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// Copyright 2020 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 "weblayer/browser/profile_disk_operations.h"
#include "base/files/file_enumerator.h"
#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/path_service.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "build/build_config.h"
#include "components/base32/base32.h"
#include "weblayer/common/weblayer_paths.h"
namespace weblayer {
// Variables named |name| is a string passed in from the embedder to identify a
// profile. It can only contain alphanumeric and underscore.
//
// Variables named |dir_name| generally refers to the directory name of the
// profile. It may be the |name| exactly, or it may be <name>.<number>, if a
// profile is created with a name matching a profile marked for deletion.
// |dir_name| is an implementation detail of this file and should not be exposed
// as a concept out of this file.
namespace {
// Cannot be part of a valid name. This prevents the client ever specifying a
// name that collides a different one with a suffix.
constexpr char kSuffixDelimiter = '.';
bool IsValidProfileNameChar(char c) {
return base::IsAsciiDigit(c) || base::IsAsciiAlpha(c) || c == '_';
}
// Return the data path directory to profiles.
base::FilePath GetProfileRootDataDir() {
base::FilePath path;
CHECK(base::PathService::Get(DIR_USER_DATA, &path));
return path.AppendASCII("profiles");
}
base::FilePath GetProfileMarkerRootDataDir() {
base::FilePath path;
CHECK(base::PathService::Get(DIR_USER_DATA, &path));
path = path.AppendASCII("profiles_to_delete");
base::CreateDirectory(path);
return path;
}
base::FilePath GetDataPathFromDirName(const std::string& dir_name) {
return GetProfileRootDataDir().AppendASCII(dir_name.c_str());
}
#if defined(OS_POSIX)
base::FilePath GetCachePathFromDirName(const std::string& dir_name) {
base::FilePath cache_path;
CHECK(base::PathService::Get(base::DIR_CACHE, &cache_path));
cache_path = cache_path.AppendASCII("profiles").AppendASCII(dir_name.c_str());
return cache_path;
}
#endif // OS_POSIX
} // namespace
ProfileInfo::ProfileInfo(bool is_incognito,
const std::string& name,
const base::FilePath& data_path,
const base::FilePath& cache_path)
: is_incognito(is_incognito),
name(name),
data_path(data_path),
cache_path(cache_path) {}
ProfileInfo::ProfileInfo() = default;
ProfileInfo::ProfileInfo(const ProfileInfo&) = default;
ProfileInfo& ProfileInfo::operator=(const ProfileInfo&) = default;
ProfileInfo::~ProfileInfo() = default;
ProfileInfo CreateProfileInfo(const std::string& name, bool is_incognito) {
if (is_incognito)
return {is_incognito, name, base::FilePath(), base::FilePath()};
CHECK(internal::IsValidNameForNonIncognitoProfile(name));
std::string dir_name = name;
int suffix = 0;
while (internal::IsProfileMarkedForDeletion(dir_name)) {
suffix++;
dir_name = name;
dir_name.append(1, kSuffixDelimiter).append(base::NumberToString(suffix));
}
base::FilePath data_path = GetDataPathFromDirName(dir_name);
base::CreateDirectory(data_path);
base::FilePath cache_path = data_path;
#if defined(OS_POSIX)
cache_path = GetCachePathFromDirName(dir_name);
base::CreateDirectory(cache_path);
#endif
return {is_incognito, name, data_path, cache_path};
}
base::FilePath ComputeBrowserPersisterDataBaseDir(const ProfileInfo& info) {
base::FilePath base_path;
if (info.is_incognito) {
CHECK(base::PathService::Get(DIR_USER_DATA, &base_path));
if (info.name.empty()) {
// Originally the Android side of WebLayer only supported a single
// incognito file with an empty name.
