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package org.apache.catalina.connector;
import java.io.IOException;
import java.io.Reader;
import java.nio.channels.InterruptedByTimeoutException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ResourceBundle;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ReadListener;
import javax.servlet.http.WebConnection;
import org.apache.catalina.ContainerEvent;
import org.apache.catalina.Context;
import org.apache.catalina.Globals;
import org.apache.catalina.core.StandardServer;
import org.glassfish.grizzly.ReadHandler;
import org.glassfish.grizzly.http.server.Request;
import org.glassfish.grizzly.http.util.ByteChunk.ByteInputChannel;
import org.glassfish.grizzly.http.util.CharChunk;
import org.glassfish.logging.annotation.LogMessageInfo;
/**
* The buffer used by Tomcat request. This is a derivative of the Tomcat 3.3
* OutputBuffer, adapted to handle input instead of output. This allows
* complete recycling of the facade objects (the ServletInputStream and the
* BufferedReader).
*
* @author Remy Maucherat
*/
public class InputBuffer extends Reader
implements ByteInputChannel, CharChunk.CharInputChannel,
CharChunk.CharOutputChannel {
private static final Logger log = StandardServer.log;
private static final ResourceBundle rb = log.getResourceBundle();
@LogMessageInfo(
message = "Stream closed",
level = "WARNING"
)
public static final String STREAM_CLOSED = "AS-WEB-CORE-00045";
@LogMessageInfo(
message = "Already set read listener",
level = "WARNING"
)
public static final String ALREADY_SET_READ_LISTENER = "AS-WEB-CORE-00046";
@LogMessageInfo(
message = "Cannot set ReaderListener for non-async or non-upgrade request",
level = "WARNING"
)
public static final String NON_ASYNC_UPGRADE_EXCEPTION = "AS-WEB-CORE-00047";
@LogMessageInfo(
message = "Error in invoking ReadListener.onDataAvailable",
level = "WARNING"
)
public static final String READ_LISTENER_ON_DATA_AVAILABLE_ERROR = "AS-WEB-CORE-00048";
// -------------------------------------------------------------- Constants
public static final int DEFAULT_BUFFER_SIZE = 8*1024;
// ----------------------------------------------------- Instance Variables
/**
* Associated Grizzly request.
*/
private Request grizzlyRequest;
private org.glassfish.grizzly.http.io.InputBuffer grizzlyInputBuffer;
private org.apache.catalina.connector.Request request;
private ReadHandler readHandler = null;
private boolean prevIsReady = true;
private static final ThreadLocal<Boolean> IS_READY_SCOPE = new ThreadLocal<Boolean>();
// ----------------------------------------------------------- Constructors
/**
* Default constructor. Allocate the buffer with the default buffer size.
*/
public InputBuffer() {
this(DEFAULT_BUFFER_SIZE);
}
/**
* Alternate constructor which allows specifying the initial buffer size.
*
* @param size Buffer size to use
*/
public InputBuffer(int size) {
// this.size = size;
// bb = new ByteChunk(size);
// bb.setLimit(size);
// bb.setByteInputChannel(this);
}
// ------------------------------------------------------------- Properties
/**
* Associated Grizzly request.
*
* @param grizzlyRequest Associated Grizzly request
*/
public void setRequest(Request grizzlyRequest) {
this.grizzlyRequest = grizzlyRequest;
this.grizzlyInputBuffer = grizzlyRequest.getInputBuffer();
}
public void setRequest(org.apache.catalina.connector.Request request) {
this.request = request;
}
/**
* Get associated Grizzly request.
*
* @return the associated Grizzly request
*/
public Request getRequest() {
return this.grizzlyRequest;
}
// --------------------------------------------------------- Public Methods
/**
* Recycle the output buffer.
*/
public void recycle() {
if (log.isLoggable(Level.FINEST))
log.log(Level.FINEST, "recycle()");
grizzlyInputBuffer = null;
grizzlyRequest = null;
readHandler = null;
prevIsReady = true;
}
/**
* Close the input buffer.
*
* @throws IOException An underlying IOException occurred
*/
public void close()
throws IOException {
grizzlyInputBuffer.close();
}
public int available()
throws IOException {
return grizzlyInputBuffer.readyData();
}
// ------------------------------------------------- Bytes Handling Methods
/**
* Reads new bytes in the byte chunk.
