*   <li>TIME_TO_LIVE_PROPERTY: Time to live for connections.</li>
 * </ul>
 *
 */
public class HcHttpClient extends AbstractCrawlerClient {

    /**
     * Constructs a new HcHttpClient.
     */
    public HcHttpClient() {
        // Default constructor
    }

    /** Property name for connection timeout setting */

        if (StringUtil.isNotBlank(proxyHost) && StringUtil.isNotBlank(proxyPort)) {
            factoryParamMap.put(HcHttpClient.PROXY_HOST_PROPERTY, proxyHost);
            factoryParamMap.put(HcHttpClient.PROXY_PORT_PROPERTY, proxyPort);
            final String proxyUsername = paramMap.get(CRAWLER_WEB_PREFIX + "proxyUsername");

import org.codelibs.fess.app.service.WebAuthenticationService;
import org.codelibs.fess.crawler.client.CrawlerClientFactory;
import org.codelibs.fess.crawler.client.http.Authentication;
import org.codelibs.fess.crawler.client.http.HcHttpClient;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.opensearch.config.bsentity.BsWebConfig;

        childUrlRuleMap.put("//LINK", "href");
        childUrlRuleMap.put("//SCRIPT", "src");

        container = new StandardCrawlerContainer();
        container.<HcHttpClient> prototype("internalHttpClient", HcHttpClient.class, client -> {
            client.setCookieSpec(CookieSpecs.BEST_MATCH);
        }).prototype("httpClient", FaultTolerantClient.class, client -> {

	<include path="crawler/robotstxt.xml" />
	<include path="crawler/contentlength.xml" />
	<include path="crawler/mimetype.xml" />

	<component name="internalHttpClient" class="org.codelibs.fess.crawler.client.http.HcHttpClient"
		instance="prototype">
		<property name="connectionTimeout">15000</property>
		<property name="soTimeout">30000</property>
	</component>
	<component name="httpClient"

**Core**: `fess-crawler/src/main/java/org/codelibs/fess/crawler/`
- `Crawler.java`, `CrawlerContext.java`, `CrawlerThread.java`

**Clients**: `fess-crawler/src/main/java/org/codelibs/fess/crawler/client/`
- `http/HcHttpClient.java`, `fs/FileSystemClient.java`, `storage/StorageClient.java`

**DI Config**: `fess-crawler-lasta/src/main/resources/crawler.xml`

### Exception Hierarchy

```