J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005-2006 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any 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 up to a defined |
| 35 | * number of bytes to an underlying stream. The caller *must* |
| 36 | * write the pre-defined number or else an exception will be thrown |
| 37 | * and the whole request aborted. |
| 38 | * normal close() does not close the underlying stream |
| 39 | */ |
| 40 | |
| 41 | class FixedLengthOutputStream extends FilterOutputStream |
| 42 | { |
| 43 | private long remaining; |
| 44 | private boolean eof = false; |
| 45 | private boolean closed = false; |
| 46 | ExchangeImpl t; |
| 47 | |
| 48 | FixedLengthOutputStream (ExchangeImpl t, OutputStream src, long len) { |
| 49 | super (src); |
| 50 | this.t = t; |
| 51 | this.remaining = len; |
| 52 | } |
| 53 | |
| 54 | public void write (int b) throws IOException { |
| 55 | if (closed) { |
| 56 | throw new IOException ("stream closed"); |
| 57 | } |
| 58 | eof = (remaining == 0); |
| 59 | if (eof) { |
| 60 | throw new StreamClosedException(); |
| 61 | } |
| 62 | out.write(b); |
| 63 | remaining --; |
| 64 | } |
| 65 | |
| 66 | public void write (byte[]b, int off, int len) throws IOException { |
| 67 | if (closed) { |
| 68 | throw new IOException ("stream closed"); |
| 69 | } |
| 70 | eof = (remaining == 0); |
| 71 | if (eof) { |
| 72 | throw new StreamClosedException(); |
| 73 | } |
| 74 | if (len > remaining) { |
| 75 | // stream is still open, caller can retry |
| 76 | throw new IOException ("too many bytes to write to stream"); |
| 77 | } |
| 78 | out.write(b, off, len); |
| 79 | remaining -= len; |
| 80 | } |
| 81 | |
| 82 | public void close () throws IOException { |
| 83 | if (closed) { |
| 84 | return; |
| 85 | } |
| 86 | closed = true; |
| 87 | if (remaining > 0) { |
| 88 | t.close(); |
| 89 | throw new IOException ("insufficient bytes written to stream"); |
| 90 | } |
| 91 | flush(); |
| 92 | eof = true; |
| 93 | LeftOverInputStream is = t.getOriginalInputStream(); |
| 94 | if (!is.isClosed()) { |
| 95 | try { |
| 96 | is.close(); |
| 97 | } catch (IOException e) {} |
| 98 | } |
| 99 | WriteFinishedEvent e = new WriteFinishedEvent (t); |
| 100 | t.getHttpContext().getServerImpl().addEvent (e); |
| 101 | } |
| 102 | |
| 103 | // flush is a pass-through |
| 104 | } |