484 lines
12 KiB
C++
484 lines
12 KiB
C++
// Copyright (c) 20010 The Chromium Embedded Framework Authors. All rights
|
|
// reserved. Use of this source code is governed by a BSD-style license that
|
|
// can be found in the LICENSE file.
|
|
|
|
#include "xml_reader_impl.h"
|
|
#include "base/logging.h"
|
|
|
|
// Static functions
|
|
|
|
//static
|
|
CefRefPtr<CefXmlReader> CefXmlReader::Create(CefRefPtr<CefStreamReader> stream,
|
|
EncodingType encodingType,
|
|
const CefString& URI)
|
|
{
|
|
CefRefPtr<CefXmlReaderImpl> impl(new CefXmlReaderImpl());
|
|
if (!impl->Initialize(stream, encodingType, URI))
|
|
return NULL;
|
|
return impl.get();
|
|
}
|
|
|
|
|
|
// CefXmlReaderImpl
|
|
|
|
namespace {
|
|
|
|
/**
|
|
* xmlInputReadCallback:
|
|
* @context: an Input context
|
|
* @buffer: the buffer to store data read
|
|
* @len: the length of the buffer in bytes
|
|
*
|
|
* Callback used in the I/O Input API to read the resource
|
|
*
|
|
* Returns the number of bytes read or -1 in case of error
|
|
*/
|
|
int XMLCALL xml_read_callback(void * context, char * buffer, int len)
|
|
{
|
|
CefRefPtr<CefStreamReader> reader(static_cast<CefStreamReader*>(context));
|
|
return reader->Read(buffer, 1, len);
|
|
}
|
|
|
|
/**
|
|
* xmlTextReaderErrorFunc:
|
|
* @arg: the user argument
|
|
* @msg: the message
|
|
* @severity: the severity of the error
|
|
* @locator: a locator indicating where the error occured
|
|
*
|
|
* Signature of an error callback from a reader parser
|
|
*/
|
|
void XMLCALL xml_error_callback(void *arg, const char *msg,
|
|
xmlParserSeverities severity, xmlTextReaderLocatorPtr locator)
|
|
{
|
|
if (!msg)
|
|
return;
|
|
|
|
std::string error_str(msg);
|
|
if (!error_str.empty() && error_str[error_str.length()-1] == '\n')
|
|
error_str.resize(error_str.length()-1);
|
|
|
|
std::stringstream ss;
|
|
ss << error_str << ", line " << xmlTextReaderLocatorLineNumber(locator);
|
|
|
|
LOG(INFO) << ss.str();
|
|
|
|
CefRefPtr<CefXmlReaderImpl> impl(static_cast<CefXmlReaderImpl*>(arg));
|
|
impl->AppendError(ss.str());
|
|
}
|
|
|
|
/**
|
|
* xmlStructuredErrorFunc:
|
|
* @userData: user provided data for the error callback
|
|
* @error: the error being raised.
|
|
*
|
|
* Signature of the function to use when there is an error and
|
|
* the module handles the new error reporting mechanism.
|
|
*/
|
|
void XMLCALL xml_structured_error_callback(void *userData, xmlErrorPtr error)
|
|
{
|
|
if (!error->message)
|
|
return;
|
|
|
|
std::string error_str(error->message);
|
|
if (!error_str.empty() && error_str[error_str.length()-1] == '\n')
|
|
error_str.resize(error_str.length()-1);
|
|
|
|
std::stringstream ss;
|
|
ss << error_str << ", line " << error->line;
|
|
|
|
LOG(INFO) << ss.str();
|
|
|
|
CefRefPtr<CefXmlReaderImpl> impl(static_cast<CefXmlReaderImpl*>(userData));
|
|
impl->AppendError(ss.str());
|
|
}
|
|
|
|
CefString xmlCharToString(const xmlChar* xmlStr, bool free)
|
|
{
|
|
if (!xmlStr)
|
|
return CefString();
|
|
|
|
const char* str = reinterpret_cast<const char*>(xmlStr);
|
|
CefString wstr = std::string(str);
|
|
|
|
if (free)
|
|
xmlFree(const_cast<xmlChar*>(xmlStr));
|
|
|
|
return wstr;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
CefXmlReaderImpl::CefXmlReaderImpl()
|
|
: supported_thread_id_(PlatformThread::CurrentId()), reader_(NULL)
|
|
{
|
|
}
|
|
|
|
CefXmlReaderImpl::~CefXmlReaderImpl()
|
|
{
|
|
if (reader_ != NULL) {
|
|
if (!VerifyContext()) {
|
|
// Close() is supposed to be called directly. We'll try to free the reader
|
|
// now on the wrong thread but there's no guarantee this call won't crash.
