/
atom_sandboxed_renderer_client.cc
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/
atom_sandboxed_renderer_client.cc
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// Copyright (c) 2016 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "atom/renderer/atom_sandboxed_renderer_client.h"
#include "atom/common/api/api_messages.h"
#include "atom/common/api/atom_bindings.h"
#include "atom/common/native_mate_converters/string16_converter.h"
#include "atom/common/native_mate_converters/value_converter.h"
#include "atom/common/node_bindings.h"
#include "atom/common/options_switches.h"
#include "atom/renderer/api/atom_api_renderer_ipc.h"
#include "atom/renderer/atom_render_frame_observer.h"
#include "base/base_paths.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/path_service.h"
#include "chrome/renderer/printing/print_web_view_helper.h"
#include "content/public/renderer/render_frame.h"
#include "native_mate/dictionary.h"
#include "third_party/WebKit/public/web/WebDocument.h"
#include "third_party/WebKit/public/web/WebKit.h"
#include "atom/common/node_includes.h"
#include "atom_natives.h" // NOLINT: This file is generated with js2c
namespace atom {
namespace {
const std::string kIpcKey = "ipcNative";
const std::string kModuleCacheKey = "native-module-cache";
bool IsDevTools(content::RenderFrame* render_frame) {
return render_frame->GetWebFrame()->GetDocument().Url().ProtocolIs(
"chrome-devtools");
}
v8::Local<v8::Object> GetModuleCache(v8::Isolate* isolate) {
mate::Dictionary global(isolate, isolate->GetCurrentContext()->Global());
v8::Local<v8::Value> cache;
if (!global.GetHidden(kModuleCacheKey, &cache)) {
cache = v8::Object::New(isolate);
global.SetHidden(kModuleCacheKey, cache);
}
return cache->ToObject();
}
// adapted from node.cc
v8::Local<v8::Value> GetBinding(v8::Isolate* isolate,
v8::Local<v8::String> key,
mate::Arguments* margs) {
v8::Local<v8::Object> exports;
std::string module_key = mate::V8ToString(key);
mate::Dictionary cache(isolate, GetModuleCache(isolate));
if (cache.Get(module_key.c_str(), &exports)) {
return exports;
}
auto* mod = node::get_builtin_module(module_key.c_str());
if (!mod) {
char errmsg[1024];
snprintf(errmsg, sizeof(errmsg), "No such module: %s", module_key.c_str());
margs->ThrowError(errmsg);
return exports;
}
exports = v8::Object::New(isolate);
DCHECK_EQ(mod->nm_register_func, nullptr);
DCHECK_NE(mod->nm_context_register_func, nullptr);
mod->nm_context_register_func(exports, v8::Null(isolate),
isolate->GetCurrentContext(), mod->nm_priv);
cache.Set(module_key.c_str(), exports);
return exports;
}
base::CommandLine::StringVector GetArgv() {
return base::CommandLine::ForCurrentProcess()->argv();
}
base::FilePath::StringType GetExecPath() {
base::FilePath path;
PathService::Get(base::FILE_EXE, &path);
return path.value();
}
void InitializeBindings(v8::Local<v8::Object> binding,
v8::Local<v8::Context> context) {
auto* isolate = context->GetIsolate();
mate::Dictionary b(isolate, binding);
b.SetMethod("get", GetBinding);
b.SetMethod("crash", AtomBindings::Crash);
b.SetMethod("hang", AtomBindings::Hang);
b.SetMethod("getArgv", GetArgv);
b.SetMethod("getExecPath", GetExecPath);
b.SetMethod("getHeapStatistics", &AtomBindings::GetHeapStatistics);
b.SetMethod("getProcessMemoryInfo", &AtomBindings::GetProcessMemoryInfo);
b.SetMethod("getSystemMemoryInfo", &AtomBindings::GetSystemMemoryInfo);
// Pass in CLI flags needed to setup the renderer
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(switches::kGuestInstanceID))
b.Set(options::kGuestInstanceID,
command_line->GetSwitchValueASCII(switches::kGuestInstanceID));
}
class AtomSandboxedRenderFrameObserver : public AtomRenderFrameObserver {
public:
AtomSandboxedRenderFrameObserver(content::RenderFrame* render_frame,
AtomSandboxedRendererClient* renderer_client)
: AtomRenderFrameObserver(render_frame, renderer_client),
renderer_client_(renderer_client) {}
protected:
void EmitIPCEvent(blink::WebLocalFrame* frame,
const base::string16& channel,
const base::ListValue& args) override {
if (!frame)
return;
auto* isolate = blink::MainThreadIsolate();
v8::HandleScope handle_scope(isolate);
auto context = renderer_client_->GetContext(frame, isolate);
v8::Context::Scope context_scope(context);
v8::Local<v8::Value> argv[] = {mate::ConvertToV8(isolate, channel),
mate::ConvertToV8(isolate, args)};
renderer_client_->InvokeIpcCallback(
context, "onMessage",
std::vector<v8::Local<v8::Value>>(argv, argv + node::arraysize(argv)));
}
private:
AtomSandboxedRendererClient* renderer_client_;
DISALLOW_COPY_AND_ASSIGN(AtomSandboxedRenderFrameObserver);
};
} // namespace
AtomSandboxedRendererClient::AtomSandboxedRendererClient() {
// Explicitly register electron's builtin modules.
