/* * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.net.httpserver; import java.io.*;import java.net.*;import com.sun.net.httpserver.*;import com.sun.net.httpserver.spi.*; /** * a class which allows the caller to write up to a defined * number of bytes to an underlying stream. The caller *must* * write the pre-defined number or else an exception will be thrown * and the whole request aborted. * normal close() does not close the underlying stream */ class FixedLengthOutputStream extends FilterOutputStream{    private long remaining;    private boolean eof = false;    private boolean closed = false;    ExchangeImpl t;     FixedLengthOutputStream (ExchangeImpl t, OutputStream src, long len) {        super (src);        this.t = t;        this.remaining = len;    }     public void write (int b) throws IOException {        if (closed) {            throw new IOException ("stream closed");        }        eof = (remaining == 0);        if (eof) {            throw new StreamClosedException();        }        out.write(b);        remaining --;    }     public void write (byte[]b, int off, int len) throws IOException {        if (closed) {            throw new IOException ("stream closed");        }        eof = (remaining == 0);        if (eof) {            throw new StreamClosedException();        }        if (len > remaining) {            // stream is still open, caller can retry            throw new IOException ("too many bytes to write to stream");        }        out.write(b, off, len);        remaining -= len;    }     public void close () throws IOException {        if (closed) {            return;        }        closed = true;        if (remaining > 0) {            t.close();            throw new IOException ("insufficient bytes written to stream");        }        flush();        eof = true;        LeftOverInputStream is = t.getOriginalInputStream();        if (!is.isClosed()) {            try {                is.close();            } catch (IOException e) {}        }        WriteFinishedEvent e = new WriteFinishedEvent (t);        t.getHttpContext().getServerImpl().addEvent (e);    }     // flush is a pass-through}