## Install `PyJWT` { #install-pyjwt }

We need to install `PyJWT` to generate and verify the JWT tokens in Python.

Make sure you create a [virtual environment](../../virtual-environments.md){.internal-link target=_blank}, activate it, and then install `pyjwt`:

<div class="termy">

```console
$ pip install pyjwt

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE components PUBLIC "-//DBFLUTE//DTD LastaDi 1.0//EN"
	"http://dbflute.org/meta/lastadi10.dtd">
<components>
	<component name="ingestFactory" class="org.codelibs.fess.ingest.IngestFactory">
	</component>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE components PUBLIC "-//DBFLUTE//DTD LastaDi 1.0//EN"
	"http://dbflute.org/meta/lastadi10.dtd">
<components>
	<component name="ssoManager" class="org.codelibs.fess.sso.SsoManager">
	</component>

 */
package org.codelibs.fess.crawler.client.http;

import java.io.Serializable;

import org.codelibs.core.lang.StringUtil;

/**
 * Represents an HTTP request header with a name and value.
 * This class is used to encapsulate the header information for HTTP requests.
 * It provides methods to get and set the name and value of the header,
 * as well as a method to validate the header.
 *
 * <p>Example usage:</p>
 * <pre>

import org.apache.http.auth.AuthScope;
import org.apache.http.auth.Credentials;
import org.codelibs.fess.crawler.client.http.Authentication;

/**
 * Implementation of the {@link Authentication} interface.
 * This class provides methods to handle authentication details such as
 * authentication scope, credentials, and authentication scheme.
 *
 * <p>
 * It includes constructors to initialize these details and getter and setter

/**
 * A specialized ArrayList for storing document data with additional metadata.
 * This class extends ArrayList to hold document maps while tracking content size
 * and processing time metrics. It's used throughout the Fess search system to
 * manage collections of search results and crawled documents.
 *
 */
public class DocList extends ArrayList<Map<String, Object>> {

    /** Serial version UID for serialization */

import jcifs.internal.smb1.trans.SmbComTransactionResponse;

/**
 * Trans2 GetDfsReferral response message for DFS referral queries.
 * This class handles the response from a TRANS2_GET_DFS_REFERRAL request, which returns
 * DFS referral information for redirecting clients to distributed file system targets.
 */
public class Trans2GetDfsReferralResponse extends SmbComTransactionResponse {

    /**
     * Indicates that the referral contains a name list.

import jcifs.internal.util.SMBUtil;

/**
 * SMB1 NetShareEnum request message for enumerating network shares on a server.
 * This class implements the SMB1 transaction to retrieve a list of available shares
 * from the target server, including share names, types, and descriptions.
 */
public class NetShareEnum extends SmbComTransaction {

    private static final String DESCR = "WrLeh\u0000B13BWz\u0000";

    /**

import java.util.Map;

/**
 * {@link HashMap} with an upper limit on the number of entries. When a new entry is added, the oldest entry is discarded using LRU if the limit is exceeded.
 * <p>
 * <strong>Thread-Safety:</strong> This class is <strong>NOT thread-safe</strong>.
 * It extends {@link LinkedHashMap} without synchronization. If multiple threads access
 * an instance concurrently, and at least one thread modifies the map structurally,

        return switch (o) {
        case null -> null;
        case Long l -> l;
        case Number n -> n.longValue();
        case String s -> toLong(s);
        case java.util.Date d -> pattern != null ? Long.valueOf(new SimpleDateFormat(pattern).format(d)) : d.getTime();
        case Boolean b -> b ? 1L : 0L;
        default -> toLong(o.toString());
        };
    }