gecko-dev/dom/filesystem/Directory.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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/Directory.h"
#include "CreateDirectoryTask.h"
#include "CreateFileTask.h"
#include "FileSystemPermissionRequest.h"
#include "GetFileOrDirectoryTask.h"
#include "RemoveTask.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsString.h"
#include "mozilla/dom/DirectoryBinding.h"
#include "mozilla/dom/FileSystemBase.h"
#include "mozilla/dom/FileSystemUtils.h"
// Resolve the name collision of Microsoft's API name with macros defined in
// Windows header files. Undefine the macro of CreateDirectory to avoid
// Directory#CreateDirectory being replaced by Directory#CreateDirectoryW.
#ifdef CreateDirectory
#undef CreateDirectory
#endif
// Undefine the macro of CreateFile to avoid Directory#CreateFile being replaced
// by Directory#CreateFileW.
#ifdef CreateFile
#undef CreateFile
#endif
namespace mozilla {
namespace dom {
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(Directory)
NS_IMPL_CYCLE_COLLECTING_ADDREF(Directory)
NS_IMPL_CYCLE_COLLECTING_RELEASE(Directory)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Directory)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
// static
already_AddRefed<Promise>
Directory::GetRoot(FileSystemBase* aFileSystem, ErrorResult& aRv)
{
nsRefPtr<GetFileOrDirectoryTask> task = new GetFileOrDirectoryTask(
aFileSystem, EmptyString(), true, aRv);
if (aRv.Failed()) {
return nullptr;
}
FileSystemPermissionRequest::RequestForTask(task);
return task->GetPromise();
}
Directory::Directory(FileSystemBase* aFileSystem,
const nsAString& aPath)
: mFileSystem(aFileSystem)
, mPath(aPath)
{
MOZ_ASSERT(aFileSystem, "aFileSystem should not be null.");
// Remove the trailing "/".
mPath.Trim(FILESYSTEM_DOM_PATH_SEPARATOR, false, true);
}
Directory::~Directory()
{
}
nsPIDOMWindow*
Directory::GetParentObject() const
{
return mFileSystem->GetWindow();
}
JSObject*
Directory::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return DirectoryBinding::Wrap(aCx, this, aGivenProto);
}
void
Directory::GetName(nsString& aRetval) const
{
aRetval.Truncate();
if (mPath.IsEmpty()) {
aRetval = mFileSystem->GetRootName();
return;
}
aRetval = Substring(mPath,
mPath.RFindChar(FileSystemUtils::kSeparatorChar) + 1);
}
already_AddRefed<Promise>
Directory::CreateFile(const nsAString& aPath, const CreateFileOptions& aOptions,
ErrorResult& aRv)
{
nsresult error = NS_OK;
nsString realPath;
nsRefPtr<File> blobData;
InfallibleTArray<uint8_t> arrayData;
bool replace = (aOptions.mIfExists == CreateIfExistsMode::Replace);
// Get the file content.
if (aOptions.mData.WasPassed()) {
auto& data = aOptions.mData.Value();
if (data.IsString()) {
NS_ConvertUTF16toUTF8 str(data.GetAsString());
arrayData.AppendElements(reinterpret_cast<const uint8_t *>(str.get()),
str.Length());
} else if (data.IsArrayBuffer()) {
const ArrayBuffer& buffer = data.GetAsArrayBuffer();
buffer.ComputeLengthAndData();
arrayData.AppendElements(buffer.Data(), buffer.Length());
} else if (data.IsArrayBufferView()){
const ArrayBufferView& view = data.GetAsArrayBufferView();
view.ComputeLengthAndData();
arrayData.AppendElements(view.Data(), view.Length());
} else {
blobData = data.GetAsBlob();
}
}
if (!DOMPathToRealPath(aPath, realPath)) {
error = NS_ERROR_DOM_FILESYSTEM_INVALID_PATH_ERR;
}
nsRefPtr<CreateFileTask> task =
new CreateFileTask(mFileSystem, realPath, blobData, arrayData, replace, aRv);
