gecko-dev/dom/filesystem/CreateFileTask.cpp

334 строки
8.2 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 "CreateFileTask.h"
#include <algorithm>
#include "mozilla/Preferences.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 "nsNetUtil.h"
#include "nsIOutputStream.h"
#include "nsStringGlue.h"
namespace mozilla {
namespace dom {
uint32_t CreateFileTask::sOutputBufferSize = 0;
CreateFileTask::CreateFileTask(FileSystemBase* aFileSystem,
const nsAString& aPath,
Blob* aBlobData,
InfallibleTArray<uint8_t>& aArrayData,
bool replace,
ErrorResult& aRv)
: FileSystemTaskBase(aFileSystem)
, mTargetRealPath(aPath)
, mReplace(replace)
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
MOZ_ASSERT(aFileSystem);
GetOutputBufferSize();
if (aBlobData) {
if (XRE_IsParentProcess()) {
aBlobData->GetInternalStream(getter_AddRefs(mBlobStream), aRv);
NS_WARN_IF(aRv.Failed());
} else {
mBlobData = aBlobData;
}
}
mArrayData.SwapElements(aArrayData);
nsCOMPtr<nsIGlobalObject> globalObject =
do_QueryInterface(aFileSystem->GetWindow());
if (!globalObject) {
return;
}
mPromise = Promise::Create(globalObject, aRv);
}
CreateFileTask::CreateFileTask(FileSystemBase* aFileSystem,
const FileSystemCreateFileParams& aParam,
FileSystemRequestParent* aParent)
: FileSystemTaskBase(aFileSystem, aParam, aParent)
, mReplace(false)
{
MOZ_ASSERT(XRE_IsParentProcess(),
"Only call from parent process!");
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
MOZ_ASSERT(aFileSystem);
GetOutputBufferSize();
mTargetRealPath = aParam.realPath();
mReplace = aParam.replace();
auto& data = aParam.data();
if (data.type() == FileSystemFileDataValue::TArrayOfuint8_t) {
mArrayData = data;
return;
}
BlobParent* bp = static_cast<BlobParent*>(static_cast<PBlobParent*>(data));
RefPtr<BlobImpl> blobImpl = bp->GetBlobImpl();
MOZ_ASSERT(blobImpl, "blobData should not be null.");
ErrorResult rv;
blobImpl->GetInternalStream(getter_AddRefs(mBlobStream), rv);
if (NS_WARN_IF(rv.Failed())) {
rv.SuppressException();
}
}
CreateFileTask::~CreateFileTask()
{
MOZ_ASSERT((!mPromise && !mBlobData) || NS_IsMainThread(),
"mPromise and mBlobData should be released on main thread!");
if (mBlobStream) {
mBlobStream->Close();
}
}
already_AddRefed<Promise>
CreateFileTask::GetPromise()
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
return RefPtr<Promise>(mPromise).forget();
}
FileSystemParams
CreateFileTask::GetRequestParams(const nsString& aFileSystem) const
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
FileSystemCreateFileParams param;
param.filesystem() = aFileSystem;
param.realPath() = mTargetRealPath;
param.replace() = mReplace;
if (mBlobData) {
BlobChild* actor
= ContentChild::GetSingleton()->GetOrCreateActorForBlob(mBlobData);
if (actor) {
param.data() = actor;
}
} else {
param.data() = mArrayData;
}
return param;
}
FileSystemResponseValue
CreateFileTask::GetSuccessRequestResult() const
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
BlobParent* actor = GetBlobParent(mTargetBlobImpl);
if (!actor) {
return FileSystemErrorResponse(NS_ERROR_DOM_FILESYSTEM_UNKNOWN_ERR);
}
FileSystemFileResponse response;
response.blobParent() = actor;
return response;
}
void
CreateFileTask::SetSuccessRequestResult(const FileSystemResponseValue& aValue)
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
FileSystemFileResponse r = aValue;
BlobChild* actor = static_cast<BlobChild*>(r.blobChild());
mTargetBlobImpl = actor->GetBlobImpl();
}
nsresult
CreateFileTask::Work()
{
