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The core jetty server artifact.
There is a newer version: 12.0.13
//
//  ========================================================================
//  Copyright (c) 1995-2019 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.server;

import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.Cookie;

import org.eclipse.jetty.http.ComplianceViolation;
import org.eclipse.jetty.http.CookieCompliance;
import org.eclipse.jetty.http.CookieCutter;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;

/**
 * Cookie parser
 * Optimized stateful cookie parser.  Cookies fields are added with the
 * {@link #addCookieField(String)} method and parsed on the next subsequent
 * call to {@link #getCookies()}.
 * If the added fields are identical to those last added (as strings), then the
 * cookies are not re parsed.
 */
public class Cookies extends CookieCutter
{
    protected static final Logger LOG = Log.getLogger(Cookies.class);
    protected final List _rawFields = new ArrayList<>();
    protected final List _cookieList = new ArrayList<>();
    private int _addedFields;
    private boolean _parsed = false;
    private Cookie[] _cookies;
    private boolean _set = false;

    public Cookies()
    {
        this(CookieCompliance.RFC6265, null);
    }

    public Cookies(CookieCompliance compliance, ComplianceViolation.Listener complianceListener)
    {
        super(compliance, complianceListener);
    }

    public void addCookieField(String rawField)
    {
        if (_set)
            throw new IllegalStateException();

        if (rawField == null)
            return;
        rawField = rawField.trim();
        if (rawField.length() == 0)
            return;

        if (_rawFields.size() > _addedFields)
        {
            if (rawField.equals(_rawFields.get(_addedFields)))
            {
                _addedFields++;
                return;
            }

            while (_rawFields.size() > _addedFields)
            {
                _rawFields.remove(_addedFields);
            }
        }
        _rawFields.add(_addedFields++, rawField);
        _parsed = false;
    }

    public Cookie[] getCookies()
    {
        if (_set)
            return _cookies;

        while (_rawFields.size() > _addedFields)
        {
            _rawFields.remove(_addedFields);
            _parsed = false;
        }

        if (_parsed)
            return _cookies;

        parseFields(_rawFields);
        _cookies = (Cookie[])_cookieList.toArray(new Cookie[_cookieList.size()]);
        _cookieList.clear();
        _parsed = true;
        return _cookies;
    }

    public void setCookies(Cookie[] cookies)
    {
        _cookies = cookies;
        _set = true;
    }

    public void reset()
    {
        if (_set)
            _cookies = null;
        _set = false;
        _addedFields = 0;
    }

    @Override
    protected void addCookie(String name, String value, String domain, String path, int version, String comment)
    {
        try
        {
            Cookie cookie = new Cookie(name, value);
            if (domain != null)
                cookie.setDomain(domain);
            if (path != null)
                cookie.setPath(path);
            if (version > 0)
                cookie.setVersion(version);
            if (comment != null)
                cookie.setComment(comment);
            _cookieList.add(cookie);
        }
        catch (Exception e)
        {
            LOG.debug(e);
        }
    }
}