*
* @param cbuf Byte buffer to be written to the response
* @param off Offset
* @param len Length
*
* @throws IOException An underlying IOException occurred
*/
public int realReadBytes(byte cbuf[], int off, int len)
throws IOException {
return grizzlyInputBuffer.read(cbuf, off, len);
}
public int readByte()
throws IOException {
if (grizzlyInputBuffer.isClosed())
throw new IOException(rb.getString(STREAM_CLOSED));
return grizzlyInputBuffer.readByte();
}
public int read(final byte[] b, final int off, final int len)
throws IOException {
if (grizzlyInputBuffer.isClosed())
throw new IOException(rb.getString(STREAM_CLOSED));
return grizzlyInputBuffer.read(b, off, len);
}
public boolean isFinished() {
return grizzlyInputBuffer.isFinished();
}
public boolean isReady() {
if (!prevIsReady) {
return false;
}
boolean result = (grizzlyInputBuffer.available() > 0);
if (!result) {
if (readHandler != null) {
prevIsReady = false; // Not data available
IS_READY_SCOPE.set(Boolean.TRUE);
try {
grizzlyInputBuffer.notifyAvailable(readHandler);
} finally {
IS_READY_SCOPE.remove();
}
} else {
prevIsReady = true; // Allow next .isReady() call to check underlying inputStream
}
}
return result;
}
public void setReadListener(ReadListener readListener) {
if (readHandler != null) {
throw new IllegalStateException(rb.getString(ALREADY_SET_READ_LISTENER));
}
if (!(request.isAsyncStarted() || request.isUpgrade())) {
throw new IllegalStateException(rb.getString(NON_ASYNC_UPGRADE_EXCEPTION));
}
readHandler = new ReadHandlerImpl(readListener);
if (isReady()) {
try {
readHandler.onDataAvailable();
} catch(Throwable t) {
log.log(Level.WARNING, READ_LISTENER_ON_DATA_AVAILABLE_ERROR, t);
}
}
}
void disableReadHandler() {
if (readHandler != null) {
synchronized(readHandler) {
readHandler.onError(new InterruptedByTimeoutException());
}
}
}
// ------------------------------------------------- Chars Handling Methods
/**
* Since the converter will use append, it is possible to get chars to
* be removed from the buffer for "writing". Since the chars have already
* been read before, they are ignored. If a mark was set, then the
* mark is lost.
*/
public void realWriteChars(char c[], int off, int len)
throws IOException {
// START OF SJSAS 6231069
// initChar();
// END OF SJSAS 6231069
// markPos = -1;
}
public void setEncoding(final String encoding) {
grizzlyInputBuffer.setDefaultEncoding(encoding);
}
public int realReadChars(final char cbuf[], final int off, final int len)
throws IOException {
return grizzlyInputBuffer.read(cbuf, off, len);
}
public int read()
throws IOException {
if (grizzlyInputBuffer.isClosed())
throw new IOException(rb.getString(STREAM_CLOSED));
return grizzlyInputBuffer.readChar();
}
public int read(char[] cbuf)
throws IOException {
return read(cbuf, 0, cbuf.length);
}
public int read(char[] cbuf, int off, int len)
throws IOException {
if (grizzlyInputBuffer.isClosed())
throw new IOException(rb.getString(STREAM_CLOSED));
return grizzlyInputBuffer.read(cbuf, off, len);
}
public long skip(long n)
throws IOException {
if (grizzlyInputBuffer.isClosed())
throw new IOException(rb.getString(STREAM_CLOSED));
if (n < 0) {
throw new IllegalArgumentException();
}
return grizzlyInputBuffer.skip(n, true);
}
public boolean ready()
throws IOException {
if (grizzlyInputBuffer.isClosed())
throw new IOException(rb.getString(STREAM_CLOSED));
return grizzlyInputBuffer.ready();
}
public boolean markSupported() {
return true;
}
public void mark(int readAheadLimit)
throws IOException {
grizzlyInputBuffer.mark(readAheadLimit);
}
public void reset()
throws IOException {
if (grizzlyInputBuffer.isClosed())
throw new IOException(rb.getString(STREAM_CLOSED));
grizzlyInputBuffer.reset();
}
public void checkConverter()
throws IOException {
grizzlyInputBuffer.processingChars();
}
class ReadHandlerImpl implements ReadHandler {
private ReadListener readListener = null;
private volatile boolean disable = false;
private ReadHandlerImpl(ReadListener listener) {
readListener = listener;
}
@Override
public void onDataAvailable() {
if (disable) {
return;
}
if (!Boolean.TRUE.equals(IS_READY_SCOPE.get())) {
processDataAvailable();
} else {
AsyncContextImpl.getExecutorService().execute(new Runnable() {
@Override
public void run() {
processDataAvailable();
}
});
}
}
private void processDataAvailable() {
ClassLoader oldCL;
if (Globals.IS_SECURITY_ENABLED) {
PrivilegedAction<ClassLoader> pa = new PrivilegedGetTccl();
