ErrorPages.java
/*
* 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 org.esigate.extension;
import java.util.Properties;
import org.apache.http.HttpStatus;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.esigate.Driver;
import org.esigate.events.Event;
import org.esigate.events.EventDefinition;
import org.esigate.events.EventManager;
import org.esigate.events.IEventListener;
import org.esigate.events.impl.FragmentEvent;
import org.esigate.test.http.HttpResponseBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This extension handles internal error pages served directly by esigate.
* <p>
* Supported pages :
* <ul>
* <li>http://esigate/no-mapping/</li>
* </ul>
*
* @author Nicolas Richeton
*
*/
public class ErrorPages implements Extension, IEventListener {
private static final StringEntity NO_MAPPING = new StringEntity(
"<html><body><h1>Esigate cannot process this request.</h1>"
+ "<h2>No mapping defined for this url.</h2></body></html>", ContentType.create("text/html",
"utf-8"));
private static final Logger LOG = LoggerFactory.getLogger(ErrorPages.class);
@Override
public void init(Driver driver, Properties properties) {
driver.getEventManager().register(EventManager.EVENT_FRAGMENT_PRE, this);
}
@Override
public boolean event(EventDefinition id, Event event) {
FragmentEvent e = (FragmentEvent) event;
if (EventManager.EVENT_FRAGMENT_PRE.equals(id)) {
LOG.error(e.getHttpRequest().getRequestLine().getUri());
if ("esigate".equals(e.getHttpContext().getTargetHost().getHostName())) {
if ("http://esigate/no-mapping/".equals(e.getHttpRequest().getRequestLine().getUri())) {
e.setHttpResponse(new HttpResponseBuilder().status(HttpStatus.SC_NOT_FOUND)
.reason("No mapping defined").entity(NO_MAPPING).build());
return false;
}
}
}
// Continue processing
return true;
}
}