1504 lines
51 KiB
C++
1504 lines
51 KiB
C++
/*
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* Copyright (C) 2000 Peter Kelly <pmk@post.com>
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* Copyright (C) 2005-2017 Apple Inc. All rights reserved.
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* Copyright (C) 2006 Alexey Proskuryakov <ap@webkit.org>
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* Copyright (C) 2007 Samuel Weinig <sam@webkit.org>
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* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
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* Copyright (C) 2008 Holger Hans Peter Freyther
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* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
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* Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
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* Copyright (C) 2013 Samsung Electronics. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "XMLDocumentParser.h"
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#include "CDATASection.h"
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#include "Comment.h"
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#include "CachedResourceLoader.h"
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#include "Document.h"
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#include "DocumentFragment.h"
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#include "DocumentType.h"
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#include "Frame.h"
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#include "FrameLoader.h"
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#include "HTMLEntityParser.h"
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#include "HTMLHtmlElement.h"
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#include "HTMLParserIdioms.h"
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#include "HTMLTemplateElement.h"
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#include "HTTPParsers.h"
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#include "InlineClassicScript.h"
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#include "MIMETypeRegistry.h"
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#include "Page.h"
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#include "PageConsoleClient.h"
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#include "PendingScript.h"
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#include "ProcessingInstruction.h"
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#include "ResourceError.h"
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#include "ResourceResponse.h"
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#include "SVGElement.h"
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#include "ScriptElement.h"
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#include "ScriptSourceCode.h"
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#include "Settings.h"
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#include "SharedBuffer.h"
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#include "StyleScope.h"
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#include "TransformSource.h"
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#include "XMLNSNames.h"
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#include "XMLDocumentParserScope.h"
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#include <libxml/parserInternals.h>
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#include <wtf/unicode/CharacterNames.h>
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#include <wtf/unicode/UTF8Conversion.h>
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#if ENABLE(XSLT)
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#include "XMLTreeViewer.h"
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#include <libxslt/xslt.h>
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#endif
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namespace WebCore {
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#if ENABLE(XSLT)
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static inline bool shouldRenderInXMLTreeViewerMode(Document& document)
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{
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if (document.sawElementsInKnownNamespaces())
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return false;
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if (document.transformSourceDocument())
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return false;
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auto* frame = document.frame();
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if (!frame)
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return false;
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if (!frame->settings().developerExtrasEnabled())
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return false;
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if (frame->tree().parent())
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return false; // This document is not in a top frame
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return true;
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}
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#endif
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class PendingCallbacks {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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void appendStartElementNSCallback(const xmlChar* xmlLocalName, const xmlChar* xmlPrefix, const xmlChar* xmlURI, int numNamespaces, const xmlChar** namespaces, int numAttributes, int numDefaulted, const xmlChar** attributes)
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{
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auto callback = makeUnique<PendingStartElementNSCallback>();
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callback->xmlLocalName = xmlStrdup(xmlLocalName);
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callback->xmlPrefix = xmlStrdup(xmlPrefix);
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callback->xmlURI = xmlStrdup(xmlURI);
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callback->numNamespaces = numNamespaces;
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callback->namespaces = static_cast<xmlChar**>(xmlMalloc(sizeof(xmlChar*) * numNamespaces * 2));
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for (int i = 0; i < numNamespaces * 2 ; i++)
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callback->namespaces[i] = xmlStrdup(namespaces[i]);
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callback->numAttributes = numAttributes;
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callback->numDefaulted = numDefaulted;
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callback->attributes = static_cast<xmlChar**>(xmlMalloc(sizeof(xmlChar*) * numAttributes * 5));
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for (int i = 0; i < numAttributes; i++) {
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// Each attribute has 5 elements in the array:
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// name, prefix, uri, value and an end pointer.
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for (int j = 0; j < 3; j++)
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callback->attributes[i * 5 + j] = xmlStrdup(attributes[i * 5 + j]);
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int len = attributes[i * 5 + 4] - attributes[i * 5 + 3];
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callback->attributes[i * 5 + 3] = xmlStrndup(attributes[i * 5 + 3], len);
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callback->attributes[i * 5 + 4] = callback->attributes[i * 5 + 3] + len;
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}
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m_callbacks.append(WTFMove(callback));
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}
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void appendEndElementNSCallback()
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{
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m_callbacks.append(makeUnique<PendingEndElementNSCallback>());
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}
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void appendCharactersCallback(const xmlChar* s, int len)
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{
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auto callback = makeUnique<PendingCharactersCallback>();
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callback->s = xmlStrndup(s, len);
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callback->len = len;
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m_callbacks.append(WTFMove(callback));
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}
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void appendProcessingInstructionCallback(const xmlChar* target, const xmlChar* data)
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{
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auto callback = makeUnique<PendingProcessingInstructionCallback>();
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callback->target = xmlStrdup(target);
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callback->data = xmlStrdup(data);
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m_callbacks.append(WTFMove(callback));
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}
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void appendCDATABlockCallback(const xmlChar* s, int len)
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{
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auto callback = makeUnique<PendingCDATABlockCallback>();
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callback->s = xmlStrndup(s, len);
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callback->len = len;
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m_callbacks.append(WTFMove(callback));
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}
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void appendCommentCallback(const xmlChar* s)
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{
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auto callback = makeUnique<PendingCommentCallback>();
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callback->s = xmlStrdup(s);
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m_callbacks.append(WTFMove(callback));
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}
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void appendInternalSubsetCallback(const xmlChar* name, const xmlChar* externalID, const xmlChar* systemID)
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{
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auto callback = makeUnique<PendingInternalSubsetCallback>();
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callback->name = xmlStrdup(name);
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callback->externalID = xmlStrdup(externalID);
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callback->systemID = xmlStrdup(systemID);
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m_callbacks.append(WTFMove(callback));
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}
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void appendErrorCallback(XMLErrors::ErrorType type, const xmlChar* message, OrdinalNumber lineNumber, OrdinalNumber columnNumber)
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{
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auto callback = makeUnique<PendingErrorCallback>();
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callback->message = xmlStrdup(message);
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callback->type = type;
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callback->lineNumber = lineNumber;
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callback->columnNumber = columnNumber;
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m_callbacks.append(WTFMove(callback));
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}
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void callAndRemoveFirstCallback(XMLDocumentParser* parser)
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{
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std::unique_ptr<PendingCallback> callback = m_callbacks.takeFirst();
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callback->call(parser);
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}
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bool isEmpty() const { return m_callbacks.isEmpty(); }
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private:
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struct PendingCallback {
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WTF_MAKE_STRUCT_FAST_ALLOCATED;
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virtual ~PendingCallback() = default;
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virtual void call(XMLDocumentParser* parser) = 0;
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};
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struct PendingStartElementNSCallback : public PendingCallback {
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virtual ~PendingStartElementNSCallback()
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{
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xmlFree(xmlLocalName);
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xmlFree(xmlPrefix);
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xmlFree(xmlURI);
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for (int i = 0; i < numNamespaces * 2; i++)
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xmlFree(namespaces[i]);
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xmlFree(namespaces);
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for (int i = 0; i < numAttributes; i++) {
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for (int j = 0; j < 4; j++)
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xmlFree(attributes[i * 5 + j]);
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}
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xmlFree(attributes);
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}
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void call(XMLDocumentParser* parser) override
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{
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parser->startElementNs(xmlLocalName, xmlPrefix, xmlURI, numNamespaces, const_cast<const xmlChar**>(namespaces), numAttributes, numDefaulted, const_cast<const xmlChar**>(attributes));
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}
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xmlChar* xmlLocalName;
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xmlChar* xmlPrefix;
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xmlChar* xmlURI;
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int numNamespaces;
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xmlChar** namespaces;
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int numAttributes;
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int numDefaulted;
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xmlChar** attributes;
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};
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struct PendingEndElementNSCallback : public PendingCallback {
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void call(XMLDocumentParser* parser) override
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{
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parser->endElementNs();
