httpstate.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/HttpState.java,v 1.38 2004/12/20 11:50:54 olegk Exp $
 * $Revision: 561099 $
 * $Date: 2007-07-30 21:41:17 +0200 (Mon, 30 Jul 2007) $
 *
 * ====================================================================
 *
 *  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.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.List;
import java.util.Iterator;
import org.apache.commons.httpclient.cookie.CookieSpec;
import org.apache.commons.httpclient.cookie.CookiePolicy;
import org.apache.commons.httpclient.auth.AuthScope; 
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * <p>
 * A container for HTTP attributes that may persist from request
 * to request, such as {@link Cookie cookies} and authentication
 * {@link Credentials credentials}.
 * </p>
 * 
 * @author <a href="mailto:[e-mail]">Remy Maucherat</a>
 * @author Rodney Waldhoff
 * @author <a href="mailto:[e-mail]">Jeff Dever</a>
 * @author Sean C. Sullivan
 * @author <a href="mailto:[e-mail]">Michael Becke</a>
 * @author <a href="mailto:[e-mail]">Oleg Kalnichevski</a>
 * @author <a href="mailto:[e-mail]">Mike Bowler</a>
 * @author <a href="mailto:[e-mail]">Adrian Sutton</a>
 * 
 * @version $Revision: 561099 $ $Date: 2007-07-30 21:41:17 +0200 (Mon, 30 Jul 2007) $
 * 
 */
public class HttpState {

    // ----------------------------------------------------- Instance Variables

    /**
     * Map of {@link Credentials credentials} by realm that this 
     * HTTP state contains.
     */
    protected HashMap credMap = new HashMap();

    /**
     * Map of {@link Credentials proxy credentials} by realm that this
     * HTTP state contains
     */
    protected HashMap proxyCred = new HashMap();

    /**
     * Array of {@link Cookie cookies} that this HTTP state contains.
     */
    protected ArrayList cookies = new ArrayList();

    private boolean preemptive = false;

    private int cookiePolicy = -1;
    // -------------------------------------------------------- Class Variables

    /**
     * The boolean system property name to turn on preemptive authentication.
     * @deprecated This field and feature will be removed following HttpClient 3.0.
     */
    public static final String PREEMPTIVE_PROPERTY = "httpclient.authentication.preemptive";

    /**
     * The default value for {@link #PREEMPTIVE_PROPERTY}.
     * @deprecated This field and feature will be removed following HttpClient 3.0.
     */
    public static final String PREEMPTIVE_DEFAULT = "false";
    
    /** Log object for this class. */
    private static final Log LOG = LogFactory.getLog(HttpState.class);

    /**
     * Default constructor.
     */
    public HttpState() {
        super();
    }

    // ------------------------------------------------------------- Properties

    /**
     * Adds an {@link Cookie HTTP cookie}, replacing any existing equivalent cookies.
     * If the given cookie has already expired it will not be added, but existing 
     * values will still be removed.
     * 
     * @param cookie the {@link Cookie cookie} to be added
     * 
     * @see #addCookies(Cookie[])
     * 
     */
    public synchronized void addCookie(Cookie cookie) {
        LOG.trace("enter HttpState.addCookie(Cookie)");

        if (cookie != null) {
            // first remove any old cookie that is equivalent
            for (Iterator it = cookies.iterator(); it.hasNext();) {
                Cookie tmp = (Cookie) it.next();
                if (cookie.equals(tmp)) {
                    it.remove();
                    break;
                }
            }
            if (!cookie.isExpired()) {
                cookies.add(cookie);
            }
        }
    }

    /**
     * Adds an array of {@link Cookie HTTP cookies}. Cookies are added individually and 
     * in the given array order. If any of the given cookies has already expired it will 
     * not be added, but existing values will still be removed.
     * 
     * @param cookies the {@link Cookie cookies} to be added
     * 
     * @see #addCookie(Cookie)
     * 
     * 
     */
    public synchronized void addCookies(Cookie[] cookies) {
        LOG.trace("enter HttpState.addCookies(Cookie[])");

        if (cookies != null) {
            for (int i = 0; i < cookies.length; i++) {
                this.addCookie(cookies[i]);
            }
        }
    }

    /**
     * Returns an array of {@link Cookie cookies} that this HTTP
     * state currently contains.
     * 
     * @return an array of {@link Cookie cookies}.
     * 
     * @see #getCookies(String, int, String, boolean)
     * 
     */
    public synchronized Cookie[] getCookies() {
        LOG.trace("enter HttpState.getCookies()");
        return (Cookie[]) (cookies.toArray(new Cookie[cookies.size()]));
    }

