org.apache.tika.parser.rtf.RTFParser 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.tika.parser.rtf;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.Set;
import org.apache.commons.io.input.TaggedInputStream;
import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.mime.MediaType;
import org.apache.tika.parser.AbstractParser;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* RTF parser
*/
public class RTFParser extends AbstractParser {
/**
* Serial version UID
*/
private static final long serialVersionUID = -4165069489372320313L;
private static final Set SUPPORTED_TYPES =
Collections.singleton(MediaType.application("rtf"));
/**
* maximum number of bytes per embedded object/pict (default: 20MB)
*/
private static int EMB_OBJ_MAX_BYTES = 20 * 1024 * 1024; //20MB
/**
* See {@link #setMaxBytesForEmbeddedObject(int)}.
*
* @return maximum number of bytes allowed for an embedded object.
*/
public static int getMaxBytesForEmbeddedObject() {
return EMB_OBJ_MAX_BYTES;
}
/**
* Bytes for embedded objects are currently cached in memory.
* If something goes wrong during the parsing of an embedded object,
* it is possible that a read length may be crazily too long
* and cause a heap crash.
*
* @param max maximum number of bytes to allow for embedded objects. If
* the embedded object has more than this number of bytes, skip it.
*/
public static void setMaxBytesForEmbeddedObject(int max) {
EMB_OBJ_MAX_BYTES = max;
}
public Set getSupportedTypes(ParseContext context) {
return SUPPORTED_TYPES;
}
public void parse(
InputStream stream, ContentHandler handler,
Metadata metadata, ParseContext context)
throws IOException, SAXException, TikaException {
metadata.set(Metadata.CONTENT_TYPE, "application/rtf");
TaggedInputStream tagged = new TaggedInputStream(stream);
try {
XHTMLContentHandler xhtmlHandler = new XHTMLContentHandler(handler, metadata);
RTFEmbObjHandler embObjHandler = new RTFEmbObjHandler(xhtmlHandler, metadata, context);
final TextExtractor ert = new TextExtractor(xhtmlHandler, metadata, embObjHandler);
ert.extract(stream);
} catch (IOException e) {
tagged.throwIfCauseOf(e);
throw new TikaException("Error parsing an RTF document", e);
}
}
}