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nsExpatDriver.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsExpatDriver.h"
#include "nsCOMPtr.h"
#include "nsParserCIID.h"
#include "CParserContext.h"
#include "nsIExpatSink.h"
#include "nsIExtendedExpatSink.h"
#include "nsIContentSink.h"
#include "nsParserMsgUtils.h"
#include "nsIURL.h"
#include "nsIUnicharInputStream.h"
#include "nsISimpleUnicharStreamFactory.h"
#include "nsNetUtil.h"
#include "nsNullPrincipal.h"
#include "prprf.h"
#include "prmem.h"
#include "nsTextFormatter.h"
#include "nsDirectoryServiceDefs.h"
#include "nsCRT.h"
#include "nsIConsoleService.h"
#include "nsIScriptError.h"
#include "nsIContentPolicy.h"
#include "nsContentPolicyUtils.h"
#include "nsError.h"
#include "nsXPCOMCIDInternal.h"
#include "nsUnicharInputStream.h"
#define kExpatSeparatorChar 0xFFFF
static const char16_t kUTF16[] = { 'U', 'T', 'F', '-', '1', '6', '\0' };
#ifdef PR_LOGGING
static PRLogModuleInfo *
GetExpatDriverLog()
{
static PRLogModuleInfo *sLog;
if (!sLog)
sLog = PR_NewLogModule("expatdriver");
return sLog;
}
#endif
/***************************** EXPAT CALL BACKS ******************************/
// The callback handlers that get called from the expat parser.
static void
Driver_HandleXMLDeclaration(void *aUserData,
const XML_Char *aVersion,
const XML_Char *aEncoding,
int aStandalone)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
nsExpatDriver* driver = static_cast<nsExpatDriver*>(aUserData);
driver->HandleXMLDeclaration(aVersion, aEncoding, aStandalone);
}
}
static void
Driver_HandleStartElement(void *aUserData,
const XML_Char *aName,
const XML_Char **aAtts)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
static_cast<nsExpatDriver*>(aUserData)->HandleStartElement(aName,
aAtts);
}
}
static void
Driver_HandleEndElement(void *aUserData,
const XML_Char *aName)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
static_cast<nsExpatDriver*>(aUserData)->HandleEndElement(aName);
}
}
static void
Driver_HandleCharacterData(void *aUserData,
const XML_Char *aData,
int aLength)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
nsExpatDriver* driver = static_cast<nsExpatDriver*>(aUserData);
driver->HandleCharacterData(aData, uint32_t(aLength));
}
}
static void
Driver_HandleComment(void *aUserData,
const XML_Char *aName)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if(aUserData) {
static_cast<nsExpatDriver*>(aUserData)->HandleComment(aName);
}
}
static void
Driver_HandleProcessingInstruction(void *aUserData,
const XML_Char *aTarget,
const XML_Char *aData)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
nsExpatDriver* driver = static_cast<nsExpatDriver*>(aUserData);
driver->HandleProcessingInstruction(aTarget, aData);
}
}
static void
Driver_HandleDefault(void *aUserData,
const XML_Char *aData,
int aLength)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
nsExpatDriver* driver = static_cast<nsExpatDriver*>(aUserData);
driver->HandleDefault(aData, uint32_t(aLength));
}
}
static void
Driver_HandleStartCdataSection(void *aUserData)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
static_cast<nsExpatDriver*>(aUserData)->HandleStartCdataSection();
}
}
static void
Driver_HandleEndCdataSection(void *aUserData)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
static_cast<nsExpatDriver*>(aUserData)->HandleEndCdataSection();
}
}
static void
Driver_HandleStartDoctypeDecl(void *aUserData,
const XML_Char *aDoctypeName,
const XML_Char *aSysid,
const XML_Char *aPubid,
int aHasInternalSubset)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
static_cast<nsExpatDriver*>(aUserData)->
HandleStartDoctypeDecl(aDoctypeName, aSysid, aPubid, !!aHasInternalSubset);
}
}
static void
