1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.net.telnet;
18
19 import java.io.InputStream;
20 import java.io.OutputStream;
21
22 /**
23 * Simple stream responder. Waits for strings on an input stream and answers sending corresponfing strings on an output stream. The reader runs in a separate
24 * thread.
25 */
26 public class TelnetTestResponder implements Runnable {
27 InputStream _is;
28 OutputStream _os;
29 String _inputs[], _outputs[];
30 long _timeout;
31
32 /**
33 * Constructor. Starts a new thread for the reader.
34 * <p>
35 *
36 * @param is - InputStream on which to read.
37 * @param os - OutputStream on which to answer.
38 * @param inputs - Array of waited for Strings.
39 * @param outputs - Array of answers.
40 * @param timeout - milliseconds
41 */
42 public TelnetTestResponder(final InputStream is, final OutputStream os, final String inputs[], final String outputs[], final long timeout) {
43 _is = is;
44 _os = os;
45 _timeout = timeout;
46 _inputs = inputs;
47 _outputs = outputs;
48 final Thread reader = new Thread(this);
49
50 reader.start();
51 }
52
53 /**
54 * Runs the responder
55 */
56 @Override
57 public void run() {
58 boolean result = false;
59 final byte[] buffer = new byte[32];
60 final long starttime = System.currentTimeMillis();
61
62 try {
63 final StringBuilder readbytes = new StringBuilder();
64 while (!result && System.currentTimeMillis() - starttime < _timeout) {
65 if (_is.available() > 0) {
66 final int ret_read = _is.read(buffer);
67 readbytes.append(new String(buffer, 0, ret_read));
68
69 for (int ii = 0; ii < _inputs.length; ii++) {
70 if (readbytes.indexOf(_inputs[ii]) >= 0) {
71 Thread.sleep(1000 * ii);
72 _os.write(_outputs[ii].getBytes());
73 result = true;
74 }
75 }
76 } else {
77 Thread.sleep(500);
78 }
79 }
80
81 } catch (final Exception e) {
82 System.err.println("Error while waiting endstring. " + e.getMessage());
83 }
84 }
85 }