/*
* JBoss, Home of Professional Open Source.
* Copyright 2017, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.wildfly.extension.undertow.filters;
import io.undertow.Handlers;
import io.undertow.predicate.Predicate;
import io.undertow.server.HttpHandler;
import io.undertow.server.handlers.builder.PredicatedHandler;
import io.undertow.server.handlers.builder.PredicatedHandlersParser;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.SimpleAttributeDefinitionBuilder;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.jboss.modules.Module;
import org.jboss.modules.ModuleIdentifier;
import org.jboss.modules.ModuleLoadException;
import org.jboss.modules.ModuleLoader;
import org.wildfly.extension.undertow.logging.UndertowLogger;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
/**
* @author Tomaz Cerar (c) 2014 Red Hat Inc.
*/
public class ExpressionFilterDefinition extends Filter {
public static final AttributeDefinition EXPRESSION = new SimpleAttributeDefinitionBuilder("expression", ModelType.STRING)
.setRequired(true)
.setAllowExpression(true)
.setRestartAllServices()
.build();
public static final AttributeDefinition MODULE = new SimpleAttributeDefinitionBuilder("module", ModelType.STRING)
.setRequired(false)
.setAllowExpression(true)
.setRestartAllServices()
.build();
public static final ExpressionFilterDefinition INSTANCE = new ExpressionFilterDefinition();
private ExpressionFilterDefinition() {
super("expression-filter");
}
@Override
public Collection<AttributeDefinition> getAttributes() {
return Arrays.asList(EXPRESSION, MODULE);
}
@Override
public HttpHandler createHttpHandler(Predicate predicate, ModelNode model, HttpHandler next) {
String expression = model.get(EXPRESSION.getName()).asString();
String moduleName = null;
if (model.hasDefined(MODULE.getName())) {
moduleName = model.get(MODULE.getName()).asString();
}
ClassLoader classLoader;
if (moduleName == null) {
classLoader = getClass().getClassLoader();
} else {
try {
ModuleLoader moduleLoader = Module.getBootModuleLoader();
Module filterModule = moduleLoader.loadModule(ModuleIdentifier.fromString(moduleName));
classLoader = filterModule.getClassLoader();
} catch (ModuleLoadException e) {
throw UndertowLogger.ROOT_LOGGER.couldNotLoadHandlerFromModule(expression, moduleName, e);
}
}
List<PredicatedHandler> handlers = PredicatedHandlersParser.parse(expression, classLoader);
UndertowLogger.ROOT_LOGGER.debugf("Creating http handler %s from module %s", expression, moduleName);
if (predicate != null) {
return Handlers.predicate(predicate, Handlers.predicates(handlers, next), next);
} else {
return Handlers.predicates(handlers, next);
}
}
@Override
protected Class[] getConstructorSignature() {
throw new IllegalStateException(); //should not be used, as the handler is constructed above
}
}