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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/headless/headless_mode_util.h"
#include "build/build_config.h"
#include "ui/gfx/switches.h"
// New headless mode is available on Linux, Windows and Mac platforms.
// More platforms will be added later, so avoid function level clutter
// by providing stub implementations at the end of the file.
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_WIN) || BUILDFLAG(IS_MAC)
#include "base/base_switches.h"
#include "base/files/file_path.h"
#include "base/files/scoped_temp_dir.h"
#include "chrome/browser/headless/headless_mode_switches.h"
#include "chrome/common/chrome_switches.h"
#include "content/public/common/content_switches.h"
#if BUILDFLAG(IS_LINUX)
#include "ui/gl/gl_switches.h" // nogncheck
#include "ui/ozone/public/ozone_switches.h" // nogncheck
#endif // BUILDFLAG(IS_LINUX)
#if BUILDFLAG(IS_WIN)
#include "chrome/chrome_elf/chrome_elf_main.h"
#endif // BUILDFLAG(IS_WIN)
namespace headless {
namespace {
const char kNewHeadlessModeSwitchValue[] = "new";
const char kOldHeadlessModeSwitchValue[] = "old";
enum HeadlessMode {
kNoHeadlessMode,
kOldHeadlessMode,
kNewHeadlessMode,
kDefaultHeadlessMode = kNewHeadlessMode
};
HeadlessMode GetHeadlessMode() {
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
if (!command_line->HasSwitch(switches::kHeadless))
return kNoHeadlessMode;
std::string switch_value =
command_line->GetSwitchValueASCII(switches::kHeadless);
if (switch_value == kOldHeadlessModeSwitchValue)
return kOldHeadlessMode;
if (switch_value == kNewHeadlessModeSwitchValue)
return kNewHeadlessMode;
return kDefaultHeadlessMode;
}
class HeadlessModeHandleImpl : public HeadlessModeHandle {
public:
HeadlessModeHandleImpl() { SetUpCommandLine(); }
~HeadlessModeHandleImpl() override = default;
private:
void SetUpCommandLine() {
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
// Default to incognito mode unless it is forced or user data directory is
// explicitly specified.
if (!command_line->HasSwitch(::switches::kIncognito) &&
!command_line->HasSwitch(::switches::kUserDataDir)) {
command_line->AppendSwitch(::switches::kIncognito);
}
// Enable unattended mode.
if (!command_line->HasSwitch(::switches::kNoErrorDialogs)) {
command_line->AppendSwitch(::switches::kNoErrorDialogs);
}
// Disable first run user experience.
if (!command_line->HasSwitch(::switches::kNoFirstRun)) {
command_line->AppendSwitch(::switches::kNoFirstRun);
}
// Excplicitely specify unique user data dir because if there is no one
// provided, Chrome will fall back to the default one which will prevent
// parallel headless processes execution, see https://crbug.com/1477376.
if (!command_line->HasSwitch(::switches::kUserDataDir) &&
!command_line->HasSwitch(::switches::kProcessType)) {
const base::FilePath& user_data_dir = GetUserDataDir();
if (!user_data_dir.empty()) {
command_line->AppendSwitchPath(switches::kUserDataDir, user_data_dir);
}
}
#if BUILDFLAG(IS_LINUX)
// Headless mode on Linux relies on ozone/headless platform.
command_line->AppendSwitchASCII(::switches::kOzonePlatform,
switches::kHeadless);
if (!command_line->HasSwitch(switches::kScreenInfo) &&
!command_line->HasSwitch(switches::kOzoneOverrideScreenSize)) {
command_line->AppendSwitchASCII(switches::kOzoneOverrideScreenSize,
"800,600");
}
// If Ozone/Headless is enabled, Vulkan initialization crashes unless
// Angle implementation is specified explicitly.
if (!command_line->HasSwitch(switches::kUseGL) &&
!command_line->HasSwitch(switches::kUseANGLE) &&
!command_line->HasSwitch(switches::kEnableGPU)) {
command_line->AppendSwitchASCII(
switches::kUseANGLE, gl::kANGLEImplementationSwiftShaderForWebGLName);
}
#endif // BUILDFLAG(IS_LINUX)
}
const base::FilePath& GetUserDataDir() {
if (!user_data_dir_.IsValid()) {
#if BUILDFLAG(IS_WIN)
// On Windows user data dir is handled before chrome.dll is loaded in
// chrome_elf, see chrome/install_static/user_data_dir.h/cc, so check to
// see if the temporary data dir for headless mode was created there and
// if so, associate it with our code for cleanup on exit.
if (IsTemporaryUserDataDirectoryCreatedForHeadless()) {
wchar_t user_data_dir_buf[MAX_PATH],
invalid_user_data_dir_buf[MAX_PATH];
if (GetUserDataDirectoryThunk(user_data_dir_buf,
std::size(user_data_dir_buf),
invalid_user_data_dir_buf,
std::size(invalid_user_data_dir_buf))) {
base::FilePath user_data_dir(user_data_dir_buf);
if (!user_data_dir.empty()) {
CHECK(user_data_dir_.Set(user_data_dir));
}
}
}
#else // BUILDFLAG(IS_WIN)
CHECK(user_data_dir_.CreateUniqueTempDir());
#endif // BUILDFLAG(IS_WIN)
}
return user_data_dir_.GetPath();
}
base::ScopedTempDir user_data_dir_;
};
} // namespace
bool IsHeadlessMode() {
return GetHeadlessMode() == kNewHeadlessMode;
}
bool IsOldHeadlessMode() {
return GetHeadlessMode() == kOldHeadlessMode;
}
bool IsChromeSchemeUrlAllowed() {
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
return command_line->HasSwitch(switches::kAllowChromeSchemeUrl);
}
std::unique_ptr<HeadlessModeHandle> InitHeadlessMode() {
CHECK(IsHeadlessMode());
return std::make_unique<HeadlessModeHandleImpl>();
}
} // namespace headless
#else // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_WIN) || BUILDFLAG(IS_MAC)
namespace headless {
bool IsHeadlessMode() {
return false;
}
bool IsOldHeadlessMode() {
// In addition to Linux, Windows and Mac (which are handled above),
// the old headless mode is also supported on ChromeOS, see chrome_main.cc.
#if BUILDFLAG(IS_CHROMEOS)
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
return command_line->HasSwitch(switches::kHeadless);
#else
return false;
#endif
}
bool IsChromeSchemeUrlAllowed() {
return false;
}
void SetUpCommandLine(const base::CommandLine* command_line) {}
std::unique_ptr<HeadlessModeHandle> InitHeadlessMode() {
return nullptr;
}
} // namespace headless
#endif // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_WIN) || BUILDFLAG(IS_MAC)
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