| /* |
| * 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 |
| * |
| * 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 "XMLTokenizer.h" |
| |
| #include "CDATASection.h" |
| #include "CString.h" |
| #include "CachedScript.h" |
| #include "Comment.h" |
| #include "DocLoader.h" |
| #include "Document.h" |
| #include "DocumentFragment.h" |
| #include "DocumentType.h" |
| #include "Frame.h" |
| #include "FrameLoader.h" |
| #include "FrameView.h" |
| #include "HTMLLinkElement.h" |
| #include "HTMLStyleElement.h" |
| #include "HTMLTokenizer.h" |
| #include "ScriptController.h" |
| #include "ProcessingInstruction.h" |
| #include "ResourceError.h" |
| #include "ResourceHandle.h" |
| #include "ResourceRequest.h" |
| #include "ResourceResponse.h" |
| #include "ScriptElement.h" |
| #include "TextResourceDecoder.h" |
| #include <libxml/parser.h> |
| #include <libxml/parserInternals.h> |
| #include <wtf/Platform.h> |
| #include <wtf/StringExtras.h> |
| #include <wtf/Threading.h> |
| #include <wtf/Vector.h> |
| |
| #if ENABLE(XSLT) |
| #include <libxslt/xslt.h> |
| #endif |
| |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| class PendingCallbacks { |
| public: |
| PendingCallbacks() |
| { |
| m_callbacks.setAutoDelete(true); |
| } |
| |
| void appendStartElementNSCallback(const xmlChar* xmlLocalName, const xmlChar* xmlPrefix, const xmlChar* xmlURI, int nb_namespaces, |
| const xmlChar** namespaces, int nb_attributes, int nb_defaulted, const xmlChar** attributes) |
| { |
| PendingStartElementNSCallback* callback = new PendingStartElementNSCallback; |
| |
| callback->xmlLocalName = xmlStrdup(xmlLocalName); |
| callback->xmlPrefix = xmlStrdup(xmlPrefix); |
| callback->xmlURI = xmlStrdup(xmlURI); |
| callback->nb_namespaces = nb_namespaces; |
| callback->namespaces = reinterpret_cast<xmlChar**>(xmlMalloc(sizeof(xmlChar*) * nb_namespaces * 2)); |
| for (int i = 0; i < nb_namespaces * 2 ; i++) |
| callback->namespaces[i] = xmlStrdup(namespaces[i]); |
| callback->nb_attributes = nb_attributes; |
| callback->nb_defaulted = nb_defaulted; |
| callback->attributes = reinterpret_cast<xmlChar**>(xmlMalloc(sizeof(xmlChar*) * nb_attributes * 5)); |
| for (int i = 0; i < nb_attributes; i++) { |
| // Each attribute has 5 elements in the array: |
| // name, prefix, uri, value and an end pointer. |
| |
| for (int j = 0; j < 3; j++) |
| callback->attributes[i * 5 + j] = xmlStrdup(attributes[i * 5 + j]); |
| |
| int len = attributes[i * 5 + 4] - attributes[i * 5 + 3]; |
| |
| callback->attributes[i * 5 + 3] = xmlStrndup(attributes[i * 5 + 3], len); |
| callback->attributes[i * 5 + 4] = callback->attributes[i * 5 + 3] + len; |
| } |
| |
| m_callbacks.append(callback); |
| } |
| |
| void appendEndElementNSCallback() |
| { |
| PendingEndElementNSCallback* callback = new PendingEndElementNSCallback; |
| |
| m_callbacks.append(callback); |
| } |
| |
| void appendCharactersCallback(const xmlChar* s, int len) |
| { |
| PendingCharactersCallback* callback = new PendingCharactersCallback; |
| |
| callback->s = xmlStrndup(s, len); |
| callback->len = len; |
| |
| m_callbacks.append(callback); |
| } |
| |
| void appendProcessingInstructionCallback(const xmlChar* target, const xmlChar* data) |
| { |
| PendingProcessingInstructionCallback* callback = new PendingProcessingInstructionCallback; |
| |
| callback->target = xmlStrdup(target); |
| callback->data = xmlStrdup(data); |
| |
| m_callbacks.append(callback); |
| } |
| |
| void appendCDATABlockCallback(const xmlChar* s, int len) |
| { |
| PendingCDATABlockCallback* callback = new PendingCDATABlockCallback; |
| |
| callback->s = xmlStrndup(s, len); |
| callback->len = len; |
| |
| m_callbacks.append(callback); |
| } |
| |
| void appendCommentCallback(const xmlChar* s) |
| { |
| PendingCommentCallback* callback = new PendingCommentCallback; |
| |
| callback->s = xmlStrdup(s); |
| |
| m_callbacks.append(callback); |
| } |
| |
| void appendInternalSubsetCallback(const xmlChar* name, const xmlChar* externalID, const xmlChar* systemID) |
