Java example source code file (RedirectLimit.java)
The RedirectLimit.java Java example source code/*
* Copyright (c) 2001, 2011, 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 4458085 7095949
* @summary Redirects Limited to 5
*/
/*
* Simulate a server that redirects ( to a different URL) 9 times
* and see if the client correctly follows the trail
*/
import java.io.*;
import java.net.*;
class RedirLimitServer extends Thread {
static final int TIMEOUT = 10 * 1000;
static final int NUM_REDIRECTS = 9;
static final String reply1 = "HTTP/1.1 307 Temporary Redirect\r\n" +
"Date: Mon, 15 Jan 2001 12:18:21 GMT\r\n" +
"Server: Apache/1.3.14 (Unix)\r\n" +
"Location: http://localhost:";
static final String reply2 = ".html\r\n" +
"Connection: close\r\n" +
"Content-Type: text/html; charset=iso-8859-1\r\n\r\n" +
"<html>Hello";
static final String reply3 = "HTTP/1.1 200 Ok\r\n" +
"Date: Mon, 15 Jan 2001 12:18:21 GMT\r\n" +
"Server: Apache/1.3.14 (Unix)\r\n" +
"Connection: close\r\n" +
"Content-Type: text/html; charset=iso-8859-1\r\n\r\n" +
"World";
final ServerSocket ss;
final int port;
RedirLimitServer(ServerSocket ss) throws IOException {
this.ss = ss;
port = this.ss.getLocalPort();
this.ss.setSoTimeout(TIMEOUT);
}
static final byte[] requestEnd = new byte[] {'\r', '\n', '\r', '\n' };
// Read until the end of a HTTP request
void readOneRequest(InputStream is) throws IOException {
int requestEndCount = 0, r;
while ((r = is.read()) != -1) {
if (r == requestEnd[requestEndCount]) {
requestEndCount++;
if (requestEndCount == 4) {
break;
}
} else {
requestEndCount = 0;
}
}
}
public void run() {
try {
for (int i=0; i<NUM_REDIRECTS; i++) {
try (Socket s = ss.accept()) {
s.setSoTimeout(TIMEOUT);
readOneRequest(s.getInputStream());
String reply = reply1 + port + "/redirect" + i + reply2;
s.getOutputStream().write(reply.getBytes());
}
}
try (Socket s = ss.accept()) {
s.setSoTimeout(TIMEOUT);
readOneRequest(s.getInputStream());
s.getOutputStream().write(reply3.getBytes());
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try { ss.close(); } catch (IOException unused) {}
}
}
};
public class RedirectLimit {
public static void main(String[] args) throws Exception {
ServerSocket ss = new ServerSocket (0);
int port = ss.getLocalPort();
RedirLimitServer server = new RedirLimitServer(ss);
server.start();
URL url = new URL("http://localhost:" + port);
URLConnection conURL = url.openConnection();
conURL.setDoInput(true);
conURL.setAllowUserInteraction(false);
conURL.setUseCaches(false);
try (InputStream in = conURL.getInputStream()) {
if ((in.read() != (int)'W') || (in.read()!=(int)'o')) {
throw new RuntimeException("Unexpected string read");
}
}
}
}
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