| /* |
| * Copyright (C) 2000 Peter Kelly (pmk@post.com) |
| * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved. |
| * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org) |
| * Copyright (C) 2007 Samuel Weinig (sam@webkit.org) |
| * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies) |
| * Copyright (C) 2008 Holger Hans Peter Freyther |
| * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| #include "core/xml/parser/XMLDocumentParser.h" |
| |
| #include "FetchInitiatorTypeNames.h" |
| #include "HTMLNames.h" |
| #include "XMLNSNames.h" |
| #include "bindings/v8/ExceptionState.h" |
| #include "bindings/v8/ExceptionStatePlaceholder.h" |
| #include "bindings/v8/ScriptController.h" |
| #include "bindings/v8/ScriptSourceCode.h" |
| #include "core/dom/CDATASection.h" |
| #include "core/dom/Comment.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/DocumentFragment.h" |
| #include "core/dom/DocumentType.h" |
| #include "core/dom/ProcessingInstruction.h" |
| #include "core/dom/ScriptLoader.h" |
| #include "core/dom/TransformSource.h" |
| #include "core/fetch/ResourceFetcher.h" |
| #include "core/fetch/ScriptResource.h" |
| #include "core/fetch/TextResourceDecoder.h" |
| #include "core/html/HTMLHtmlElement.h" |
| #include "core/html/HTMLTemplateElement.h" |
| #include "core/html/parser/HTMLEntityParser.h" |
| #include "core/loader/FrameLoader.h" |
| #include "core/loader/ImageLoader.h" |
| #include "core/page/Frame.h" |
| #include "core/page/UseCounter.h" |
| #include "core/platform/SharedBuffer.h" |
| #include "core/platform/network/ResourceError.h" |
| #include "core/platform/network/ResourceRequest.h" |
| #include "core/platform/network/ResourceResponse.h" |
| #include "core/xml/XMLErrors.h" |
| #include "core/xml/XMLTreeViewer.h" |
| #include "core/xml/parser/XMLDocumentParserScope.h" |
| #include "core/xml/parser/XMLParserInput.h" |
| #include "weborigin/SecurityOrigin.h" |
| #include "wtf/StringExtras.h" |
| #include "wtf/TemporaryChange.h" |
| #include "wtf/Threading.h" |
| #include "wtf/UnusedParam.h" |
| #include "wtf/Vector.h" |
| #include "wtf/text/CString.h" |
| #include "wtf/unicode/UTF8.h" |
| #include <libxml/catalog.h> |
| #include <libxml/parser.h> |
| #include <libxml/parserInternals.h> |
| #include <libxslt/xslt.h> |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| // FIXME: HTMLConstructionSite has a limit of 512, should these match? |
| static const unsigned maxXMLTreeDepth = 5000; |
| |
| static inline String toString(const xmlChar* string, size_t length) |
| { |
| return String::fromUTF8(reinterpret_cast<const char*>(string), length); |
| } |
| |
| static inline String toString(const xmlChar* string) |
| { |
| return String::fromUTF8(reinterpret_cast<const char*>(string)); |
| } |
| |
| static inline AtomicString toAtomicString(const xmlChar* string, size_t length) |
| { |
| return AtomicString::fromUTF8(reinterpret_cast<const char*>(string), length); |
| } |
| |
| static inline AtomicString toAtomicString(const xmlChar* string) |
| { |
| return AtomicString::fromUTF8(reinterpret_cast<const char*>(string)); |
| } |
| |
| static inline bool hasNoStyleInformation(Document* document) |
| { |
| if (document->sawElementsInKnownNamespaces() || document->transformSourceDocument()) |
| return false; |
| |
| if (!document->frame() || !document->frame()->page()) |
| return false; |
| |
| if (document->frame()->tree()->parent()) |
| return false; // This document is not in a top frame |
| |
| return true; |
| } |
| |
| class PendingStartElementNSCallback FINAL : public XMLDocumentParser::PendingCallback { |
| public: |
| PendingStartElementNSCallback(const AtomicString& localName, const AtomicString& prefix, const AtomicString& uri, |
| int namespaceCount, const xmlChar** namespaces, int attributeCount, int defaultedCount, const xmlChar** attributes) |
| : m_localName(localName) |
| , m_prefix(prefix) |
| , m_uri(uri) |
| , m_namespaceCount(namespaceCount) |
| , m_attributeCount(attributeCount) |
| , m_defaultedCount(defaultedCount) |
| { |
| m_namespaces = static_cast<xmlChar**>(xmlMalloc(sizeof(xmlChar*) * namespaceCount * 2)); |
| for (int i = 0; i < namespaceCount * 2 ; i++) |
| m_namespaces[i] = xmlStrdup(namespaces[i]); |
| m_attributes = static_cast<xmlChar**>(xmlMalloc(sizeof(xmlChar*) * attributeCount * 5)); |
| for (int i = 0; i < attributeCount; i++) { |
| // Each attribute has 5 elements in the array: |
| // name, prefix, uri, value and an end pointer. |
| for (int j = 0; j < 3; j++) |
| m_attributes[i * 5 + j] = xmlStrdup(attributes[i * 5 + j]); |
| int length = attributes[i * 5 + 4] - attributes[i * 5 + 3]; |
| m_attributes[i * 5 + 3] = xmlStrndup(attributes[i * 5 + 3], length); |
| m_attributes[i * 5 + 4] = m_attributes[i * 5 + 3] + length; |
| } |
| } |
| |
| virtual ~PendingStartElementNSCallback() |
| { |
| for (int i = 0; i < m_namespaceCount * 2; i++) |
| xmlFree(m_namespaces[i]); |
| xmlFree(m_namespaces); |
| for (int i = 0; i < m_attributeCount; i++) |
| for (int j = 0; j < 4; j++) |
| xmlFree(m_attributes[i * 5 + j]); |
| xmlFree(m_attributes); |
| } |
| |
| virtual void call(XMLDocumentParser* parser) OVERRIDE |
| { |
| parser->startElementNs(m_localName, m_prefix, m_uri, |
| m_namespaceCount, const_cast<const xmlChar**>(m_namespaces), |
| m_attributeCount, m_defaultedCount, const_cast<const xmlChar**>(m_attributes)); |
| } |
| |
| private: |
| AtomicString m_localName; |
| AtomicString m_prefix; |
| AtomicString m_uri; |
| int m_namespaceCount; |
| xmlChar** m_namespaces; |
