forked from mirrors/gecko-dev
b515c9c804
MozReview-Commit-ID: GF0YXDwfA14 --HG-- extra : rebase_source : fdae0046f882d47fb539a7f882364e5c5caafdcd extra : source : 49249788c0dee331ac2989dc39f0505d965a7bd8
720 lines
20 KiB
C++
720 lines
20 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsSAXXMLReader.h"
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#include "mozilla/Encoding.h"
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#include "nsIInputStream.h"
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#include "nsNetCID.h"
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#include "nsNetUtil.h"
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#include "NullPrincipal.h"
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#include "nsIParser.h"
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#include "nsParserCIID.h"
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#include "nsStreamUtils.h"
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#include "nsStringStream.h"
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#include "nsIScriptError.h"
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#include "nsSAXAttributes.h"
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#include "nsSAXLocator.h"
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#include "nsCharsetSource.h"
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using mozilla::Encoding;
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using mozilla::NotNull;
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#define XMLNS_URI "http://www.w3.org/2000/xmlns/"
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static NS_DEFINE_CID(kParserCID, NS_PARSER_CID);
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NS_IMPL_CYCLE_COLLECTION(nsSAXXMLReader,
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mContentHandler,
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mDTDHandler,
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mErrorHandler,
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mLexicalHandler,
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mDeclarationHandler,
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mBaseURI,
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mListener,
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mParserObserver)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsSAXXMLReader)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsSAXXMLReader)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsSAXXMLReader)
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NS_INTERFACE_MAP_ENTRY(nsISAXXMLReader)
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NS_INTERFACE_MAP_ENTRY(nsIExpatSink)
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NS_INTERFACE_MAP_ENTRY(nsIExtendedExpatSink)
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NS_INTERFACE_MAP_ENTRY(nsIContentSink)
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NS_INTERFACE_MAP_ENTRY(nsIRequestObserver)
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NS_INTERFACE_MAP_ENTRY(nsIStreamListener)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsISAXXMLReader)
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NS_INTERFACE_MAP_END
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nsSAXXMLReader::nsSAXXMLReader() :
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mIsAsyncParse(false),
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mEnableNamespacePrefixes(false)
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{
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}
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// nsIContentSink
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NS_IMETHODIMP
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nsSAXXMLReader::WillBuildModel(nsDTDMode)
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{
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if (mContentHandler)
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return mContentHandler->StartDocument();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::DidBuildModel(bool aTerminated)
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{
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if (mContentHandler)
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return mContentHandler->EndDocument();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::SetParser(nsParserBase *aParser)
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{
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return NS_OK;
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}
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// nsIExtendedExpatSink
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NS_IMETHODIMP
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nsSAXXMLReader::HandleStartElement(const char16_t *aName,
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const char16_t **aAtts,
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uint32_t aAttsCount,
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uint32_t aLineNumber)
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{
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if (!mContentHandler)
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return NS_OK;
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RefPtr<nsSAXAttributes> atts = new nsSAXAttributes();
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if (!atts)
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return NS_ERROR_OUT_OF_MEMORY;
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nsAutoString uri, localName, qName;
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for (; *aAtts; aAtts += 2) {
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SplitExpatName(aAtts[0], uri, localName, qName);
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// XXX don't have attr type information
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NS_NAMED_LITERAL_STRING(cdataType, "CDATA");
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// could support xmlns reporting, it's a standard SAX feature
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if (mEnableNamespacePrefixes || !uri.EqualsLiteral(XMLNS_URI)) {
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NS_ASSERTION(aAtts[1], "null passed to handler");
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atts->AddAttribute(uri, localName, qName, cdataType,
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nsDependentString(aAtts[1]));
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}
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}
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// Deal with the element name
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SplitExpatName(aName, uri, localName, qName);
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return mContentHandler->StartElement(uri, localName, qName, atts);
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}
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NS_IMETHODIMP
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nsSAXXMLReader::HandleEndElement(const char16_t *aName)
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{
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if (mContentHandler) {
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nsAutoString uri, localName, qName;
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SplitExpatName(aName, uri, localName, qName);
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return mContentHandler->EndElement(uri, localName, qName);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::HandleComment(const char16_t *aName)
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{
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NS_ASSERTION(aName, "null passed to handler");
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if (mLexicalHandler)
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return mLexicalHandler->Comment(nsDependentString(aName));
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::HandleCDataSection(const char16_t *aData,
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uint32_t aLength)
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{
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nsresult rv;
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if (mLexicalHandler) {
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rv = mLexicalHandler->StartCDATA();
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NS_ENSURE_SUCCESS(rv, rv);
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}
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if (mContentHandler) {
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rv = mContentHandler->Characters(Substring(aData, aData+aLength));
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NS_ENSURE_SUCCESS(rv, rv);
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}
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if (mLexicalHandler) {
