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/*
* Copyright (c) 1998, 2019, 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 4091859 8189366
* @library /test/lib
* @summary Test Socket.available()
* @run main CloseAvailable
* @run main/othervm -Djava.net.preferIPv4Stack=true CloseAvailable
*/
import java.net.*;
import java.io.*;
import jdk.test.lib.net.IPSupport;
public class CloseAvailable {
public static void main(String[] args) throws Exception {
IPSupport.throwSkippedExceptionIfNonOperational();
testClose();
testEOF(true);
testEOF(false);
testIOEOnClosed(true);
testIOEOnClosed(false);
}
static void testClose() throws IOException {
boolean error = true;
InetAddress addr = InetAddress.getLocalHost();
ServerSocket ss = new ServerSocket(0, 0, addr);
int port = ss.getLocalPort();
Thread t = new Thread(new Thread("Close-Available-1") {
public void run() {
try {
Socket s = new Socket(addr, port);
s.close();
} catch (Exception e) {
e.printStackTrace();
}
}
});
t.start();
Socket soc = ss.accept();
ss.close();
DataInputStream is = new DataInputStream(soc.getInputStream());
is.close();
try {
is.available();
}
catch (IOException ex) {
error = false;
}
if (error)
throw new RuntimeException("Available() can be called after stream closed.");
}
// Verifies consistency of `available` behaviour when EOF reached, both
// explicitly and implicitly.
static void testEOF(boolean readUntilEOF) throws IOException {
System.out.println("testEOF, readUntilEOF: " + readUntilEOF);
InetAddress addr = InetAddress.getLoopbackAddress();
ServerSocket ss = new ServerSocket();
ss.bind(new InetSocketAddress(addr, 0), 0);
int port = ss.getLocalPort();
try (Socket s = new Socket(addr, port)) {
s.getOutputStream().write(0x42);
s.shutdownOutput();
try (Socket soc = ss.accept()) {
ss.close();
InputStream is = soc.getInputStream();
int b = is.read();
assert b == 0x42;
assert !s.isClosed();
if (readUntilEOF) {
b = is.read();
assert b == -1;
}
int a;
for (int i = 0; i < 100; i++) {
a = is.available();
System.out.print(a + ", ");
if (a != 0)
throw new RuntimeException("Unexpected non-zero available: " + a);
}
assert !s.isClosed();
assert is.read() == -1;
}
}
System.out.println("\ncomplete");
}
// Verifies IOException thrown by `available`, on a closed input stream
// that may, or may not, have reached EOF prior to closure.
static void testIOEOnClosed(boolean readUntilEOF) throws IOException {
System.out.println("testIOEOnClosed, readUntilEOF: " + readUntilEOF);
InetAddress addr = InetAddress.getLoopbackAddress();
ServerSocket ss = new ServerSocket();
ss.bind(new InetSocketAddress(addr, 0), 0);
int port = ss.getLocalPort();
try (Socket s = new Socket(addr, port)) {
s.getOutputStream().write(0x43);
s.shutdownOutput();
try (Socket soc = ss.accept()) {
ss.close();
InputStream is = soc.getInputStream();
int b = is.read();
assert b == 0x43;
assert !s.isClosed();
if (readUntilEOF) {
b = is.read();
assert b == -1;
}
is.close();
try {
b = is.available();
throw new RuntimeException("UNEXPECTED successful read: " + b);
} catch (IOException expected) {
System.out.println("caught expected IOException:" + expected);
}
}
}
System.out.println("\ncomplete");
}
}
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