/// <summary>
/// Parses XML from a byte buffer,
/// fixing the encoding (Latin-1 to UTF-8) and illegal control character optionally.
/// </summary>
/// <param name="buffer">a byte buffer containing the XMP packet</param>
/// <param name="options">the parsing options</param>
/// <returns>Returns an XML DOM-Document.</returns>
/// <exception cref="iText.Kernel.XMP.XMPException">Thrown when the parsing fails.
/// </exception>
private static XmlDocument ParseXmlFromBytebuffer(ByteBuffer buffer, ParseOptions options)
{
try {
XmlDocument doc = new XmlDocument();
doc.Load(GetSecureXmlReader(buffer.GetByteStream()));
return(doc);
} catch (XmlException e) {
XmlDocument doc = new XmlDocument();
if (options.GetAcceptLatin1())
{
buffer = Latin1Converter.Convert(buffer);
}
if (options.GetFixControlChars())
{
try {
StreamReader streamReader = new StreamReader(buffer.GetByteStream(), Encoding.GetEncoding(buffer.GetEncoding()));
FixASCIIControlsReader fixReader = new FixASCIIControlsReader(streamReader);
doc.Load(GetSecureXmlReader(fixReader));
return(doc);
} catch (Exception) {
// can normally not happen as the encoding is provided by a util function
throw new XMPException("Unsupported Encoding", XMPError.INTERNALFAILURE, e);
}
}
doc.Load(buffer.GetByteStream());
return(doc);
}
}
/// <summary>
/// Parses XML from an <seealso cref="Stream"/>,
/// fixing the encoding (Latin-1 to UTF-8) and illegal control character optionally.
/// </summary>
/// <param name="stream"> an <code>InputStream</code> </param>
/// <param name="options"> the parsing options </param>
/// <returns> Returns an XML DOM-Document. </returns>
/// <exception cref="XMPException"> Thrown when the parsing fails. </exception>
private static XmlDocument ParseXmlFromInputStream(Stream stream, ParseOptions options)
{
if (!options.GetAcceptLatin1() && !options.GetFixControlChars())
{
XmlDocument doc = new XmlDocument();
doc.Load(GetSecureXmlReader(stream));
return(doc);
}
// load stream into bytebuffer
try {
ByteBuffer buffer = new ByteBuffer(stream);
return(ParseXmlFromBytebuffer(buffer, options));
}
catch (IOException e) {
throw new XMPException("Error reading the XML-file", XMPError.BADSTREAM, e);
}
}
/// <summary>
/// Parses XML from an
/// <see cref="InputStream"/>
/// ,
/// fixing the encoding (Latin-1 to UTF-8) and illegal control character optionally.
/// </summary>
/// <param name="stream">an <code>InputStream</code></param>
/// <param name="options">the parsing options</param>
/// <returns>Returns an XML DOM-Document.</returns>
/// <exception cref="Com.Adobe.Xmp.XMPException">Thrown when the parsing fails.</exception>
private static XmlDocument ParseXmlFromInputStream(InputStream stream, ParseOptions options)
{
if (!options.GetAcceptLatin1() && !options.GetFixControlChars())
{
return(ParseInputSource(new InputSource(stream)));
}
else
{
// load stream into bytebuffer
try
{
ByteBuffer buffer = new ByteBuffer(stream);
return(ParseXmlFromBytebuffer(buffer, options));
}
catch (IOException e)
{
throw new XMPException("Error reading the XML-file", XMPErrorConstants.Badstream, e);
}
}
}
/// <summary>
/// Parses XML from a byte buffer,
/// fixing the encoding (Latin-1 to UTF-8) and illegal control character optionally.
/// </summary>
/// <param name="buffer">a byte buffer containing the XMP packet</param>
/// <param name="options">the parsing options</param>
/// <returns>Returns an XML DOM-Document.</returns>
/// <exception cref="Com.Adobe.Xmp.XMPException">Thrown when the parsing fails.</exception>
private static XmlDocument ParseXmlFromBytebuffer(ByteBuffer buffer, ParseOptions options)
{
InputSource source = new InputSource(buffer.GetByteStream());
try
{
return(ParseInputSource(source));
}
catch (XMPException e)
{
if (e.GetErrorCode() == XMPErrorConstants.Badxml || e.GetErrorCode() == XMPErrorConstants.Badstream)
{
if (options.GetAcceptLatin1())
{
buffer = Latin1Converter.Convert(buffer);
}
if (options.GetFixControlChars())
{
try
{
string encoding = buffer.GetEncoding();
System.IO.StreamReader fixReader = new FixASCIIControlsReader(new InputStreamReader(buffer.GetByteStream(), encoding));
return(ParseInputSource(new InputSource(fixReader)));
}
catch (UnsupportedEncodingException)
{
// can normally not happen as the encoding is provided by a util function
throw new XMPException("Unsupported Encoding", XMPErrorConstants.Internalfailure, e);
}
}
source = new InputSource(buffer.GetByteStream());
return(ParseInputSource(source));
}
else
{
throw;
}
}
}