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https://github.com/yacy/yacy_search_server.git
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b6fb239e74
some file types are containers for several files. These containers had been parsed in such a way that the set of resulting parsed content was merged into one single document before parsing. Using this parser infrastructure it is not possible to parse document containers that contain individual files. An example is a rss file where the rss messages can be treated as individual documents with their own url reference. Another example is a surrogate file which was treated with a special operation outside of the parser infrastructure. This commit introduces a redesigned parser interface and a new abstract parser implementation. The new parser interface has now only one entry point and returns always a set of parsed documents. In case of single documents the parser method returns a set of one documents. To be compliant with the new interface, the zip and tar parser had been also completely redesigned. All parsers are now much more simple and cleaner in its structure. The switchboard operations had been extended to operate with sets of parsed files, not single parsed files. additionally, parsing of jar manifest files had been added. git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6955 6c8d7289-2bf4-0310-a012-ef5d649a1542
295 lines
12 KiB
Java
295 lines
12 KiB
Java
// genericImageParser.java
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// (C) 2009 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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// first published 16.10.2009 on http://yacy.net
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//
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// This is a part of YaCy, a peer-to-peer based web search engine
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//
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// $LastChangedDate: 2009-10-11 02:12:19 +0200 (So, 11 Okt 2009) $
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// $LastChangedRevision: 6398 $
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// $LastChangedBy: orbiter $
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//
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// LICENSE
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package net.yacy.document.parser.images;
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import java.awt.image.BufferedImage;
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import java.io.EOFException;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;import java.net.MalformedURLException;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.Set;
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import javax.imageio.ImageIO;
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import com.drew.imaging.jpeg.JpegMetadataReader;
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import com.drew.metadata.Directory;
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import com.drew.metadata.Metadata;
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import com.drew.metadata.MetadataException;
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import com.drew.metadata.Tag;
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import com.sun.image.codec.jpeg.ImageFormatException;
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import com.sun.image.codec.jpeg.JPEGCodec;
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import com.sun.image.codec.jpeg.JPEGDecodeParam;
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import com.sun.image.codec.jpeg.JPEGImageDecoder;
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import net.yacy.cora.document.MultiProtocolURI;
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import net.yacy.document.AbstractParser;
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import net.yacy.document.Document;
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import net.yacy.document.Parser;
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import net.yacy.document.parser.html.ImageEntry;
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import net.yacy.document.parser.images.bmpParser.IMAGEMAP;
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import net.yacy.kelondro.logging.Log;
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import net.yacy.kelondro.util.FileUtils;
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public class genericImageParser extends AbstractParser implements Parser {
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/**
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* a list of mime types that are supported by this parser class
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* @see #getSupportedMimeTypes()
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*/
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public static final Set<String> SUPPORTED_MIME_TYPES = new HashSet<String>();
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public static final Set<String> SUPPORTED_EXTENSIONS = new HashSet<String>();
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static {
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SUPPORTED_EXTENSIONS.add("png");
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SUPPORTED_EXTENSIONS.add("gif");
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SUPPORTED_EXTENSIONS.add("jpg");
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SUPPORTED_EXTENSIONS.add("jpeg");
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SUPPORTED_EXTENSIONS.add("jpe");
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SUPPORTED_EXTENSIONS.add("bmp");
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SUPPORTED_MIME_TYPES.add("image/png");
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SUPPORTED_MIME_TYPES.add("image/gif");
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SUPPORTED_MIME_TYPES.add("image/jpg");
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SUPPORTED_MIME_TYPES.add("image/bmp");
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}
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public genericImageParser() {
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super("Generic Image Parser");
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}
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public Document[] parse(
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final MultiProtocolURI location,
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final String mimeType,
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final String documentCharset,
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final InputStream sourceStream) throws Parser.Failure, InterruptedException {
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ImageInfo ii = null;
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String title = null;
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String author = null;
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String keywords = null;
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String description = null;
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if (mimeType.equals("image/bmp") ||
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location.getFileExtension().equals("bmp")) {
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byte[] b;
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try {
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b = FileUtils.read(sourceStream);
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} catch (IOException e) {
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Log.logException(e);
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throw new Parser.Failure(e.getMessage(), location);
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}
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IMAGEMAP imap = bmpParser.parse(b);
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ii = parseJavaImage(location, imap.getImage());
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} else if (mimeType.equals("image/jpg") ||
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location.getFileExtension().equals("jpg") ||
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location.getFileExtension().equals("jpeg") ||
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location.getFileExtension().equals("jpe")) {
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// use the exif parser from
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// http://www.drewnoakes.com/drewnoakes.com/code/exif/
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// javadoc is at: http://www.drewnoakes.com/drewnoakes.com/code/exif/javadoc/
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// a tutorial is at: http://www.drewnoakes.com/drewnoakes.com/code/exif/sampleUsage.html
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JPEGImageDecoder jpegDecoder = JPEGCodec.createJPEGDecoder(sourceStream);
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BufferedImage image = null;
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try {
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image = jpegDecoder.decodeAsBufferedImage();
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} catch (ImageFormatException e) {
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throw new Parser.Failure(e.getMessage(), location);
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} catch (IOException e) {
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throw new Parser.Failure(e.getMessage(), location);
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}
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JPEGDecodeParam decodeParam = jpegDecoder.getJPEGDecodeParam();
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Metadata metadata = JpegMetadataReader.readMetadata(decodeParam);
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ii = parseJavaImage(location, image);
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@SuppressWarnings("unchecked")
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Iterator<Directory> directories = metadata.getDirectoryIterator();
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HashMap<String, String> props = new HashMap<String, String>();
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while (directories.hasNext()) {
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Directory directory = directories.next();
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@SuppressWarnings("unchecked")
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Iterator<Tag> tags = directory.getTagIterator();
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while (tags.hasNext()) {
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Tag tag = tags.next();
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try {
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props.put(tag.getTagName(), tag.getDescription());
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ii.info.append(tag.getTagName() + ": " + tag.getDescription() + " .\n");
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} catch (MetadataException e) {
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Log.logException(e);
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}
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}
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title = props.get("Image Description");
