Showing the changes to java/pkg/sun/net/httpserver/ChunkedOutputStream.java (1 of 18352 files). Show all
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| 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 | +} | |