/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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 io.undertow.servlet.test.streams;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.servlet.AsyncContext;
import javax.servlet.ReadListener;
import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
import javax.servlet.ServletOutputStream;
import javax.servlet.WriteListener;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* @author Stuart Douglas
*/
public class AsyncInputStreamServlet extends HttpServlet {
@Override
protected void doPost(final HttpServletRequest req, final HttpServletResponse resp) throws ServletException, IOException {
final AsyncContext context = req.startAsync();
final ServletOutputStream outputStream = resp.getOutputStream();
ServletInputStream inputStream = req.getInputStream();
final MyListener listener = new MyListener(outputStream, inputStream, context);
inputStream.setReadListener(listener);
outputStream.setWriteListener(listener);
}
private class MyListener implements WriteListener, ReadListener {
private final ServletOutputStream outputStream;
private final ServletInputStream inputStream;
private final ByteArrayOutputStream dataToWrite = new ByteArrayOutputStream();
private final AsyncContext context;
boolean done = false;
int written = 0;
MyListener(final ServletOutputStream outputStream, final ServletInputStream inputStream, final AsyncContext context) {
this.outputStream = outputStream;
this.inputStream = inputStream;
this.context = context;
}
@Override
public void onWritePossible() throws IOException {
if (outputStream.isReady()) {
outputStream.write(dataToWrite.toByteArray());
written += dataToWrite.toByteArray().length;
dataToWrite.reset();
if (done) {
context.complete();
}
}
}
@Override
public void onDataAvailable() throws IOException {
int read;
while (inputStream.isReady()) {
read = inputStream.read();
if (read == 0) {
System.out.println("onDataAvailable> read 0x00");
}
if (read != -1) {
dataToWrite.write(read);
} else {
onWritePossible();
}
}
}
@Override
public synchronized void onAllDataRead() throws IOException {
done = true;
onWritePossible();
}
@Override
public synchronized void onError(final Throwable t) {
t.printStackTrace();
}
}
}