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electron/shell/app/electron_content_client.cc
Robo bac1c7f532
fix: ensure standard schemes are registered in nw service process (#22867) 
* fix: ensure standard schemes are registered in nw service process

Refs https://github.com/electron/electron/pull/20546

* chore: add test

* chore: apply suggestions from code review

Co-Authored-By: Jeremy Apthorp <jeremya@chromium.org>

Co-authored-by: Jeremy Apthorp <jeremya@chromium.org>
2020-03-31 19:33:16 -07:00

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// Copyright (c) 2014 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "shell/app/electron_content_client.h"
#include <string>
#include <utility>
#include <vector>
#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/path_service.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "content/public/common/content_constants.h"
#include "content/public/common/content_switches.h"
#include "electron/buildflags/buildflags.h"
#include "extensions/common/constants.h"
#include "ppapi/buildflags/buildflags.h"
#include "shell/browser/electron_paths.h"
#include "shell/common/options_switches.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "url/url_constants.h"
// In SHARED_INTERMEDIATE_DIR.
#include "widevine_cdm_version.h" // NOLINT(build/include)
#if defined(WIDEVINE_CDM_AVAILABLE)
#include "base/native_library.h"
#include "content/public/common/cdm_info.h"
#include "media/base/video_codecs.h"
#endif // defined(WIDEVINE_CDM_AVAILABLE)
#if BUILDFLAG(ENABLE_PDF_VIEWER)
#include "pdf/pdf.h" // nogncheck
#include "pdf/pdf_ppapi.h" // nogncheck
#include "shell/common/electron_constants.h"
#endif // BUILDFLAG(ENABLE_PDF_VIEWER)
#if BUILDFLAG(ENABLE_PLUGINS)
#include "content/public/browser/plugin_service.h"
#include "content/public/common/pepper_plugin_info.h"
#include "ppapi/shared_impl/ppapi_permissions.h"
#endif // BUILDFLAG(ENABLE_PLUGINS)
namespace electron {
namespace {
#if defined(WIDEVINE_CDM_AVAILABLE)
bool IsWidevineAvailable(
base::FilePath* cdm_path,
std::vector<media::VideoCodec>* codecs_supported,
base::flat_set<media::CdmSessionType>* session_types_supported,
base::flat_set<media::EncryptionMode>* modes_supported) {
static enum {
NOT_CHECKED,
FOUND,
NOT_FOUND,
} widevine_cdm_file_check = NOT_CHECKED;
if (widevine_cdm_file_check == NOT_CHECKED) {
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
*cdm_path = command_line->GetSwitchValuePath(switches::kWidevineCdmPath);
if (!cdm_path->empty()) {
*cdm_path = cdm_path->AppendASCII(
base::GetNativeLibraryName(kWidevineCdmLibraryName));
widevine_cdm_file_check = base::PathExists(*cdm_path) ? FOUND : NOT_FOUND;
}
}
if (widevine_cdm_file_check == FOUND) {
// Add the supported codecs as if they came from the component manifest.
// This list must match the CDM that is being bundled with Chrome.
codecs_supported->push_back(media::VideoCodec::kCodecVP8);
codecs_supported->push_back(media::VideoCodec::kCodecVP9);
#if BUILDFLAG(USE_PROPRIETARY_CODECS)
codecs_supported->push_back(media::VideoCodec::kCodecH264);
#endif // BUILDFLAG(USE_PROPRIETARY_CODECS)
// TODO(crbug.com/767941): Push persistent-license support info here once
// we check in a new CDM that supports it on Linux.
session_types_supported->insert(media::CdmSessionType::kTemporary);
#if defined(OS_CHROMEOS)
session_types_supported->insert(media::CdmSessionType::kPersistentLicense);
#endif // defined(OS_CHROMEOS)
modes_supported->insert(media::EncryptionMode::kCenc);
return true;
}
return false;
}
#endif // defined(WIDEVINE_CDM_AVAILABLE)
#if BUILDFLAG(ENABLE_PEPPER_FLASH)
content::PepperPluginInfo CreatePepperFlashInfo(const base::FilePath& path,
const std::string& version) {
content::PepperPluginInfo plugin;
plugin.is_out_of_process = true;
plugin.name = content::kFlashPluginName;