| int m_attributeCount; |
| int m_defaultedCount; |
| xmlChar** m_attributes; |
| }; |
| |
| class PendingEndElementNSCallback FINAL : public XMLDocumentParser::PendingCallback { |
| public: |
| virtual void call(XMLDocumentParser* parser) OVERRIDE |
| { |
| parser->endElementNs(); |
| } |
| }; |
| |
| class PendingCharactersCallback FINAL : public XMLDocumentParser::PendingCallback { |
| public: |
| PendingCharactersCallback(const xmlChar* chars, int length) |
| : m_chars(xmlStrndup(chars, length)) |
| , m_length(length) |
| { |
| } |
| |
| virtual ~PendingCharactersCallback() |
| { |
| xmlFree(m_chars); |
| } |
| |
| virtual void call(XMLDocumentParser* parser) OVERRIDE |
| { |
| parser->characters(m_chars, m_length); |
| } |
| |
| private: |
| xmlChar* m_chars; |
| int m_length; |
| }; |
| |
| class PendingProcessingInstructionCallback FINAL : public XMLDocumentParser::PendingCallback { |
| public: |
| PendingProcessingInstructionCallback(const String& target, const String& data) |
| : m_target(target) |
| , m_data(data) |
| { |
| } |
| |
| virtual void call(XMLDocumentParser* parser) OVERRIDE |
| { |
| parser->processingInstruction(m_target, m_data); |
| } |
| |
| private: |
| String m_target; |
| String m_data; |
| }; |
| |
| class PendingCDATABlockCallback FINAL : public XMLDocumentParser::PendingCallback { |
| public: |
| explicit PendingCDATABlockCallback(const String& text) : m_text(text) { } |
| |
| virtual void call(XMLDocumentParser* parser) OVERRIDE |
| { |
| parser->cdataBlock(m_text); |
| } |
| |
| private: |
| String m_text; |
| }; |
| |
| class PendingCommentCallback FINAL : public XMLDocumentParser::PendingCallback { |
| public: |
| explicit PendingCommentCallback(const String& text) : m_text(text) { } |
| |
| virtual void call(XMLDocumentParser* parser) OVERRIDE |
| { |
| parser->comment(m_text); |
| } |
| |
| private: |
| String m_text; |
| }; |
| |
| class PendingInternalSubsetCallback FINAL : public XMLDocumentParser::PendingCallback { |
| public: |
| PendingInternalSubsetCallback(const String& name, const String& externalID, const String& systemID) |
| : m_name(name) |
| , m_externalID(externalID) |
| , m_systemID(systemID) |
| { |
| } |
| |
| virtual void call(XMLDocumentParser* parser) OVERRIDE |
| { |
| parser->internalSubset(m_name, m_externalID, m_systemID); |
| } |
| |
| private: |
| String m_name; |
| String m_externalID; |
| String m_systemID; |
| }; |
| |
| class PendingErrorCallback FINAL : public XMLDocumentParser::PendingCallback { |
| public: |
| PendingErrorCallback(XMLErrors::ErrorType type, const xmlChar* message, OrdinalNumber lineNumber, OrdinalNumber columnNumber) |
| : m_type(type) |
| , m_message(xmlStrdup(message)) |
| , m_lineNumber(lineNumber) |
| , m_columnNumber(columnNumber) |
| { |
| } |
| |
| virtual ~PendingErrorCallback() |
| { |
| xmlFree(m_message); |
| } |
| |
| virtual void call(XMLDocumentParser* parser) OVERRIDE |
| { |
| parser->handleError(m_type, reinterpret_cast<char*>(m_message), TextPosition(m_lineNumber, m_columnNumber)); |
| } |
| |
| private: |
| XMLErrors::ErrorType m_type; |
| xmlChar* m_message; |
| OrdinalNumber m_lineNumber; |
| OrdinalNumber m_columnNumber; |
| }; |
| |
| void XMLDocumentParser::pushCurrentNode(ContainerNode* n) |
| { |
| ASSERT(n); |
| ASSERT(m_currentNode); |
| if (n != document()) |
| n->ref(); |
| m_currentNodeStack.append(m_currentNode); |
| m_currentNode = n; |
| if (m_currentNodeStack.size() > maxXMLTreeDepth) |
| handleError(XMLErrors::fatal, "Excessive node nesting.", textPosition()); |
| } |
| |
| void XMLDocumentParser::popCurrentNode() |
| { |
| if (!m_currentNode) |
| return; |
| ASSERT(m_currentNodeStack.size()); |
| |
| if (m_currentNode != document()) |
| m_currentNode->deref(); |
| |
| m_currentNode = m_currentNodeStack.last(); |
| m_currentNodeStack.removeLast(); |
| } |
| |
| void XMLDocumentParser::clearCurrentNodeStack() |
| { |
| if (m_currentNode && m_currentNode != document()) |
| m_currentNode->deref(); |
| m_currentNode = 0; |
| m_leafTextNode = 0; |
| |
| if (m_currentNodeStack.size()) { // Aborted parsing. |
| for (size_t i = m_currentNodeStack.size() - 1; i != 0; --i) |
| m_currentNodeStack[i]->deref(); |
| if (m_currentNodeStack[0] && m_currentNodeStack[0] != document()) |
| m_currentNodeStack[0]->deref(); |
| m_currentNodeStack.clear(); |
| } |
| } |
| |
| void XMLDocumentParser::insert(const SegmentedString&) |
| { |
| ASSERT_NOT_REACHED(); |
| } |
| |
| void XMLDocumentParser::append(PassRefPtr<StringImpl> inputSource) |
| { |
| SegmentedString source(inputSource); |
| if (m_sawXSLTransform || !m_sawFirstElement) |
| m_originalSourceForTransform.append(source); |
| |
| if (isStopped() || m_sawXSLTransform) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingSrc.append(source); |
| return; |
| } |
| |
| // JavaScript can detach the parser. Make sure this is not released |
| // before the end of this method. |
| RefPtr<XMLDocumentParser> protect(this); |
| |
| doWrite(source.toString()); |
| |
| if (isStopped()) |
| return; |
| |
| if (document()->frame() && document()->frame()->script()->canExecuteScripts(NotAboutToExecuteScript)) |
| ImageLoader::dispatchPendingBeforeLoadEvents(); |
| } |
| |
| void XMLDocumentParser::handleError(XMLErrors::ErrorType type, const char* formattedMessage, TextPosition position) |
| { |
| m_xmlErrors.handleError(type, formattedMessage, position); |
| if (type != XMLErrors::warning) |
| m_sawError = true; |
| if (type == XMLErrors::fatal) |
| stopParsing(); |
| } |
| |
