ProtectedServlet.java

/*
 * Copyright 2014 Red Hat Inc. and/or its affiliates and other contributors
 * as indicated by the @author tags. All rights reserved.
 *
 * 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.example.multitenant.boundary;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.keycloak.KeycloakPrincipal;

/**
 *
 * @author Juraci Paixão Kröhling <juraci at kroehling.de>
 */
@WebServlet(urlPatterns = "/*")
public class ProtectedServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String realm = req.getPathInfo().split("/")[1];
        if (realm.contains("?")) {
            realm = realm.split("\\?")[0];
        }

        if (req.getPathInfo().contains("logout")) {
            req.logout();
            resp.sendRedirect(req.getContextPath() + "/" + realm);
            return;
        }

        KeycloakPrincipal principal = (KeycloakPrincipal) req.getUserPrincipal();

        resp.setContentType("text/html");
        PrintWriter writer = resp.getWriter();

        writer.write("Realm: ");
        writer.write(principal.getKeycloakSecurityContext().getIdToken().getIssuer());

        writer.write("<br/>User: ");
        writer.write(principal.getKeycloakSecurityContext().getIdToken().getPreferredUsername());

        writer.write(String.format("<br/><a href=\"/multitenant/%s/logout\">Logout</a>", realm));
    }
 }