private void handleContainerLocation(HttpServletRequest request,
            HttpServletResponse response) throws IOException {
        response.setCharacterEncoding(UTF_8);
        addCorsResponseHeader(request, response);
        try (Writer writer = response.getWriter()) {
            response.setContentType(XML_CONTENT_TYPE);
            XMLStreamWriter xml = xmlOutputFactory.createXMLStreamWriter(
                    writer);
            xml.writeStartDocument();
            // TODO: using us-standard semantics but could emit actual location
            xml.writeStartElement("LocationConstraint");
            xml.writeDefaultNamespace(AWS_XMLNS);
            xml.writeEndElement();
            xml.flush();
        } catch (XMLStreamException xse) {
            throw new IOException(xse);
        }
    }
Map XML ACLs to a canned policy if an exact tranformation exists.
src/main/java/org/gaul/s3proxy/S3ProxyHandler.java