J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005-2007 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 read up to a defined |
| 35 | * number of bytes off an underlying stream |
| 36 | * close() does not close the underlying stream |
| 37 | */ |
| 38 | |
| 39 | class FixedLengthInputStream extends LeftOverInputStream { |
| 40 | private int remaining; |
| 41 | |
| 42 | FixedLengthInputStream (ExchangeImpl t, InputStream src, int len) { |
| 43 | super (t, src); |
| 44 | this.remaining = len; |
| 45 | } |
| 46 | |
| 47 | protected int readImpl (byte[]b, int off, int len) throws IOException { |
| 48 | |
| 49 | eof = (remaining == 0); |
| 50 | if (eof) { |
| 51 | return -1; |
| 52 | } |
| 53 | if (len > remaining) { |
| 54 | len = remaining; |
| 55 | } |
| 56 | int n = in.read(b, off, len); |
| 57 | if (n > -1) { |
| 58 | remaining -= n; |
| 59 | } |
| 60 | return n; |
| 61 | } |
| 62 | |
| 63 | public int available () throws IOException { |
| 64 | if (eof) { |
| 65 | return 0; |
| 66 | } |
| 67 | int n = in.available(); |
| 68 | return n < remaining? n: remaining; |
| 69 | } |
| 70 | |
| 71 | public boolean markSupported () {return false;} |
| 72 | |
| 73 | public void mark (int l) { |
| 74 | } |
| 75 | |
| 76 | public void reset () throws IOException { |
| 77 | throw new IOException ("mark/reset not supported"); |
| 78 | } |
| 79 | } |