| /* |
| * 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; |
| |
| import java.io.FilterOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.net.Socket; |
| import java.net.URI; |
| import java.net.URL; |
| import java.net.URLConnection; |
| import java.util.Collections; |
| import java.util.Set; |
| |
| import org.apache.commons.io.IOUtils; |
| import org.apache.commons.io.input.CloseShieldInputStream; |
| import org.xml.sax.Attributes; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.helpers.DefaultHandler; |
| |
| import org.apache.tika.exception.TikaException; |
| import org.apache.tika.io.TemporaryResources; |
| import org.apache.tika.io.TikaInputStream; |
| import org.apache.tika.metadata.Metadata; |
| import org.apache.tika.mime.MediaType; |
| import org.apache.tika.sax.TaggedContentHandler; |
| import org.apache.tika.sax.TeeContentHandler; |
| import org.apache.tika.utils.XMLReaderUtils; |
| |
| |
| public class NetworkParser extends AbstractParser { |
| |
| private final URI uri; |
| |
| private final Set<MediaType> supportedTypes; |
| |
| public NetworkParser(URI uri, Set<MediaType> supportedTypes) { |
| this.uri = uri; |
| this.supportedTypes = supportedTypes; |
| } |
| |
| public NetworkParser(URI uri) { |
| this(uri, Collections.singleton(MediaType.OCTET_STREAM)); |
| } |
| |
| public Set<MediaType> getSupportedTypes(ParseContext context) { |
| return supportedTypes; |
| } |
| |
| public void parse(InputStream stream, ContentHandler handler, Metadata metadata, |
| ParseContext context) throws IOException, SAXException, TikaException { |
| TemporaryResources tmp = new TemporaryResources(); |
| try { |
| TikaInputStream tis = TikaInputStream.get(stream, tmp, metadata); |
| parse(tis, handler, metadata, context); |
| } finally { |
| tmp.dispose(); |
| } |
| } |
| |
| private void parse(TikaInputStream stream, ContentHandler handler, Metadata metadata, |
| ParseContext context) throws IOException, SAXException, TikaException { |
| if ("telnet".equals(uri.getScheme())) { |
| try (Socket socket = new Socket(uri.getHost(), uri.getPort())) { |
| new ParsingTask(stream, new FilterOutputStream(socket.getOutputStream()) { |
| @Override |
| public void close() throws IOException { |
| socket.shutdownOutput(); |
| } |
| }).parse(socket.getInputStream(), handler, metadata, context); |
| } |
| } else { |
| URL url = uri.toURL(); |
| URLConnection connection = url.openConnection(); |
| connection.setDoOutput(true); |
| connection.connect(); |
| try (InputStream input = connection.getInputStream()) { |
| new ParsingTask(stream, connection.getOutputStream()) |
| .parse(new CloseShieldInputStream(input), handler, metadata, context); |
| } |
| } |
| |
| } |
| |
| private static class ParsingTask implements Runnable { |
| |
| private final TikaInputStream input; |
| |
| private final OutputStream output; |
| |
| private volatile Exception exception = null; |
| |
| public ParsingTask(TikaInputStream input, OutputStream output) { |
| this.input = input; |
| this.output = output; |
| } |
| |
| public void parse(InputStream stream, ContentHandler handler, Metadata metadata, |
| ParseContext context) throws IOException, SAXException, TikaException { |
| Thread thread = new Thread(this, "Tika network parser"); |
| thread.start(); |
| |
| TaggedContentHandler tagged = |
| new TaggedContentHandler(handler); |
| try { |
| XMLReaderUtils |
| .parseSAX(stream, new TeeContentHandler(tagged, new MetaHandler(metadata)), |
| context); |
| } catch (SAXException e) { |
| tagged.throwIfCauseOf(e); |
| throw new TikaException("Invalid network parser output", e); |
| } catch (IOException e) { |
| throw new TikaException("Unable to read network parser output", e); |
| } finally { |
| try { |
| thread.join(1000); |
| } catch (InterruptedException e) { |
| throw new TikaException("Network parser interrupted", e); |
| } |
| |
| if (exception != null) { |
| input.throwIfCauseOf(exception); |
| throw new TikaException("Unexpected network parser error", exception); |
| } |
| } |
| } |
| |
| //----------------------------------------------------------<Runnable> |
| |
| public void run() { |
| try { |
| try { |
| IOUtils.copy(input, output); |
| } finally { |
| output.close(); |
| } |
| } catch (Exception e) { |
| exception = e; |
| } |
| } |
| |
| } |
| |
| private static class MetaHandler extends DefaultHandler { |
| |
| private final Metadata metadata; |
| |
| public MetaHandler(Metadata metadata) { |
| this.metadata = metadata; |
| } |
| |
| @Override |
| public void startElement(String uri, String localName, String qName, Attributes attributes) |
| throws SAXException { |
| if ("http://www.w3.org/1999/xhtml".equals(uri) && "meta".equals(localName)) { |
| String name = attributes.getValue("", "name"); |
| String content = attributes.getValue("", "content"); |
| if (name != null && content != null) { |
| metadata.add(name, content); |
| } |
| } |
| } |
| |
| } |
| |
| } |