plugin.path = path;
plugin.permissions = ppapi::PERMISSION_ALL_BITS;
std::vector<std::string> flash_version_numbers = base::SplitString(
version, ".", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
if (flash_version_numbers.empty())
flash_version_numbers.emplace_back("11");
// |SplitString()| puts in an empty string given an empty string. :(
else if (flash_version_numbers[0].empty())
flash_version_numbers[0] = "11";
if (flash_version_numbers.size() < 2)
flash_version_numbers.emplace_back("2");
if (flash_version_numbers.size() < 3)
flash_version_numbers.emplace_back("999");
if (flash_version_numbers.size() < 4)
flash_version_numbers.emplace_back("999");
// E.g., "Shockwave Flash 10.2 r154":
plugin.description = plugin.name + " " + flash_version_numbers[0] + "." +
flash_version_numbers[1] + " r" +
flash_version_numbers[2];
plugin.version = base::JoinString(flash_version_numbers, ".");
plugin.mime_types.emplace_back(content::kFlashPluginSwfMimeType,
content::kFlashPluginSwfExtension,
content::kFlashPluginSwfDescription);
plugin.mime_types.emplace_back(content::kFlashPluginSplMimeType,
content::kFlashPluginSplExtension,
content::kFlashPluginSplDescription);
return plugin;
}
void AddPepperFlashFromCommandLine(
base::CommandLine* command_line,
std::vector<content::PepperPluginInfo>* plugins) {
base::FilePath flash_path =
command_line->GetSwitchValuePath(switches::kPpapiFlashPath);
if (flash_path.empty())
return;
auto flash_version =
command_line->GetSwitchValueASCII(switches::kPpapiFlashVersion);
plugins->push_back(CreatePepperFlashInfo(flash_path, flash_version));
}
#endif // BUILDFLAG(ENABLE_PEPPER_FLASH)
#if BUILDFLAG(ENABLE_PLUGINS)
void ComputeBuiltInPlugins(std::vector<content::PepperPluginInfo>* plugins) {
#if BUILDFLAG(ENABLE_PDF_VIEWER)
content::PepperPluginInfo pdf_info;
pdf_info.is_internal = true;
pdf_info.is_out_of_process = true;
pdf_info.name = "Chromium PDF Viewer";
pdf_info.description = "Portable Document Format";
// This isn't a real file path; it's just used as a unique identifier.
pdf_info.path = base::FilePath(kPdfPluginPath);
content::WebPluginMimeType pdf_mime_type(kPdfPluginMimeType, "pdf",
"Portable Document Format");
pdf_info.mime_types.push_back(pdf_mime_type);
pdf_info.internal_entry_points.get_interface = chrome_pdf::PPP_GetInterface;
pdf_info.internal_entry_points.initialize_module =
chrome_pdf::PPP_InitializeModule;
pdf_info.internal_entry_points.shutdown_module =
chrome_pdf::PPP_ShutdownModule;
pdf_info.permissions = ppapi::PERMISSION_PDF | ppapi::PERMISSION_DEV;
plugins->push_back(pdf_info);
// NB. in Chrome, this plugin isn't registered until the PDF extension is
// loaded. However, in Electron, we load the PDF extension unconditionally
// when it is enabled in the build, so we're OK to load the plugin eagerly
// here.
content::WebPluginInfo info;
info.type = content::WebPluginInfo::PLUGIN_TYPE_BROWSER_PLUGIN;
info.name = base::UTF8ToUTF16("Chromium PDF Viewer");
// This isn't a real file path; it's just used as a unique identifier.
info.path = base::FilePath::FromUTF8Unsafe(extension_misc::kPdfExtensionId);
info.background_color = content::WebPluginInfo::kDefaultBackgroundColor;
info.mime_types.emplace_back("application/pdf", "pdf",
"Portable Document Format");
content::PluginService::GetInstance()->RefreshPlugins();
content::PluginService::GetInstance()->RegisterInternalPlugin(info, true);
#endif // BUILDFLAG(ENABLE_PDF_VIEWER)
}
#endif // BUILDFLAG(ENABLE_PLUGINS)
void AppendDelimitedSwitchToVector(const base::StringPiece cmd_switch,
std::vector<std::string>* append_me) {
auto* command_line = base::CommandLine::ForCurrentProcess();
auto switch_value = command_line->GetSwitchValueASCII(cmd_switch);
if (!switch_value.empty()) {
constexpr base::StringPiece delimiter(",", 1);
auto tokens =
