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434 lines
19 KiB
434 lines
19 KiB
//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.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.kelondro.text.Document;
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import de.anomic.kelondro.util.DateFormatter;
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import de.anomic.kelondro.util.Log;
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import de.anomic.kelondro.util.FileUtils;
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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.serverHandler;
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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 static final Log log = new Log("ICAPD");
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private static plasmaSwitchboard sb = 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 (sb == null) {
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sb = plasmaSwitchboard.getSwitchboard();
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virtualHost = sb.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/" + sb.getConfig("vString",""));
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newHeaders.put(icapHeader.DATE, DateFormatter.formatRFC1123(new Date()));
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newHeaders.put(icapHeader.ISTAG, "\"" + sb.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 StringBuilder header = resHeader.toHeaderString("ICAP/1.0",200,null);
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out.write(header.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 StringBuilder header = icapResHeader.toHeaderString("ICAP/1.0",404,null);
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out.write((new String(header)).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 StringBuilder header = icapResHeader.toHeaderString("ICAP/1.0",204,null);
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out.write((new String(header)).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 StringBuilder header = icapResHeader.toHeaderString("ICAP/1.0",503,null);
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out.write((new String(header)).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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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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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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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 Document 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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sb.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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FileUtils.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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sb.htEntryStoreProcess(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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