| void XMLDocumentParser::enterText() |
| { |
| ASSERT(m_bufferedText.size() == 0); |
| ASSERT(!m_leafTextNode); |
| m_leafTextNode = Text::create(m_currentNode->document(), ""); |
| m_currentNode->parserAppendChild(m_leafTextNode.get()); |
| } |
| |
| void XMLDocumentParser::exitText() |
| { |
| if (isStopped()) |
| return; |
| |
| if (!m_leafTextNode) |
| return; |
| |
| m_leafTextNode->appendData(toString(m_bufferedText.data(), m_bufferedText.size())); |
| m_bufferedText.clear(); |
| m_leafTextNode = 0; |
| } |
| |
| void XMLDocumentParser::detach() |
| { |
| clearCurrentNodeStack(); |
| ScriptableDocumentParser::detach(); |
| } |
| |
| void XMLDocumentParser::end() |
| { |
| // XMLDocumentParserLibxml2 will do bad things to the document if doEnd() is called. |
| // I don't believe XMLDocumentParserQt needs doEnd called in the fragment case. |
| ASSERT(!m_parsingFragment); |
| |
| doEnd(); |
| |
| // doEnd() call above can detach the parser and null out its document. |
| // In that case, we just bail out. |
| if (isDetached()) |
| return; |
| |
| // doEnd() could process a script tag, thus pausing parsing. |
| if (m_parserPaused) |
| return; |
| |
| if (m_sawError) |
| insertErrorMessageBlock(); |
| else { |
| exitText(); |
| document()->styleResolverChanged(RecalcStyleImmediately); |
| } |
| |
| if (isParsing()) |
| prepareToStopParsing(); |
| document()->setReadyState(Document::Interactive); |
| clearCurrentNodeStack(); |
| document()->finishedParsing(); |
| } |
| |
| void XMLDocumentParser::finish() |
| { |
| // FIXME: We should ASSERT(!m_parserStopped) here, since it does not |
| // makes sense to call any methods on DocumentParser once it's been stopped. |
| // However, FrameLoader::stop calls DocumentParser::finish unconditionally. |
| |
| if (m_parserPaused) |
| m_finishCalled = true; |
| else |
| end(); |
| } |
| |
| void XMLDocumentParser::insertErrorMessageBlock() |
| { |
| m_xmlErrors.insertErrorMessageBlock(); |
| } |
| |
| void XMLDocumentParser::notifyFinished(Resource* unusedResource) |
| { |
| ASSERT_UNUSED(unusedResource, unusedResource == m_pendingScript); |
| ASSERT(m_pendingScript->accessCount() > 0); |
| |
| ScriptSourceCode sourceCode(m_pendingScript.get()); |
| bool errorOccurred = m_pendingScript->errorOccurred(); |
| bool wasCanceled = m_pendingScript->wasCanceled(); |
| |
| m_pendingScript->removeClient(this); |
| m_pendingScript = 0; |
| |
| RefPtr<Element> e = m_scriptElement; |
| m_scriptElement = 0; |
| |
| ScriptLoader* scriptLoader = toScriptLoaderIfPossible(e.get()); |
| ASSERT(scriptLoader); |
| |
| // JavaScript can detach this parser, make sure it's kept alive even if detached. |
| RefPtr<XMLDocumentParser> protect(this); |
| |
| if (errorOccurred) |
| scriptLoader->dispatchErrorEvent(); |
| else if (!wasCanceled) { |
| scriptLoader->executeScript(sourceCode); |
| scriptLoader->dispatchLoadEvent(); |
| } |
| |
| m_scriptElement = 0; |
| |
| if (!isDetached() && !m_requestingScript) |
| resumeParsing(); |
| } |
| |
| bool XMLDocumentParser::isWaitingForScripts() const |
| { |
| return m_pendingScript; |
| } |
| |
| void XMLDocumentParser::pauseParsing() |
| { |
| if (m_parsingFragment) |
| return; |
| |
| m_parserPaused = true; |
| } |
| |
| bool XMLDocumentParser::parseDocumentFragment(const String& chunk, DocumentFragment* fragment, Element* contextElement, ParserContentPolicy parserContentPolicy) |
| { |
| if (!chunk.length()) |
| return true; |
| |
| // FIXME: We need to implement the HTML5 XML Fragment parsing algorithm: |
| // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-xhtml-syntax.html#xml-fragment-parsing-algorithm |
| // For now we have a hack for script/style innerHTML support: |
| if (contextElement && (contextElement->hasLocalName(HTMLNames::scriptTag) || contextElement->hasLocalName(HTMLNames::styleTag))) { |
| fragment->parserAppendChild(fragment->document().createTextNode(chunk)); |
| return true; |
| } |
| |
| RefPtr<XMLDocumentParser> parser = XMLDocumentParser::create(fragment, contextElement, parserContentPolicy); |
| bool wellFormed = parser->appendFragmentSource(chunk); |
| // Do not call finish(). Current finish() and doEnd() implementations touch the main Document/loader |
| // and can cause crashes in the fragment case. |
| parser->detach(); // Allows ~DocumentParser to assert it was detached before destruction. |
| return wellFormed; // appendFragmentSource()'s wellFormed is more permissive than wellFormed(). |
| } |
| |
| static int globalDescriptor = 0; |
| static ThreadIdentifier libxmlLoaderThread = 0; |
| |
| static int matchFunc(const char*) |
| { |
| // Only match loads initiated due to uses of libxml2 from within XMLDocumentParser to avoid |
| // interfering with client applications that also use libxml2. http://bugs.webkit.org/show_bug.cgi?id=17353 |
| return XMLDocumentParserScope::currentFetcher && currentThread() == libxmlLoaderThread; |
| } |
| |
| class OffsetBuffer { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| OffsetBuffer(const Vector<char>& b) : m_buffer(b), m_currentOffset(0) { } |
| |
| int readOutBytes(char* outputBuffer, unsigned askedToRead) |
| { |
| unsigned bytesLeft = m_buffer.size() - m_currentOffset; |
| unsigned lenToCopy = min(askedToRead, bytesLeft); |
| if (lenToCopy) { |
| memcpy(outputBuffer, m_buffer.data() + m_currentOffset, lenToCopy); |
| m_currentOffset += lenToCopy; |
| } |
| return lenToCopy; |
| } |
| |
| private: |
| Vector<char> m_buffer; |
| unsigned m_currentOffset; |
| }; |
| |