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}
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};
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struct PendingCharactersCallback : public PendingCallback {
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virtual ~PendingCharactersCallback()
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{
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xmlFree(s);
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}
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void call(XMLDocumentParser* parser) override
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{
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parser->characters(s, len);
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}
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xmlChar* s;
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int len;
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};
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struct PendingProcessingInstructionCallback : public PendingCallback {
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virtual ~PendingProcessingInstructionCallback()
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{
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xmlFree(target);
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xmlFree(data);
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}
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void call(XMLDocumentParser* parser) override
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{
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parser->processingInstruction(target, data);
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}
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xmlChar* target;
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xmlChar* data;
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};
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struct PendingCDATABlockCallback : public PendingCallback {
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virtual ~PendingCDATABlockCallback()
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{
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xmlFree(s);
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}
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void call(XMLDocumentParser* parser) override
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{
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parser->cdataBlock(s, len);
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}
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xmlChar* s;
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int len;
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};
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struct PendingCommentCallback : public PendingCallback {
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virtual ~PendingCommentCallback()
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{
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xmlFree(s);
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}
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void call(XMLDocumentParser* parser) override
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{
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parser->comment(s);
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}
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xmlChar* s;
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};
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struct PendingInternalSubsetCallback : public PendingCallback {
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virtual ~PendingInternalSubsetCallback()
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{
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xmlFree(name);
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xmlFree(externalID);
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xmlFree(systemID);
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}
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void call(XMLDocumentParser* parser) override
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{
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parser->internalSubset(name, externalID, systemID);
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}
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xmlChar* name;
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xmlChar* externalID;
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xmlChar* systemID;
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};
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struct PendingErrorCallback: public PendingCallback {
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virtual ~PendingErrorCallback()
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{
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xmlFree(message);
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}
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void call(XMLDocumentParser* parser) override
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{
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parser->handleError(type, reinterpret_cast<char*>(message), TextPosition(lineNumber, columnNumber));
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}
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XMLErrors::ErrorType type;
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xmlChar* message;
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OrdinalNumber lineNumber;
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OrdinalNumber columnNumber;
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};
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Deque<std::unique_ptr<PendingCallback>> m_callbacks;
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};
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// --------------------------------
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static int globalDescriptor = 0;
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static Thread* libxmlLoaderThread { nullptr };
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static int matchFunc(const char*)
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{
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// Only match loads initiated due to uses of libxml2 from within XMLDocumentParser to avoid
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// interfering with client applications that also use libxml2. http://bugs.webkit.org/show_bug.cgi?id=17353
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return XMLDocumentParserScope::currentCachedResourceLoader && libxmlLoaderThread == &Thread::current();
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}
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class OffsetBuffer {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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OffsetBuffer(Vector<uint8_t>&& buffer)
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: m_buffer(WTFMove(buffer))
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{
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}
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int readOutBytes(char* outputBuffer, unsigned askedToRead)
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{
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unsigned bytesLeft = m_buffer.size() - m_currentOffset;
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unsigned lenToCopy = std::min(askedToRead, bytesLeft);
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if (lenToCopy) {
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memcpy(outputBuffer, m_buffer.data() + m_currentOffset, lenToCopy);
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m_currentOffset += lenToCopy;
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}
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return lenToCopy;
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}
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private:
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Vector<uint8_t> m_buffer;
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unsigned m_currentOffset { 0 };
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};
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static bool externalEntityMimeTypeAllowed(const ResourceResponse& response)
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{
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String contentType = response.httpHeaderField(HTTPHeaderName::ContentType);
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String mimeType = extractMIMETypeFromMediaType(contentType);
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if (mimeType.isEmpty()) {
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// Same logic as XMLHttpRequest::responseMIMEType(). Keep them in sync.
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if (response.isInHTTPFamily())
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mimeType = contentType;
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else
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mimeType = response.mimeType();
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}
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return MIMETypeRegistry::isXMLMIMEType(mimeType) || MIMETypeRegistry::isXMLEntityMIMEType(mimeType);
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}
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static inline void setAttributes(Element* element, Vector<Attribute>& attributeVector, ParserContentPolicy parserContentPolicy)
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{
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if (!scriptingContentIsAllowed(parserContentPolicy))
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element->stripScriptingAttributes(attributeVector);
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element->parserSetAttributes(attributeVector);
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}
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static void switchToUTF16(xmlParserCtxtPtr ctxt)
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{
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// Hack around libxml2's lack of encoding overide support by manually
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// resetting the encoding to UTF-16 before every chunk. Otherwise libxml
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// will detect <?xml version="1.0" encoding="<encoding name>"?> blocks
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// and switch encodings, causing the parse to fail.
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// FIXME: Can we just use XML_PARSE_IGNORE_ENC now?
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const unsigned char BOMHighByte = *reinterpret_cast<const unsigned char*>(&byteOrderMark);
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xmlSwitchEncoding(ctxt, BOMHighByte == 0xFF ? XML_CHAR_ENCODING_UTF16LE : XML_CHAR_ENCODING_UTF16BE);
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}
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static bool shouldAllowExternalLoad(const URL& url)
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{
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String urlString = url.string();
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// On non-Windows platforms libxml asks for this URL, the "XML_XML_DEFAULT_CATALOG", on initialization.
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if (urlString == "file:///etc/xml/catalog")
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return false;
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// On Windows, libxml computes a URL relative to where its DLL resides.
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if (startsWithLettersIgnoringASCIICase(urlString, "file:///") && urlString.endsWithIgnoringASCIICase("/etc/catalog"))
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return false;
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// The most common DTD. There isn't much point in hammering www.w3c.org by requesting this for every XHTML document.
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if (startsWithLettersIgnoringASCIICase(urlString, "http://www.w3.org/tr/xhtml"))
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return false;
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// Similarly, there isn't much point in requesting the SVG DTD.
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if (startsWithLettersIgnoringASCIICase(urlString, "http://www.w3.org/graphics/svg"))
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return false;
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// The libxml doesn't give us a lot of context for deciding whether to
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// allow this request. In the worst case, this load could be for an
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// external entity and the resulting document could simply read the
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// retrieved content. If we had more context, we could potentially allow
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// the parser to load a DTD. As things stand, we take the conservative
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// route and allow same-origin requests only.
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if (!XMLDocumentParserScope::currentCachedResourceLoader->document()->securityOrigin().canRequest(url)) {
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XMLDocumentParserScope::currentCachedResourceLoader->printAccessDeniedMessage(url);
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return false;
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}
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return true;
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}
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static void* openFunc(const char* uri)
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{
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ASSERT(XMLDocumentParserScope::currentCachedResourceLoader);
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ASSERT(libxmlLoaderThread == &Thread::current());
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CachedResourceLoader& cachedResourceLoader = *XMLDocumentParserScope::currentCachedResourceLoader;
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Document* document = cachedResourceLoader.document();
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// Same logic as HTMLBaseElement::href(). Keep them in sync.
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auto* encoding = (document && document->decoder()) ? document->decoder()->encodingForURLParsing() : nullptr;
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URL url(document ? document->fallbackBaseURL() : URL(), stripLeadingAndTrailingHTMLSpaces(uri), encoding);
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if (!shouldAllowExternalLoad(url))
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return &globalDescriptor;
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ResourceResponse response;
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RefPtr<SharedBuffer> data;
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{
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ResourceError error;
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XMLDocumentParserScope scope(nullptr);
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// FIXME: We should restore the original global error handler as well.
