Tor

1
2
3
new NetlibHttpUsageExamplesRemoteTest().simple_HTTP_GET_request_with_HttpUtil();
new NetlibHttpUsageExamplesRemoteTest().execute_HTTP_GET_with_Adapter_URL();
new NetlibHttpUsageExamplesRemoteTest().execute_HTTP_GET_with_Adapter_URL_with_global_reconfiguration_of_class_URL();

1
2
3
4
// classic:   TcpipNetLayer with NetLayerIDs.TCPIP (--> HTTP over plain TCP/IP)
// anonymous: TorNetLayer with NetLayerIDs.TOR (--> HTTP over TCP/IP over Tor network)
//NetLayer lowerNetLayer = NetFactory.getInstance().getNetLayerById(NetLayerIDs.TOR); 
NetLayer lowerNetLayer = NetFactory.getInstance().getNetLayerById(NetLayerIDs.TCPIP);

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
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
/*
 * silvertunnel.org Netlib - Java library to easily access anonymity networks
 * Copyright (c) 2009-2012 silvertunnel.org
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, see <http://www.gnu.org/licenses/>.
 */

package main;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;

import org.junit.Test;
import org.silvertunnel.netlib.adapter.url.NetlibURLStreamHandlerFactory;
import org.silvertunnel.netlib.adapter.url.URLGlobalUtil;
import org.silvertunnel.netlib.api.NetFactory;
import org.silvertunnel.netlib.api.NetLayer;
import org.silvertunnel.netlib.api.NetLayerIDs;
import org.silvertunnel.netlib.api.util.TcpipNetAddress;
import org.silvertunnel.netlib.util.HttpUtil;

/**
 * This class summarizes some code fragments to demonstrate the usage of
 * HTTP APIs with silvertunnel.org Netlib.
 * 
 * This class is directly visible from some Wiki pages
 * and part of the silvertunnel.org Netlib documentation. The code fragments
 * are collected here instead and not in the Wiki to ensure that they are
 * always valid/correct and compile against the current version of the API.
 * (The author saw wrong/non compilable examples in other
 *  projects documentation too often - therefore we document it here)  
 * 
 * @author hapke
 */
public class NetlibHttpUsageExamplesRemoteTest {
    public static void main(String[] args) {
        new NetlibHttpUsageExamplesRemoteTest().simple_HTTP_GET_request_with_HttpUtil();
        new NetlibHttpUsageExamplesRemoteTest().execute_HTTP_GET_with_Adapter_URL();
        new NetlibHttpUsageExamplesRemoteTest().execute_HTTP_GET_with_Adapter_URL_with_global_reconfiguration_of_class_URL();
    }
    /**
     * Example: HTTP request using the very simple HttpUtil to load URL
     * http://httptest.silvertunnel.org/htt...jsp?id=example
     * 
     * More documentation:
     * http://sourceforge.net/apps/trac/sil...NetlibHttpUtil
     */
    @Test
    public void simple_HTTP_GET_request_with_HttpUtil() {
        try {
            // classic:   TcpipNetLayer with NetLayerIDs.TCPIP (--> HTTP over plain TCP/IP)
            // anonymous: TorNetLayer with NetLayerIDs.TOR (--> HTTP over TCP/IP over Tor network)
            //NetLayer lowerNetLayer = NetFactory.getInstance().getNetLayerById(NetLayerIDs.TOR); 
            NetLayer lowerNetLayer = NetFactory.getInstance().getNetLayerById(NetLayerIDs.TCPIP); 

            // wait until TOR is ready (optional) - this is only relevant for anonymous communication:
            lowerNetLayer.waitUntilReady();

            // prepare parameters (http default port: 80)
            TcpipNetAddress httpServerNetAddress = new TcpipNetAddress("httptest.silvertunnel.org", 80);
            String pathOnHttpServer = "/httptest/bigtest.jsp?id=example";
            long timeoutInMs = 5000;

            // do the HTTP request and wait for the response
            byte[] responseBody = HttpUtil.getInstance().get(lowerNetLayer, httpServerNetAddress, pathOnHttpServer, timeoutInMs);

            // print out the response
            System.out.println(new String(responseBody));