| static inline void setAttributes(Element* element, Vector<Attribute>& attributeVector, ParserContentPolicy parserContentPolicy) |
| { |
| if (!scriptingContentIsAllowed(parserContentPolicy)) |
| element->stripScriptingAttributes(attributeVector); |
| element->parserSetAttributes(attributeVector); |
| } |
| |
| static void switchEncoding(xmlParserCtxtPtr ctxt, bool is8Bit) |
| { |
| // Hack around libxml2's lack of encoding overide support by manually |
| // resetting the encoding to UTF-16 before every chunk. Otherwise libxml |
| // will detect <?xml version="1.0" encoding="<encoding name>"?> blocks |
| // and switch encodings, causing the parse to fail. |
| if (is8Bit) { |
| xmlSwitchEncoding(ctxt, XML_CHAR_ENCODING_8859_1); |
| return; |
| } |
| |
| const UChar BOM = 0xFEFF; |
| const unsigned char BOMHighByte = *reinterpret_cast<const unsigned char*>(&BOM); |
| xmlSwitchEncoding(ctxt, BOMHighByte == 0xFF ? XML_CHAR_ENCODING_UTF16LE : XML_CHAR_ENCODING_UTF16BE); |
| } |
| |
| static void parseChunk(xmlParserCtxtPtr ctxt, const String& chunk) |
| { |
| bool is8Bit = chunk.is8Bit(); |
| switchEncoding(ctxt, is8Bit); |
| if (is8Bit) |
| xmlParseChunk(ctxt, reinterpret_cast<const char*>(chunk.characters8()), sizeof(LChar) * chunk.length(), 0); |
| else |
| xmlParseChunk(ctxt, reinterpret_cast<const char*>(chunk.characters16()), sizeof(UChar) * chunk.length(), 0); |
| } |
| |
| static void finishParsing(xmlParserCtxtPtr ctxt) |
| { |
| xmlParseChunk(ctxt, 0, 0, 1); |
| } |
| |
| #define xmlParseChunk #error "Use parseChunk instead to select the correct encoding." |
| |
| static bool isLibxmlDefaultCatalogFile(const String& urlString) |
| { |
| // On non-Windows platforms libxml asks for this URL, the |
| // "XML_XML_DEFAULT_CATALOG", on initialization. |
| if (urlString == "file:///etc/xml/catalog") |
| return true; |
| |
| // On Windows, libxml computes a URL relative to where its DLL resides. |
| if (urlString.startsWith("file:///", false) && urlString.endsWith("/etc/catalog", false)) |
| return true; |
| return false; |
| } |
| |
| static bool shouldAllowExternalLoad(const KURL& url) |
| { |
| String urlString = url.string(); |
| |
| // This isn't really necessary now that initializeLibXMLIfNecessary |
| // disables catalog support in libxml, but keeping it for defense in depth. |
| if (isLibxmlDefaultCatalogFile(url)) |
| return false; |
| |
| // The most common DTD. There isn't much point in hammering www.w3c.org |
| // by requesting this URL for every XHTML document. |
| if (urlString.startsWith("http://www.w3.org/TR/xhtml", false)) |
| return false; |
| |
| // Similarly, there isn't much point in requesting the SVG DTD. |
| if (urlString.startsWith("http://www.w3.org/Graphics/SVG", false)) |
| return false; |
| |
| // The libxml doesn't give us a lot of context for deciding whether to |
| // allow this request. In the worst case, this load could be for an |
| // external entity and the resulting document could simply read the |
| // retrieved content. If we had more context, we could potentially allow |
| // the parser to load a DTD. As things stand, we take the conservative |
| // route and allow same-origin requests only. |
| if (!XMLDocumentParserScope::currentFetcher->document()->securityOrigin()->canRequest(url)) { |
| XMLDocumentParserScope::currentFetcher->printAccessDeniedMessage(url); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static void* openFunc(const char* uri) |
| { |
| ASSERT(XMLDocumentParserScope::currentFetcher); |
| ASSERT(currentThread() == libxmlLoaderThread); |
| |
| KURL url(KURL(), uri); |
| |
| if (!shouldAllowExternalLoad(url)) |
| return &globalDescriptor; |
| |
| KURL finalURL; |
| Vector<char> data; |
| |
| { |
| ResourceFetcher* fetcher = XMLDocumentParserScope::currentFetcher; |
| XMLDocumentParserScope scope(0); |
| // FIXME: We should restore the original global error handler as well. |
| |
| if (fetcher->frame()) { |
| FetchRequest request(ResourceRequest(url), FetchInitiatorTypeNames::xml, ResourceFetcher::defaultResourceOptions()); |
| ResourcePtr<Resource> resource = fetcher->fetchSynchronously(request); |
| if (resource && !resource->errorOccurred()) { |
| resource->resourceBuffer()->moveTo(data); |
| finalURL = resource->response().url(); |
| } |
| } |
| } |
| |
| // We have to check the URL again after the load to catch redirects. |
| // See <https://bugs.webkit.org/show_bug.cgi?id=21963>. |
| if (!shouldAllowExternalLoad(finalURL)) |
| return &globalDescriptor; |
| |
| return new OffsetBuffer(data); |
| } |
| |
| static int readFunc(void* context, char* buffer, int len) |
| { |
| // Do 0-byte reads in case of a null descriptor |
| if (context == &globalDescriptor) |
| return 0; |
| |
| OffsetBuffer* data = static_cast<OffsetBuffer*>(context); |
| return data->readOutBytes(buffer, len); |
| } |
| |
| static int writeFunc(void*, const char*, int) |
| { |
| // Always just do 0-byte writes |
| return 0; |
| } |
| |
| static int closeFunc(void* context) |
| { |
| if (context != &globalDescriptor) { |
| OffsetBuffer* data = static_cast<OffsetBuffer*>(context); |
| delete data; |
| } |
| return 0; |
| } |
| |
| static void errorFunc(void*, const char*, ...) |
| { |
| // FIXME: It would be nice to display error messages somewhere. |
| } |
| |
| static void initializeLibXMLIfNecessary() |
| { |
| static bool didInit = false; |
| if (didInit) |
| return; |
| |
| // We don't want libxml to try and load catalogs. |
| // FIXME: It's not nice to set global settings in libxml, embedders of Blink |
| // could be trying to use libxml themselves. |
