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gecko-dev/dom/xml/XMLDocument.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/XMLDocument.h"
#include "nsParserCIID.h"
#include "nsCharsetSource.h"
#include "nsIXMLContentSink.h"
#include "nsPresContext.h"
#include "nsIContent.h"
#include "nsIContentViewerContainer.h"
#include "nsIContentViewer.h"
#include "nsIDocShell.h"
#include "nsHTMLParts.h"
#include "nsIComponentManager.h"
#include "nsIDOMElement.h"
#include "nsIBaseWindow.h"
#include "nsIDOMWindow.h"
#include "nsIDOMDocumentType.h"
#include "nsCOMPtr.h"
#include "nsXPIDLString.h"
#include "nsIHttpChannel.h"
#include "nsIURI.h"
#include "nsIServiceManager.h"
#include "nsNetUtil.h"
#include "nsError.h"
#include "nsIScriptSecurityManager.h"
#include "nsIPrincipal.h"
#include "nsLayoutCID.h"
#include "mozilla/dom/Attr.h"
#include "nsCExternalHandlerService.h"
#include "nsMimeTypes.h"
#include "mozilla/EventListenerManager.h"
#include "nsContentUtils.h"
#include "nsThreadUtils.h"
#include "nsJSUtils.h"
#include "nsCRT.h"
#include "nsIAuthPrompt.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentPolicyUtils.h"
#include "nsIDOMUserDataHandler.h"
#include "nsNodeUtils.h"
#include "nsIConsoleService.h"
#include "nsIScriptError.h"
#include "nsIHTMLDocument.h"
#include "mozilla/BasicEvents.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/XMLDocumentBinding.h"
#include "mozilla/dom/DocumentBinding.h"
using namespace mozilla;
using namespace mozilla::dom;
// ==================================================================
// =
// ==================================================================
nsresult
NS_NewDOMDocument(nsIDOMDocument** aInstancePtrResult,
const nsAString& aNamespaceURI,
const nsAString& aQualifiedName,
nsIDOMDocumentType* aDoctype,
nsIURI* aDocumentURI,
nsIURI* aBaseURI,
nsIPrincipal* aPrincipal,
bool aLoadedAsData,
nsIGlobalObject* aEventObject,
DocumentFlavor aFlavor)
{
// Note: can't require that aDocumentURI/aBaseURI/aPrincipal be non-null,
// since at least one caller (XMLHttpRequest) doesn't have decent args to
// pass in.
nsresult rv;
*aInstancePtrResult = nullptr;
nsCOMPtr<nsIDocument> d;
bool isHTML = false;
bool isXHTML = false;
if (aFlavor == DocumentFlavorSVG) {
rv = NS_NewSVGDocument(getter_AddRefs(d));
} else if (aFlavor == DocumentFlavorHTML) {
rv = NS_NewHTMLDocument(getter_AddRefs(d));
isHTML = true;
} else if (aFlavor == DocumentFlavorPlain) {
rv = NS_NewXMLDocument(getter_AddRefs(d), aLoadedAsData, true);
} else if (aDoctype) {
MOZ_ASSERT(aFlavor == DocumentFlavorLegacyGuess);
nsAutoString publicId, name;
aDoctype->GetPublicId(publicId);
if (publicId.IsEmpty()) {
aDoctype->GetName(name);
}
if (name.EqualsLiteral("html") ||
publicId.EqualsLiteral("-//W3C//DTD HTML 4.01//EN") ||
publicId.EqualsLiteral("-//W3C//DTD HTML 4.01 Frameset//EN") ||
publicId.EqualsLiteral("-//W3C//DTD HTML 4.01 Transitional//EN") ||
publicId.EqualsLiteral("-//W3C//DTD HTML 4.0//EN") ||
publicId.EqualsLiteral("-//W3C//DTD HTML 4.0 Frameset//EN") ||
publicId.EqualsLiteral("-//W3C//DTD HTML 4.0 Transitional//EN")) {
rv = NS_NewHTMLDocument(getter_AddRefs(d));
isHTML = true;
} else if (publicId.EqualsLiteral("-//W3C//DTD XHTML 1.0 Strict//EN") ||
publicId.EqualsLiteral("-//W3C//DTD XHTML 1.0 Transitional//EN") ||
publicId.EqualsLiteral("-//W3C//DTD XHTML 1.0 Frameset//EN")) {
rv = NS_NewHTMLDocument(getter_AddRefs(d));
isHTML = true;
isXHTML = true;
}
else if (publicId.EqualsLiteral("-//W3C//DTD SVG 1.1//EN")) {
rv = NS_NewSVGDocument(getter_AddRefs(d));
}
// XXX Add support for XUL documents.
