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// Copyright 2015 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 "chrome/browser/extensions/app_data_migrator.h"
#include "base/files/file_util.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/profiles/profile.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/indexed_db_context.h"
#include "content/public/browser/storage_partition.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/common/extension.h"
#include "storage/browser/fileapi/file_system_context.h"
#include "storage/browser/fileapi/sandbox_file_system_backend_delegate.h"
#include "storage/common/fileapi/file_system_types.h"
using base::WeakPtr;
using content::BrowserContext;
using content::BrowserThread;
using content::IndexedDBContext;
using content::StoragePartition;
using storage::FileSystemContext;
using storage::SandboxFileSystemBackendDelegate;
namespace {
void MigrateOnFileSystemThread(FileSystemContext* old_fs_context,
FileSystemContext* fs_context,
const extensions::Extension* extension) {
DCHECK(
old_fs_context->default_file_task_runner()->RunsTasksOnCurrentThread());
SandboxFileSystemBackendDelegate* old_sandbox_delegate =
old_fs_context->sandbox_delegate();
SandboxFileSystemBackendDelegate* sandbox_delegate =
fs_context->sandbox_delegate();
GURL extension_url =
extensions::Extension::GetBaseURLFromExtensionId(extension->id());
scoped_ptr<storage::SandboxFileSystemBackendDelegate::OriginEnumerator>
enumerator(old_sandbox_delegate->CreateOriginEnumerator());
// Find out if there is a file system that needs migration.
GURL origin;
do {
origin = enumerator->Next();
} while (origin != extension_url && !origin.is_empty());
if (!origin.is_empty()) {
// Copy the temporary file system.
if (enumerator->HasFileSystemType(storage::kFileSystemTypeTemporary)) {
old_sandbox_delegate->CopyFileSystem(
extension_url, storage::kFileSystemTypeTemporary, sandbox_delegate);
}
// Copy the persistent file system.
if (enumerator->HasFileSystemType(storage::kFileSystemTypePersistent)) {
old_sandbox_delegate->CopyFileSystem(
extension_url, storage::kFileSystemTypePersistent, sandbox_delegate);
}
}
}
void MigrateOnIndexedDBThread(IndexedDBContext* old_indexed_db_context,
IndexedDBContext* indexed_db_context,
const extensions::Extension* extension) {
DCHECK(old_indexed_db_context->TaskRunner()->RunsTasksOnCurrentThread());
GURL extension_url =
extensions::Extension::GetBaseURLFromExtensionId(extension->id());
old_indexed_db_context->CopyOriginData(extension_url, indexed_db_context);
}
void MigrateFileSystem(WeakPtr<extensions::AppDataMigrator> migrator,
StoragePartition* old_partition,
StoragePartition* current_partition,
const extensions::Extension* extension,
const base::Closure& reply) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// Since this method is static and it's being run as a closure task, check to
// make sure the calling object is still around.
if (!migrator.get()) {
return;
}
FileSystemContext* old_fs_context = old_partition->GetFileSystemContext();
FileSystemContext* fs_context = current_partition->GetFileSystemContext();
// Perform the file system migration on the old file system's
// sequenced task runner. This is to ensure it queues after any
// in-flight file system operations. After it completes, it should
// invoke the original callback passed into DoMigrationAndReply.
old_fs_context->default_file_task_runner()->PostTaskAndReply(
FROM_HERE,
base::Bind(&MigrateOnFileSystemThread, make_scoped_refptr(old_fs_context),
make_scoped_refptr(fs_context), make_scoped_refptr(extension)),
reply);
}
void MigrateLegacyPartition(WeakPtr<extensions::AppDataMigrator> migrator,
StoragePartition* old_partition,
StoragePartition* current_partition,
const extensions::Extension* extension,
const base::Closure& reply) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
IndexedDBContext* indexed_db_context =
current_partition->GetIndexedDBContext();
IndexedDBContext* old_indexed_db_context =
old_partition->GetIndexedDBContext();
// Create a closure for the file system migration. This is the next step in
// the migration flow after the IndexedDB migration.
base::Closure migrate_fs =
base::Bind(&MigrateFileSystem, migrator, old_partition, current_partition,
make_scoped_refptr(extension), reply);
// Perform the IndexedDB migration on the old context's sequenced task
// runner. After completion, it should call MigrateFileSystem.
old_indexed_db_context->TaskRunner()->PostTaskAndReply(
FROM_HERE, base::Bind(&MigrateOnIndexedDBThread,
make_scoped_refptr(old_indexed_db_context),
make_scoped_refptr(indexed_db_context),
make_scoped_refptr(extension)),
migrate_fs);
}
} // namespace
namespace extensions {
AppDataMigrator::AppDataMigrator(Profile* profile, ExtensionRegistry* registry)
: profile_(profile), registry_(registry), weak_factory_(this) {
}
AppDataMigrator::~AppDataMigrator() {
}
bool AppDataMigrator::NeedsMigration(const Extension* old,
const Extension* extension) {
return old && old->is_legacy_packaged_app() && extension->is_platform_app();
}
void AppDataMigrator::DoMigrationAndReply(const Extension* old,
const Extension* extension,
const base::Closure& reply) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK(NeedsMigration(old, extension));
// This should retrieve the general storage partition.
content::StoragePartition* old_partition =
BrowserContext::GetStoragePartitionForSite(
profile_, Extension::GetBaseURLFromExtensionId(extension->id()));
// Enable the new extension so we can access its storage partition.
bool old_was_disabled = registry_->AddEnabled(extension);
// This should create a new isolated partition for the new version of the
// extension.
StoragePartition* new_partition = BrowserContext::GetStoragePartitionForSite(
profile_, Extension::GetBaseURLFromExtensionId(extension->id()));
// Now, restore the enabled/disabled state of the new and old extensions.
if (old_was_disabled)
registry_->RemoveEnabled(extension->id());
else
registry_->AddEnabled(old);
MigrateLegacyPartition(weak_factory_.GetWeakPtr(), old_partition,
new_partition, extension, reply);
}
} // namespace extensions
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