1 /* 2 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 6299712 27 * @library ../../httptest/ 28 * @build HttpCallback HttpServer ClosedChannelList HttpTransaction 29 * @run main/othervm B6299712 30 * @summary NullPointerException in sun.net.www.protocol.http.HttpURLConnection.followRedirect 31 */ 32 33 import java.net.*; 34 import java.io.*; 35 import java.util.*; 36 37 /* 38 * Test Description: 39 * - main thread run as a http client 40 * - another thread runs a http server, which redirect the first call to "/redirect" 41 * and return '200 OK' for the successive call 42 * - a global ResponseCache instance is installed, which return DeployCacheResponse 43 * for url ends with "/redirect", i.e. the url redirected to by our simple http server, 44 * and null for other url. 45 * - the whole result is that the first call will be served by our simple 46 * http server and is redirected to "/redirect". The successive call will be done 47 * automatically by HttpURLConnection, which will be served by DeployCacheResponse. 48 * The NPE will be thrown on the second round if the bug is there. 49 */ 50 public class B6299712 { 51 static SimpleHttpTransaction httpTrans; 52 static HttpServer server; 53 54 public static void main(String[] args) throws Exception { 55 ResponseCache.setDefault(new DeployCacheHandler()); 56 startHttpServer(); 57 58 makeHttpCall(); 59 } 60 61 public static void startHttpServer() { 62 try { 63 httpTrans = new SimpleHttpTransaction(); 64 server = new HttpServer(httpTrans, 1, 10, 0); 65 } catch (IOException e) { 66 e.printStackTrace(); 67 } 68 } 69 70 public static void makeHttpCall() { 71 try { 72 System.out.println("http server listen on: " + server.getLocalPort()); 73 URL url = new URL("http" , InetAddress.getLocalHost().getHostAddress(), 74 server.getLocalPort(), "/"); 75 HttpURLConnection uc = (HttpURLConnection)url.openConnection(); 76 System.out.println(uc.getResponseCode()); 77 } catch (IOException e) { 78 e.printStackTrace(); 79 } finally { 80 server.terminate(); 81 } 82 } 83 } 84 85 class SimpleHttpTransaction implements HttpCallback { 86 /* 87 * Our http server which simply redirect first call 88 */ 89 public void request(HttpTransaction trans) { 90 try { 91 String path = trans.getRequestURI().getPath(); 92 if (path.equals("/")) { 93 // the first call, redirect it 94 String location = "/redirect"; 95 trans.addResponseHeader("Location", location); 96 trans.sendResponse(302, "Moved Temporarily"); 97 } else { 98 // the second call 99 trans.sendResponse(200, "OK"); 100 } 101 } catch (Exception e) { 102 e.printStackTrace(); 103 } 104 } 105 } 106 107 class DeployCacheHandler extends java.net.ResponseCache { 108 private boolean inCacheHandler = false; 109 private boolean _downloading = false; 110 111 public synchronized CacheResponse get(final URI uri, String rqstMethod, 112 Map requestHeaders) throws IOException { 113 System.out.println("get!!!: " + uri); 114 try { 115 if (!uri.toString().endsWith("redirect")) { 116 return null; 117 } 118 } catch (Exception e) { 119 e.printStackTrace(); 120 } 121 122 return new DeployCacheResponse(new EmptyInputStream(), new HashMap()); 123 } 124 125 public synchronized CacheRequest put(URI uri, URLConnection conn) 126 throws IOException { 127 URL url = uri.toURL(); 128 return new DeployCacheRequest(url, conn); 129 130 } 131 } 132 133 class DeployCacheRequest extends java.net.CacheRequest { 134 135 private URL _url; 136 private URLConnection _conn; 137 private boolean _downloading = false; 138 139 DeployCacheRequest(URL url, URLConnection conn) { 140 _url = url; 141 _conn = conn; 142 } 143 144 public void abort() { 145 146 } 147 148 public OutputStream getBody() throws IOException { 149 150 return null; 151 } 152 } 153 154 class DeployCacheResponse extends java.net.CacheResponse { 155 protected InputStream is; 156 protected Map headers; 157 158 DeployCacheResponse(InputStream is, Map headers) { 159 this.is = is; 160 this.headers = headers; 161 } 162 163 public InputStream getBody() throws IOException { 164 return is; 165 } 166 167 public Map getHeaders() throws IOException { 168 return headers; 169 } 170 } 171 172 class EmptyInputStream extends InputStream { 173 public EmptyInputStream() { 174 } 175 176 public int read() 177 throws IOException { 178 return -1; 179 } 180 }