/*
* JBoss, Home of Professional Open Source.
* Copyright 2017, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.wildfly.extension.undertow.deployment;
import java.util.List;
import org.wildfly.extension.requestcontroller.ControlPoint;
import org.wildfly.extension.requestcontroller.RunResult;
import io.undertow.predicate.Predicate;
import io.undertow.server.ExchangeCompletionListener;
import io.undertow.server.HandlerWrapper;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.servlet.handlers.ServletRequestContext;
/**
* Undertow handler that hooks into the global request controller.
*
* @author Stuart Douglas
*/
public class GlobalRequestControllerHandler implements HttpHandler {
public static final String ORG_WILDFLY_SUSPENDED = "org.wildfly.suspended";
private final HttpHandler next;
private final ControlPoint entryPoint;
private final List<Predicate> allowSuspendedRequests;
private final ExchangeCompletionListener listener = new ExchangeCompletionListener() {
@Override
public void exchangeEvent(HttpServerExchange exchange, NextListener nextListener) {
entryPoint.requestComplete();
nextListener.proceed();
}
};
public GlobalRequestControllerHandler(HttpHandler next, ControlPoint entryPoint, List<Predicate> allowSuspendedRequests) {
this.next = next;
this.entryPoint = entryPoint;
this.allowSuspendedRequests = allowSuspendedRequests;
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
RunResult result = entryPoint.beginRequest();
try {
if(result == RunResult.RUN) {
next.handleRequest(exchange);
} else {
boolean allowed = false;
for(Predicate allow : allowSuspendedRequests) {
if(allow.resolve(exchange)) {
allowed = true;
ServletRequestContext src = exchange.getAttachment(ServletRequestContext.ATTACHMENT_KEY);
if(src != null) {
src.getServletRequest().setAttribute(ORG_WILDFLY_SUSPENDED, "true");
}
next.handleRequest(exchange);
break;
}
}
if (!allowed) {
exchange.setStatusCode(503);
exchange.endExchange();
}
}
} finally {
if(result == RunResult.RUN && (exchange.isComplete() || !exchange.isDispatched())) {
entryPoint.requestComplete();
} else if(result == RunResult.RUN) {
exchange.addExchangeCompleteListener(listener);
}
}
}
public static HandlerWrapper wrapper(final ControlPoint entryPoint, List<Predicate> allowSuspendedRequests) {
return handler -> new GlobalRequestControllerHandler(handler, entryPoint, allowSuspendedRequests);
}
public HttpHandler getNext() {
return next;
}
}