| xmlCatalogSetDefaults(XML_CATA_ALLOW_NONE); |
| xmlInitParser(); |
| xmlRegisterInputCallbacks(matchFunc, openFunc, readFunc, closeFunc); |
| xmlRegisterOutputCallbacks(matchFunc, openFunc, writeFunc, closeFunc); |
| libxmlLoaderThread = currentThread(); |
| didInit = true; |
| } |
| |
| |
| PassRefPtr<XMLParserContext> XMLParserContext::createStringParser(xmlSAXHandlerPtr handlers, void* userData) |
| { |
| initializeLibXMLIfNecessary(); |
| xmlParserCtxtPtr parser = xmlCreatePushParserCtxt(handlers, 0, 0, 0, 0); |
| parser->_private = userData; |
| parser->replaceEntities = true; |
| return adoptRef(new XMLParserContext(parser)); |
| } |
| |
| // Chunk should be encoded in UTF-8 |
| PassRefPtr<XMLParserContext> XMLParserContext::createMemoryParser(xmlSAXHandlerPtr handlers, void* userData, const CString& chunk) |
| { |
| initializeLibXMLIfNecessary(); |
| |
| // appendFragmentSource() checks that the length doesn't overflow an int. |
| xmlParserCtxtPtr parser = xmlCreateMemoryParserCtxt(chunk.data(), chunk.length()); |
| |
| if (!parser) |
| return 0; |
| |
| // Copy the sax handler |
| memcpy(parser->sax, handlers, sizeof(xmlSAXHandler)); |
| |
| // Set parser options. |
| // XML_PARSE_NODICT: default dictionary option. |
| // XML_PARSE_NOENT: force entities substitutions. |
| xmlCtxtUseOptions(parser, XML_PARSE_NODICT | XML_PARSE_NOENT); |
| |
| // Internal initialization |
| parser->sax2 = 1; |
| parser->instate = XML_PARSER_CONTENT; // We are parsing a CONTENT |
| parser->depth = 0; |
| parser->str_xml = xmlDictLookup(parser->dict, BAD_CAST "xml", 3); |
| parser->str_xmlns = xmlDictLookup(parser->dict, BAD_CAST "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_context(0) |
| , m_currentNode(document) |
| , m_isCurrentlyParsing8BitChunk(false) |
| , m_sawError(false) |
| , m_sawCSS(false) |
| , m_sawXSLTransform(false) |
| , m_sawFirstElement(false) |
| , m_isXHTMLDocument(false) |
| , m_parserPaused(false) |
| , m_requestingScript(false) |
| , m_finishCalled(false) |
| , m_xmlErrors(document) |
| , m_pendingScript(0) |
| , m_scriptStartPosition(TextPosition::belowRangePosition()) |
| , m_parsingFragment(false) |
| { |
| // This is XML being used as a document resource. |
| UseCounter::count(document, UseCounter::XMLDocument); |
| } |
| |
| XMLDocumentParser::XMLDocumentParser(DocumentFragment* fragment, Element* parentElement, ParserContentPolicy parserContentPolicy) |
| : ScriptableDocumentParser(&fragment->document(), parserContentPolicy) |
| , m_view(0) |
| , m_context(0) |
| , m_currentNode(fragment) |
| , m_isCurrentlyParsing8BitChunk(false) |
| , m_sawError(false) |
| , m_sawCSS(false) |
| , m_sawXSLTransform(false) |
| , m_sawFirstElement(false) |
| , m_isXHTMLDocument(false) |
| , m_parserPaused(false) |
| , m_requestingScript(false) |
| , m_finishCalled(false) |
| , m_xmlErrors(&fragment->document()) |
| , m_pendingScript(0) |
| , m_scriptStartPosition(TextPosition::belowRangePosition()) |
| , m_parsingFragment(true) |
| { |
| fragment->ref(); |
| |
| // Add namespaces based on the parent node |
| Vector<Element*> elemStack; |
| while (parentElement) { |
| elemStack.append(parentElement); |
| |
| ContainerNode* n = parentElement->parentNode(); |
| if (!n || !n->isElementNode()) |
| break; |
| parentElement = toElement(n); |
| } |
| |
| if (elemStack.isEmpty()) |
| return; |
| |
| for (; !elemStack.isEmpty(); elemStack.removeLast()) { |
| Element* element = elemStack.last(); |
| if (element->hasAttributes()) { |
| for (unsigned i = 0; i < element->attributeCount(); i++) { |
| const Attribute* attribute = element->attributeItem(i); |
| if (attribute->localName() == xmlnsAtom) |
| m_defaultNamespaceURI = attribute->value(); |
| else if (attribute->prefix() == xmlnsAtom) |
| m_prefixToNamespaceMap.set(attribute->localName(), attribute->value()); |
| } |
| } |
| } |
| |
| // If the parent element is not in document tree, there may be no xmlns attribute; just default to the parent's namespace. |
| if (m_defaultNamespaceURI.isNull() && !parentElement->inDocument()) |
| m_defaultNamespaceURI = parentElement->namespaceURI(); |
| } |
| |
| 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->removeClient(this); |
| } |
| |
| 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 parseChunk |
| // keep this alive until this function is done. |
| RefPtr<XMLDocumentParser> protect(this); |
| |
| XMLDocumentParserScope scope(document()->fetcher()); |
| TemporaryChange<bool> encodingScope(m_isCurrentlyParsing8BitChunk, parseString.is8Bit()); |
| parseChunk(context->context(), parseString); |
| |
| // JavaScript (which may be run under the parseChunk 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); |
| } |
| } |
| |
| struct _xmlSAX2Namespace { |
| const xmlChar* prefix; |
| const xmlChar* uri; |
| }; |
| typedef struct _xmlSAX2Namespace xmlSAX2Namespace; |
| |
| static inline void handleNamespaceAttributes(Vector<Attribute>& prefixedAttributes, const xmlChar** libxmlNamespaces, int nbNamespaces, ExceptionState& es) |
| { |
| xmlSAX2Namespace* namespaces = reinterpret_cast<xmlSAX2Namespace*>(libxmlNamespaces); |
| for (int i = 0; i < nbNamespaces; i++) { |
| AtomicString namespaceQName = xmlnsAtom; |
| AtomicString namespaceURI = toAtomicString(namespaces[i].uri); |
| if (namespaces[i].prefix) |
| namespaceQName = "xmlns:" + toString(namespaces[i].prefix); |
| |
| QualifiedName parsedName = anyName; |
| if (!Element::parseAttributeName(parsedName, XMLNSNames::xmlnsNamespaceURI, namespaceQName, es)) |
| return; |