Driver_HandleEndDoctypeDecl(void *aUserData)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
static_cast<nsExpatDriver*>(aUserData)->HandleEndDoctypeDecl();
}
}
static int
Driver_HandleExternalEntityRef(void *aExternalEntityRefHandler,
const XML_Char *aOpenEntityNames,
const XML_Char *aBase,
const XML_Char *aSystemId,
const XML_Char *aPublicId)
{
NS_ASSERTION(aExternalEntityRefHandler, "expat driver should exist");
if (!aExternalEntityRefHandler) {
return 1;
}
nsExpatDriver* driver = static_cast<nsExpatDriver*>
(aExternalEntityRefHandler);
return driver->HandleExternalEntityRef(aOpenEntityNames, aBase, aSystemId,
aPublicId);
}
static void
Driver_HandleStartNamespaceDecl(void *aUserData,
const XML_Char *aPrefix,
const XML_Char *aUri)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
static_cast<nsExpatDriver*>(aUserData)->
HandleStartNamespaceDecl(aPrefix, aUri);
}
}
static void
Driver_HandleEndNamespaceDecl(void *aUserData,
const XML_Char *aPrefix)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
static_cast<nsExpatDriver*>(aUserData)->
HandleEndNamespaceDecl(aPrefix);
}
}
static void
Driver_HandleNotationDecl(void *aUserData,
const XML_Char *aNotationName,
const XML_Char *aBase,
const XML_Char *aSysid,
const XML_Char *aPubid)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
static_cast<nsExpatDriver*>(aUserData)->
HandleNotationDecl(aNotationName, aBase, aSysid, aPubid);
}
}
static void
Driver_HandleUnparsedEntityDecl(void *aUserData,
const XML_Char *aEntityName,
const XML_Char *aBase,
const XML_Char *aSysid,
const XML_Char *aPubid,
const XML_Char *aNotationName)
{
NS_ASSERTION(aUserData, "expat driver should exist");
if (aUserData) {
static_cast<nsExpatDriver*>(aUserData)->
HandleUnparsedEntityDecl(aEntityName, aBase, aSysid, aPubid,
aNotationName);
}
}
/***************************** END CALL BACKS ********************************/
/***************************** CATALOG UTILS *********************************/
// Initially added for bug 113400 to switch from the remote "XHTML 1.0 plus
// MathML 2.0" DTD to the the lightweight customized version that Mozilla uses.
// Since Mozilla is not validating, no need to fetch a *huge* file at each
// click.
// XXX The cleanest solution here would be to fix Bug 98413: Implement XML
// Catalogs.
struct nsCatalogData {
const char* mPublicID;
const char* mLocalDTD;
const char* mAgentSheet;
};
// The order of this table is guestimated to be in the optimum order
static const nsCatalogData kCatalogTable[] = {
{ "-//W3C//DTD XHTML 1.0 Transitional//EN", "htmlmathml-f.ent", nullptr },
{ "-//W3C//DTD XHTML 1.1//EN", "htmlmathml-f.ent", nullptr },
{ "-//W3C//DTD XHTML 1.0 Strict//EN", "htmlmathml-f.ent", nullptr },
{ "-//W3C//DTD XHTML 1.0 Frameset//EN", "htmlmathml-f.ent", nullptr },
{ "-//W3C//DTD XHTML Basic 1.0//EN", "htmlmathml-f.ent", nullptr },
{ "-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN", "htmlmathml-f.ent", nullptr },
{ "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN", "htmlmathml-f.ent", nullptr },
{ "-//W3C//DTD MathML 2.0//EN", "htmlmathml-f.ent", nullptr },
{ "-//WAPFORUM//DTD XHTML Mobile 1.0//EN", "htmlmathml-f.ent", nullptr },
{ nullptr, nullptr, nullptr }
};
static const nsCatalogData*
LookupCatalogData(const char16_t* aPublicID)
{
nsDependentString publicID(aPublicID);
// linear search for now since the number of entries is going to
// be negligible, and the fix for bug 98413 would get rid of this
// code anyway
const nsCatalogData* data = kCatalogTable;
while (data->mPublicID) {
if (publicID.EqualsASCII(data->mPublicID)) {
return data;
}
++data;
}
return nullptr;
}
// This function provides a resource URI to a local DTD
// in resource://gre/res/dtd/ which may or may not exist.
