/*
* $HeadURL: https://svn.apache.org/repos/asf/jakarta/httpcomponents/httpclient/tags/4.0-alpha2/module-client/src/main/java/org/apache/http/client/protocol/RequestProxyAuthentication.java $
* $Revision: 558119 $
* $Date: 2007-07-20 22:21:22 +0200 (Fri, 20 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.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.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.auth.AUTH;
import org.apache.http.auth.AuthScheme;
import org.apache.http.auth.AuthenticationException;
import org.apache.http.auth.Credentials;
import org.apache.http.client.AuthState;
import org.apache.http.protocol.HttpContext;
/**
* @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
*
* @version $Revision: 558119 $
*
* @since 4.0
*/
public class RequestProxyAuthentication implements HttpRequestInterceptor {
private static final Log LOG = LogFactory.getLog(RequestProxyAuthentication.class);
public RequestProxyAuthentication() {
super();
}
public void process(final HttpRequest request, final HttpContext context)
throws HttpException, IOException {
if (request == null) {
throw new IllegalArgumentException("HTTP request may not be null");
}
if (context == null) {
throw new IllegalArgumentException("HTTP context may not be null");
}
if (request.containsHeader(AUTH.PROXY_AUTH_RESP)) {
return;
}
// Obtain authentication state
AuthState authState = (AuthState) context.getAttribute(
ClientContext.PROXY_AUTH_STATE);
if (authState == null) {
return;
}
AuthScheme authScheme = authState.getAuthScheme();
if (authScheme == null) {
return;
}
Credentials creds = authState.getCredentials();
if (creds == null) {
LOG.debug("User credentials not available");
return;
}
if (authState.getAuthScope() != null || !authScheme.isConnectionBased()) {
try {
request.addHeader(authScheme.authenticate(creds, request));
} catch (AuthenticationException ex) {
if (LOG.isErrorEnabled()) {
LOG.error("Proxy authentication error: " + ex.getMessage());
}
}
}
}
}