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * Example: HTTP request using Adapter URL to load
     * http://httptest.silvertunnel.org/htt...sp?id=example2
     * 
     * This example does not change the global settings of java.net.URL
     * and is preferred over the next example
     * (execute_HTTP_GET_with_Adapter_URL_with_global_reconfiguration_of_class_URL).
     * 
     * More documentation:
     * http://sourceforge.net/apps/trac/sil...NetlibHttpUtil
     */
    @Test
    public void execute_HTTP_GET_with_Adapter_URL() {
        try {
            // classic:   TcpipNetLayer with NetLayerIDs.TCPIP (--> HTTP over plain TCP/IP)
            // anonymous: TorNetLayer with NetLayerIDs.TOR (--> HTTP over TCP/IP over Tor network)
            //NetLayer lowerNetLayer = NetFactory.getInstance().getNetLayerById(NetLayerIDs.TCPIP); 
            NetLayer lowerNetLayer = NetFactory.getInstance().getNetLayerById(NetLayerIDs.TCPIP); 

            // wait until TOR is ready (optional) - this is only relevant for anonymous communication:
            lowerNetLayer.waitUntilReady();

            // prepare URL handling on top of the lowerNetLayer
            NetlibURLStreamHandlerFactory factory = new NetlibURLStreamHandlerFactory(false);
            // the following method could be called multiple times
            // to change layer used by the factory over the time:
            factory.setNetLayerForHttpHttpsFtp(lowerNetLayer);

            // create the suitable URL object
            String urlStr = "http://httptest.silvertunnel.org/httptest/bigtest.jsp?id=example2";
            URLStreamHandler handler = factory.createURLStreamHandler("http");
            URL context = null;
            URL url = new URL(context, urlStr, handler);



            ///////////////////////////////////////////////
            // the rest of this method is as for every java.net.URL object,
            // read JDK docs to find out alternative ways:
            ///////////////////////////////////////////////
            
            // send request without POSTing data
            URLConnection urlConnection = url.openConnection();
            urlConnection.setDoInput(true); 
            urlConnection.setDoOutput(false); 
            urlConnection.connect();

            // receive and print the response
            BufferedReader response = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
            String line;
            while ((line=response.readLine())!=null) {
                System.out.println(line);
            }
            response.close();

        } catch (IOException e) {
            e.printStackTrace();
        }
        
        System.out.println("************************************");
        System.out.println("************************************");
        System.out.println("************************************");
        System.out.println("************************************");
        System.out.println("************************************");
        System.out.println("************************************");
        System.out.println("************************************");
        System.out.println("************************************");
        System.out.println("************************************");
        System.out.println("************************************");
    }  
    
    /**
     * Example: HTTP request using Adapter URL to load
     * http://httptest.silvertunnel.org/htt...sp?id=example3
     * 
     * This example changes the global settings of java.net.URL
     * and can have side effects to code in the same JVM. The way shown here
     * should only be used if necessary. Otherwise, the previous example
     * (execute_HTTP_GET_with_Adapter_URL_with_global_reconfiguration_of_class_URL)
     * if preferred.
     * 
     * More documentation:
     * http://sourceforge.net/apps/trac/sil...NetlibHttpUtil
     */
    // to to influence other tests in the same JVM: do not execute @Test
    public void execute_HTTP_GET_with_Adapter_URL_with_global_reconfiguration_of_class_URL() {
        try {
            // classic:   TcpipNetLayer with NetLayerIDs.TCPIP (--> HTTP over plain TCP/IP)
            // anonymous: TorNetLayer with NetLayerIDs.TOR (--> HTTP over TCP/IP over Tor network)
            //NetLayer lowerNetLayer = NetFactory.getInstance().getNetLayerById(NetLayerIDs.TOR); 
            NetLayer lowerNetLayer = NetFactory.getInstance().getNetLayerById(NetLayerIDs.TCPIP); 

            // wait until TOR is ready (optional) - this is only relevant for anonymous communication:
            lowerNetLayer.waitUntilReady();

            // redirect URL handling (JVM global)
            URLGlobalUtil.initURLStreamHandlerFactory();
            // the following method could be called multiple times
            // to change layer used by the global factory over the time:
            URLGlobalUtil.setNetLayerUsedByURLStreamHandlerFactory(lowerNetLayer);

            // create a URL object
            String urlStr = "http://httptest.silvertunnel.org/httptest/bigtest.jsp?id=example3";
            URL url = new URL(urlStr);



            ///////////////////////////////////////////////
            // the rest of this method is as for every java.net.URL object,
            // read JDK docs to find out alternative ways:
            ///////////////////////////////////////////////
            
            // send request without POSTing data
            URLConnection urlConnection = url.openConnection();
            urlConnection.setDoInput(true); 
            urlConnection.setDoOutput(false); 
            urlConnection.connect();

            // receive and print the response
            BufferedReader response = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
            String line;
            while ((line=response.readLine())!=null) {
                System.out.println(line);
            }
            response.close();

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}