io.undertow.server.handlers.AllowedMethodsHandler 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;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import io.undertow.server.HandlerWrapper;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.builder.HandlerBuilder;
import io.undertow.util.HttpString;
import io.undertow.util.StatusCodes;
import java.util.stream.Collectors;
/**
* Handler that whitelists certain HTTP methods. Only requests with a method in
* the allowed methods set will be allowed to continue.
*
* @author Stuart Douglas
*/
public class AllowedMethodsHandler implements HttpHandler {
private final Set allowedMethods;
private final HttpHandler next;
public AllowedMethodsHandler(final HttpHandler next, final Set allowedMethods) {
this.allowedMethods = new HashSet<>(allowedMethods);
this.next = next;
}
public AllowedMethodsHandler(final HttpHandler next, final HttpString... allowedMethods) {
this.allowedMethods = new HashSet<>(Arrays.asList(allowedMethods));
this.next = next;
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
if (allowedMethods.contains(exchange.getRequestMethod())) {
next.handleRequest(exchange);
} else {
exchange.setStatusCode(StatusCodes.METHOD_NOT_ALLOWED);
exchange.endExchange();
}
}
public Set getAllowedMethods() {
return Collections.unmodifiableSet(allowedMethods);
}
@Override
public String toString() {
if (allowedMethods.size() == 1) {
return "allowed-methods( " + allowedMethods.toArray()[0] + " )";
} else {
return "allowed-methods( {" + allowedMethods.stream().map(s -> s.toString()).collect(Collectors.joining(", ")) + "} )";
}
}
public static class Builder implements HandlerBuilder {
@Override
public String name() {
return "allowed-methods";
}
@Override
public Map> parameters() {
return Collections.>singletonMap("methods", String[].class);
}
@Override
public Set requiredParameters() {
return Collections.singleton("methods");
}
@Override
public String defaultParameter() {
return "methods";
}
@Override
public HandlerWrapper build(Map config) {
return new Wrapper((String[]) config.get("methods"));
}
}
private static class Wrapper implements HandlerWrapper {
private final String[] methods;
private Wrapper(String[] methods) {
this.methods = methods;
}
@Override
public HttpHandler wrap(HttpHandler handler) {
HttpString[] strings = new HttpString[methods.length];
for (int i = 0; i < methods.length; ++i) {
strings[i] = new HttpString(methods[i]);
}
return new AllowedMethodsHandler(handler, strings);
}
}
}