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rv = mLexicalHandler->EndCDATA();
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NS_ENSURE_SUCCESS(rv, rv);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::HandleStartDTD(const char16_t *aName,
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const char16_t *aSystemId,
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const char16_t *aPublicId)
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{
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char16_t nullChar = char16_t(0);
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if (!aName)
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aName = &nullChar;
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if (!aSystemId)
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aSystemId = &nullChar;
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if (!aPublicId)
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aPublicId = &nullChar;
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mSystemId = aSystemId;
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mPublicId = aPublicId;
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if (mLexicalHandler) {
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return mLexicalHandler->StartDTD(nsDependentString(aName),
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nsDependentString(aPublicId),
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nsDependentString(aSystemId));
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::HandleDoctypeDecl(const nsAString & aSubset,
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const nsAString & aName,
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const nsAString & aSystemId,
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const nsAString & aPublicId,
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nsISupports* aCatalogData)
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{
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if (mLexicalHandler)
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return mLexicalHandler->EndDTD();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::HandleCharacterData(const char16_t *aData,
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uint32_t aLength)
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{
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if (mContentHandler)
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return mContentHandler->Characters(Substring(aData, aData+aLength));
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::HandleStartNamespaceDecl(const char16_t *aPrefix,
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const char16_t *aUri)
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{
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if (!mContentHandler)
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return NS_OK;
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char16_t nullChar = char16_t(0);
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if (!aPrefix)
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aPrefix = &nullChar;
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if (!aUri)
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aUri = &nullChar;
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return mContentHandler->StartPrefixMapping(nsDependentString(aPrefix),
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nsDependentString(aUri));
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}
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NS_IMETHODIMP
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nsSAXXMLReader::HandleEndNamespaceDecl(const char16_t *aPrefix)
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{
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if (!mContentHandler)
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return NS_OK;
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if (aPrefix)
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return mContentHandler->EndPrefixMapping(nsDependentString(aPrefix));
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return mContentHandler->EndPrefixMapping(EmptyString());
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}
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NS_IMETHODIMP
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nsSAXXMLReader::HandleProcessingInstruction(const char16_t *aTarget,
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const char16_t *aData)
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{
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NS_ASSERTION(aTarget && aData, "null passed to handler");
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if (mContentHandler) {
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return mContentHandler->ProcessingInstruction(nsDependentString(aTarget),
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nsDependentString(aData));
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::HandleNotationDecl(const char16_t *aNotationName,
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const char16_t *aSystemId,
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const char16_t *aPublicId)
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{
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NS_ASSERTION(aNotationName, "null passed to handler");
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if (mDTDHandler) {
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char16_t nullChar = char16_t(0);
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if (!aSystemId)
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aSystemId = &nullChar;
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if (!aPublicId)
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aPublicId = &nullChar;
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return mDTDHandler->NotationDecl(nsDependentString(aNotationName),
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nsDependentString(aSystemId),
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nsDependentString(aPublicId));
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::HandleUnparsedEntityDecl(const char16_t *aEntityName,
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const char16_t *aSystemId,
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const char16_t *aPublicId,
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const char16_t *aNotationName)
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{
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NS_ASSERTION(aEntityName && aNotationName, "null passed to handler");
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if (mDTDHandler) {
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char16_t nullChar = char16_t(0);
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if (!aSystemId)
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aSystemId = &nullChar;
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if (!aPublicId)
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aPublicId = &nullChar;
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return mDTDHandler->UnparsedEntityDecl(nsDependentString(aEntityName),
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nsDependentString(aSystemId),
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nsDependentString(aPublicId),
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nsDependentString(aNotationName));
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::HandleXMLDeclaration(const char16_t *aVersion,
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const char16_t *aEncoding,
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int32_t aStandalone)
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{
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NS_ASSERTION(aVersion, "null passed to handler");
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if (mDeclarationHandler) {
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char16_t nullChar = char16_t(0);
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if (!aEncoding)
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aEncoding = &nullChar;
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mDeclarationHandler->HandleXMLDeclaration(nsDependentString(aVersion),
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nsDependentString(aEncoding),
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aStandalone > 0);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::ReportError(const char16_t* aErrorText,
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const char16_t* aSourceText,
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nsIScriptError *aError,
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bool *_retval)
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{
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NS_PRECONDITION(aError && aSourceText && aErrorText, "Check arguments!!!");
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// Normally, the expat driver should report the error.
