mirror of
https://github.com/yacy/yacy_search_server.git
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b79f4f062f
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6426 6c8d7289-2bf4-0310-a012-ef5d649a1542
277 lines
13 KiB
Java
277 lines
13 KiB
Java
//vcfParser.java
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//------------------------
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//part of YaCy
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//(C) by Michael Peter Christen; mc@yacy.net
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//first published on http://www.anomic.de
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//Frankfurt, Germany, 2005
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//
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//this file is contributed by Martin Thelian
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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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;
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import java.io.BufferedReader;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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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.LinkedList;
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import java.util.Set;
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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.Idiom;
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import net.yacy.document.ParserException;
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import net.yacy.kelondro.data.meta.DigestURI;
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import net.yacy.kelondro.order.Base64Order;
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/**
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* Vcard specification: http://www.imc.org/pdi/vcard-21.txt
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* @author theli
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*
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*/
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public class vcfParser extends AbstractParser implements Idiom {
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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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* TODO: support of x-mozilla-cpt and x-mozilla-html tags
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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("vcf");
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SUPPORTED_MIME_TYPES.add("text/x-vcard");
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SUPPORTED_MIME_TYPES.add("application/vcard");
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SUPPORTED_MIME_TYPES.add("application/x-versit");
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SUPPORTED_MIME_TYPES.add("text/x-versit");
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SUPPORTED_MIME_TYPES.add("text/x-vcalendar");
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}
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public vcfParser() {
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super("vCard Parser");
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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 Document parse(final DigestURI url, final String mimeType, final String charset, final InputStream source) throws ParserException, InterruptedException {
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try {
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final StringBuilder parsedTitle = new StringBuilder();
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final StringBuilder parsedDataText = new StringBuilder();
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final HashMap<String, String> parsedData = new HashMap<String, String>();
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final HashMap<DigestURI, String> anchors = new HashMap<DigestURI, String>();
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final LinkedList<String> parsedNames = new LinkedList<String>();
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boolean useLastLine = false;
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int lineNr = 0;
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String line = null;
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final BufferedReader inputReader = (charset!=null)
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? new BufferedReader(new InputStreamReader(source,charset))
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: new BufferedReader(new InputStreamReader(source));
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while (true) {
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// check for interruption
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checkInterruption();
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// getting the next line
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if (!useLastLine) {
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line = inputReader.readLine();
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} else {
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useLastLine = false;
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}
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if (line == null) break;
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else if (line.length() == 0) continue;
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lineNr++;
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final int pos = line.indexOf(":");
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if (pos != -1) {
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final String key = line.substring(0,pos).trim().toUpperCase();
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String value = line.substring(pos+1).trim();
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String encoding = null;
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final String[] keyParts = key.split(";");
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if (keyParts.length > 1) {
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for (int i=0; i < keyParts.length; i++) {
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if (keyParts[i].toUpperCase().startsWith("ENCODING")) {
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encoding = keyParts[i].substring("ENCODING".length()+1);
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} else if (keyParts[i].toUpperCase().startsWith("QUOTED-PRINTABLE")) {
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encoding = "QUOTED-PRINTABLE";
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} else if (keyParts[i].toUpperCase().startsWith("BASE64")) {
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encoding = "BASE64";
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}
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}
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if (encoding != null) {
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try {
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if (encoding.equalsIgnoreCase("QUOTED-PRINTABLE")) {
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// if the value has multiple lines ...
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if (line.endsWith("=")) {
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do {
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value = value.substring(0,value.length()-1);
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line = inputReader.readLine();
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if (line == null) break;
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value += line;
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} while (line.endsWith("="));
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}
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value = decodeQuotedPrintable(value);
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} else if (encoding.equalsIgnoreCase("base64")) {
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do {
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line = inputReader.readLine();
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if (line == null) break;
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if (line.indexOf(":")!= -1) {
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// we have detected an illegal block end of the base64 data
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useLastLine = true;
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}
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if (!useLastLine) value += line.trim();
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else break;
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} while (line.length()!=0);
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value = Base64Order.standardCoder.decodeString(value);
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}
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} catch (final Exception ey) {
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// Encoding error: This could occure e.g. if the base64 doesn't
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// end with an empty newline
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//
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// We can simply ignore it.