// If aCatalogData is provided, it is used to remap the
// DTD instead of taking the filename from the URI.
static void
GetLocalDTDURI(const nsCatalogData* aCatalogData, nsIURI* aDTD,
nsIURI** aResult)
{
NS_ASSERTION(aDTD, "Null parameter.");
nsAutoCString fileName;
if (aCatalogData) {
// remap the DTD to a known local DTD
fileName.Assign(aCatalogData->mLocalDTD);
}
if (fileName.IsEmpty()) {
// Try to see if the user has installed the DTD file -- we extract the
// filename.ext of the DTD here. Hence, for any DTD for which we have
// no predefined mapping, users just have to copy the DTD file to our
// special DTD directory and it will be picked.
nsCOMPtr<nsIURL> dtdURL = do_QueryInterface(aDTD);
if (!dtdURL) {
return;
}
dtdURL->GetFileName(fileName);
if (fileName.IsEmpty()) {
return;
}
}
nsAutoCString respath("resource://gre/res/dtd/");
respath += fileName;
NS_NewURI(aResult, respath);
}
/***************************** END CATALOG UTILS *****************************/
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsExpatDriver)
NS_INTERFACE_MAP_ENTRY(nsITokenizer)
NS_INTERFACE_MAP_ENTRY(nsIDTD)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDTD)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsExpatDriver)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsExpatDriver)
NS_IMPL_CYCLE_COLLECTION(nsExpatDriver, mSink, mExtendedSink)
nsExpatDriver::nsExpatDriver()
: mExpatParser(nullptr),
mInCData(false),
mInInternalSubset(false),
mInExternalDTD(false),
mMadeFinalCallToExpat(false),
mIsFinalChunk(false),
mInternalState(NS_OK),
mExpatBuffered(0),
mCatalogData(nullptr),
mInnerWindowID(0)
{
}
nsExpatDriver::~nsExpatDriver()
{
if (mExpatParser) {
XML_ParserFree(mExpatParser);
}
}
nsresult
nsExpatDriver::HandleStartElement(const char16_t *aValue,
const char16_t **aAtts)
{
NS_ASSERTION(mSink, "content sink not found!");
// Calculate the total number of elements in aAtts.
// XML_GetSpecifiedAttributeCount will only give us the number of specified
// attrs (twice that number, actually), so we have to check for default attrs
// ourselves.
uint32_t attrArrayLength;
for (attrArrayLength = XML_GetSpecifiedAttributeCount(mExpatParser);
aAtts[attrArrayLength];
attrArrayLength += 2) {
// Just looping till we find out what the length is
}
if (mSink) {
nsresult rv = mSink->
HandleStartElement(aValue, aAtts, attrArrayLength,
XML_GetCurrentLineNumber(mExpatParser));
MaybeStopParser(rv);
}
return NS_OK;
}
nsresult
nsExpatDriver::HandleEndElement(const char16_t *aValue)
{
NS_ASSERTION(mSink, "content sink not found!");
NS_ASSERTION(mInternalState != NS_ERROR_HTMLPARSER_BLOCK,
"Shouldn't block from HandleStartElement.");
if (mSink && mInternalState != NS_ERROR_HTMLPARSER_STOPPARSING) {
nsresult rv = mSink->HandleEndElement(aValue);
MaybeStopParser(rv);
}
return NS_OK;
}
nsresult
nsExpatDriver::HandleCharacterData(const char16_t *aValue,
const uint32_t aLength)
{
NS_ASSERTION(mSink, "content sink not found!");
if (mInCData) {
mCDataText.Append(aValue, aLength);
}
else if (mSink) {
nsresult rv = mSink->HandleCharacterData(aValue, aLength);
MaybeStopParser(rv);
}
return NS_OK;
}
nsresult
nsExpatDriver::HandleComment(const char16_t *aValue)
{
NS_ASSERTION(mSink, "content sink not found!");
if (mInExternalDTD) {
// Ignore comments from external DTDs
return NS_OK;
}
if (mInInternalSubset) {
mInternalSubset.AppendLiteral("<!--");
mInternalSubset.Append(aValue);
mInternalSubset.AppendLiteral("-->");
}
else if (mSink) {
nsresult rv = mSink->HandleComment(aValue);
