gecko-dev/dom/filesystem/RemoveTask.cpp

208 строки
5.3 KiB
C++

/* -*- 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 "RemoveTask.h"
#include "DOMError.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/FileSystemBase.h"
#include "mozilla/dom/FileSystemUtils.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/ipc/BlobChild.h"
#include "mozilla/dom/ipc/BlobParent.h"
#include "nsIFile.h"
#include "nsStringGlue.h"
namespace mozilla {
namespace dom {
RemoveTask::RemoveTask(FileSystemBase* aFileSystem,
const nsAString& aDirPath,
FileImpl* aTargetFile,
const nsAString& aTargetPath,
bool aRecursive,
ErrorResult& aRv)
: FileSystemTaskBase(aFileSystem)
, mDirRealPath(aDirPath)
, mTargetFileImpl(aTargetFile)
, mTargetRealPath(aTargetPath)
, mRecursive(aRecursive)
, mReturnValue(false)
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
MOZ_ASSERT(aFileSystem);
nsCOMPtr<nsIGlobalObject> globalObject =
do_QueryInterface(aFileSystem->GetWindow());
if (!globalObject) {
return;
}
mPromise = Promise::Create(globalObject, aRv);
}
RemoveTask::RemoveTask(FileSystemBase* aFileSystem,
const FileSystemRemoveParams& aParam,
FileSystemRequestParent* aParent)
: FileSystemTaskBase(aFileSystem, aParam, aParent)
, mRecursive(false)
, mReturnValue(false)
{
MOZ_ASSERT(FileSystemUtils::IsParentProcess(),
"Only call from parent process!");
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
MOZ_ASSERT(aFileSystem);
mDirRealPath = aParam.directory();
mRecursive = aParam.recursive();
const FileSystemPathOrFileValue& target = aParam.target();
if (target.type() == FileSystemPathOrFileValue::TnsString) {
mTargetRealPath = target;
return;
}
BlobParent* bp = static_cast<BlobParent*>(static_cast<PBlobParent*>(target));
mTargetFileImpl = bp->GetBlobImpl();
MOZ_ASSERT(mTargetFileImpl);
}
RemoveTask::~RemoveTask()
{
MOZ_ASSERT(!mPromise || NS_IsMainThread(),
"mPromise should be released on main thread!");
}
already_AddRefed<Promise>
RemoveTask::GetPromise()
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
return nsRefPtr<Promise>(mPromise).forget();
}
FileSystemParams
RemoveTask::GetRequestParams(const nsString& aFileSystem) const
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
FileSystemRemoveParams param;
param.filesystem() = aFileSystem;
param.directory() = mDirRealPath;
param.recursive() = mRecursive;
if (mTargetFileImpl) {
nsRefPtr<File> file = new File(mFileSystem->GetWindow(), mTargetFileImpl);
BlobChild* actor
= ContentChild::GetSingleton()->GetOrCreateActorForBlob(file);
if (actor) {
param.target() = actor;
}
} else {
param.target() = mTargetRealPath;
}
return param;
}
FileSystemResponseValue
RemoveTask::GetSuccessRequestResult() const
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
return FileSystemBooleanResponse(mReturnValue);
}
void
RemoveTask::SetSuccessRequestResult(const FileSystemResponseValue& aValue)
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
FileSystemBooleanResponse r = aValue;
mReturnValue = r.success();
}
nsresult
RemoveTask::Work()
{
MOZ_ASSERT(FileSystemUtils::IsParentProcess(),
"Only call from parent process!");
MOZ_ASSERT(!NS_IsMainThread(), "Only call on worker thread!");
if (mFileSystem->IsShutdown()) {
return NS_ERROR_FAILURE;
}
// Get the DOM path if a File is passed as the target.
if (mTargetFileImpl) {
if (!mFileSystem->GetRealPath(mTargetFileImpl, mTargetRealPath)) {
return NS_ERROR_DOM_SECURITY_ERR;
}
if (!FileSystemUtils::IsDescendantPath(mDirRealPath, mTargetRealPath)) {
return NS_ERROR_DOM_FILESYSTEM_NO_MODIFICATION_ALLOWED_ERR;
}
}
nsCOMPtr<nsIFile> file = mFileSystem->GetLocalFile(mTargetRealPath);
if (!file) {
return NS_ERROR_DOM_FILESYSTEM_INVALID_PATH_ERR;
}
bool exists = false;
nsresult rv = file->Exists(&exists);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (!exists) {
mReturnValue = false;
return NS_OK;
}
bool isFile = false;
rv = file->IsFile(&isFile);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (isFile && !mFileSystem->IsSafeFile(file)) {
return NS_ERROR_DOM_SECURITY_ERR;
}
rv = file->Remove(mRecursive);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mReturnValue = true;
return NS_OK;
}
void
RemoveTask::HandlerCallback()
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
if (mFileSystem->IsShutdown()) {
mPromise = nullptr;
return;
}
if (HasError()) {
nsRefPtr<DOMError> domError = new DOMError(mFileSystem->GetWindow(),
mErrorValue);
mPromise->MaybeRejectBrokenly(domError);
mPromise = nullptr;
return;
}
mPromise->MaybeResolve(mReturnValue);
mPromise = nullptr;
}
void
RemoveTask::GetPermissionAccessType(nsCString& aAccess) const
{
aAccess.AssignLiteral("write");
}
} // namespace dom
} // namespace mozilla