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if (cachedResourceLoader.frame()) {
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FetchOptions options;
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options.mode = FetchOptions::Mode::SameOrigin;
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options.credentials = FetchOptions::Credentials::Include;
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cachedResourceLoader.frame()->loader().loadResourceSynchronously(url, ClientCredentialPolicy::MayAskClientForCredentials, options, { }, error, response, data);
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if (response.url().isEmpty()) {
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if (Page* page = document ? document->page() : nullptr)
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page->console().addMessage(MessageSource::Security, MessageLevel::Error, makeString("Did not parse external entity resource at '", url.stringCenterEllipsizedToLength(), "' because cross-origin loads are not allowed."));
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return &globalDescriptor;
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}
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if (!externalEntityMimeTypeAllowed(response)) {
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if (Page* page = document ? document->page() : nullptr)
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page->console().addMessage(MessageSource::Security, MessageLevel::Error, makeString("Did not parse external entity resource at '", url.stringCenterEllipsizedToLength(), "' because only XML MIME types are allowed."));
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return &globalDescriptor;
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}
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}
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}
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if (!data)
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return &globalDescriptor;
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return new OffsetBuffer({ data->data(), data->size() });
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}
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static int readFunc(void* context, char* buffer, int len)
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{
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// Do 0-byte reads in case of a null descriptor
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if (context == &globalDescriptor)
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return 0;
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OffsetBuffer* data = static_cast<OffsetBuffer*>(context);
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return data->readOutBytes(buffer, len);
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}
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static int writeFunc(void*, const char*, int)
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{
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// Always just do 0-byte writes
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return 0;
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}
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static int closeFunc(void* context)
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{
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if (context != &globalDescriptor) {
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OffsetBuffer* data = static_cast<OffsetBuffer*>(context);
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delete data;
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}
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return 0;
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}
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#if ENABLE(XSLT)
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static void errorFunc(void*, const char*, ...)
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{
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// FIXME: It would be nice to display error messages somewhere.
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}
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#endif
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static void initializeXMLParser()
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{
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static std::once_flag flag;
|
|
std::call_once(flag, [&] {
|
|
xmlInitParser();
|
|
xmlRegisterInputCallbacks(matchFunc, openFunc, readFunc, closeFunc);
|
|
xmlRegisterOutputCallbacks(matchFunc, openFunc, writeFunc, closeFunc);
|
|
libxmlLoaderThread = &Thread::current();
|
|
});
|
|
}
|
|
|
|
Ref<XMLParserContext> XMLParserContext::createStringParser(xmlSAXHandlerPtr handlers, void* userData)
|
|
{
|
|
initializeXMLParser();
|
|
|
|
xmlParserCtxtPtr parser = xmlCreatePushParserCtxt(handlers, 0, 0, 0, 0);
|
|
parser->_private = userData;
|
|
|
|
// Substitute entities.
|
|
xmlCtxtUseOptions(parser, XML_PARSE_NOENT | XML_PARSE_HUGE);
|
|
|
|
switchToUTF16(parser);
|
|
|
|
return adoptRef(*new XMLParserContext(parser));
|
|
}
|
|
|
|
|
|
// Chunk should be encoded in UTF-8
|
|
RefPtr<XMLParserContext> XMLParserContext::createMemoryParser(xmlSAXHandlerPtr handlers, void* userData, const CString& chunk)
|
|
{
|
|
initializeXMLParser();
|
|
|
|
// appendFragmentSource() checks that the length doesn't overflow an int.
|
|
xmlParserCtxtPtr parser = xmlCreateMemoryParserCtxt(chunk.data(), chunk.length());
|
|
|
|
if (!parser)
|
|
return 0;
|
|
|
|
memcpy(parser->sax, handlers, sizeof(xmlSAXHandler));
|
|
|
|
// Substitute entities.
|
|
// FIXME: Why is XML_PARSE_NODICT needed? This is different from what createStringParser does.
|
|
xmlCtxtUseOptions(parser, XML_PARSE_NODICT | XML_PARSE_NOENT | XML_PARSE_HUGE);
|
|
|
|
// Internal initialization
|
|
parser->sax2 = 1;
|
|
parser->instate = XML_PARSER_CONTENT; // We are parsing a CONTENT
|
|
parser->depth = 0;
|
|
parser->str_xml = xmlDictLookup(parser->dict, reinterpret_cast<xmlChar*>(const_cast<char*>("xml")), 3);
|
|
parser->str_xmlns = xmlDictLookup(parser->dict, reinterpret_cast<xmlChar*>(const_cast<char*>("xmlns")), 5);
|
|
parser->str_xml_ns = xmlDictLookup(parser->dict, XML_XML_NAMESPACE, 36);
|
|
parser->_private = userData;
|
|
|
|
return adoptRef(*new XMLParserContext(parser));
|
|
}
|
|
|
|
// --------------------------------
|
|
|
|
bool XMLDocumentParser::supportsXMLVersion(const String& version)
|
|
{
|
|
return version == "1.0";
|
|
}
|
|
|
|
XMLDocumentParser::XMLDocumentParser(Document& document, FrameView* frameView)
|
|
: ScriptableDocumentParser(document)
|
|
, m_view(frameView)
|
|
, m_pendingCallbacks(makeUnique<PendingCallbacks>())
|
|
, m_currentNode(&document)
|
|
, m_scriptStartPosition(TextPosition::belowRangePosition())
|
|
{
|
|
}
|
|
|
|
XMLDocumentParser::XMLDocumentParser(DocumentFragment& fragment, HashMap<AtomString, AtomString>&& prefixToNamespaceMap, const AtomString& defaultNamespaceURI, ParserContentPolicy parserContentPolicy)
|
|
: ScriptableDocumentParser(fragment.document(), parserContentPolicy)
|
|
, m_pendingCallbacks(makeUnique<PendingCallbacks>())
|
|
, m_currentNode(&fragment)
|
|
, m_scriptStartPosition(TextPosition::belowRangePosition())
|
|
, m_parsingFragment(true)
|
|
, m_prefixToNamespaceMap(WTFMove(prefixToNamespaceMap))
|
|
, m_defaultNamespaceURI(defaultNamespaceURI)
|
|
{
|
|
fragment.ref();
|
|
}
|
|
|
|
XMLParserContext::~XMLParserContext()
|
|
{
|
|
if (m_context->myDoc)
|
|
xmlFreeDoc(m_context->myDoc);
|
|
xmlFreeParserCtxt(m_context);
|
|
}
|
|
|
|
XMLDocumentParser::~XMLDocumentParser()
|
|
{
|
|
// The XMLDocumentParser will always be detached before being destroyed.
|
|
ASSERT(m_currentNodeStack.isEmpty());
|
|
ASSERT(!m_currentNode);
|
|
|
|
// FIXME: m_pendingScript handling should be moved into XMLDocumentParser.cpp!
|
|
if (m_pendingScript)
|
|
m_pendingScript->clearClient();
|
|
}
|
|
|
|
void XMLDocumentParser::doWrite(const String& parseString)
|
|
{
|
|
ASSERT(!isDetached());
|
|
if (!m_context)
|
|
initializeParserContext();
|
|
|
|
// Protect the libxml context from deletion during a callback
|
|
RefPtr<XMLParserContext> context = m_context;
|
|
|
|
// libXML throws an error if you try to switch the encoding for an empty string.
|
|
if (parseString.length()) {
|
|
// JavaScript may cause the parser to detach during xmlParseChunk
|
|
// keep this alive until this function is done.
|
|
Ref<XMLDocumentParser> protectedThis(*this);
|
|
|
|
XMLDocumentParserScope scope(&document()->cachedResourceLoader());
|
|
|
|
// FIXME: Can we parse 8-bit strings directly as Latin-1 instead of upconverting to UTF-16?