| |
| prefixedAttributes.append(Attribute(parsedName, namespaceURI)); |
| } |
| } |
| |
| struct _xmlSAX2Attributes { |
| const xmlChar* localname; |
| const xmlChar* prefix; |
| const xmlChar* uri; |
| const xmlChar* value; |
| const xmlChar* end; |
| }; |
| typedef struct _xmlSAX2Attributes xmlSAX2Attributes; |
| |
| static inline void handleElementAttributes(Vector<Attribute>& prefixedAttributes, const xmlChar** libxmlAttributes, int nbAttributes, ExceptionState& es) |
| { |
| xmlSAX2Attributes* attributes = reinterpret_cast<xmlSAX2Attributes*>(libxmlAttributes); |
| for (int i = 0; i < nbAttributes; i++) { |
| int valueLength = static_cast<int>(attributes[i].end - attributes[i].value); |
| AtomicString attrValue = toAtomicString(attributes[i].value, valueLength); |
| String attrPrefix = toString(attributes[i].prefix); |
| AtomicString attrURI = attrPrefix.isEmpty() ? AtomicString() : toAtomicString(attributes[i].uri); |
| AtomicString attrQName = attrPrefix.isEmpty() ? toAtomicString(attributes[i].localname) : attrPrefix + ":" + toString(attributes[i].localname); |
| |
| QualifiedName parsedName = anyName; |
| if (!Element::parseAttributeName(parsedName, attrURI, attrQName, es)) |
| return; |
| |
| prefixedAttributes.append(Attribute(parsedName, attrValue)); |
| } |
| } |
| |
| void XMLDocumentParser::startElementNs(const AtomicString& localName, const AtomicString& prefix, const AtomicString& uri, int nbNamespaces, |
| const xmlChar** libxmlNamespaces, int nbAttributes, int nbDefaulted, const xmlChar** libxmlAttributes) |
| { |
| if (isStopped()) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks.append(adoptPtr(new PendingStartElementNSCallback(localName, prefix, uri, nbNamespaces, libxmlNamespaces, |
| nbAttributes, nbDefaulted, libxmlAttributes))); |
| return; |
| } |
| |
| exitText(); |
| |
| AtomicString adjustedURI = uri; |
| if (m_parsingFragment && adjustedURI.isNull()) { |
| if (!prefix.isNull()) |
| adjustedURI = m_prefixToNamespaceMap.get(prefix); |
| else |
| adjustedURI = m_defaultNamespaceURI; |
| } |
| |
| bool isFirstElement = !m_sawFirstElement; |
| m_sawFirstElement = true; |
| |
| QualifiedName qName(prefix, localName, adjustedURI); |
| RefPtr<Element> newElement = m_currentNode->document().createElement(qName, true); |
| if (!newElement) { |
| stopParsing(); |
| return; |
| } |
| |
| Vector<Attribute> prefixedAttributes; |
| TrackExceptionState es; |
| handleNamespaceAttributes(prefixedAttributes, libxmlNamespaces, nbNamespaces, es); |
| if (es.hadException()) { |
| setAttributes(newElement.get(), prefixedAttributes, parserContentPolicy()); |
| stopParsing(); |
| return; |
| } |
| |
| handleElementAttributes(prefixedAttributes, libxmlAttributes, nbAttributes, es); |
| setAttributes(newElement.get(), prefixedAttributes, parserContentPolicy()); |
| if (es.hadException()) { |
| stopParsing(); |
| return; |
| } |
| |
| newElement->beginParsingChildren(); |
| |
| ScriptLoader* scriptLoader = toScriptLoaderIfPossible(newElement.get()); |
| if (scriptLoader) |
| m_scriptStartPosition = textPosition(); |
| |
| m_currentNode->parserAppendChild(newElement.get()); |
| |
| const ContainerNode* currentNode = m_currentNode; |
| if (newElement->hasTagName(HTMLNames::templateTag)) |
| pushCurrentNode(toHTMLTemplateElement(newElement.get())->content()); |
| else |
| pushCurrentNode(newElement.get()); |
| |
| if (isHTMLHtmlElement(newElement.get())) |
| toHTMLHtmlElement(newElement.get())->insertedByParser(); |
| |
| if (!m_parsingFragment && isFirstElement && document()->frame()) |
| document()->frame()->loader()->dispatchDocumentElementAvailable(); |
| } |
| |
| void XMLDocumentParser::endElementNs() |
| { |
| if (isStopped()) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks.append(adoptPtr(new PendingEndElementNSCallback())); |
| return; |
| } |
| |
| // JavaScript can detach the parser. Make sure this is not released |
| // before the end of this method. |
| RefPtr<XMLDocumentParser> protect(this); |
| |
| exitText(); |
| |
| RefPtr<ContainerNode> n = m_currentNode; |
| n->finishParsingChildren(); |
| |
| if (!scriptingContentIsAllowed(parserContentPolicy()) && n->isElementNode() && toScriptLoaderIfPossible(toElement(n.get()))) { |
| popCurrentNode(); |
| n->remove(IGNORE_EXCEPTION); |
| return; |
| } |
| |
| if (!n->isElementNode() || !m_view) { |
| popCurrentNode(); |
| return; |
| } |
| |
| Element* element = toElement(n.get()); |
| |
| // The element's parent may have already been removed from document. |
| // Parsing continues in this case, but scripts aren't executed. |
| if (!element->inDocument()) { |
| popCurrentNode(); |
| return; |
| } |
| |
| ScriptLoader* scriptLoader = toScriptLoaderIfPossible(element); |
| if (!scriptLoader) { |
| popCurrentNode(); |
| return; |
| } |
| |
| // Don't load external scripts for standalone documents (for now). |
| ASSERT(!m_pendingScript); |
| m_requestingScript = true; |
| |
| if (scriptLoader->prepareScript(m_scriptStartPosition, ScriptLoader::AllowLegacyTypeInTypeAttribute)) { |
| // FIXME: Script execution should be shared between |
| // the libxml2 and Qt XMLDocumentParser implementations. |
| |
| if (scriptLoader->readyToBeParserExecuted()) { |
| scriptLoader->executeScript(ScriptSourceCode(scriptLoader->scriptContent(), document()->url(), m_scriptStartPosition)); |
| } else if (scriptLoader->willBeParserExecuted()) { |
| m_pendingScript = scriptLoader->resource(); |
| m_scriptElement = element; |
| m_pendingScript->addClient(this); |
| |
