Fess 基于 [OpenSearch](https://github.com/opensearch-project/OpenSearch)，但不需要 OpenSearch 的知识或经验。Fess 提供了一个易于使用的管理 GUI，您可以通过浏览器配置系统。Fess 还包含一个爬虫，能够抓取 [Web 服务器](https://fess.codelibs.org/15.3/admin/webconfig-guide.html)、[文件系统](https://fess.codelibs.org/15.3/admin/fileconfig-guide.html)或[数据存储](https://fess.codelibs.org/15.3/admin/dataconfig-guide.html)（如 CSV 或数据库）中的文档。Fess 支持多种文件格式，包括但不限于：Microsoft Office、PDF 和 zip。

 - [Git](https://github.com/codelibs/fess-ds-git)
 - [Gitbucket](https://github.com/codelibs/fess-ds-gitbucket)
 - [G Suite](https://github.com/codelibs/fess-ds-gsuite)
 - [JSON](https://github.com/codelibs/fess-ds-json)
 - [Office 365](https://github.com/codelibs/fess-ds-office365)
 - [S3](https://github.com/codelibs/fess-ds-s3)
 - [Salesforce](https://github.com/codelibs/fess-ds-salesforce)

	<component name="crawlingInfoBhv" class="org.codelibs.fess.opensearch.config.exbhv.CrawlingInfoBhv"/>
	<component name="crawlingInfoParamBhv" class="org.codelibs.fess.opensearch.config.exbhv.CrawlingInfoParamBhv"/>
	<component name="dataConfigBhv" class="org.codelibs.fess.opensearch.config.exbhv.DataConfigBhv"/>

 - [Gitbucket](https://github.com/codelibs/fess-ds-gitbucket)
 - [G Suite](https://github.com/codelibs/fess-ds-gsuite)
 - [JSON](https://github.com/codelibs/fess-ds-json)
 - [Office 365](https://github.com/codelibs/fess-ds-office365)
 - [S3](https://github.com/codelibs/fess-ds-s3)
 - [Salesforce](https://github.com/codelibs/fess-ds-salesforce)
 - [SharePoint](https://github.com/codelibs/fess-ds-sharepoint)

</script>
<gcse:search></gcse:search>
```

With Fess Site Search:

```javascript
<!-- Fess Site Search -->
<script>
  (function() {
    var fess = document.createElement('script');
    fess.type = 'text/javascript';
    fess.async = true;
    fess.src = '//<Fess Server>/js/ss/fess-ss.min.js';
    fess.charset = 'utf-8';
    fess.setAttribute('id', 'fess-ss');
    fess.setAttribute('fess-url', '//<Fess Server>/json');

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.crawler.util;

import org.dbflute.utflute.core.PlainTestCase;

/**
 * Test class for CharUtil.
 *
 * @author shinsuke
 */
public class CharUtilTest extends PlainTestCase {

 - [Box](https://github.com/codelibs/fess-ds-box)
 - [CSV](https://github.com/codelibs/fess-ds-csv)
 - [Database](https://github.com/codelibs/fess-ds-db)
 - [Dropbox](https://github.com/codelibs/fess-ds-dropbox)
 - [Elasticsearch](https://github.com/codelibs/fess-ds-elasticsearch)
 - [Git](https://github.com/codelibs/fess-ds-git)
 - [Gitbucket](https://github.com/codelibs/fess-ds-gitbucket)

 - [Database](https://github.com/codelibs/fess-ds-db)
 - [Dropbox](https://github.com/codelibs/fess-ds-dropbox)
 - [Elasticsearch](https://github.com/codelibs/fess-ds-elasticsearch)
 - [Git](https://github.com/codelibs/fess-ds-git)
 - [Gitbucket](https://github.com/codelibs/fess-ds-gitbucket)
 - [G Suite](https://github.com/codelibs/fess-ds-gsuite)
 - [JSON](https://github.com/codelibs/fess-ds-json)

 - [Dropbox](https://github.com/codelibs/fess-ds-dropbox)
 - [Elasticsearch](https://github.com/codelibs/fess-ds-elasticsearch)
 - [Git](https://github.com/codelibs/fess-ds-git)
 - [Gitbucket](https://github.com/codelibs/fess-ds-gitbucket)
 - [G Suite](https://github.com/codelibs/fess-ds-gsuite)
 - [JSON](https://github.com/codelibs/fess-ds-json)
 - [Office 365](https://github.com/codelibs/fess-ds-office365)

	</component>
	<component name="relatedContentHelper" class="org.codelibs.fess.helper.RelatedContentHelper">
	</component>
	<component name="relatedQueryHelper" class="org.codelibs.fess.helper.RelatedQueryHelper">
	</component>
	<component name="pluginHelper" class="org.codelibs.fess.helper.PluginHelper">
	</component>
	<component name="searchHelper" class="org.codelibs.fess.helper.SearchHelper">
	</component>