org.apache.http.client.protocol.ResponseAuthCache Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of httpclient Show documentation
Builds the httpclient. Requires the commons logging to be built first and be excluded from any other poms requiring it.
The newest version!
/*
 * ====================================================================
 * 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.client.protocol;

import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpException;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.HttpResponseInterceptor;
import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.auth.AuthScheme;
import org.apache.http.auth.AuthState;
import org.apache.http.client.AuthCache;
import org.apache.http.client.params.AuthPolicy;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.impl.client.BasicAuthCache;
import org.apache.http.protocol.ExecutionContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.Args;

/**
 * Response interceptor that adds successfully completed {@link AuthScheme}s
 * to the local {@link AuthCache} instance. Cached {@link AuthScheme}s can be
 * re-used when executing requests against known hosts, thus avoiding
 * additional authentication round-trips.
 *
 * @since 4.1
 *
 * @deprecated (4.2)  use {@link org.apache.http.client.AuthenticationStrategy}
 */
@Contract(threading = ThreadingBehavior.IMMUTABLE)
@Deprecated
public class ResponseAuthCache implements HttpResponseInterceptor {

    private final Log log = LogFactory.getLog(getClass());

    public ResponseAuthCache() {
        super();
    }

    @Override
    public void process(final HttpResponse response, final HttpContext context)
            throws HttpException, IOException {
        Args.notNull(response, "HTTP request");
        Args.notNull(context, "HTTP context");
        AuthCache authCache = (AuthCache) context.getAttribute(ClientContext.AUTH_CACHE);

        HttpHost target = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
        final AuthState targetState = (AuthState) context.getAttribute(ClientContext.TARGET_AUTH_STATE);
        if (target != null && targetState != null) {
            if (this.log.isDebugEnabled()) {
                this.log.debug("Target auth state: " + targetState.getState());
            }
            if (isCachable(targetState)) {
                final SchemeRegistry schemeRegistry = (SchemeRegistry) context.getAttribute(
                        ClientContext.SCHEME_REGISTRY);
                if (target.getPort() < 0) {
                    final Scheme scheme = schemeRegistry.getScheme(target);
                    target = new HttpHost(target.getHostName(),
                            scheme.resolvePort(target.getPort()), target.getSchemeName());
                }
                if (authCache == null) {
                    authCache = new BasicAuthCache();
                    context.setAttribute(ClientContext.AUTH_CACHE, authCache);
                }
                switch (targetState.getState()) {  // TODO add SUCCESS, UNCHALLENGED and HANDSHAKE cases
                case CHALLENGED:
                    cache(authCache, target, targetState.getAuthScheme());
                    break;
                case FAILURE:
                    uncache(authCache, target, targetState.getAuthScheme());
                }
            }
        }

        final HttpHost proxy = (HttpHost) context.getAttribute(ExecutionContext.HTTP_PROXY_HOST);
        final AuthState proxyState = (AuthState) context.getAttribute(ClientContext.PROXY_AUTH_STATE);
        if (proxy != null && proxyState != null) {
            if (this.log.isDebugEnabled()) {
                this.log.debug("Proxy auth state: " + proxyState.getState());
            }
            if (isCachable(proxyState)) {
                if (authCache == null) {
                    authCache = new BasicAuthCache();
                    context.setAttribute(ClientContext.AUTH_CACHE, authCache);
                }
                switch (proxyState.getState()) {  // TODO add SUCCESS, UNCHALLENGED and HANDSHAKE cases
                case CHALLENGED:
                    cache(authCache, proxy, proxyState.getAuthScheme());
                    break;
                case FAILURE:
                    uncache(authCache, proxy, proxyState.getAuthScheme());
                }
            }
        }
    }

    private boolean isCachable(final AuthState authState) {
        final AuthScheme authScheme = authState.getAuthScheme();
        if (authScheme == null || !authScheme.isComplete()) {
            return false;
        }
        final String schemeName = authScheme.getSchemeName();
        return schemeName.equalsIgnoreCase(AuthPolicy.BASIC) ||
                schemeName.equalsIgnoreCase(AuthPolicy.DIGEST);
    }

    private void cache(final AuthCache authCache, final HttpHost host, final AuthScheme authScheme) {
        if (this.log.isDebugEnabled()) {
            this.log.debug("Caching '" + authScheme.getSchemeName() +
                    "' auth scheme for " + host);
        }
        authCache.put(host, authScheme);
    }

    private void uncache(final AuthCache authCache, final HttpHost host, final AuthScheme authScheme) {
        if (this.log.isDebugEnabled()) {
            this.log.debug("Removing from cache '" + authScheme.getSchemeName() +
                    "' auth scheme for " + host);
        }
        authCache.remove(host);
    }
}