| { |
| PendingInternalSubsetCallback* callback = new PendingInternalSubsetCallback; |
| |
| callback->name = xmlStrdup(name); |
| callback->externalID = xmlStrdup(externalID); |
| callback->systemID = xmlStrdup(systemID); |
| |
| m_callbacks.append(callback); |
| } |
| |
| void appendErrorCallback(XMLTokenizer::ErrorType type, const char* message, int lineNumber, int columnNumber) |
| { |
| PendingErrorCallback* callback = new PendingErrorCallback; |
| |
| callback->message = strdup(message); |
| callback->type = type; |
| callback->lineNumber = lineNumber; |
| callback->columnNumber = columnNumber; |
| |
| m_callbacks.append(callback); |
| } |
| |
| void callAndRemoveFirstCallback(XMLTokenizer* tokenizer) |
| { |
| PendingCallback* cb = m_callbacks.getFirst(); |
| |
| cb->call(tokenizer); |
| m_callbacks.removeFirst(); |
| } |
| |
| bool isEmpty() const { return m_callbacks.isEmpty(); } |
| |
| private: |
| struct PendingCallback { |
| |
| virtual ~PendingCallback() { } |
| |
| virtual void call(XMLTokenizer* tokenizer) = 0; |
| }; |
| |
| struct PendingStartElementNSCallback : public PendingCallback { |
| virtual ~PendingStartElementNSCallback() { |
| xmlFree(xmlLocalName); |
| xmlFree(xmlPrefix); |
| xmlFree(xmlURI); |
| for (int i = 0; i < nb_namespaces * 2; i++) |
| xmlFree(namespaces[i]); |
| xmlFree(namespaces); |
| for (int i = 0; i < nb_attributes; i++) |
| for (int j = 0; j < 4; j++) |
| xmlFree(attributes[i * 5 + j]); |
| xmlFree(attributes); |
| } |
| |
| virtual void call(XMLTokenizer* tokenizer) { |
| tokenizer->startElementNs(xmlLocalName, xmlPrefix, xmlURI, |
| nb_namespaces, (const xmlChar**)namespaces, |
| nb_attributes, nb_defaulted, (const xmlChar**)(attributes)); |
| } |
| |
| xmlChar* xmlLocalName; |
| xmlChar* xmlPrefix; |
| xmlChar* xmlURI; |
| int nb_namespaces; |
| xmlChar** namespaces; |
| int nb_attributes; |
| int nb_defaulted; |
| xmlChar** attributes; |
| }; |
| |
| struct PendingEndElementNSCallback : public PendingCallback { |
| virtual void call(XMLTokenizer* tokenizer) |
| { |
| tokenizer->endElementNs(); |
| } |
| }; |
| |
| struct PendingCharactersCallback : public PendingCallback { |
| virtual ~PendingCharactersCallback() |
| { |
| xmlFree(s); |
| } |
| |
| virtual void call(XMLTokenizer* tokenizer) |
| { |
| tokenizer->characters(s, len); |
| } |
| |
| xmlChar* s; |
| int len; |
| }; |
| |
| struct PendingProcessingInstructionCallback : public PendingCallback { |
| virtual ~PendingProcessingInstructionCallback() |
| { |
| xmlFree(target); |
| xmlFree(data); |
| } |
| |
| virtual void call(XMLTokenizer* tokenizer) |
| { |
| tokenizer->processingInstruction(target, data); |
| } |
| |
| xmlChar* target; |
| xmlChar* data; |
| }; |
| |
| struct PendingCDATABlockCallback : public PendingCallback { |
| virtual ~PendingCDATABlockCallback() |
| { |
| xmlFree(s); |
| } |
| |
| virtual void call(XMLTokenizer* tokenizer) |
| { |
| tokenizer->cdataBlock(s, len); |
| } |
| |
| xmlChar* s; |
| int len; |
| }; |
| |
| struct PendingCommentCallback : public PendingCallback { |
| virtual ~PendingCommentCallback() |
| { |
| xmlFree(s); |
| } |
| |
| virtual void call(XMLTokenizer* tokenizer) |
| { |
| tokenizer->comment(s); |
| } |
| |
| xmlChar* s; |
| }; |
| |
| struct PendingInternalSubsetCallback : public PendingCallback { |
| virtual ~PendingInternalSubsetCallback() |
| { |
| xmlFree(name); |
| xmlFree(externalID); |
| xmlFree(systemID); |
| } |
| |
| virtual void call(XMLTokenizer* tokenizer) |
| { |
| tokenizer->internalSubset(name, externalID, systemID); |
| } |
| |
| xmlChar* name; |
| xmlChar* externalID; |
| xmlChar* systemID; |
| }; |
| |
| struct PendingErrorCallback: public PendingCallback { |
| virtual ~PendingErrorCallback() |
| { |
| free (message); |
| } |
| |
| virtual void call(XMLTokenizer* tokenizer) |
| { |
| tokenizer->handleError(type, message, lineNumber, columnNumber); |
| } |
| |
| XMLTokenizer::ErrorType type; |
| char* message; |
| int lineNumber; |
| int columnNumber; |
| }; |
| |
