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212 lines
8.3 KiB
212 lines
8.3 KiB
//RobotsEntry.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, 2004
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//
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//This file is contributed by Martin Thelian
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// [MC] moved some methods from robotsParser file that had been created by Alexander Schier to this class
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// [MC] redesign: removed entry object from RobotsTxt Class into this separate class
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//last major change: $LastChangedDate$ by $LastChangedBy$
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//Revision: $LastChangedRevision$
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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 de.anomic.crawler;
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import java.util.Arrays;
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import java.util.Date;
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import java.util.LinkedHashMap;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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import net.yacy.cora.document.MultiProtocolURI;
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import net.yacy.kelondro.util.ByteArray;
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public class RobotsEntry {
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public static final String HOST_NAME = "hostname";
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public static final String ALLOW_PATH_LIST = "allow";
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public static final String DISALLOW_PATH_LIST = "disallow";
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public static final String LOADED_DATE = "date";
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public static final String MOD_DATE = "modDate";
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public static final String ETAG = "etag";
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public static final String SITEMAP = "sitemap";
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public static final String CRAWL_DELAY = "crawlDelay";
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public static final String CRAWL_DELAY_MILLIS = "crawlDelayMillis";
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// this is a simple record structure that holds all properties of a single crawl start
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private Map<String, byte[]> mem;
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private List<String> allowPathList, denyPathList;
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String hostName;
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public RobotsEntry(final String hostName, final Map<String, byte[]> mem) {
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this.hostName = hostName.toLowerCase();
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this.mem = mem;
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if (this.mem.containsKey(DISALLOW_PATH_LIST)) {
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this.denyPathList = new LinkedList<String>();
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final String csPl = new String(this.mem.get(DISALLOW_PATH_LIST));
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if (csPl.length() > 0){
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final String[] pathArray = csPl.split(RobotsTxt.ROBOTS_DB_PATH_SEPARATOR);
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if ((pathArray != null)&&(pathArray.length > 0)) {
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this.denyPathList.addAll(Arrays.asList(pathArray));
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}
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}
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} else {
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this.denyPathList = new LinkedList<String>();
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}
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if (this.mem.containsKey(ALLOW_PATH_LIST)) {
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this.allowPathList = new LinkedList<String>();
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final String csPl = new String(this.mem.get(ALLOW_PATH_LIST));
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if (csPl.length() > 0){
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final String[] pathArray = csPl.split(RobotsTxt.ROBOTS_DB_PATH_SEPARATOR);
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if ((pathArray != null)&&(pathArray.length > 0)) {
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this.allowPathList.addAll(Arrays.asList(pathArray));
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}
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}
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} else {
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this.allowPathList = new LinkedList<String>();
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}
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}
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public RobotsEntry(
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final MultiProtocolURI theURL,
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final List<String> allowPathList,
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final List<String> disallowPathList,
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final Date loadedDate,
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final Date modDate,
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final String eTag,
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final String sitemap,
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final long crawlDelayMillis
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) {
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if (theURL == null) throw new IllegalArgumentException("The url is missing");
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this.hostName = RobotsTxt.getHostPort(theURL).toLowerCase();
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this.allowPathList = new LinkedList<String>();
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this.denyPathList = new LinkedList<String>();
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this.mem = new LinkedHashMap<String, byte[]>(10);
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this.mem.put(HOST_NAME, this.hostName.getBytes());
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if (loadedDate != null) this.mem.put(LOADED_DATE, Long.toString(loadedDate.getTime()).getBytes());
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if (modDate != null) this.mem.put(MOD_DATE, Long.toString(modDate.getTime()).getBytes());
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if (eTag != null) this.mem.put(ETAG, eTag.getBytes());
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if (sitemap != null) this.mem.put(SITEMAP, sitemap.getBytes());
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if (crawlDelayMillis > 0) this.mem.put(CRAWL_DELAY_MILLIS, Long.toString(crawlDelayMillis).getBytes());
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if (allowPathList != null && !allowPathList.isEmpty()) {
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this.allowPathList.addAll(allowPathList);
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final StringBuilder pathListStr = new StringBuilder(allowPathList.size() * 30);
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for (String element : allowPathList) {
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pathListStr.append(element)
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.append(RobotsTxt.ROBOTS_DB_PATH_SEPARATOR);
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}
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this.mem.put(ALLOW_PATH_LIST, pathListStr.substring(0,pathListStr.length()-1).getBytes());
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}
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if (disallowPathList != null && !disallowPathList.isEmpty()) {
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this.denyPathList.addAll(disallowPathList);
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final StringBuilder pathListStr = new StringBuilder(disallowPathList.size() * 30);
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for (String element : disallowPathList) {
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pathListStr.append(element)
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.append(RobotsTxt.ROBOTS_DB_PATH_SEPARATOR);
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}
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this.mem.put(DISALLOW_PATH_LIST,pathListStr.substring(0, pathListStr.length()-1).getBytes());
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}
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}
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public Map<String, byte[]> getMem() {
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if (!this.mem.containsKey(HOST_NAME)) this.mem.put(HOST_NAME, this.hostName.getBytes());
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return this.mem;
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}
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@Override
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public String toString() {
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final StringBuilder str = new StringBuilder(6000);
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str.append((this.hostName == null) ? "null" : this.hostName).append(": ");
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if (this.mem != null) str.append(this.mem.toString());
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return str.toString();
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}
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public String getSitemap() {
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return this.mem.containsKey(SITEMAP)? new String(this.mem.get(SITEMAP)): null;
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}
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public Date getLoadedDate() {
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if (this.mem.containsKey(LOADED_DATE)) {
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return new Date(ByteArray.parseDecimal(this.mem.get(LOADED_DATE)));
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}
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return null;
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}
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public void setLoadedDate(final Date newLoadedDate) {
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if (newLoadedDate != null) {
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this.mem.put(LOADED_DATE, Long.toString(newLoadedDate.getTime()).getBytes());
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}
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}
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public Date getModDate() {
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if (this.mem.containsKey(MOD_DATE)) {
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return new Date(ByteArray.parseDecimal(this.mem.get(MOD_DATE)));
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}
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return null;
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}
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public String getETag() {
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if (this.mem.containsKey(ETAG)) {
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return new String(this.mem.get(ETAG));
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}
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return null;
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}
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public long getCrawlDelayMillis() {
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if (this.mem.containsKey(CRAWL_DELAY_MILLIS)) try {
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return ByteArray.parseDecimal(this.mem.get(CRAWL_DELAY_MILLIS));
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} catch (final NumberFormatException e) {
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return 0;
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}
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if (this.mem.containsKey(CRAWL_DELAY)) try {
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return 1000 * ByteArray.parseDecimal(this.mem.get(CRAWL_DELAY));
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} catch (final NumberFormatException e) {
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return 0;
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}
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return 0;
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}
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public boolean isDisallowed(String path) {
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if ((this.mem == null) || (this.denyPathList.isEmpty())) return false;
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// if the path is null or empty we set it to /
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if ((path == null) || (path.length() == 0)) path = "/";
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// escaping all occurences of ; because this char is used as special char in the Robots DB
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else path = RobotsTxt.ROBOTS_DB_PATH_SEPARATOR_MATCHER.matcher(path).replaceAll("%3B");
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for (String element : this.denyPathList) {
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// disallow rule
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if (path.startsWith(element)) {
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return true;
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}
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}
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return false;
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}
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} |