/*
 * 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.
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package io.undertow.servlet.predicate;

import io.undertow.attribute.ExchangeAttribute;
import io.undertow.attribute.ExchangeAttributes;
import io.undertow.predicate.Predicate;
import io.undertow.predicate.PredicateBuilder;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.resource.Resource;
import io.undertow.server.handlers.resource.ResourceManager;
import io.undertow.servlet.handlers.ServletRequestContext;

import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

Predicate that returns true if the given location corresponds to a directory.
Author:Stuart Douglas
/** * Predicate that returns true if the given location corresponds to a directory. * * @author Stuart Douglas */
public class DirectoryPredicate implements Predicate { private final ExchangeAttribute location; public DirectoryPredicate(final ExchangeAttribute location) { this.location = location; } @Override public boolean resolve(final HttpServerExchange value) { String location = this.location.readAttribute(value); ServletRequestContext src = value.getAttachment(ServletRequestContext.ATTACHMENT_KEY); if(src == null) { return false; } ResourceManager manager = src.getDeployment().getDeploymentInfo().getResourceManager(); if(manager == null) { return false; } try { Resource resource = manager.getResource(location); if(resource == null) { return false; } return resource.isDirectory(); } catch (IOException e) { throw new RuntimeException(e); } } @Override public String toString() { return "directory( " + location.toString() + " )"; } public static class Builder implements PredicateBuilder { @Override public String name() { return "directory"; } @Override public Map<String, Class<?>> parameters() { final Map<String, Class<?>> params = new HashMap<>(); params.put("value", ExchangeAttribute.class); return params; } @Override public Set<String> requiredParameters() { return Collections.emptySet(); } @Override public String defaultParameter() { return "value"; } @Override public Predicate build(final Map<String, Object> config) { ExchangeAttribute value = (ExchangeAttribute) config.get("value"); if(value == null) { value = ExchangeAttributes.relativePath(); } return new DirectoryPredicate(value); } } }