MaybeStopParser(rv);
}
return NS_OK;
}
nsresult
nsExpatDriver::HandleProcessingInstruction(const char16_t *aTarget,
const char16_t *aData)
{
NS_ASSERTION(mSink, "content sink not found!");
if (mInExternalDTD) {
// Ignore PIs in external DTDs for now. Eventually we want to
// pass them to the sink in a way that doesn't put them in the DOM
return NS_OK;
}
if (mInInternalSubset) {
mInternalSubset.AppendLiteral("<?");
mInternalSubset.Append(aTarget);
mInternalSubset.Append(' ');
mInternalSubset.Append(aData);
mInternalSubset.AppendLiteral("?>");
}
else if (mSink) {
nsresult rv = mSink->HandleProcessingInstruction(aTarget, aData);
MaybeStopParser(rv);
}
return NS_OK;
}
nsresult
nsExpatDriver::HandleXMLDeclaration(const char16_t *aVersion,
const char16_t *aEncoding,
int32_t aStandalone)
{
if (mSink) {
nsresult rv = mSink->HandleXMLDeclaration(aVersion, aEncoding, aStandalone);
MaybeStopParser(rv);
}
return NS_OK;
}
nsresult
nsExpatDriver::HandleDefault(const char16_t *aValue,
const uint32_t aLength)
{
NS_ASSERTION(mSink, "content sink not found!");
if (mInExternalDTD) {
// Ignore newlines in external DTDs
return NS_OK;
}
if (mInInternalSubset) {
mInternalSubset.Append(aValue, aLength);
}
else if (mSink) {
uint32_t i;
nsresult rv = mInternalState;
for (i = 0; i < aLength && NS_SUCCEEDED(rv); ++i) {
if (aValue[i] == '\n' || aValue[i] == '\r') {
rv = mSink->HandleCharacterData(&aValue[i], 1);
}
}
MaybeStopParser(rv);
}
return NS_OK;
}
nsresult
nsExpatDriver::HandleStartCdataSection()
{
mInCData = true;
return NS_OK;
}
nsresult
nsExpatDriver::HandleEndCdataSection()
{
NS_ASSERTION(mSink, "content sink not found!");
mInCData = false;
if (mSink) {
nsresult rv = mSink->HandleCDataSection(mCDataText.get(),
mCDataText.Length());
MaybeStopParser(rv);
}
mCDataText.Truncate();
return NS_OK;
}
nsresult
nsExpatDriver::HandleStartNamespaceDecl(const char16_t* aPrefix,
const char16_t* aUri)
{
if (mExtendedSink) {
nsresult rv = mExtendedSink->HandleStartNamespaceDecl(aPrefix, aUri);
MaybeStopParser(rv);
}
return NS_OK;
}
nsresult
nsExpatDriver::HandleEndNamespaceDecl(const char16_t* aPrefix)
{
if (mExtendedSink && mInternalState != NS_ERROR_HTMLPARSER_STOPPARSING) {
nsresult rv = mExtendedSink->HandleEndNamespaceDecl(aPrefix);
MaybeStopParser(rv);
}
return NS_OK;
}
nsresult
nsExpatDriver::HandleNotationDecl(const char16_t* aNotationName,
const char16_t* aBase,
const char16_t* aSysid,
const char16_t* aPubid)
{
if (mExtendedSink) {
nsresult rv = mExtendedSink->HandleNotationDecl(aNotationName, aSysid,
aPubid);
MaybeStopParser(rv);
}
return NS_OK;
}
nsresult
nsExpatDriver::HandleUnparsedEntityDecl(const char16_t* aEntityName,
const char16_t* aBase,
const char16_t* aSysid,
const char16_t* aPubid,
const char16_t* aNotationName)
{
if (mExtendedSink) {
nsresult rv = mExtendedSink->HandleUnparsedEntityDecl(aEntityName,
aSysid,
aPubid,
aNotationName);
MaybeStopParser(rv);
}
return NS_OK;
}
nsresult
nsExpatDriver::HandleStartDoctypeDecl(const char16_t* aDoctypeName,
const char16_t* aSysid,
const char16_t* aPubid,
bool aHasInternalSubset)
{
mDoctypeName = aDoctypeName;
mSystemID = aSysid;
mPublicID = aPubid;
if (mExtendedSink) {
nsresult rv = mExtendedSink->HandleStartDTD(aDoctypeName, aSysid, aPubid);
MaybeStopParser(rv);
}
if (aHasInternalSubset) {
// Consuming a huge internal subset translates to numerous
// allocations. In an effort to avoid too many allocations
// setting mInternalSubset's capacity to be 1K ( just a guesstimate! ).
