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FileCreatorHelper.cpp
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FileCreatorHelper.cpp
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/* -*- 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 "FileCreatorHelper.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/FileBinding.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/Promise.h"
#include "nsContentUtils.h"
#include "nsPIDOMWindow.h"
#include "nsIFile.h"
// Undefine the macro of CreateFile to avoid FileCreatorHelper#CreateFile being
// replaced by FileCreatorHelper#CreateFileW.
#ifdef CreateFile
#undef CreateFile
#endif
namespace mozilla {
namespace dom {
/* static */ already_AddRefed<Promise>
FileCreatorHelper::CreateFile(nsIGlobalObject* aGlobalObject,
nsIFile* aFile,
const ChromeFilePropertyBag& aBag,
bool aIsFromNsIFile,
ErrorResult& aRv)
{
MOZ_DIAGNOSTIC_ASSERT(NS_IsMainThread());
RefPtr<Promise> promise = Promise::Create(aGlobalObject, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(aGlobalObject);
// Parent process
if (XRE_IsParentProcess()) {
RefPtr<File> file =
CreateFileInternal(window, aFile, aBag, aIsFromNsIFile, aRv);
if (aRv.Failed()) {
return nullptr;
}
promise->MaybeResolve(file);
return promise.forget();
}
// Content process.
ContentChild* cc = ContentChild::GetSingleton();
if (!cc) {
promise->MaybeReject(NS_ERROR_DOM_INVALID_STATE_ERR);
return promise.forget();
}
if (!cc->GetRemoteType().EqualsLiteral(FILE_REMOTE_TYPE) &&
!Preferences::GetBool("dom.file.createInChild", false)) {
// If this pref is not set and the request is received by the parent
// process, this child is killed for security reason.
promise->MaybeReject(NS_ERROR_DOM_INVALID_STATE_ERR);
return promise.forget();
}
RefPtr<FileCreatorHelper> helper = new FileCreatorHelper(promise, window);
// The request is sent to the parent process and it's kept alive by
// ContentChild.
helper->SendRequest(aFile, aBag, aIsFromNsIFile, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
return promise.forget();
}
/* static */ already_AddRefed<File>
FileCreatorHelper::CreateFileInternal(nsPIDOMWindowInner* aWindow,
nsIFile* aFile,
const ChromeFilePropertyBag& aBag,
bool aIsFromNsIFile,
ErrorResult& aRv)
{
bool lastModifiedPassed = false;
int64_t lastModified = 0;
if (aBag.mLastModified.WasPassed()) {
lastModifiedPassed = true;
lastModified = aBag.mLastModified.Value();
}
RefPtr<BlobImpl> blobImpl;
aRv = CreateBlobImpl(aFile, aBag.mType, aBag.mName, lastModifiedPassed,
lastModified, aBag.mExistenceCheck, aIsFromNsIFile,
getter_AddRefs(blobImpl));
if (aRv.Failed()) {
return nullptr;
}
RefPtr<File> file = File::Create(aWindow, blobImpl);
return file.forget();
}
FileCreatorHelper::FileCreatorHelper(Promise* aPromise,
nsPIDOMWindowInner* aWindow)
: mPromise(aPromise)
, mWindow(aWindow)
{
MOZ_ASSERT(aPromise);
}
FileCreatorHelper::~FileCreatorHelper()
{
}
void
FileCreatorHelper::SendRequest(nsIFile* aFile,
const ChromeFilePropertyBag& aBag,
bool aIsFromNsIFile,
ErrorResult& aRv)
{
MOZ_ASSERT(aFile);
ContentChild* cc = ContentChild::GetSingleton();
if (NS_WARN_IF(!cc)) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
nsID uuid;
aRv = nsContentUtils::GenerateUUIDInPlace(uuid);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
nsAutoString path;
aRv = aFile->GetPath(path);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
cc->FileCreationRequest(uuid, this, path, aBag.mType, aBag.mName,
aBag.mLastModified, aBag.mExistenceCheck,
aIsFromNsIFile);
}
void
FileCreatorHelper::ResponseReceived(BlobImpl* aBlobImpl, nsresult aRv)
{
if (NS_FAILED(aRv)) {
mPromise->MaybeReject(aRv);
return;
}
RefPtr<File> file = File::Create(mWindow, aBlobImpl);
mPromise->MaybeResolve(file);
}
/* static */ nsresult
FileCreatorHelper::CreateBlobImplForIPC(const nsAString& aPath,
const nsAString& aType,
const nsAString& aName,
bool aLastModifiedPassed,
int64_t aLastModified,
bool aExistenceCheck,
bool aIsFromNsIFile,
BlobImpl** aBlobImpl)
{
nsCOMPtr<nsIFile> file;
nsresult rv = NS_NewLocalFile(aPath, true, getter_AddRefs(file));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return CreateBlobImpl(file, aType, aName, aLastModifiedPassed, aLastModified,
aExistenceCheck, aIsFromNsIFile, aBlobImpl);
}
/* static */ nsresult
FileCreatorHelper::CreateBlobImpl(nsIFile* aFile,
const nsAString& aType,
const nsAString& aName,
bool aLastModifiedPassed,
int64_t aLastModified,
bool aExistenceCheck,
bool aIsFromNsIFile,
BlobImpl** aBlobImpl)
{
if (!aExistenceCheck) {
RefPtr<FileBlobImpl> impl = new FileBlobImpl(aFile);
if (!aName.IsEmpty()) {
impl->SetName(aName);
}
if (!aType.IsEmpty()) {
impl->SetType(aType);
}
if (aLastModifiedPassed) {
impl->SetLastModified(aLastModified);
}
impl.forget(aBlobImpl);
return NS_OK;
}
RefPtr<MultipartBlobImpl> impl = new MultipartBlobImpl(EmptyString());
nsresult rv =
impl->InitializeChromeFile(aFile, aType, aName, aLastModifiedPassed,
aLastModified, aIsFromNsIFile);
if (NS_FAILED(rv)) {
return rv;
}
MOZ_ASSERT(impl->IsFile());
impl.forget(aBlobImpl);
return NS_OK;
}
} // dom namespace
} // mozilla namespace