org.apache.wicket.http2.markup.head.Tomcat85PushBuilder Maven / Gradle / Ivy
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Wicket’s implementation to use the PushBuilder API
to serve resource via http/2 with less requests. This
is the Apache Tomcat 8.5+ implementation to resolve the PushBuilder API and
provide the IInitializer.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.wicket.http2.markup.head;
import javax.servlet.http.HttpServletRequest;
import org.apache.catalina.core.ApplicationPushBuilder;
import org.apache.wicket.http2.markup.head.PushItemHeaderValue.HeaderOperation;
import org.apache.wicket.request.Request;
import org.apache.wicket.request.cycle.RequestCycle;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Allows to push resources with the Tomcat 8.5+ specific push builder API
*/
public class Tomcat85PushBuilder implements PushBuilder
{
private static final Logger LOG = LoggerFactory.getLogger(Tomcat85PushBuilder.class);
@Override
public void push(HttpServletRequest httpServletRequest, PushItem... pushItems)
{
Request request = RequestCycle.get().getRequest();
HttpServletRequest httpRequest = (HttpServletRequest) request.getContainerRequest();
org.apache.catalina.connector.RequestFacade tomcatRequest = (org.apache.catalina.connector.RequestFacade) httpRequest;
ApplicationPushBuilder pushBuilder = (ApplicationPushBuilder) tomcatRequest.newPushBuilder();
if (pushBuilder != null)
{
for (PushItem pushItem : pushItems)
{
pushBuilder.path(pushItem.getUrl());
pushItem.getHeaders().entrySet().stream().forEach(pushHeader -> {
String key = pushHeader.getKey();
PushItemHeaderValue value = pushHeader.getValue();
if(value.getOperation() == HeaderOperation.ADD){
pushBuilder.addHeader(key, value.getValue());
}else{
pushBuilder.setHeader(key, value.getValue());
}
});
pushBuilder.push();
}
}
else
{
LOG.warn("Attempted to use HTTP2 Push but it is not supported for the current request: {}!",
httpRequest);
}
}
}
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