/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this file, * You can obtain one at http://mozilla.org/MPL/2.0/. */ #include "mozilla/dom/FileSystemUtils.h" namespace mozilla { namespace dom { namespace { bool TokenizerIgnoreNothing(char16_t /* aChar */) { return false; } } // anonymous namespace /* static */ bool FileSystemUtils::IsDescendantPath(const nsAString& aPath, const nsAString& aDescendantPath) { // Check the sub-directory path to see if it has the parent path as prefix. if (!aDescendantPath.Equals(aPath) && !StringBeginsWith(aDescendantPath, aPath)) { return false; } return true; } /* static */ bool FileSystemUtils::IsValidRelativeDOMPath(const nsAString& aPath, nsTArray<nsString>& aParts) { // We don't allow empty relative path to access the root. if (aPath.IsEmpty()) { return false; } // Leading and trailing "/" are not allowed. if (aPath.First() == FILESYSTEM_DOM_PATH_SEPARATOR_CHAR || aPath.Last() == FILESYSTEM_DOM_PATH_SEPARATOR_CHAR) { return false; } NS_NAMED_LITERAL_STRING(kCurrentDir, "."); NS_NAMED_LITERAL_STRING(kParentDir, ".."); // Split path and check each path component. nsCharSeparatedTokenizerTemplate<TokenizerIgnoreNothing> tokenizer(aPath, FILESYSTEM_DOM_PATH_SEPARATOR_CHAR); while (tokenizer.hasMoreTokens()) { nsDependentSubstring pathComponent = tokenizer.nextToken(); // The path containing empty components, such as "foo//bar", is invalid. // We don't allow paths, such as "../foo", "foo/./bar" and "foo/../bar", // to walk up the directory. if (pathComponent.IsEmpty() || pathComponent.Equals(kCurrentDir) || pathComponent.Equals(kParentDir)) { return false; } aParts.AppendElement(pathComponent); } return true; } } // namespace dom } // namespace mozilla