/*
* Copyright 2014 Jeanfrancois Arcand
*
* 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 org.atmosphere.sockjs;
import org.atmosphere.cpr.AtmosphereResourceEvent;
import org.atmosphere.cpr.AtmosphereResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
public class StreamingTransport extends TransportBasedListener {
private static final Logger logger = LoggerFactory.getLogger(StreamingTransport.class);
private static final byte[] padding;
private static final String paddingText;
static {
StringBuilder whitespace = new StringBuilder();
for (int i = 0; i < 2048; i++) {
whitespace.append("h");
}
whitespace.append("\n");
paddingText = whitespace.toString();
padding = paddingText.getBytes();
}
@Override
public void onPreSuspend(AtmosphereResourceEvent event) {
AtmosphereResponse response = event.getResource().getResponse();
response.setContentType("application/javascript");
try {
response.write(padding, true).flushBuffer();
response.write("o\n".getBytes(), true).flushBuffer();
} catch (IOException e) {
logger.trace("", e);
}
}
}