io.undertow.server.handlers.HttpContinueAcceptingHandler Maven / Gradle / Ivy
/*
* 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;
import java.io.IOException;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
import io.undertow.UndertowLogger;
import io.undertow.io.IoCallback;
import io.undertow.io.Sender;
import io.undertow.predicate.Predicate;
import io.undertow.predicate.Predicates;
import io.undertow.server.HandlerWrapper;
import io.undertow.server.handlers.builder.HandlerBuilder;
import io.undertow.server.protocol.http.HttpContinue;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
/**
* Handler that provides support for HTTP/1.1 continue responses.
*
* If the provided predicate returns true then the request will be
* accepted, otherwise it will be rejected.
*
* If no predicate is supplied then all requests will be accepted.
*
* @see io.undertow.server.protocol.http.HttpContinue
* @author Stuart Douglas
*/
public class HttpContinueAcceptingHandler implements HttpHandler {
private final HttpHandler next;
private final Predicate accept;
public HttpContinueAcceptingHandler(HttpHandler next, Predicate accept) {
this.next = next;
this.accept = accept;
}
public HttpContinueAcceptingHandler(HttpHandler next) {
this(next, Predicates.truePredicate());
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
if(HttpContinue.requiresContinueResponse(exchange)) {
if(accept.resolve(exchange)) {
HttpContinue.sendContinueResponse(exchange, new IoCallback() {
@Override
public void onComplete(final HttpServerExchange exchange, final Sender sender) {
exchange.dispatch(next);
}
@Override
public void onException(final HttpServerExchange exchange, final Sender sender, final IOException exception) {
UndertowLogger.REQUEST_IO_LOGGER.ioException(exception);
exchange.endExchange();
}
});
} else {
HttpContinue.rejectExchange(exchange);
}
} else {
next.handleRequest(exchange);
}
}
public static final class Wrapper implements HandlerWrapper {
private final Predicate predicate;
public Wrapper(Predicate predicate) {
this.predicate = predicate;
}
@Override
public HttpHandler wrap(HttpHandler handler) {
return new HttpContinueAcceptingHandler(handler, predicate);
}
}
@Override
public String toString() {
return "http-continue-accept()";
}
public static class Builder implements HandlerBuilder {
@Override
public String name() {
return "http-continue-accept";
}
@Override
public Map> parameters() {
return Collections.emptyMap();
}
@Override
public Set requiredParameters() {
return null;
}
@Override
public String defaultParameter() {
return null;
}
@Override
public HandlerWrapper build(Map config) {
return new Wrapper(Predicates.truePredicate());
}
}
}