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-rw-r--r--dom/base/DOMParser.cpp324
1 files changed, 324 insertions, 0 deletions
diff --git a/dom/base/DOMParser.cpp b/dom/base/DOMParser.cpp
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--- /dev/null
+++ b/dom/base/DOMParser.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 "mozilla/dom/DOMParser.h"
+
+#include "nsNetUtil.h"
+#include "nsDOMString.h"
+#include "MainThreadUtils.h"
+#include "SystemPrincipal.h"
+#include "nsIScriptGlobalObject.h"
+#include "nsIStreamListener.h"
+#include "nsStringStream.h"
+#include "nsCRT.h"
+#include "nsStreamUtils.h"
+#include "nsContentUtils.h"
+#include "nsDOMJSUtils.h"
+#include "nsError.h"
+#include "nsPIDOMWindow.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/LoadInfo.h"
+#include "mozilla/NullPrincipal.h"
+#include "mozilla/dom/BindingUtils.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/ScriptSettings.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+DOMParser::DOMParser(nsIGlobalObject* aOwner, nsIPrincipal* aDocPrincipal,
+ nsIURI* aDocumentURI, nsIURI* aBaseURI)
+ : mOwner(aOwner),
+ mPrincipal(aDocPrincipal),
+ mDocumentURI(aDocumentURI),
+ mBaseURI(aBaseURI),
+ mForceEnableXULXBL(false),
+ mForceEnableDTD(false) {
+ MOZ_ASSERT(aDocPrincipal);
+ MOZ_ASSERT(aDocumentURI);
+}
+
+DOMParser::~DOMParser() = default;
+
+// QueryInterface implementation for DOMParser
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMParser)
+ NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+ NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(DOMParser, mOwner)
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMParser)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMParser)
+
+already_AddRefed<Document> DOMParser::ParseFromString(const nsAString& aStr,
+ SupportedType aType,
+ ErrorResult& aRv) {
+ if (aType == SupportedType::Text_html) {
+ nsCOMPtr<Document> document = SetUpDocument(DocumentFlavorHTML, aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ // Keep the XULXBL state in sync with the XML case.
+ if (mForceEnableXULXBL) {
+ document->ForceEnableXULXBL();
+ }
+
+ if (mForceEnableDTD) {
+ document->ForceSkipDTDSecurityChecks();
+ }
+
+ nsresult rv = nsContentUtils::ParseDocumentHTML(aStr, document, false);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ aRv.Throw(rv);
+ return nullptr;
+ }
+
+ return document.forget();
+ }
+
+ nsAutoCString utf8str;
+ // Convert from UTF16 to UTF8 using fallible allocations
+ if (!AppendUTF16toUTF8(aStr, utf8str, mozilla::fallible)) {
+ aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
+ return nullptr;
+ }
+
+ // The new stream holds a reference to the buffer
+ nsCOMPtr<nsIInputStream> stream;
+ nsresult rv = NS_NewByteInputStream(getter_AddRefs(stream), utf8str,
+ NS_ASSIGNMENT_DEPEND);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ aRv.Throw(rv);
+ return nullptr;
+ }
+
+ return ParseFromStream(stream, u"UTF-8"_ns, utf8str.Length(), aType, aRv);
+}
+
+already_AddRefed<Document> DOMParser::ParseFromSafeString(const nsAString& aStr,
+ SupportedType aType,
+ ErrorResult& aRv) {
+ // Create the new document with the same principal as `mOwner`, even if it is
+ // the system principal. This will ensure that nodes from the returned
+ // document are in the same DocGroup as the owner global's document, allowing
+ // nodes to be adopted.
