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/*
 * ====================================================================
 * 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
 * .
 *
 */
package org.apache.http.impl.client;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpHost;
import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.auth.AuthScheme;
import org.apache.http.client.AuthCache;
import org.apache.http.conn.SchemePortResolver;
import org.apache.http.conn.UnsupportedSchemeException;
import org.apache.http.impl.conn.DefaultSchemePortResolver;
import org.apache.http.util.Args;

/**
 * Default implementation of {@link org.apache.http.client.AuthCache}. This implements
 * expects {@link org.apache.http.auth.AuthScheme} to be {@link java.io.Serializable}
 * in order to be cacheable.
 * 

* Instances of this class are thread safe as of version 4.4. *

* * @since 4.1 */ @Contract(threading = ThreadingBehavior.SAFE) public class BasicAuthCache implements AuthCache { private final Log log = LogFactory.getLog(getClass()); private final Map map; private final SchemePortResolver schemePortResolver; /** * Default constructor. * * @since 4.3 */ public BasicAuthCache(final SchemePortResolver schemePortResolver) { super(); this.map = new ConcurrentHashMap(); this.schemePortResolver = schemePortResolver != null ? schemePortResolver : DefaultSchemePortResolver.INSTANCE; } public BasicAuthCache() { this(null); } protected HttpHost getKey(final HttpHost host) { if (host.getPort() <= 0) { final int port; try { port = schemePortResolver.resolve(host); } catch (final UnsupportedSchemeException ignore) { return host; } return new HttpHost(host.getHostName(), port, host.getSchemeName()); } return host; } @Override public void put(final HttpHost host, final AuthScheme authScheme) { Args.notNull(host, "HTTP host"); if (authScheme == null) { return; } if (authScheme instanceof Serializable) { try { final ByteArrayOutputStream buf = new ByteArrayOutputStream(); final ObjectOutputStream out = new ObjectOutputStream(buf); out.writeObject(authScheme); out.close(); this.map.put(getKey(host), buf.toByteArray()); } catch (final IOException ex) { if (log.isWarnEnabled()) { log.warn("Unexpected I/O error while serializing auth scheme", ex); } } } else { if (log.isDebugEnabled()) { log.debug("Auth scheme " + authScheme.getClass() + " is not serializable"); } } } @Override public AuthScheme get(final HttpHost host) { Args.notNull(host, "HTTP host"); final byte[] bytes = this.map.get(getKey(host)); if (bytes != null) { try { final ByteArrayInputStream buf = new ByteArrayInputStream(bytes); final ObjectInputStream in = new ObjectInputStream(buf); final AuthScheme authScheme = (AuthScheme) in.readObject(); in.close(); return authScheme; } catch (final IOException ex) { if (log.isWarnEnabled()) { log.warn("Unexpected I/O error while de-serializing auth scheme", ex); } return null; } catch (final ClassNotFoundException ex) { if (log.isWarnEnabled()) { log.warn("Unexpected error while de-serializing auth scheme", ex); } return null; } } return null; } @Override public void remove(final HttpHost host) { Args.notNull(host, "HTTP host"); this.map.remove(getKey(host)); } @Override public void clear() { this.map.clear(); } @Override public String toString() { return this.map.toString(); } }




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