wireloginputstream.java

Light in the box 抓取程序。 使用HttpClient

/*
 * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//httpclient/src/java/org/apache/commons/httpclient/WireLogInputStream.java,v 1.15 2004/06/24 21:39:52 mbecke Exp $
 * $Revision: 480424 $
 * $Date: 2006-11-29 06:56:49 +0100 (Wed, 29 Nov 2006) $
 *
 * ====================================================================
 *
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package org.apache.commons.httpclient;

import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * Logs all data read to the wire LOG.
 *
 * @author Ortwin Gl�ck
 * @author <a href="mailto:[e-mail]">Mike Bowler</a>
 * @author <a href="mailto:[e-mail]">Oleg Kalnichevski</a>
 * 
 * @since 2.0
 */
class WireLogInputStream extends FilterInputStream {
     
    /** Original input stream. */
    private InputStream in;

    /** The wire log to use for writing. */
    private Wire wire;
    
    /**
     * Create an instance that wraps the specified input stream.
     * @param in The input stream.
     * @param wire The wire log to use.
     */
    public WireLogInputStream(InputStream in, Wire wire) {
        super(in);
        this.in = in;
        this.wire = wire;
    }
    /**
     * 
     * @see java.io.InputStream#read(byte[], int, int)
     */
    public int read(byte[] b, int off, int len) throws IOException {
        int l = this.in.read(b,  off,  len);
        if (l > 0) {
            wire.input(b, off, l);
        }
        return l;
    }

    /**
     * 
     * @see java.io.InputStream#read()
     */
    public int read() throws IOException {
        int l = this.in.read();
        if (l > 0) { 
            wire.input(l);
        }
        return l;
    }

    /**
     * 
     * @see java.io.InputStream#read(byte[])
     */
    public int read(byte[] b) throws IOException {
        int l = this.in.read(b);
        if (l > 0) {
            wire.input(b, 0, l);
        }
        return l;
    }
}