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.apache.commons.lang3.StringUtils;
  import org.apache.logging.log4j.Level;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  import org.b3log.latke.Keys;
  import org.b3log.latke.Latkes;
  import org.b3log.latke.http.HttpMethod;
  import org.b3log.latke.http.RequestContext;
  import org.b3log.latke.http.function.Handler;
  import org.b3log.latke.ioc.BeanManager;
  import org.b3log.latke.repository.RepositoryException;
  import org.b3log.solo.model.Article;
  import org.b3log.solo.model.Option;
  import org.b3log.solo.repository.ArticleRepository;
  import org.b3log.solo.service.InitService;
  import org.b3log.solo.service.OptionQueryService;
  import org.b3log.solo.service.PermalinkQueryService;
  import org.b3log.solo.util.Solos;
  import org.b3log.solo.util.Statics;
  import org.json.JSONObject;
  
  /**
   * Article permalink  handler.
   *
   * @author <a href="http://88250.b3log.org">Liang Ding</a>
   * @version 1.0.0.5, May 23, 2020
   * @since 3.2.0
   */
  public class PermalinkHandler implements Handler {
  
      /**
       * Logger.
       */
      private static final Logger LOGGER = LogManager.getLogger(PermalinkHandler.class);
  
      /**
       * Whether initialization info reported.
       */
      private static boolean initReported;
  
      @Override
      public void handle(final RequestContext context) {
          final BeanManager beanManager = BeanManager.getInstance();
  
          JSONObject article;
          try {
              final InitService initService = beanManager.getReference(InitService.class);
              if (!initService.isInited()) {
                  context.handle();
                  return;
              }
  
              final String requestURI = context.requestURI();
              final String contextPath = Latkes.getContextPath();
              final String permalink = StringUtils.substringAfter(requestURI, contextPath);
              if (PermalinkQueryService.invalidPermalinkFormat(permalink)) {
                  LOGGER.log(Level.DEBUG, "Skip permalink handling request [URI={}]", permalink);
                  context.handle();
                  return;
              }
  
              // 尝试走静态化缓存
              final String html = Statics.get(context);
              if (StringUtils.isNotBlank(html)) {
                  context.getResponse().setContentType("text/html; charset=utf-8");
                  context.sendString(html);
                  context.abort();
                  return;
              }
  
              final ArticleRepository articleRepository = beanManager.getReference(ArticleRepository.class);
              article = articleRepository.getByPermalink(permalink);
              if (null == article) {
                  LOGGER.log(Level.DEBUG, "Not found article with permalink [{}]", permalink);
                  context.handle();
                  return;
              }
          } catch (final RepositoryException e) {
              LOGGER.log(Level.ERROR, "Processes article permalink handler failed", e);
              context.sendError(404);
              return;
          }
  
          // If requests an article and the article need view password, sends redirect to the password form
          if (Solos.needViewPwd(context, article)) {
              try {
                  context.sendRedirect(Latkes.getServePath() + "/console/article-pwd?articleId=" + article.optString(Keys.OBJECT_ID));
                  return;
              } catch (final Exception e) {
                  context.sendError(404);
                  return;
              }
          }
  
          final OptionQueryService optionQueryService = beanManager.getReference(OptionQueryService.class);
          final JSONObject preference = optionQueryService.getPreference();
          final boolean allowVisitDraftViaPermalink = preference.getBoolean(Option.ID_C_ALLOW_VISIT_DRAFT_VIA_PERMALINK);
          if (Article.ARTICLE_STATUS_C_PUBLISHED != article.optInt(Article.ARTICLE_STATUS) && !allowVisitDraftViaPermalink) {
              context.sendError(404);
              return;
          }
  
          dispatchToArticleProcessor(context, article);
          context.handle();
      }
  
      /**
       * Dispatches the specified request to the specified article processor with the specified response.
       *
       * @param context the specified request context
       * @param article the specified article
       */
      private void dispatchToArticleProcessor(final RequestContext context, final JSONObject article) {
          context.attr(Article.ARTICLE, article);
          context.attr(Keys.HttpRequest.REQUEST_URI, Latkes.getContextPath() + "/article");
          context.attr(Keys.HttpRequest.REQUEST_METHOD, HttpMethod.GET.name());
      }
  }
  