|
|
switchToUTF16(context->context());
|
|
xmlParseChunk(context->context(), reinterpret_cast<const char*>(StringView(parseString).upconvertedCharacters().get()), sizeof(UChar) * parseString.length(), 0);
|
|
|
|
// JavaScript (which may be run under the xmlParseChunk callstack) may
|
|
// cause the parser to be stopped or detached.
|
|
if (isStopped())
|
|
return;
|
|
}
|
|
|
|
// FIXME: Why is this here? And why is it after we process the passed source?
|
|
if (document()->decoder() && document()->decoder()->sawError()) {
|
|
// If the decoder saw an error, report it as fatal (stops parsing)
|
|
TextPosition position(OrdinalNumber::fromOneBasedInt(context->context()->input->line), OrdinalNumber::fromOneBasedInt(context->context()->input->col));
|
|
handleError(XMLErrors::fatal, "Encoding error", position);
|
|
}
|
|
}
|
|
|
|
static inline String toString(const xmlChar* string, size_t size)
|
|
{
|
|
return String::fromUTF8(reinterpret_cast<const char*>(string), size);
|
|
}
|
|
|
|
static inline String toString(const xmlChar* string)
|
|
{
|
|
return String::fromUTF8(reinterpret_cast<const char*>(string));
|
|
}
|
|
|
|
static inline AtomString toAtomString(const xmlChar* string, size_t size)
|
|
{
|
|
return AtomString::fromUTF8(reinterpret_cast<const char*>(string), size);
|
|
}
|
|
|
|
static inline AtomString toAtomString(const xmlChar* string)
|
|
{
|
|
return AtomString::fromUTF8(reinterpret_cast<const char*>(string));
|
|
}
|
|
|
|
struct _xmlSAX2Namespace {
|
|
const xmlChar* prefix;
|
|
const xmlChar* uri;
|
|
};
|
|
typedef struct _xmlSAX2Namespace xmlSAX2Namespace;
|
|
|
|
static inline bool handleNamespaceAttributes(Vector<Attribute>& prefixedAttributes, const xmlChar** libxmlNamespaces, int numNamespaces)
|
|
{
|
|
xmlSAX2Namespace* namespaces = reinterpret_cast<xmlSAX2Namespace*>(libxmlNamespaces);
|
|
for (int i = 0; i < numNamespaces; i++) {
|
|
AtomString namespaceQName = xmlnsAtom();
|
|
AtomString namespaceURI = toAtomString(namespaces[i].uri);
|
|
if (namespaces[i].prefix)
|
|
namespaceQName = "xmlns:" + toString(namespaces[i].prefix);
|
|
|
|
auto result = Element::parseAttributeName(XMLNSNames::xmlnsNamespaceURI, namespaceQName);
|
|
if (result.hasException())
|
|
return false;
|
|
|
|
prefixedAttributes.append(Attribute(result.releaseReturnValue(), namespaceURI));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
struct _xmlSAX2Attributes {
|
|
const xmlChar* localname;
|
|
const xmlChar* prefix;
|
|
const xmlChar* uri;
|
|
const xmlChar* value;
|
|
const xmlChar* end;
|
|
};
|
|
typedef struct _xmlSAX2Attributes xmlSAX2Attributes;
|
|
|
|
static inline bool handleElementAttributes(Vector<Attribute>& prefixedAttributes, const xmlChar** libxmlAttributes, int numAttributes)
|
|
{
|
|
xmlSAX2Attributes* attributes = reinterpret_cast<xmlSAX2Attributes*>(libxmlAttributes);
|
|
for (int i = 0; i < numAttributes; i++) {
|
|
int valueLength = static_cast<int>(attributes[i].end - attributes[i].value);
|
|
AtomString attrValue = toAtomString(attributes[i].value, valueLength);
|
|
String attrPrefix = toString(attributes[i].prefix);
|
|
AtomString attrURI = attrPrefix.isEmpty() ? nullAtom() : toAtomString(attributes[i].uri);
|
|
AtomString attrQName = attrPrefix.isEmpty() ? toAtomString(attributes[i].localname) : attrPrefix + ":" + toString(attributes[i].localname);
|
|
|
|
auto result = Element::parseAttributeName(attrURI, attrQName);
|
|
if (result.hasException())
|
|
return false;
|
|
|
|
prefixedAttributes.append(Attribute(result.releaseReturnValue(), attrValue));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// This is a hack around https://bugzilla.gnome.org/show_bug.cgi?id=502960
|
|
// Otherwise libxml doesn't include namespace for parsed entities, breaking entity
|
|
// expansion for all entities containing elements.
|
|
static inline bool hackAroundLibXMLEntityParsingBug()
|
|
{
|
|
#if LIBXML_VERSION >= 20704
|
|
// This bug has been fixed in libxml 2.7.4.
|
|
return false;
|
|
#else
|
|
return true;
|
|
#endif
|
|
}
|
|
|
|
void XMLDocumentParser::startElementNs(const xmlChar* xmlLocalName, const xmlChar* xmlPrefix, const xmlChar* xmlURI, int numNamespaces, const xmlChar** libxmlNamespaces, int numAttributes, int numDefaulted, const xmlChar** libxmlAttributes)
|
|
{
|
|
if (isStopped())
|
|
return;
|
|
|
|
if (m_parserPaused) {
|
|
m_pendingCallbacks->appendStartElementNSCallback(xmlLocalName, xmlPrefix, xmlURI, numNamespaces, libxmlNamespaces, numAttributes, numDefaulted, libxmlAttributes);
|
|
return;
|
|
}
|
|
|
|
if (!updateLeafTextNode())
|
|
return;
|
|
|
|
AtomString localName = toAtomString(xmlLocalName);
|
|
AtomString uri = toAtomString(xmlURI);
|
|
AtomString prefix = toAtomString(xmlPrefix);
|
|
|
|
if (m_parsingFragment && uri.isNull()) {
|
|
if (!prefix.isNull())
|
|
uri = m_prefixToNamespaceMap.get(prefix);
|
|
else if (is<SVGElement>(m_currentNode) || localName == SVGNames::svgTag->localName())
|
|
uri = SVGNames::svgNamespaceURI;
|
|
else
|
|
uri = m_defaultNamespaceURI;
|
|
}
|
|
|
|
// If libxml entity parsing is broken, transfer the currentNodes' namespaceURI to the new node,
|
|
// if we're currently expanding elements which originate from an entity declaration.
|
|
if (hackAroundLibXMLEntityParsingBug() && depthTriggeringEntityExpansion() != -1 && context()->depth > depthTriggeringEntityExpansion() && uri.isNull() && prefix.isNull())
|
|
uri = m_currentNode->namespaceURI();
|
|
|
|
bool isFirstElement = !m_sawFirstElement;
|
|
m_sawFirstElement = true;
|
|
|
|
QualifiedName qName(prefix, localName, uri);
|
|
auto newElement = m_currentNode->document().createElement(qName, true);
|
|
|
|
Vector<Attribute> prefixedAttributes;
|
|
if (!handleNamespaceAttributes(prefixedAttributes, libxmlNamespaces, numNamespaces)) {
|
|
setAttributes(newElement.ptr(), prefixedAttributes, parserContentPolicy());
|
|
stopParsing();
|
|
return;
|
|
}
|
|
|
|
bool success = handleElementAttributes(prefixedAttributes, libxmlAttributes, numAttributes);
|
|
setAttributes(newElement.ptr(), prefixedAttributes, parserContentPolicy());
|
|
if (!success) {
|
|
stopParsing();
|
|
return;
|
|
}
|
|
|
|
newElement->beginParsingChildren();
|
|
|
|
if (isScriptElement(newElement.get()))
|
|
m_scriptStartPosition = textPosition();
|
|
|
|
m_currentNode->parserAppendChild(newElement);
|
|
if (!m_currentNode) // Synchronous DOM events may have removed the current node.
