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https://github.com/yacy/yacy_search_server.git
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b6fb239e74
some file types are containers for several files. These containers had been parsed in such a way that the set of resulting parsed content was merged into one single document before parsing. Using this parser infrastructure it is not possible to parse document containers that contain individual files. An example is a rss file where the rss messages can be treated as individual documents with their own url reference. Another example is a surrogate file which was treated with a special operation outside of the parser infrastructure. This commit introduces a redesigned parser interface and a new abstract parser implementation. The new parser interface has now only one entry point and returns always a set of parsed documents. In case of single documents the parser method returns a set of one documents. To be compliant with the new interface, the zip and tar parser had been also completely redesigned. All parsers are now much more simple and cleaner in its structure. The switchboard operations had been extended to operate with sets of parsed files, not single parsed files. additionally, parsing of jar manifest files had been added. git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6955 6c8d7289-2bf4-0310-a012-ef5d649a1542
248 lines
12 KiB
Java
248 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.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.Iterator;
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import java.util.LinkedList;
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import net.yacy.cora.document.MultiProtocolURI;
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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.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 Parser {
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public vcfParser() {
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super("vCard Parser");
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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 Document[] parse(final MultiProtocolURI url, final String mimeType, final String charset, final InputStream source) 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 HashMap<MultiProtocolURI, String> anchors = new HashMap<MultiProtocolURI, 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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// 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.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 MultiProtocolURI newURL = new MultiProtocolURI(value);
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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 (log.isFinest()) this.log.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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return new Document[]{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, // charset
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null, // set of languages
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null, // a list of extracted keywords
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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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"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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false)};
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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(),url);
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}
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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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