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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 "nsStructuredCloneContainer.h"
#include <cstddef>
#include "ErrorList.h"
#include "chrome/common/ipc_message_utils.h"
#include "ipc/IPCMessageUtilsSpecializations.h"
#include "js/RootingAPI.h"
#include "js/StructuredClone.h"
#include "js/Value.h"
#include "mozilla/Assertions.h"
#include "mozilla/Base64.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/fallible.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsString.h"
#include "nscore.h"
using namespace mozilla;
using namespace mozilla::dom;
NS_IMPL_ADDREF_INHERITED(nsStructuredCloneContainer,
mozilla::dom::ipc::StructuredCloneData)
NS_IMPL_RELEASE_INHERITED(nsStructuredCloneContainer,
mozilla::dom::ipc::StructuredCloneData)
NS_INTERFACE_MAP_BEGIN(nsStructuredCloneContainer)
NS_INTERFACE_MAP_ENTRY(nsIStructuredCloneContainer)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
nsStructuredCloneContainer::nsStructuredCloneContainer()
: mozilla::dom::ipc::StructuredCloneData(
JS::StructuredCloneScope::DifferentProcess,
StructuredCloneHolder::TransferringNotSupported) {}
nsStructuredCloneContainer::~nsStructuredCloneContainer() = default;
NS_IMETHODIMP
nsStructuredCloneContainer::InitFromJSVal(JS::Handle<JS::Value> aData,
JSContext* aCx) {
if (HasData()) {
return NS_ERROR_FAILURE;
}
IgnoredErrorResult rv;
Write(aCx, aData, rv);
if (NS_WARN_IF(rv.Failed())) {
// XXX propagate the error message as well.
// We cannot StealNSResult because we threw a DOM exception.
return NS_ERROR_DOM_DATA_CLONE_ERR;
}
return NS_OK;
}
NS_IMETHODIMP
nsStructuredCloneContainer::InitFromBase64(const nsAString& aData,
uint32_t aFormatVersion) {
if (HasData()) {
return NS_ERROR_FAILURE;
}
NS_ConvertUTF16toUTF8 data(aData);
nsAutoCString binaryData;
nsresult rv = Base64Decode(data, binaryData);
NS_ENSURE_SUCCESS(rv, rv);
if (!CopyExternalData(binaryData.get(), binaryData.Length(),
aFormatVersion)) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
nsresult nsStructuredCloneContainer::DeserializeToJsval(
JSContext* aCx, JS::MutableHandle<JS::Value> aValue) {
if (!HasData()) {
return NS_ERROR_FAILURE;
}
aValue.setNull();
JS::Rooted<JS::Value> jsStateObj(aCx);
IgnoredErrorResult rv;
Read(aCx, &jsStateObj, rv);
if (NS_WARN_IF(rv.Failed())) {
// XXX propagate the error message as well.
// We cannot StealNSResult because we threw a DOM exception.
return NS_ERROR_DOM_DATA_CLONE_ERR;
}
aValue.set(jsStateObj);
return NS_OK;
}
NS_IMETHODIMP
nsStructuredCloneContainer::GetDataAsBase64(nsAString& aOut) {
aOut.Truncate();
if (!HasData()) {
return NS_ERROR_FAILURE;
}
if (HasClonedDOMObjects()) {
return NS_ERROR_FAILURE;
}
auto iter = BufferData().Start();
size_t size = BufferData().Size();
CheckedInt<nsAutoCString::size_type> sizeCheck(size);
if (!sizeCheck.isValid()) {
return NS_ERROR_FAILURE;
}
nsAutoCString binaryData;
if (!binaryData.SetLength(size, fallible)) {
return NS_ERROR_OUT_OF_MEMORY;
}
DebugOnly<bool> res =
BufferData().ReadBytes(iter, binaryData.BeginWriting(), size);
MOZ_ASSERT(res);
nsresult rv = Base64Encode(binaryData, aOut);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
NS_IMETHODIMP
nsStructuredCloneContainer::GetSerializedNBytes(uint64_t* aSize) {
NS_ENSURE_ARG_POINTER(aSize);
if (!HasData()) {
return NS_ERROR_FAILURE;
}
*aSize = BufferData().Size();
return NS_OK;
}
NS_IMETHODIMP
nsStructuredCloneContainer::GetFormatVersion(uint32_t* aFormatVersion) {
NS_ENSURE_ARG_POINTER(aFormatVersion);
if (!HasData()) {
return NS_ERROR_FAILURE;
}
*aFormatVersion = BufferVersion();
return NS_OK;
}
void IPC::ParamTraits<nsStructuredCloneContainer*>::Write(
IPC::MessageWriter* aWriter, paramType* aParam) {
bool isNull = !aParam;
WriteParam(aWriter, isNull);
if (isNull) {
return;
}
aParam->WriteIPCParams(aWriter);
}
bool IPC::ParamTraits<nsStructuredCloneContainer*>::Read(
IPC::MessageReader* aReader, RefPtr<paramType>* aResult) {
bool isNull;
if (!ReadParam(aReader, &isNull)) {
return false;
}
if (isNull) {
*aResult = nullptr;
return true;
}
*aResult = new nsStructuredCloneContainer();
return (*aResult)->ReadIPCParams(aReader);
}
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