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209 lines
8.0 KiB
209 lines
8.0 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 ths 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.ArrayList;
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import java.util.Arrays;
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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.Map;
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public class RobotsEntry {
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public static final String ROBOTS_DB_PATH_SEPARATOR = ";";
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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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Map<String, String> mem;
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private LinkedList<String> allowPathList, denyPathList;
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String hostName;
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public RobotsEntry(final String hostName, final Map<String, String> 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 = this.mem.get(DISALLOW_PATH_LIST);
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if (csPl.length() > 0){
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final String[] pathArray = csPl.split(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 = this.mem.get(ALLOW_PATH_LIST);
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if (csPl.length() > 0){
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final String[] pathArray = csPl.split(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 String hostName,
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final ArrayList<String> allowPathList,
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final ArrayList<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 ((hostName == null) || (hostName.length() == 0)) throw new IllegalArgumentException("The hostname is missing");
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this.hostName = hostName.trim().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 HashMap<String, String>(10);
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if (loadedDate != null) this.mem.put(LOADED_DATE,Long.toString(loadedDate.getTime()));
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if (modDate != null) this.mem.put(MOD_DATE,Long.toString(modDate.getTime()));
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if (eTag != null) this.mem.put(ETAG,eTag);
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if (sitemap != null) this.mem.put(SITEMAP,sitemap);
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if (crawlDelayMillis > 0) this.mem.put(CRAWL_DELAY_MILLIS, Long.toString(crawlDelayMillis));
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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 (int i=0; i<allowPathList.size();i++) {
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pathListStr.append(allowPathList.get(i))
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.append(ROBOTS_DB_PATH_SEPARATOR);
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}
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this.mem.put(ALLOW_PATH_LIST,pathListStr.substring(0,pathListStr.length()-1));
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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 (int i=0; i<disallowPathList.size();i++) {
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pathListStr.append(disallowPathList.get(i))
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.append(ROBOTS_DB_PATH_SEPARATOR);
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}
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this.mem.put(DISALLOW_PATH_LIST,pathListStr.substring(0,pathListStr.length()-1));
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}
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}
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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)
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.append(": ");
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if (this.mem != null) {
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str.append(this.mem.toString());
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}
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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)? 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(Long.valueOf(this.mem.get(LOADED_DATE)).longValue());
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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()));
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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(Long.valueOf(this.mem.get(MOD_DATE)).longValue());
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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 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 Long.parseLong(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 * Integer.parseInt(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 = path.replaceAll(ROBOTS_DB_PATH_SEPARATOR,"%3B");
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final Iterator<String> pathIter = this.denyPathList.iterator();
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while (pathIter.hasNext()) {
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final String nextPath = pathIter.next();
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// disallow rule
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if (path.startsWith(nextPath)) {
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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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} |