else {
rv = NS_NewXMLDocument(getter_AddRefs(d));
}
} else {
MOZ_ASSERT(aFlavor == DocumentFlavorLegacyGuess);
rv = NS_NewXMLDocument(getter_AddRefs(d));
}
if (NS_FAILED(rv)) {
return rv;
}
if (nsCOMPtr<nsIScriptGlobalObject> sgo = do_QueryInterface(aEventObject)) {
d->SetScriptHandlingObject(sgo);
} else if (aEventObject){
d->SetScopeObject(aEventObject);
}
if (isHTML) {
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(d);
NS_ASSERTION(htmlDoc, "HTML Document doesn't implement nsIHTMLDocument?");
htmlDoc->SetCompatibilityMode(eCompatibility_FullStandards);
htmlDoc->SetIsXHTML(isXHTML);
}
nsDocument* doc = static_cast<nsDocument*>(d.get());
doc->SetLoadedAsData(aLoadedAsData);
doc->nsDocument::SetDocumentURI(aDocumentURI);
// Must set the principal first, since SetBaseURI checks it.
doc->SetPrincipal(aPrincipal);
doc->SetBaseURI(aBaseURI);
// XMLDocuments and documents "created in memory" get to be UTF-8 by default,
// unlike the legacy HTML mess
doc->SetDocumentCharacterSet(NS_LITERAL_CSTRING("UTF-8"));
if (aDoctype) {
nsCOMPtr<nsIDOMNode> tmpNode;
rv = doc->AppendChild(aDoctype, getter_AddRefs(tmpNode));
NS_ENSURE_SUCCESS(rv, rv);
}
if (!aQualifiedName.IsEmpty()) {
nsCOMPtr<nsIDOMElement> root;
rv = doc->CreateElementNS(aNamespaceURI, aQualifiedName,
getter_AddRefs(root));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> tmpNode;
rv = doc->AppendChild(root, getter_AddRefs(tmpNode));
NS_ENSURE_SUCCESS(rv, rv);
}
*aInstancePtrResult = doc;
NS_ADDREF(*aInstancePtrResult);
return NS_OK;
}
nsresult
NS_NewXMLDocument(nsIDocument** aInstancePtrResult, bool aLoadedAsData,
bool aIsPlainDocument)
{
nsRefPtr<XMLDocument> doc = new XMLDocument();
nsresult rv = doc->Init();
if (NS_FAILED(rv)) {
*aInstancePtrResult = nullptr;
return rv;
}
doc->SetLoadedAsData(aLoadedAsData);
doc->mIsPlainDocument = aIsPlainDocument;
doc.forget(aInstancePtrResult);
return NS_OK;
}
nsresult
NS_NewXBLDocument(nsIDOMDocument** aInstancePtrResult,
nsIURI* aDocumentURI,
nsIURI* aBaseURI,
nsIPrincipal* aPrincipal)
{
nsresult rv = NS_NewDOMDocument(aInstancePtrResult,
NS_LITERAL_STRING("http://www.mozilla.org/xbl"),
NS_LITERAL_STRING("bindings"), nullptr,
aDocumentURI, aBaseURI, aPrincipal, false,
nullptr, DocumentFlavorLegacyGuess);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDocument> idoc = do_QueryInterface(*aInstancePtrResult);
nsDocument* doc = static_cast<nsDocument*>(idoc.get());
doc->SetLoadedAsInteractiveData(true);
doc->SetReadyStateInternal(nsIDocument::READYSTATE_COMPLETE);
return NS_OK;
}
namespace mozilla {
namespace dom {
XMLDocument::XMLDocument(const char* aContentType)
: nsDocument(aContentType),
mAsync(true)
{
// NOTE! nsDocument::operator new() zeroes out all members, so don't
// bother initializing members to 0.
