| /* |
| * 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.txt; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.charset.Charset; |
| import java.util.Collections; |
| import java.util.Set; |
| |
| import org.apache.commons.io.input.CloseShieldInputStream; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.SAXException; |
| |
| import org.apache.tika.detect.AutoDetectReader; |
| import org.apache.tika.detect.EncodingDetector; |
| import org.apache.tika.exception.TikaException; |
| import org.apache.tika.metadata.Metadata; |
| import org.apache.tika.mime.MediaType; |
| import org.apache.tika.parser.AbstractEncodingDetectorParser; |
| import org.apache.tika.parser.ParseContext; |
| import org.apache.tika.sax.XHTMLContentHandler; |
| |
| /** |
| * Plain text parser. The text encoding of the document stream is |
| * automatically detected based on the byte patterns found at the |
| * beginning of the stream and the given document metadata, most |
| * notably the <code>charset</code> parameter of a |
| * {@link org.apache.tika.metadata.HttpHeaders#CONTENT_TYPE} value. |
| * <p/> |
| * This parser sets the following output metadata entries: |
| * <dl> |
| * <dt>{@link org.apache.tika.metadata.HttpHeaders#CONTENT_TYPE}</dt> |
| * <dd><code>text/plain; charset=...</code></dd> |
| * </dl> |
| */ |
| public class TXTParser extends AbstractEncodingDetectorParser { |
| |
| /** |
| * Serial version UID |
| */ |
| private static final long serialVersionUID = -6656102320836888910L; |
| |
| private static final Set<MediaType> SUPPORTED_TYPES = |
| Collections.singleton(MediaType.TEXT_PLAIN); |
| |
| public TXTParser() { |
| super(); |
| } |
| |
| public TXTParser(EncodingDetector encodingDetector) { |
| super(encodingDetector); |
| } |
| |
| public Set<MediaType> getSupportedTypes(ParseContext context) { |
| return SUPPORTED_TYPES; |
| } |
| |
| public void parse(InputStream stream, ContentHandler handler, Metadata metadata, |
| ParseContext context) throws IOException, SAXException, TikaException { |
| |
| // Automatically detect the character encoding |
| try (AutoDetectReader reader = new AutoDetectReader(new CloseShieldInputStream(stream), |
| metadata, getEncodingDetector(context))) { |
| //try to get detected content type; could be a subclass of text/plain |
| //such as vcal, etc. |
| String incomingMime = metadata.get(Metadata.CONTENT_TYPE); |
| MediaType mediaType = MediaType.TEXT_PLAIN; |
| if (incomingMime != null) { |
| MediaType tmpMediaType = MediaType.parse(incomingMime); |
| if (tmpMediaType != null) { |
| mediaType = tmpMediaType; |
| } |
| } |
| Charset charset = reader.getCharset(); |
| MediaType type = new MediaType(mediaType, charset); |
| metadata.set(Metadata.CONTENT_TYPE, type.toString()); |
| // deprecated, see TIKA-431 |
| metadata.set(Metadata.CONTENT_ENCODING, charset.name()); |
| |
| XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata); |
| xhtml.startDocument(); |
| |
| xhtml.startElement("p"); |
| char[] buffer = new char[4096]; |
| int n = reader.read(buffer); |
| while (n != -1) { |
| xhtml.characters(buffer, 0, n); |
| n = reader.read(buffer); |
| } |
| xhtml.endElement("p"); |
| |
| xhtml.endDocument(); |
| } |
| } |
| |
| } |