mirror of
https://github.com/yacy/yacy_search_server.git
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c83594528c
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@887 6c8d7289-2bf4-0310-a012-ef5d649a1542
546 lines
24 KiB
Java
546 lines
24 KiB
Java
// plasmaSwitchboard.java
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// -----------------------
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// part of YaCy
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// (C) by Michael Peter Christen; mc@anomic.de
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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 was contributed by Martin Thelian
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//
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// $LastChangedDate: 2005-10-07 15:49:07 +0200 (Fri, 07 Oct 2005) $
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// $LastChangedRevision: 874 $
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// $LastChangedBy: allo $
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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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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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package de.anomic.plasma;
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import java.io.File;
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import java.io.IOException;
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import java.net.InetAddress;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.net.UnknownHostException;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.Iterator;
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import java.util.LinkedList;
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import de.anomic.data.robotsParser;
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import de.anomic.kelondro.kelondroTree;
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import de.anomic.kelondro.kelondroRecords.Node;
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import de.anomic.server.serverCodings;
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import de.anomic.server.serverSemaphore;
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import de.anomic.server.logging.serverLog;
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import de.anomic.tools.bitfield;
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import de.anomic.yacy.yacyCore;
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public final class plasmaCrawlStacker {
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private final serverLog log = new serverLog("STACKCRAWL");
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private final plasmaSwitchboard sb;
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private boolean stopped = false;
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private stackCrawlQueue queue;
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public plasmaCrawlStacker(plasmaSwitchboard sb, File dbPath, int dbCacheSize) throws IOException {
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this.sb = sb;
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this.queue = new stackCrawlQueue(dbPath,dbCacheSize);
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this.log.logInfo(this.queue.size() + " entries in the stackCrawl queue.");
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this.log.logInfo("STACKCRAWL thread initialized.");
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}
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public int size() {
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return this.queue.size();
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}
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public void job() {
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try {
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// getting a new message from the crawler queue
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stackCrawlMessage theMsg = this.queue.waitForMessage();
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// process message
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String rejectReason = dequeue(theMsg);
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if (rejectReason != null) {
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this.sb.urlPool.errorURL.newEntry(
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new URL(theMsg.url()),
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theMsg.referrerHash(),
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theMsg.initiatorHash(),
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yacyCore.seedDB.mySeed.hash,
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theMsg.name,
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rejectReason,
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new bitfield(plasmaURL.urlFlagLength),
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false
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);
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}
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} catch (InterruptedException e) {
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Thread.interrupted();
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this.stopped = true;
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}
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catch (Exception e) {
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this.log.logSevere("plasmaStackCrawlThread.run/loop", e);
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}
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}
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public void enqueue(
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String nexturlString,
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String referrerString,
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String initiatorHash,
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String name,
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Date loadDate,
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int currentdepth,
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plasmaCrawlProfile.entry profile) throws MalformedURLException {
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try {
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this.queue.addMessage(new stackCrawlMessage(
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initiatorHash,
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nexturlString,
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referrerString,
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name,
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loadDate,
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profile.handle(),
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currentdepth,
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0,
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0
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));
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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private String dequeue(stackCrawlMessage theMsg) throws InterruptedException {
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plasmaCrawlProfile.entry profile = this.sb.profiles.getEntry(theMsg.profileHandle());
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if (profile == null) {
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String errorMsg = "LOST PROFILE HANDLE '" + theMsg.profileHandle() + "' (must be internal error) for URL " + theMsg.url();
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this.log.logSevere(errorMsg);
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throw new IllegalStateException(errorMsg);
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}
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return stackCrawl(
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theMsg.url().toString(),