|
|
xmlFreeTextReader(reader_);
|
|
} else {
|
|
Close();
|
|
}
|
|
}
|
|
}
|
|
|
|
bool CefXmlReaderImpl::Initialize(CefRefPtr<CefStreamReader> stream,
|
|
EncodingType encodingType,
|
|
const CefString& URI)
|
|
{
|
|
xmlCharEncoding enc = XML_CHAR_ENCODING_NONE;
|
|
switch (encodingType) {
|
|
case XML_ENCODING_UTF8:
|
|
enc = XML_CHAR_ENCODING_UTF8;
|
|
break;
|
|
case XML_ENCODING_UTF16LE:
|
|
enc = XML_CHAR_ENCODING_UTF16LE;
|
|
break;
|
|
case XML_ENCODING_UTF16BE:
|
|
enc = XML_CHAR_ENCODING_UTF16BE;
|
|
break;
|
|
case XML_ENCODING_ASCII:
|
|
enc = XML_CHAR_ENCODING_ASCII;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// Create the input buffer.
|
|
xmlParserInputBufferPtr input_buffer = xmlAllocParserInputBuffer(enc);
|
|
if (!input_buffer)
|
|
return false;
|
|
|
|
input_buffer->context = stream.get();
|
|
input_buffer->readcallback = xml_read_callback;
|
|
|
|
// Create the text reader.
|
|
std::string uriStr = URI;
|
|
reader_ = xmlNewTextReader(input_buffer, uriStr.c_str());
|
|
if (!reader_) {
|
|
// Free the input buffer.
|
|
xmlFreeParserInputBuffer(input_buffer);
|
|
return false;
|
|
}
|
|
|
|
// Keep a reference to the stream.
|
|
stream_ = stream;
|
|
|
|
// Register the error callbacks.
|
|
xmlTextReaderSetErrorHandler(reader_, xml_error_callback, this);
|
|
xmlTextReaderSetStructuredErrorHandler(reader_,
|
|
xml_structured_error_callback, this);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CefXmlReaderImpl::MoveToNextNode()
|
|
{
|
|
if (!VerifyContext())
|
|
return false;
|
|
|
|
return xmlTextReaderRead(reader_) == 1 ? true : false;
|
|
}
|
|
|
|
bool CefXmlReaderImpl::Close()
|
|
{
|
|
if (!VerifyContext())
|
|
return false;
|
|
|
|
// The input buffer will be freed automatically.
|
|
xmlFreeTextReader(reader_);
|
|
reader_ = NULL;
|
|
return true;
|
|
}
|
|
|
|
bool CefXmlReaderImpl::HasError()
|
|
{
|
|
if (!VerifyContext())
|
|
return false;
|
|
|
|
return !error_buf_.str().empty();
|
|
}
|
|
|
|
CefString CefXmlReaderImpl::GetError()
|
|
{
|
|
if (!VerifyContext())
|
|
return CefString();
|
|
|
|
return error_buf_.str();
|
|
}
|
|
|
|
CefXmlReader::NodeType CefXmlReaderImpl::GetType()
|
|
{
|
|
if (!VerifyContext())
|
|
return XML_NODE_UNSUPPORTED;
|
|
|
|
switch (xmlTextReaderNodeType(reader_)) {
|
|
case XML_READER_TYPE_ELEMENT:
|
|
return XML_NODE_ELEMENT_START;
|
|
case XML_READER_TYPE_END_ELEMENT:
|
|
return XML_NODE_ELEMENT_END;
|
|
case XML_READER_TYPE_ATTRIBUTE:
|
|
return XML_NODE_ATTRIBUTE;
|
|
case XML_READER_TYPE_TEXT:
|
|
return XML_NODE_TEXT;
|
|
case XML_READER_TYPE_SIGNIFICANT_WHITESPACE:
|
|
case XML_READER_TYPE_WHITESPACE:
|
|
return XML_NODE_WHITESPACE;
|
|
case XML_READER_TYPE_CDATA:
|
|
return XML_NODE_CDATA;
|
|
case XML_READER_TYPE_ENTITY_REFERENCE:
|
|
return XML_NODE_ENTITY_REFERENCE;
|
|
case XML_READER_TYPE_PROCESSING_INSTRUCTION:
|
|
return XML_NODE_PROCESSING_INSTRUCTION;
|
|
case XML_READER_TYPE_COMMENT:
|
|
return XML_NODE_COMMENT;
|
|
case XML_READER_TYPE_DOCUMENT_TYPE:
|
|
return XML_NODE_DOCUMENT_TYPE;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return XML_NODE_UNSUPPORTED;
|
|
}
|
|
|
|
int CefXmlReaderImpl::GetDepth()
|
|
{
|
|
if (!VerifyContext())
|
|
return -1;
|
|
|
|
return xmlTextReaderDepth(reader_);
|
|
}
|
|
|
|
CefString CefXmlReaderImpl::GetLocalName()
|
|
{
|
|
if (!VerifyContext())
|
|
return CefString();
|
|
|
|
return xmlCharToString(xmlTextReaderConstLocalName(reader_), false);
|
|
}
|
|
|
|
CefString CefXmlReaderImpl::GetPrefix()
|
|
{
|
|
if (!VerifyContext())
|
|
return CefString();
|
|
|
|
return xmlCharToString(xmlTextReaderConstPrefix(reader_), false);
|
|
}
|
|
|
|
CefString CefXmlReaderImpl::GetQualifiedName()
|
|
{
|
|
if (!VerifyContext())
|
|
return CefString();
|
|
|
|
return xmlCharToString(xmlTextReaderConstName(reader_), false);
|
|
}
|
|
|
|
CefString CefXmlReaderImpl::GetNamespaceURI()
|
|
{
|
|
if (!VerifyContext())
|
|
return CefString();
|
|
|
|
return xmlCharToString(xmlTextReaderConstNamespaceUri(reader_), false);
|
|
}
|
|
|
|
CefString CefXmlReaderImpl::GetBaseURI()
|
|
{
|
|
if (!VerifyContext())
|
|
return CefString();
|
|
|
|
return xmlCharToString(xmlTextReaderConstBaseUri(reader_), false);
|
|
}
|
|
|
|
CefString CefXmlReaderImpl::GetXmlLang()
|
|
{
|
|
if (!VerifyContext())
|
|
return CefString();
|
|
|
|
return xmlCharToString(xmlTextReaderConstXmlLang(reader_), false);
|
|
}
|
|
|
|
bool CefXmlReaderImpl::IsEmptyElement()
|
|
{
|
|
if (!VerifyContext())
|
|
return false;
|
|
|
|
return xmlTextReaderIsEmptyElement(reader_) == 1 ? true : false;
|
|
}
|
|
|
|
bool CefXmlReaderImpl::HasValue()
|
|
{
|
|
if (!VerifyContext())
|
|
return false;
|
|
|
|
if (xmlTextReaderNodeType(reader_) == XML_READER_TYPE_ENTITY_REFERENCE) {
|
|
// Provide special handling to return entity reference values.
|
|
return true;
|
|
} else {
|
|
return xmlTextReaderHasValue(reader_) == 1 ? true : false;
|
|
}
|
|
}
|
|
|
|
CefString CefXmlReaderImpl::GetValue()
|
|
{
|
|
if (!VerifyContext())
|
|
return CefString();
|
|
|
|
if (xmlTextReaderNodeType(reader_) == XML_READER_TYPE_ENTITY_REFERENCE) {
|
|
// Provide special handling to return entity reference values.
