1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27 package org.apache.hc.client5.http.examples;
28
29 import org.apache.hc.client5.http.ContextBuilder;
30 import org.apache.hc.client5.http.auth.UsernamePasswordCredentials;
31 import org.apache.hc.client5.http.classic.methods.HttpGet;
32 import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
33 import org.apache.hc.client5.http.impl.classic.HttpClients;
34 import org.apache.hc.client5.http.protocol.HttpClientContext;
35 import org.apache.hc.core5.http.HttpHost;
36 import org.apache.hc.core5.http.io.entity.EntityUtils;
37 import org.apache.hc.core5.http.message.StatusLine;
38
39 /**
40 * An example of how HttpClient can be customized to authenticate
41 * preemptively using Basic scheme.
42 * <b/>
43 * Generally, preemptive authentication can be considered less
44 * secure than a response to an authentication challenge
45 * and therefore discouraged.
46 */
47 public class ClientPreemptiveBasicAuthentication {
48
49 public static void main(final String[] args) throws Exception {
50 try (final CloseableHttpClient httpclient = HttpClients.createDefault()) {
51
52 final HttpClientContext localContext = ContextBuilder.create()
53 .preemptiveBasicAuth(new HttpHost("http", "httpbin.org"),
54 new UsernamePasswordCredentials("user", "passwd".toCharArray()))
55 .build();
56
57 final HttpGet httpget = new HttpGet("http://httpbin.org/hidden-basic-auth/user/passwd");
58
59 System.out.println("Executing request " + httpget.getMethod() + " " + httpget.getUri());
60 for (int i = 0; i < 3; i++) {
61 httpclient.execute(httpget, localContext, response -> {
62 System.out.println("----------------------------------------");
63 System.out.println(httpget + "->" + new StatusLine(response));
64 EntityUtils.consume(response.getEntity());
65 return null;
66 });
67 }
68 }
69 }
70
71 }