mType = eGenericXML;
}
XMLDocument::~XMLDocument()
{
// XXX We rather crash than hang
mLoopingForSyncLoad = false;
}
// QueryInterface implementation for XMLDocument
NS_IMPL_ISUPPORTS_INHERITED(XMLDocument, nsDocument, nsIDOMXMLDocument)
nsresult
XMLDocument::Init()
{
nsresult rv = nsDocument::Init();
NS_ENSURE_SUCCESS(rv, rv);
return rv;
}
void
XMLDocument::Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup)
{
nsDocument::Reset(aChannel, aLoadGroup);
}
void
XMLDocument::ResetToURI(nsIURI *aURI, nsILoadGroup *aLoadGroup,
nsIPrincipal* aPrincipal)
{
if (mChannelIsPending) {
StopDocumentLoad();
mChannel->Cancel(NS_BINDING_ABORTED);
mChannelIsPending = false;
}
nsDocument::ResetToURI(aURI, aLoadGroup, aPrincipal);
}
NS_IMETHODIMP
XMLDocument::GetAsync(bool *aAsync)
{
NS_ENSURE_ARG_POINTER(aAsync);
*aAsync = mAsync;
return NS_OK;
}
NS_IMETHODIMP
XMLDocument::SetAsync(bool aAsync)
{
mAsync = aAsync;
return NS_OK;
}
NS_IMETHODIMP
XMLDocument::Load(const nsAString& aUrl, bool *aReturn)
{
ErrorResult rv;
*aReturn = Load(aUrl, rv);
return rv.ErrorCode();
}
bool
XMLDocument::Load(const nsAString& aUrl, ErrorResult& aRv)
{
bool hasHadScriptObject = true;
nsIScriptGlobalObject* scriptObject =
GetScriptHandlingObject(hasHadScriptObject);
if (!scriptObject && hasHadScriptObject) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return false;
}
WarnOnceAbout(nsIDocument::eUseOfDOM3LoadMethod);
nsCOMPtr<nsIDocument> callingDoc = nsContentUtils::GetDocumentFromContext();
nsIURI *baseURI = mDocumentURI;
nsAutoCString charset;
if (callingDoc) {
baseURI = callingDoc->GetDocBaseURI();
charset = callingDoc->GetDocumentCharacterSet();
}
// Create a new URI
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), aUrl, charset.get(), baseURI);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return false;
}
// Check to see whether the current document is allowed to load this URI.
// It's important to use the current document's principal for this check so
// that we don't end up in a case where code with elevated privileges is
// calling us and changing the principal of this document.
// Enforce same-origin even for chrome loaders to avoid someone accidentally
// using a document that content has a reference to and turn that into a
// chrome document.
nsCOMPtr<nsIPrincipal> principal = NodePrincipal();
if (!nsContentUtils::IsSystemPrincipal(principal)) {
rv = principal->CheckMayLoad(uri, false, false);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return false;
}
int16_t shouldLoad = nsIContentPolicy::ACCEPT;
rv = NS_CheckContentLoadPolicy(nsIContentPolicy::TYPE_XMLHTTPREQUEST,
uri,
principal,
callingDoc ? callingDoc.get() :
static_cast<nsIDocument*>(this),
NS_LITERAL_CSTRING("application/xml"),
nullptr,
&shouldLoad,
nsContentUtils::GetContentPolicy(),
nsContentUtils::GetSecurityManager());
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return false;
}
if (NS_CP_REJECTED(shouldLoad)) {
aRv.Throw(NS_ERROR_CONTENT_BLOCKED);
return false;
}
} else {
// We're called from chrome, check to make sure the URI we're
// about to load is also chrome.
