/*
* JBoss, Home of Professional Open Source.
* Copyright 2016 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 org.keycloak.adapters.elytron;
import org.keycloak.adapters.AdapterDeploymentContext;
import org.keycloak.adapters.KeycloakConfigResolver;
import org.keycloak.adapters.KeycloakDeployment;
import org.keycloak.adapters.KeycloakDeploymentBuilder;
import org.keycloak.constants.AdapterConstants;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
/**
* <p>A {@link ServletContextListener} that parses the keycloak adapter configuration and set the same configuration
* as a {@link ServletContext} attribute in order to provide to {@link KeycloakHttpServerAuthenticationMechanism} a way
* to obtain the configuration when processing requests.
*
* <p>This listener should be automatically registered to a deployment using the subsystem.
*
* @author <a href="mailto:psilva@redhat.com">Pedro Igor</a>
*/
public class KeycloakConfigurationServletListener implements ServletContextListener {
@Override
public void contextInitialized(ServletContextEvent sce) {
ServletContext servletContext = sce.getServletContext();
String configResolverClass = servletContext.getInitParameter("keycloak.config.resolver");
KeycloakConfigResolver configResolver;
AdapterDeploymentContext deploymentContext;
if (configResolverClass != null) {
try {
configResolver = (KeycloakConfigResolver) servletContext.getClassLoader().loadClass(configResolverClass).newInstance();
deploymentContext = new AdapterDeploymentContext(configResolver);
} catch (Exception ex) {
deploymentContext = new AdapterDeploymentContext(new KeycloakDeployment());
}
} else {
InputStream is = getConfigInputStream(servletContext);
KeycloakDeployment deployment;
if (is == null) {
deployment = new KeycloakDeployment();
} else {
deployment = KeycloakDeploymentBuilder.build(is);
}
deploymentContext = new AdapterDeploymentContext(deployment);
}
servletContext.setAttribute(AdapterDeploymentContext.class.getName(), deploymentContext);
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
}
private InputStream getConfigInputStream(ServletContext servletContext) {
InputStream is = getJSONFromServletContext(servletContext);
if (is == null) {
String path = servletContext.getInitParameter("keycloak.config.file");
if (path == null) {
is = servletContext.getResourceAsStream("/WEB-INF/keycloak.json");
} else {
try {
is = new FileInputStream(path);
} catch (FileNotFoundException e) {
throw new RuntimeException(e);
}
}
}
return is;
}
private InputStream getJSONFromServletContext(ServletContext servletContext) {
String json = servletContext.getInitParameter(AdapterConstants.AUTH_DATA_PARAM_NAME);
if (json == null) {
return null;
}
return new ByteArrayInputStream(json.getBytes());
}
}