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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 <utility>
#include "ErrorList.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 "nsCOMPtr.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsIVariant.h"
#include "nsIXPConnect.h"
#include "nsString.h"
#include "nscore.h"
using namespace mozilla;
using namespace mozilla::dom;
NS_IMPL_ADDREF(nsStructuredCloneContainer)
NS_IMPL_RELEASE(nsStructuredCloneContainer)
NS_INTERFACE_MAP_BEGIN(nsStructuredCloneContainer)
NS_INTERFACE_MAP_ENTRY(nsIStructuredCloneContainer)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
nsStructuredCloneContainer::nsStructuredCloneContainer() : mVersion(0) {}
nsStructuredCloneContainer::nsStructuredCloneContainer(uint32_t aVersion)
: mVersion(aVersion) {}
nsStructuredCloneContainer::~nsStructuredCloneContainer() = default;
NS_IMETHODIMP
nsStructuredCloneContainer::InitFromJSVal(JS::Handle<JS::Value> aData,
JSContext* aCx) {
if (DataLength()) {
return NS_ERROR_FAILURE;
}
ErrorResult 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.
rv.SuppressException();
return NS_ERROR_DOM_DATA_CLONE_ERR;
}
mVersion = JS_STRUCTURED_CLONE_VERSION;
return NS_OK;
}
NS_IMETHODIMP
nsStructuredCloneContainer::InitFromBase64(const nsAString& aData,
uint32_t aFormatVersion) {
if (DataLength()) {
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())) {
return NS_ERROR_OUT_OF_MEMORY;
}
mVersion = aFormatVersion;
return NS_OK;
}
nsresult nsStructuredCloneContainer::DeserializeToJsval(
JSContext* aCx, JS::MutableHandle<JS::Value> aValue) {
aValue.setNull();
JS::Rooted<JS::Value> jsStateObj(aCx);
ErrorResult 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.
rv.SuppressException();
return NS_ERROR_DOM_DATA_CLONE_ERR;
}
aValue.set(jsStateObj);
return NS_OK;
}
NS_IMETHODIMP
nsStructuredCloneContainer::GetDataAsBase64(nsAString& aOut) {
aOut.Truncate();
if (!DataLength()) {
return NS_ERROR_FAILURE;
}
if (HasClonedDOMObjects()) {
return NS_ERROR_FAILURE;
}
auto iter = Data().Start();
size_t size = Data().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 = Data().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 (!DataLength()) {
return NS_ERROR_FAILURE;
}
*aSize = DataLength();
return NS_OK;
}
NS_IMETHODIMP
nsStructuredCloneContainer::GetFormatVersion(uint32_t* aFormatVersion) {
NS_ENSURE_ARG_POINTER(aFormatVersion);
if (!DataLength()) {
return NS_ERROR_FAILURE;
}
*aFormatVersion = mVersion;
return NS_OK;
}
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