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 * https://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 in;
28 OutputStream out;
29 String inputs[];
30 String outputs[];
31 long timeout;
32
33 /**
34 * Constructs a new instance. Starts a new thread for the reader.
35 * <p>
36 *
37 * @param is InputStream on which to read.
38 * @param os OutputStream on which to answer.
39 * @param inputs Array of waited for Strings.
40 * @param outputs Array of answers.
41 * @param timeout milliseconds
42 */
43 public TelnetTestResponder(final InputStream is, final OutputStream os, final String inputs[], final String outputs[], final long timeout) {
44 this.in = is;
45 this.out = os;
46 this.timeout = timeout;
47 this.inputs = inputs;
48 this.outputs = outputs;
49 final Thread reader = new Thread(this);
50
51 reader.start();
52 }
53
54 /**
55 * Runs the responder
56 */
57 @Override
58 public void run() {
59 boolean result = false;
60 final byte[] buffer = new byte[32];
61 final long starttime = System.currentTimeMillis();
62
63 try {
64 final StringBuilder readbytes = new StringBuilder();
65 while (!result && System.currentTimeMillis() - starttime < timeout) {
66 if (in.available() > 0) {
67 final int ret_read = in.read(buffer);
68 readbytes.append(new String(buffer, 0, ret_read));
69
70 for (int ii = 0; ii < inputs.length; ii++) {
71 if (readbytes.indexOf(inputs[ii]) >= 0) {
72 Thread.sleep(1000 * ii);
73 out.write(outputs[ii].getBytes());
74 result = true;
75 }
76 }
77 } else {
78 Thread.sleep(500);
79 }
80 }
81
82 } catch (final Exception e) {
83 System.err.println("Error while waiting endstring. " + e.getMessage());
84 }
85 }
86 }