//swfParser.java
//------------------------
//part of YaCy
//(C) by Michael Peter Christen; mc@yacy.net
//first published on http://www.anomic.de
//Frankfurt, Germany, 2005
//
//this file is contributed by Marc Nause
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
//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
package de.anomic.document.parser;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;
import pt.tumba.parser.swf.SWF2HTML;
import de.anomic.document.AbstractParser;
import de.anomic.document.Idiom;
import de.anomic.document.ParserException;
import de.anomic.document.Document;
import de.anomic.yacy.yacyURL;
public class swfParser extends AbstractParser implements Idiom {
/**
* a list of mime types that are supported by this parser class
* @see #getSupportedMimeTypes()
*/
public static final Set<String> SUPPORTED_MIME_TYPES = new HashSet<String>();
public static final Set<String> SUPPORTED_EXTENSIONS = new HashSet<String>();
static {
SUPPORTED_EXTENSIONS.add("swf");
SUPPORTED_MIME_TYPES.add("application/x-shockwave-flash");
SUPPORTED_MIME_TYPES.add("application/x-shockwave-flash2-preview");
SUPPORTED_MIME_TYPES.add("application/futuresplash");
SUPPORTED_MIME_TYPES.add("image/vnd.rn-realflash");
}
public swfParser() {
super("Adobe Flash Parser");
}
public Set<String> supportedMimeTypes() {
return SUPPORTED_MIME_TYPES;
}
public Set<String> supportedExtensions() {
return SUPPORTED_EXTENSIONS;
}
/*
* parses the source documents and returns a plasmaParserDocument containing
* all extracted information about the parsed document
*/
public Document parse(final yacyURL location, final String mimeType, final String charset, final InputStream source) throws ParserException, InterruptedException {
try {
final SWF2HTML swf2html = new SWF2HTML();
String contents = "";
try {
contents = swf2html.convertSWFToHTML(source);
} catch (NegativeArraySizeException e) {
// seen in log
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
} catch (Exception e) {
// we have seen a lot of OOM errors in the parser...
e.printStackTrace();
return null;
}
String url = null;
String urlnr = null;
final String linebreak = System.getProperty("line.separator");
final String[] sections = null;
final String abstrct = null;
//TreeSet images = null;
final HashMap<yacyURL, String> anchors = new HashMap<yacyURL, String>();
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 = (Integer.valueOf(++urls)).toString();
anchors.put(new yacyURL(url, null), urlnr);
contents = contents.substring(0,urlStart)+contents.substring(urlEnd);
}
// As the result of parsing this function must return a plasmaParserDocument object
final Document theDoc = new Document(
location, // url of the source document
mimeType, // the documents mime type
"UTF-8", // charset of the document text
null,
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 (final Exception e) {
if (e instanceof InterruptedException) throw (InterruptedException) e;
// if an unexpected error occures just log the error and raise a new ParserException
final String errorMsg = "Unable to parse the swf document '" + location + "':" + e.getMessage();
this.theLogger.logSevere(errorMsg);
throw new ParserException(errorMsg, location);
}
}
@Override
public void reset() {
// this code is executed if the parser class is returned into the parser pool
super.reset();
}
}