content: /*
   * Solo - A small and beautiful blogging system written in Java.
   * Copyright (c) 2010-present, b3log.org
   *
   * Solo is licensed under Mulan PSL v2.
   * You can use this software according to the terms and conditions of the Mulan PSL v2.
   * You may obtain a copy of Mulan PSL v2 at:
   *         http://license.coscl.org.cn/MulanPSL2
   * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
   * See the Mulan PSL v2 for more details.
   */
  package org.b3log.solo.processor;
  
  import org.b3log.latke.Keys;
  import org.b3log.latke.http.RequestContext;
  import org.b3log.latke.http.function.Handler;
  import org.b3log.latke.util.Requests;
  import org.b3log.latke.util.Stopwatchs;
  import org.b3log.solo.util.Solos;
  
  /**
   * Before request handler.
   *
   * @author <a href="http://88250.b3log.org">Liang Ding</a>
   * @version 1.0.0.2, Jan 12, 2020
   * @since 3.6.7
   */
  public class BeforeRequestHandler implements Handler {
  
      @Override
      public void handle(final RequestContext context) {
          context.attr(Keys.HttpRequest.START_TIME_MILLIS, System.currentTimeMillis());
          final String remoteAddr = Requests.getRemoteAddr(context.getRequest());
          if (Solos.BLACKLIST_IPS.contains(remoteAddr)) {
              context.setStatus(429);
              context.setHeader("Retry-After", "600");
              context.sendString("Too Many Requests");
              context.abort();
              return;
          }
  
          Stopwatchs.start("Request Initialized [requestURI=" + context.requestURI() + "]");
      }
  }
  