io.undertow.server.handlers.error.SimpleErrorPageHandler Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 io.undertow.server.handlers.error;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import io.undertow.Handlers;
import io.undertow.io.Sender;
import io.undertow.server.DefaultResponseListener;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.ResponseCodeHandler;
import io.undertow.util.Headers;
import io.undertow.util.StatusCodes;
/**
* Handler that generates an extremely simple no frills error page
*
* @author Stuart Douglas
*/
public class SimpleErrorPageHandler implements HttpHandler {
private volatile HttpHandler next = ResponseCodeHandler.HANDLE_404;
/**
* The response codes that this handler will handle. If this is null then it will handle all 4xx and 5xx codes.
*/
private volatile Set responseCodes = null;
public SimpleErrorPageHandler(final HttpHandler next) {
this.next = next;
}
public SimpleErrorPageHandler() {
}
private final DefaultResponseListener responseListener = new DefaultResponseListener() {
@Override
public boolean handleDefaultResponse(final HttpServerExchange exchange) {
if (!exchange.isResponseChannelAvailable()) {
return false;
}
Set codes = responseCodes;
if (codes == null ? exchange.getStatusCode() >= StatusCodes.BAD_REQUEST : codes.contains(Integer.valueOf(exchange.getStatusCode()))) {
final String errorPage = "Error " + exchange.getStatusCode() + " - " + StatusCodes.getReason(exchange.getStatusCode()) + "";
exchange.getResponseHeaders().put(Headers.CONTENT_LENGTH, "" + errorPage.length());
exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "text/html");
Sender sender = exchange.getResponseSender();
sender.send(errorPage);
return true;
}
return false;
}
};
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
exchange.addDefaultResponseListener(responseListener);
next.handleRequest(exchange);
}
public HttpHandler getNext() {
return next;
}
public SimpleErrorPageHandler setNext(final HttpHandler next) {
Handlers.handlerNotNull(next);
this.next = next;
return this;
}
public Set getResponseCodes() {
return Collections.unmodifiableSet(responseCodes);
}
public SimpleErrorPageHandler setResponseCodes(final Set responseCodes) {
this.responseCodes = new HashSet<>(responseCodes);
return this;
}
public SimpleErrorPageHandler setResponseCodes(final Integer... responseCodes) {
this.responseCodes = new HashSet<>(Arrays.asList(responseCodes));
return this;
}
}