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package org.atmosphere.samples.flickr;
import org.atmosphere.cpr.AtmosphereHandler;
import org.atmosphere.cpr.AtmosphereResource;
import org.atmosphere.cpr.AtmosphereResourceEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* Simple Flickr Magnet Demo.
*
* @author Jeanfrancois Arcand
*/
public class FlickrAtmosphereHandler implements AtmosphereHandler<HttpServletRequest,HttpServletResponse> {
private static final Logger logger = LoggerFactory.getLogger(FlickrAtmosphereHandler.class);
private int counter;
public void onRequest(AtmosphereResource<HttpServletRequest,
HttpServletResponse> event) throws IOException {
HttpServletRequest req = event.getRequest();
HttpServletResponse res = event.getResponse();
logger.info("onEvent: {}", req.getRequestURI());
String[] actionValues = req.getParameterValues("action");
if (actionValues != null && actionValues[0] != null) {
String action = req.getParameterValues("action")[0];
if ("post".equals(action)) {
String message = req.getParameterValues("message")[0];
String callback = req.getParameterValues("callback")[0];
if (callback == null) {
callback = "alert";
}
event.getBroadcaster().broadcast("<script id='comet_" + counter++ + "'>"
+ "window.parent."
+ callback + "(" + message + ");</script>");
res.getWriter().write("ok");
res.getWriter().flush();
} else if ("start".equals(action)) {
res.setContentType("text/html;charset=ISO-8859-1");
res.addHeader("Cache-Control", "private");
res.addHeader("Pragma", "no-cache");
String callback = req.getParameterValues("callback")[0];
if (callback == null) {
callback = "alert";
}
event.suspend();
String message = "{ message : 'Welcome'}";
res.getWriter().write("<script id='comet_" + counter++ + "'>"
+ "window.parent."
+ callback + "(" + message + ");</script>");
res.getWriter().write("<html><head><title>Atmosphere Flickr " +
"Demo</title></head><body bgcolor=\"#FFFFFF\">");
res.getWriter().flush();
}
}
}
public void onStateChange(AtmosphereResourceEvent<HttpServletRequest,
HttpServletResponse> event) throws IOException {
HttpServletResponse res = event.getResource().getResponse();
if (event.isResuming()) {
res.getWriter().write("Atmosphere Sample closed<br/>");
res.getWriter().write("</body></html>");
} else {
res.getWriter().write(event.getMessage().toString());
}
res.getWriter().flush();
}
public void destroy() {
}
}