/*******************************************************************************
 * Copyright 2017 Bstek
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package com.bstek.ureport.console.image;

import com.bstek.ureport.cache.ResourceCache;
import com.bstek.ureport.console.ServletAction;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * @author Jacky.gao
 * @since 2016年6月6日
 */
public class ImageServletAction implements ServletAction {
    public static final String URL = "/image";

    @Override
    public void execute(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String key = req.getParameter("_key");
        if (StringUtils.isNotBlank(key)) {
            byte[] bytes = (byte[]) ResourceCache.getObject(key);
            InputStream input = new ByteArrayInputStream(bytes);
            OutputStream output = resp.getOutputStream();
            resp.setContentType("image/png");
            try {
                IOUtils.copy(input, output);
            } finally {
                IOUtils.closeQuietly(input);
                IOUtils.closeQuietly(output);
            }
        } else {
            //processImage(req, resp);
        }
    }

    @Override
    public String url() {
        return URL;
    }
}