| public: |
| DeprecatedPtrList<PendingCallback> m_callbacks; |
| }; |
| // -------------------------------- |
| |
| static int globalDescriptor = 0; |
| static DocLoader* globalDocLoader = 0; |
| static ThreadIdentifier libxmlLoaderThread = 0; |
| |
| static int matchFunc(const char* uri) |
| { |
| // Only match loads initiated due to uses of libxml2 from within XMLTokenizer to avoid |
| // interfering with client applications that also use libxml2. http://bugs.webkit.org/show_bug.cgi?id=17353 |
| return globalDocLoader && currentThread() == libxmlLoaderThread; |
| } |
| |
| class OffsetBuffer { |
| 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 bool shouldAllowExternalLoad(const KURL& url) |
| { |
| String urlString = url.string(); |
| |
| // On non-Windows platforms libxml asks for this URL, the |
| // "XML_XML_DEFAULT_CATALOG", on initialization. |
| if (urlString == "file:///etc/xml/catalog") |
| return false; |
| |
| // On Windows, libxml computes a URL relative to where its DLL resides. |
| if (urlString.startsWith("file:///", false) && urlString.endsWith("/etc/catalog", false)) |
| 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 (!globalDocLoader->doc()->securityOrigin()->canRequest(url)) { |
| globalDocLoader->printAccessDeniedMessage(url); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static void* openFunc(const char* uri) |
| { |
| ASSERT(globalDocLoader); |
| ASSERT(currentThread() == libxmlLoaderThread); |
| |
| KURL url(uri); |
| |
| if (!shouldAllowExternalLoad(url)) |
| return &globalDescriptor; |
| |
| ResourceError error; |
| ResourceResponse response; |
| Vector<char> data; |
| |
| DocLoader* docLoader = globalDocLoader; |
| globalDocLoader = 0; |
| // FIXME: We should restore the original global error handler as well. |
| |
| if (docLoader->frame()) |
| docLoader->frame()->loader()->loadResourceSynchronously(url, error, response, data); |
| |
| globalDocLoader = docLoader; |
| |
| // 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(response.url())) |
| 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* context, const char* buffer, int len) |
| { |
| // 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; |
| } |
| |
| #if ENABLE(XSLT) |
| static void errorFunc(void*, const char*, ...) |
| { |
| // FIXME: It would be nice to display error messages somewhere. |
| } |
| #endif |
| |
| void setLoaderForLibXMLCallbacks(DocLoader* docLoader) |
| { |
| globalDocLoader = docLoader; |
| } |
| |
| static bool didInit = false; |
| |
| static xmlParserCtxtPtr createStringParser(xmlSAXHandlerPtr handlers, void* userData) |
| { |
| if (!didInit) { |
| xmlInitParser(); |
| xmlRegisterInputCallbacks(matchFunc, openFunc, readFunc, closeFunc); |
| xmlRegisterOutputCallbacks(matchFunc, openFunc, writeFunc, closeFunc); |
| libxmlLoaderThread = currentThread(); |
| didInit = true; |
| } |
| |
| xmlParserCtxtPtr parser = xmlCreatePushParserCtxt(handlers, 0, 0, 0, 0); |
| parser->_private = userData; |
| parser->replaceEntities = true; |
| const UChar BOM = 0xFEFF; |
| const unsigned char BOMHighByte = *reinterpret_cast<const unsigned char*>(&BOM); |
| xmlSwitchEncoding(parser, BOMHighByte == 0xFF ? XML_CHAR_ENCODING_UTF16LE : XML_CHAR_ENCODING_UTF16BE); |
| |
| return parser; |
| } |
| |
| |
| // Chunk should be encoded in UTF-8 |
| static xmlParserCtxtPtr createMemoryParser(xmlSAXHandlerPtr handlers, void* userData, const char* chunk) |
| { |
| if (!didInit) { |
| xmlInitParser(); |
| xmlRegisterInputCallbacks(matchFunc, openFunc, readFunc, closeFunc); |
| xmlRegisterOutputCallbacks(matchFunc, openFunc, writeFunc, closeFunc); |
| libxmlLoaderThread = currentThread(); |
| didInit = true; |
| } |
| |
| xmlParserCtxtPtr parser = xmlCreateMemoryParserCtxt(chunk, xmlStrlen((const xmlChar*)chunk)); |
| |
| 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 parser; |
| } |
| |
| // -------------------------------- |
| |
| XMLTokenizer::XMLTokenizer(Document* _doc, FrameView* _view) |
| : m_doc(_doc) |
| , m_view(_view) |