mInInternalSubset = true;
mInternalSubset.SetCapacity(1024);
} else {
// Distinguish missing internal subset from an empty one
mInternalSubset.SetIsVoid(true);
}
return NS_OK;
}
nsresult
nsExpatDriver::HandleEndDoctypeDecl()
{
NS_ASSERTION(mSink, "content sink not found!");
mInInternalSubset = false;
if (mSink) {
// let the sink know any additional knowledge that we have about the
// document (currently, from bug 124570, we only expect to pass additional
// agent sheets needed to layout the XML vocabulary of the document)
nsCOMPtr<nsIURI> data;
#if 0
if (mCatalogData && mCatalogData->mAgentSheet) {
NS_NewURI(getter_AddRefs(data), mCatalogData->mAgentSheet);
}
#endif
// The unused support for "catalog style sheets" was removed. It doesn't
// look like we'll ever fix bug 98413 either.
MOZ_ASSERT(!mCatalogData || !mCatalogData->mAgentSheet,
"Need to add back support for catalog style sheets");
// Note: mInternalSubset already doesn't include the [] around it.
nsresult rv = mSink->HandleDoctypeDecl(mInternalSubset, mDoctypeName,
mSystemID, mPublicID, data);
MaybeStopParser(rv);
}
mInternalSubset.SetCapacity(0);
return NS_OK;
}
static NS_METHOD
ExternalDTDStreamReaderFunc(nsIUnicharInputStream* aIn,
void* aClosure,
const char16_t* aFromSegment,
uint32_t aToOffset,
uint32_t aCount,
uint32_t *aWriteCount)
{
// Pass the buffer to expat for parsing.
if (XML_Parse((XML_Parser)aClosure, (const char *)aFromSegment,
aCount * sizeof(char16_t), 0) == XML_STATUS_OK) {
*aWriteCount = aCount;
return NS_OK;
}
*aWriteCount = 0;
return NS_ERROR_FAILURE;
}
int
nsExpatDriver::HandleExternalEntityRef(const char16_t *openEntityNames,
const char16_t *base,
const char16_t *systemId,
const char16_t *publicId)
{
if (mInInternalSubset && !mInExternalDTD && openEntityNames) {
mInternalSubset.Append(char16_t('%'));
mInternalSubset.Append(nsDependentString(openEntityNames));
mInternalSubset.Append(char16_t(';'));
}
// Load the external entity into a buffer.
nsCOMPtr<nsIInputStream> in;
nsAutoString absURL;
nsresult rv = OpenInputStreamFromExternalDTD(publicId, systemId, base,
getter_AddRefs(in), absURL);
if (NS_FAILED(rv)) {
#ifdef DEBUG
nsCString message("Failed to open external DTD: publicId \"");
AppendUTF16toUTF8(publicId, message);
message += "\" systemId \"";
AppendUTF16toUTF8(systemId, message);
message += "\" base \"";
AppendUTF16toUTF8(base, message);
message += "\" URL \"";
AppendUTF16toUTF8(absURL, message);
message += "\"";
NS_WARNING(message.get());
#endif
return 1;
}
nsCOMPtr<nsIUnicharInputStream> uniIn;
rv = nsSimpleUnicharStreamFactory::GetInstance()->
CreateInstanceFromUTF8Stream(in, getter_AddRefs(uniIn));
NS_ENSURE_SUCCESS(rv, 1);
int result = 1;
if (uniIn) {
XML_Parser entParser = XML_ExternalEntityParserCreate(mExpatParser, 0,
kUTF16);
if (entParser) {
XML_SetBase(entParser, absURL.get());
mInExternalDTD = true;
uint32_t totalRead;
do {
rv = uniIn->ReadSegments(ExternalDTDStreamReaderFunc, entParser,
uint32_t(-1), &totalRead);
} while (NS_SUCCEEDED(rv) && totalRead > 0);
result = XML_Parse(entParser, nullptr, 0, 1);
mInExternalDTD = false;
XML_ParserFree(entParser);
}
}
return result;
}
