/* * Copyright (c) 2005, 2007, 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 com.sun.net.httpserver.*;import com.sun.net.httpserver.spi.*;/** * a (filter) input stream which can tell us if bytes are "left over" * on the underlying stream which can be read (without blocking) * on another instance of this class. * * The class can also report if all bytes "expected" to be read * were read, by the time close() was called. In that case, * bytes may be drained to consume them (by calling drain() ). * * isEOF() returns true, when all expected bytes have been read */abstract class LeftOverInputStream extends FilterInputStream { ExchangeImpl t; ServerImpl server; protected boolean closed = false; protected boolean eof = false; byte[] one = new byte [1]; public LeftOverInputStream (ExchangeImpl t, InputStream src) { super (src); this.t = t; this.server = t.getServerImpl(); } /** * if bytes are left over buffered on *the UNDERLYING* stream */ public boolean isDataBuffered () throws IOException { assert eof; return super.available() > 0; } public void close () throws IOException { if (closed) { return; } closed = true; if (!eof) { eof = drain (ServerConfig.getDrainAmount()); } } public boolean isClosed () { return closed; } public boolean isEOF () { return eof; } protected abstract int readImpl (byte[]b, int off, int len) throws IOException; public synchronized int read () throws IOException { if (closed) { throw new IOException ("Stream is closed"); } int c = readImpl (one, 0, 1); if (c == -1 || c == 0) { return c; } else { return one[0] & 0xFF; } } public synchronized int read (byte[]b, int off, int len) throws IOException { if (closed) { throw new IOException ("Stream is closed"); } return readImpl (b, off, len); } /** * read and discard up to l bytes or "eof" occurs, * (whichever is first). Then return true if the stream * is at eof (ie. all bytes were read) or false if not * (still bytes to be read) */ public boolean drain (long l) throws IOException { int bufSize = 2048; byte[] db = new byte [bufSize]; while (l > 0) { long len = readImpl (db, 0, bufSize); if (len == -1) { eof = true; return true; } else { l = l - len; } } return false; }}
/*
* Copyright (c) 2005, 2007, 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 com.sun.net.httpserver.*;
import com.sun.net.httpserver.spi.*;
/**
* a (filter) input stream which can tell us if bytes are "left over"
* on the underlying stream which can be read (without blocking)
* on another instance of this class.
*
* The class can also report if all bytes "expected" to be read
* were read, by the time close() was called. In that case,
* bytes may be drained to consume them (by calling drain() ).
*
* isEOF() returns true, when all expected bytes have been read
*/
abstract class LeftOverInputStream extends FilterInputStream {
ExchangeImpl t;
ServerImpl server;
protected boolean closed = false;
protected boolean eof = false;
byte[] one = new byte [1];
public LeftOverInputStream (ExchangeImpl t, InputStream src) {
super (src);
this.t = t;
this.server = t.getServerImpl();
}
/**
* if bytes are left over buffered on *the UNDERLYING* stream
*/
public boolean isDataBuffered () throws IOException {
assert eof;
return super.available() > 0;
}
public void close () throws IOException {
if (closed) {
return;
}
closed = true;
if (!eof) {
eof = drain (ServerConfig.getDrainAmount());
}
}
public boolean isClosed () {
return closed;
}
public boolean isEOF () {
return eof;
}
protected abstract int readImpl (byte[]b, int off, int len) throws IOException;
public synchronized int read () throws IOException {
if (closed) {
throw new IOException ("Stream is closed");
}
int c = readImpl (one, 0, 1);
if (c == -1 || c == 0) {
return c;
} else {
return one[0] & 0xFF;
}
}
public synchronized int read (byte[]b, int off, int len) throws IOException {
if (closed) {
throw new IOException ("Stream is closed");
}
return readImpl (b, off, len);
}
/**
* read and discard up to l bytes or "eof" occurs,
* (whichever is first). Then return true if the stream
* is at eof (ie. all bytes were read) or false if not
* (still bytes to be read)
*/
public boolean drain (long l) throws IOException {
int bufSize = 2048;
byte[] db = new byte [bufSize];
while (l > 0) {
long len = readImpl (db, 0, bufSize);
if (len == -1) {
eof = true;
return true;
} else {
l = l - len;
}
}
return false;
}
}