| , m_context(0) |
| , m_pendingCallbacks(new PendingCallbacks) |
| , m_currentNode(_doc) |
| , m_currentNodeIsReferenced(false) |
| , m_sawError(false) |
| , m_sawXSLTransform(false) |
| , m_sawFirstElement(false) |
| , m_isXHTMLDocument(false) |
| , m_parserPaused(false) |
| , m_requestingScript(false) |
| , m_finishCalled(false) |
| , m_errorCount(0) |
| , m_lastErrorLine(0) |
| , m_lastErrorColumn(0) |
| , m_pendingScript(0) |
| , m_scriptStartLine(0) |
| , m_parsingFragment(false) |
| { |
| } |
| |
| XMLTokenizer::XMLTokenizer(DocumentFragment* fragment, Element* parentElement) |
| : m_doc(fragment->document()) |
| , m_view(0) |
| , m_context(0) |
| , m_pendingCallbacks(new PendingCallbacks) |
| , m_currentNode(fragment) |
| , m_currentNodeIsReferenced(fragment) |
| , m_sawError(false) |
| , m_sawXSLTransform(false) |
| , m_sawFirstElement(false) |
| , m_isXHTMLDocument(false) |
| , m_parserPaused(false) |
| , m_requestingScript(false) |
| , m_finishCalled(false) |
| , m_errorCount(0) |
| , m_lastErrorLine(0) |
| , m_lastErrorColumn(0) |
| , m_pendingScript(0) |
| , m_scriptStartLine(0) |
| , m_parsingFragment(true) |
| { |
| if (fragment) |
| fragment->ref(); |
| if (m_doc) |
| m_doc->ref(); |
| |
| // Add namespaces based on the parent node |
| Vector<Element*> elemStack; |
| while (parentElement) { |
| elemStack.append(parentElement); |
| |
| Node* n = parentElement->parentNode(); |
| if (!n || !n->isElementNode()) |
| break; |
| parentElement = static_cast<Element*>(n); |
| } |
| |
| if (elemStack.isEmpty()) |
| return; |
| |
| for (Element* element = elemStack.last(); !elemStack.isEmpty(); elemStack.removeLast()) { |
| if (NamedAttrMap* attrs = element->attributes()) { |
| for (unsigned i = 0; i < attrs->length(); i++) { |
| Attribute* attr = attrs->attributeItem(i); |
| if (attr->localName() == "xmlns") |
| m_defaultNamespaceURI = attr->value(); |
| else if (attr->prefix() == "xmlns") |
| m_prefixToNamespaceMap.set(attr->localName(), attr->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(); |
| } |
| |
| XMLTokenizer::~XMLTokenizer() |
| { |
| setCurrentNode(0); |
| if (m_parsingFragment && m_doc) |
| m_doc->deref(); |
| if (m_pendingScript) |
| m_pendingScript->removeClient(this); |
| if (m_context) |
| xmlFreeParserCtxt(m_context); |
| } |
| |
| void XMLTokenizer::doWrite(const String& parseString) |
| { |
| if (!m_context) |
| initializeParserContext(); |
| |
| // libXML throws an error if you try to switch the encoding for an empty string. |
| if (parseString.length()) { |
| // 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. |
| const UChar BOM = 0xFEFF; |
| const unsigned char BOMHighByte = *reinterpret_cast<const unsigned char*>(&BOM); |
| xmlSwitchEncoding(m_context, BOMHighByte == 0xFF ? XML_CHAR_ENCODING_UTF16LE : XML_CHAR_ENCODING_UTF16BE); |
| |
| xmlParseChunk(m_context, reinterpret_cast<const char*>(parseString.characters()), sizeof(UChar) * parseString.length(), 0); |
| } |
| |
| if (m_doc->decoder() && m_doc->decoder()->sawError()) { |
| // If the decoder saw an error, report it as fatal (stops parsing) |
| handleError(fatal, "Encoding error", lineNumber(), columnNumber()); |
| } |
| |
| return; |
| } |
| |
| static inline String toString(const xmlChar* str, unsigned len) |
| { |
| return UTF8Encoding().decode(reinterpret_cast<const char*>(str), len); |
| } |
| |
| static inline String toString(const xmlChar* str) |
| { |
| if (!str) |
| return String(); |
| |
| return UTF8Encoding().decode(reinterpret_cast<const char*>(str), strlen(reinterpret_cast<const char*>(str))); |
| } |
| |
| struct _xmlSAX2Namespace { |
| const xmlChar* prefix; |
| const xmlChar* uri; |
| }; |
| typedef struct _xmlSAX2Namespace xmlSAX2Namespace; |
| |
| static inline void handleElementNamespaces(Element* newElement, const xmlChar** libxmlNamespaces, int nb_namespaces, ExceptionCode& ec) |
| { |
| xmlSAX2Namespace* namespaces = reinterpret_cast<xmlSAX2Namespace*>(libxmlNamespaces); |
| for(int i = 0; i < nb_namespaces; i++) { |