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*_retval = true;
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if (mErrorHandler) {
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uint32_t lineNumber;
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nsresult rv = aError->GetLineNumber(&lineNumber);
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NS_ENSURE_SUCCESS(rv, rv);
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uint32_t columnNumber;
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rv = aError->GetColumnNumber(&columnNumber);
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsISAXLocator> locator = new nsSAXLocator(mPublicId,
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mSystemId,
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lineNumber,
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columnNumber);
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if (!locator)
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return NS_ERROR_OUT_OF_MEMORY;
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rv = mErrorHandler->FatalError(locator, nsDependentString(aErrorText));
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if (NS_SUCCEEDED(rv)) {
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// The error handler has handled the script error. Don't log to console.
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*_retval = false;
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}
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}
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return NS_OK;
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}
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// nsISAXXMLReader
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NS_IMETHODIMP
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nsSAXXMLReader::GetBaseURI(nsIURI **aBaseURI)
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{
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NS_IF_ADDREF(*aBaseURI = mBaseURI);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::SetBaseURI(nsIURI *aBaseURI)
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{
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mBaseURI = aBaseURI;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::GetContentHandler(nsISAXContentHandler **aContentHandler)
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{
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NS_IF_ADDREF(*aContentHandler = mContentHandler);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::SetContentHandler(nsISAXContentHandler *aContentHandler)
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{
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mContentHandler = aContentHandler;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::GetDtdHandler(nsISAXDTDHandler **aDtdHandler)
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{
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NS_IF_ADDREF(*aDtdHandler = mDTDHandler);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::SetDtdHandler(nsISAXDTDHandler *aDtdHandler)
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{
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mDTDHandler = aDtdHandler;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::GetErrorHandler(nsISAXErrorHandler **aErrorHandler)
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{
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NS_IF_ADDREF(*aErrorHandler = mErrorHandler);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::SetErrorHandler(nsISAXErrorHandler *aErrorHandler)
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{
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mErrorHandler = aErrorHandler;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::SetFeature(const nsAString &aName, bool aValue)
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{
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if (aName.EqualsLiteral("http://xml.org/sax/features/namespace-prefixes")) {
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mEnableNamespacePrefixes = aValue;
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return NS_OK;
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}
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::GetFeature(const nsAString &aName, bool *aResult)
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{
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if (aName.EqualsLiteral("http://xml.org/sax/features/namespace-prefixes")) {
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*aResult = mEnableNamespacePrefixes;
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return NS_OK;
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}
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::GetDeclarationHandler(nsIMozSAXXMLDeclarationHandler **aDeclarationHandler) {
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NS_IF_ADDREF(*aDeclarationHandler = mDeclarationHandler);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::SetDeclarationHandler(nsIMozSAXXMLDeclarationHandler *aDeclarationHandler) {
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mDeclarationHandler = aDeclarationHandler;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::GetLexicalHandler(nsISAXLexicalHandler **aLexicalHandler)
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{
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NS_IF_ADDREF(*aLexicalHandler = mLexicalHandler);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::SetLexicalHandler(nsISAXLexicalHandler *aLexicalHandler)
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{
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mLexicalHandler = aLexicalHandler;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::SetProperty(const nsAString &aName, nsISupports* aValue)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::GetProperty(const nsAString &aName, bool *aResult)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsSAXXMLReader::ParseFromString(const nsAString &aStr,
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const char *aContentType)
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{
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// Don't call this in the middle of an async parse
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NS_ENSURE_TRUE(!mIsAsyncParse, NS_ERROR_FAILURE);
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NS_ConvertUTF16toUTF8 data(aStr);
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// The new stream holds a reference to the buffer
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nsCOMPtr<nsIInputStream> stream;
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nsresult rv = NS_NewByteInputStream(getter_AddRefs(stream),
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data.get(), data.Length(),
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NS_ASSIGNMENT_DEPEND);
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NS_ENSURE_SUCCESS(rv, rv);
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return ParseFromStream(stream, "UTF-8", aContentType);
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}
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NS_IMETHODIMP
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nsSAXXMLReader::ParseFromStream(nsIInputStream *aStream,
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const char *aCharset,
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const char *aContentType)
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{
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// Don't call this in the middle of an async parse
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NS_ENSURE_TRUE(!mIsAsyncParse, NS_ERROR_FAILURE);
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NS_ENSURE_ARG(aStream);
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NS_ENSURE_ARG(aContentType);
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// Put the nsCOMPtr out here so we hold a ref to the stream as needed
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nsresult rv;
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nsCOMPtr<nsIInputStream> bufferedStream;
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if (!NS_InputStreamIsBuffered(aStream)) {
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rv = NS_NewBufferedInputStream(getter_AddRefs(bufferedStream),
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aStream, 4096);
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NS_ENSURE_SUCCESS(rv, rv);
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aStream = bufferedStream;
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}
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rv = EnsureBaseURI();
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIPrincipal> nullPrincipal = NullPrincipal::Create();
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// The following channel is never openend, so it does not matter what
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// securityFlags we pass; let's follow the principle of least privilege.