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theMsg.referrerHash(),
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theMsg.initiatorHash(),
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theMsg.name(),
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theMsg.loaddate(),
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theMsg.depth(),
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profile);
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}
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public String stackCrawl(String nexturlString, String referrerString, String initiatorHash, String name, Date loadDate, int currentdepth, plasmaCrawlProfile.entry profile) {
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// stacks a crawl item. The position can also be remote
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// returns null if successful, a reason string if not successful
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String reason = null; // failure reason
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// strange errors
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if (nexturlString == null) {
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reason = "denied_(url_null)";
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this.log.logSevere("Wrong URL in stackCrawl: url=null");
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return reason;
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}
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/*
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if (profile == null) {
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reason = "denied_(profile_null)";
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log.logError("Wrong Profile for stackCrawl: profile=null");
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return reason;
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}
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*/
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URL nexturl = null;
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if ((initiatorHash == null) || (initiatorHash.length() == 0)) initiatorHash = plasmaURL.dummyHash;
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String referrerHash = plasmaURL.urlHash(referrerString);
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try {
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nexturl = new URL(nexturlString);
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} catch (MalformedURLException e) {
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reason = "denied_(url_'" + nexturlString + "'_wrong)";
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this.log.logSevere("Wrong URL in stackCrawl: " + nexturlString);
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return reason;
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}
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// check if ip is local ip address
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try {
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InetAddress hostAddress = InetAddress.getByName(nexturl.getHost());
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if (hostAddress.isSiteLocalAddress()) {
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reason = "denied_(private_ip_address)";
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this.log.logFine("Host in URL '" + nexturlString + "' has private ip address.");
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return reason;
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} else if (hostAddress.isLoopbackAddress()) {
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reason = "denied_(loopback_ip_address)";
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this.log.logFine("Host in URL '" + nexturlString + "' has loopback ip address.");
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return reason;
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}
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} catch (UnknownHostException e) {
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reason = "denied_(unknown_host)";
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this.log.logFine("Unknown host in URL '" + nexturlString + "'.");
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return reason;
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}
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// check blacklist
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String hostlow = nexturl.getHost().toLowerCase();
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if (plasmaSwitchboard.urlBlacklist.isListed(hostlow, nexturl.getPath())) {
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reason = "denied_(url_in_blacklist)";
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this.log.logFine("URL '" + nexturlString + "' is in blacklist.");
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return reason;
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}
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// filter deny
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if ((currentdepth > 0) && (profile != null) && (!(nexturlString.matches(profile.generalFilter())))) {
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reason = "denied_(does_not_match_filter)";
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/*
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urlPool.errorURL.newEntry(nexturl, referrerHash, initiatorHash, yacyCore.seedDB.mySeed.hash,
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name, reason, new bitfield(plasmaURL.urlFlagLength), false);*/
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this.log.logFine("URL '" + nexturlString + "' does not match crawling filter '" + profile.generalFilter() + "'.");
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return reason;
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}
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// deny cgi
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if (plasmaHTCache.isCGI(nexturlString)) {
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reason = "denied_(cgi_url)";
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/*
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urlPool.errorURL.newEntry(nexturl, referrerHash, initiatorHash, yacyCore.seedDB.mySeed.hash,
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name, reason, new bitfield(plasmaURL.urlFlagLength), false);*/
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this.log.logFine("URL '" + nexturlString + "' is cgi URL.");
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return reason;
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}
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// deny post properties
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if ((plasmaHTCache.isPOST(nexturlString)) && (profile != null) && (!(profile.crawlingQ()))) {
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reason = "denied_(post_url)";
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/*
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urlPool.errorURL.newEntry(nexturl, referrerHash, initiatorHash, yacyCore.seedDB.mySeed.hash,
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name, reason, new bitfield(plasmaURL.urlFlagLength), false);*/
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this.log.logFine("URL '" + nexturlString + "' is post URL.");
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return reason;
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}
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String nexturlhash = plasmaURL.urlHash(nexturl);
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String dbocc = "";
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if ((dbocc = this.sb.urlPool.exists(nexturlhash)) != null) {
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// DISTIGUISH OLD/RE-SEARCH CASES HERE!
