//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 net.yacy.document.parser; import java.io.IOException; import java.io.InputStream; import java.util.HashMap; import java.util.HashSet; import java.util.Set; import net.yacy.document.AbstractParser; import net.yacy.document.Document; import net.yacy.document.Idiom; import net.yacy.document.ParserException; import net.yacy.kelondro.data.meta.DigestURI; import net.yacy.kelondro.logging.Log; import pt.tumba.parser.swf.SWF2HTML; 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 SUPPORTED_MIME_TYPES = new HashSet(); public static final Set SUPPORTED_EXTENSIONS = new HashSet(); 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 supportedMimeTypes() { return SUPPORTED_MIME_TYPES; } public Set supportedExtensions() { return SUPPORTED_EXTENSIONS; } /* * parses the source documents and returns a plasmaParserDocument containing * all extracted information about the parsed document */ public Document parse(final DigestURI 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) { // seems to happen quite often return null; } catch (Exception e) { // we have seen a lot of OOM errors in the parser... Log.logException(e); 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 anchors = new HashMap(); int urls = 0; int urlStart = -1; int urlEnd = 0; int p0 = 0; //getting rid of HTML-Tags p0 = contents.indexOf(""); contents = contents.substring(p0+12); p0 = contents.indexOf(""); 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 DigestURI(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(); } }