You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
356 lines
18 KiB
356 lines
18 KiB
// plasmaCrawlStacker.java
|
|
// -----------------------
|
|
// part of YaCy
|
|
// (C) by Michael Peter Christen; mc@yacy.net
|
|
// first published on http://www.anomic.de
|
|
// Frankfurt, Germany, 2005
|
|
//
|
|
// This file was contributed by Martin Thelian
|
|
// ([MC] removed all multithreading and thread pools, this is not necessary here; complete renovation 2007)
|
|
//
|
|
// $LastChangedDate$
|
|
// $LastChangedRevision$
|
|
// $LastChangedBy$
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation; either version 2 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
package de.anomic.crawler;
|
|
|
|
import java.net.UnknownHostException;
|
|
import java.util.Date;
|
|
|
|
import de.anomic.index.indexReferenceBlacklist;
|
|
import de.anomic.index.indexURLReference;
|
|
import de.anomic.plasma.plasmaSwitchboard;
|
|
import de.anomic.plasma.plasmaWordIndex;
|
|
import de.anomic.server.serverDomains;
|
|
import de.anomic.server.serverProcessor;
|
|
import de.anomic.server.logging.serverLog;
|
|
import de.anomic.yacy.yacyURL;
|
|
|
|
public final class CrawlStacker {
|
|
|
|
final serverLog log = new serverLog("STACKCRAWL");
|
|
|
|
private serverProcessor<CrawlEntry> fastQueue, slowQueue;
|
|
private long dnsHit, dnsMiss;
|
|
private CrawlQueues nextQueue;
|
|
private plasmaWordIndex wordIndex;
|
|
private boolean acceptLocalURLs, acceptGlobalURLs;
|
|
|
|
// this is the process that checks url for double-occurrences and for allowance/disallowance by robots.txt
|
|
|
|
public CrawlStacker(CrawlQueues cq, plasmaWordIndex wordIndex, boolean acceptLocalURLs, boolean acceptGlobalURLs) {
|
|
this.nextQueue = cq;
|
|
this.wordIndex = wordIndex;
|
|
this.dnsHit = 0;
|
|
this.dnsMiss = 0;
|
|
this.acceptLocalURLs = acceptLocalURLs;
|
|
this.acceptGlobalURLs = acceptGlobalURLs;
|
|
|
|
this.fastQueue = new serverProcessor<CrawlEntry>("CrawlStackerFast", "This process checks new urls before they are enqueued into the balancer (proper, double-check, correct domain, filter)", new String[]{"Balancer"}, this, "job", 10000, null, 2);
|
|
this.slowQueue = new serverProcessor<CrawlEntry>("CrawlStackerSlow", "This is like CrawlStackerFast, but does additionaly a DNS lookup. The CrawlStackerFast does not need this because it can use the DNS cache.", new String[]{"Balancer"}, this, "job", 1000, null, 5);
|
|
|
|
this.log.logInfo("STACKCRAWL thread initialized.");
|
|
}
|
|
|
|
public int size() {
|
|
return this.fastQueue.queueSize() + this.slowQueue.queueSize();
|
|
}
|
|
|
|
public void clear() {
|
|
this.fastQueue.clear();
|
|
this.slowQueue.clear();
|
|
}
|
|
|
|
public void announceClose() {
|
|
this.log.logInfo("Flushing remaining " + size() + " crawl stacker job entries.");
|
|
this.fastQueue.announceShutdown();
|
|
this.slowQueue.announceShutdown();
|
|
}
|
|
|
|
public void close() {
|
|
this.log.logInfo("Shutdown. waiting for remaining " + size() + " crawl stacker job entries. please wait.");
|
|
this.fastQueue.announceShutdown();
|
|
this.slowQueue.announceShutdown();
|
|
this.fastQueue.awaitShutdown(2000);
|
|
this.slowQueue.awaitShutdown(2000);
|
|
|
|
this.log.logInfo("Shutdown. Closing stackCrawl queue.");
|
|
|
|
clear();
|
|
}
|
|
|
|
private boolean prefetchHost(final String host) {
|
|
// returns true when the host was known in the dns cache.