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if (title == null || title.length() == 0) title = props.get("Headline");
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if (title == null || title.length() == 0) title = props.get("Object Name");
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author = props.get("Artist");
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if (author == null || author.length() == 0) author = props.get("Writer/Editor");
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if (author == null || author.length() == 0) author = props.get("By-line");
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if (author == null || author.length() == 0) author = props.get("Credit");
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if (author == null || author.length() == 0) author = props.get("Make");
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keywords = props.get("Keywords");
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if (keywords == null || keywords.length() == 0) keywords = props.get("Category");
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if (keywords == null || keywords.length() == 0) keywords = props.get("Supplemental Category(s)");
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description = props.get("Caption/Abstract");
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if (description == null || description.length() == 0) description = props.get("Country/Primary Location");
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if (description == null || description.length() == 0) description = props.get("Province/State");
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if (description == null || description.length() == 0) description = props.get("Copyright Notice");
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}
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} else {
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ii = parseJavaImage(location, sourceStream);
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}
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final HashSet<String> languages = new HashSet<String>();
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final HashMap<MultiProtocolURI, String> anchors = new HashMap<MultiProtocolURI, String>();
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final HashMap<MultiProtocolURI, ImageEntry> images = new HashMap<MultiProtocolURI, ImageEntry>();
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// add this image to the map of images
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String infoString = ii.info.toString();
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images.put(ii.location, new ImageEntry(location, "", ii.width, ii.height, -1));
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if (title == null) title = location.toNormalform(true, true);
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return new Document[]{new Document(
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location,
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mimeType,
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"UTF-8",
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languages,
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keywords == null ? new String[]{} : keywords.split(keywords.indexOf(',') > 0 ? "," : " "), // keywords
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title, // title
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author == null ? "" : author, // author
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location.getHost(), // Publisher
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new String[]{}, // sections
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description == null ? "" : description, // description
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infoString.getBytes(), // content text
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anchors, // anchors
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images,
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false)}; // images
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}
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public Set<String> supportedMimeTypes() {
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return SUPPORTED_MIME_TYPES;
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}
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public Set<String> supportedExtensions() {
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return SUPPORTED_EXTENSIONS;
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}
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public static ImageInfo parseJavaImage(
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final MultiProtocolURI location,
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final InputStream sourceStream) throws Parser.Failure {
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BufferedImage image = null;
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try {
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ImageIO.setUseCache(false); // do not write a cache to disc; keep in RAM
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image = ImageIO.read(sourceStream);
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} catch (final EOFException e) {
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Log.logException(e);
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throw new Parser.Failure(e.getMessage(), location);
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} catch (final IOException e) {
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Log.logException(e);
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throw new Parser.Failure(e.getMessage(), location);
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}
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if (image == null) throw new Parser.Failure("ImageIO returned NULL", location);
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return parseJavaImage(location, image);
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}
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public static ImageInfo parseJavaImage(
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final MultiProtocolURI location,
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final BufferedImage image) {
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ImageInfo ii = new ImageInfo(location);
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ii.image = image;
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// scan the image
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ii.height = ii.image.getHeight();
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ii.width = ii.image.getWidth();
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/*
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Raster raster = image.getData();
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int[] pixel = raster.getPixel(0, 0, (int[])null);
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long[] average = new long[pixel.length];
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for (int i = 0; i < average.length; i++) average[i] = 0L;
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int pc = 0;
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for (int x = width / 4; x < 3 * width / 4; x = x + 2) {
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for (int y = height / 4; y < 3 * height / 4; y = y + 2) {
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pixel = raster.getPixel(x, y, pixel);
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for (int i = 0; i < average.length; i++) average[i] += pixel[i];
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pc++;
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}
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}
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*/
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// get image properties
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String [] propNames = ii.image.getPropertyNames();
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if (propNames == null) propNames = new String[0];
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ii.info.append("\n");
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for (String propName: propNames) {
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ii.info.append(propName).append(" = ").append(ii.image.getProperty(propName)).append(" .\n");
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}
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// append also properties that we measured
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ii.info.append("width").append(": ").append(Integer.toString(ii.width)).append(" .\n");
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ii.info.append("height").append(": ").append(Integer.toString(ii.height)).append(" .\n");
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return ii;
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}
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public static class ImageInfo {
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public MultiProtocolURI location;
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public BufferedImage image;
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public StringBuilder info;
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public int height;
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public int width;
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public ImageInfo(final MultiProtocolURI location) {
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this.location = location;
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this.image = null;
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this.info = new StringBuilder();
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this.height = -1;
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this.width = -1;
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}
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}
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public static void main(final String[] args) {
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File image = new File(args[0]);
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genericImageParser parser = new genericImageParser();
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MultiProtocolURI uri;
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try {
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uri = new MultiProtocolURI("http://localhost/" + image.getName());
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Document[] document = parser.parse(uri, "image/" + uri.getFileExtension(), "UTF-8", new FileInputStream(image));
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System.out.println(document[0].toString());
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} catch (MalformedURLException e) {
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e.printStackTrace();
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} catch (FileNotFoundException e) {
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e.printStackTrace();
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} catch (Parser.Failure e) {
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e.printStackTrace();
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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}
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