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reason = "double_(registered_in_" + dbocc + ")";
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/*
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urlPool.errorURL.newEntry(nexturl, referrerHash, initiatorHash, yacyCore.seedDB.mySeed.hash,
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name, reason, new bitfield(plasmaURL.urlFlagLength), false);*/
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this.log.logFine("URL '" + nexturlString + "' is double registered in '" + dbocc + "'.");
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return reason;
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}
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// checking robots.txt
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if (robotsParser.isDisallowed(nexturl)) {
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reason = "denied_(robots.txt)";
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/*
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urlPool.errorURL.newEntry(nexturl, referrerHash, initiatorHash, yacyCore.seedDB.mySeed.hash,
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name, reason, new bitfield(plasmaURL.urlFlagLength), false);*/
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this.log.logFine("Crawling of URL '" + nexturlString + "' disallowed by robots.txt.");
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return reason;
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}
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// store information
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boolean local = ((initiatorHash.equals(plasmaURL.dummyHash)) || (initiatorHash.equals(yacyCore.seedDB.mySeed.hash)));
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boolean global =
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(profile != null) &&
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(profile.remoteIndexing()) /* granted */ &&
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(currentdepth == profile.generalDepth()) /* leaf node */ &&
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(initiatorHash.equals(yacyCore.seedDB.mySeed.hash)) /* not proxy */ &&
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((yacyCore.seedDB.mySeed.isSenior()) ||
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(yacyCore.seedDB.mySeed.isPrincipal())) /* qualified */;
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if ((!local)&&(!global)) {
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this.log.logFine("URL '" + nexturlString + "' can neither be crawled local nor global.");
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}
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this.sb.urlPool.noticeURL.newEntry(initiatorHash, /* initiator, needed for p2p-feedback */
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nexturl, /* url clear text string */
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loadDate, /* load date */
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referrerHash, /* last url in crawling queue */
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name, /* the anchor name */
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(profile == null) ? null : profile.handle(), // profile must not be null!
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currentdepth, /*depth so far*/
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0, /*anchors, default value */
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0, /*forkfactor, default value */
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((global) ? plasmaCrawlNURL.STACK_TYPE_LIMIT :
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((local) ? plasmaCrawlNURL.STACK_TYPE_CORE : plasmaCrawlNURL.STACK_TYPE_REMOTE)) /*local/remote stack*/
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);
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return null;
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}
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public final class stackCrawlMessage {
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private String initiator; // the initiator hash, is NULL or "" if it is the own proxy;
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String urlHash; // the url's hash
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private String referrerHash; // the url's referrer hash
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private String url; // the url as string
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String name; // the name of the url, from anchor tag <a>name</a>
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private Date loaddate; // the time when the url was first time appeared
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private String profileHandle; // the name of the prefetch profile
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private int depth; // the prefetch depth so far, starts at 0
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private int anchors; // number of anchors of the parent
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private int forkfactor; // sum of anchors of all ancestors
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private bitfield flags;
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private int handle;
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// loadParallel(URL url, String referer, String initiator, int depth, plasmaCrawlProfile.entry profile) {
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public stackCrawlMessage(
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String initiator,
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String urlString,
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String referrerUrlString,
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String name,
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Date loaddate,
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String profileHandle,
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int depth,
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int anchors,
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int forkfactor) {
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try {
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// create new entry and store it into database
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this.urlHash = plasmaURL.urlHash(urlString);
