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
449 lines
20 KiB
Java
449 lines
20 KiB
Java
//icapd.java
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//-----------------------
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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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//This file is contributed by Martin Thelian
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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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//
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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.icap;
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import java.io.BufferedOutputStream;
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import java.io.BufferedReader;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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import java.net.InetAddress;
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import java.util.Date;
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import java.util.Properties;
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import de.anomic.http.httpChunkedInputStream;
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import de.anomic.http.httpHeader;
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import de.anomic.http.httpc;
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import de.anomic.plasma.plasmaHTCache;
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import de.anomic.plasma.plasmaParser;
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import de.anomic.plasma.plasmaSwitchboard;
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import de.anomic.plasma.cache.IResourceInfo;
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import de.anomic.plasma.cache.http.ResourceInfo;
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import de.anomic.server.serverCore;
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import de.anomic.server.serverFileUtils;
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import de.anomic.server.serverHandler;
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import de.anomic.server.logging.serverLog;
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import de.anomic.server.serverCore.Session;
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import de.anomic.yacy.yacyURL;
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/**
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* @author theli
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*/
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public class icapd implements serverHandler {
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private serverCore.Session session; // holds the session object of the calling class
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// the connection properties
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private final Properties prop = new Properties();
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// the address of the client
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private InetAddress userAddress;
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private String clientIP;
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private int keepAliveRequestCount = 0;
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// needed for logging
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private final serverLog log = new serverLog("ICAPD");
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private static plasmaSwitchboard switchboard = null;
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private static String virtualHost = null;
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private static boolean keepAliveSupport = true;
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public icapd() {
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if (switchboard == null) {
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switchboard = plasmaSwitchboard.getSwitchboard();
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virtualHost = switchboard.getConfig("fileHost","localhost");
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}
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}
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public Object clone(){
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return new icapd();
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}
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public void initSession(Session session) throws IOException {
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this.session = session;
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this.userAddress = session.userAddress; // client InetAddress
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this.clientIP = this.userAddress.getHostAddress();
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if (this.userAddress.isAnyLocalAddress()) this.clientIP = "localhost";
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if (this.clientIP.equals("0:0:0:0:0:0:0:1")) this.clientIP = "localhost";
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if (this.clientIP.equals("127.0.0.1")) this.clientIP = "localhost";
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}
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public String greeting() {
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// TODO Auto-generated method stub
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return null;
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}
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public String error(Throwable e) {
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// TODO Auto-generated method stub
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return null;
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}
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public void reset() {
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}
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public Boolean EMPTY(String arg) throws IOException {
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// TODO Auto-generated method stub
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return serverCore.TERMINATE_CONNECTION;
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}
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public Boolean UNKNOWN(String requestLine) throws IOException {
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// TODO Auto-generated method stub
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return serverCore.TERMINATE_CONNECTION;
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}
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public icapHeader getDefaultHeaders() {
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icapHeader newHeaders = new icapHeader();
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newHeaders.put(icapHeader.SERVER,"YaCy/" + switchboard.getConfig("vString",""));
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newHeaders.put(icapHeader.DATE, httpc.dateString(httpc.nowDate()));
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newHeaders.put(icapHeader.ISTAG, "\"" + switchboard.getConfig("vString","") + "\"");
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return newHeaders;
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}
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public Boolean OPTIONS(String arg) throws IOException {
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BufferedOutputStream out = new BufferedOutputStream(this.session.out);
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// parsing the http request line
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parseRequestLine(icapHeader.METHOD_OPTIONS,arg);
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// reading the headers
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icapHeader icapReqHeader = icapHeader.readHeader(this.prop,this.session);
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// determines if the connection should be kept alive
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boolean persistent = handlePersistentConnection(icapReqHeader);
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// setting the icap response headers
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icapHeader resHeader = getDefaultHeaders();
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resHeader.put(icapHeader.ALLOW,"204");
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resHeader.put(icapHeader.ENCAPSULATED,"null-body=0");
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resHeader.put(icapHeader.MAX_CONNECTIONS,"1000");
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resHeader.put(icapHeader.OPTIONS_TTL,"300");
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resHeader.put(icapHeader.SERVICE_ID, "???");
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resHeader.put(icapHeader.PREVIEW, "30");
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resHeader.put(icapHeader.TRANSFER_COMPLETE, "*");
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//resHeader.put(icapHeader.TRANSFER_PREVIEW, "*");
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if (!persistent) resHeader.put(icapHeader.CONNECTION, "close");
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// determining the requested service and call it or send back an error message
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String reqService = this.prop.getProperty(icapHeader.CONNECTION_PROP_PATH,"");
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if (reqService.equalsIgnoreCase("/resIndexing")) {
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resHeader.put(icapHeader.SERVICE, "YaCy ICAP Indexing Service 1.0");
