content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.apache.camel.component.undertow;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import io.undertow.security.api.AuthenticationMechanism;
  import io.undertow.security.api.AuthenticationMode;
  import io.undertow.security.handlers.AuthenticationCallHandler;
  import io.undertow.security.handlers.AuthenticationConstraintHandler;
  import io.undertow.security.handlers.AuthenticationMechanismsHandler;
  import io.undertow.security.handlers.SecurityInitialHandler;
  import io.undertow.security.idm.IdentityManager;
  import io.undertow.security.impl.BasicAuthenticationMechanism;
  import io.undertow.server.HttpHandler;
  import io.undertow.server.HttpServerExchange;
  
  public class UndertowBasicAuthHandler implements CamelUndertowHttpHandler {
  
      private HttpHandler next;
      private HttpHandler securityHandler;
      private IdentityManager identityManager;
  
      @Override
      public void handleRequest(HttpServerExchange exchange) throws Exception {
          if (identityManager == null) {
              buildIdMgr();
          }
          if (securityHandler == null) {
              buildSecurityHandler();
          }
          this.securityHandler.handleRequest(exchange);
      }
  
      private void buildSecurityHandler() {
          HttpHandler handler = this.next;
          handler = new AuthenticationCallHandler(handler);
          handler = new AuthenticationConstraintHandler(handler);
          final List<AuthenticationMechanism> mechanisms
                  = Collections.<AuthenticationMechanism> singletonList(new BasicAuthenticationMechanism("My Realm"));
          handler = new AuthenticationMechanismsHandler(handler, mechanisms);
          this.securityHandler = new SecurityInitialHandler(AuthenticationMode.PRO_ACTIVE, identityManager, handler);
  
      }
  
      private void buildIdMgr() {
          final Map<String, char[]> users = new HashMap<>(1);
          users.put("guest", "secret".toCharArray());
  
          identityManager = new MapIdentityManager(users);
      }
  
      public void setNext(HttpHandler nextHandler) {
          this.next = nextHandler;
      }
  
  }
  