Migrate webkit/browser/ to storage/browser/

webkit/browser/database/database_util.cc

-// Copyright (c) 2012 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/database/database_util.h"
-
-#include "base/basictypes.h"
-#include "base/strings/utf_string_conversions.h"
-#include "webkit/browser/database/database_tracker.h"
-#include "webkit/browser/database/vfs_backend.h"
-#include "webkit/common/database/database_identifier.h"
-
-namespace storage {
-
-namespace {
-
-bool IsSafeSuffix(const base::string16& suffix) {
-  base::char16 prev_c = 0;
-  for (base::string16::const_iterator it = suffix.begin();
-      it < suffix.end(); ++it) {
-    base::char16 c = *it;
-    if (!(IsAsciiAlpha(c) || IsAsciiDigit(c) ||
-              c == '-' || c == '.' || c == '_')) {
-      return false;
-    }
-    if (c == '.' && prev_c == '.')
-      return false;
-    prev_c = c;
-  }
-  return true;
-}
-
-}
-
-const char DatabaseUtil::kJournalFileSuffix[] = "-journal";
-
-bool DatabaseUtil::CrackVfsFileName(const base::string16& vfs_file_name,
-                                    std::string* origin_identifier,
-                                    base::string16* database_name,
-                                    base::string16* sqlite_suffix) {
-  // 'vfs_file_name' is of the form <origin_identifier>/<db_name>#<suffix>.
-  // <suffix> is optional.
-  DCHECK(!vfs_file_name.empty());
-  size_t first_slash_index = vfs_file_name.find('/');
-  size_t last_pound_index = vfs_file_name.rfind('#');
-  // '/' and '#' must be present in the string. Also, the string cannot start
-  // with a '/' (origin_identifier cannot be empty) and '/' must come before '#'
-  if ((first_slash_index == base::string16::npos) ||
-      (last_pound_index == base::string16::npos) ||
-      (first_slash_index == 0) ||
-      (first_slash_index > last_pound_index)) {
-    return false;
-  }
-
-  std::string origin_id = base::UTF16ToASCII(
-        vfs_file_name.substr(0, first_slash_index));
-  if (!IsValidOriginIdentifier(origin_id))
-    return false;
-
-  base::string16 suffix = vfs_file_name.substr(
-      last_pound_index + 1, vfs_file_name.length() - last_pound_index - 1);
-  if (!IsSafeSuffix(suffix))
-    return false;
-
-  if (origin_identifier)
-    *origin_identifier = origin_id;
-
-  if (database_name) {
-    *database_name = vfs_file_name.substr(
-        first_slash_index + 1, last_pound_index - first_slash_index - 1);
-  }
-
-  if (sqlite_suffix)
-    *sqlite_suffix = suffix;
-
-  return true;
-}
-
-base::FilePath DatabaseUtil::GetFullFilePathForVfsFile(
-    DatabaseTracker* db_tracker, const base::string16& vfs_file_name) {
-  std::string origin_identifier;
-  base::string16 database_name;
-  base::string16 sqlite_suffix;
-  if (!CrackVfsFileName(vfs_file_name, &origin_identifier,
-                        &database_name, &sqlite_suffix)) {
-    return base::FilePath(); // invalid vfs_file_name
-  }
-
-  base::FilePath full_path = db_tracker->GetFullDBFilePath(
-      origin_identifier, database_name);
-  if (!full_path.empty() && !sqlite_suffix.empty()) {
-    DCHECK(full_path.Extension().empty());
-    full_path = full_path.InsertBeforeExtensionASCII(
-        base::UTF16ToASCII(sqlite_suffix));
-  }
-  // Watch out for directory traversal attempts from a compromised renderer.
-  if (full_path.value().find(FILE_PATH_LITERAL("..")) !=
-          base::FilePath::StringType::npos)
-    return base::FilePath();
-  return full_path;
-}
-
-bool DatabaseUtil::IsValidOriginIdentifier(
-    const std::string& origin_identifier) {
-  return GetOriginFromIdentifier(origin_identifier).is_valid();
-}
-
-}  // namespace storage