/*
* 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.tika.sax;
import org.apache.tika.io.ClosedInputStream;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
/**
* Content handler decorator that always returns an empty stream from the
* {@link #resolveEntity(String, String)} method to prevent potential
* network or other external resources from being accessed by an XML parser.
*
* @see <a href="https://issues.apache.org/jira/browse/TIKA-185">TIKA-185</a>
*/
public class OfflineContentHandler extends ContentHandlerDecorator {
public OfflineContentHandler(ContentHandler handler) {
super(handler);
}
/**
* Returns an empty stream. This will make an XML parser silently
* ignore any external entities.
*/
@Override
public InputSource resolveEntity(String publicId, String systemId) {
return new InputSource(new ClosedInputStream());
}
}