bool isChrome = false;
if (NS_FAILED(uri->SchemeIs("chrome", &isChrome)) || !isChrome) {
nsAutoCString spec;
if (mDocumentURI)
mDocumentURI->GetSpec(spec);
nsAutoString error;
error.AssignLiteral("Cross site loading using document.load is no "
"longer supported. Use XMLHttpRequest instead.");
nsCOMPtr<nsIScriptError> errorObject =
do_CreateInstance(NS_SCRIPTERROR_CONTRACTID, &rv);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return false;
}
rv = errorObject->InitWithWindowID(error,
NS_ConvertUTF8toUTF16(spec),
EmptyString(),
0, 0, nsIScriptError::warningFlag,
"DOM",
callingDoc ?
callingDoc->InnerWindowID() :
this->InnerWindowID());
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return false;
}
nsCOMPtr<nsIConsoleService> consoleService =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
if (consoleService) {
consoleService->LogMessage(errorObject);
}
aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
return false;
}
}
// Partial Reset, need to restore principal for security reasons and
// event listener manager so that load listeners etc. will
// remain. This should be done before the security check is done to
// ensure that the document is reset even if the new document can't
// be loaded. Note that we need to hold a strong ref to |principal|
// here, because ResetToURI will null out our node principal before
// setting the new one.
nsRefPtr<EventListenerManager> elm(mListenerManager);
mListenerManager = nullptr;
// When we are called from JS we can find the load group for the page,
// and add ourselves to it. This way any pending requests
// will be automatically aborted if the user leaves the page.
nsCOMPtr<nsILoadGroup> loadGroup;
if (callingDoc) {
loadGroup = callingDoc->GetDocumentLoadGroup();
}
ResetToURI(uri, loadGroup, principal);
mListenerManager = elm;
// Create a channel
nsCOMPtr<nsIInterfaceRequestor> req = nsContentUtils::GetSameOriginChecker();
if (!req) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return false;
}
nsCOMPtr<nsIChannel> channel;
// nsIRequest::LOAD_BACKGROUND prevents throbber from becoming active,
// which in turn keeps STOP button from becoming active
rv = NS_NewChannel(getter_AddRefs(channel), uri, nullptr, loadGroup, req,
nsIRequest::LOAD_BACKGROUND);
if (NS_FAILED(rv)) {
aRv.Throw(rv);
return false;
}
// StartDocumentLoad asserts that readyState is uninitialized, so
// uninitialize it. SetReadyStateInternal make this transition invisible to
// Web content. But before doing that, assert that the current readyState
// is complete as it should be after the call to ResetToURI() above.
MOZ_ASSERT(GetReadyStateEnum() == nsIDocument::READYSTATE_COMPLETE,
"Bad readyState");
SetReadyStateInternal(nsIDocument::READYSTATE_UNINITIALIZED);
// Prepare for loading the XML document "into oneself"
nsCOMPtr<nsIStreamListener> listener;
if (NS_FAILED(rv = StartDocumentLoad(kLoadAsData, channel,
loadGroup, nullptr,
getter_AddRefs(listener),
false))) {
NS_ERROR("XMLDocument::Load: Failed to start the document load.");
aRv.Throw(rv);
return false;
}
// After this point, if we error out of this method we should clear
// mChannelIsPending.