nsresult
nsExpatDriver::OpenInputStreamFromExternalDTD(const char16_t* aFPIStr,
const char16_t* aURLStr,
const char16_t* aBaseURL,
nsIInputStream** aStream,
nsAString& aAbsURL)
{
nsCOMPtr<nsIURI> baseURI;
nsresult rv = NS_NewURI(getter_AddRefs(baseURI),
NS_ConvertUTF16toUTF8(aBaseURL));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURI> uri;
rv = NS_NewURI(getter_AddRefs(uri), NS_ConvertUTF16toUTF8(aURLStr), nullptr,
baseURI);
NS_ENSURE_SUCCESS(rv, rv);
// check if it is alright to load this uri
bool isChrome = false;
uri->SchemeIs("chrome", &isChrome);
if (!isChrome) {
// since the url is not a chrome url, check to see if we can map the DTD
// to a known local DTD, or if a DTD file of the same name exists in the
// special DTD directory
if (aFPIStr) {
// see if the Formal Public Identifier (FPI) maps to a catalog entry
mCatalogData = LookupCatalogData(aFPIStr);
}
nsCOMPtr<nsIURI> localURI;
GetLocalDTDURI(mCatalogData, uri, getter_AddRefs(localURI));
if (!localURI) {
return NS_ERROR_NOT_IMPLEMENTED;
}
localURI.swap(uri);
}
nsCOMPtr<nsIDocument> doc;
NS_ASSERTION(mSink == nsCOMPtr<nsIExpatSink>(do_QueryInterface(mOriginalSink)),
"In nsExpatDriver::OpenInputStreamFromExternalDTD: "
"mOriginalSink not the same object as mSink?");
if (mOriginalSink)
doc = do_QueryInterface(mOriginalSink->GetTarget());
int16_t shouldLoad = nsIContentPolicy::ACCEPT;
rv = NS_CheckContentLoadPolicy(nsIContentPolicy::TYPE_DTD,
uri,
(doc ? doc->NodePrincipal() : nullptr),
doc,
EmptyCString(), //mime guess
nullptr, //extra
&shouldLoad);
if (NS_FAILED(rv)) return rv;
if (NS_CP_REJECTED(shouldLoad)) {
// Disallowed by content policy
return NS_ERROR_CONTENT_BLOCKED;
}
nsAutoCString absURL;
uri->GetSpec(absURL);
CopyUTF8toUTF16(absURL, aAbsURL);
nsCOMPtr<nsIChannel> channel;
if (doc) {
rv = NS_NewChannel(getter_AddRefs(channel),
uri,
doc,
nsILoadInfo::SEC_NORMAL,
nsIContentPolicy::TYPE_DTD);
}
else {
nsCOMPtr<nsIPrincipal> nullPrincipal =
do_CreateInstance("@mozilla.org/nullprincipal;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = NS_NewChannel(getter_AddRefs(channel),
uri,
nullPrincipal,
nsILoadInfo::SEC_NORMAL,
nsIContentPolicy::TYPE_DTD);
}
NS_ENSURE_SUCCESS(rv, rv);
channel->SetContentType(NS_LITERAL_CSTRING("application/xml"));
return channel->Open(aStream);
}
static nsresult
CreateErrorText(const char16_t* aDescription,
const char16_t* aSourceURL,
const uint32_t aLineNumber,
const uint32_t aColNumber,
nsString& aErrorString)
{
aErrorString.Truncate();
nsAutoString msg;
nsresult rv =
nsParserMsgUtils::GetLocalizedStringByName(XMLPARSER_PROPERTIES,
"XMLParsingError", msg);
NS_ENSURE_SUCCESS(rv, rv);
// XML Parsing Error: %1$S\nLocation: %2$S\nLine Number %3$u, Column %4$u:
char16_t *message = nsTextFormatter::smprintf(msg.get(), aDescription,
aSourceURL, aLineNumber,
aColNumber);
if (!message) {
return NS_ERROR_OUT_OF_MEMORY;
}
aErrorString.Assign(message);
nsTextFormatter::smprintf_free(message);
return NS_OK;
}
static nsresult
AppendErrorPointer(const int32_t aColNumber,
const char16_t *aSourceLine,
nsString& aSourceString)
{
aSourceString.Append(char16_t('\n'));
// Last character will be '^'.
