package com.armedia.acm.web.api;

/*-
 * #%L
 * ACM Shared Web Artifacts
 * %%
 * Copyright (C) 2014 - 2018 ArkCase LLC
 * %%
 * This file is part of the ArkCase software. 
 * 
 * If the software was purchased under a paid ArkCase license, the terms of 
 * the paid license agreement will prevail.  Otherwise, the software is 
 * provided under the following open source license terms:
 * 
 * ArkCase is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *  
 * ArkCase is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with ArkCase. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import org.apache.commons.fileupload.FileUploadBase;
import org.apache.commons.fileupload.servlet.ServletRequestContext;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;

import javax.servlet.http.HttpServletRequest;

/**
 * @author Lazo Lazarev a.k.a. Lazarius Borg @ zerogravity May 10, 2017
 *
 */
public class AcmMultipartResolver extends CommonsMultipartResolver
{
    /**
     * Constant for HTTP POST method.
     */
    private static final String POST_METHOD = "POST";

    /**
     * Constant for HTTP PUT method.
     */
    private static final String PUT_METHOD = "PUT";

    /*
     * (non-Javadoc)
     * @see org.springframework.web.multipart.commons.CommonsMultipartResolver#isMultipart(javax.servlet.http.
     * HttpServletRequest)
     */
    @Override
    public boolean isMultipart(HttpServletRequest request)
    {
        return (request != null && isMultipartContent(request));
    }

    private final boolean isMultipartContent(HttpServletRequest request)
    {
        if (!POST_METHOD.equalsIgnoreCase(request.getMethod()) && !PUT_METHOD.equalsIgnoreCase(request.getMethod()))
        {
            return false;
        }
        return FileUploadBase.isMultipartContent(new ServletRequestContext(request));
    }
}