|
|
// If not, the host is stacked on the fetch stack and false is returned
|
|
try {
|
|
if (serverDomains.dnsResolveFromCache(host) != null) return true; // found entry
|
|
} catch (final UnknownHostException e) {
|
|
// we know that this is unknown
|
|
return false;
|
|
}
|
|
// we just don't know anything about that host
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
public boolean job() {
|
|
if (this.fastQueue.queueSize() > 0 && job(this.fastQueue)) return true;
|
|
if (this.slowQueue.queueSize() == 0) return false;
|
|
return job(this.slowQueue);
|
|
}
|
|
*/
|
|
|
|
public CrawlEntry job(CrawlEntry entry) {
|
|
// this is the method that is called by the busy thread from outside
|
|
if (entry == null) return null;
|
|
|
|
try {
|
|
final String rejectReason = stackCrawl(entry);
|
|
|
|
// if the url was rejected we store it into the error URL db
|
|
if (rejectReason != null) {
|
|
final ZURL.Entry ee = nextQueue.errorURL.newEntry(entry, wordIndex.seedDB.mySeed().hash, new Date(), 1, rejectReason);
|
|
ee.store();
|
|
nextQueue.errorURL.push(ee);
|
|
}
|
|
} catch (final Exception e) {
|
|
CrawlStacker.this.log.logWarning("Error while processing stackCrawl entry.\n" + "Entry: " + entry.toString() + "Error: " + e.toString(), e);
|
|
return null;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public void enqueueEntry(final CrawlEntry entry) {
|
|
|
|
// DEBUG
|
|
if (log.isFinest()) log.logFinest("ENQUEUE "+ entry.url() +", referer="+entry.referrerhash() +", initiator="+entry.initiator() +", name="+entry.name() +", load="+entry.loaddate() +", depth="+entry.depth());
|
|
|
|
if (prefetchHost(entry.url().getHost())) {
|
|
try {
|
|
this.fastQueue.enQueue(entry);
|
|
this.dnsHit++;
|
|
} catch (InterruptedException e) {
|
|
e.printStackTrace();
|
|
}
|
|
} else {
|
|
try {
|
|
this.slowQueue.enQueue(entry);
|
|
this.dnsMiss++;
|
|
} catch (InterruptedException e) {
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
}
|
|
|
|
public String stackCrawl(final CrawlEntry entry) {
|
|
// stacks a crawl item. The position can also be remote
|
|
// returns null if successful, a reason string if not successful
|
|
//this.log.logFinest("stackCrawl: nexturlString='" + nexturlString + "'");
|
|
|
|
final long startTime = System.currentTimeMillis();
|
|
String reason = null; // failure reason
|
|
|
|
// check if the protocol is supported
|
|
final String urlProtocol = entry.url().getProtocol();
|
|
if (!nextQueue.isSupportedProtocol(urlProtocol)) {
|
|
reason = "unsupported protocol";
|
|
this.log.logSevere("Unsupported protocol in URL '" + entry.url().toString() + "'. " +
|
|
"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
|
|
return reason;
|
|
}
|
|
|
|
// check if ip is local ip address
|
|
final String urlRejectReason = urlInAcceptedDomain(entry.url());
|
|
if (urlRejectReason != null) {
|
|
reason = "denied_(" + urlRejectReason + ")";
|
|
if (this.log.isFine()) this.log.logFine(reason + "Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
|
|
return reason;
|
|
}
|
|
|
|
// check blacklist
|
|
if (plasmaSwitchboard.urlBlacklist.isListed(indexReferenceBlacklist.BLACKLIST_CRAWLER, entry.url())) {
|
|
reason = "url in blacklist";
|
|
if (this.log.isFine()) this.log.logFine("URL '" + entry.url().toString() + "' is in blacklist. " +
|
|
"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
|
|
return reason;
|
|
}
|
|
|
|
final CrawlProfile.entry profile = wordIndex.profilesActiveCrawls.getEntry(entry.profileHandle());
|
|
if (profile == null) {
|
|
final String errorMsg = "LOST STACKER PROFILE HANDLE '" + entry.profileHandle() + "' for URL " + entry.url();
|
|
log.logWarning(errorMsg);
|
|
return errorMsg;
|
|
}
|
|
|
|
// filter with must-match
|
|
if ((entry.depth() > 0) && !profile.mustMatchPattern().matcher(entry.url().toString()).matches()) {
|
|
reason = "url does not match must-match filter";
|
|
if (this.log.isFine()) this.log.logFine("URL '" + entry.url().toString() + "' does not match must-match crawling filter '" + profile.mustMatchPattern().toString() + "'. " +