int32_t last = aColNumber - 1;
int32_t i;
uint32_t minuses = 0;
for (i = 0; i < last; ++i) {
if (aSourceLine[i] == '\t') {
// Since this uses |white-space: pre;| a tab stop equals 8 spaces.
uint32_t add = 8 - (minuses % 8);
aSourceString.AppendASCII("--------", add);
minuses += add;
}
else {
aSourceString.Append(char16_t('-'));
++minuses;
}
}
aSourceString.Append(char16_t('^'));
return NS_OK;
}
nsresult
nsExpatDriver::HandleError()
{
int32_t code = XML_GetErrorCode(mExpatParser);
NS_ASSERTION(code > XML_ERROR_NONE, "unexpected XML error code");
// Map Expat error code to an error string
// XXX Deal with error returns.
nsAutoString description;
nsParserMsgUtils::GetLocalizedStringByID(XMLPARSER_PROPERTIES, code,
description);
if (code == XML_ERROR_TAG_MISMATCH) {
/**
* Expat can send the following:
* localName
* namespaceURI<separator>localName
* namespaceURI<separator>localName<separator>prefix
*
* and we use 0xFFFF for the <separator>.
*
*/
const char16_t *mismatch = MOZ_XML_GetMismatchedTag(mExpatParser);
const char16_t *uriEnd = nullptr;
const char16_t *nameEnd = nullptr;
const char16_t *pos;
for (pos = mismatch; *pos; ++pos) {
if (*pos == kExpatSeparatorChar) {
if (uriEnd) {
nameEnd = pos;
}
else {
uriEnd = pos;
}
}
}
nsAutoString tagName;
if (uriEnd && nameEnd) {
// We have a prefix.
tagName.Append(nameEnd + 1, pos - nameEnd - 1);
tagName.Append(char16_t(':'));
}
const char16_t *nameStart = uriEnd ? uriEnd + 1 : mismatch;
tagName.Append(nameStart, (nameEnd ? nameEnd : pos) - nameStart);
nsAutoString msg;
nsParserMsgUtils::GetLocalizedStringByName(XMLPARSER_PROPERTIES,
"Expected", msg);
// . Expected: </%S>.
char16_t *message = nsTextFormatter::smprintf(msg.get(), tagName.get());
if (!message) {
return NS_ERROR_OUT_OF_MEMORY;
}
description.Append(message);
nsTextFormatter::smprintf_free(message);
}
// Adjust the column number so that it is one based rather than zero based.
uint32_t colNumber = XML_GetCurrentColumnNumber(mExpatParser) + 1;
uint32_t lineNumber = XML_GetCurrentLineNumber(mExpatParser);
nsAutoString errorText;
CreateErrorText(description.get(), XML_GetBase(mExpatParser), lineNumber,
colNumber, errorText);
NS_ASSERTION(mSink, "no sink?");
nsAutoString sourceText(mLastLine);
AppendErrorPointer(colNumber, mLastLine.get(), sourceText);
// Try to create and initialize the script error.
nsCOMPtr<nsIScriptError> serr(do_CreateInstance(NS_SCRIPTERROR_CONTRACTID));
nsresult rv = NS_ERROR_FAILURE;
if (serr) {
rv = serr->InitWithWindowID(description,
mURISpec,
mLastLine,
lineNumber, colNumber,
nsIScriptError::errorFlag, "malformed-xml",
mInnerWindowID);
}
// If it didn't initialize, we can't do any logging.
bool shouldReportError = NS_SUCCEEDED(rv);
if (mSink && shouldReportError) {
rv = mSink->ReportError(errorText.get(),
sourceText.get(),
serr,
&shouldReportError);
if (NS_FAILED(rv)) {
shouldReportError = true;
}
}
if (shouldReportError) {
nsCOMPtr<nsIConsoleService> cs
(do_GetService(NS_CONSOLESERVICE_CONTRACTID));
if (cs) {
cs->LogMessage(serr);
}
}
return NS_ERROR_HTMLPARSER_STOPPARSING;
}
void
nsExpatDriver::ParseBuffer(const char16_t *aBuffer,
uint32_t aLength,
bool aIsFinal,
uint32_t *aConsumed)
{
NS_ASSERTION((aBuffer && aLength != 0) || (!aBuffer && aLength == 0), "?");
NS_ASSERTION(mInternalState != NS_OK || aIsFinal || aBuffer,