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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.catalina.connector;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import org.apache.catalina.security.SecurityUtil;
import org.apache.tomcat.util.res.StringManager;
/**
* This class handles reading bytes.
*
* @author Remy Maucherat
*/
public class CoyoteInputStream extends ServletInputStream {
protected static final StringManager sm = StringManager.getManager(CoyoteInputStream.class);
protected InputBuffer ib;
protected CoyoteInputStream(InputBuffer ib) {
this.ib = ib;
}
/**
* Clear facade.
*/
void clear() {
ib = null;
}
/**
* Prevent cloning the facade.
*/
@Override
protected Object clone() throws CloneNotSupportedException {
throw new CloneNotSupportedException();
}
@Override
public int read() throws IOException {
checkNonBlockingRead();
if (SecurityUtil.isPackageProtectionEnabled()) {
try {
Integer result = AccessController.doPrivileged(new PrivilegedRead(ib));
return result.intValue();
} catch (PrivilegedActionException pae) {
Exception e = pae.getException();
if (e instanceof IOException) {
throw (IOException) e;
} else {
throw new RuntimeException(e.getMessage(), e);
}
}
} else {
return ib.readByte();
}
}
@Override
public int available() throws IOException {
if (SecurityUtil.isPackageProtectionEnabled()) {
try {
Integer result = AccessController.doPrivileged(new PrivilegedAvailable(ib));
return result.intValue();
} catch (PrivilegedActionException pae) {
Exception e = pae.getException();
if (e instanceof IOException) {
throw (IOException) e;
} else {
throw new RuntimeException(e.getMessage(), e);
}
}
} else {
return ib.available();
}
}
@Override
public int read(final byte[] b) throws IOException {
return read(b, 0, b.length);
}
@Override
public int read(final byte[] b, final int off, final int len) throws IOException {
checkNonBlockingRead();
if (SecurityUtil.isPackageProtectionEnabled()) {
try {
Integer result = AccessController.doPrivileged(
new PrivilegedReadArray(ib, b, off, len));
return result.intValue();
} catch (PrivilegedActionException pae) {
Exception e = pae.getException();
if (e instanceof IOException) {
throw (IOException) e;
} else {
throw new RuntimeException(e.getMessage(), e);
}
}
} else {
return ib.read(b, off, len);
}
}
/**
* Transfers bytes from the buffer to the specified ByteBuffer. After the
* operation the position of the ByteBuffer will be returned to the one
* before the operation, the limit will be the position incremented by
* the number of the transferred bytes.
*
* @param b the ByteBuffer into which bytes are to be written.
* @return an integer specifying the actual number of bytes read, or -1 if
* the end of the stream is reached
* @throws IOException if an input or output exception has occurred
*/
public int read(final ByteBuffer b) throws IOException {
checkNonBlockingRead();
if (SecurityUtil.isPackageProtectionEnabled()) {
try {
Integer result = AccessController.doPrivileged(new PrivilegedReadBuffer(ib, b));
return result.intValue();
} catch (PrivilegedActionException pae) {
Exception e = pae.getException();
if (e instanceof IOException) {
throw (IOException) e;
} else {
throw new RuntimeException(e.getMessage(), e);
}
}
} else {
return ib.read(b);
}
}
/**
* Close the stream
* Since we re-cycle, we can't allow the call to super.close()
* which would permanently disable us.
*/
@Override
public void close() throws IOException {
if (SecurityUtil.isPackageProtectionEnabled()) {
try {
AccessController.doPrivileged(new PrivilegedClose(ib));
} catch (PrivilegedActionException pae) {
Exception e = pae.getException();
if (e instanceof IOException) {
throw (IOException) e;
} else {
throw new RuntimeException(e.getMessage(), e);
}
}
} else {
ib.close();
}
}
@Override
public boolean isFinished() {
return ib.isFinished();
}
@Override
public boolean isReady() {
if (ib == null) {
throw new IllegalStateException(sm.getString("coyoteInputStream.null"));
}
return ib.isReady();
}
@Override
public void setReadListener(ReadListener listener) {
ib.setReadListener(listener);
}
private void checkNonBlockingRead() {
if (!ib.isBlocking() && !ib.isReady()) {
throw new IllegalStateException(sm.getString("coyoteInputStream.nbNotready"));
}
}
private static class PrivilegedAvailable implements PrivilegedExceptionAction {
private final InputBuffer inputBuffer;
public PrivilegedAvailable(InputBuffer inputBuffer) {
this.inputBuffer = inputBuffer;
}
@Override
public Integer run() throws IOException {
return Integer.valueOf(inputBuffer.available());
}
}
private static class PrivilegedClose implements PrivilegedExceptionAction {
private final InputBuffer inputBuffer;
public PrivilegedClose(InputBuffer inputBuffer) {
this.inputBuffer = inputBuffer;
}
@Override
public Void run() throws IOException {
inputBuffer.close();
return null;
}
}
private static class PrivilegedRead implements PrivilegedExceptionAction {
private final InputBuffer inputBuffer;
public PrivilegedRead(InputBuffer inputBuffer) {
this.inputBuffer = inputBuffer;
}
@Override
public Integer run() throws IOException {
Integer integer = Integer.valueOf(inputBuffer.readByte());
return integer;
}
}
private static class PrivilegedReadArray implements PrivilegedExceptionAction {
private final InputBuffer inputBuffer;
private final byte[] buf;
private final int off;
private final int len;
public PrivilegedReadArray(InputBuffer inputBuffer, byte[] buf, int off, int len) {
this.inputBuffer = inputBuffer;
this.buf = buf;
this.off = off;
this.len = len;
}
@Override
public Integer run() throws IOException {
Integer integer = Integer.valueOf(inputBuffer.read(buf, off, len));
return integer;
}
}
private static class PrivilegedReadBuffer implements PrivilegedExceptionAction {
private final InputBuffer inputBuffer;
private final ByteBuffer bb;
public PrivilegedReadBuffer(InputBuffer inputBuffer, ByteBuffer bb) {
this.inputBuffer = inputBuffer;
this.bb = bb;
}
@Override
public Integer run() throws IOException {
Integer integer = Integer.valueOf(inputBuffer.read(bb));
return integer;
}
}
}
