httprecordermethod.java

这是个爬虫和lucece相结合最好了

/* HttpRecorderMethod
 *
 * Created on August 22, 2004
 *
 * Copyright (C) 2003 Internet Archive.
 *
 * This file is part of the Heritrix web crawler (crawler.archive.org).
 *
 * Heritrix is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * any later version.
 *
 * Heritrix is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser Public License
 * along with Heritrix; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package org.archive.httpclient;

import java.util.logging.Logger;

import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpConnection;
import org.apache.commons.httpclient.HttpMethod;
import org.archive.util.HttpRecorder;


/**
 * This class encapsulates the specializations supplied by the
 * overrides {@link HttpRecorderGetMethod} and {@link HttpRecorderPostMethod}.
 * 
 * It keeps instance of HttpRecorder and HttpConnection.
 *
 * @author stack
 * @version $Revision: 3351 $, $Date: 2005-04-07 21:44:47 +0000 (Thu, 07 Apr 2005) $
 */
public class HttpRecorderMethod {
    protected static Logger logger =
        Logger.getLogger(HttpRecorderMethod.class.getName());
    
    /**
     * Instance of http recorder we're using recording this http get.
     */
    private HttpRecorder httpRecorder = null;

    /**
     * Save around so can force close.
     *
     * See [ 922080 ] IllegalArgumentException (size is wrong).
     * https://sourceforge.net/tracker/?func=detail&aid=922080&group_id=73833&atid=539099
     */
    private HttpConnection connection = null;
    

	public HttpRecorderMethod(HttpRecorder recorder) {
        this.httpRecorder = recorder;
	}

	public void markContentBegin(HttpConnection c) {
        if (c != this.connection) {
            // We're checking that we're not being asked to work on
            // a connection that is other than the one we started
            // this method#execute with.
            throw new IllegalArgumentException("Connections differ: " +
                this.connection + " " + c + " " +
                Thread.currentThread().getName());
        }
		this.httpRecorder.markContentBegin();
	}
    
    /**
     * @return Returns the connection.
     */
    public HttpConnection getConnection() {
        return this.connection;
    }
    
    /**
     * @param connection The connection to set.
     */
    public void setConnection(HttpConnection connection) {
        this.connection = connection;
    }
    /**
     * @return Returns the httpRecorder.
     */
    public HttpRecorder getHttpRecorder() {
        return httpRecorder;
    }

    /**
     * If a 'Proxy-Connection' header has been added to the request,
     * it'll be of a 'keep-alive' type.  Until we support 'keep-alives',
     * override the Proxy-Connection setting and instead pass a 'close'
     * (Otherwise every request has to timeout before we notice
     * end-of-document).
     * @param method Method to find proxy-connection header in.
     */
    public void handleAddProxyConnectionHeader(HttpMethod method) {
        Header h = method.getRequestHeader("Proxy-Connection");
        if (h != null) {
            h.setValue("close");
            method.setRequestHeader(h);
        }
    }
}