| /* |
| * ==================================================================== |
| * |
| * 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.examples.client; |
| |
| import org.apache.http.HttpEntity; |
| import org.apache.http.HttpHost; |
| import org.apache.http.HttpResponse; |
| import org.apache.http.auth.AuthScope; |
| import org.apache.http.auth.UsernamePasswordCredentials; |
| import org.apache.http.client.AuthCache; |
| import org.apache.http.client.methods.HttpGet; |
| import org.apache.http.client.protocol.ClientContext; |
| import org.apache.http.impl.auth.BasicScheme; |
| import org.apache.http.impl.client.BasicAuthCache; |
| import org.apache.http.impl.client.DefaultHttpClient; |
| import org.apache.http.protocol.BasicHttpContext; |
| import org.apache.http.util.EntityUtils; |
| |
| /** |
| * An example of HttpClient can be customized to authenticate |
| * preemptively using BASIC scheme. |
| * <b/> |
| * Generally, preemptive authentication can be considered less |
| * secure than a response to an authentication challenge |
| * and therefore discouraged. |
| */ |
| public class ClientPreemptiveBasicAuthentication { |
| |
| public static void main(String[] args) throws Exception { |
| |
| HttpHost targetHost = new HttpHost("localhost", 80, "http"); |
| |
| DefaultHttpClient httpclient = new DefaultHttpClient(); |
| try { |
| httpclient.getCredentialsProvider().setCredentials( |
| new AuthScope(targetHost.getHostName(), targetHost.getPort()), |
| new UsernamePasswordCredentials("username", "password")); |
| |
| // Create AuthCache instance |
| AuthCache authCache = new BasicAuthCache(); |
| // Generate BASIC scheme object and add it to the local |
| // auth cache |
| BasicScheme basicAuth = new BasicScheme(); |
| authCache.put(targetHost, basicAuth); |
| |
| // Add AuthCache to the execution context |
| BasicHttpContext localcontext = new BasicHttpContext(); |
| localcontext.setAttribute(ClientContext.AUTH_CACHE, authCache); |
| |
| HttpGet httpget = new HttpGet("/"); |
| |
| System.out.println("executing request: " + httpget.getRequestLine()); |
| System.out.println("to target: " + targetHost); |
| |
| for (int i = 0; i < 3; i++) { |
| HttpResponse response = httpclient.execute(targetHost, httpget, localcontext); |
| HttpEntity entity = response.getEntity(); |
| |
| System.out.println("----------------------------------------"); |
| System.out.println(response.getStatusLine()); |
| if (entity != null) { |
| System.out.println("Response content length: " + entity.getContentLength()); |
| } |
| EntityUtils.consume(entity); |
| } |
| |
| } finally { |
| // When HttpClient instance is no longer needed, |
| // shut down the connection manager to ensure |
| // immediate deallocation of all system resources |
| httpclient.getConnectionManager().shutdown(); |
| } |
| } |
| |
| } |