| String namespaceQName = "xmlns"; |
| String namespaceURI = toString(namespaces[i].uri); |
| if (namespaces[i].prefix) |
| namespaceQName = "xmlns:" + toString(namespaces[i].prefix); |
| newElement->setAttributeNS("http://www.w3.org/2000/xmlns/", namespaceQName, namespaceURI, ec); |
| if (ec) // exception setting attributes |
| return; |
| } |
| } |
| |
| 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(Element* newElement, const xmlChar** libxmlAttributes, int nb_attributes, ExceptionCode& ec) |
| { |
| xmlSAX2Attributes* attributes = reinterpret_cast<xmlSAX2Attributes*>(libxmlAttributes); |
| for(int i = 0; i < nb_attributes; 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 attrURI = attrPrefix.isEmpty() ? String() : toString(attributes[i].uri); |
| String attrQName = attrPrefix.isEmpty() ? attrLocalName : attrPrefix + ":" + attrLocalName; |
| |
| newElement->setAttributeNS(attrURI, attrQName, attrValue, ec); |
| if (ec) // exception setting attributes |
| return; |
| } |
| } |
| |
| void XMLTokenizer::startElementNs(const xmlChar* xmlLocalName, const xmlChar* xmlPrefix, const xmlChar* xmlURI, int nb_namespaces, |
| const xmlChar** libxmlNamespaces, int nb_attributes, int nb_defaulted, const xmlChar** libxmlAttributes) |
| { |
| if (m_parserStopped) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks->appendStartElementNSCallback(xmlLocalName, xmlPrefix, xmlURI, nb_namespaces, libxmlNamespaces, |
| nb_attributes, nb_defaulted, libxmlAttributes); |
| return; |
| } |
| |
| m_sawFirstElement = true; |
| |
| exitText(); |
| |
| String localName = toString(xmlLocalName); |
| String uri = toString(xmlURI); |
| String prefix = toString(xmlPrefix); |
| |
| if (m_parsingFragment && uri.isNull()) { |
| if (!prefix.isNull()) |
| uri = m_prefixToNamespaceMap.get(prefix); |
| else |
| uri = m_defaultNamespaceURI; |
| } |
| |
| ExceptionCode ec = 0; |
| QualifiedName qName(prefix, localName, uri); |
| RefPtr<Element> newElement = m_doc->createElement(qName, true, ec); |
| if (!newElement) { |
| stopParsing(); |
| return; |
| } |
| |
| handleElementNamespaces(newElement.get(), libxmlNamespaces, nb_namespaces, ec); |
| if (ec) { |
| stopParsing(); |
| return; |
| } |
| |
| ScriptController* jsProxy = m_doc->frame() ? m_doc->frame()->script() : 0; |
| if (jsProxy && m_doc->frame()->script()->isEnabled()) |
| jsProxy->setEventHandlerLineno(lineNumber()); |
| |
| handleElementAttributes(newElement.get(), libxmlAttributes, nb_attributes, ec); |
| if (ec) { |
| stopParsing(); |
| return; |
| } |
| |
| if (jsProxy) |
| jsProxy->setEventHandlerLineno(0); |
| |
| newElement->beginParsingChildren(); |
| eventuallyMarkAsParserCreated(newElement.get()); |
| |
| if (isScriptElement(newElement.get())) |
| m_scriptStartLine = lineNumber(); |
| |
| if (!m_currentNode->addChild(newElement.get())) { |
| stopParsing(); |
| return; |
| } |
| |
| setCurrentNode(newElement.get()); |
| if (m_view && !newElement->attached()) |
| newElement->attach(); |
| } |
| |
| void XMLTokenizer::endElementNs() |
| { |
| if (m_parserStopped) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks->appendEndElementNSCallback(); |
| return; |
| } |
| |
| exitText(); |
| |
| Node* n = m_currentNode; |
| RefPtr<Node> parent = n->parentNode(); |
| n->finishParsingChildren(); |
| |
| // don't load external scripts for standalone documents (for now) |
| if (n->isElementNode() && m_view && isScriptElement(static_cast<Element*>(n))) { |
| ASSERT(!m_pendingScript); |
| m_requestingScript = true; |
| |
| Element* element = static_cast<Element*>(n); |
| ScriptElement* scriptElement = castToScriptElement(element); |
| |
| String scriptHref = scriptElement->sourceAttributeValue(); |
| if (!scriptHref.isEmpty()) { |
| // we have a src attribute |
| String scriptCharset = scriptElement->scriptCharset(); |
| if ((m_pendingScript = m_doc->docLoader()->requestScript(scriptHref, scriptCharset))) { |
| m_scriptElement = element; |
| m_pendingScript->addClient(this); |
| |