|
|
return;
|
|
|
|
if (is<HTMLTemplateElement>(newElement))
|
|
pushCurrentNode(&downcast<HTMLTemplateElement>(newElement.get()).content());
|
|
else
|
|
pushCurrentNode(newElement.ptr());
|
|
|
|
if (is<HTMLHtmlElement>(newElement))
|
|
downcast<HTMLHtmlElement>(newElement.get()).insertedByParser();
|
|
|
|
if (!m_parsingFragment && isFirstElement && document()->frame())
|
|
document()->frame()->injectUserScripts(UserScriptInjectionTime::DocumentStart);
|
|
}
|
|
|
|
void XMLDocumentParser::endElementNs()
|
|
{
|
|
if (isStopped())
|
|
return;
|
|
|
|
if (m_parserPaused) {
|
|
m_pendingCallbacks->appendEndElementNSCallback();
|
|
return;
|
|
}
|
|
|
|
// JavaScript can detach the parser. Make sure this is not released
|
|
// before the end of this method.
|
|
Ref<XMLDocumentParser> protectedThis(*this);
|
|
|
|
if (!updateLeafTextNode())
|
|
return;
|
|
|
|
RefPtr<ContainerNode> node = m_currentNode;
|
|
node->finishParsingChildren();
|
|
|
|
// Once we reach the depth again where entity expansion started, stop executing the work-around.
|
|
if (hackAroundLibXMLEntityParsingBug() && context()->depth <= depthTriggeringEntityExpansion())
|
|
setDepthTriggeringEntityExpansion(-1);
|
|
|
|
if (!scriptingContentIsAllowed(parserContentPolicy()) && is<Element>(*node) && isScriptElement(downcast<Element>(*node))) {
|
|
popCurrentNode();
|
|
node->remove();
|
|
return;
|
|
}
|
|
|
|
if (!node->isElementNode() || !m_view) {
|
|
popCurrentNode();
|
|
return;
|
|
}
|
|
|
|
auto& element = downcast<Element>(*node);
|
|
|
|
// The element's parent may have already been removed from document.
|
|
// Parsing continues in this case, but scripts aren't executed.
|
|
if (!element.isConnected()) {
|
|
popCurrentNode();
|
|
return;
|
|
}
|
|
|
|
if (!isScriptElement(element)) {
|
|
popCurrentNode();
|
|
return;
|
|
}
|
|
|
|
// Don't load external scripts for standalone documents (for now).
|
|
ASSERT(!m_pendingScript);
|
|
m_requestingScript = true;
|
|
|
|
auto& scriptElement = downcastScriptElement(element);
|
|
if (scriptElement.prepareScript(m_scriptStartPosition, ScriptElement::AllowLegacyTypeInTypeAttribute)) {
|
|
// FIXME: Script execution should be shared between
|
|
// the libxml2 and Qt XMLDocumentParser implementations.
|
|
|
|
if (scriptElement.readyToBeParserExecuted())
|
|
scriptElement.executeClassicScript(ScriptSourceCode(scriptElement.scriptContent(), URL(document()->url()), m_scriptStartPosition, JSC::SourceProviderSourceType::Program, InlineClassicScript::create(scriptElement)));
|
|
else if (scriptElement.willBeParserExecuted() && scriptElement.loadableScript()) {
|
|
m_pendingScript = PendingScript::create(scriptElement, *scriptElement.loadableScript());
|
|
m_pendingScript->setClient(*this);
|
|
|
|
// m_pendingScript will be nullptr if script was already loaded and setClient() executed it.
|
|
if (m_pendingScript)
|
|
pauseParsing();
|
|
}
|
|
|
|
// JavaScript may have detached the parser
|
|
if (isDetached())
|
|
return;
|
|
}
|
|
m_requestingScript = false;
|
|
popCurrentNode();
|
|
}
|
|
|
|
void XMLDocumentParser::characters(const xmlChar* characters, int length)
|
|
{
|
|
if (isStopped())
|
|
return;
|
|
|
|
if (m_parserPaused) {
|
|
m_pendingCallbacks->appendCharactersCallback(characters, length);
|
|
return;
|
|
}
|
|
|
|
if (!m_leafTextNode)
|
|
createLeafTextNode();
|
|
m_bufferedText.append(characters, length);
|
|
}
|
|
|
|
void XMLDocumentParser::error(XMLErrors::ErrorType type, const char* message, va_list args)
|
|
{
|
|
if (isStopped())
|
|
return;
|
|
|
|
va_list preflightArgs;
|
|
va_copy(preflightArgs, args);
|
|
size_t stringLength = vsnprintf(nullptr, 0, message, preflightArgs);
|
|
va_end(preflightArgs);
|
|
|
|
Vector<char, 1024> buffer(stringLength + 1);
|
|
vsnprintf(buffer.data(), stringLength + 1, message, args);
|
|
|
|
TextPosition position = textPosition();
|
|
if (m_parserPaused)
|
|
m_pendingCallbacks->appendErrorCallback(type, reinterpret_cast<const xmlChar*>(buffer.data()), position.m_line, position.m_column);
|
|
else
|
|
handleError(type, buffer.data(), textPosition());
|
|
}
|
|
|
|
void XMLDocumentParser::processingInstruction(const xmlChar* target, const xmlChar* data)
|
|
{
|
|
if (isStopped())
|
|
return;
|
|
|
|
if (m_parserPaused) {
|
|
m_pendingCallbacks->appendProcessingInstructionCallback(target, data);
|
|
return;
|
|
}
|
|
|
|
if (!updateLeafTextNode())
|
|
return;
|
|
|
|
auto result = m_currentNode->document().createProcessingInstruction(toString(target), toString(data));
|
|
if (result.hasException())
|
|
return;
|
|
auto pi = result.releaseReturnValue();
|
|
|
|
pi->setCreatedByParser(true);
|
|
|
|
m_currentNode->parserAppendChild(pi);
|
|
|
|
pi->finishParsingChildren();
|
|
|
|
if (pi->isCSS())
|
|
m_sawCSS = true;
|
|
|
|
#if ENABLE(XSLT)
|
|
m_sawXSLTransform = !m_sawFirstElement && pi->isXSL();
|
|
if (m_sawXSLTransform && !document()->transformSourceDocument())
|
|
stopParsing();
|
|
#endif
|
|
}
|
|
|
|
void XMLDocumentParser::cdataBlock(const xmlChar* s, int len)
|
|
{
|
|
if (isStopped())
|
|
return;
|
|
|
|
if (m_parserPaused) {
|
|
m_pendingCallbacks->appendCDATABlockCallback(s, len);
|
|
return;
|
|
}
|
|
|
|
if (!updateLeafTextNode())
|
|
return;
|
|
|
|
m_currentNode->parserAppendChild(CDATASection::create(m_currentNode->document(), toString(s, len)));
|
|
}
|
|
|
|
void XMLDocumentParser::comment(const xmlChar* s)
|
|
{
|
|
if (isStopped())
|
|
return;
|
|
|
|
if (m_parserPaused) {
|
|
m_pendingCallbacks->appendCommentCallback(s);
|
|
return;
|
|
}
|
|
|
|
if (!updateLeafTextNode())
|
|
return;
|
|
|
|
m_currentNode->parserAppendChild(Comment::create(m_currentNode->document(), toString(s)));
|
|
}
|
|
|
|
enum StandaloneInfo {
|
|
StandaloneUnspecified = -2,
|
|
NoXMlDeclaration,
|
|
StandaloneNo,
|
|
StandaloneYes
|
|
};
|
|
|
|
void XMLDocumentParser::startDocument(const xmlChar* version, const xmlChar* encoding, int standalone)
|
|
{
|
|
StandaloneInfo standaloneInfo = (StandaloneInfo)standalone;
|
|
if (standaloneInfo == NoXMlDeclaration) {
|
|
document()->setHasXMLDeclaration(false);
|
|
return;
|
|
}
|
|
|
|
if (version)
|
|
document()->setXMLVersion(toString(version));
|
|
if (standalone != StandaloneUnspecified)
|
|
document()->setXMLStandalone(standaloneInfo == StandaloneYes);
|
|
if (encoding)
|
|
document()->setXMLEncoding(toString(encoding));
|
|
document()->setHasXMLDeclaration(true);
|
|
}
|
|
|
|
void XMLDocumentParser::endDocument()
|
|
{
|
|
updateLeafTextNode();
|
|
}
|
|
|
|
void XMLDocumentParser::internalSubset(const xmlChar* name, const xmlChar* externalID, const xmlChar* systemID)
|
|
{
|
|
if (isStopped())
|
|
return;
|
|
|
|
if (m_parserPaused) {
|
|
m_pendingCallbacks->appendInternalSubsetCallback(name, externalID, systemID);
|
|
return;
|
|
}
|
|
|
|
if (document())
|
|
document()->parserAppendChild(DocumentType::create(*document(), toString(name), toString(externalID), toString(systemID)));
|
|
}
|
|
|
|
static inline XMLDocumentParser* getParser(void* closure)
|
|
{
|
|
xmlParserCtxtPtr ctxt = static_cast<xmlParserCtxtPtr>(closure);
|
|
return static_cast<XMLDocumentParser*>(ctxt->_private);
|
|
}
|
|
|
|
// This is a hack around http://bugzilla.gnome.org/show_bug.cgi?id=159219
|
|
// Otherwise libxml seems to call all the SAX callbacks twice for any replaced entity.