class AutoClose
{
public:
explicit AutoClose(nsIOutputStream* aStream)
: mStream(aStream)
{
MOZ_ASSERT(aStream);
}
~AutoClose()
{
mStream->Close();
}
private:
nsCOMPtr<nsIOutputStream> mStream;
};
MOZ_ASSERT(XRE_IsParentProcess(),
"Only call from parent process!");
MOZ_ASSERT(!NS_IsMainThread(), "Only call on worker thread!");
if (mFileSystem->IsShutdown()) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIFile> file = mFileSystem->GetLocalFile(mTargetRealPath);
if (!file) {
return NS_ERROR_DOM_FILESYSTEM_INVALID_PATH_ERR;
}
if (!mFileSystem->IsSafeFile(file)) {
return NS_ERROR_DOM_SECURITY_ERR;
}
bool exists = false;
nsresult rv = file->Exists(&exists);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (exists) {
bool isFile = false;
rv = file->IsFile(&isFile);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (!isFile) {
return NS_ERROR_DOM_FILESYSTEM_TYPE_MISMATCH_ERR;
}
if (!mReplace) {
return NS_ERROR_DOM_FILESYSTEM_PATH_EXISTS_ERR;
}
// Remove the old file before creating.
rv = file->Remove(false);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
rv = file->Create(nsIFile::NORMAL_FILE_TYPE, 0600);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsCOMPtr<nsIOutputStream> outputStream;
rv = NS_NewLocalFileOutputStream(getter_AddRefs(outputStream), file);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
AutoClose acOutputStream(outputStream);
nsCOMPtr<nsIOutputStream> bufferedOutputStream;
rv = NS_NewBufferedOutputStream(getter_AddRefs(bufferedOutputStream),
outputStream,
sOutputBufferSize);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
AutoClose acBufferedOutputStream(bufferedOutputStream);
if (mBlobStream) {
// Write the file content from blob data.
uint64_t bufSize = 0;
rv = mBlobStream->Available(&bufSize);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
while (bufSize && !mFileSystem->IsShutdown()) {
uint32_t written = 0;
uint32_t writeSize = bufSize < UINT32_MAX ? bufSize : UINT32_MAX;
rv = bufferedOutputStream->WriteFrom(mBlobStream, writeSize, &written);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
bufSize -= written;
}
mBlobStream->Close();
mBlobStream = nullptr;
if (mFileSystem->IsShutdown()) {
return NS_ERROR_FAILURE;
}
mTargetBlobImpl = new BlobImplFile(file);
return NS_OK;
}
// Write file content from array data.
uint32_t written;
rv = bufferedOutputStream->Write(
reinterpret_cast<char*>(mArrayData.Elements()),
mArrayData.Length(),
&written);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (mArrayData.Length() != written) {
return NS_ERROR_DOM_FILESYSTEM_UNKNOWN_ERR;
}
mTargetBlobImpl = new BlobImplFile(file);
return NS_OK;
}
void
CreateFileTask::HandlerCallback()
{
MOZ_ASSERT(NS_IsMainThread(), "Only call on main thread!");
if (mFileSystem->IsShutdown()) {
mPromise = nullptr;
mBlobData = nullptr;
return;
}
if (HasError()) {
mPromise->MaybeReject(mErrorValue);
mPromise = nullptr;
mBlobData = nullptr;
return;
}
RefPtr<Blob> blob = Blob::Create(mFileSystem->GetWindow(), mTargetBlobImpl);
mPromise->MaybeResolve(blob);
mPromise = nullptr;
mBlobData = nullptr;
}
void
CreateFileTask::GetPermissionAccessType(nsCString& aAccess) const
{
if (mReplace) {
aAccess.AssignLiteral("write");
return;
}
aAccess.AssignLiteral("create");
}
void
CreateFileTask::GetOutputBufferSize() const
{
if (sOutputBufferSize || !XRE_IsParentProcess()) {
return;
}
sOutputBufferSize =
mozilla::Preferences::GetUint("dom.filesystem.outputBufferSize", 4096 * 4);
}
} // namespace dom
} // namespace mozilla