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// Copyright 2014 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/public/common/user_agent.h"
#include <stdint.h>
#include "base/strings/strcat.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/system/sys_info.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "build/util/webkit_version.h"
#if defined(OS_MAC)
#include "base/mac/mac_util.h"
#endif
#if defined(OS_WIN)
#include "base/win/windows_version.h"
#elif defined(OS_POSIX) && !defined(OS_MAC)
#include <sys/utsname.h>
#endif
namespace content {
namespace {
std::string GetUserAgentPlatform() {
#if defined(OS_WIN)
return "";
#elif defined(OS_MAC)
return "Macintosh; ";
#elif defined(USE_X11) || defined(USE_OZONE)
return "X11; "; // strange, but that's what Firefox uses
#elif defined(OS_ANDROID)
return "Linux; ";
#elif defined(OS_FUCHSIA)
// TODO(https://crbug.com/1010256): Sites get confused into serving mobile
// content if we report only "Fuchsia".
return "X11; ";
#elif defined(OS_POSIX)
return "Unknown; ";
#endif
}
} // namespace
std::string GetWebKitVersion() {
return base::StringPrintf("%d.%d (%s)",
WEBKIT_VERSION_MAJOR,
WEBKIT_VERSION_MINOR,
WEBKIT_SVN_REVISION);
}
std::string GetWebKitRevision() {
return WEBKIT_SVN_REVISION;
}
std::string BuildCpuInfo() {
std::string cpuinfo;
#if defined(OS_MAC)
cpuinfo = "Intel";
#elif defined(OS_WIN)
base::win::OSInfo* os_info = base::win::OSInfo::GetInstance();
if (os_info->wow64_status() == base::win::OSInfo::WOW64_ENABLED) {
cpuinfo = "WOW64";
} else {
base::win::OSInfo::WindowsArchitecture windows_architecture =
os_info->GetArchitecture();
if (windows_architecture == base::win::OSInfo::X64_ARCHITECTURE)
cpuinfo = "Win64; x64";
else if (windows_architecture == base::win::OSInfo::IA64_ARCHITECTURE)
cpuinfo = "Win64; IA64";
}
#elif defined(OS_POSIX) && !defined(OS_MAC)
// Should work on any Posix system.
struct utsname unixinfo;
uname(&unixinfo);
// special case for biarch systems
if (strcmp(unixinfo.machine, "x86_64") == 0 &&
sizeof(void*) == sizeof(int32_t)) {
cpuinfo.assign("i686 (x86_64)");
} else {
cpuinfo.assign(unixinfo.machine);
}
#endif
return cpuinfo;
}
// Return the CPU architecture in Windows/Mac/POSIX and the empty string
// elsewhere.
std::string GetLowEntropyCpuArchitecture() {
#if defined(OS_WIN)
base::win::OSInfo::WindowsArchitecture windows_architecture =
base::win::OSInfo::GetInstance()->GetArchitecture();
if (windows_architecture == base::win::OSInfo::ARM64_ARCHITECTURE) {
return "arm";
} else if ((windows_architecture == base::win::OSInfo::X86_ARCHITECTURE) ||
(windows_architecture == base::win::OSInfo::X64_ARCHITECTURE)) {
return "x86";
}
#elif defined(OS_MAC)
base::mac::CPUType cpu_type = base::mac::GetCPUType();
if (cpu_type == base::mac::CPUType::kIntel) {
return "x86";
} else if (cpu_type == base::mac::CPUType::kArm ||
cpu_type == base::mac::CPUType::kTranslatedIntel) {
return "arm";
}
#elif defined(OS_POSIX) && !defined(OS_ANDROID)
// This extra cpu_info_str variable is required to make sure the compiler
// doesn't optimize the copy away and have the StringPiece point at the
// internal std::string, resulting in a memory violation.
std::string cpu_info_str = BuildCpuInfo();
base::StringPiece cpu_info = cpu_info_str;
if (base::StartsWith(cpu_info, "arm") ||
base::StartsWith(cpu_info, "aarch")) {
return "arm";
} else if ((base::StartsWith(cpu_info, "i") &&
cpu_info.substr(2, 2) == "86") ||
base::StartsWith(cpu_info, "x86")) {
return "x86";
}
#endif
return std::string();
}
std::string GetOSVersion(IncludeAndroidBuildNumber include_android_build_number,
IncludeAndroidModel include_android_model) {
std::string os_version;
#if defined(OS_WIN) || defined(OS_MAC) || defined(OS_CHROMEOS) || \
BUILDFLAG(IS_LACROS)
int32_t os_major_version = 0;
int32_t os_minor_version = 0;
int32_t os_bugfix_version = 0;
base::SysInfo::OperatingSystemVersionNumbers(
&os_major_version, &os_minor_version, &os_bugfix_version);
#endif
#if defined(OS_ANDROID)
std::string android_version_str = base::SysInfo::OperatingSystemVersion();
std::string android_info_str =
GetAndroidOSInfo(include_android_build_number, include_android_model);
#endif
base::StringAppendF(&os_version,
#if defined(OS_WIN)
"%d.%d", os_major_version, os_minor_version
#elif defined(OS_MAC)
"%d_%d_%d", os_major_version, os_minor_version,
os_bugfix_version
#elif defined(OS_CHROMEOS) || BUILDFLAG(IS_LACROS)
"%d.%d.%d", os_major_version, os_minor_version,
os_bugfix_version
#elif defined(OS_ANDROID)
"%s%s", android_version_str.c_str(),
android_info_str.c_str()
#else
""
#endif
);
return os_version;
}
std::string BuildOSCpuInfo(
IncludeAndroidBuildNumber include_android_build_number,
IncludeAndroidModel include_android_model) {
return BuildOSCpuInfoFromOSVersionAndCpuType(
GetOSVersion(include_android_build_number, include_android_model),
BuildCpuInfo());
}
std::string BuildOSCpuInfoFromOSVersionAndCpuType(const std::string& os_version,
const std::string& cpu_type) {
std::string os_cpu;
#if !defined(OS_ANDROID) && defined(OS_POSIX) && !defined(OS_MAC)
// Should work on any Posix system.
