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 06:56:49 +0100 (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;
33 import java.io.IOException;
34 import java.io.InputStreamReader;
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      */
InteractiveAuthenticationExample()58     public InteractiveAuthenticationExample() {
59         super();
60     }
61 
main(String[] args)62     public static void main(String[] args) throws Exception {
63 
64         InteractiveAuthenticationExample demo = new InteractiveAuthenticationExample();
65         demo.doDemo();
66     }
67 
doDemo()68     private void doDemo() throws IOException {
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 in = null;
ConsoleAuthPrompter()90         public ConsoleAuthPrompter() {
91             super();
92             this.in = new BufferedReader(new InputStreamReader(System.in));
93         }
94 
readConsole()95         private String readConsole() throws IOException {
96             return this.in.readLine();
97         }
98 
getCredentials( final AuthScheme authscheme, final String host, int port, boolean proxy)99         public Credentials getCredentials(
100             final AuthScheme authscheme,
101             final String 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 domain = readConsole();
114                     System.out.print("Enter username: ");
115                     String user = readConsole();
116                     System.out.print("Enter password: ");
117                     String 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 user = readConsole();
125                     System.out.print("Enter password: ");
126                     String password = readConsole();
127                     return new UsernamePasswordCredentials(user, password);
128                 } else {
129                     throw new CredentialsNotAvailableException("Unsupported authentication scheme: " +
130                         authscheme.getSchemeName());
131                 }
132             } catch (IOException e) {
133                 throw new CredentialsNotAvailableException(e.getMessage(), e);
134             }
135         }
136     }
137 }
138