if (aRv.Failed()) {
return nullptr;
}
task->SetError(error);
FileSystemPermissionRequest::RequestForTask(task);
return task->GetPromise();
}
already_AddRefed<Promise>
Directory::CreateDirectory(const nsAString& aPath, ErrorResult& aRv)
{
nsresult error = NS_OK;
nsString realPath;
if (!DOMPathToRealPath(aPath, realPath)) {
error = NS_ERROR_DOM_FILESYSTEM_INVALID_PATH_ERR;
}
nsRefPtr<CreateDirectoryTask> task = new CreateDirectoryTask(
mFileSystem, realPath, aRv);
if (aRv.Failed()) {
return nullptr;
}
task->SetError(error);
FileSystemPermissionRequest::RequestForTask(task);
return task->GetPromise();
}
already_AddRefed<Promise>
Directory::Get(const nsAString& aPath, ErrorResult& aRv)
{
nsresult error = NS_OK;
nsString realPath;
if (!DOMPathToRealPath(aPath, realPath)) {
error = NS_ERROR_DOM_FILESYSTEM_INVALID_PATH_ERR;
}
nsRefPtr<GetFileOrDirectoryTask> task = new GetFileOrDirectoryTask(
mFileSystem, realPath, false, aRv);
if (aRv.Failed()) {
return nullptr;
}
task->SetError(error);
FileSystemPermissionRequest::RequestForTask(task);
return task->GetPromise();
}
already_AddRefed<Promise>
Directory::Remove(const StringOrFileOrDirectory& aPath, ErrorResult& aRv)
{
return RemoveInternal(aPath, false, aRv);
}
already_AddRefed<Promise>
Directory::RemoveDeep(const StringOrFileOrDirectory& aPath, ErrorResult& aRv)
{
return RemoveInternal(aPath, true, aRv);
}
already_AddRefed<Promise>
Directory::RemoveInternal(const StringOrFileOrDirectory& aPath, bool aRecursive,
ErrorResult& aRv)
{
nsresult error = NS_OK;
nsString realPath;
nsRefPtr<FileImpl> file;
// Check and get the target path.
if (aPath.IsFile()) {
file = aPath.GetAsFile().Impl();
} else if (aPath.IsString()) {
if (!DOMPathToRealPath(aPath.GetAsString(), realPath)) {
error = NS_ERROR_DOM_FILESYSTEM_INVALID_PATH_ERR;
}
} else if (!mFileSystem->IsSafeDirectory(&aPath.GetAsDirectory())) {
error = NS_ERROR_DOM_SECURITY_ERR;
} else {
realPath = aPath.GetAsDirectory().mPath;
// The target must be a descendant of this directory.
if (!FileSystemUtils::IsDescendantPath(mPath, realPath)) {
error = NS_ERROR_DOM_FILESYSTEM_NO_MODIFICATION_ALLOWED_ERR;
}
}
nsRefPtr<RemoveTask> task = new RemoveTask(mFileSystem, mPath, file, realPath,
aRecursive, aRv);
if (aRv.Failed()) {
return nullptr;
}
task->SetError(error);
FileSystemPermissionRequest::RequestForTask(task);
return task->GetPromise();
}
FileSystemBase*
Directory::GetFileSystem() const
{
return mFileSystem.get();
}
bool
Directory::DOMPathToRealPath(const nsAString& aPath, nsAString& aRealPath) const
{
aRealPath.Truncate();
nsString relativePath;
relativePath = aPath;
// Trim white spaces.
static const char kWhitespace[] = "\b\t\r\n ";
relativePath.Trim(kWhitespace);
if (!IsValidRelativePath(relativePath)) {
return false;
}
aRealPath = mPath + NS_LITERAL_STRING(FILESYSTEM_DOM_PATH_SEPARATOR) +
relativePath;
return true;
}
// static
bool
Directory::IsValidRelativePath(const nsString& aPath)
{
// 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() == FileSystemUtils::kSeparatorChar ||
aPath.Last() == FileSystemUtils::kSeparatorChar) {
return false;
}
NS_NAMED_LITERAL_STRING(kCurrentDir, ".");
NS_NAMED_LITERAL_STRING(kParentDir, "..");
// Split path and check each path component.
nsCharSeparatedTokenizer tokenizer(aPath, FileSystemUtils::kSeparatorChar);
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;
}
}
return true;
}
} // namespace dom
} // namespace mozilla