NodeBindings::RegisterBuiltinModules();
}
AtomSandboxedRendererClient::~AtomSandboxedRendererClient() {}
void AtomSandboxedRendererClient::RenderFrameCreated(
content::RenderFrame* render_frame) {
new AtomSandboxedRenderFrameObserver(render_frame, this);
RendererClientBase::RenderFrameCreated(render_frame);
}
void AtomSandboxedRendererClient::RenderViewCreated(
content::RenderView* render_view) {
RendererClientBase::RenderViewCreated(render_view);
}
void AtomSandboxedRendererClient::DidCreateScriptContext(
v8::Handle<v8::Context> context,
content::RenderFrame* render_frame) {
RendererClientBase::DidCreateScriptContext(context, render_frame);
// Only allow preload for the main frame or
// For devtools we still want to run the preload_bundle script
if (!render_frame->IsMainFrame() && !IsDevTools(render_frame))
return;
auto* isolate = context->GetIsolate();
v8::HandleScope handle_scope(isolate);
v8::Context::Scope context_scope(context);
// Wrap the bundle into a function that receives the binding object and the
// preload script path as arguments.
std::string left = "(function(binding, require) {\n";
std::string right = "\n})";
// Compile the wrapper and run it to get the function object
auto script = v8::Script::Compile(v8::String::Concat(
mate::ConvertToV8(isolate, left)->ToString(),
v8::String::Concat(node::preload_bundle_value.ToStringChecked(isolate),
mate::ConvertToV8(isolate, right)->ToString())));
auto func =
v8::Handle<v8::Function>::Cast(script->Run(context).ToLocalChecked());
// Create and initialize the binding object
auto binding = v8::Object::New(isolate);
InitializeBindings(binding, context);
AddRenderBindings(isolate, binding);
v8::Local<v8::Value> args[] = {binding};
// Execute the function with proper arguments
ignore_result(
func->Call(context, v8::Null(isolate), node::arraysize(args), args));
InvokeIpcCallback(context, "onLoaded", std::vector<v8::Local<v8::Value>>());
}
void AtomSandboxedRendererClient::WillReleaseScriptContext(
v8::Handle<v8::Context> context,
content::RenderFrame* render_frame) {
// Only allow preload for the main frame
if (!render_frame->IsMainFrame())
return;
auto* isolate = context->GetIsolate();
v8::HandleScope handle_scope(isolate);
v8::Context::Scope context_scope(context);
InvokeIpcCallback(context, "onExit", std::vector<v8::Local<v8::Value>>());
}
void AtomSandboxedRendererClient::InvokeIpcCallback(
v8::Handle<v8::Context> context,
const std::string& callback_name,
std::vector<v8::Handle<v8::Value>> args) {
auto* isolate = context->GetIsolate();
auto binding_key = mate::ConvertToV8(isolate, kIpcKey)->ToString();
auto private_binding_key = v8::Private::ForApi(isolate, binding_key);
auto global_object = context->Global();
v8::Local<v8::Value> value;
if (!global_object->GetPrivate(context, private_binding_key).ToLocal(&value))
return;
if (value.IsEmpty() || !value->IsObject())
return;
auto binding = value->ToObject();
auto callback_key = mate::ConvertToV8(isolate, callback_name)->ToString();
auto callback_value = binding->Get(callback_key);
DCHECK(callback_value->IsFunction()); // set by sandboxed_renderer/init.js
auto callback = v8::Handle<v8::Function>::Cast(callback_value);
ignore_result(callback->Call(context, binding, args.size(), args.data()));
}
} // namespace atom