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-rw-r--r--dom/base/nsStructuredCloneContainer.cpp162
1 files changed, 162 insertions, 0 deletions
diff --git a/dom/base/nsStructuredCloneContainer.cpp b/dom/base/nsStructuredCloneContainer.cpp
new file mode 100644
index 0000000000..3a961f820d
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+++ b/dom/base/nsStructuredCloneContainer.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 "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;
+}