Showing the changes to java/pkg/sun/net/httpserver/ChunkedOutputStream.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,163 @@ | |||
| 1 | /* | ||
| 2 | * Copyright (c) 2005, 2008, 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.net.httpserver; | ||
| 27 | |||
| 28 | import java.io.*; | ||
| 29 | import java.net.*; | ||
| 30 | import com.sun.net.httpserver.*; | ||
| 31 | import com.sun.net.httpserver.spi.*; | ||
| 32 | |||
| 33 | /** | ||
| 34 | * a class which allows the caller to write an arbitrary | ||
| 35 | * number of bytes to an underlying stream. | ||
| 36 | * normal close() does not close the underlying stream | ||
| 37 | * | ||
| 38 | * This class is buffered. | ||
| 39 | * | ||
| 40 | * Each chunk is written in one go as :- | ||
| 41 | * abcd\r\nxxxxxxxxxxxxxx\r\n | ||
| 42 | * | ||
| 43 | * abcd is the chunk-size, and xxx is the chunk data | ||
| 44 | * If the length is less than 4 chars (in size) then the buffer | ||
| 45 | * is written with an offset. | ||
| 46 | * Final chunk is: | ||
| 47 | * 0\r\n\r\n | ||
| 48 | */ | ||
| 49 | |||
| 50 | class ChunkedOutputStream extends FilterOutputStream | ||
| 51 | { | ||
| 52 | private boolean closed = false; | ||
| 53 | /* max. amount of user data per chunk */ | ||
| 54 | final static int CHUNK_SIZE = 4096; | ||
| 55 | /* allow 4 bytes for chunk-size plus 4 for CRLFs */ | ||
| 56 | final static int OFFSET = 6; /* initial <=4 bytes for len + CRLF */ | ||
| 57 | private int pos = OFFSET; | ||
| 58 | private int count = 0; | ||
| 59 | private byte[] buf = new byte [CHUNK_SIZE+OFFSET+2]; | ||
| 60 | ExchangeImpl t; | ||
| 61 | |||
| 62 | ChunkedOutputStream (ExchangeImpl t, OutputStream src) { | ||
| 63 | super (src); | ||
| 64 | this.t = t; | ||
| 65 | } | ||
| 66 | |||
| 67 | public void write (int b) throws IOException { | ||
| 68 | if (closed) { | ||
| 69 | throw new StreamClosedException (); | ||
| 70 | } | ||
| 71 | buf [pos++] = (byte)b; | ||
| 72 | count ++; | ||
| 73 | if (count == CHUNK_SIZE) { | ||
| 74 | writeChunk(); | ||
| 75 | } | ||
| 76 | assert count < CHUNK_SIZE; | ||
| 77 | } | ||
| 78 | |||
| 79 | public void write (byte[]b, int off, int len) throws IOException { | ||
| 80 | if (closed) { | ||
| 81 | throw new StreamClosedException (); | ||
| 82 | } | ||
| 83 | int remain = CHUNK_SIZE - count; | ||
| 84 | if (len > remain) { | ||
| 85 | System.arraycopy (b,off,buf,pos,remain); | ||
| 86 | count = CHUNK_SIZE; | ||
| 87 | writeChunk(); | ||
| 88 | len -= remain; | ||
| 89 | off += remain; | ||
| 90 | while (len >= CHUNK_SIZE) { | ||
| 91 | System.arraycopy (b,off,buf,OFFSET,CHUNK_SIZE); | ||
| 92 | len -= CHUNK_SIZE; | ||
| 93 | off += CHUNK_SIZE; | ||
| 94 | count = CHUNK_SIZE; | ||
| 95 | writeChunk(); | ||
| 96 | } | ||
| 97 | } | ||
| 98 | if (len > 0) { | ||
| 99 | System.arraycopy (b,off,buf,pos,len); | ||
| 100 | count += len; | ||
| 101 | pos += len; | ||
| 102 | } | ||
| 103 | if (count == CHUNK_SIZE) { | ||
| 104 | writeChunk(); | ||
| 105 | } | ||
| 106 | } | ||
| 107 | |||
| 108 | /** | ||
| 109 | * write out a chunk , and reset the pointers | ||
| 110 | * chunk does not have to be CHUNK_SIZE bytes | ||
| 111 | * count must == number of user bytes (<= CHUNK_SIZE) | ||
| 112 | */ | ||
| 113 | private void writeChunk () throws IOException { | ||
| 114 | char[] c = Integer.toHexString (count).toCharArray(); | ||
| 115 | int clen = c.length; | ||
| 116 | int startByte = 4 - clen; | ||
| 117 | int i; | ||
| 118 | for (i=0; i<clen; i++) { | ||
| 119 | buf[startByte+i] = (byte)c[i]; | ||
| 120 | } | ||
| 121 | buf[startByte + (i++)] = '\r'; | ||
| 122 | buf[startByte + (i++)] = '\n'; | ||
| 123 | buf[startByte + (i++) + count] = '\r'; | ||
| 124 | buf[startByte + (i++) + count] = '\n'; | ||
| 125 | out.write (buf, startByte, i+count); | ||
| 126 | count = 0; | ||
| 127 | pos = OFFSET; | ||
| 128 | } | ||
| 129 | |||
| 130 | public void close () throws IOException { | ||
| 131 | if (closed) { | ||
| 132 | return; | ||
| 133 | } | ||
| 134 | flush(); | ||
| 135 | try { | ||
| 136 | /* write an empty chunk */ | ||
| 137 | writeChunk(); | ||
| 138 | out.flush(); | ||
| 139 | LeftOverInputStream is = t.getOriginalInputStream(); | ||
| 140 | if (!is.isClosed()) { | ||
| 141 | is.close(); | ||
| 142 | } | ||
| 143 | /* some clients close the connection before empty chunk is sent */ | ||
| 144 | } catch (IOException e) { | ||
| 145 | |||
| 146 | } finally { | ||
| 147 | closed = true; | ||
| 148 | } | ||
| 149 | |||
| 150 | WriteFinishedEvent e = new WriteFinishedEvent (t); | ||
| 151 | t.getHttpContext().getServerImpl().addEvent (e); | ||
| 152 | } | ||
| 153 | |||
| 154 | public void flush () throws IOException { | ||
| 155 | if (closed) { | ||
| 156 | throw new StreamClosedException (); | ||
| 157 | } | ||
| 158 | if (count > 0) { | ||
| 159 | writeChunk(); | ||
| 160 | } | ||
| 161 | out.flush(); | ||
| 162 | } | ||
| 163 | } | ||