|
|
"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
|
|
return reason;
|
|
}
|
|
|
|
// filter with must-not-match
|
|
if ((entry.depth() > 0) && profile.mustNotMatchPattern().matcher(entry.url().toString()).matches()) {
|
|
reason = "url matches must-not-match filter";
|
|
if (this.log.isFine()) this.log.logFine("URL '" + entry.url().toString() + "' does matches do-not-match crawling filter '" + profile.mustNotMatchPattern().toString() + "'. " +
|
|
"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
|
|
return reason;
|
|
}
|
|
|
|
// deny cgi
|
|
if (entry.url().isCGI()) {
|
|
reason = "cgi url not allowed";
|
|
|
|
if (this.log.isFine()) this.log.logFine("URL '" + entry.url().toString() + "' is CGI URL. " +
|
|
"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
|
|
return reason;
|
|
}
|
|
|
|
// deny post properties
|
|
if (entry.url().isPOST() && !(profile.crawlingQ())) {
|
|
reason = "post url not allowed";
|
|
|
|
if (this.log.isFine()) this.log.logFine("URL '" + entry.url().toString() + "' is post URL. " +
|
|
"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
|
|
return reason;
|
|
}
|
|
|
|
final yacyURL referrerURL = (entry.referrerhash() == null) ? null : nextQueue.getURL(entry.referrerhash());
|
|
|
|
// add domain to profile domain list
|
|
if ((profile.domFilterDepth() != Integer.MAX_VALUE) || (profile.domMaxPages() != Integer.MAX_VALUE)) {
|
|
profile.domInc(entry.url().getHost(), (referrerURL == null) ? null : referrerURL.getHost().toLowerCase(), entry.depth());
|
|
}
|
|
|
|
// deny urls that do not match with the profile domain list
|
|
if (!(profile.grantedDomAppearance(entry.url().getHost()))) {
|
|
reason = "url does not match domain filter";
|
|
if (this.log.isFine()) this.log.logFine("URL '" + entry.url().toString() + "' is not listed in granted domains. " +
|
|
"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
|
|
return reason;
|
|
}
|
|
|
|
// deny urls that exceed allowed number of occurrences
|
|
if (!(profile.grantedDomCount(entry.url().getHost()))) {
|
|
reason = "domain counter exceeded";
|
|
if (this.log.isFine()) this.log.logFine("URL '" + entry.url().toString() + "' appeared too often, a maximum of " + profile.domMaxPages() + " is allowed. "+
|
|
"Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
|
|
return reason;
|
|
}
|
|
|
|
// check if the url is double registered
|
|
final String dbocc = nextQueue.urlExists(entry.url().hash());
|
|
if (dbocc != null || wordIndex.existsURL(entry.url().hash())) {
|
|
final indexURLReference oldEntry = wordIndex.getURL(entry.url().hash(), null, 0);
|
|
final boolean recrawl = (oldEntry != null) && (profile.recrawlIfOlder() > oldEntry.loaddate().getTime());
|
|
// do double-check
|
|
if ((dbocc != null) && (!recrawl)) {
|
|
reason = "double " + dbocc + ")";
|
|
if (this.log.isFine()) this.log.logFine("URL '" + entry.url().toString() + "' is double registered in '" + dbocc + "'. " + "Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
|
|
return reason;
|
|
}
|
|
if ((oldEntry != null) && (!recrawl)) {
|
|
reason = "double " + "LURL)";
|
|
if (this.log.isFine()) this.log.logFine("URL '" + entry.url().toString() + "' is double registered in 'LURL'. " + "Stack processing time: " + (System.currentTimeMillis()-startTime) + "ms");
|
|
return reason;
|
|
}
|
|
|
|
// show potential re-crawl
|
|
if (recrawl && oldEntry != null) {
|
|
if (this.log.isFine()) this.log.logFine("RE-CRAWL of URL '" + entry.url().toString() + "': this url was crawled " +
|
|
((System.currentTimeMillis() - oldEntry.loaddate().getTime()) / 60000 / 60 / 24) + " days ago.");
|
|
}
|
|
}
|
|
|
|
// store information
|
|
final boolean local = entry.initiator().equals(wordIndex.seedDB.mySeed().hash);
|
|
final boolean proxy = (entry.initiator() == null || entry.initiator().equals("------------")) && profile.handle().equals(wordIndex.defaultProxyProfile.handle());
|
|
final boolean remote = profile.handle().equals(wordIndex.defaultRemoteProfile.handle());
|
|
final boolean global =
|
|