| // m_pendingScript will be 0 if script was already loaded and addClient() executed it. |
| if (m_pendingScript) |
| pauseParsing(); |
| } else { |
| m_scriptElement = 0; |
| } |
| |
| // JavaScript may have detached the parser |
| if (isDetached()) |
| return; |
| } |
| m_requestingScript = false; |
| popCurrentNode(); |
| } |
| |
| void XMLDocumentParser::characters(const xmlChar* chars, int length) |
| { |
| if (isStopped()) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks.append(adoptPtr(new PendingCharactersCallback(chars, length))); |
| return; |
| } |
| |
| if (!m_leafTextNode) |
| enterText(); |
| m_bufferedText.append(chars, length); |
| } |
| |
| void XMLDocumentParser::error(XMLErrors::ErrorType type, const char* message, va_list args) |
| { |
| if (isStopped()) |
| return; |
| |
| #if HAVE(VASPRINTF) |
| char* formattedMessage; |
| if (vasprintf(&formattedMessage, message, args) == -1) |
| return; |
| #else |
| char formattedMessage[1024]; |
| vsnprintf(formattedMessage, sizeof(formattedMessage) - 1, message, args); |
| #endif |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks.append(adoptPtr(new PendingErrorCallback(type, reinterpret_cast<const xmlChar*>(formattedMessage), lineNumber(), columnNumber()))); |
| #if HAVE(VASPRINTF) |
| free(formattedMessage); |
| #endif |
| return; |
| } |
| |
| handleError(type, formattedMessage, textPosition()); |
| |
| #if HAVE(VASPRINTF) |
| free(formattedMessage); |
| #endif |
| } |
| |
| void XMLDocumentParser::processingInstruction(const String& target, const String& data) |
| { |
| if (isStopped()) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks.append(adoptPtr(new PendingProcessingInstructionCallback(target ,data))); |
| return; |
| } |
| |
| exitText(); |
| |
| // ### handle exceptions |
| TrackExceptionState es; |
| RefPtr<ProcessingInstruction> pi = m_currentNode->document().createProcessingInstruction(target, data, es); |
| if (es.hadException()) |
| return; |
| |
| pi->setCreatedByParser(true); |
| |
| m_currentNode->parserAppendChild(pi.get()); |
| |
| pi->finishParsingChildren(); |
| |
| if (pi->isCSS()) |
| m_sawCSS = true; |
| m_sawXSLTransform = !m_sawFirstElement && pi->isXSL(); |
| if (m_sawXSLTransform && !document()->transformSourceDocument()) |
| stopParsing(); |
| } |
| |
| void XMLDocumentParser::cdataBlock(const String& text) |
| { |
| if (isStopped()) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks.append(adoptPtr(new PendingCDATABlockCallback(text))); |
| return; |
| } |
| |
| exitText(); |
| |
| RefPtr<CDATASection> newNode = CDATASection::create(m_currentNode->document(), text); |
| m_currentNode->parserAppendChild(newNode.get()); |
| } |
| |
| void XMLDocumentParser::comment(const String& text) |
| { |
| if (isStopped()) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks.append(adoptPtr(new PendingCommentCallback(text))); |
| return; |
| } |
| |
| exitText(); |
| |
| RefPtr<Comment> newNode = Comment::create(m_currentNode->document(), text); |
| m_currentNode->parserAppendChild(newNode.get()); |
| } |
| |
| enum StandaloneInfo { |
| StandaloneUnspecified = -2, |
| NoXMlDeclaration, |
| StandaloneNo, |
| StandaloneYes |
| }; |
| |
| void XMLDocumentParser::startDocument(const String& version, const String& encoding, int standalone) |
| { |
| StandaloneInfo standaloneInfo = (StandaloneInfo)standalone; |
| if (standaloneInfo == NoXMlDeclaration) { |
| document()->setHasXMLDeclaration(false); |
| return; |
| } |
| |
| if (!version.isNull()) |
| document()->setXMLVersion(version, ASSERT_NO_EXCEPTION); |
| if (standalone != StandaloneUnspecified) |
| document()->setXMLStandalone(standaloneInfo == StandaloneYes, ASSERT_NO_EXCEPTION); |
| if (!encoding.isNull()) |
| document()->setXMLEncoding(encoding); |
| document()->setHasXMLDeclaration(true); |
| } |
| |
| void XMLDocumentParser::endDocument() |
| { |
| exitText(); |
| } |
| |
| void XMLDocumentParser::internalSubset(const String& name, const String& externalID, const String& systemID) |
| { |
| if (isStopped()) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks.append(adoptPtr(new PendingInternalSubsetCallback(name, externalID, systemID))); |
| return; |
| } |
| |
| if (document()) |
| document()->parserAppendChild(DocumentType::create(document(), name, externalID, systemID)); |
| } |
| |
| static inline XMLDocumentParser* getParser(void* closure) |
| { |
| xmlParserCtxtPtr ctxt = static_cast<xmlParserCtxtPtr>(closure); |
| return static_cast<XMLDocumentParser*>(ctxt->_private); |
| } |
| |
| static void startElementNsHandler(void* closure, const xmlChar* localName, const xmlChar* prefix, const xmlChar* uri, int nbNamespaces, const xmlChar** namespaces, int nbAttributes, int nbDefaulted, const xmlChar** libxmlAttributes) |
| { |
| getParser(closure)->startElementNs(toAtomicString(localName), toAtomicString(prefix), toAtomicString(uri), nbNamespaces, namespaces, nbAttributes, nbDefaulted, libxmlAttributes); |
| } |
| |
| static void endElementNsHandler(void* closure, const xmlChar*, const xmlChar*, const xmlChar*) |
| { |
| getParser(closure)->endElementNs(); |
| } |
| |
| static void charactersHandler(void* closure, const xmlChar* chars, int length) |
| { |
| getParser(closure)->characters(chars, length); |
| } |
| |
| static void processingInstructionHandler(void* closure, const xmlChar* target, const xmlChar* data) |
| { |
| getParser(closure)->processingInstruction(toString(target), toString(data)); |
| } |
| |
| static void cdataBlockHandler(void* closure, const xmlChar* text, int length) |
