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117 lines
4.4 KiB
117 lines
4.4 KiB
//httpContentLengthInputStream.java
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//-----------------------
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//(C) by Michael Peter Christen; mc@anomic.de
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//first published on http://www.anomic.de
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//Frankfurt, Germany, 2004
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//
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// This file is contributed by Martin Thelian
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//
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// $LastChangedDate: 2006-09-15 17:01:25 +0200 (Fr, 15 Sep 2006) $
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// $LastChangedRevision: 2598 $
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// $LastChangedBy: theli $
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//
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//This program is free software; you can redistribute it and/or modify
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//it under the terms of the GNU General Public License as published by
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//the Free Software Foundation; either version 2 of the License, or
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//(at your option) any later version.
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//
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//This program is distributed in the hope that it will be useful,
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//but WITHOUT ANY WARRANTY; without even the implied warranty of
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//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//GNU General Public License for more details.
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//
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//You should have received a copy of the GNU General Public License
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//along with this program; if not, write to the Free Software
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//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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//Using this software in any meaning (reading, learning, copying, compiling,
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//running) means that you agree that the Author(s) is (are) not responsible
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//for cost, loss of data or any harm that may be caused directly or indirectly
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//by usage of this softare or this documentation. The usage of this software
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//is on your own risk. The installation and usage (starting/running) of this
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//software may allow other people or application to access your computer and
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//any attached devices and is highly dependent on the configuration of the
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//software which must be done by the user of the software; the author(s) is
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//(are) also not responsible for proper configuration and usage of the
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//software, even if provoked by documentation provided together with
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//the software.
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//
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//Any changes to this file according to the GPL as documented in the file
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//gpl.txt aside this file in the shipment you received can be done to the
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//lines that follows this copyright notice here, but changes must not be
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//done inside the copyright notive above. A re-distribution must contain
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//the intact and unchanged copyright notice.
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//Contributions and changes to the program code must be marked as such.
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package de.anomic.http;
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import java.io.IOException;
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import java.io.InputStream;
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public class httpContentLengthInputStream extends httpdByteCountInputStream {
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private long contentLength;
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private boolean closed = false;
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public httpContentLengthInputStream(InputStream inputStream, long contentLength) {
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super(inputStream);
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this.contentLength = contentLength;
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}
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public long getContentLength() {
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return this.contentLength;
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}
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public boolean isClosed() {
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return this.closed;
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}
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/**
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* Closes this input stream.
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* <b>Attention:</b> This does not close the wrapped input stream, because
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* otherwise keep-alive connections would terminate
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*/
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public void close() throws IOException {
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if (!this.closed) {
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try {
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// read to the end of the stream and throw read bytes away
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httpChunkedInputStream.exhaustInputStream(this);
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} finally {
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this.closed = true;
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}
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}
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}
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public int read() throws IOException {
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if (this.closed) throw new IOException("Stream already closed.");
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// if we have already finished reading ...
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if (this.byteCount >= this.contentLength) return -1;
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return super.read();
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}
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public int read(byte[] buffer) throws IOException {
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return read(buffer, 0, buffer.length);
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}
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public int read(byte[] buffer, int off, int len) throws IOException {
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if (this.closed) throw new IOException("Stream already closed.");
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// if we have already finished reading ...
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if (this.byteCount >= this.contentLength) return -1;
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// only read until body end
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if (this.byteCount + len > this.contentLength) {
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len = (int) (this.contentLength - this.byteCount);
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}
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return super.read(buffer, off, len);
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}
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public long skip(long len) throws IOException {
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long skipLength = Math.min(len, this.contentLength - this.byteCount);
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return super.skip(skipLength);
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}
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}
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