+ nsCOMPtr<nsIPrincipal> docPrincipal = mPrincipal;
+ if (mOwner && mOwner->PrincipalOrNull()) {
+ mPrincipal = mOwner->PrincipalOrNull();
+ }
+
+ RefPtr<Document> ret = ParseFromString(aStr, aType, aRv);
+ mPrincipal = docPrincipal;
+ return ret.forget();
+}
+
+already_AddRefed<Document> DOMParser::ParseFromBuffer(const Uint8Array& aBuf,
+ SupportedType aType,
+ ErrorResult& aRv) {
+ return aBuf.ProcessFixedData([&](const Span<uint8_t>& aData) {
+ return ParseFromBuffer(aData, aType, aRv);
+ });
+}
+
+already_AddRefed<Document> DOMParser::ParseFromBuffer(Span<const uint8_t> aBuf,
+ SupportedType aType,
+ ErrorResult& aRv) {
+ // The new stream holds a reference to the buffer
+ nsCOMPtr<nsIInputStream> stream;
+ nsresult rv = NS_NewByteInputStream(
+ getter_AddRefs(stream),
+ Span(reinterpret_cast<const char*>(aBuf.Elements()), aBuf.Length()),
+ NS_ASSIGNMENT_DEPEND);
+ if (NS_FAILED(rv)) {
+ aRv.Throw(rv);
+ return nullptr;
+ }
+
+ return ParseFromStream(stream, VoidString(), aBuf.Length(), aType, aRv);
+}
+
+already_AddRefed<Document> DOMParser::ParseFromStream(nsIInputStream* aStream,
+ const nsAString& aCharset,
+ int32_t aContentLength,
+ SupportedType aType,
+ ErrorResult& aRv) {
+ bool svg = (aType == SupportedType::Image_svg_xml);
+
+ // For now, we can only create XML documents.
+ // XXXsmaug Should we create an HTMLDocument (in XHTML mode)
+ // for "application/xhtml+xml"?
+ if (aType != SupportedType::Text_xml &&
+ aType != SupportedType::Application_xml &&
+ aType != SupportedType::Application_xhtml_xml && !svg) {
+ aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+ return nullptr;
+ }
+
+ // Put the nsCOMPtr out here so we hold a ref to the stream as needed
+ nsCOMPtr<nsIInputStream> stream = aStream;
+ if (!NS_InputStreamIsBuffered(stream)) {
+ nsCOMPtr<nsIInputStream> bufferedStream;
+ nsresult rv = NS_NewBufferedInputStream(getter_AddRefs(bufferedStream),
+ stream.forget(), 4096);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ aRv.Throw(rv);
+ return nullptr;
+ }
+
+ stream = bufferedStream;
+ }
+
+ nsCOMPtr<Document> document =
+ SetUpDocument(svg ? DocumentFlavorSVG : DocumentFlavorLegacyGuess, aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ // Create a fake channel
+ nsCOMPtr<nsIChannel> parserChannel;
+ NS_NewInputStreamChannel(
+ getter_AddRefs(parserChannel), mDocumentURI,
+ nullptr, // aStream
+ mPrincipal, nsILoadInfo::SEC_FORCE_INHERIT_PRINCIPAL,
+ nsIContentPolicy::TYPE_OTHER,
+ nsDependentCSubstring(SupportedTypeValues::GetString(aType)));
+ if (NS_WARN_IF(!parserChannel)) {
+ aRv.Throw(NS_ERROR_UNEXPECTED);
+ return nullptr;
+ }
+
+ if (!DOMStringIsNull(aCharset)) {
+ parserChannel->SetContentCharset(NS_ConvertUTF16toUTF8(aCharset));
+ }
+
+ // Tell the document to start loading
+ nsCOMPtr<nsIStreamListener> listener;
+
+ // Keep the XULXBL state in sync with the HTML case
+ if (mForceEnableXULXBL) {
+ document->ForceEnableXULXBL();
+ }
+
+ if (mForceEnableDTD) {
+ document->ForceSkipDTDSecurityChecks();
+ }
+
+ // Have to pass false for reset here, else the reset will remove
+ // our event listener. Should that listener addition move to later
+ // than this call?
