| /* |
| * Copyright (c) 2002, 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 4636331 |
| * @summary Check that URLClassLoader doesn't create excessive http |
| * connections |
| */ |
| import java.net.*; |
| import java.io.*; |
| import java.util.*; |
| |
| public class HttpTest { |
| |
| /* |
| * Simple http server to service http requests. Auto shutdown |
| * if "idle" (no requests) for 10 seconds. Forks worker thread |
| * to service persistent connections. Work threads shutdown if |
| * "idle" for 5 seconds. |
| */ |
| static class HttpServer implements Runnable { |
| |
| private static HttpServer svr = null; |
| private static Counters cnts = null; |
| private static ServerSocket ss; |
| |
| private static Object counterLock = new Object(); |
| private static int getCount = 0; |
| private static int headCount = 0; |
| |
| class Worker extends Thread { |
| Socket s; |
| Worker(Socket s) { |
| this.s = s; |
| } |
| |
| public void run() { |
| InputStream in = null; |
| try { |
| in = s.getInputStream(); |
| for (;;) { |
| |
| // read entire request from client |
| byte b[] = new byte[1024]; |
| int n, total=0; |
| |
| // max 5 seconds to wait for new request |
| s.setSoTimeout(5000); |
| try { |
| do { |
| n = in.read(b, total, b.length-total); |
| // max 0.5 seconds between each segment |
| // of request. |
| s.setSoTimeout(500); |
| if (n > 0) total += n; |
| } while (n > 0); |
| } catch (SocketTimeoutException e) { } |
| |
| if (total == 0) { |
| s.close(); |
| return; |
| } |
| |
| boolean getRequest = false; |
| if (b[0] == 'G' && b[1] == 'E' && b[2] == 'T') |
| getRequest = true; |
| |
| synchronized (counterLock) { |
| if (getRequest) |
| getCount++; |
| else |
| headCount++; |
| } |
| |
| // response to client |
| PrintStream out = new PrintStream( |
| new BufferedOutputStream( |
| s.getOutputStream() )); |
| out.print("HTTP/1.1 200 OK\r\n"); |
| |
| out.print("Content-Length: 75000\r\n"); |
| out.print("\r\n"); |
| if (getRequest) { |
| for (int i=0; i<75*1000; i++) { |
| out.write( (byte)'.' ); |
| } |
| } |
| out.flush(); |
| |
| } // for |
| |
| } catch (Exception e) { |
| unexpected(e); |
| } finally { |
| if (in != null) { try {in.close(); } catch(IOException e) {unexpected(e);} } |
| } |
| } |
| } |
| |
| HttpServer() throws Exception { |
| ss = new ServerSocket(0); |
| } |
| |
| public void run() { |
| try { |
| // shutdown if no request in 10 seconds. |
| ss.setSoTimeout(10000); |
| for (;;) { |
| Socket s = ss.accept(); |
| (new Worker(s)).start(); |
| } |
| } catch (Exception e) { |
| } |
| } |
| |
| void unexpected(Exception e) { |
| System.out.println(e); |
| e.printStackTrace(); |
| } |
| |
| public static HttpServer create() throws Exception { |
| if (svr != null) |
| return svr; |
| cnts = new Counters(); |
| svr = new HttpServer(); |
| (new Thread(svr)).start(); |
| return svr; |
| } |
| |
| public static void shutdown() throws Exception { |
| if (svr != null) { |
| ss.close(); |
| svr = null; |
| } |
| } |
| |
| public int port() { |
| return ss.getLocalPort(); |
| } |
| |
| public static class Counters { |
| public void reset() { |
| synchronized (counterLock) { |
| getCount = 0; |
| headCount = 0; |
| } |
| } |
| |
| public int getCount() { |
| synchronized (counterLock) { |
| return getCount; |
| } |
| } |
| |
| public int headCount() { |
| synchronized (counterLock) { |
| return headCount; |
| } |
| } |
| |
| public String toString() { |
| synchronized (counterLock) { |
| return "GET count: " + getCount + "; " + |
| "HEAD count: " + headCount; |
| } |
| } |
| } |
| |
| public Counters counters() { |
| return cnts; |
| } |
| |
| } |
| |
| public static void main(String args[]) throws Exception { |
| boolean failed = false; |
| |
| // create http server |
| HttpServer svr = HttpServer.create(); |
| |
| // create class loader |
| URL urls[] = |
| { new URL("http://localhost:" + svr.port() + "/dir1/"), |
| new URL("http://localhost:" + svr.port() + "/dir2/") }; |
| URLClassLoader cl = new URLClassLoader(urls); |
| |
| // Test 1 - check that getResource does single HEAD request |
| svr.counters().reset(); |
| URL url = cl.getResource("foo.gif"); |
| System.out.println(svr.counters()); |
| |
| if (svr.counters().getCount() > 0 || |
| svr.counters().headCount() > 1) { |
| failed = true; |
| } |
| |
| // Test 2 - check that getResourceAsStream does at most |
| // one GET request |
| svr.counters().reset(); |
| InputStream in = cl.getResourceAsStream("foo2.gif"); |
| in.close(); |
| System.out.println(svr.counters()); |
| if (svr.counters().getCount() > 1) { |
| failed = true; |
| } |
| |
| // Test 3 - check that getResources only does HEAD requests |
| svr.counters().reset(); |
| Enumeration e = cl.getResources("foos.gif"); |
| try { |
| for (;;) { |
| e.nextElement(); |
| } |
| } catch (NoSuchElementException exc) { } |
| System.out.println(svr.counters()); |
| if (svr.counters().getCount() > 1) { |
| failed = true; |
| } |
| |
| // shutdown http server |
| svr.shutdown(); |
| |
| if (failed) { |
| throw new Exception("Excessive http connections established - Test failed"); |
| } |
| } |
| |
| } |