base::SplitString(switch_value, delimiter, base::TRIM_WHITESPACE,
base::SPLIT_WANT_NONEMPTY);
append_me->reserve(append_me->size() + tokens.size());
std::move(std::begin(tokens), std::end(tokens),
std::back_inserter(*append_me));
}
}
} // namespace
ElectronContentClient::ElectronContentClient() = default;
ElectronContentClient::~ElectronContentClient() = default;
base::string16 ElectronContentClient::GetLocalizedString(int message_id) {
return l10n_util::GetStringUTF16(message_id);
}
base::StringPiece ElectronContentClient::GetDataResource(
int resource_id,
ui::ScaleFactor scale_factor) {
return ui::ResourceBundle::GetSharedInstance().GetRawDataResourceForScale(
resource_id, scale_factor);
}
gfx::Image& ElectronContentClient::GetNativeImageNamed(int resource_id) {
return ui::ResourceBundle::GetSharedInstance().GetNativeImageNamed(
resource_id);
}
base::RefCountedMemory* ElectronContentClient::GetDataResourceBytes(
int resource_id) {
return ui::ResourceBundle::GetSharedInstance().LoadDataResourceBytes(
resource_id);
}
void ElectronContentClient::AddAdditionalSchemes(Schemes* schemes) {
auto* command_line = base::CommandLine::ForCurrentProcess();
std::string process_type =
command_line->GetSwitchValueASCII(::switches::kProcessType);
// Browser Process registration happens in
// `api::Protocol::RegisterSchemesAsPrivileged`
//
// Renderer Process registration happens in `RendererClientBase`
//
// We use this for registration to network utility process
if (process_type == ::switches::kUtilityProcess) {
AppendDelimitedSwitchToVector(switches::kServiceWorkerSchemes,
&schemes->service_worker_schemes);
AppendDelimitedSwitchToVector(switches::kStandardSchemes,
&schemes->standard_schemes);
AppendDelimitedSwitchToVector(switches::kSecureSchemes,
&schemes->secure_schemes);
AppendDelimitedSwitchToVector(switches::kBypassCSPSchemes,
&schemes->csp_bypassing_schemes);
AppendDelimitedSwitchToVector(switches::kCORSSchemes,
&schemes->cors_enabled_schemes);
}
schemes->service_worker_schemes.emplace_back(url::kFileScheme);
schemes->standard_schemes.emplace_back(extensions::kExtensionScheme);
}
void ElectronContentClient::AddPepperPlugins(
std::vector<content::PepperPluginInfo>* plugins) {
#if BUILDFLAG(ENABLE_PEPPER_FLASH)
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
AddPepperFlashFromCommandLine(command_line, plugins);
#endif // BUILDFLAG(ENABLE_PEPPER_FLASH)
#if BUILDFLAG(ENABLE_PLUGINS)
ComputeBuiltInPlugins(plugins);
#endif // BUILDFLAG(ENABLE_PLUGINS)
}
void ElectronContentClient::AddContentDecryptionModules(
std::vector<content::CdmInfo>* cdms,
std::vector<media::CdmHostFilePath>* cdm_host_file_paths) {
if (cdms) {
#if defined(WIDEVINE_CDM_AVAILABLE)
base::FilePath cdm_path;
std::vector<media::VideoCodec> video_codecs_supported;
base::flat_set<media::CdmSessionType> session_types_supported;
base::flat_set<media::EncryptionMode> encryption_modes_supported;
if (IsWidevineAvailable(&cdm_path, &video_codecs_supported,
&session_types_supported,
&encryption_modes_supported)) {
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
auto cdm_version_string =
command_line->GetSwitchValueASCII(switches::kWidevineCdmVersion);
// CdmInfo needs |path| to be the actual Widevine library,
// not the adapter, so adjust as necessary. It will be in the
// same directory as the installed adapter.
const base::Version version(cdm_version_string);
DCHECK(version.IsValid());
content::CdmCapability capability(
video_codecs_supported, encryption_modes_supported,
session_types_supported, base::flat_set<media::CdmProxy::Protocol>());
cdms->push_back(content::CdmInfo(
kWidevineCdmDisplayName, kWidevineCdmGuid, version, cdm_path,
kWidevineCdmFileSystemId, capability, kWidevineKeySystem, false));
}
#endif // defined(WIDEVINE_CDM_AVAILABLE)
}
}
} // namespace electron
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