content: /*******************************************************************************
   * 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
   * @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;
  	}
  }
  