| /* |
| * This file is part of the XSL implementation. |
| * |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple, Inc. All rights reserved. |
| * Copyright (C) 2005, 2006 Alexey Proskuryakov <ap@webkit.org> |
| * |
| * 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 "core/xml/XSLTProcessor.h" |
| |
| #include "bindings/core/v8/SourceLocation.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/TransformSource.h" |
| #include "core/editing/serializers/Serialization.h" |
| #include "core/fetch/FetchInitiatorTypeNames.h" |
| #include "core/fetch/RawResource.h" |
| #include "core/fetch/Resource.h" |
| #include "core/fetch/ResourceFetcher.h" |
| #include "core/frame/FrameConsole.h" |
| #include "core/frame/FrameHost.h" |
| #include "core/frame/LocalFrame.h" |
| #include "core/inspector/ConsoleMessage.h" |
| #include "core/xml/XSLStyleSheet.h" |
| #include "core/xml/XSLTExtensions.h" |
| #include "core/xml/XSLTUnicodeSort.h" |
| #include "core/xml/parser/XMLDocumentParser.h" |
| #include "platform/SharedBuffer.h" |
| #include "platform/network/ResourceError.h" |
| #include "platform/network/ResourceRequest.h" |
| #include "platform/network/ResourceResponse.h" |
| #include "platform/weborigin/SecurityOrigin.h" |
| #include "wtf/Assertions.h" |
| #include "wtf/allocator/Partitions.h" |
| #include "wtf/text/CString.h" |
| #include "wtf/text/StringBuffer.h" |
| #include "wtf/text/UTF8.h" |
| #include <libxslt/imports.h> |
| #include <libxslt/security.h> |
| #include <libxslt/variables.h> |
| #include <libxslt/xsltutils.h> |
| |
| namespace blink { |
| |
| void XSLTProcessor::genericErrorFunc(void*, const char*, ...) { |
| // It would be nice to do something with this error message. |
| } |
| |
| void XSLTProcessor::parseErrorFunc(void* userData, xmlError* error) { |
| FrameConsole* console = static_cast<FrameConsole*>(userData); |
| if (!console) |
| return; |
| |
| MessageLevel level; |
| switch (error->level) { |
| case XML_ERR_NONE: |
| level = DebugMessageLevel; |
| break; |
| case XML_ERR_WARNING: |
| level = WarningMessageLevel; |
| break; |
| case XML_ERR_ERROR: |
| case XML_ERR_FATAL: |
| default: |
| level = ErrorMessageLevel; |
| break; |
| } |
| |
| console->addMessage(ConsoleMessage::create( |
| XMLMessageSource, level, error->message, |
| SourceLocation::create(error->file, error->line, 0, nullptr))); |
| } |
| |
| // FIXME: There seems to be no way to control the ctxt pointer for loading here, |
| // thus we have globals. |
| static XSLTProcessor* globalProcessor = nullptr; |
| static ResourceFetcher* globalResourceFetcher = nullptr; |
| |
| static xmlDocPtr docLoaderFunc(const xmlChar* uri, |
| xmlDictPtr, |
| int options, |
| void* ctxt, |
| xsltLoadType type) { |
| if (!globalProcessor) |
| return nullptr; |
| |
| switch (type) { |
| case XSLT_LOAD_DOCUMENT: { |
| xsltTransformContextPtr context = (xsltTransformContextPtr)ctxt; |
| xmlChar* base = xmlNodeGetBase(context->document->doc, context->node); |
| KURL url(KURL(ParsedURLString, reinterpret_cast<const char*>(base)), |
| reinterpret_cast<const char*>(uri)); |
| xmlFree(base); |
| |
| ResourceLoaderOptions fetchOptions( |
| ResourceFetcher::defaultResourceOptions()); |
| FetchRequest request(ResourceRequest(url), FetchInitiatorTypeNames::xml, |