+ nsresult rv =
+ document->StartDocumentLoad(kLoadAsData, parserChannel, nullptr, nullptr,
+ getter_AddRefs(listener), false);
+
+ if (NS_FAILED(rv) || !listener) {
+ aRv.Throw(NS_ERROR_FAILURE);
+ return nullptr;
+ }
+
+ // Now start pumping data to the listener
+ nsresult status;
+
+ rv = listener->OnStartRequest(parserChannel);
+ if (NS_FAILED(rv)) parserChannel->Cancel(rv);
+ parserChannel->GetStatus(&status);
+
+ if (NS_SUCCEEDED(rv) && NS_SUCCEEDED(status)) {
+ rv = listener->OnDataAvailable(parserChannel, stream, 0, aContentLength);
+ if (NS_FAILED(rv)) parserChannel->Cancel(rv);
+ parserChannel->GetStatus(&status);
+ }
+
+ rv = listener->OnStopRequest(parserChannel, status);
+ // Failure returned from OnStopRequest does not affect the final status of
+ // the channel, so we do not need to call Cancel(rv) as we do above.
+
+ if (NS_FAILED(rv)) {
+ aRv.Throw(NS_ERROR_FAILURE);
+ return nullptr;
+ }
+
+ return document.forget();
+}
+
+/*static */
+already_AddRefed<DOMParser> DOMParser::Constructor(const GlobalObject& aOwner,
+ ErrorResult& rv) {
+ MOZ_ASSERT(NS_IsMainThread());
+ nsCOMPtr<nsIPrincipal> docPrincipal = aOwner.GetSubjectPrincipal();
+ nsCOMPtr<nsIURI> documentURI;
+ nsIURI* baseURI = nullptr;
+ if (docPrincipal->IsSystemPrincipal()) {
+ docPrincipal = NullPrincipal::Create(OriginAttributes());
+ documentURI = docPrincipal->GetURI();
+ } else {
+ // Grab document and base URIs off the window our constructor was
+ // called on. Error out if anything untoward happens.
+ nsCOMPtr<nsPIDOMWindowInner> window =
+ do_QueryInterface(aOwner.GetAsSupports());
+ if (!window) {
+ rv.Throw(NS_ERROR_UNEXPECTED);
+ return nullptr;
+ }
+
+ baseURI = window->GetDocBaseURI();
+ documentURI = window->GetDocumentURI();
+ }
+
+ if (!documentURI) {
+ rv.Throw(NS_ERROR_UNEXPECTED);
+ return nullptr;
+ }
+
+ nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aOwner.GetAsSupports());
+ MOZ_ASSERT(global);
+ RefPtr<DOMParser> domParser =
+ new DOMParser(global, docPrincipal, documentURI, baseURI);
+ return domParser.forget();
+}
+
+// static
+already_AddRefed<DOMParser> DOMParser::CreateWithoutGlobal(ErrorResult& aRv) {
+ nsCOMPtr<nsIPrincipal> docPrincipal =
+ NullPrincipal::Create(OriginAttributes());
+
+ nsCOMPtr<nsIURI> documentURI = docPrincipal->GetURI();
+ if (!documentURI) {
+ aRv.Throw(NS_ERROR_UNEXPECTED);
+ return nullptr;
+ }
+
+ RefPtr<DOMParser> domParser =
+ new DOMParser(nullptr, docPrincipal, documentURI, nullptr);
+ return domParser.forget();
+}
+
+already_AddRefed<Document> DOMParser::SetUpDocument(DocumentFlavor aFlavor,
+ ErrorResult& aRv) {
+ // We should really just use mOwner here, but Document gets confused
+ // if we pass it a scriptHandlingObject that doesn't QI to
+ // nsIScriptGlobalObject, and test_isequalnode.js (an xpcshell test without
+ // a window global) breaks. The correct solution is just to wean Document off
+ // of nsIScriptGlobalObject, but that's a yak to shave another day.
+ nsCOMPtr<nsIScriptGlobalObject> scriptHandlingObject =
+ do_QueryInterface(mOwner);
+
+ // Try to inherit a style backend.
+ NS_ASSERTION(mPrincipal, "Must have principal by now");
+ NS_ASSERTION(mDocumentURI, "Must have document URI by now");
+
+ nsCOMPtr<Document> doc;
+ nsresult rv = NS_NewDOMDocument(getter_AddRefs(doc), u""_ns, u""_ns, nullptr,
+ mDocumentURI, mBaseURI, mPrincipal, true,
+ scriptHandlingObject, aFlavor);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ aRv.Throw(rv);
+ return nullptr;
+ }
+
+ return doc.forget();
+}