|
|
static inline bool hackAroundLibXMLEntityBug(void* closure)
|
|
{
|
|
#if LIBXML_VERSION >= 20627
|
|
// This bug has been fixed in libxml 2.6.27.
|
|
UNUSED_PARAM(closure);
|
|
return false;
|
|
#else
|
|
return static_cast<xmlParserCtxtPtr>(closure)->node;
|
|
#endif
|
|
}
|
|
|
|
static void startElementNsHandler(void* closure, const xmlChar* localname, const xmlChar* prefix, const xmlChar* uri, int numNamespaces, const xmlChar** namespaces, int numAttributes, int numDefaulted, const xmlChar** libxmlAttributes)
|
|
{
|
|
if (hackAroundLibXMLEntityBug(closure))
|
|
return;
|
|
|
|
getParser(closure)->startElementNs(localname, prefix, uri, numNamespaces, namespaces, numAttributes, numDefaulted, libxmlAttributes);
|
|
}
|
|
|
|
static void endElementNsHandler(void* closure, const xmlChar*, const xmlChar*, const xmlChar*)
|
|
{
|
|
if (hackAroundLibXMLEntityBug(closure))
|
|
return;
|
|
|
|
getParser(closure)->endElementNs();
|
|
}
|
|
|
|
static void charactersHandler(void* closure, const xmlChar* s, int len)
|
|
{
|
|
if (hackAroundLibXMLEntityBug(closure))
|
|
return;
|
|
|
|
getParser(closure)->characters(s, len);
|
|
}
|
|
|
|
static void processingInstructionHandler(void* closure, const xmlChar* target, const xmlChar* data)
|
|
{
|
|
if (hackAroundLibXMLEntityBug(closure))
|
|
return;
|
|
|
|
getParser(closure)->processingInstruction(target, data);
|
|
}
|
|
|
|
static void cdataBlockHandler(void* closure, const xmlChar* s, int len)
|
|
{
|
|
if (hackAroundLibXMLEntityBug(closure))
|
|
return;
|
|
|
|
getParser(closure)->cdataBlock(s, len);
|
|
}
|
|
|
|
static void commentHandler(void* closure, const xmlChar* comment)
|
|
{
|
|
if (hackAroundLibXMLEntityBug(closure))
|
|
return;
|
|
|
|
getParser(closure)->comment(comment);
|
|
}
|
|
|
|
WTF_ATTRIBUTE_PRINTF(2, 3)
|
|
static void warningHandler(void* closure, const char* message, ...)
|
|
{
|
|
va_list args;
|
|
va_start(args, message);
|
|
getParser(closure)->error(XMLErrors::warning, message, args);
|
|
va_end(args);
|
|
}
|
|
|
|
WTF_ATTRIBUTE_PRINTF(2, 3)
|
|
static void fatalErrorHandler(void* closure, const char* message, ...)
|
|
{
|
|
va_list args;
|
|
va_start(args, message);
|
|
getParser(closure)->error(XMLErrors::fatal, message, args);
|
|
va_end(args);
|
|
}
|
|
|
|
WTF_ATTRIBUTE_PRINTF(2, 3)
|
|
static void normalErrorHandler(void* closure, const char* message, ...)
|
|
{
|
|
va_list args;
|
|
va_start(args, message);
|
|
getParser(closure)->error(XMLErrors::nonFatal, message, args);
|
|
va_end(args);
|
|
}
|
|
|
|
// Using a static entity and marking it XML_INTERNAL_PREDEFINED_ENTITY is
|
|
// a hack to avoid malloc/free. Using a global variable like this could cause trouble
|
|
// if libxml implementation details were to change
|
|
static xmlChar sharedXHTMLEntityResult[9] = {0, 0, 0, 0, 0, 0, 0, 0, 0};
|
|
|
|
static xmlEntityPtr sharedXHTMLEntity()
|
|
{
|
|
static xmlEntity entity;
|
|
if (!entity.type) {
|
|
entity.type = XML_ENTITY_DECL;
|
|
entity.orig = sharedXHTMLEntityResult;
|
|
entity.content = sharedXHTMLEntityResult;
|
|
entity.etype = XML_INTERNAL_PREDEFINED_ENTITY;
|
|
}
|
|
return &entity;
|
|
}
|
|
|
|
static size_t convertUTF16EntityToUTF8(const UChar* utf16Entity, size_t numberOfCodeUnits, char* target, size_t targetSize)
|
|
{
|
|
const char* originalTarget = target;
|
|
auto conversionResult = WTF::Unicode::convertUTF16ToUTF8(&utf16Entity, utf16Entity + numberOfCodeUnits, &target, target + targetSize);
|
|
if (conversionResult != WTF::Unicode::ConversionOK)
|
|
return 0;
|
|
|
|
// Even though we must pass the length, libxml expects the entity string to be null terminated.
|
|
ASSERT(target >= originalTarget + 1);
|
|
*target = '\0';
|
|
return target - originalTarget;
|
|
}
|
|
|
|
static xmlEntityPtr getXHTMLEntity(const xmlChar* name)
|
|
{
|
|
UChar utf16DecodedEntity[4];
|
|
size_t numberOfCodeUnits = decodeNamedEntityToUCharArray(reinterpret_cast<const char*>(name), utf16DecodedEntity);
|
|
if (!numberOfCodeUnits)
|
|
return 0;
|
|
|
|
ASSERT(numberOfCodeUnits <= 4);
|
|
size_t entityLengthInUTF8 = convertUTF16EntityToUTF8(utf16DecodedEntity, numberOfCodeUnits,
|
|
reinterpret_cast<char*>(sharedXHTMLEntityResult), WTF_ARRAY_LENGTH(sharedXHTMLEntityResult));
|
|
if (!entityLengthInUTF8)
|
|
return 0;
|
|
|
|
xmlEntityPtr entity = sharedXHTMLEntity();
|
|
entity->length = entityLengthInUTF8;
|
|
entity->name = name;
|
|
return entity;
|
|
}
|
|
|
|
static void entityDeclarationHandler(void* closure, const xmlChar* name, int type, const xmlChar* publicId, const xmlChar* systemId, xmlChar* content)
|
|
{
|
|
// Prevent the next call to getEntityHandler() to record the entity expansion depth.