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resHeader.put(icapHeader.METHODS,icapHeader.METHOD_RESPMOD);
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String transferIgnoreList = plasmaParser.getMediaExtList();
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transferIgnoreList = transferIgnoreList.substring(1,transferIgnoreList.length()-1);
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resHeader.put(icapHeader.TRANSFER_IGNORE, transferIgnoreList);
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} else {
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resHeader.put(icapHeader.SERVICE, "YaCy ICAP Service 1.0");
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}
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StringBuffer headerStringBuffer = resHeader.toHeaderString("ICAP/1.0",200,null);
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out.write(headerStringBuffer.toString().getBytes());
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out.flush();
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return this.prop.getProperty(icapHeader.CONNECTION_PROP_PERSISTENT).equals("keep-alive") ? serverCore.RESUME_CONNECTION : serverCore.TERMINATE_CONNECTION;
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}
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public Boolean REQMOD(String arg) {
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return serverCore.TERMINATE_CONNECTION;
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}
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public Boolean RESPMOD(String arg) {
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try {
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InputStream in = this.session.in;
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OutputStream out = this.session.out;
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// parsing the icap request line
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parseRequestLine(icapHeader.METHOD_RESPMOD,arg);
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// reading the icap request header
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icapHeader icapReqHeader = icapHeader.readHeader(this.prop,this.session);
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// determines if the connection should be kept alive
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handlePersistentConnection(icapReqHeader);
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// determining the requested service and call it or send back an error message
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String reqService = this.prop.getProperty(icapHeader.CONNECTION_PROP_PATH,"");
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if (reqService.equalsIgnoreCase("/resIndexing")) {
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indexingService(icapReqHeader,in,out);
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} else {
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icapHeader icapResHeader = getDefaultHeaders();
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icapResHeader.put(icapHeader.ENCAPSULATED,icapReqHeader.get(icapHeader.ENCAPSULATED));
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icapResHeader.put(icapHeader.SERVICE, "YaCy ICAP Service 1.0");
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// icapResHeader.put(icapHeader.CONNECTION, "close");
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StringBuffer headerStringBuffer = icapResHeader.toHeaderString("ICAP/1.0",404,null);
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out.write((new String(headerStringBuffer)).getBytes());
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out.flush();
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}
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} catch (Exception e) {
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e.printStackTrace();
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} finally {
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}
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return this.prop.getProperty(icapHeader.CONNECTION_PROP_PERSISTENT).equals("keep-alive") ? serverCore.RESUME_CONNECTION : serverCore.TERMINATE_CONNECTION;
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}
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/*
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private void blacklistService(icapHeader reqHeader, InputStream in, OutputStream out) {
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try {
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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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*/
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private void indexingService(icapHeader reqHeader, InputStream in, OutputStream out) {
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try {
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/* =========================================================================
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* Reading the various message parts into buffers
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* ========================================================================= */
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ByteArrayInputStream reqHdrStream = null, resHdrStream = null, resBodyStream = null;
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String[] encapsulated = ((String) reqHeader.get(icapHeader.ENCAPSULATED)).split(",");
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int prevLength = 0, currLength=0;
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for (int i=0; i < encapsulated.length; i++) {
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// reading the request header
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if (encapsulated[i].indexOf("req-hdr")>=0) {
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prevLength = currLength;
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currLength = Integer.parseInt(encapsulated[i+1].split("=")[1]);
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byte[] buffer = new byte[currLength-prevLength];
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in.read(buffer, 0, buffer.length);
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reqHdrStream = new ByteArrayInputStream(buffer);
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// reading the response header
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} else if (encapsulated[i].indexOf("res-hdr")>=0) {
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prevLength = currLength;
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currLength = Integer.parseInt(encapsulated[i+1].split("=")[1]);
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byte[] buffer = new byte[currLength-prevLength];
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in.read(buffer, 0, buffer.length);
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resHdrStream = new ByteArrayInputStream(buffer);
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// reading the response body
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} else if (encapsulated[i].indexOf("res-body")>=0) {
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httpChunkedInputStream chunkedIn = new httpChunkedInputStream(in);
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ByteArrayOutputStream bout = new ByteArrayOutputStream();
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int l = 0,len = 0;
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byte[] buffer = new byte[2048];
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while ((l = chunkedIn.read(buffer)) >= 0) {
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len += l;
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bout.write(buffer,0,l);
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}
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resBodyStream = new ByteArrayInputStream(bout.toByteArray());
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}
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}
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/* =========================================================================
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* sending back the icap status
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* ========================================================================= */
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icapHeader icapResHeader = getDefaultHeaders();
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if (reqHeader.allow(204)) {
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icapResHeader.put(icapHeader.ENCAPSULATED,reqHeader.get(icapHeader.ENCAPSULATED));
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icapResHeader.put(icapHeader.SERVICE, "YaCy ICAP Service 1.0");
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// resHeader.put(icapHeader.CONNECTION, "close");
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StringBuffer headerStringBuffer = icapResHeader.toHeaderString("ICAP/1.0",204,null);
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out.write((new String(headerStringBuffer)).getBytes());
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out.flush();
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} else {
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icapResHeader.put(icapHeader.ENCAPSULATED,reqHeader.get(icapHeader.ENCAPSULATED));
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icapResHeader.put(icapHeader.SERVICE, "YaCy ICAP Service 1.0");
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// icapResHeader.put(icapHeader.CONNECTION, "close");
