content/shell/renderer/shell_content_renderer_client.cc

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/shell/renderer/shell_content_renderer_client.h"

#include <string>

#include "base/bind.h"
#include "base/check_op.h"
#include "base/command_line.h"
#include "base/notreached.h"
#include "base/strings/string_number_conversions.h"
#include "components/cdm/renderer/external_clear_key_key_system_properties.h"
#include "components/web_cache/renderer/web_cache_impl.h"
#include "content/public/test/test_service.mojom.h"
#include "content/shell/common/power_monitor_test_impl.h"
#include "content/shell/common/shell_switches.h"
#include "content/shell/renderer/shell_render_frame_observer.h"
#include "mojo/public/cpp/bindings/binder_map.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/system/message_pipe.h"
#include "net/base/net_errors.h"
#include "ppapi/buildflags/buildflags.h"
#include "sandbox/policy/sandbox.h"
#include "third_party/blink/public/platform/web_url_error.h"
#include "third_party/blink/public/web/web_testing_support.h"
#include "third_party/blink/public/web/web_view.h"
#include "v8/include/v8.h"

#if BUILDFLAG(ENABLE_PLUGINS)
#include "ppapi/shared_impl/ppapi_switches.h"  // nogncheck
#endif

#if BUILDFLAG(ENABLE_MOJO_CDM)
#include "base/feature_list.h"
#include "media/base/media_switches.h"
#endif

namespace content {

namespace {

// A test service which can be driven by browser tests for various reasons.
class TestRendererServiceImpl : public mojom::TestService {
 public:
  explicit TestRendererServiceImpl(
      mojo::PendingReceiver<mojom::TestService> receiver)
      : receiver_(this, std::move(receiver)) {
    receiver_.set_disconnect_handler(base::BindOnce(
        &TestRendererServiceImpl::OnConnectionError, base::Unretained(this)));
  }

  TestRendererServiceImpl(const TestRendererServiceImpl&) = delete;
  TestRendererServiceImpl& operator=(const TestRendererServiceImpl&) = delete;

  ~TestRendererServiceImpl() override {}

 private:
  void OnConnectionError() { delete this; }

  // mojom::TestService:
  void DoSomething(DoSomethingCallback callback) override {
    // Instead of responding normally, unbind the pipe, write some garbage,
    // and go away.
    const std::string kBadMessage = "This is definitely not a valid response!";
    mojo::ScopedMessagePipeHandle pipe = receiver_.Unbind().PassPipe();
    MojoResult rv = mojo::WriteMessageRaw(
        pipe.get(), kBadMessage.data(), kBadMessage.size(), nullptr, 0,
        MOJO_WRITE_MESSAGE_FLAG_NONE);
    DCHECK_EQ(rv, MOJO_RESULT_OK);

    // Deletes this.
    OnConnectionError();
  }

  void DoTerminateProcess(DoTerminateProcessCallback callback) override {
    NOTREACHED();
  }

  void DoCrashImmediately(DoCrashImmediatelyCallback callback) override {
    NOTREACHED();
  }

  void CreateFolder(CreateFolderCallback callback) override { NOTREACHED(); }

  void GetRequestorName(GetRequestorNameCallback callback) override {
    std::move(callback).Run("Not implemented.");
  }

  void CreateReadOnlySharedMemoryRegion(
      const std::string& message,
      CreateReadOnlySharedMemoryRegionCallback callback) override {
    NOTREACHED();
  }

  void CreateWritableSharedMemoryRegion(
      const std::string& message,
      CreateWritableSharedMemoryRegionCallback callback) override {
    NOTREACHED();
  }

  void CreateUnsafeSharedMemoryRegion(
      const std::string& message,
      CreateUnsafeSharedMemoryRegionCallback callback) override {
    NOTREACHED();
  }

  void IsProcessSandboxed(IsProcessSandboxedCallback callback) override {
    std::move(callback).Run(sandbox::policy::Sandbox::IsProcessSandboxed());
  }

  mojo::Receiver<mojom::TestService> receiver_;
};

void CreateRendererTestService(
    mojo::PendingReceiver<mojom::TestService> receiver) {
  // Owns itself.
  new TestRendererServiceImpl(std::move(receiver));
}

}  // namespace

ShellContentRendererClient::ShellContentRendererClient() {}

ShellContentRendererClient::~ShellContentRendererClient() {
}

void ShellContentRendererClient::RenderThreadStarted() {
  web_cache_impl_ = std::make_unique<web_cache::WebCacheImpl>();
}

void ShellContentRendererClient::ExposeInterfacesToBrowser(
    mojo::BinderMap* binders) {
  binders->Add(base::BindRepeating(&CreateRendererTestService),
               base::ThreadTaskRunnerHandle::Get());
  binders->Add(
      base::BindRepeating(&PowerMonitorTestImpl::MakeSelfOwnedReceiver),
      base::ThreadTaskRunnerHandle::Get());
  binders->Add(base::BindRepeating(&web_cache::WebCacheImpl::BindReceiver,
                                   base::Unretained(web_cache_impl_.get())),
               base::ThreadTaskRunnerHandle::Get());
}

void ShellContentRendererClient::RenderFrameCreated(RenderFrame* render_frame) {
  // TODO(danakj): The ShellRenderFrameObserver is doing stuff only for
  // browser tests. If we only create that for browser tests then the override
  // of this method in WebTestContentRendererClient would not be needed.
  new ShellRenderFrameObserver(render_frame);
}

void ShellContentRendererClient::PrepareErrorPage(
    RenderFrame* render_frame,
    const blink::WebURLError& error,
    const std::string& http_method,
    content::mojom::AlternativeErrorPageOverrideInfoPtr
        alternative_error_page_info,
    std::string* error_html) {
  if (error_html && error_html->empty()) {
    *error_html =
        "<head><title>Error</title></head><body>Could not load the requested "
        "resource.<br/>Error code: " +
        base::NumberToString(error.reason()) +
        (error.reason() < 0 ? " (" + net::ErrorToString(error.reason()) + ")"
                            : "") +
        "</body>";
  }
}

void ShellContentRendererClient::PrepareErrorPageForHttpStatusError(
    content::RenderFrame* render_frame,
    const blink::WebURLError& error,
    const std::string& http_method,
    int http_status,
    content::mojom::AlternativeErrorPageOverrideInfoPtr
        alternative_error_page_info,
    std::string* error_html) {
  if (error_html) {
    *error_html =
        "<head><title>Error</title></head><body>Server returned HTTP status " +
        base::NumberToString(http_status) + "</body>";
  }
}

void ShellContentRendererClient::DidInitializeWorkerContextOnWorkerThread(
    v8::Local<v8::Context> context) {
  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
          switches::kExposeInternalsForTesting)) {
    blink::WebTestingSupport::InjectInternalsObject(context);
  }
}

#if BUILDFLAG(ENABLE_MOJO_CDM)
void ShellContentRendererClient::GetSupportedKeySystems(
    media::GetSupportedKeySystemsCB cb) {
  media::KeySystemPropertiesVector key_systems;
  if (base::FeatureList::IsEnabled(media::kExternalClearKeyForTesting))
    key_systems.push_back(std::make_unique<cdm::ExternalClearKeyProperties>());
  std::move(cb).Run(std::move(key_systems));
}
#endif

}  // namespace content