink/public/web/web_document.h"
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#include "third_party/electron_node/src/node_binding.h"
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namespace electron {
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namespace {
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const char kLifecycleKey[] = "lifecycle";
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const char kModuleCacheKey[] = "native-module-cache";
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v8::Local<v8::Object> GetModuleCache(v8::Isolate* isolate) {
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auto context = isolate->GetCurrentContext();
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gin_helper::Dictionary global(isolate, context->Global());
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v8::Local<v8::Value> cache;
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if (!global.GetHidden(kModuleCacheKey, &cache)) {
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cache = v8::Object::New(isolate);
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global.SetHidden(kModuleCacheKey, cache);
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}
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return cache->ToObject(context).ToLocalChecked();
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}
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// adapted from node.cc
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v8::Local<v8::Value> GetBinding(v8::Isolate* isolate,
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v8::Local<v8::String> key,
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gin_helper::Arguments* margs) {
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v8::Local<v8::Object> exports;
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std::string module_key = gin::V8ToString(isolate, key);
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gin_helper::Dictionary cache(isolate, GetModuleCache(isolate));
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if (cache.Get(module_key.c_str(), &exports)) {
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return exports;
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}
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auto* mod = node::binding::get_linked_module(module_key.c_str());
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if (!mod) {
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char errmsg[1024];
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snprintf(errmsg, sizeof(errmsg), "No such module: %s", module_key.c_str());
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margs->ThrowError(errmsg);
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return exports;
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}
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exports = v8::Object::New(isolate);
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DCHECK_EQ(mod->nm_register_func, nullptr);
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DCHECK_NE(mod->nm_context_register_func, nullptr);
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mod->nm_context_register_func(exports, v8::Null(isolate),
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isolate->GetCurrentContext(), mod->nm_priv);
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cache.Set(module_key.c_str(), exports);
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return exports;
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}
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v8::Local<v8::Value> CreatePreloadScript(v8::Isolate* isolate,
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v8::Local<v8::String> source) {
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auto context = isolate->GetCurrentContext();
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auto maybe_script = v8::Script::Compile(context, source);
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v8::Local<v8::Script> script;
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if (!maybe_script.ToLocal(&script))
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return v8::Local<v8::Value>();
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return script->Run(context).ToLocalChecked();
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}
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double Uptime() {
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return (base::Time::Now() - base::Process::Current().CreationTime())
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.InSecondsF();
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}
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void InvokeHiddenCallback(v8::Handle<v8::Context> context,
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const std::string& hidden_key,
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const std::string& callback_name) {
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auto* isolate = context->GetIsolate();
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auto binding_key =
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gin::ConvertToV8(isolate, hidden_key)->ToString(context).ToLocalChecked();
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auto private_binding_key = v8::Private::ForApi(isolate, binding_key);
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auto global_object = context->Global();
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v8::Local<v8::Value> value;
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if (!global_object->GetPrivate(context, private_binding_key).ToLocal(&value))
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return;
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if (value.IsEmpty() || !value->IsObject())
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return;
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auto binding = value->ToObject(context).ToLocalChecked();
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auto callback_key = gin::ConvertToV8(isolate, callback_name)
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->ToString(context)
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.ToLocalChecked();
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auto callback_value = binding->Get(context, callback_key).ToLocalChecked();
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DCHECK(callback_value->IsFunction()); // set by sandboxed_renderer/init.js
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auto callback = callback_value.As<v8::Function>();
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std::ignore = callback->Call(context, binding, 0, nullptr);
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}
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} // namespace
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ElectronSandboxedRendererClient::ElectronSandboxedRendererClient() {
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// Explicitly register electron's builtin modules.