oldCL = AccessController.doPrivileged(pa);
} else {
oldCL = Thread.currentThread().getContextClassLoader();
}
try {
Context context = request.getContext();
ClassLoader newCL = context.getLoader().getClassLoader();
if (Globals.IS_SECURITY_ENABLED) {
PrivilegedAction<Void> pa = new PrivilegedSetTccl(newCL);
AccessController.doPrivileged(pa);
} else {
Thread.currentThread().setContextClassLoader(newCL);
}
synchronized(this) {
prevIsReady = true;
try {
context.fireContainerEvent(
ContainerEvent.BEFORE_READ_LISTENER_ON_DATA_AVAILABLE, readListener);
readListener.onDataAvailable();
} catch(Throwable t) {
disable = true;
readListener.onError(t);
} finally {
context.fireContainerEvent(
ContainerEvent.AFTER_READ_LISTENER_ON_DATA_AVAILABLE, readListener);
}
}
} finally {
if (Globals.IS_SECURITY_ENABLED) {
PrivilegedAction<Void> pa = new PrivilegedSetTccl(oldCL);
AccessController.doPrivileged(pa);
} else {
Thread.currentThread().setContextClassLoader(oldCL);
}
}
}
@Override
public void onAllDataRead() {
if (disable) {
return;
}
if (!Boolean.TRUE.equals(IS_READY_SCOPE.get())) {
processAllDataRead();
} else {
AsyncContextImpl.getExecutorService().execute(new Runnable() {
@Override
public void run() {
processAllDataRead();
}
});
}
}
private void processAllDataRead() {
ClassLoader oldCL;
if (Globals.IS_SECURITY_ENABLED) {
PrivilegedAction<ClassLoader> pa = new PrivilegedGetTccl();
oldCL = AccessController.doPrivileged(pa);
} else {
oldCL = Thread.currentThread().getContextClassLoader();
}
try {
Context context = request.getContext();
ClassLoader newCL = context.getLoader().getClassLoader();
if (Globals.IS_SECURITY_ENABLED) {
PrivilegedAction<Void> pa = new PrivilegedSetTccl(newCL);
AccessController.doPrivileged(pa);
} else {
Thread.currentThread().setContextClassLoader(newCL);
}
synchronized(this) {
prevIsReady = true;
try {
context.fireContainerEvent(
ContainerEvent.BEFORE_READ_LISTENER_ON_ALL_DATA_READ, readListener);
readListener.onAllDataRead();
} catch(Throwable t) {
disable = true;
readListener.onError(t);
} finally {
context.fireContainerEvent(
ContainerEvent.AFTER_READ_LISTENER_ON_ALL_DATA_READ, readListener);
}
}
} finally {
if (Globals.IS_SECURITY_ENABLED) {
PrivilegedAction<Void> pa = new PrivilegedSetTccl(oldCL);
AccessController.doPrivileged(pa);
} else {
Thread.currentThread().setContextClassLoader(oldCL);
}
}
}
@Override
public void onError(final Throwable t) {
if (disable) {
return;
}
disable = true;
if (!Boolean.TRUE.equals(IS_READY_SCOPE.get())) {
processError(t);
} else {
AsyncContextImpl.getExecutorService().execute(new Runnable() {
@Override
public void run() {
processError(t);
}
});
}
}
private void processError(final Throwable t) {
ClassLoader oldCL;
if (Globals.IS_SECURITY_ENABLED) {
PrivilegedAction<ClassLoader> pa = new PrivilegedGetTccl();
oldCL = AccessController.doPrivileged(pa);
} else {
oldCL = Thread.currentThread().getContextClassLoader();
}
try {
Context context = request.getContext();
ClassLoader newCL = context.getLoader().getClassLoader();
if (Globals.IS_SECURITY_ENABLED) {
PrivilegedAction<Void> pa = new PrivilegedSetTccl(newCL);
AccessController.doPrivileged(pa);
} else {
Thread.currentThread().setContextClassLoader(newCL);
}
synchronized(this) {
// Get isUpgrade and WebConnection before calling onError
// Just in case onError will complete the async processing.
final boolean isUpgrade = request.isUpgrade();
final WebConnection wc = request.getWebConnection();
try {
context.fireContainerEvent(
ContainerEvent.BEFORE_READ_LISTENER_ON_ERROR, readListener);
readListener.onError(t);
} finally {
if (isUpgrade && wc != null) {
try {
wc.close();
} catch (Exception ignored) {
}
}
context.fireContainerEvent(
ContainerEvent.AFTER_READ_LISTENER_ON_ERROR, readListener);
}
}
} finally {
if (Globals.IS_SECURITY_ENABLED) {
PrivilegedAction<Void> pa = new PrivilegedSetTccl(oldCL);
AccessController.doPrivileged(pa);
} else {
Thread.currentThread().setContextClassLoader(oldCL);
}
}
}
}
private static class PrivilegedSetTccl implements PrivilegedAction<Void> {
private ClassLoader cl;
PrivilegedSetTccl(ClassLoader cl) {
this.cl = cl;
}
@Override
public Void run() {
Thread.currentThread().setContextClassLoader(cl);
return null;
}
}
private static class PrivilegedGetTccl
implements PrivilegedAction<ClassLoader> {
@Override
public ClassLoader run() {
return Thread.currentThread().getContextClassLoader();
}
}
}