validator.validate(settings, problems);
        assertEquals(1, problems.messages.size());
        assertContains(problems.messages.get(0), "'proxies.proxy.host' for default is missing");
    }

    private static class SimpleProblemCollector implements SettingsProblemCollector {

        public List<String> messages = new ArrayList<>();

    public static final String DEFAULT_LABEL_VALUE_PROPERTY = "label.value";

    public static final String DEFAULT_SORT_VALUE_PROPERTY = "sort.value";

    public static final String VIRTUAL_HOST_VALUE_PROPERTY = "virtual.host.value";

    public static final String LOGIN_REQUIRED_PROPERTY = "login.required";

    public static final String RESULT_COLLAPSED_PROPERTY = "result.collapsed";

 * but given that any public suffix may become a host without warning, it is better to err on the
 * side of permissiveness and thus avoid spurious rejection of valid sites. Of course, to actually
 * determine addressability of any host, clients of this class will need to perform their own DNS
 * lookups.
 *
 * <p>During construction, names are normalized in two ways:
 *
 * <ol>

            return false;
        }
    }

    private static boolean isLocal(String host) {
        return "localhost".equals(host) || "127.0.0.1".equals(host);
    }

    /**
     * Checks the URL to see if this repository refers to a non-localhost repository using HTTP.
     *
     * @param originalRepository

    /** The key of the message: Duplicate Host */
    public static final String LABELS_duplicate_host_configuration = "{labels.duplicate_host_configuration}";

    /** The key of the message: Duplicate Host */
    public static final String LABELS_duplicate_host_title_details = "{labels.duplicate_host_title_details}";

    /** The key of the message: System Configuration */

                            null,
                            "must be unique but found duplicate proxy with id " + proxy.getId());
                }
                validateStringNotEmpty(problems, "proxies.proxy.host", proxy.getHost(), proxy.getId());

                try {
                    Integer.parseInt(proxy.getPortString());
                } catch (NumberFormatException e) {
                    addViolation(

   *
   * @since 17.0
   */
  public static final String FOLLOW_ONLY_WHEN_PRERENDER_SHOWN = "Follow-Only-When-Prerender-Shown";
  /** The HTTP {@code Host} header field name. */
  public static final String HOST = "Host";
  /**
   * The HTTP <a href="https://tools.ietf.org/html/rfc7540#section-3.2.1">{@code HTTP2-Settings}
   * </a> header field name.
   *
   * @since 24.0
   */

            sb.append(LS);

            // If people want to deploy it
            sb.append(LS);
            sb.append(indentation);
            sb.append("Alternatively, if you host your own repository you can deploy the file there: ");
            sb.append(LS);
            sb.append(indentation);
            sb.append("    mvn deploy:deploy-file -DgroupId=");
            sb.append(groupId);

                rhList.toArray(new org.codelibs.fess.crawler.client.http.RequestHeader[rhList.size()]));

        final String proxyHost = (String) paramMap.get(Param.Client.PROXY_HOST);
        final String proxyPort = (String) paramMap.get(Param.Client.PROXY_PORT);
        if (StringUtil.isNotBlank(proxyHost) && StringUtil.isNotBlank(proxyPort)) {
            // proxy credentials

            ptList.add(Constants.PROCESS_TYPE_BOTH);
            pathMappingHelper.setPathMappingList(options.sessionId, pathMappingService.getPathMappingList(ptList));

            // duplicate host
            try {
                final DuplicateHostHelper duplicateHostHelper = ComponentUtil.getDuplicateHostHelper();
                duplicateHostHelper.init();
            } catch (final Exception e) {