org.apache.jackrabbit.vault.util.RejectingEntityDefaultHandler Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jackrabbit.vault.util;
import java.io.IOException;
import java.io.StringReader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
* Default handler with special entity resolver that handles all entity resolution requests by returning an empty input
* source. This is to prevent "Arbitrary DTD inclusion in XML parsing".
*/
public class RejectingEntityDefaultHandler extends DefaultHandler {
/**
* default logger
*/
private static final Logger log = LoggerFactory.getLogger(RejectingEntityDefaultHandler.class);
@Override
public InputSource resolveEntity(String publicId, String systemId) throws IOException, SAXException {
log.warn("Rejecting external entity loading with publicId={} systemId={}", publicId, systemId);
return new InputSource(new StringReader(""));
}
}