1/* 2 * Copyright (c) 2005, 2006, 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 26package sun.net.httpserver; 27 28import java.io.*; 29import java.net.*; 30import com.sun.net.httpserver.*; 31import 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 41class 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} 105