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Java > Open Source Codes > InteractiveAuthenticationExample


1 /*
2  * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//httpclient/src/examples/InteractiveAuthenticationExample.java,v 1.2 2004/02/22 18:08:45 olegk Exp $
3  * $Revision: 480424 $
4  * $Date: 2006-11-29 05:56:49 +0000 (Wed, 29 Nov 2006) $
5  * ====================================================================
6  *
7  * Licensed to the Apache Software Foundation (ASF) under one or more
8  * contributor license agreements. See the NOTICE file distributed with
9  * this work for additional information regarding copyright ownership.
10  * The ASF licenses this file to You under the Apache License, Version 2.0
11  * (the "License"); you may not use this file except in compliance with
12  * the License. You may obtain a copy of the License at
13  *
14  * http://www.apache.org/licenses/LICENSE-2.0
15  *
16  * Unless required by applicable law or agreed to in writing, software
17  * distributed under the License is distributed on an "AS IS" BASIS,
18  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19  * See the License for the specific language governing permissions and
20  * limitations under the License.
21  * ====================================================================
22  *
23  * This software consists of voluntary contributions made by many
24  * individuals on behalf of the Apache Software Foundation. For more
25  * information on the Apache Software Foundation, please see
26  * <http://www.apache.org/>.
27  *
28  * [Additional notices, if required by prior licensing conditions]
29  *
30  */
31
32 import java.io.BufferedReader JavaDoc;
33 import java.io.IOException JavaDoc;
34 import java.io.InputStreamReader JavaDoc;
35
36 import org.apache.commons.httpclient.Credentials;
37 import org.apache.commons.httpclient.HttpClient;
38 import org.apache.commons.httpclient.NTCredentials;
39 import org.apache.commons.httpclient.UsernamePasswordCredentials;
40 import org.apache.commons.httpclient.auth.AuthScheme;
41 import org.apache.commons.httpclient.auth.CredentialsProvider;
42 import org.apache.commons.httpclient.auth.CredentialsNotAvailableException;
43 import org.apache.commons.httpclient.auth.NTLMScheme;
44 import org.apache.commons.httpclient.auth.RFC2617Scheme;
45 import org.apache.commons.httpclient.methods.GetMethod;
46
47 /**
48  * A simple example that uses HttpClient to perform interactive
49  * authentication.
50  *
51  * @author Oleg Kalnichevski
52  */
53 public class InteractiveAuthenticationExample {
54
55     /**
56      * Constructor for InteractiveAuthenticationExample.
57      */
58     public InteractiveAuthenticationExample() {
59         super();
60     }
61
62     public static void main(String JavaDoc[] args) throws Exception JavaDoc {
63
64         InteractiveAuthenticationExample demo = new InteractiveAuthenticationExample();
65         demo.doDemo();
66     }
67     
68     private void doDemo() throws IOException JavaDoc {
69
70         HttpClient client = new HttpClient();
71         client.getParams().setParameter(
72             CredentialsProvider.PROVIDER, new ConsoleAuthPrompter());
73         GetMethod httpget = new GetMethod("http://target-host/requires-auth.html");
74         httpget.setDoAuthentication(true);
75         try {
76             // execute the GET
77 int status = client.executeMethod(httpget);
78             // print the status and response
79 System.out.println(httpget.getStatusLine().toString());
80             System.out.println(httpget.getResponseBodyAsString());
81         } finally {
82             // release any connection resources used by the method
83 httpget.releaseConnection();
84         }
85     }
86
87     public class ConsoleAuthPrompter implements CredentialsProvider {
88
89         private BufferedReader JavaDoc in = null;
90         public ConsoleAuthPrompter() {
91             super();
92             this.in = new BufferedReader JavaDoc(new InputStreamReader JavaDoc(System.in));
93         }
94         
95         private String JavaDoc readConsole() throws IOException JavaDoc {
96             return this.in.readLine();
97         }
98         
99         public Credentials getCredentials(
100             final AuthScheme authscheme,
101             final String JavaDoc host,
102             int port,
103             boolean proxy)
104             throws CredentialsNotAvailableException
105         {
106             if (authscheme == null) {
107                 return null;
108             }
109             try{
110                 if (authscheme instanceof NTLMScheme) {
111                     System.out.println(host + ":" + port + " requires Windows authentication");
112                     System.out.print("Enter domain: ");
113                     String JavaDoc domain = readConsole();
114                     System.out.print("Enter username: ");
115                     String JavaDoc user = readConsole();
116                     System.out.print("Enter password: ");
117                     String JavaDoc password = readConsole();
118                     return new NTCredentials(user, password, host, domain);
119                 } else
120                 if (authscheme instanceof RFC2617Scheme) {
121                     System.out.println(host + ":" + port + " requires authentication with the realm '"
122                         + authscheme.getRealm() + "'");
123                     System.out.print("Enter username: ");
124                     String JavaDoc user = readConsole();
125                     System.out.print("Enter password: ");
126                     String JavaDoc password = readConsole();
127                     return new UsernamePasswordCredentials(user, password);
128                 } else {
129                     throw new CredentialsNotAvailableException("Unsupported authentication scheme: " +
130                         authscheme.getSchemeName());
131                 }
132             } catch (IOException JavaDoc e) {
133                 throw new CredentialsNotAvailableException(e.getMessage(), e);
134             }
135         }
136     }
137 }
138
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