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this.initiator = initiator;
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this.url = urlString;
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this.referrerHash = (referrerUrlString == null) ? plasmaURL.dummyHash : plasmaURL.urlHash(referrerUrlString);
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this.name = (name == null) ? "" : name;
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this.loaddate = (loaddate == null) ? new Date() : loaddate;
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this.profileHandle = profileHandle; // must not be null
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this.depth = depth;
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this.anchors = anchors;
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this.forkfactor = forkfactor;
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this.flags = new bitfield(plasmaURL.urlFlagLength);
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this.handle = 0;
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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public stackCrawlMessage(String urlHash, byte[][] entryBytes) {
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if (urlHash == null) throw new NullPointerException();
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if (entryBytes == null) throw new NullPointerException();
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try {
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this.urlHash = urlHash;
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this.initiator = new String(entryBytes[1]);
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this.url = new String(entryBytes[2]).trim();
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this.referrerHash = (entryBytes[3]==null) ? plasmaURL.dummyHash : new String(entryBytes[3]);
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this.name = (entryBytes[4] == null) ? "" : new String(entryBytes[4]).trim();
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this.loaddate = new Date(86400000 * serverCodings.enhancedCoder.decodeBase64Long(new String(entryBytes[5])));
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this.profileHandle = (entryBytes[6] == null) ? null : new String(entryBytes[6]).trim();
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this.depth = (int) serverCodings.enhancedCoder.decodeBase64Long(new String(entryBytes[7]));
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this.anchors = (int) serverCodings.enhancedCoder.decodeBase64Long(new String(entryBytes[8]));
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this.forkfactor = (int) serverCodings.enhancedCoder.decodeBase64Long(new String(entryBytes[9]));
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this.flags = new bitfield(entryBytes[10]);
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this.handle = Integer.parseInt(new String(entryBytes[11]));
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} catch (Exception e) {
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e.printStackTrace();
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throw new IllegalStateException();
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}
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}
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public String url() {
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return this.url;
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}
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public String referrerHash() {
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return this.referrerHash;
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}
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public String initiatorHash() {
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if (this.initiator == null) return null;
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if (this.initiator.length() == 0) return null;
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return this.initiator;
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}
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public Date loaddate() {
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return this.loaddate;
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}
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public String name() {
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return this.name;
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}
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public int depth() {
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return this.depth;
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}
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public String profileHandle() {
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return this.profileHandle;
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}
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public String toString() {
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StringBuffer str = new StringBuffer();
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str.append("urlHash: ").append(urlHash==null ? "null" : urlHash).append(" | ")
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.append("initiator: ").append(initiator==null?"null":initiator).append(" | ")
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.append("url: ").append(url==null?"null":url).append(" | ")
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.append("referrer: ").append((referrerHash == null) ? plasmaURL.dummyHash : referrerHash).append(" | ")
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.append("name: ").append((name == null) ? "null" : name).append(" | ")
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.append("loaddate: ").append((loaddate == null) ? new Date() : loaddate).append(" | ")
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.append("profile: ").append(profileHandle==null?"null":profileHandle).append(" | ")
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.append("depth: ").append(Integer.toString(depth)).append(" | ")
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.append("forkfactor: ").append(Integer.toString(forkfactor)).append(" | ")
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.append("flags: ").append((flags==null) ? "null" : flags.toString());
