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/*******************************************************************************
* Copyright (c) 2001, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.ws.internal.explorer.platform.wsdl.transport;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
public class ChunkedInputStream extends FilterInputStream
{
protected long chunkSize = 0l;
protected volatile boolean closed = false;
private static final int maxCharLong = (Long.toHexString(Long.MAX_VALUE)).toString().length();
private ChunkedInputStream()
{
super(null);
}
public ChunkedInputStream(InputStream is)
{
super(is);
}
public int read() throws IOException
{
byte[] d = new byte[1];
int rc = read(d, 0, 1);
return rc > 0 ? (d[0] & 0xFF) : rc;
}
public int read(byte[] b) throws IOException
{
return read(b, 0, b.length);
}
public synchronized int read(byte[] b, int off, int len) throws IOException
{
if (closed)
return -1;
int totalread = 0;
int bytesread = 0;
try
{
do
{
if (chunkSize < 1L)
{
if (0l == getChunked())
{
if (totalread == 0)
return -1;
else
return totalread;
}
}
bytesread = in.read(b, off + totalread, Math.min(len - totalread, (int) Math.min(chunkSize, Integer.MAX_VALUE)));
if (bytesread > 0)
{
totalread += bytesread;
chunkSize -= bytesread;
}
}
while (len - totalread > 0 && bytesread > -1);
}
catch (IOException e)
{
closed = true;
throw e;
}
return totalread;
}
public long skip(final long n) throws IOException
{
if (closed)
return 0;
long skipped = 0l;
byte[] b = new byte[1024];
int bread = -1;
do
{
bread = read(b, 0, b.length);
if (bread > 0)
skipped += bread;
}
while (bread != -1 && skipped < n);
return skipped;
}
public int available() throws IOException
{
if (closed)
return 0;
int rc = (int) Math.min(chunkSize, Integer.MAX_VALUE);
return Math.min(rc, in.available());
}
protected long getChunked() throws IOException
{
//StringBuffer buf= new StringBuffer(1024);
byte[] buf = new byte[maxCharLong + 2];
int bufsz = 0;
chunkSize = -1L;
int c = -1;
do
{
c = in.read();
if (c > -1)
{
if (c != '\r' && c != '\n' && c != ' ' && c != '\t')
{
buf[bufsz++] = ((byte) c);
}
}
}
while (c > -1 && (c != '\n' || bufsz == 0) && bufsz < buf.length);
if (c < 0)
{
closed = true;
}
String sbuf = new String(buf, 0, bufsz);
if (bufsz > maxCharLong)
{
closed = true;
throw new IOException("Chunked input stream failed to receive valid chunk size:" + sbuf);
}
try
{
chunkSize = Long.parseLong(sbuf, 16);
}
catch (NumberFormatException ne)
{
closed = true;
throw new IOException("'" + sbuf + "' " + ne.getMessage());
}
if (chunkSize < 1L)
closed = true;
if (chunkSize != 0L && c < 0)
{
//If chunk size is zero try and be tolerant that there maybe no cr or lf
// at the end.
throw new IOException("HTTP Chunked stream closed in middle of chunk.");
}
if (chunkSize < 0L)
throw new IOException("HTTP Chunk size received " + chunkSize + " is less than zero.");
return chunkSize;
}
public void close() throws IOException
{
synchronized (this)
{
if (closed)
return;
closed = true;
}
byte[] b = new byte[1024];
int bread = -1;
do
{
bread = read(b, 0, b.length);
}
while (bread != -1);
}
/*
* public void mark(int readlimit)
* {
* }
*/
public void reset() throws IOException
{
throw new IOException("Don't support marked streams");
}
public boolean markSupported()
{
return false;
}
}
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