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package renderkits.renderkit.xul;
import javax.faces.context.FacesContext;
import javax.faces.event.PhaseEvent;
import javax.faces.event.PhaseId;
import javax.faces.event.PhaseListener;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
/**
* This <code>PhaseListener</code> executes after Invoke Applications
* Phase of the request processing lifecycle. It detects the presence
* of an <code>XMLHttpRequest</code> and:
* <ul><li>grabs the request URI from the request (this will be the
* URI of the new uocoming view) and adds it to the response;</li>
* </ul>
*/
public class ResponsePhaseListener implements PhaseListener {
private static final String XML_HTTP = "XML-HTTP";
private static final String VIEW_URI = "VIEW-URI";
public ResponsePhaseListener() {
}
public void afterPhase(PhaseEvent event) {
// Disregard requests that are not XMLHttpRequest(s)
Map<String, String> requestHeaderMap =
event.getFacesContext().getExternalContext().
getRequestHeaderMap();
if (requestHeaderMap.get(XML_HTTP) == null) {
return;
}
// If we're dealing with an XMLHttpRequest...
// Get the URI and stuff it in the response header.
FacesContext context = event.getFacesContext();
String viewId = context.getViewRoot().getViewId();
String actionURL = context.getApplication().getViewHandler()
.getActionURL(context, viewId);
HttpServletResponse response =
(HttpServletResponse) context.getExternalContext().getResponse();
response.setHeader("Cache-Control", "no-cache");
response.setHeader(VIEW_URI, actionURL);
}
public void beforePhase(PhaseEvent event) {
}
public PhaseId getPhaseId() {
return PhaseId.INVOKE_APPLICATION;
}
}