| fetchOptions); |
| request.setOriginRestriction(FetchRequest::RestrictToSameOrigin); |
| Resource* resource = |
| RawResource::fetchSynchronously(request, globalResourceFetcher); |
| if (!resource || !globalProcessor) |
| return nullptr; |
| |
| FrameConsole* console = nullptr; |
| LocalFrame* frame = |
| globalProcessor->xslStylesheet()->ownerDocument()->frame(); |
| if (frame) |
| console = &frame->console(); |
| xmlSetStructuredErrorFunc(console, XSLTProcessor::parseErrorFunc); |
| xmlSetGenericErrorFunc(console, XSLTProcessor::genericErrorFunc); |
| |
| // We don't specify an encoding here. Neither Gecko nor WinIE respects |
| // the encoding specified in the HTTP headers. |
| RefPtr<const SharedBuffer> data = resource->resourceBuffer(); |
| xmlDocPtr doc = data ? xmlReadMemory(data->data(), data->size(), |
| (const char*)uri, 0, options) |
| : nullptr; |
| |
| xmlSetStructuredErrorFunc(0, 0); |
| xmlSetGenericErrorFunc(0, 0); |
| |
| return doc; |
| } |
| case XSLT_LOAD_STYLESHEET: |
| return globalProcessor->xslStylesheet()->locateStylesheetSubResource( |
| ((xsltStylesheetPtr)ctxt)->doc, uri); |
| default: |
| break; |
| } |
| |
| return nullptr; |
| } |
| |
| static inline void setXSLTLoadCallBack(xsltDocLoaderFunc func, |
| XSLTProcessor* processor, |
| ResourceFetcher* fetcher) { |
| xsltSetLoaderFunc(func); |
| globalProcessor = processor; |
| globalResourceFetcher = fetcher; |
| } |
| |
| static int writeToStringBuilder(void* context, const char* buffer, int len) { |
| StringBuilder& resultOutput = *static_cast<StringBuilder*>(context); |
| |
| if (!len) |
| return 0; |
| |
| StringBuffer<UChar> stringBuffer(len); |
| UChar* bufferUChar = stringBuffer.characters(); |
| UChar* bufferUCharEnd = bufferUChar + len; |
| |
| const char* stringCurrent = buffer; |
| WTF::Unicode::ConversionResult result = WTF::Unicode::convertUTF8ToUTF16( |
| &stringCurrent, buffer + len, &bufferUChar, bufferUCharEnd); |
| if (result != WTF::Unicode::conversionOK && |
| result != WTF::Unicode::sourceExhausted) { |
| NOTREACHED(); |
| return -1; |
| } |
| |
| int utf16Length = bufferUChar - stringBuffer.characters(); |
| resultOutput.append(stringBuffer.characters(), utf16Length); |
| return stringCurrent - buffer; |
| } |
| |
| static bool saveResultToString(xmlDocPtr resultDoc, |
| xsltStylesheetPtr sheet, |
| String& resultString) { |
| xmlOutputBufferPtr outputBuf = xmlAllocOutputBuffer(0); |
| if (!outputBuf) |
| return false; |
| |
| StringBuilder resultBuilder; |
| outputBuf->context = &resultBuilder; |
| outputBuf->writecallback = writeToStringBuilder; |
| |
| int retval = xsltSaveResultTo(outputBuf, resultDoc, sheet); |
| xmlOutputBufferClose(outputBuf); |
| if (retval < 0) |
| return false; |
| |
| // Workaround for <http://bugzilla.gnome.org/show_bug.cgi?id=495668>: |
| // libxslt appends an extra line feed to the result. |
| if (resultBuilder.length() > 0 && |
| resultBuilder[resultBuilder.length() - 1] == '\n') |
| resultBuilder.resize(resultBuilder.length() - 1); |
| |
| resultString = resultBuilder.toString(); |
| |
| return true; |
| } |
| |
| static char* allocateParameterArray(const char* data) { |
| size_t length = strlen(data) + 1; |
| char* parameterArray = static_cast<char*>(WTF::Partitions::fastMalloc( |
