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) 2006, 2010, 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 6361557
* @run main/othervm B6361557
* @summary Lightweight HTTP server quickly runs out of file descriptors on Linux
*/
import com.sun.net.httpserver.*;
import java.util.*;
import java.util.concurrent.*;
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
import java.net.*;
/**
* The test simply opens 1,000 separate connections
* and invokes one http request on each. The client does
* not close any sockets until after they are closed
* by the server. This verifies the basic ability
* of the server to manage a reasonable number of connections
*/
public class B6361557 {
public static boolean error = false;
static final int NUM = 1000;
static class Handler implements HttpHandler {
int invocation = 1;
public void handle (HttpExchange t)
throws IOException
{
InputStream is = t.getRequestBody();
Headers map = t.getRequestHeaders();
Headers rmap = t.getResponseHeaders();
while (is.read () != -1) ;
is.close();
t.sendResponseHeaders (200, -1);
t.close();
}
}
final static String request = "GET /test/foo.html HTTP/1.1\r\nContent-length: 0\r\n\r\n";
final static ByteBuffer requestBuf = ByteBuffer.allocate(64).put(request.getBytes());
public static void main (String[] args) throws Exception {
Handler handler = new Handler();
InetSocketAddress addr = new InetSocketAddress (0);
HttpServer server = HttpServer.create (addr, 0);
HttpContext ctx = server.createContext ("/test", handler);
ExecutorService executor = Executors.newCachedThreadPool();
server.setExecutor (executor);
server.start ();
InetSocketAddress destaddr = new InetSocketAddress (
"127.0.0.1", server.getAddress().getPort()
);
System.out.println ("destaddr " + destaddr);
Selector selector = Selector.open ();
int requests = 0;
int responses = 0;
while (true) {
int selres = selector.select (1);
Set<SelectionKey> selkeys = selector.selectedKeys();
for (SelectionKey key : selkeys) {
if (key.isReadable()) {
SocketChannel chan = (SocketChannel)key.channel();
ByteBuffer buf = (ByteBuffer)key.attachment();
try {
int x = chan.read(buf);
if (x == -1 || responseComplete(buf)) {
key.attach(null);
chan.close();
responses++;
}
} catch (IOException e) {}
}
}
if (requests < NUM) {
SocketChannel schan = SocketChannel.open(destaddr);
requestBuf.rewind();
int c = 0;
while (requestBuf.remaining() > 0) {
c += schan.write(requestBuf);
}
schan.configureBlocking(false);
schan.register(selector, SelectionKey.OP_READ, ByteBuffer.allocate(100));
requests++;
}
if (responses == NUM) {
System.out.println ("Finished clients");
break;
}
}
server.stop (1);
selector.close();
executor.shutdown ();
}
/* Look for CR LF CR LF */
static boolean responseComplete(ByteBuffer buf) {
int pos = buf.position();
buf.flip();
byte[] lookingFor = new byte[] {'\r', '\n', '\r', '\n' };
int lookingForCount = 0;
while (buf.hasRemaining()) {
byte b = buf.get();
if (b == lookingFor[lookingForCount]) {
lookingForCount++;
if (lookingForCount == 4) {
return true;
}
} else {
lookingForCount = 0;
}
}
buf.position(pos);
buf.limit(buf.capacity());
return false;
}
}
|
