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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
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 * .
 *
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package org.apache.http.client;

import java.util.Map;
import java.util.Queue;

import org.apache.http.Header;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthOption;
import org.apache.http.auth.AuthScheme;
import org.apache.http.auth.MalformedChallengeException;
import org.apache.http.protocol.HttpContext;

/**
/**
 * A handler for determining if an HTTP response represents an authentication challenge that was
 * sent back to the client as a result of authentication failure.
 * 

* Implementations of this interface must be thread-safe. Access to shared data must be * synchronized as methods of this interface may be executed from multiple threads. * * @since 4.2 */ public interface AuthenticationStrategy { /** * Determines if the given HTTP response response represents * an authentication challenge that was sent back as a result * of authentication failure. * * @param authhost authentication host. * @param response HTTP response. * @param context HTTP context. * @return {@code true} if user authentication is required, * {@code false} otherwise. */ boolean isAuthenticationRequested( HttpHost authhost, HttpResponse response, HttpContext context); /** * Extracts from the given HTTP response a collection of authentication * challenges, each of which represents an authentication scheme supported * by the authentication host. * * @param authhost authentication host. * @param response HTTP response. * @param context HTTP context. * @return a collection of challenges keyed by names of corresponding * authentication schemes. * @throws MalformedChallengeException if one of the authentication * challenges is not valid or malformed. */ Map getChallenges( HttpHost authhost, HttpResponse response, HttpContext context) throws MalformedChallengeException; /** * Selects one authentication challenge out of all available and * creates and generates {@link AuthOption} instance capable of * processing that challenge. * * @param challenges collection of challenges. * @param authhost authentication host. * @param response HTTP response. * @param context HTTP context. * @return authentication auth schemes that can be used for authentication. Can be empty. * @throws MalformedChallengeException if one of the authentication * challenges is not valid or malformed. */ Queue select( Map challenges, HttpHost authhost, HttpResponse response, HttpContext context) throws MalformedChallengeException; /** * Callback invoked in case of successful authentication. * * @param authhost authentication host. * @param authScheme authentication scheme used. * @param context HTTP context. */ void authSucceeded( HttpHost authhost, AuthScheme authScheme, HttpContext context); /** * Callback invoked in case of unsuccessful authentication. * * @param authhost authentication host. * @param authScheme authentication scheme used. * @param context HTTP context. */ void authFailed( HttpHost authhost, AuthScheme authScheme, HttpContext context); }





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