protected InputStream sanitizeXmlDocument(DefaultHandler handler, InputStream inputStream)
throws S3ServiceException {
if (!properties.getBoolProperty("xmlparser.sanitize-listings", true)) {
// No sanitizing will be performed, return the original input stream unchanged.
return inputStream;
} else {
if (log.isDebugEnabled()) {
log.debug("Sanitizing XML document destined for handler " + handler.getClass());
}
InputStream sanitizedInputStream = null;
try {
/* Read object listing XML document from input stream provided into a
* string buffer, so we can replace troublesome characters before
* sending the document to the XML parser.
*/
StringBuffer listingDocBuffer = new StringBuffer();
BufferedReader br =
new BufferedReader(new InputStreamReader(inputStream, Constants.DEFAULT_ENCODING));
char[] buf = new char[8192];
int read = -1;
while ((read = br.read(buf)) != -1) {
listingDocBuffer.append(buf, 0, read);
}
br.close();
// Replace any carriage return (\r) characters with explicit XML
// character entities, to prevent the SAX parser from
// misinterpreting 0x0D characters as 0x0A.
String listingDoc = listingDocBuffer.toString().replaceAll("\r", "
");
sanitizedInputStream =
new ByteArrayInputStream(listingDoc.getBytes(Constants.DEFAULT_ENCODING));
} catch (Throwable t) {
try {
inputStream.close();
} catch (IOException e) {
if (log.isErrorEnabled()) {
log.error(
"Unable to close response InputStream after failure sanitizing XML document", e);
}
}
throw new S3ServiceException(
"Failed to sanitize XML document destined for handler " + handler.getClass(), t);
}
return sanitizedInputStream;
}
}
/**
* Parses an XML document from an input stream using a document handler.
*
* @param handler the handler for the XML document
* @param inputStream an input stream containing the XML document to parse
* @throws S3ServiceException any parsing, IO or other exceptions are wrapped in an
* S3ServiceException.
*/
protected void parseXmlInputStream(DefaultHandler handler, InputStream inputStream)
throws S3ServiceException {
try {
if (log.isDebugEnabled()) {
log.debug("Parsing XML response document with handler: " + handler.getClass());
}
BufferedReader breader =
new BufferedReader(new InputStreamReader(inputStream, Constants.DEFAULT_ENCODING));
xr.setContentHandler(handler);
xr.setErrorHandler(handler);
xr.parse(new InputSource(breader));
} catch (Throwable t) {
try {
inputStream.close();
} catch (IOException e) {
if (log.isErrorEnabled()) {
log.error("Unable to close response InputStream up after XML parse failure", e);
}
}
throw new S3ServiceException(
"Failed to parse XML document with handler " + handler.getClass(), t);
}
}