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NodeBindings::RegisterBuiltinModules();
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metrics_ = base::ProcessMetrics::CreateCurrentProcessMetrics();
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}
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ElectronSandboxedRendererClient::~ElectronSandboxedRendererClient() = default;
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void ElectronSandboxedRendererClient::InitializeBindings(
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v8::Local<v8::Object> binding,
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v8::Local<v8::Context> context,
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content::RenderFrame* render_frame) {
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auto* isolate = context->GetIsolate();
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gin_helper::Dictionary b(isolate, binding);
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b.SetMethod("get", GetBinding);
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b.SetMethod("createPreloadScript", CreatePreloadScript);
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gin_helper::Dictionary process = gin::Dictionary::CreateEmpty(isolate);
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b.Set("process", process);
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ElectronBindings::BindProcess(isolate, &process, metrics_.get());
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BindProcess(isolate, &process, render_frame);
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process.SetMethod("uptime", Uptime);
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process.Set("argv", base::CommandLine::ForCurrentProcess()->argv());
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process.SetReadOnly("pid", base::GetCurrentProcId());
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process.SetReadOnly("sandboxed", true);
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process.SetReadOnly("type", "renderer");
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}
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void ElectronSandboxedRendererClient::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 ElectronSandboxedRendererClient::RunScriptsAtDocumentStart(
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content::RenderFrame* render_frame) {
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RendererClientBase::RunScriptsAtDocumentStart(render_frame);
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if (injected_frames_.find(render_frame) == injected_frames_.end())
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return;
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auto* isolate = blink::MainThreadIsolate();
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gin_helper::MicrotasksScope microtasks_scope(
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isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
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v8::HandleScope handle_scope(isolate);
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v8::Local<v8::Context> context =
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GetContext(render_frame->GetWebFrame(), isolate);
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v8::Context::Scope context_scope(context);
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InvokeHiddenCallback(context, kLifecycleKey, "onDocumentStart");
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}
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void ElectronSandboxedRendererClient::RunScriptsAtDocumentEnd(
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content::RenderFrame* render_frame) {
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RendererClientBase::RunScriptsAtDocumentEnd(render_frame);
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if (injected_frames_.find(render_frame) == injected_frames_.end())
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return;
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auto* isolate = blink::MainThreadIsolate();
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gin_helper::MicrotasksScope microtasks_scope(
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isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
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v8::HandleScope handle_scope(isolate);
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v8::Local<v8::Context> context =
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GetContext(render_frame->GetWebFrame(), isolate);
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v8::Context::Scope context_scope(context);
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InvokeHiddenCallback(context, kLifecycleKey, "onDocumentEnd");
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}
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void ElectronSandboxedRendererClient::DidCreateScriptContext(
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v8::Handle<v8::Context> context,
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content::RenderFrame* render_frame) {
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// Only allow preload for the main frame or
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// For devtools we still want to run the preload_bundle script
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// Or when nodeSupport is explicitly enabled in sub frames
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if (!ShouldLoadPreload(context, render_frame))
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return;
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injected_frames_.insert(render_frame);
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// Wrap the bundle into a function that receives the binding object as
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// argument.
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auto* isolate = context->GetIsolate();
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auto binding = v8::Object::New(isolate);
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InitializeBindings(binding, context, render_frame);
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std::vector<v8::Local<v8::String>> sandbox_preload_bundle_params = {
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node::FIXED_ONE_BYTE_STRING(isolate, "binding")};
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std::vector<v8::Local<v8::Value>> sandbox_preload_bundle_args = {binding};
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util::CompileAndCall(
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isolate->GetCurrentContext(), "electron/js2c/sandbox_bundle",
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&sandbox_preload_bundle_params, &sandbox_preload_bundle_args, nullptr);
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v8::HandleScope handle_scope(isolate);
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v8::Context::Scope context_scope(context);
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InvokeHiddenCallback(context, kLifecycleKey, "onLoaded");
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}
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void ElectronSandboxedRendererClient::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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auto* isolate = context->GetIsolate();
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gin_helper::MicrotasksScope microtasks_scope(
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isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
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v8::HandleScope handle_scope(isolate);
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v8::Context::Scope context_scope(context);
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InvokeHiddenCallback(context, kLifecycleKey, "onExit");
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}
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} // namespace electron
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