|
|
// We're parsing the entity declaration, so there's no need to record anything.
|
|
// We only need to record the depth, if we're actually expanding the entity, when it's referenced.
|
|
if (hackAroundLibXMLEntityParsingBug())
|
|
getParser(closure)->setIsParsingEntityDeclaration(true);
|
|
xmlSAX2EntityDecl(closure, name, type, publicId, systemId, content);
|
|
}
|
|
|
|
static xmlEntityPtr getEntityHandler(void* closure, const xmlChar* name)
|
|
{
|
|
xmlParserCtxtPtr ctxt = static_cast<xmlParserCtxtPtr>(closure);
|
|
|
|
XMLDocumentParser* parser = getParser(closure);
|
|
if (hackAroundLibXMLEntityParsingBug()) {
|
|
if (parser->isParsingEntityDeclaration()) {
|
|
// We're parsing the entity declarations (not an entity reference), no need to do anything special.
|
|
parser->setIsParsingEntityDeclaration(false);
|
|
ASSERT(parser->depthTriggeringEntityExpansion() == -1);
|
|
} else {
|
|
// The entity will be used and eventually expanded. Record the current parser depth
|
|
// so the next call to startElementNs() knows that the new element originates from
|
|
// an entity declaration.
|
|
parser->setDepthTriggeringEntityExpansion(ctxt->depth);
|
|
}
|
|
}
|
|
|
|
xmlEntityPtr ent = xmlGetPredefinedEntity(name);
|
|
if (ent) {
|
|
ent->etype = XML_INTERNAL_PREDEFINED_ENTITY;
|
|
return ent;
|
|
}
|
|
|
|
ent = xmlGetDocEntity(ctxt->myDoc, name);
|
|
if (!ent && parser->isXHTMLDocument()) {
|
|
ent = getXHTMLEntity(name);
|
|
if (ent)
|
|
ent->etype = XML_INTERNAL_GENERAL_ENTITY;
|
|
}
|
|
|
|
return ent;
|
|
}
|
|
|
|
static void startDocumentHandler(void* closure)
|
|
{
|
|
xmlParserCtxt* ctxt = static_cast<xmlParserCtxt*>(closure);
|
|
switchToUTF16(ctxt);
|
|
getParser(closure)->startDocument(ctxt->version, ctxt->encoding, ctxt->standalone);
|
|
xmlSAX2StartDocument(closure);
|
|
}
|
|
|
|
static void endDocumentHandler(void* closure)
|
|
{
|
|
getParser(closure)->endDocument();
|
|
xmlSAX2EndDocument(closure);
|
|
}
|
|
|
|
static void internalSubsetHandler(void* closure, const xmlChar* name, const xmlChar* externalID, const xmlChar* systemID)
|
|
{
|
|
getParser(closure)->internalSubset(name, externalID, systemID);
|
|
xmlSAX2InternalSubset(closure, name, externalID, systemID);
|
|
}
|
|
|
|
static void externalSubsetHandler(void* closure, const xmlChar*, const xmlChar* externalId, const xmlChar*)
|
|
{
|
|
String extId = toString(externalId);
|
|
if ((extId == "-//W3C//DTD XHTML 1.0 Transitional//EN")
|
|
|| (extId == "-//W3C//DTD XHTML 1.1//EN")
|
|
|| (extId == "-//W3C//DTD XHTML 1.0 Strict//EN")
|
|
|| (extId == "-//W3C//DTD XHTML 1.0 Frameset//EN")
|
|
|| (extId == "-//W3C//DTD XHTML Basic 1.0//EN")
|
|
|| (extId == "-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN")
|
|
|| (extId == "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN")
|
|
|| (extId == "-//W3C//DTD MathML 2.0//EN")
|
|
|| (extId == "-//WAPFORUM//DTD XHTML Mobile 1.0//EN")
|
|
|| (extId == "-//WAPFORUM//DTD XHTML Mobile 1.1//EN")
|
|
|| (extId == "-//WAPFORUM//DTD XHTML Mobile 1.2//EN"))
|
|
getParser(closure)->setIsXHTMLDocument(true); // controls if we replace entities or not.
|
|
}
|
|
|
|
static void ignorableWhitespaceHandler(void*, const xmlChar*, int)
|
|
{
|
|
// nothing to do, but we need this to work around a crasher
|
|
// http://bugzilla.gnome.org/show_bug.cgi?id=172255
|
|
// http://bugs.webkit.org/show_bug.cgi?id=5792
|
|
}
|
|
|
|
void XMLDocumentParser::initializeParserContext(const CString& chunk)
|
|
{
|
|
xmlSAXHandler sax;
|
|
memset(&sax, 0, sizeof(sax));
|
|
|
|
sax.error = normalErrorHandler;
|
|
sax.fatalError = fatalErrorHandler;
|
|
sax.characters = charactersHandler;
|
|
sax.processingInstruction = processingInstructionHandler;
|
|
sax.cdataBlock = cdataBlockHandler;
|
|
sax.comment = commentHandler;
|
|
sax.warning = warningHandler;
|
|
sax.startElementNs = startElementNsHandler;
|
|
sax.endElementNs = endElementNsHandler;
|
|
sax.getEntity = getEntityHandler;
|
|
sax.startDocument = startDocumentHandler;
|
|
sax.endDocument = endDocumentHandler;
|
|
sax.internalSubset = internalSubsetHandler;
|
|
sax.externalSubset = externalSubsetHandler;
|
|
sax.ignorableWhitespace = ignorableWhitespaceHandler;
|
|
sax.entityDecl = entityDeclarationHandler;
|
|
sax.initialized = XML_SAX2_MAGIC;
|
|
DocumentParser::startParsing();
|
|
m_sawError = false;
|
|
m_sawCSS = false;
|
|
m_sawXSLTransform = false;
|
|
m_sawFirstElement = false;
|
|
|
|
XMLDocumentParserScope scope(&document()->cachedResourceLoader());
|
|
if (m_parsingFragment)
|
|
m_context = XMLParserContext::createMemoryParser(&sax, this, chunk);
|
|
else {
|
|
ASSERT(!chunk.data());
|
|
m_context = XMLParserContext::createStringParser(&sax, this);
|
|
}
|
|
}
|
|
|
|
void XMLDocumentParser::doEnd()
|
|
{
|
|
if (!isStopped()) {
|
|
if (m_context) {
|
|
// Tell libxml we're done.
|
|
{
|
|
XMLDocumentParserScope scope(&document()->cachedResourceLoader());
|
|
xmlParseChunk(context(), 0, 0, 1);
|
|
}
|
|
|
|
m_context = nullptr;
|
|
}
|
|
}
|
|
|
|
#if ENABLE(XSLT)
|
|
bool xmlViewerMode = !m_sawError && !m_sawCSS && !m_sawXSLTransform && shouldRenderInXMLTreeViewerMode(*document());
|
|
if (xmlViewerMode) {
|
|
XMLTreeViewer xmlTreeViewer(*document());
|
|
xmlTreeViewer.transformDocumentToTreeView();
|
|
} else if (m_sawXSLTransform) {
|
|
xmlDocPtr doc = xmlDocPtrForString(document()->cachedResourceLoader(), m_originalSourceForTransform.toString(), document()->url().string());
|
|
document()->setTransformSource(makeUnique<TransformSource>(doc));
|
|
|
|
document()->setParsing(false); // Make the document think it's done, so it will apply XSL stylesheets.
