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
|
/*
* Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 4521942
* @summary Ensure that InputStreamReaders work properly
* when the underlying byte stream times out
*/
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.InterruptedIOException;
import java.io.OutputStreamWriter;
import java.io.PrintStream;
import java.io.Reader;
import java.io.Writer;
import java.net.ServerSocket;
import java.net.Socket;
public class StreamTimeout {
static final PrintStream log = System.err;
static String charset = "US-ASCII";
private static class Client extends Thread implements Closeable {
private final Socket so;
Client(int port) throws IOException {
so = new Socket("127.0.0.1", port);
}
@Override
public void run() {
try {
Writer wr = new OutputStreamWriter(so.getOutputStream(),
charset);
wr.write("ab");
wr.flush();
} catch (IOException x) {
log.print("Unexpected exception in writer: ");
x.printStackTrace();
}
}
@Override
public void close() throws IOException {
so.close();
}
}
private static void gobble(InputStream is, Reader rd,
int ec, boolean force)
throws Exception
{
int a = is.available();
boolean r = rd.ready();
log.print("" + a + " bytes available, "
+ "reader " + (r ? "" : "not ") + "ready");
if (!r && !force) {
log.println();
return;
}
int c;
try {
c = rd.read();
} catch (InterruptedIOException x) {
log.println();
throw x;
}
log.println(", read() ==> "
+ (c >= 0 ? ("'" + (char)c + "'" ): "EOF"));
if (c != ec)
throw new Exception("Incorrect value read: Expected "
+ ec + ", read " + (char)c);
}
public static void main(String[] args) throws Exception {
if (args.length > 0)
charset = args[0];
try(ServerSocket ss = new ServerSocket(0);
Client cl = new Client(ss.getLocalPort())) {
cl.start();
try(Socket s = ss.accept()) {
s.setSoTimeout(150);
try(InputStream is = s.getInputStream();
Reader rd = new InputStreamReader(is, charset)) {
while (is.available() <= 0)
Thread.yield();
gobble(is, rd, 'a', false);
gobble(is, rd, 'b', false);
gobble(is, rd, -1, false);
boolean caught = false;
try {
gobble(is, rd, -1, true);
} catch (InterruptedIOException e) {
log.println("Read timed out, as expected");
caught = true;
}
if (!caught) {
log.println("Read did not time out, test inapplicable");
return;
}
caught = false;
try {
gobble(is, rd, -1, true);
} catch (InterruptedIOException x) {
log.println("Second read timed out, as expected");
caught = true;
}
if (!caught)
throw new Exception("Second read completed");
}
}
cl.join();
}
}
}
|
