//docParser.java
//------------------------
//part of YaCy
//(C) by Michael Peter Christen; mc@anomic.de
//first published on http://www.anomic.de
//Frankfurt, Germany, 2005
//
//this file is contributed by Marc Nause
//last major change: 01.11.2006
//
//This program is free software; you can redistribute it and/or modify
//it under the terms of the GNU General Public License as published by
//the Free Software Foundation; either version 2 of the License, or
//(at your option) any later version.
//
//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//GNU General Public License for more details.
//
//You should have received a copy of the GNU General Public License
//along with this program; if not, write to the Free Software
//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
//Using this software in any meaning (reading, learning, copying, compiling,
//running) means that you agree that the Author(s) is (are) not responsible
//for cost, loss of data or any harm that may be caused directly or indirectly
//by usage of this softare or this documentation. The usage of this software
//is on your own risk. The installation and usage (starting/running) of this
//software may allow other people or application to access your computer and
//any attached devices and is highly dependent on the configuration of the
//software which must be done by the user of the software; the author(s) is
//(are) also not responsible for proper configuration and usage of the
//software, even if provoked by documentation provided together with
//the software.
//
//Any changes to this file according to the GPL as documented in the file
//gpl.txt aside this file in the shipment you received can be done to the
//lines that follows this copyright notice here, but changes must not be
//done inside the copyright notive above. A re-distribution must contain
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//Contributions and changes to the program code must be marked as such.
package de.anomic.plasma.parser.swf;
import java.io.InputStream;
import java.util.Hashtable;
import java.util.HashMap;
import pt.tumba.parser.swf.*;
import de.anomic.plasma.plasmaParserDocument;
import de.anomic.plasma.parser.AbstractParser;
import de.anomic.plasma.parser.Parser;
import de.anomic.plasma.parser.ParserException;
import de.anomic.yacy.yacyURL;
public class swfParser extends AbstractParser implements Parser {
/**
* a list of mime types that are supported by this parser class
* @see #getSupportedMimeTypes()
*/
public static final Hashtable SUPPORTED_MIME_TYPES = new Hashtable();
static {
SUPPORTED_MIME_TYPES.put("application/x-shockwave-flash","swf");
SUPPORTED_MIME_TYPES.put("application/x-shockwave-flash2-preview","swf");
}
/**
* a list of library names that are needed by this parser
* @see Parser#getLibxDependences()
*/
private static final String[] LIBX_DEPENDENCIES = new String[] {"webcat-0.1-swf.jar"};
public swfParser() {
super(LIBX_DEPENDENCIES);
this.parserName = "Adobe Flash Parser";
this.parserVersionNr = "0.1";
}
/**
* returns a hashtable containing the mimetypes that are supported by this class
*/
public Hashtable getSupportedMimeTypes() {
return SUPPORTED_MIME_TYPES;
}
/*
* parses the source documents and returns a plasmaParserDocument containing
* all extracted information about the parsed document
*/
public plasmaParserDocument parse(yacyURL location, String mimeType, String charset, InputStream source) throws ParserException, InterruptedException {
try {
SWF2HTML swf2html = new SWF2HTML();
String contents = swf2html.convertSWFToHTML(source);
String url = null;
String urlnr = null;
String linebreak = System.getProperty("line.separator");
String[] sections = null;
String abstrct = null;
//TreeSet images = null;
HashMap anchors = new HashMap();
int urls = 0;
int urlStart = -1;
int urlEnd = 0;
int p0 = 0;
//getting rid of HTML-Tags
p0 = contents.indexOf("<html><body>");
contents = contents.substring(p0+12);
p0 = contents.indexOf("</body></html>");
contents = contents.substring(0,p0);
//extracting urls
while ((urlStart = contents.indexOf("http://",urlEnd)) >= 0){
urlEnd = contents.indexOf(linebreak,urlStart);
url = contents.substring(urlStart,urlEnd);
urlnr = (new Integer(++urls)).toString();
anchors.put(url,urlnr);
contents = contents.substring(0,urlStart)+contents.substring(urlEnd);
}
// As the result of parsing this function must return a plasmaParserDocument object
plasmaParserDocument theDoc = new plasmaParserDocument(
location, // url of the source document
mimeType, // the documents mime type
"UTF-8", // charset of the document text
null, //keywords
((contents.length() > 80)? contents.substring(0, 80):contents.trim()).
replaceAll("\r\n"," ").
replaceAll("\n"," ").
replaceAll("\r"," ").
replaceAll("\t"," "), // title
"", // TODO: AUTHOR
sections, // an array of section headlines
abstrct, // an abstract
contents.getBytes("UTF-8"), // the parsed document text
anchors, // a map of extracted anchors
null); // a treeset of image URLs
return theDoc;
} catch (Exception e) {
if (e instanceof InterruptedException) throw (InterruptedException) e;
// if an unexpected error occures just log the error and raise a new ParserException
String errorMsg = "Unable to parse the swf document '" + location + "':" + e.getMessage();
this.theLogger.logSevere(errorMsg);
throw new ParserException(errorMsg, location);
}
}
public void reset() {
// this code is executed if the parser class is returned into the parser pool
super.reset();
}
}