/* * Copyright (c) 2006, 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 6361557 * @run main/othervm B6361557 * @summary Lightweight HTTP server quickly runs out of file descriptors on Linux
*/
/** * 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
*/ publicclass B6361557 {
publicstaticboolean error = false; staticfinalint NUM = 1000;
Selector selector = Selector.open (); int requests = 0; int responses = 0; while (true) { // we need to read responses from time to time: slightly // increase the timeout with the amount of pending responses // to give a chance to the server to reply. int selres = selector.select (requests - responses + 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)) {
System.out.print("_");
key.attach(null);
chan.close();
responses++;
}
} catch (IOException e) {
System.out.println(e);
}
}
} if (requests < NUM) {
System.out.print(".");
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 */ staticboolean responseComplete(ByteBuffer buf) { int pos = buf.position();
buf.flip(); byte[] lookingFor = newbyte[] {'\r', '\n', '\r', '\n' }; int lookingForCount = 0; while (buf.hasRemaining()) { byte b = buf.get(); if (b == lookingFor[lookingForCount]) {
lookingForCount++; if (lookingForCount == 4) { returntrue;
}
} else {
lookingForCount = 0;
}
}
buf.position(pos);
buf.limit(buf.capacity()); returnfalse;
}
}
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