/*
* JBoss, Home of Professional Open Source.
* Copyright 2012 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<Integer> responseCodes = null;
public SimpleErrorPageHandler(final HttpHandler next) {
this.next = next;
}
public SimpleErrorPageHandler() {
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
exchange.addDefaultResponseListener(new DefaultResponseListener() {
@Override
public boolean handleDefaultResponse(final HttpServerExchange exchange) {
if (!exchange.isResponseChannelAvailable()) {
return false;
}
Set<Integer> codes = responseCodes;
if (codes == null ? exchange.getResponseCode() >= 400 : codes.contains(Integer.valueOf(exchange.getResponseCode()))) {
final String errorPage = "<html><head><title>Error</title></head><body>" + exchange.getResponseCode() + " - " + StatusCodes.getReason(exchange.getResponseCode()) + "</body></html>";
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;
}
});
next.handleRequest(exchange);
}
public HttpHandler getNext() {
return next;
}
public SimpleErrorPageHandler setNext(final HttpHandler next) {
Handlers.handlerNotNull(next);
this.next = next;
return this;
}
public Set<Integer> getResponseCodes() {
return Collections.unmodifiableSet(responseCodes);
}
public SimpleErrorPageHandler setResponseCodes(final Set<Integer> responseCodes) {
this.responseCodes = new HashSet<Integer>(responseCodes);
return this;
}
public SimpleErrorPageHandler setResponseCodes(final Integer... responseCodes) {
this.responseCodes = new HashSet<Integer>(Arrays.asList(responseCodes));
return this;
}
}