| // m_pendingScript will be 0 if script was already loaded and ref() executed it |
| if (m_pendingScript) |
| pauseParsing(); |
| } else |
| m_scriptElement = 0; |
| |
| } else { |
| String scriptCode = scriptElement->scriptContent(); |
| m_view->frame()->loader()->executeScript(m_doc->url().string(), m_scriptStartLine, scriptCode); |
| } |
| |
| m_requestingScript = false; |
| } |
| |
| setCurrentNode(parent.get()); |
| } |
| |
| void XMLTokenizer::characters(const xmlChar* s, int len) |
| { |
| if (m_parserStopped) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks->appendCharactersCallback(s, len); |
| return; |
| } |
| |
| if (m_currentNode->isTextNode() || enterText()) |
| m_bufferedText.append(s, len); |
| } |
| |
| void XMLTokenizer::error(ErrorType type, const char* message, va_list args) |
| { |
| if (m_parserStopped) |
| return; |
| |
| #if PLATFORM(WIN_OS) |
| char m[1024]; |
| vsnprintf(m, sizeof(m) - 1, message, args); |
| #else |
| char* m; |
| vasprintf(&m, message, args); |
| #endif |
| |
| if (m_parserPaused) |
| m_pendingCallbacks->appendErrorCallback(type, m, lineNumber(), columnNumber()); |
| else |
| handleError(type, m, lineNumber(), columnNumber()); |
| |
| #if !PLATFORM(WIN_OS) |
| free(m); |
| #endif |
| } |
| |
| void XMLTokenizer::processingInstruction(const xmlChar* target, const xmlChar* data) |
| { |
| if (m_parserStopped) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks->appendProcessingInstructionCallback(target, data); |
| return; |
| } |
| |
| exitText(); |
| |
| // ### handle exceptions |
| int exception = 0; |
| RefPtr<ProcessingInstruction> pi = m_doc->createProcessingInstruction( |
| toString(target), toString(data), exception); |
| if (exception) |
| return; |
| |
| pi->setCreatedByParser(true); |
| |
| if (!m_currentNode->addChild(pi.get())) |
| return; |
| if (m_view && !pi->attached()) |
| pi->attach(); |
| |
| pi->finishParsingChildren(); |
| |
| #if ENABLE(XSLT) |
| m_sawXSLTransform = !m_sawFirstElement && pi->isXSL(); |
| if (m_sawXSLTransform && !m_doc->transformSourceDocument()) |
| stopParsing(); |
| #endif |
| } |
| |
| void XMLTokenizer::cdataBlock(const xmlChar* s, int len) |
| { |
| if (m_parserStopped) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks->appendCDATABlockCallback(s, len); |
| return; |
| } |
| |
| exitText(); |
| |
| RefPtr<Node> newNode = new CDATASection(m_doc, toString(s, len)); |
| if (!m_currentNode->addChild(newNode.get())) |
| return; |
| if (m_view && !newNode->attached()) |
| newNode->attach(); |
| } |
| |
| void XMLTokenizer::comment(const xmlChar* s) |
| { |
| if (m_parserStopped) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks->appendCommentCallback(s); |
| return; |
| } |
| |
| exitText(); |
| |
| RefPtr<Node> newNode = new Comment(m_doc, toString(s)); |
| m_currentNode->addChild(newNode.get()); |
| if (m_view && !newNode->attached()) |
| newNode->attach(); |
| } |
| |
| void XMLTokenizer::startDocument(const xmlChar* version, const xmlChar* encoding, int standalone) |
| { |
| ExceptionCode ec = 0; |
| |
| if (version) |
| m_doc->setXMLVersion(toString(version), ec); |
| m_doc->setXMLStandalone(standalone == 1, ec); // possible values are 0, 1, and -1 |
| if (encoding) |
| m_doc->setXMLEncoding(toString(encoding)); |
| } |
| |
| void XMLTokenizer::endDocument() |
| { |
| exitText(); |
| } |
| |
| void XMLTokenizer::internalSubset(const xmlChar* name, const xmlChar* externalID, const xmlChar* systemID) |
| { |
| if (m_parserStopped) |
| return; |
| |
| if (m_parserPaused) { |
| m_pendingCallbacks->appendInternalSubsetCallback(name, externalID, systemID); |
| return; |
| } |
| |
| if (m_doc) |
| m_doc->addChild(DocumentType::create(m_doc, toString(name), toString(externalID), toString(systemID))); |
| } |
| |
| static inline XMLTokenizer* getTokenizer(void* closure) |
| { |
| xmlParserCtxtPtr ctxt = static_cast<xmlParserCtxtPtr>(closure); |
| return static_cast<XMLTokenizer*>(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. |