(profile.remoteIndexing()) /* granted */ &&
|
|
(entry.depth() == profile.depth()) /* leaf node */ &&
|
|
//(initiatorHash.equals(yacyCore.seedDB.mySeed.hash)) /* not proxy */ &&
|
|
(
|
|
(wordIndex.seedDB.mySeed().isSenior()) ||
|
|
(wordIndex.seedDB.mySeed().isPrincipal())
|
|
) /* qualified */;
|
|
|
|
if (!local && !global && !remote && !proxy) {
|
|
this.log.logSevere("URL '" + entry.url().toString() + "' cannot be crawled. initiator = " + entry.initiator() + ", profile.handle = " + profile.handle());
|
|
} else {
|
|
if (global) {
|
|
// it may be possible that global == true and local == true, so do not check an error case against it
|
|
if (proxy) this.log.logWarning("URL '" + entry.url().toString() + "' has conflicting initiator properties: global = true, proxy = true, initiator = " + entry.initiator() + ", profile.handle = " + profile.handle());
|
|
if (remote) this.log.logWarning("URL '" + entry.url().toString() + "' has conflicting initiator properties: global = true, remote = true, initiator = " + entry.initiator() + ", profile.handle = " + profile.handle());
|
|
nextQueue.noticeURL.push(NoticedURL.STACK_TYPE_LIMIT, entry);
|
|
} else if (local) {
|
|
if (proxy) this.log.logWarning("URL '" + entry.url().toString() + "' has conflicting initiator properties: local = true, proxy = true, initiator = " + entry.initiator() + ", profile.handle = " + profile.handle());
|
|
if (remote) this.log.logWarning("URL '" + entry.url().toString() + "' has conflicting initiator properties: local = true, remote = true, initiator = " + entry.initiator() + ", profile.handle = " + profile.handle());
|
|
nextQueue.noticeURL.push(NoticedURL.STACK_TYPE_CORE, entry);
|
|
} else if (proxy) {
|
|
if (remote) this.log.logWarning("URL '" + entry.url().toString() + "' has conflicting initiator properties: proxy = true, remote = true, initiator = " + entry.initiator() + ", profile.handle = " + profile.handle());
|
|
nextQueue.noticeURL.push(NoticedURL.STACK_TYPE_CORE, entry);
|
|
} else if (remote) {
|
|
nextQueue.noticeURL.push(NoticedURL.STACK_TYPE_REMOTE, entry);
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
|
|
/**
|
|
* Test a url if it can be used for crawling/indexing
|
|
* This mainly checks if the url is in the declared domain (local/global)
|
|
* @param url
|
|
* @return null if the url can be accepted, a string containing a rejection reason if the url cannot be accepted
|
|
*/
|
|
public String urlInAcceptedDomain(final yacyURL url) {
|
|
// returns true if the url can be accepted accoring to network.unit.domain
|
|
if (url == null) return "url is null";
|
|
final String host = url.getHost();
|
|
if (host == null) return "url.host is null";
|
|
if (this.acceptGlobalURLs && this.acceptLocalURLs) return null; // fast shortcut to avoid dnsResolve
|
|
/*
|
|
InetAddress hostAddress = serverDomains.dnsResolve(host);
|
|
// if we don't know the host, we cannot load that resource anyway.
|
|
// But in case we use a proxy, it is possible that we dont have a DNS service.
|
|
final httpRemoteProxyConfig remoteProxyConfig = httpdProxyHandler.getRemoteProxyConfig();
|
|
if (hostAddress == null) {
|
|
if ((remoteProxyConfig != null) && (remoteProxyConfig.useProxy())) return null; else return "the dns of the host '" + host + "' cannot be resolved";
|
|
}
|
|
*/
|
|
// check if this is a local address and we are allowed to index local pages:
|
|
//boolean local = hostAddress.isSiteLocalAddress() || hostAddress.isLoopbackAddress();
|
|
final boolean local = url.isLocal();
|
|
//assert local == yacyURL.isLocalDomain(url.hash()); // TODO: remove the dnsResolve above!
|
|
if ((this.acceptGlobalURLs && !local) || (this.acceptLocalURLs && local)) return null;
|
|
return (local) ?
|
|
("the host '" + host + "' is local, but local addresses are not accepted") :
|
|
("the host '" + host + "' is global, but global addresses are not accepted");
|
|
}
|
|
|
|
public boolean acceptLocalURLs() {
|
|
return this.acceptLocalURLs;
|
|
}
|
|
|
|
public boolean acceptGlobalURLs() {
|
|
return this.acceptGlobalURLs;
|
|
}
|
|
}
|