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return str.toString();
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}
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public byte[][] getBytes() {
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// stores the values from the object variables into the database
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String loaddatestr = serverCodings.enhancedCoder.encodeBase64Long(loaddate.getTime() / 86400000, plasmaURL.urlDateLength);
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// store the hash in the hash cache
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// even if the entry exists, we simply overwrite it
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byte[][] entry = new byte[][] {
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this.urlHash.getBytes(),
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(this.initiator == null) ? "".getBytes() : this.initiator.getBytes(),
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this.url.getBytes(),
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this.referrerHash.getBytes(),
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this.name.getBytes(),
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loaddatestr.getBytes(),
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(this.profileHandle == null) ? null : this.profileHandle.getBytes(),
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serverCodings.enhancedCoder.encodeBase64Long(this.depth, plasmaURL.urlCrawlDepthLength).getBytes(),
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serverCodings.enhancedCoder.encodeBase64Long(this.anchors, plasmaURL.urlParentBranchesLength).getBytes(),
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serverCodings.enhancedCoder.encodeBase64Long(this.forkfactor, plasmaURL.urlForkFactorLength).getBytes(),
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this.flags.getBytes(),
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normalizeHandle(this.handle).getBytes()
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};
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return entry;
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}
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private String normalizeHandle(int h) {
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String d = Integer.toHexString(h);
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while (d.length() < plasmaURL.urlHandleLength) d = "0" + d;
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return d;
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}
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}
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final class stackCrawlQueue {
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private final serverSemaphore readSync;
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private final serverSemaphore writeSync;
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private final LinkedList urlEntryHashCache;
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private final kelondroTree urlEntryCache;
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public stackCrawlQueue(File cacheStacksPath, int bufferkb) throws IOException {
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// init the read semaphore
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this.readSync = new serverSemaphore (0);
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// init the write semaphore
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this.writeSync = new serverSemaphore (1);
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// init the message list
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this.urlEntryHashCache = new LinkedList();
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// create a stack for newly entered entries
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if (!(cacheStacksPath.exists())) cacheStacksPath.mkdir(); // make the path
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File cacheFile = new File(cacheStacksPath, "urlPreNotice.db");
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if (cacheFile.exists()) {
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// open existing cache
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this.urlEntryCache = new kelondroTree(cacheFile, bufferkb * 0x400);
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// loop through the list and fill the messageList with url hashs
|
|
Iterator iter = this.urlEntryCache.nodeIterator(true,false);
|
|
Node n;
|
|
while (iter.hasNext()) {
|
|
n = (Node) iter.next();
|
|
if (n == null) {
|
|
System.out.println("ERROR! null element found");
|
|
continue;
|
|
}
|
|
String urlHash = new String(n.getKey());
|
|
this.urlEntryHashCache.add(urlHash);
|
|
this.readSync.V();
|
|
}
|
|
} else {
|
|
// create new cache
|
|
cacheFile.getParentFile().mkdirs();
|
|
this.urlEntryCache = new kelondroTree(cacheFile, bufferkb * 0x400, plasmaCrawlNURL.ce);
|
|
}
|
|
}
|
|
|
|
public void close() throws IOException {
|
|
// closing the db
|
|
this.urlEntryCache.close();
|
|
|
|
// clearing the hash list
|
|
this.urlEntryHashCache.clear();
|
|
}
|
|
|
|
public void addMessage(stackCrawlMessage newMessage)
|
|
throws InterruptedException, IOException {
|
|
if (newMessage == null) throw new NullPointerException();
|
|
|
|
this.writeSync.P();
|
|
try {
|
|
|
|
boolean insertionDoneSuccessfully = false;
|
|
synchronized(this.urlEntryHashCache) {
|
|
byte[][] oldValue = this.urlEntryCache.put(newMessage.getBytes());
|
|
if (oldValue == null) {
|
|
insertionDoneSuccessfully = this.urlEntryHashCache.add(newMessage.urlHash);
|
|
}
|
|
}
|
|
|
|
if (insertionDoneSuccessfully) {
|
|
this.readSync.V();
|
|
}
|
|
} finally {
|
|
this.writeSync.V();
|
|
}
|
|
}
|
|
|
|
public int size() {
|
|
synchronized(this.urlEntryHashCache) {
|
|
return this.urlEntryHashCache.size();
|
|
}
|
|
}
|
|
|
|
public stackCrawlMessage waitForMessage() throws InterruptedException, IOException {
|
|
this.readSync.P();
|
|
this.writeSync.P();
|
|
|
|
String urlHash = null;
|
|
byte[][] entryBytes = null;
|
|
stackCrawlMessage newMessage = null;
|
|
synchronized(this.urlEntryHashCache) {
|
|
urlHash = (String) this.urlEntryHashCache.removeLast();
|
|
entryBytes = this.urlEntryCache.remove(urlHash.getBytes());
|
|
}
|
|
|
|
this.writeSync.V();
|
|
|
|
newMessage = new stackCrawlMessage(urlHash,entryBytes);
|
|
return newMessage;
|
|
}
|
|
}
|
|
|
|
}
|