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StringBuffer headerStringBuffer = icapResHeader.toHeaderString("ICAP/1.0",503,null);
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out.write((new String(headerStringBuffer)).getBytes());
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out.flush();
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}
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/* =========================================================================
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* Parsing request data
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* ========================================================================= */
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// reading the requestline
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BufferedReader reader = new BufferedReader(new InputStreamReader(reqHdrStream));
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String httpRequestLine = reader.readLine();
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// parsing the requestline
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Properties httpReqProps = new Properties();
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httpHeader.parseRequestLine(httpRequestLine,httpReqProps,virtualHost);
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if (!httpReqProps.getProperty(httpHeader.CONNECTION_PROP_METHOD).equals(httpHeader.METHOD_GET)) {
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this.log.logInfo("Wrong http request method for indexing:" +
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"\nRequest Method: " + httpReqProps.getProperty(httpHeader.CONNECTION_PROP_METHOD) +
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"\nRequest Line: " + httpRequestLine);
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reader.close();
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reqHdrStream.close();
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return;
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}
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// reading all request headers
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httpHeader httpReqHeader = httpHeader.readHttpHeader(reader);
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reader.close();
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reqHdrStream.close();
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// handle transparent proxy support: this function call is needed to set the host property properly
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httpHeader.handleTransparentProxySupport(httpReqHeader,httpReqProps,virtualHost,true);
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// getting the request URL
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yacyURL httpRequestURL = httpHeader.getRequestURL(httpReqProps);
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/* =========================================================================
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* Parsing response data
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* ========================================================================= */
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// getting the response status
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reader = new BufferedReader(new InputStreamReader(resHdrStream));
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String httpRespStatusLine = reader.readLine();
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Object[] httpRespStatus = httpHeader.parseResponseLine(httpRespStatusLine);
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if (!(httpRespStatus[1].equals(new Integer(200)) || httpRespStatus[1].equals(new Integer(203)))) {
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this.log.logInfo("Wrong status code for indexing:" +
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"\nStatus Code: " + httpRespStatus[1] +
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"\nRequest Line: " + httpRequestLine +
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"\nResponse Line: " + httpRespStatusLine);
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reader.close();
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resHdrStream.close();
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return;
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}
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// reading all response headers
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httpHeader httpResHeader = httpHeader.readHttpHeader(reader);
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reader.close();
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resHdrStream.close();
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if (!plasmaParser.supportedContent(plasmaParser.PARSER_MODE_ICAP, httpRequestURL, httpResHeader.mime())) {
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this.log.logInfo("Wrong mimeType or fileExtension for indexing:" +
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"\nMimeType: " + httpResHeader.mime() +
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"\nRequest Line:" + httpRequestLine);
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return ;
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}
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/* =========================================================================
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* Prepare data for indexing
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* ========================================================================= */
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// generating a htcache entry object
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IResourceInfo resInfo = new ResourceInfo(httpRequestURL,httpReqHeader,httpResHeader);
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plasmaHTCache.Entry cacheEntry = plasmaHTCache.newEntry(
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new Date(),
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0,
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httpRequestURL,
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"",
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httpRespStatusLine,
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resInfo,
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null,
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switchboard.defaultProxyProfile
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);
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// getting the filename/path to store the response body
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File cacheFile = plasmaHTCache.getCachePath(httpRequestURL);
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// if the file already exits we delete it
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if (cacheFile.isFile()) {
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plasmaHTCache.deleteURLfromCache(httpRequestURL);
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}
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// we write the new cache entry to file system directly
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cacheFile.getParentFile().mkdirs();
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// copy the response body into the file
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serverFileUtils.copy(resBodyStream,cacheFile);
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resBodyStream.close(); resBodyStream = null;
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// indexing the response
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plasmaHTCache.push(cacheEntry);
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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 final void parseRequestLine(String cmd, String s) {
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// parsing the requestlin
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icapHeader.parseRequestLine(cmd,s, this.prop,virtualHost);
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// adding the client ip prop
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this.prop.setProperty(icapHeader.CONNECTION_PROP_CLIENTIP, this.clientIP);
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// counting the amount of received requests within this permanent conneciton
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this.prop.setProperty(icapHeader.CONNECTION_PROP_KEEP_ALIVE_COUNT, Integer.toString(++this.keepAliveRequestCount));
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}
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private boolean handlePersistentConnection(icapHeader header) {
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if (!keepAliveSupport) {
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this.prop.put(icapHeader.CONNECTION_PROP_PERSISTENT,"close");
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return false;
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}
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boolean persistent = true;
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if (((String)header.get(icapHeader.CONNECTION, "keep-alive")).toLowerCase().equals("close")) {
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persistent = false;
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}
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this.prop.put(icapHeader.CONNECTION_PROP_PERSISTENT,persistent?"keep-alive":"close");
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return persistent;
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}
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}
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