struct utsname unixinfo;
uname(&unixinfo);
#endif
#if defined(OS_WIN)
if (!cpu_type.empty())
base::StringAppendF(&os_cpu, "Windows NT %s; %s", os_version.c_str(),
cpu_type.c_str());
else
base::StringAppendF(&os_cpu, "Windows NT %s", os_version.c_str());
#else
base::StringAppendF(&os_cpu,
#if defined(OS_MAC)
"%s Mac OS X %s", cpu_type.c_str(), os_version.c_str()
#elif defined(OS_CHROMEOS) || BUILDFLAG(IS_LACROS)
"CrOS "
"%s %s",
cpu_type.c_str(), // e.g. i686
os_version.c_str()
#elif defined(OS_ANDROID)
"Android %s", os_version.c_str()
#elif defined(OS_FUCHSIA)
"Fuchsia"
#elif defined(OS_POSIX)
"%s %s",
unixinfo.sysname, // e.g. Linux
cpu_type.c_str() // e.g. i686
#endif
);
#endif
return os_cpu;
}
std::string GetFrozenUserAgent(bool mobile, std::string major_version) {
std::string user_agent;
#if defined(OS_ANDROID)
user_agent = mobile ? frozen_user_agent_strings::kAndroidMobile
: frozen_user_agent_strings::kAndroid;
#else
user_agent = frozen_user_agent_strings::kDesktop;
#endif
return base::StringPrintf(user_agent.c_str(), major_version.c_str());
}
std::string BuildUserAgentFromProduct(const std::string& product) {
std::string os_info;
base::StringAppendF(&os_info, "%s%s", GetUserAgentPlatform().c_str(),
BuildOSCpuInfo(IncludeAndroidBuildNumber::Exclude,
IncludeAndroidModel::Include)
.c_str());
return BuildUserAgentFromOSAndProduct(os_info, product);
}
std::string BuildModelInfo() {
std::string model;
#if defined(OS_ANDROID)
// Only send the model information if on the release build of Android,
// matching user agent behaviour.
if (base::SysInfo::GetAndroidBuildCodename() == "REL")
model = base::SysInfo::HardwareModelName();
#endif
return model;
}
#if defined(OS_ANDROID)
std::string BuildUserAgentFromProductAndExtraOSInfo(
const std::string& product,
const std::string& extra_os_info,
IncludeAndroidBuildNumber include_android_build_number) {
std::string os_info;
base::StrAppend(&os_info, {GetUserAgentPlatform(),
BuildOSCpuInfo(include_android_build_number,
IncludeAndroidModel::Include),
extra_os_info});
return BuildUserAgentFromOSAndProduct(os_info, product);
}
std::string GetAndroidOSInfo(
IncludeAndroidBuildNumber include_android_build_number,
IncludeAndroidModel include_android_model) {
std::string android_info_str;
// Send information about the device.
bool semicolon_inserted = false;
if (include_android_model == IncludeAndroidModel::Include) {
std::string android_device_name = BuildModelInfo();
if (!android_device_name.empty()) {
android_info_str += "; " + android_device_name;
semicolon_inserted = true;
}
}
// Append the build ID.
if (include_android_build_number == IncludeAndroidBuildNumber::Include) {
std::string android_build_id = base::SysInfo::GetAndroidBuildID();
if (!android_build_id.empty()) {
if (!semicolon_inserted)
android_info_str += ";";
android_info_str += " Build/" + android_build_id;
}
}
return android_info_str;
}
#endif // defined(OS_ANDROID)
std::string BuildUserAgentFromOSAndProduct(const std::string& os_info,
const std::string& product) {
// Derived from Safari's UA string.
// This is done to expose our product name in a manner that is maximally
// compatible with Safari, we hope!!
std::string user_agent;
base::StringAppendF(
&user_agent,
"Mozilla/5.0 (%s) AppleWebKit/%d.%d (KHTML, like Gecko) %s Safari/%d.%d",
os_info.c_str(),
WEBKIT_VERSION_MAJOR,
WEBKIT_VERSION_MINOR,
product.c_str(),
WEBKIT_VERSION_MAJOR,
WEBKIT_VERSION_MINOR);
return user_agent;
}
} // namespace content
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