// Start an asynchronous read of the XML document
rv = channel->AsyncOpen(listener, nullptr);
if (NS_FAILED(rv)) {
mChannelIsPending = false;
aRv.Throw(rv);
return false;
}
if (!mAsync) {
nsCOMPtr<nsIThread> thread = do_GetCurrentThread();
nsAutoSyncOperation sync(this);
mLoopingForSyncLoad = true;
while (mLoopingForSyncLoad) {
if (!NS_ProcessNextEvent(thread))
break;
}
// We set return to true unless there was a parsing error
Element* rootElement = GetRootElement();
if (!rootElement) {
return false;
}
if (rootElement->LocalName().EqualsLiteral("parsererror")) {
nsAutoString ns;
rootElement->GetNamespaceURI(ns);
if (ns.EqualsLiteral("http://www.mozilla.org/newlayout/xml/parsererror.xml")) {
return false;
}
}
}
return true;
}
nsresult
XMLDocument::StartDocumentLoad(const char* aCommand,
nsIChannel* aChannel,
nsILoadGroup* aLoadGroup,
nsISupports* aContainer,
nsIStreamListener **aDocListener,
bool aReset,
nsIContentSink* aSink)
{
nsresult rv = nsDocument::StartDocumentLoad(aCommand,
aChannel, aLoadGroup,
aContainer,
aDocListener, aReset, aSink);
if (NS_FAILED(rv)) return rv;
if (nsCRT::strcmp("loadAsInteractiveData", aCommand) == 0) {
mLoadedAsInteractiveData = true;
aCommand = kLoadAsData; // XBL, for example, needs scripts and styles
}
int32_t charsetSource = kCharsetFromDocTypeDefault;
nsAutoCString charset(NS_LITERAL_CSTRING("UTF-8"));
TryChannelCharset(aChannel, charsetSource, charset, nullptr);
nsCOMPtr<nsIURI> aUrl;
rv = aChannel->GetURI(getter_AddRefs(aUrl));
if (NS_FAILED(rv)) return rv;
static NS_DEFINE_CID(kCParserCID, NS_PARSER_CID);
mParser = do_CreateInstance(kCParserCID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIXMLContentSink> sink;
if (aSink) {
sink = do_QueryInterface(aSink);
}
else {
nsCOMPtr<nsIDocShell> docShell;
if (aContainer) {
docShell = do_QueryInterface(aContainer);
NS_ENSURE_TRUE(docShell, NS_ERROR_FAILURE);
}
rv = NS_NewXMLContentSink(getter_AddRefs(sink), this, aUrl, docShell,
aChannel);
NS_ENSURE_SUCCESS(rv, rv);
}
// Set the parser as the stream listener for the document loader...
rv = CallQueryInterface(mParser, aDocListener);
NS_ENSURE_SUCCESS(rv, rv);
NS_ASSERTION(mChannel, "How can we not have a channel here?");
mChannelIsPending = true;
SetDocumentCharacterSet(charset);
mParser->SetDocumentCharset(charset, charsetSource);
mParser->SetCommand(aCommand);
mParser->SetContentSink(sink);
mParser->Parse(aUrl, nullptr, (void *)this);
return NS_OK;
}
void
XMLDocument::EndLoad()
{
mChannelIsPending = false;
mLoopingForSyncLoad = false;
mSynchronousDOMContentLoaded = (mLoadedAsData || mLoadedAsInteractiveData);
nsDocument::EndLoad();
if (mSynchronousDOMContentLoaded) {
mSynchronousDOMContentLoaded = false;
nsDocument::SetReadyStateInternal(nsIDocument::READYSTATE_COMPLETE);
// Generate a document load event for the case when an XML
// document was loaded as pure data without any presentation
// attached to it.
WidgetEvent event(true, NS_LOAD);
EventDispatcher::Dispatch(static_cast<nsIDocument*>(this), nullptr, &event);
}
}
/* virtual */ void
XMLDocument::DocAddSizeOfExcludingThis(nsWindowSizes* aWindowSizes) const
{
nsDocument::DocAddSizeOfExcludingThis(aWindowSizes);
}
// nsIDOMDocument interface
nsresult
XMLDocument::Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult) const
{
NS_ASSERTION(aNodeInfo->NodeInfoManager() == mNodeInfoManager,
"Can't import this document into another document!");
nsRefPtr<XMLDocument> clone = new XMLDocument();
nsresult rv = CloneDocHelper(clone);
NS_ENSURE_SUCCESS(rv, rv);
// State from XMLDocument
clone->mAsync = mAsync;
clone->mIsPlainDocument = mIsPlainDocument;
return CallQueryInterface(clone.get(), aResult);
}
JSObject*
XMLDocument::WrapNode(JSContext *aCx)
{
if (mIsPlainDocument) {
return DocumentBinding::Wrap(aCx, this);
}
return XMLDocumentBinding::Wrap(aCx, this);
}
} // namespace dom
} // namespace mozilla
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