/*
* Copyright ( c ) 2010 , 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 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.InetAddress;
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(InetAddress.getLoopbackAddress(), 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();
}
}
}
Messung V0.5 in Prozent C=99 H=84 G=91
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-10-11)
¤
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