protected void doGetHtml()

in java/com/google/gitiles/doc/DocServlet.java [83:136]
49 lines of code
7 McCabe index (conditional complexity)

  protected void doGetHtml(HttpServletRequest req, HttpServletResponse res) throws IOException {
    MarkdownConfig cfg = MarkdownConfig.get(getAccess(req).getConfig());
    if (!cfg.render) {
      throw new GitilesRequestFailureException(FailureReason.MARKDOWN_NOT_ENABLED);
    }

    GitilesView view = ViewFilter.getView(req);
    Repository repo = ServletUtils.getRepository(req);
    try (RevWalk rw = new RevWalk(repo)) {
      ObjectReader reader = rw.getObjectReader();
      String path = view.getPathPart();
      RevTree root;
      try {
        root = rw.parseTree(view.getRevision().getId());
      } catch (IncorrectObjectTypeException e) {
        throw new GitilesRequestFailureException(FailureReason.INCORRECT_OBJECT_TYPE, e);
      }

      MarkdownFile srcmd = findFile(rw, root, path);
      if (srcmd == null) {
        throw new GitilesRequestFailureException(FailureReason.OBJECT_NOT_FOUND);
      }

      MarkdownFile navmd = findNavbar(rw, root, path);
      String curEtag = etag(srcmd, navmd);
      if (etagMatch(req, curEtag)) {
        res.setStatus(SC_NOT_MODIFIED);
        return;
      }

      view = view.toBuilder().setPathPart(srcmd.path).build();
      try {
        srcmd.read(reader, cfg);
        if (navmd != null) {
          navmd.read(reader, cfg);
        }
      } catch (LargeObjectException.ExceedsLimit e) {
        fileTooBig(res, view);
        return;
      }

      MarkdownToHtml.Builder fmt =
          MarkdownToHtml.builder()
              .setConfig(cfg)
              .setGitilesView(view)
              .setRequestUri(req.getRequestURI())
              .setReader(reader)
              .setRootTree(root)
              .setHtmlSanitizer(htmlSanitizer.create(req));
      Navbar navbar = createNavbar(cfg, fmt, navmd);
      res.setHeader(HttpHeaders.ETAG, curEtag);
      showDoc(req, res, view, fmt, navbar, srcmd);
    }
  }