|
|
xmlNodePtr node = xmlTextReaderCurrentNode(reader_);
|
|
if (node->content != NULL)
|
|
return xmlCharToString(node->content, false);
|
|
return CefString();
|
|
} else {
|
|
return xmlCharToString(xmlTextReaderConstValue(reader_), false);
|
|
}
|
|
}
|
|
|
|
bool CefXmlReaderImpl::HasAttributes()
|
|
{
|
|
if (!VerifyContext())
|
|
return false;
|
|
|
|
return xmlTextReaderHasAttributes(reader_) == 1 ? true : false;
|
|
}
|
|
|
|
size_t CefXmlReaderImpl::GetAttributeCount()
|
|
{
|
|
if (!VerifyContext())
|
|
return 0;
|
|
|
|
return xmlTextReaderAttributeCount(reader_);
|
|
}
|
|
|
|
CefString CefXmlReaderImpl::GetAttribute(int index)
|
|
{
|
|
if (!VerifyContext())
|
|
return CefString();
|
|
|
|
return xmlCharToString(xmlTextReaderGetAttributeNo(reader_, index), true);
|
|
}
|
|
|
|
CefString CefXmlReaderImpl::GetAttribute(const CefString& qualifiedName)
|
|
{
|
|
if (!VerifyContext())
|
|
return CefString();
|
|
|
|
std::string qualifiedNameStr = qualifiedName;
|
|
return xmlCharToString(xmlTextReaderGetAttribute(reader_,
|
|
BAD_CAST qualifiedNameStr.c_str()), true);
|
|
}
|
|
|
|
CefString CefXmlReaderImpl::GetAttribute(const CefString& localName,
|
|
const CefString& namespaceURI)
|
|
{
|
|
if (!VerifyContext())
|
|
return CefString();
|
|
|
|
std::string localNameStr = localName;
|
|
std::string namespaceURIStr = namespaceURI;
|
|
return xmlCharToString(xmlTextReaderGetAttributeNs(reader_,
|
|
BAD_CAST localNameStr.c_str(), BAD_CAST namespaceURIStr.c_str()), true);
|
|
}
|
|
|
|
CefString CefXmlReaderImpl::GetInnerXml()
|
|
{
|
|
if (!VerifyContext())
|
|
return CefString();
|
|
|
|
return xmlCharToString(xmlTextReaderReadInnerXml(reader_), true);
|
|
}
|
|
|
|
CefString CefXmlReaderImpl::GetOuterXml()
|
|
{
|
|
if (!VerifyContext())
|
|
return CefString();
|
|
|
|
return xmlCharToString(xmlTextReaderReadOuterXml(reader_), true);
|
|
}
|
|
|
|
int CefXmlReaderImpl::GetLineNumber()
|
|
{
|
|
if (!VerifyContext())
|
|
return -1;
|
|
|
|
return xmlTextReaderGetParserLineNumber(reader_);
|
|
}
|
|
|
|
bool CefXmlReaderImpl::MoveToAttribute(int index)
|
|
{
|
|
if (!VerifyContext())
|
|
return false;
|
|
|
|
return xmlTextReaderMoveToAttributeNo(reader_, index) == 1 ? true : false;
|
|
}
|
|
|
|
bool CefXmlReaderImpl::MoveToAttribute(const CefString& qualifiedName)
|
|
{
|
|
if (!VerifyContext())
|
|
return false;
|
|
|
|
std::string qualifiedNameStr = qualifiedName;
|
|
return xmlTextReaderMoveToAttribute(reader_,
|
|
BAD_CAST qualifiedNameStr.c_str()) == 1 ? true : false;
|
|
}
|
|
|
|
bool CefXmlReaderImpl::MoveToAttribute(const CefString& localName,
|
|
const CefString& namespaceURI)
|
|
{
|
|
if (!VerifyContext())
|
|
return false;
|
|
|
|
std::string localNameStr = localName;
|
|
std::string namespaceURIStr = namespaceURI;
|
|
return xmlTextReaderMoveToAttributeNs(reader_,
|
|
BAD_CAST localNameStr.c_str(), BAD_CAST namespaceURIStr.c_str()) == 1 ?
|
|
true : false;
|
|
}
|
|
|
|
bool CefXmlReaderImpl::MoveToFirstAttribute()
|
|
{
|
|
if (!VerifyContext())
|
|
return false;
|
|
|
|
return xmlTextReaderMoveToFirstAttribute(reader_) == 1 ? true : false;
|
|
}
|
|
|
|
bool CefXmlReaderImpl::MoveToNextAttribute()
|
|
{
|
|
if (!VerifyContext())
|
|
return false;
|
|
|
|
return xmlTextReaderMoveToNextAttribute(reader_) == 1 ? true : false;
|
|
}
|
|
|
|
bool CefXmlReaderImpl::MoveToCarryingElement()
|
|
{
|
|
if (!VerifyContext())
|
|
return false;
|
|
|
|
return xmlTextReaderMoveToElement(reader_) == 1 ? true : false;
|
|
}
|
|
|
|
void CefXmlReaderImpl::AppendError(const CefString& error_str)
|
|
{
|
|
if (!error_buf_.str().empty())
|
|
error_buf_ << L"\n";
|
|
error_buf_ << error_str;
|
|
}
|
|
|
|
bool CefXmlReaderImpl::VerifyContext()
|
|
{
|
|
if (PlatformThread::CurrentId() != supported_thread_id_) {
|
|
// This object should only be accessed from the thread that created it.
|
|
NOTREACHED();
|
|
return false;
|
|
}
|
|
|
|
return (reader_ != NULL);
|
|
}
|