| length, WTF_HEAP_PROFILER_TYPE_NAME(XSLTProcessor))); |
| memcpy(parameterArray, data, length); |
| return parameterArray; |
| } |
| |
| static const char** xsltParamArrayFromParameterMap( |
| XSLTProcessor::ParameterMap& parameters) { |
| if (parameters.isEmpty()) |
| return nullptr; |
| |
| const char** parameterArray = static_cast<const char**>( |
| WTF::Partitions::fastMalloc(((parameters.size() * 2) + 1) * sizeof(char*), |
| WTF_HEAP_PROFILER_TYPE_NAME(XSLTProcessor))); |
| |
| unsigned index = 0; |
| for (auto& parameter : parameters) { |
| parameterArray[index++] = |
| allocateParameterArray(parameter.key.utf8().data()); |
| parameterArray[index++] = |
| allocateParameterArray(parameter.value.utf8().data()); |
| } |
| parameterArray[index] = 0; |
| |
| return parameterArray; |
| } |
| |
| static void freeXsltParamArray(const char** params) { |
| const char** temp = params; |
| if (!params) |
| return; |
| |
| while (*temp) { |
| WTF::Partitions::fastFree(const_cast<char*>(*(temp++))); |
| WTF::Partitions::fastFree(const_cast<char*>(*(temp++))); |
| } |
| WTF::Partitions::fastFree(params); |
| } |
| |
| static xsltStylesheetPtr xsltStylesheetPointer( |
| Document* document, |
| Member<XSLStyleSheet>& cachedStylesheet, |
| Node* stylesheetRootNode) { |
| if (!cachedStylesheet && stylesheetRootNode) { |
| // When using importStylesheet, we will use the given document as the |
| // imported stylesheet's owner. |
| cachedStylesheet = XSLStyleSheet::createForXSLTProcessor( |
| stylesheetRootNode->parentNode() |
| ? &stylesheetRootNode->parentNode()->document() |
| : document, |
| stylesheetRootNode, stylesheetRootNode->document().url().getString(), |
| stylesheetRootNode->document() |
| .url()); // FIXME: Should we use baseURL here? |
| |
| // According to Mozilla documentation, the node must be a Document node, |
| // an xsl:stylesheet or xsl:transform element. But we just use text |
| // content regardless of node type. |
| cachedStylesheet->parseString(createMarkup(stylesheetRootNode)); |
| } |
| |
| if (!cachedStylesheet || !cachedStylesheet->document()) |
| return nullptr; |
| |
| return cachedStylesheet->compileStyleSheet(); |
| } |
| |
| static inline xmlDocPtr xmlDocPtrFromNode(Node* sourceNode, |
| bool& shouldDelete) { |
| Document* ownerDocument = &sourceNode->document(); |
| bool sourceIsDocument = (sourceNode == ownerDocument); |
| |
| xmlDocPtr sourceDoc = nullptr; |
| if (sourceIsDocument && ownerDocument->transformSource()) |
| sourceDoc = (xmlDocPtr)ownerDocument->transformSource()->platformSource(); |
| if (!sourceDoc) { |
| sourceDoc = (xmlDocPtr)xmlDocPtrForString( |
| ownerDocument, createMarkup(sourceNode), |
| sourceIsDocument ? ownerDocument->url().getString() : String()); |
| shouldDelete = sourceDoc; |
| } |
| return sourceDoc; |
| } |
| |
| static inline String resultMIMEType(xmlDocPtr resultDoc, |
| xsltStylesheetPtr sheet) { |
| // There are three types of output we need to be able to deal with: |
| // HTML (create an HTML document), XML (create an XML document), |
| // and text (wrap in a <pre> and create an XML document). |
| |
| const xmlChar* resultType = nullptr; |
| XSLT_GET_IMPORT_PTR(resultType, sheet, method); |
| if (!resultType && resultDoc->type == XML_HTML_DOCUMENT_NODE) |