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}
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}
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}
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if (key.equalsIgnoreCase("END")) {
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String name = null, title = null;
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// using the name of the current version as section headline
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if (parsedData.containsKey("FN")) {
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parsedNames.add(name = parsedData.get("FN"));
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} else if (parsedData.containsKey("N")) {
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parsedNames.add(name = parsedData.get("N"));
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} else {
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parsedNames.add(name = "unknown name");
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}
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// getting the vcard title
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if (parsedData.containsKey("TITLE")) {
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parsedNames.add(title = parsedData.get("TITLE"));
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}
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if (parsedTitle.length() > 0) parsedTitle.append(", ");
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parsedTitle.append((title==null)?name:name + " - " + title);
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// looping through the properties and add there values to
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// the text representation of the vCard
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final Iterator<String> iter = parsedData.values().iterator();
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while (iter.hasNext()) {
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value = iter.next();
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parsedDataText.append(value).append("\r\n");
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}
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parsedDataText.append("\r\n");
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parsedData.clear();
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} else if (key.toUpperCase().startsWith("URL")) {
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try {
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final DigestURI newURL = new DigestURI(value, null);
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anchors.put(newURL, newURL.toString());
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//parsedData.put(key,value);
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} catch (final MalformedURLException ex) {/* ignore this */}
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} else if (
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!key.equalsIgnoreCase("BEGIN") &&
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!key.equalsIgnoreCase("END") &&
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!key.equalsIgnoreCase("VERSION") &&
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!key.toUpperCase().startsWith("LOGO") &&
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!key.toUpperCase().startsWith("PHOTO") &&
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!key.toUpperCase().startsWith("SOUND") &&
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!key.toUpperCase().startsWith("KEY") &&
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!key.toUpperCase().startsWith("X-")
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) {
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// value = value.replaceAll(";","\t");
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if ((value.length() > 0)) parsedData.put(key, value);
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}
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} else {
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if (theLogger.isFinest()) this.theLogger.logFinest("Invalid data in vcf file" +
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"\n\tURL: " + url +
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"\n\tLine: " + line +
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"\n\tLine-Nr: " + lineNr);
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}
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}
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final String[] sections = parsedNames.toArray(new String[parsedNames.size()]);
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final byte[] text = parsedDataText.toString().getBytes();
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final Document theDoc = new Document(
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url, // url of the source document
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mimeType, // the documents mime type
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null,
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null, // a list of extracted keywords
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null, // the language
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parsedTitle.toString(), // a long document title
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"", // TODO: AUTHOR
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sections, // an array of section headlines
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"vCard", // an abstract
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text, // the parsed document text
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anchors, // a map of extracted anchors
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null); // a treeset of image URLs
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return theDoc;
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} catch (final Exception e) {
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if (e instanceof InterruptedException) throw (InterruptedException) e;
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if (e instanceof ParserException) throw (ParserException) e;
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throw new ParserException("Unexpected error while parsing vcf resource. " + e.getMessage(),url);
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}
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}
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@Override
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public void reset() {
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// Nothing todo here at the moment
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super.reset();
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}
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public static final String decodeQuotedPrintable(final String s) {
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if (s == null) return null;
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final byte[] b = s.getBytes();
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final StringBuilder sb = new StringBuilder();
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for (int i = 0; i < b.length; i++) {
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final int c = b[i];
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if (c == '=') {
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try {
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final int u = Character.digit((char) b[++i], 16);
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final int l = Character.digit((char) b[++i], 16);
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if (u == -1 || l == -1) throw new RuntimeException("bad quoted-printable encoding");
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sb.append((char) ((u << 4) + l));
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} catch (final ArrayIndexOutOfBoundsException e) {
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throw new RuntimeException("bad quoted-printable encoding");
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}
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} else {
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sb.append((char) c);
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}
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}
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return sb.toString();
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}
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}
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