Implement special origin database handling for Isolated Apps

webkit/browser/fileapi/sandbox_isolated_origin_database.cc

+// Copyright 2013 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 "webkit/browser/fileapi/sandbox_isolated_origin_database.h"
+
+#include "base/file_util.h"
+#include "base/logging.h"
+#include "webkit/browser/fileapi/sandbox_origin_database.h"
+
+namespace fileapi {
+
+// Special directory name for isolated origin.
+const base::FilePath::CharType kOriginDirectory[] = FILE_PATH_LITERAL("iso");
+
+SandboxIsolatedOriginDatabase::SandboxIsolatedOriginDatabase(
+    const std::string& origin,
+    const base::FilePath& file_system_directory)
+    : migration_checked_(false),
+      origin_(origin),
+      file_system_directory_(file_system_directory) {
+}
+
+SandboxIsolatedOriginDatabase::~SandboxIsolatedOriginDatabase() {
+}
+
+bool SandboxIsolatedOriginDatabase::HasOriginPath(
+    const std::string& origin) {
+  MigrateDatabaseIfNeeded();
+  return (origin_ == origin);
+}
+
+bool SandboxIsolatedOriginDatabase::GetPathForOrigin(
+    const std::string& origin, base::FilePath* directory) {
+  MigrateDatabaseIfNeeded();
+  if (origin != origin_)
+    return false;
+  *directory = base::FilePath(kOriginDirectory);
+  return true;
+}
+
+bool SandboxIsolatedOriginDatabase::RemovePathForOrigin(
+    const std::string& origin) {
+  return true;
+}
+
+bool SandboxIsolatedOriginDatabase::ListAllOrigins(
+    std::vector<OriginRecord>* origins) {
+  MigrateDatabaseIfNeeded();
+  origins->push_back(OriginRecord(origin_, base::FilePath(kOriginDirectory)));
+  return true;
+}
+
+void SandboxIsolatedOriginDatabase::DropDatabase() {
+}
+
+void SandboxIsolatedOriginDatabase::MigrateDatabaseIfNeeded() {
+  if (migration_checked_)
+    return;
+
+  migration_checked_ = true;
+  // See if we have non-isolated version of sandbox database.
+  scoped_ptr<SandboxOriginDatabase> database(
+      new SandboxOriginDatabase(file_system_directory_));
+  if (!database->HasOriginPath(origin_))
+    return;
+
+  base::FilePath directory_name;
+  if (database->GetPathForOrigin(origin_, &directory_name) &&
+      directory_name != base::FilePath(kOriginDirectory)) {
+    base::FilePath from_path = file_system_directory_.Append(directory_name);
+    base::FilePath to_path = file_system_directory_.Append(kOriginDirectory);
+
+    if (file_util::PathExists(to_path))
+      file_util::Delete(to_path, true /* recursive */);
+    file_util::Move(from_path, to_path);
+  }
+
+  database->RemoveDatabase();
+}
+
+}  // namespace fileapi