| 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 nb_namespaces, const xmlChar** namespaces, int nb_attributes, int nb_defaulted, const xmlChar** libxmlAttributes) |
| { |
| if (hackAroundLibXMLEntityBug(closure)) |
| return; |
| |
| getTokenizer(closure)->startElementNs(localname, prefix, uri, nb_namespaces, namespaces, nb_attributes, nb_defaulted, libxmlAttributes); |
| } |
| |
| static void endElementNsHandler(void* closure, const xmlChar* localname, const xmlChar* prefix, const xmlChar* uri) |
| { |
| if (hackAroundLibXMLEntityBug(closure)) |
| return; |
| |
| getTokenizer(closure)->endElementNs(); |
| } |
| |
| static void charactersHandler(void* closure, const xmlChar* s, int len) |
| { |
| if (hackAroundLibXMLEntityBug(closure)) |
| return; |
| |
| getTokenizer(closure)->characters(s, len); |
| } |
| |
| static void processingInstructionHandler(void* closure, const xmlChar* target, const xmlChar* data) |
| { |
| if (hackAroundLibXMLEntityBug(closure)) |
| return; |
| |
| getTokenizer(closure)->processingInstruction(target, data); |
| } |
| |
| static void cdataBlockHandler(void* closure, const xmlChar* s, int len) |
| { |
| if (hackAroundLibXMLEntityBug(closure)) |
| return; |
| |
| getTokenizer(closure)->cdataBlock(s, len); |
| } |
| |
| static void commentHandler(void* closure, const xmlChar* comment) |
| { |
| if (hackAroundLibXMLEntityBug(closure)) |
| return; |
| |
| getTokenizer(closure)->comment(comment); |
| } |
| |
| WTF_ATTRIBUTE_PRINTF(2, 3) |
| static void warningHandler(void* closure, const char* message, ...) |
| { |
| va_list args; |
| va_start(args, message); |
| getTokenizer(closure)->error(XMLTokenizer::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); |
| getTokenizer(closure)->error(XMLTokenizer::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); |
| getTokenizer(closure)->error(XMLTokenizer::nonFatal, message, args); |
| va_end(args); |
| } |
| |
| // Using a global variable 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[5] = {0,0,0,0,0}; |
| static xmlEntity sharedXHTMLEntity = { |
| 0, XML_ENTITY_DECL, 0, 0, 0, 0, 0, 0, 0, |
| sharedXHTMLEntityResult, sharedXHTMLEntityResult, 0, |
| XML_INTERNAL_PREDEFINED_ENTITY, 0, 0, 0, 0, 0, |
| #if LIBXML_VERSION >= 20627 |
| // xmlEntity gained an extra member in 2.6.27. |
| 1 |
| #endif |
| }; |
| |
| static xmlEntityPtr getXHTMLEntity(const xmlChar* name) |
| { |
| UChar c = decodeNamedEntity(reinterpret_cast<const char*>(name)); |
| if (!c) |
| return 0; |
| |
| CString value = String(&c, 1).utf8(); |
| ASSERT(value.length() < 5); |
| sharedXHTMLEntity.length = value.length(); |
| sharedXHTMLEntity.name = name; |
| memcpy(sharedXHTMLEntityResult, value.data(), sharedXHTMLEntity.length + 1); |
| |
| return &sharedXHTMLEntity; |
| } |
| |
| 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 && getTokenizer(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); |
| getTokenizer(closure)->startDocument(ctxt->version, ctxt->encoding, ctxt->standalone); |
| xmlSAX2StartDocument(closure); |
| } |
| |
| static void endDocumentHandler(void* closure) |
| { |
| getTokenizer(closure)->endDocument(); |
| xmlSAX2EndDocument(closure); |
| } |
| |
| static void internalSubsetHandler(void* closure, const xmlChar* name, const xmlChar* externalID, const xmlChar* systemID) |
| { |
| getTokenizer(closure)->internalSubset(name, externalID, systemID); |
| xmlSAX2InternalSubset(closure, name, externalID, systemID); |
| } |
| |
| static void externalSubsetHandler(void* closure, const xmlChar* name, const xmlChar* externalId, const xmlChar* systemId) |
| { |
| 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")) |
| getTokenizer(closure)->setIsXHTMLDocument(true); // controls if we replace entities or not. |
| } |
| |
| static void ignorableWhitespaceHandler(void* ctx, const xmlChar* ch, int len) |
| { |
| // 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 XMLTokenizer::initializeParserContext(const char* 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; |
| m_parserStopped = false; |
| m_sawError = false; |