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nsCOMPtr<nsIChannel> parserChannel;
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rv = NS_NewInputStreamChannel(getter_AddRefs(parserChannel),
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mBaseURI,
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aStream,
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nullPrincipal,
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nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_IS_BLOCKED,
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nsIContentPolicy::TYPE_OTHER,
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nsDependentCString(aContentType));
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if (!parserChannel || NS_FAILED(rv))
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return NS_ERROR_FAILURE;
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if (aCharset)
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parserChannel->SetContentCharset(nsDependentCString(aCharset));
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rv = InitParser(nullptr, parserChannel);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mListener->OnStartRequest(parserChannel, nullptr);
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if (NS_FAILED(rv))
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parserChannel->Cancel(rv);
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/* When parsing a new document, we need to clear the XML identifiers.
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HandleStartDTD will set these values from the DTD declaration tag.
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We won't have them, of course, if there's a well-formedness error
|
|
before the DTD tag (such as a space before an XML declaration).
|
|
*/
|
|
mSystemId.Truncate();
|
|
mPublicId.Truncate();
|
|
|
|
nsresult status;
|
|
parserChannel->GetStatus(&status);
|
|
|
|
uint64_t offset = 0;
|
|
while (NS_SUCCEEDED(rv) && NS_SUCCEEDED(status)) {
|
|
uint64_t available;
|
|
rv = aStream->Available(&available);
|
|
if (rv == NS_BASE_STREAM_CLOSED) {
|
|
rv = NS_OK;
|
|
available = 0;
|
|
}
|
|
if (NS_FAILED(rv)) {
|
|
parserChannel->Cancel(rv);
|
|
break;
|
|
}
|
|
if (! available)
|
|
break; // blocking input stream has none available when done
|
|
|
|
if (available > UINT32_MAX)
|
|
available = UINT32_MAX;
|
|
|
|
rv = mListener->OnDataAvailable(parserChannel, nullptr,
|
|
aStream,
|
|
offset,
|
|
(uint32_t)available);
|
|
if (NS_SUCCEEDED(rv))
|
|
offset += available;
|
|
else
|
|
parserChannel->Cancel(rv);
|
|
parserChannel->GetStatus(&status);
|
|
}
|
|
rv = mListener->OnStopRequest(parserChannel, nullptr, status);
|
|
mListener = nullptr;
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsSAXXMLReader::ParseAsync(nsIRequestObserver *aObserver)
|
|
{
|
|
mParserObserver = aObserver;
|
|
mIsAsyncParse = true;
|
|
return NS_OK;
|
|
}
|
|
|
|
// nsIRequestObserver
|
|
|
|
NS_IMETHODIMP
|
|
nsSAXXMLReader::OnStartRequest(nsIRequest *aRequest, nsISupports *aContext)
|
|
{
|
|
NS_ENSURE_TRUE(mIsAsyncParse, NS_ERROR_FAILURE);
|
|
nsresult rv;
|
|
rv = EnsureBaseURI();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest);
|
|
rv = InitParser(mParserObserver, channel);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
// we don't need or want this anymore
|
|
mParserObserver = nullptr;
|
|