    /**
     * Returns an array of {@link Cookie cookies} in this HTTP 
     * state that match the given request parameters.
     * 
     * @param domain the request domain
     * @param port the request port
     * @param path the request path
     * @param secure <code>true</code> when using HTTPS
     * 
     * @return an array of {@link Cookie cookies}.
     * 
     * @see #getCookies()
     * 
     * @deprecated use CookieSpec#match(String, int, String, boolean, Cookie)
     */
    public synchronized Cookie[] getCookies(
        String domain, 
        int port, 
        String path, 
        boolean secure
    ) {
        LOG.trace("enter HttpState.getCookies(String, int, String, boolean)");

        CookieSpec matcher = CookiePolicy.getDefaultSpec();
        ArrayList list = new ArrayList(cookies.size());
        for (int i = 0, m = cookies.size(); i < m; i++) {
            Cookie cookie = (Cookie) (cookies.get(i));
            if (matcher.match(domain, port, path, secure, cookie)) {
                list.add(cookie);
            }
        }
        return (Cookie[]) (list.toArray(new Cookie[list.size()]));
    }

    /**
     * Removes all of {@link Cookie cookies} in this HTTP state
     * that have expired according to the current system time.
     * 
     * @see #purgeExpiredCookies(java.util.Date)
     * 
     */
    public synchronized boolean purgeExpiredCookies() {
        LOG.trace("enter HttpState.purgeExpiredCookies()");
        return purgeExpiredCookies(new Date());
    }

    /**
     * Removes all of {@link Cookie cookies} in this HTTP state
     * that have expired by the specified {@link java.util.Date date}. 
     * 
     * @param date The {@link java.util.Date date} to compare against.
     * 
     * @return true if any cookies were purged.
     * 
     * @see Cookie#isExpired(java.util.Date)
     * 
     * @see #purgeExpiredCookies()
     */
    public synchronized boolean purgeExpiredCookies(Date date) {
        LOG.trace("enter HttpState.purgeExpiredCookies(Date)");
        boolean removed = false;
        Iterator it = cookies.iterator();
        while (it.hasNext()) {
            if (((Cookie) (it.next())).isExpired(date)) {
                it.remove();
                removed = true;
            }
        }
        return removed;
    }


    /**
     * Returns the current {@link CookiePolicy cookie policy} for this
     * HTTP state.
     * 
     * @return The {@link CookiePolicy cookie policy}.
     * 
     * @deprecated Use 
     *  {@link org.apache.commons.httpclient.params.HttpMethodParams#getCookiePolicy()},
     *  {@link HttpMethod#getParams()}.     
     */
    
    public int getCookiePolicy() {
        return this.cookiePolicy;
    }
    

    /**
     * Defines whether preemptive authentication should be 
     * attempted.
     * 
     * @param value <tt>true</tt> if preemptive authentication should be 
     * attempted, <tt>false</tt> otherwise. 
     * 
     * @deprecated Use 
     * {@link org.apache.commons.httpclient.params.HttpClientParams#setAuthenticationPreemptive(boolean)}, 
     * {@link HttpClient#getParams()}.
     */
    
    public void setAuthenticationPreemptive(boolean value) {
        this.preemptive = value;
    }


    /**
     * Returns <tt>true</tt> if preemptive authentication should be 
     * attempted, <tt>false</tt> otherwise.
     * 
     * @return boolean flag.
     * 
     * @deprecated Use 
     * {@link org.apache.commons.httpclient.params.HttpClientParams#isAuthenticationPreemptive()}, 
     * {@link HttpClient#getParams()}.
     */
    
    public boolean isAuthenticationPreemptive() {
        return this.preemptive;
    }
    

    /**
     * Sets the current {@link CookiePolicy cookie policy} for this HTTP
     * state to one of the following supported policies: 
     * {@link CookiePolicy#COMPATIBILITY}, 
     * {@link CookiePolicy#NETSCAPE_DRAFT} or
     * {@link CookiePolicy#RFC2109}.
     * 
     * @param policy new {@link CookiePolicy cookie policy}
     * 
     * @deprecated 
     *  Use {@link org.apache.commons.httpclient.params.HttpMethodParams#setCookiePolicy(String)},
     *  {@link HttpMethod#getParams()}.     
     */
    
    public void setCookiePolicy(int policy) {
        this.cookiePolicy = policy;
    }