mirror of
https://github.com/yacy/yacy_search_server.git
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a31b9097a4
two main changes must be implemented to enable mass remote crawls: - shift control of robots.txt to crawl queue (away from stacker). This is necessary since remote crawls can contain unchecked urls. Each peer must check the robots to prevent that it is misused as crawl agent for unwanted file retrieval - implement new index files that control double-check of remotely crawled urls After removal of robots.txt checking from stacker threads, the multi-threading of this process is void. Multithreading has been removed. Also the thread pools for the crawl threads had been removed, since creation of these threads is not resource-consuming, for a detailed explanation see svn 4106 git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4181 6c8d7289-2bf4-0310-a012-ef5d649a1542
185 lines
8.3 KiB
Java
185 lines
8.3 KiB
Java
// crawlReceipt.java
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// -----------------------
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// part of the AnomicHTTPD caching proxy
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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, 2004
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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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//
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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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// You must compile this file with
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// javac -classpath .:../classes crawlOrder.java
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import java.io.IOException;
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import de.anomic.http.httpHeader;
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import de.anomic.index.indexURLEntry;
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import de.anomic.plasma.plasmaCrawlZURL;
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import de.anomic.plasma.plasmaSwitchboard;
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import de.anomic.server.serverObjects;
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import de.anomic.server.serverSwitch;
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import de.anomic.server.logging.serverLog;
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import de.anomic.tools.crypt;
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import de.anomic.yacy.yacyCore;
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import de.anomic.yacy.yacyNetwork;
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import de.anomic.yacy.yacySeed;
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public final class crawlReceipt {
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/*
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* this is used to respond on a remote crawling request
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*/
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public static serverObjects respond(httpHeader header, serverObjects post, serverSwitch env) {
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// return variable that accumulates replacements
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plasmaSwitchboard switchboard = (plasmaSwitchboard) env;
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serverObjects prop = new serverObjects();
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if ((post == null) || (env == null)) return prop;
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if (!yacyNetwork.authentifyRequest(post, env)) return prop;
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serverLog log = switchboard.getLog();
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//int proxyPrefetchDepth = Integer.parseInt(env.getConfig("proxyPrefetchDepth", "0"));
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//int crawlingDepth = Integer.parseInt(env.getConfig("crawlingDepth", "0"));
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// request values
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String iam = post.get("iam", ""); // seed hash of requester
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String youare = post.get("youare", ""); // seed hash of the target peer, needed for network stability
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//String process = post.get("process", ""); // process type
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String key = post.get("key", ""); // transmission key
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//String receivedUrlhash = post.get("urlhash", ""); // the url hash that has been crawled
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String result = post.get("result", ""); // the result; either "ok" or "fail"
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String reason = post.get("reason", ""); // the reason for that result
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//String words = post.get("wordh", ""); // priority word hashes
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String propStr = crypt.simpleDecode(post.get("lurlEntry", ""), key);
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/*
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the result can have one of the following values:
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negative cases, no retry
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unavailable - the resource is not available (a broken link); not found or interrupted
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exception - an exception occurred
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robot - a robot-file has denied to crawl that resource
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negative cases, retry possible
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rejected - the peer has rejected to load the resource
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dequeue - peer too busy - rejected to crawl
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positive cases with crawling
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fill - the resource was loaded and processed
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update - the resource was already in database but re-loaded and processed
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positive cases without crawling
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known - the resource is already in database, believed to be fresh and not reloaded
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stale - the resource was reloaded but not processed because source had no changes
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*/
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final yacySeed otherPeer = yacyCore.seedDB.get(iam);
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final String otherPeerName = iam + ":" + ((otherPeer == null) ? "NULL" : (otherPeer.getName() + "/" + otherPeer.getVersion()));
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if ((yacyCore.seedDB.mySeed() == null) || (!(yacyCore.seedDB.mySeed().hash.equals(youare)))) {
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// no yacy connection / unknown peers
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prop.put("delay", "3600");
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return prop;
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}
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if (propStr == null) {
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// error with url / wrong key
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prop.put("delay", "3600");
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return prop;
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}
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if ((switchboard.isRobinsonMode()) && (!switchboard.isInMyCluster(otherPeer))) {
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// we reject urls that are from outside our cluster
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prop.put("delay", "9999");
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}
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// generating a new loaded URL entry
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indexURLEntry entry = switchboard.wordIndex.loadedURL.newEntry(propStr);
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if (entry == null) {
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log.logWarning("crawlReceipt: RECEIVED wrong RECEIPT (entry null) from peer " + iam + "\n\tURL properties: "+ propStr);
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prop.put("delay", "3600");
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return prop;
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}
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indexURLEntry.Components comp = entry.comp();
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if (comp.url() == null) {
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log.logWarning("crawlReceipt: RECEIVED wrong RECEIPT (url null) for hash " + entry.hash() + " from peer " + iam + "\n\tURL properties: "+ propStr);
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prop.put("delay", "3600");
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return prop;
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}
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// check if the entry is in our network domain
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if (!switchboard.acceptURL(comp.url())) {
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log.logWarning("crawlReceipt: RECEIVED wrong RECEIPT (url outside of our domain) for hash " + entry.hash() + " from peer " + iam + "\n\tURL properties: "+ propStr);
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prop.put("delay", "9999");
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return prop;
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}
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if (result.equals("fill")) try {
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// put new entry into database
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switchboard.wordIndex.loadedURL.store(entry);
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switchboard.wordIndex.loadedURL.stack(entry, youare, iam, 1);
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switchboard.crawlQueues.delegatedURL.remove(entry.hash()); // the delegated work has been done
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log.logInfo("crawlReceipt: RECEIVED RECEIPT from " + otherPeerName + " for URL " + entry.hash() + ":" + comp.url().toNormalform(false, true));
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// ready for more
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prop.put("delay", "10");
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return prop;
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} catch (IOException e) {
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e.printStackTrace();
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prop.put("delay", "3600");
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return prop;
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}
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switchboard.crawlQueues.delegatedURL.remove(entry.hash()); // the delegated work is transformed into an error case
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plasmaCrawlZURL.Entry ee = switchboard.crawlQueues.errorURL.newEntry(entry.toBalancerEntry(), youare, null, 0, result + ":" + reason);
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ee.store();
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switchboard.crawlQueues.errorURL.push(ee);
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//switchboard.noticeURL.remove(receivedUrlhash);
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prop.put("delay", "3600");
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return prop;
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// return rewrite properties
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}
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}
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