- [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)
 - [G Suite](https://github.com/codelibs/fess-ds-gsuite)
 - [JSON](https://github.com/codelibs/fess-ds-json)

    <function-class>org.codelibs.fess.taglib.FessFunctions</function-class>
    <function-signature>java.lang.String label(java.lang.String)</function-signature>
    <example>
      ${fe:label("value")}
    </example>
  </function>

  <function>
    <description>
      Returns Date from a given value.
    </description>
    <name>date</name>
    <function-class>org.codelibs.fess.taglib.FessFunctions</function-class>

 */
package org.codelibs.core.io;

import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Writer;
import java.net.URL;
import java.util.Properties;

import org.codelibs.core.exception.IORuntimeException;

 */
package org.codelibs.core.misc;

import static org.codelibs.core.misc.AssertionUtil.assertArgument;
import static org.codelibs.core.misc.AssertionUtil.assertArgumentNotNull;
import static org.codelibs.core.misc.AssertionUtil.assertIndex;
import static org.codelibs.core.misc.AssertionUtil.assertState;
import static org.hamcrest.CoreMatchers.is;

import org.codelibs.core.exception.ClIllegalArgumentException;

- `org.codelibs.curl.CurlRequest`: builder for HTTP requests.
- `org.codelibs.curl.CurlResponse`: wrapper for HTTP responses.
- `org.codelibs.curl.CurlException`: unchecked exception for errors.
- `org.codelibs.curl.io.ContentCache` and `ContentOutputStream`: internal utilities for streaming and caching.

Refer to the Javadoc for full API details.

## Building and Testing

```bash

import org.apache.logging.log4j.Logger;
import org.codelibs.core.exception.IORuntimeException;
import org.codelibs.core.io.CloseableUtil;
import org.codelibs.core.io.FileUtil;
import org.codelibs.core.io.InputStreamUtil;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.timer.TimeoutManager;
import org.codelibs.core.timer.TimeoutTask;
import org.codelibs.fess.crawler.Constants;
import org.codelibs.fess.crawler.builder.RequestDataBuilder;

import org.codelibs.fess.crawler.entity.AccessResultImpl;
import org.codelibs.fess.crawler.entity.UrlQueue;
import org.codelibs.fess.crawler.entity.UrlQueueImpl;
import org.codelibs.fess.crawler.helper.MemoryDataHelper;
import org.codelibs.fess.crawler.service.UrlQueueService;

import jakarta.annotation.Resource;

/**
 * Implementation of the {@link UrlQueueService} interface.

import java.util.Map;
import java.util.Set;

import org.codelibs.core.beans.BeanDesc;
import org.codelibs.core.beans.ConstructorDesc;
import org.codelibs.core.beans.FieldDesc;
import org.codelibs.core.beans.MethodDesc;
import org.codelibs.core.beans.ParameterizedClassDesc;
import org.codelibs.core.beans.PropertyDesc;
import org.codelibs.core.collection.ArrayMap;
import org.codelibs.core.collection.CaseInsensitiveMap;

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

import java.util.ArrayList;
import java.util.List;

import org.codelibs.fess.crawler.entity.ResponseData;
import org.codelibs.fess.crawler.rule.Rule;
import org.codelibs.fess.crawler.rule.RuleManager;

/**
 * Implementation of the {@link RuleManager} interface.

import org.codelibs.fess.crawler.entity.ExtractData;
import org.codelibs.fess.crawler.entity.ResponseData;
import org.codelibs.fess.crawler.entity.ResultData;
import org.codelibs.fess.crawler.exception.CrawlerSystemException;
import org.codelibs.fess.crawler.exception.CrawlingAccessException;
import org.codelibs.fess.crawler.extractor.Extractor;
import org.codelibs.fess.crawler.extractor.ExtractorFactory;