mirror of
https://github.com/yacy/yacy_search_server.git
synced 2026-10-25 05:54:15 +00:00
Michael Peter Christen
fed26f33a8
to support the new time parser and search functions in YaCy a high precision detection of date and time on the day is necessary. That requires that the time zone of the document content and the time zone of the user, doing a search, is detected. The time zone of the search request is done automatically using the browsers time zone offset which is delivered to the search request automatically and invisible to the user. The time zone for the content of web pages cannot be detected automatically and must be an attribute of crawl starts. The advanced crawl start now provides an input field to set the time zone in minutes as an offset number. All parsers must get a time zone offset passed, so this required the change of the parser java api. A lot of other changes had been made which corrects the wrong handling of dates in YaCy which was to add a correction based on the time zone of the server. Now no correction is added and all dates in YaCy are UTC/GMT time zone, a normalized time zone for all peers.
270 lines
12 KiB
Java
270 lines
12 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.IOException;
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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.ArrayList;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.List;
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import net.yacy.cora.document.encoding.UTF8;
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import net.yacy.cora.document.id.AnchorURL;
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import net.yacy.cora.order.Base64Order;
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import net.yacy.cora.util.CommonPattern;
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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.VocabularyScraper;
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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 Parser {
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public vcfParser() {
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super("vCard Parser");
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this.SUPPORTED_EXTENSIONS.add("vcf");
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this.SUPPORTED_MIME_TYPES.add("text/x-vcard");
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this.SUPPORTED_MIME_TYPES.add("application/vcard");
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this.SUPPORTED_MIME_TYPES.add("application/x-versit");
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this.SUPPORTED_MIME_TYPES.add("text/x-versit");
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this.SUPPORTED_MIME_TYPES.add("text/x-vcalendar");
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}
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@Override
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public Document[] parse(
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final AnchorURL location,
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final String mimeType,
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final String charset,
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final VocabularyScraper scraper,
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final int timezoneOffset,
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final InputStream source)
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throws Parser.Failure, 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 List<AnchorURL> anchors = new ArrayList<AnchorURL>();
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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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// get 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.isEmpty()) continue;
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lineNr++;
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final int pos = line.indexOf(':',0);
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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 = CommonPattern.SEMICOLON.split(key);
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if (keyParts.length > 1) {
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for (final String keyPart : keyParts) {
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if (keyPart.toUpperCase().startsWith("ENCODING")) {
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encoding = keyPart.substring("ENCODING".length()+1);
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} else if (keyPart.toUpperCase().startsWith("QUOTED-PRINTABLE")) {
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encoding = "QUOTED-PRINTABLE";
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} else if (keyPart.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(':',0)!= -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 AnchorURL newURL = new AnchorURL(value);
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newURL.setNameProperty(newURL.toNormalform(false));
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anchors.add(newURL);
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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 (AbstractParser.log.isFinest()) AbstractParser.log.finest("Invalid data in vcf file" +
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"\n\tURL: " + location +
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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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try {inputReader.close();} catch (final IOException e) {}
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final String[] sections = parsedNames.toArray(new String[parsedNames.size()]);
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final byte[] text = UTF8.getBytes(parsedDataText.toString());
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final List<String> descriptions = new ArrayList<String>(1); descriptions.add("vCard");
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return new Document[]{new Document(
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location, // url of the source document
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mimeType, // the documents mime type
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null, // charset
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this,
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null, // set of languages
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null, // a list of extracted keywords
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singleList(parsedTitle.toString()), // a long document title
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"", // TODO: AUTHOR
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"", // the publisher
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sections, // an array of section headlines
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descriptions, // an abstract
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0.0f, 0.0f,
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text, // the parsed document text
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anchors, // a map of extracted anchors
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null,
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null, // a treeset of image URLs
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false,
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new Date())};
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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 Parser.Failure) throw (Parser.Failure) e;
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throw new Parser.Failure("Unexpected error while parsing vcf resource. " + e.getMessage(), location);
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}
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}
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private String decodeQuotedPrintable(final String s) {
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if (s == null) return null;
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final byte[] b = UTF8.getBytes(s);
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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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