michael@0: /*
michael@0:  * ====================================================================
michael@0:  * Licensed to the Apache Software Foundation (ASF) under one
michael@0:  * or more contributor license agreements.  See the NOTICE file
michael@0:  * distributed with this work for additional information
michael@0:  * regarding copyright ownership.  The ASF licenses this file
michael@0:  * to you under the Apache License, Version 2.0 (the
michael@0:  * "License"); you may not use this file except in compliance
michael@0:  * with the License.  You may obtain a copy of the License at
michael@0:  *
michael@0:  *   http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  * Unless required by applicable law or agreed to in writing,
michael@0:  * software distributed under the License is distributed on an
michael@0:  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
michael@0:  * KIND, either express or implied.  See the License for the
michael@0:  * specific language governing permissions and limitations
michael@0:  * under the License.
michael@0:  * ====================================================================
michael@0:  *
michael@0:  * This software consists of voluntary contributions made by many
michael@0:  * individuals on behalf of the Apache Software Foundation.  For more
michael@0:  * information on the Apache Software Foundation, please see
michael@0:  * <http://www.apache.org/>.
michael@0:  *
michael@0:  */
michael@0: 
michael@0: package ch.boye.httpclientandroidlib.client.protocol;
michael@0: 
michael@0: import java.io.IOException;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.annotation.Immutable;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.androidextra.HttpClientAndroidLog;
michael@0: /* LogFactory removed by HttpClient for Android script. */
michael@0: import ch.boye.httpclientandroidlib.Header;
michael@0: import ch.boye.httpclientandroidlib.HttpException;
michael@0: import ch.boye.httpclientandroidlib.HttpRequest;
michael@0: import ch.boye.httpclientandroidlib.HttpRequestInterceptor;
michael@0: import ch.boye.httpclientandroidlib.auth.AUTH;
michael@0: import ch.boye.httpclientandroidlib.auth.AuthScheme;
michael@0: import ch.boye.httpclientandroidlib.auth.AuthState;
michael@0: import ch.boye.httpclientandroidlib.auth.AuthenticationException;
michael@0: import ch.boye.httpclientandroidlib.auth.ContextAwareAuthScheme;
michael@0: import ch.boye.httpclientandroidlib.auth.Credentials;
michael@0: import ch.boye.httpclientandroidlib.protocol.HttpContext;
michael@0: 
michael@0: /**
michael@0:  * Generates authentication header for the target host, if required,
michael@0:  * based on the actual state of the HTTP authentication context.
michael@0:  *
michael@0:  * @since 4.0
michael@0:  */
michael@0: @Immutable
michael@0: public class RequestTargetAuthentication implements HttpRequestInterceptor {
michael@0: 
michael@0:     public HttpClientAndroidLog log = new HttpClientAndroidLog(getClass());
michael@0: 
michael@0:     public RequestTargetAuthentication() {
michael@0:         super();
michael@0:     }
michael@0: 
michael@0:     @SuppressWarnings("deprecation")
michael@0:     public void process(final HttpRequest request, final HttpContext context)
michael@0:             throws HttpException, IOException {
michael@0:         if (request == null) {
michael@0:             throw new IllegalArgumentException("HTTP request may not be null");
michael@0:         }
michael@0:         if (context == null) {
michael@0:             throw new IllegalArgumentException("HTTP context may not be null");
michael@0:         }
michael@0: 
michael@0:         String method = request.getRequestLine().getMethod();
michael@0:         if (method.equalsIgnoreCase("CONNECT")) {
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         if (request.containsHeader(AUTH.WWW_AUTH_RESP)) {
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         // Obtain authentication state
michael@0:         AuthState authState = (AuthState) context.getAttribute(
michael@0:                 ClientContext.TARGET_AUTH_STATE);
michael@0:         if (authState == null) {
michael@0:             this.log.debug("Target auth state not set in the context");
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         AuthScheme authScheme = authState.getAuthScheme();
michael@0:         if (authScheme == null) {
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         Credentials creds = authState.getCredentials();
michael@0:         if (creds == null) {
michael@0:             this.log.debug("User credentials not available");
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         if (authState.getAuthScope() != null || !authScheme.isConnectionBased()) {
michael@0:             try {
michael@0:                 Header header;
michael@0:                 if (authScheme instanceof ContextAwareAuthScheme) {
michael@0:                     header = ((ContextAwareAuthScheme) authScheme).authenticate(
michael@0:                             creds, request, context);
michael@0:                 } else {
michael@0:                     header = authScheme.authenticate(creds, request);
michael@0:                 }
michael@0:                 request.addHeader(header);
michael@0:             } catch (AuthenticationException ex) {
michael@0:                 if (this.log.isErrorEnabled()) {
michael@0:                     this.log.error("Authentication error: " + ex.getMessage());
michael@0:                 }
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: 
michael@0: }