O Fess também inclui um rastreador (Crawler), que pode rastrear documentos em um [servidor web](https://fess.codelibs.org/15.3/admin/webconfig-guide.html), [sistema de arquivos](https://fess.codelibs.org/15.3/admin/fileconfig-guide.html) ou [Data Store](https://fess.codelibs.org/15.3/admin/dataconfig-guide.html)...

            file.delete();
            file.mkdirs();
            file.deleteOnExit();
            fileTransformer.setPath(file.getAbsolutePath());
            crawler.addUrl(url + "sitemaps.xml");
            crawler.crawlerContext.setMaxAccessCount(maxCount);
            crawler.crawlerContext.setNumOfThread(numOfThread);
            crawler.urlFilter.addInclude(url + ".*");

   * symbolic link), that directory is deleted and replaced by a symbolic link to an outside
   * directory before the call that opens the directory to read its entries. File systems that
   * support {@code SecureDirectoryStream} do not have this vulnerability.
   */
  ALLOW_INSECURE

     * specified for this filter. The wildcard has no influence on this
     * method as the server should have performed that filtering already. The
     * attributes are asserted here only because server file systems may not
     * support filtering by all attributes (e.g. even though ATTR_DIRECTORY was
     * specified the server may still return objects that are not directories).
     */
    @Override

        </field>
      </fields>
    </class>
    <class>
      <name>ActivationOS</name>
      <version>1.0.0</version>
      <description><![CDATA[
        This is an activator which will detect an operating system's attributes in order to activate
        its profile.
      ]]></description>
      <fields>
        <field>
          <name>name</name>
          <version>1.0.0</version>
          <type>String</type>

 *
 * <p>The temporary directory used by Curl is defined by the {@code tmpDir} field, which is initialized
 * to the system's temporary directory.</p>
 */
public class Curl {

    /**
     * The temporary directory used by Curl. It is initialized to the system's temporary directory.
     */
    public static final File tmpDir = new File(System.getProperty("java.io.tmpdir"));

    /**

<div class="termy">

```console
$ pip install websockets

---> 100%
```

</div>

## Cliente WebSockets { #websockets-client }

### En producción { #in-production }

En tu sistema de producción, probablemente tengas un frontend creado con un framework moderno como React, Vue.js o Angular.

Y para comunicarte usando WebSockets con tu backend probablemente usarías las utilidades de tu frontend.

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.crawler.entity;

import java.io.Serializable;

/**
 * Represents an alternate link entry within a sitemap URL.
 * This class encapsulates the properties of an alternate link as defined in the hreflang annotation.
 *
 * <p>
 * The hreflang attribute tells search engines about alternate versions of a page in different languages

			<component
				class="org.codelibs.fess.crawler.processor.impl.SitemapsResponseProcessor">
			</component>
		</property>
		<postConstruct name="addRule">
			<arg>"url"</arg>
			<arg>".*sitemap.*"</arg>
		</postConstruct>
	</component>

	<component name="fileRule" class="org.codelibs.fess.crawler.rule.impl.RegexRule">
		<property name="ruleId">"fileRule"</property>
		<property name="defaultRule">true</property>

* a subclasse
* a classe filha
* a classe irmã
* o método de classe

* o cabeçalho
* os cabeçalhos
* o cabeçalho de autorização
* o cabeçalho `Authorization`
* o cabeçalho encaminhado

* o sistema de injeção de dependências
* a dependência
* o dependable
* o dependant

* limitado por I/O
* limitado por CPU
* concorrência
* paralelismo
* multiprocessamento

* a env var