| resultType = (const xmlChar*)"html"; |
| |
| if (xmlStrEqual(resultType, (const xmlChar*)"html")) |
| return "text/html"; |
| if (xmlStrEqual(resultType, (const xmlChar*)"text")) |
| return "text/plain"; |
| |
| return "application/xml"; |
| } |
| |
| bool XSLTProcessor::transformToString(Node* sourceNode, |
| String& mimeType, |
| String& resultString, |
| String& resultEncoding) { |
| Document* ownerDocument = &sourceNode->document(); |
| |
| setXSLTLoadCallBack(docLoaderFunc, this, ownerDocument->fetcher()); |
| xsltStylesheetPtr sheet = xsltStylesheetPointer( |
| m_document.get(), m_stylesheet, m_stylesheetRootNode.get()); |
| if (!sheet) { |
| setXSLTLoadCallBack(0, 0, 0); |
| m_stylesheet = nullptr; |
| return false; |
| } |
| m_stylesheet->clearDocuments(); |
| |
| xmlChar* origMethod = sheet->method; |
| if (!origMethod && mimeType == "text/html") |
| sheet->method = (xmlChar*)"html"; |
| |
| bool success = false; |
| bool shouldFreeSourceDoc = false; |
| if (xmlDocPtr sourceDoc = |
| xmlDocPtrFromNode(sourceNode, shouldFreeSourceDoc)) { |
| // The XML declaration would prevent parsing the result as a fragment, |
| // and it's not needed even for documents, as the result of this |
| // function is always immediately parsed. |
| sheet->omitXmlDeclaration = true; |
| |
| xsltTransformContextPtr transformContext = |
| xsltNewTransformContext(sheet, sourceDoc); |
| registerXSLTExtensions(transformContext); |
| |
| xsltSecurityPrefsPtr securityPrefs = xsltNewSecurityPrefs(); |
| // Read permissions are checked by docLoaderFunc. |
| if (0 != xsltSetSecurityPrefs(securityPrefs, XSLT_SECPREF_WRITE_FILE, |
| xsltSecurityForbid)) |
| CRASH(); |
| if (0 != xsltSetSecurityPrefs(securityPrefs, XSLT_SECPREF_CREATE_DIRECTORY, |
| xsltSecurityForbid)) |
| CRASH(); |
| if (0 != xsltSetSecurityPrefs(securityPrefs, XSLT_SECPREF_WRITE_NETWORK, |
| xsltSecurityForbid)) |
| CRASH(); |
| if (0 != xsltSetCtxtSecurityPrefs(securityPrefs, transformContext)) |
| CRASH(); |
| |
| // <http://bugs.webkit.org/show_bug.cgi?id=16077>: XSLT processor |
| // <xsl:sort> algorithm only compares by code point. |
| xsltSetCtxtSortFunc(transformContext, xsltUnicodeSortFunction); |
| |
| // This is a workaround for a bug in libxslt. |
| // The bug has been fixed in version 1.1.13, so once we ship that this |
| // can be removed. |
| if (!transformContext->globalVars) |
| transformContext->globalVars = xmlHashCreate(20); |
| |
| const char** params = xsltParamArrayFromParameterMap(m_parameters); |
| xsltQuoteUserParams(transformContext, params); |
| xmlDocPtr resultDoc = |
| xsltApplyStylesheetUser(sheet, sourceDoc, 0, 0, 0, transformContext); |
| |
| xsltFreeTransformContext(transformContext); |
| xsltFreeSecurityPrefs(securityPrefs); |
| freeXsltParamArray(params); |
| |
| if (shouldFreeSourceDoc) |
| xmlFreeDoc(sourceDoc); |
| |
| success = saveResultToString(resultDoc, sheet, resultString); |
| if (success) { |
| mimeType = resultMIMEType(resultDoc, sheet); |
| resultEncoding = (char*)resultDoc->encoding; |
| } |
| xmlFreeDoc(resultDoc); |
| } |
| |
| sheet->method = origMethod; |
| setXSLTLoadCallBack(0, 0, 0); |
| xsltFreeStylesheet(sheet); |
| m_stylesheet = nullptr; |
| |
| return success; |
| } |
| |
| } // namespace blink |