| m_sawXSLTransform = false; |
| m_sawFirstElement = false; |
| |
| if (m_parsingFragment) |
| m_context = createMemoryParser(&sax, this, chunk); |
| else |
| m_context = createStringParser(&sax, this); |
| } |
| |
| void XMLTokenizer::doEnd() |
| { |
| #if ENABLE(XSLT) |
| if (m_sawXSLTransform) { |
| m_doc->setTransformSource(xmlDocPtrForString(m_doc->docLoader(), m_originalSourceForTransform, m_doc->url().string())); |
| |
| m_doc->setParsing(false); // Make the doc think it's done, so it will apply xsl sheets. |
| m_doc->updateStyleSelector(); |
| m_doc->setParsing(true); |
| m_parserStopped = true; |
| } |
| #endif |
| |
| if (m_context) { |
| // Tell libxml we're done. |
| xmlParseChunk(m_context, 0, 0, 1); |
| |
| if (m_context->myDoc) |
| xmlFreeDoc(m_context->myDoc); |
| xmlFreeParserCtxt(m_context); |
| m_context = 0; |
| } |
| } |
| |
| #if ENABLE(XSLT) |
| void* xmlDocPtrForString(DocLoader* docLoader, 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. |
| const UChar BOM = 0xFEFF; |
| const unsigned char BOMHighByte = *reinterpret_cast<const unsigned char*>(&BOM); |
| |
| xmlGenericErrorFunc oldErrorFunc = xmlGenericError; |
| void* oldErrorContext = xmlGenericErrorContext; |
| |
| setLoaderForLibXMLCallbacks(docLoader); |
| xmlSetGenericErrorFunc(0, errorFunc); |
| |
| xmlDocPtr sourceDoc = xmlReadMemory(reinterpret_cast<const char*>(source.characters()), |
| source.length() * sizeof(UChar), |
| url.latin1().data(), |
| BOMHighByte == 0xFF ? "UTF-16LE" : "UTF-16BE", |
| XSLT_PARSE_OPTIONS); |
| |
| setLoaderForLibXMLCallbacks(0); |
| xmlSetGenericErrorFunc(oldErrorContext, oldErrorFunc); |
| |
| return sourceDoc; |
| } |
| #endif |
| |
| int XMLTokenizer::lineNumber() const |
| { |
| return m_context ? m_context->input->line : 1; |
| } |
| |
| int XMLTokenizer::columnNumber() const |
| { |
| return m_context ? m_context->input->col : 1; |
| } |
| |
| void XMLTokenizer::stopParsing() |
| { |
| Tokenizer::stopParsing(); |
| xmlStopParser(m_context); |
| } |
| |
| void XMLTokenizer::resumeParsing() |
| { |
| 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; |
| } |
| |
| // Then, write any pending data |
| SegmentedString rest = m_pendingSrc; |
| m_pendingSrc.clear(); |
| write(rest, false); |
| |
| // 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 parseXMLDocumentFragment(const String& chunk, DocumentFragment* fragment, Element* parent) |
| { |
| if (!chunk.length()) |
| return true; |
| |
| XMLTokenizer tokenizer(fragment, parent); |
| |
| tokenizer.initializeParserContext(chunk.utf8().data()); |
| |
| xmlParseContent(tokenizer.m_context); |
| |
| tokenizer.endDocument(); |
| |
| // Check if all the chunk has been processed. |
| long bytesProcessed = xmlByteConsumed(tokenizer.m_context); |
| if (bytesProcessed == -1 || ((unsigned long)bytesProcessed) == sizeof(UChar) * chunk.length()) |
| return false; |
| |
| // No error if the chunk is well formed or it is not but we have no error. |
| return tokenizer.m_context->wellFormed || xmlCtxtGetLastError(tokenizer.m_context) == 0; |
| } |
| |
| // -------------------------------- |
| |
| struct AttributeParseState { |
| HashMap<String, String> attributes; |
| bool gotAttributes; |
| }; |
| |
| static void attributesStartElementNsHandler(void* closure, const xmlChar* xmlLocalName, const xmlChar* xmlPrefix, |
| const xmlChar* xmlURI, int nb_namespaces, const xmlChar** namespaces, |
| int nb_attributes, int nb_defaulted, 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 < nb_attributes; 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; |
| xmlParserCtxtPtr parser = createStringParser(&sax, &state); |
| String parseString = "<?xml version=\"1.0\"?><attrs " + string + " />"; |
| xmlParseChunk(parser, reinterpret_cast<const char*>(parseString.characters()), parseString.length() * sizeof(UChar), 1); |
| if (parser->myDoc) |
| xmlFreeDoc(parser->myDoc); |
| xmlFreeParserCtxt(parser); |
| attrsOK = state.gotAttributes; |
| return state.attributes; |
| } |
| |
| } |
| |
| |
