1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27 package org.apache.hc.client5.http.examples;
28
29 import org.apache.hc.client5.http.auth.AuthExchange;
30 import org.apache.hc.client5.http.auth.AuthScheme;
31 import org.apache.hc.client5.http.auth.AuthScope;
32 import org.apache.hc.client5.http.auth.UsernamePasswordCredentials;
33 import org.apache.hc.client5.http.classic.methods.HttpGet;
34 import org.apache.hc.client5.http.impl.auth.BasicCredentialsProvider;
35 import org.apache.hc.client5.http.impl.auth.DigestScheme;
36 import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
37 import org.apache.hc.client5.http.impl.classic.CloseableHttpResponse;
38 import org.apache.hc.client5.http.impl.classic.HttpClients;
39 import org.apache.hc.client5.http.protocol.HttpClientContext;
40 import org.apache.hc.core5.http.HttpHost;
41 import org.apache.hc.core5.http.io.entity.EntityUtils;
42
43
44
45
46
47
48
49 public class ClientPreemptiveDigestAuthentication {
50
51 public static void main(final String[] args) throws Exception {
52 try (final CloseableHttpClient httpclient = HttpClients.createDefault()) {
53
54 final HttpHost target = new HttpHost("http", "httpbin.org", 80);
55
56 final HttpClientContext localContext = HttpClientContext.create();
57 final BasicCredentialsProvider credentialsProvider = new BasicCredentialsProvider();
58 credentialsProvider.setCredentials(
59 new AuthScope(target),
60 new UsernamePasswordCredentials("user", "passwd".toCharArray()));
61 localContext.setCredentialsProvider(credentialsProvider);
62
63 final HttpGet httpget = new HttpGet("http://httpbin.org/digest-auth/auth/user/passwd");
64
65 System.out.println("Executing request " + httpget.getMethod() + " " + httpget.getUri());
66 for (int i = 0; i < 3; i++) {
67 try (final CloseableHttpResponse response = httpclient.execute(target, httpget, localContext)) {
68 System.out.println("----------------------------------------");
69 System.out.println(response.getCode() + " " + response.getReasonPhrase());
70 EntityUtils.consume(response.getEntity());
71
72 final AuthExchange authExchange = localContext.getAuthExchange(target);
73 if (authExchange != null) {
74 final AuthScheme authScheme = authExchange.getAuthScheme();
75 if (authScheme instanceof DigestScheme) {
76 final DigestScheme digestScheme = (DigestScheme) authScheme;
77 System.out.println("Nonce: " + digestScheme.getNonce() +
78 "; count: " + digestScheme.getNounceCount());
79 }
80 }
81 }
82 }
83 }
84 }
85
86 }