mirror of
https://github.com/yacy/yacy_search_server.git
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826ca79735
- files are not stored any more as individual files - a new database structure using BLOBHeap files stores many cache entries in common files - all file-writing procedures had been migrated to generate byte[] objects which are written with the new database methods this is only an intermediate step to the final architecture, where cached files are written together with their metadata in one single database structure. git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@5276 6c8d7289-2bf4-0310-a012-ef5d649a1542
434 lines
19 KiB
Java
434 lines
19 KiB
Java
//icapd.java
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//-----------------------
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//(C) by Michael Peter Christen; mc@yacy.net
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//first published on http://www.anomic.de
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//Frankfurt, Germany, 2004
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//
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//This file is contributed by Martin Thelian
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//last major change: $LastChangedDate$ by $LastChangedBy$
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//Revision: $LastChangedRevision$
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//
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//This program is free software; you can redistribute it and/or modify
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//it under the terms of the GNU General Public License as published by
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//the Free Software Foundation; either version 2 of the License, or
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//(at your option) any later version.
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//
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//This program is distributed in the hope that it will be useful,
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//but WITHOUT ANY WARRANTY; without even the implied warranty of
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//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//GNU General Public License for more details.
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//
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//You should have received a copy of the GNU General Public License
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//along with this program; if not, write to the Free Software
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//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package de.anomic.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.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.HttpClient;
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import de.anomic.http.httpChunkedInputStream;
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import de.anomic.http.httpRequestHeader;
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import de.anomic.http.httpResponseHeader;
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import de.anomic.http.httpdProxyCacheEntry;
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import de.anomic.index.indexDocumentMetadata;
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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.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, Cloneable {
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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 icapd clone(){
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return new icapd();
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}
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public void initSession(final Session aSession) throws IOException {
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this.session = aSession;
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this.userAddress = aSession.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.startsWith("0:0:0:0:0:0:0:1")) this.clientIP = "localhost";
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if (this.clientIP.startsWith("127.")) 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(final 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(final 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(final 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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final icapHeader newHeaders = new icapHeader();
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newHeaders.put(icapHeader.SERVER,"YaCy/" + switchboard.getConfig("vString",""));
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newHeaders.put(icapHeader.DATE, HttpClient.dateString(new Date()));
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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(final String arg) throws IOException {
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final 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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final icapHeader icapReqHeader = icapHeader.readHeader(this.prop,this.session);
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// determines if the connection should be kept alive
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final boolean persistent = handlePersistentConnection(icapReqHeader);
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// setting the icap response headers
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final 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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final 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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final 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() {
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return serverCore.TERMINATE_CONNECTION;
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}
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public Boolean RESPMOD(final String arg) {
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try {
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final InputStream in = this.session.in;
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final 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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final 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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final 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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final 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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final 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 (final 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(final icapHeader reqHeader, final InputStream in, final 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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final String[] encapsulated = (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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final byte[] buffer = new byte[currLength-prevLength];
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final int bytesRead = in.read(buffer, 0, buffer.length);
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assert bytesRead == 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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final byte[] buffer = new byte[currLength-prevLength];
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final int bytesRead = in.read(buffer, 0, buffer.length);
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assert bytesRead == 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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final httpChunkedInputStream chunkedIn = new httpChunkedInputStream(in);
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final ByteArrayOutputStream bout = new ByteArrayOutputStream();
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int l = 0,len = 0;
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final 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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final 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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final 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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final 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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final String httpRequestLine = reader.readLine();
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// parsing the requestline
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final Properties httpReqProps = new Properties();
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httpRequestHeader.parseRequestLine(httpRequestLine,httpReqProps,virtualHost);
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if (!httpReqProps.getProperty(httpRequestHeader.CONNECTION_PROP_METHOD).equals(httpRequestHeader.METHOD_GET)) {
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this.log.logInfo("Wrong http request method for indexing:" +
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"\nRequest Method: " + httpReqProps.getProperty(httpRequestHeader.CONNECTION_PROP_METHOD) +
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"\nRequest Line: " + httpRequestLine);
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reader.close();
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if(reqHdrStream != null) {
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reqHdrStream.close();
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}
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return;
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}
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// reading all request headers
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final httpRequestHeader httpReqHeader = new httpRequestHeader();
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httpReqHeader.readHttpHeader(reader);
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reader.close();
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if(reqHdrStream != null) {
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reqHdrStream.close();
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}
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// handle transparent proxy support: this function call is needed to set the host property properly
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httpRequestHeader.handleTransparentProxySupport(httpReqHeader,httpReqProps,virtualHost,true);
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// getting the request URL
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final yacyURL httpRequestURL = httpRequestHeader.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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final String httpRespStatusLine = reader.readLine();
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final Object[] httpRespStatus = httpResponseHeader.parseResponseLine(httpRespStatusLine);
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if (!(httpRespStatus[1].equals(Integer.valueOf(200)) || httpRespStatus[1].equals(Integer.valueOf(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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if(resHdrStream != null) {
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resHdrStream.close();
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}
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return;
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}
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// reading all response headers
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final httpResponseHeader httpResHeader = new httpResponseHeader();
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httpResHeader.readHttpHeader(reader);
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reader.close();
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if(resHdrStream != null) {
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resHdrStream.close();
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}
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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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final indexDocumentMetadata cacheEntry = new httpdProxyCacheEntry(
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0,
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httpRequestURL,
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"",
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httpRespStatusLine,
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httpReqHeader, httpResHeader,
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null,
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switchboard.webIndex.defaultProxyProfile
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);
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// copy the response body into the file
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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serverFileUtils.copy(resBodyStream, baos);
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if(resBodyStream != null) {
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resBodyStream.close(); resBodyStream = null;
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}
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cacheEntry.setCacheArray(baos.toByteArray());
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plasmaHTCache.storeMetadata(httpResHeader, cacheEntry);
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// indexing the response
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plasmaHTCache.push(cacheEntry);
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} catch (final Exception e) {
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e.printStackTrace();
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}
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}
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private final void parseRequestLine(final String cmd, final 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(final 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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