J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2001 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /** |
| 25 | * |
| 26 | * @bug 4333920 |
| 27 | * @bug 4394548 |
| 28 | * @summary Check that chunked encoding response doesn't cause |
| 29 | * getInputStream to block until last chunk arrives. |
| 30 | * Also regression against NPE in ChunkedInputStream. |
| 31 | */ |
| 32 | import java.net.*; |
| 33 | import java.io.*; |
| 34 | import java.util.Random; |
| 35 | |
| 36 | public class ChunkedEncoding implements Runnable { |
| 37 | |
| 38 | ServerSocket ss; |
| 39 | |
| 40 | /* |
| 41 | * Our "http" server to return a chunked response |
| 42 | */ |
| 43 | public void run() { |
| 44 | try { |
| 45 | Socket s = ss.accept(); |
| 46 | |
| 47 | PrintStream out = new PrintStream( |
| 48 | new BufferedOutputStream( |
| 49 | s.getOutputStream() )); |
| 50 | |
| 51 | /* send the header */ |
| 52 | out.print("HTTP/1.1 200\r\n"); |
| 53 | out.print("Transfer-Encoding: chunked\r\n"); |
| 54 | out.print("Content-Type: text/html\r\n"); |
| 55 | out.print("\r\n"); |
| 56 | out.flush(); |
| 57 | |
| 58 | /* delay the server before first chunk */ |
| 59 | Thread.sleep(5000); |
| 60 | |
| 61 | /* |
| 62 | * Our response will be of random length |
| 63 | * but > 32k |
| 64 | */ |
| 65 | Random rand = new Random(); |
| 66 | |
| 67 | int len; |
| 68 | do { |
| 69 | len = rand.nextInt(128*1024); |
| 70 | } while (len < 32*1024); |
| 71 | |
| 72 | /* |
| 73 | * Our chunk size will be 2-32k |
| 74 | */ |
| 75 | int chunkSize; |
| 76 | do { |
| 77 | chunkSize = rand.nextInt(len / 3); |
| 78 | } while (chunkSize < 2*1024); |
| 79 | |
| 80 | /* |
| 81 | * Generate random content and check sum it |
| 82 | */ |
| 83 | byte buf[] = new byte[len]; |
| 84 | int cs = 0; |
| 85 | for (int i=0; i<len; i++) { |
| 86 | buf[i] = (byte)('a' + rand.nextInt(26)); |
| 87 | cs = (cs + buf[i]) % 65536; |
| 88 | } |
| 89 | |
| 90 | /* |
| 91 | * Stream the chunks to the client |
| 92 | */ |
| 93 | int remaining = len; |
| 94 | int pos = 0; |
| 95 | while (remaining > 0) { |
| 96 | int size = Math.min(remaining, chunkSize); |
| 97 | out.print( Integer.toHexString(size) ); |
| 98 | out.print("\r\n"); |
| 99 | out.write( buf, pos, size ); |
| 100 | pos += size; |
| 101 | remaining -= size; |
| 102 | out.print("\r\n"); |
| 103 | out.flush(); |
| 104 | } |
| 105 | |
| 106 | /* send EOF chunk */ |
| 107 | out.print("0\r\n"); |
| 108 | out.flush(); |
| 109 | |
| 110 | /* |
| 111 | * Send trailer with checksum |
| 112 | */ |
| 113 | String trailer = "Checksum:" + cs + "\r\n"; |
| 114 | out.print(trailer); |
| 115 | out.print("\r\n"); |
| 116 | out.flush(); |
| 117 | |
| 118 | s.close(); |
| 119 | ss.close(); |
| 120 | } catch (Exception e) { |
| 121 | e.printStackTrace(); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | ChunkedEncoding() throws Exception { |
| 126 | |
| 127 | /* start the server */ |
| 128 | ss = new ServerSocket(0); |
| 129 | (new Thread(this)).start(); |
| 130 | |
| 131 | /* establish http connection to server */ |
| 132 | String uri = "http://localhost:" + |
| 133 | Integer.toString(ss.getLocalPort()) + |
| 134 | "/foo"; |
| 135 | URL url = new URL(uri); |
| 136 | HttpURLConnection http = (HttpURLConnection)url.openConnection(); |
| 137 | |
| 138 | /* |
| 139 | * Server should only send headers if TE:trailers |
| 140 | * specified - see updated HTTP 1.1 spec. |
| 141 | */ |
| 142 | http.setRequestProperty("TE", "trailers"); |
| 143 | |
| 144 | /* Time how long the getInputStream takes */ |
| 145 | long ts = System.currentTimeMillis(); |
| 146 | InputStream in = http.getInputStream(); |
| 147 | long te = System.currentTimeMillis(); |
| 148 | |
| 149 | /* |
| 150 | * If getInputStream takes >2 seconds it probably means |
| 151 | * that the implementation is waiting for the chunks to |
| 152 | * arrive. |
| 153 | */ |
| 154 | if ( (te-ts) > 2000) { |
| 155 | throw new Exception("getInputStream didn't return immediately"); |
| 156 | } |
| 157 | |
| 158 | /* |
| 159 | * Read the stream and checksum it as it arrives |
| 160 | */ |
| 161 | int nread; |
| 162 | int cs = 0; |
| 163 | byte b[] = new byte[1024]; |
| 164 | do { |
| 165 | nread = in.read(b); |
| 166 | if (nread > 0) { |
| 167 | for (int i=0; i<nread; i++) { |
| 168 | cs = (cs + b[i]) % 65536; |
| 169 | } |
| 170 | } |
| 171 | } while (nread > 0); |
| 172 | |
| 173 | /* |
| 174 | * Verify that the checksums match |
| 175 | */ |
| 176 | String trailer = http.getHeaderField("Checksum"); |
| 177 | if (trailer == null) { |
| 178 | throw new Exception("Checksum trailer missing from response"); |
| 179 | } |
| 180 | int rcvd_cs = Integer.parseInt(trailer); |
| 181 | if (rcvd_cs != cs) { |
| 182 | throw new Exception("Trailer checksum doesn't equal calculated checksum"); |
| 183 | } |
| 184 | |
| 185 | http.disconnect(); |
| 186 | |
| 187 | } |
| 188 | |
| 189 | public static void main(String args[]) throws Exception { |
| 190 | new ChunkedEncoding(); |
| 191 | } |
| 192 | |
| 193 | } |