std::string file_name = "Incognito Restore Data";
base_path = base_path.AppendASCII(file_name);
} else {
std::string file_name = "Named Profile Incognito Restore Data";
base_path = base_path.AppendASCII(file_name).AppendASCII(
base32::Base32Encode(info.name));
}
} else {
base_path = info.data_path.AppendASCII("Restore Data");
}
return base_path;
}
void MarkProfileAsDeleted(const ProfileInfo& info) {
if (info.is_incognito)
return;
base::FilePath data_root_path = GetProfileRootDataDir();
base::FilePath marker_path = GetProfileMarkerRootDataDir();
CHECK(data_root_path.AppendRelativePath(info.data_path, &marker_path));
base::File file(marker_path,
base::File::FLAG_CREATE | base::File::FLAG_WRITE);
if (!base::PathExists(marker_path)) {
LOG(WARNING) << "Failure in deleting profile data. Profile:" << info.name
<< " error:" << static_cast<int>(file.error_details());
}
}
void TryNukeProfileFromDisk(const ProfileInfo& info) {
if (info.is_incognito) {
// Incognito. Just delete session data.
base::DeletePathRecursively(ComputeBrowserPersisterDataBaseDir(info));
return;
}
// This may fail, but that is ok since the marker is not deleted.
base::DeletePathRecursively(info.data_path);
#if defined(OS_POSIX)
base::DeletePathRecursively(info.cache_path);
#endif
}
std::vector<std::string> ListProfileNames() {
base::FilePath root_dir = GetProfileRootDataDir();
std::vector<std::string> profile_names;
base::FileEnumerator enumerator(root_dir, /*recursive=*/false,
base::FileEnumerator::DIRECTORIES);
for (base::FilePath path = enumerator.Next(); !path.empty();
path = enumerator.Next()) {
std::string dir_name = enumerator.GetInfo().GetName().MaybeAsASCII();
std::string name = internal::CheckDirNameAndExtractName(dir_name);
if (!name.empty() && !internal::IsProfileMarkedForDeletion(dir_name))
profile_names.push_back(name);
}
return profile_names;
}
void NukeProfilesMarkedForDeletion() {
base::FilePath marker_root_dir = GetProfileMarkerRootDataDir();
base::FileEnumerator enumerator(marker_root_dir, /*recursive=*/false,
base::FileEnumerator::FILES);
for (base::FilePath marker_path = enumerator.Next(); !marker_path.empty();
marker_path = enumerator.Next()) {
std::string dir_name = enumerator.GetInfo().GetName().MaybeAsASCII();
if (!internal::CheckDirNameAndExtractName(dir_name).empty()) {
// Delete cache and data directory first before deleting marker.
bool delete_success = true;
#if defined(OS_POSIX)
delete_success |=
base::DeletePathRecursively(GetCachePathFromDirName(dir_name));
#endif // OS_POSIX
delete_success |=
base::DeletePathRecursively(GetDataPathFromDirName(dir_name));
// Only delete the marker if deletion is successful.
if (delete_success) {
base::DeleteFile(marker_path);
}
}
}
}
namespace internal {
bool IsValidNameForNonIncognitoProfile(const std::string& name) {
for (char c : name) {
if (!IsValidProfileNameChar(c))
return false;
}
return !name.empty();
}
// If |dir_name| is valid, then return the |name|. Otherwise return the empty
// string.
std::string CheckDirNameAndExtractName(const std::string& dir_name) {
std::vector<std::string> parts =
base::SplitString(dir_name, std::string(1, kSuffixDelimiter),
base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
if (parts.size() == 0 || parts.size() > 2)
return std::string();
if (!IsValidNameForNonIncognitoProfile(parts[0]))
return std::string();
if (parts.size() > 1) {
if (parts[1].empty())
return std::string();
for (char c : parts[1]) {
if (!base::IsAsciiDigit(c))
return std::string();
}
}
return parts[0];
}
bool IsProfileMarkedForDeletion(const std::string& dir_name) {
base::FilePath marker =
GetProfileMarkerRootDataDir().AppendASCII(dir_name.c_str());
return base::PathExists(marker);
}
} // namespace internal
} // namespace weblayer
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