| { |
| getParser(closure)->cdataBlock(toString(text, length)); |
| } |
| |
| static void commentHandler(void* closure, const xmlChar* text) |
| { |
| getParser(closure)->comment(toString(text)); |
| } |
| |
| 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; |
| WTF::Unicode::ConversionResult 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 xmlEntityPtr getEntityHandler(void* closure, const xmlChar* name) |
| { |
| xmlParserCtxtPtr ctxt = static_cast<xmlParserCtxtPtr>(closure); |
| xmlEntityPtr ent = xmlGetPredefinedEntity(name); |
| if (ent) { |
| ent->etype = XML_INTERNAL_PREDEFINED_ENTITY; |
| return ent; |
| } |
| |
| ent = xmlGetDocEntity(ctxt->myDoc, name); |
| if (!ent && getParser(closure)->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); |
| XMLDocumentParser* parser = getParser(closure); |
| switchEncoding(ctxt, parser->isCurrentlyParsing8BitChunk()); |
| parser->startDocument(toString(ctxt->version), toString(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(toString(name), toString(externalID), toString(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 == "-//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 = xmlSAX2EntityDecl; |
| sax.initialized = XML_SAX2_MAGIC; |
| DocumentParser::startParsing(); |
| m_sawError = false; |
| m_sawCSS = false; |
| m_sawXSLTransform = false; |
| m_sawFirstElement = false; |
| |
| XMLDocumentParserScope scope(document()->fetcher()); |
| 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()->fetcher()); |
| finishParsing(context()); |
| } |
| |
| m_context = 0; |
| } |
| } |
| |
| bool xmlViewerMode = !m_sawError && !m_sawCSS && !m_sawXSLTransform && hasNoStyleInformation(document()); |
| if (xmlViewerMode) { |
| XMLTreeViewer xmlTreeViewer(document()); |
| xmlTreeViewer.transformDocumentToTreeView(); |
| } else if (m_sawXSLTransform) { |
| xmlDocPtr doc = xmlDocPtrForString(document()->fetcher(), m_originalSourceForTransform.toString(), document()->url().string()); |
| document()->setTransformSource(adoptPtr(new TransformSource(doc))); |
| |
| document()->setParsing(false); // Make the document think it's done, so it will apply XSL stylesheets. |
| document()->styleResolverChanged(RecalcStyleImmediately); |
| |
| // 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(); |
| } |
| } |
| |
| xmlDocPtr xmlDocPtrForString(ResourceFetcher* fetcher, const String& source, const String& url) |
| { |
| if (source.isEmpty()) |
| return 0; |
| // 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. |
| XMLDocumentParserScope scope(fetcher, errorFunc, 0); |
| XMLParserInput input(source); |
| return xmlReadMemory(input.data(), input.size(), url.latin1().data(), input.encoding(), XSLT_PARSE_OPTIONS); |
| } |
| |
| OrdinalNumber XMLDocumentParser::lineNumber() const |
| { |
| return OrdinalNumber::fromOneBasedInt(context() ? context()->input->line : 1); |
| } |
| |
| OrdinalNumber XMLDocumentParser::columnNumber() const |
| { |
| return OrdinalNumber::fromOneBasedInt(context() ? context()->input->col : 1); |
| } |
| |
| TextPosition XMLDocumentParser::textPosition() const |
| { |
| xmlParserCtxtPtr context = this->context(); |
| if (!context) |
| return TextPosition::minimumPosition(); |
| return TextPosition(OrdinalNumber::fromOneBasedInt(context->input->line), |
| OrdinalNumber::fromOneBasedInt(context->input->col)); |
| } |
| |
| void XMLDocumentParser::stopParsing() |
| { |
| 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()) { |
| OwnPtr<PendingCallback> callback = m_pendingCallbacks.takeFirst(); |
| callback->call(this); |
| |
| // A callback paused the parser |
| if (m_parserPaused) |
| return; |
| } |
| |
| // Then, write any pending data |
| SegmentedString rest = m_pendingSrc; |
| m_pendingSrc.clear(); |
| // 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. |
| append(rest.toString().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()); |
| } |
| |
| // -------------------------------- |
| |
| struct AttributeParseState { |
| HashMap<String, String> attributes; |
| bool gotAttributes; |
| }; |
| |
| static void attributesStartElementNsHandler(void* closure, const xmlChar* xmlLocalName, const xmlChar* /*xmlPrefix*/, |
| const xmlChar* /*xmlURI*/, int /*nbNamespaces*/, const xmlChar** /*namespaces*/, |
| int nbAttributes, int /*nbDefaulted*/, const xmlChar** libxmlAttributes) |
| { |
| if (strcmp(reinterpret_cast<const char*>(xmlLocalName), "attrs") != 0) |
| return; |
| |
| xmlParserCtxtPtr ctxt = static_cast<xmlParserCtxtPtr>(closure); |
| AttributeParseState* state = static_cast<AttributeParseState*>(ctxt->_private); |
| |
| state->gotAttributes = true; |
| |
| xmlSAX2Attributes* attributes = reinterpret_cast<xmlSAX2Attributes*>(libxmlAttributes); |
| for (int i = 0; i < nbAttributes; 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->attributes.set(attrQName, attrValue); |
| } |
| } |
| |
| HashMap<String, String> parseAttributes(const String& string, bool& attrsOK) |
| { |
| AttributeParseState state; |
| state.gotAttributes = false; |
| |
| xmlSAXHandler sax; |
| memset(&sax, 0, sizeof(sax)); |
| sax.startElementNs = attributesStartElementNsHandler; |
| sax.initialized = XML_SAX2_MAGIC; |
| RefPtr<XMLParserContext> parser = XMLParserContext::createStringParser(&sax, &state); |
| String parseString = "<?xml version=\"1.0\"?><attrs " + string + " />"; |
| parseChunk(parser->context(), parseString); |
| finishParsing(parser->context()); |
| attrsOK = state.gotAttributes; |
| return state.attributes; |
| } |
| |
| } // namespace WebCore |