return mListener->OnStartRequest(aRequest, aContext);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsSAXXMLReader::OnStopRequest(nsIRequest *aRequest, nsISupports *aContext,
|
|
nsresult status)
|
|
{
|
|
NS_ENSURE_TRUE(mIsAsyncParse, NS_ERROR_FAILURE);
|
|
NS_ENSURE_STATE(mListener);
|
|
nsresult rv = mListener->OnStopRequest(aRequest, aContext, status);
|
|
mListener = nullptr;
|
|
mIsAsyncParse = false;
|
|
return rv;
|
|
}
|
|
|
|
// nsIStreamListener
|
|
|
|
NS_IMETHODIMP
|
|
nsSAXXMLReader::OnDataAvailable(nsIRequest *aRequest, nsISupports *aContext,
|
|
nsIInputStream *aInputStream, uint64_t offset,
|
|
uint32_t count)
|
|
{
|
|
NS_ENSURE_TRUE(mIsAsyncParse, NS_ERROR_FAILURE);
|
|
NS_ENSURE_STATE(mListener);
|
|
return mListener->OnDataAvailable(aRequest, aContext, aInputStream, offset,
|
|
count);
|
|
}
|
|
|
|
nsresult
|
|
nsSAXXMLReader::InitParser(nsIRequestObserver *aObserver, nsIChannel *aChannel)
|
|
{
|
|
nsresult rv;
|
|
|
|
// setup the parser
|
|
nsCOMPtr<nsIParser> parser = do_CreateInstance(kParserCID, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
parser->SetContentSink(this);
|
|
|
|
int32_t charsetSource = kCharsetFromDocTypeDefault;
|
|
auto encoding = UTF_8_ENCODING;
|
|
TryChannelCharset(aChannel, charsetSource, encoding);
|
|
parser->SetDocumentCharset(encoding, charsetSource);
|
|
|
|
rv = parser->Parse(mBaseURI, aObserver);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
mListener = do_QueryInterface(parser, &rv);
|
|
|
|
return rv;
|
|
}
|
|
|
|
// from nsDocument.cpp
|
|
bool
|
|
nsSAXXMLReader::TryChannelCharset(nsIChannel *aChannel,
|
|
int32_t& aCharsetSource,
|
|
NotNull<const Encoding*>& aEncoding)
|
|
{
|
|
if (aCharsetSource >= kCharsetFromChannel)
|
|
return true;
|
|
|
|
if (aChannel) {
|
|
nsAutoCString charsetVal;
|
|
nsresult rv = aChannel->GetContentCharset(charsetVal);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
const Encoding* preferred = Encoding::ForLabel(charsetVal);
|
|
if (!preferred)
|
|
return false;
|
|
|
|
aEncoding = WrapNotNull(preferred);
|
|
aCharsetSource = kCharsetFromChannel;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
nsresult
|
|
nsSAXXMLReader::EnsureBaseURI()
|
|
{
|
|
if (mBaseURI)
|
|
return NS_OK;
|
|
|
|
return NS_NewURI(getter_AddRefs(mBaseURI), "about:blank");
|
|
}
|
|
|
|
nsresult
|
|
nsSAXXMLReader::SplitExpatName(const char16_t *aExpatName,
|
|
nsString &aURI,
|
|
nsString &aLocalName,
|
|
nsString &aQName)
|
|
{
|
|
/**
|
|
* Adapted from RDFContentSinkImpl
|
|
*
|
|
* Expat can send the following:
|
|
* localName
|
|
* namespaceURI<separator>localName
|
|
* namespaceURI<separator>localName<separator>prefix
|
|
*
|
|
* and we use 0xFFFF for the <separator>.
|
|
*
|
|
*/
|
|
|
|
NS_ASSERTION(aExpatName, "null passed to handler");
|
|
nsDependentString expatStr(aExpatName);
|
|
int32_t break1, break2 = kNotFound;
|
|
break1 = expatStr.FindChar(char16_t(0xFFFF));
|
|
|
|
if (break1 == kNotFound) {
|
|
aLocalName = expatStr; // no namespace
|
|
aURI.Truncate();
|
|
aQName = expatStr;
|
|
} else {
|
|
aURI = StringHead(expatStr, break1);
|
|
break2 = expatStr.FindChar(char16_t(0xFFFF), break1 + 1);
|
|
if (break2 == kNotFound) { // namespace, but no prefix
|
|
aLocalName = Substring(expatStr, break1 + 1);
|
|
aQName = aLocalName;
|
|
} else { // namespace with prefix
|
|
aLocalName = Substring(expatStr, break1 + 1, break2 - break1 - 1);
|
|
aQName = Substring(expatStr, break2 + 1) +
|
|
NS_LITERAL_STRING(":") + aLocalName;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|