/*
* Copyright 2000-2016 Vaadin Ltd.
*
* 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 com.vaadin.server;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
/**
* Wrapper for {@link HttpServletResponse}.
*
* @author Vaadin Ltd.
* @since 7.0
*
* @see VaadinResponse
* @see VaadinServletRequest
*/
public class VaadinServletResponse extends HttpServletResponseWrapper
implements VaadinResponse {
private final VaadinServletService vaadinService;
/**
* Wraps a http servlet response and an associated vaadin service
*
* @param response
* the http servlet response to wrap
* @param vaadinService
* the associated vaadin service
*/
public VaadinServletResponse(HttpServletResponse response,
VaadinServletService vaadinService) {
super(response);
this.vaadinService = vaadinService;
}
/**
* Gets the original unwrapped <code>HttpServletResponse</code>
*
* @return the unwrapped response
*/
public HttpServletResponse getHttpServletResponse() {
return this;
}
@Override
public void setCacheTime(long milliseconds) {
doSetCacheTime(this, milliseconds);
}
// Implementation shared with VaadinPortletResponse
static void doSetCacheTime(VaadinResponse response, long milliseconds) {
if (milliseconds <= 0) {
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);
} else {
response.setHeader("Cache-Control",
"max-age=" + milliseconds / 1000);
response.setDateHeader("Expires",
System.currentTimeMillis() + milliseconds);
// Required to apply caching in some Tomcats
response.setHeader("Pragma", "cache");
}
}
@Override
public VaadinServletService getService() {
return vaadinService;
}
}