|
|
document()->applyPendingXSLTransformsNowIfScheduled();
|
|
|
|
// styleResolverChanged() call can detach the parser and null out its document.
|
|
// In that case, we just bail out.
|
|
if (isDetached())
|
|
return;
|
|
|
|
document()->setParsing(true);
|
|
DocumentParser::stopParsing();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#if ENABLE(XSLT)
|
|
static inline const char* nativeEndianUTF16Encoding()
|
|
{
|
|
const unsigned char BOMHighByte = *reinterpret_cast<const unsigned char*>(&byteOrderMark);
|
|
return BOMHighByte == 0xFF ? "UTF-16LE" : "UTF-16BE";
|
|
}
|
|
|
|
xmlDocPtr xmlDocPtrForString(CachedResourceLoader& cachedResourceLoader, const String& source, const String& url)
|
|
{
|
|
if (source.isEmpty())
|
|
return nullptr;
|
|
|
|
// Parse in a single chunk into an xmlDocPtr
|
|
// FIXME: Hook up error handlers so that a failure to parse the main document results in
|
|
// good error messages.
|
|
|
|
const bool is8Bit = source.is8Bit();
|
|
const char* characters = is8Bit ? reinterpret_cast<const char*>(source.characters8()) : reinterpret_cast<const char*>(source.characters16());
|
|
size_t sizeInBytes = source.length() * (is8Bit ? sizeof(LChar) : sizeof(UChar));
|
|
const char* encoding = is8Bit ? "iso-8859-1" : nativeEndianUTF16Encoding();
|
|
|
|
XMLDocumentParserScope scope(&cachedResourceLoader, errorFunc);
|
|
return xmlReadMemory(characters, sizeInBytes, url.latin1().data(), encoding, XSLT_PARSE_OPTIONS);
|
|
}
|
|
#endif
|
|
|
|
TextPosition XMLDocumentParser::textPosition() const
|
|
{
|
|
xmlParserCtxtPtr context = this->context();
|
|
if (!context)
|
|
return TextPosition();
|
|
return TextPosition(OrdinalNumber::fromOneBasedInt(context->input->line),
|
|
OrdinalNumber::fromOneBasedInt(context->input->col));
|
|
}
|
|
|
|
bool XMLDocumentParser::shouldAssociateConsoleMessagesWithTextPosition() const
|
|
{
|
|
return !m_parserPaused && !m_requestingScript;
|
|
}
|
|
|
|
void XMLDocumentParser::stopParsing()
|
|
{
|
|
if (m_sawError)
|
|
insertErrorMessageBlock();
|
|
|
|
DocumentParser::stopParsing();
|
|
if (context())
|
|
xmlStopParser(context());
|
|
}
|
|
|
|
void XMLDocumentParser::resumeParsing()
|
|
{
|
|
ASSERT(!isDetached());
|
|
ASSERT(m_parserPaused);
|
|
|
|
m_parserPaused = false;
|
|
|
|
// First, execute any pending callbacks
|
|
while (!m_pendingCallbacks->isEmpty()) {
|
|
m_pendingCallbacks->callAndRemoveFirstCallback(this);
|
|
|
|
// A callback paused the parser
|
|
if (m_parserPaused)
|
|
return;
|
|
}
|
|
|
|
// There is normally only one string left, so toString() shouldn't copy.
|
|
// In any case, the XML parser runs on the main thread and it's OK if
|
|
// the passed string has more than one reference.
|
|
auto rest = m_pendingSrc.toString();
|
|
m_pendingSrc.clear();
|
|
append(rest.impl());
|
|
|
|
// Finally, if finish() has been called and write() didn't result
|
|
// in any further callbacks being queued, call end()
|
|
if (m_finishCalled && m_pendingCallbacks->isEmpty())
|
|
end();
|
|
}
|
|
|
|
bool XMLDocumentParser::appendFragmentSource(const String& chunk)
|
|
{
|
|
ASSERT(!m_context);
|
|
ASSERT(m_parsingFragment);
|
|
|
|
CString chunkAsUtf8 = chunk.utf8();
|
|
|
|
// libxml2 takes an int for a length, and therefore can't handle XML chunks larger than 2 GiB.
|
|
if (chunkAsUtf8.length() > INT_MAX)
|
|
return false;
|
|
|
|
initializeParserContext(chunkAsUtf8);
|
|
xmlParseContent(context());
|
|
endDocument(); // Close any open text nodes.
|
|
|
|
// FIXME: If this code is actually needed, it should probably move to finish()
|
|
// XMLDocumentParserQt has a similar check (m_stream.error() == QXmlStreamReader::PrematureEndOfDocumentError) in doEnd().
|
|
// Check if all the chunk has been processed.
|
|
long bytesProcessed = xmlByteConsumed(context());
|
|
if (bytesProcessed == -1 || ((unsigned long)bytesProcessed) != chunkAsUtf8.length()) {
|
|
// FIXME: I don't believe we can hit this case without also having seen an error or a null byte.
|
|
// If we hit this ASSERT, we've found a test case which demonstrates the need for this code.
|
|
ASSERT(m_sawError || (bytesProcessed >= 0 && !chunkAsUtf8.data()[bytesProcessed]));
|
|
return false;
|
|
}
|
|
|
|
// No error if the chunk is well formed or it is not but we have no error.
|
|
return context()->wellFormed || !xmlCtxtGetLastError(context());
|
|
}
|
|
|
|
// --------------------------------
|
|
|
|
using AttributeParseState = std::optional<HashMap<String, String>>;
|
|
|
|
static void attributesStartElementNsHandler(void* closure, const xmlChar* xmlLocalName, const xmlChar* /*xmlPrefix*/, const xmlChar* /*xmlURI*/, int /*numNamespaces*/, const xmlChar** /*namespaces*/, int numAttributes, int /*numDefaulted*/, const xmlChar** libxmlAttributes)
|
|
{
|
|
if (strcmp(reinterpret_cast<const char*>(xmlLocalName), "attrs") != 0)
|
|
return;
|
|
|
|
auto& state = *static_cast<AttributeParseState*>(static_cast<xmlParserCtxtPtr>(closure)->_private);
|
|
|
|
state = HashMap<String, String> { };
|
|
|
|
xmlSAX2Attributes* attributes = reinterpret_cast<xmlSAX2Attributes*>(libxmlAttributes);
|
|
for (int i = 0; i < numAttributes; i++) {
|
|
String attrLocalName = toString(attributes[i].localname);
|
|
int valueLength = (int) (attributes[i].end - attributes[i].value);
|
|
String attrValue = toString(attributes[i].value, valueLength);
|
|
String attrPrefix = toString(attributes[i].prefix);
|
|
String attrQName = attrPrefix.isEmpty() ? attrLocalName : attrPrefix + ":" + attrLocalName;
|
|
|
|
state->set(attrQName, attrValue);
|
|
}
|
|
}
|
|
|
|
std::optional<HashMap<String, String>> parseAttributes(const String& string)
|
|
{
|
|
String parseString = "<?xml version=\"1.0\"?><attrs " + string + " />";
|
|
|
|
AttributeParseState attributes;
|
|
|
|
xmlSAXHandler sax;
|
|
memset(&sax, 0, sizeof(sax));
|
|
sax.startElementNs = attributesStartElementNsHandler;
|
|
sax.initialized = XML_SAX2_MAGIC;
|
|
|
|
auto parser = XMLParserContext::createStringParser(&sax, &attributes);
|
|
|
|
// FIXME: Can we parse 8-bit strings directly as Latin-1 instead of upconverting to UTF-16?
|
|
xmlParseChunk(parser->context(), reinterpret_cast<const char*>(StringView(parseString).upconvertedCharacters().get()), parseString.length() * sizeof(UChar), 1);
|
|
|
|
return attributes;
|
|
}
|
|
|
|
}
|