package main.com.smart.controller;

 import com.google.code.kaptcha.Producer;

 import main.com.smart.utils.CaptchaProducer;

 import main.com.smart.utils.RedisClient;

 import org.apache.log4j.Logger;

 import org.apache.log4j.spi.LoggerFactory;

 import org.springframework.beans.factory.annotation.Autowired;

 import org.springframework.stereotype.Controller;

 import org.springframework.web.bind.annotation.RequestMapping;

 import org.springframework.web.servlet.ModelAndView;

 import javax.imageio.ImageIO;

 import javax.servlet.ServletOutputStream;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import javax.servlet.http.HttpSession;

 import com.google.code.kaptcha.Constants;

 import java.awt.image.BufferedImage;

 /**

  * 验证码 生成控制器

  *

  * @author yang ming

  * @create 2016-04-29 12:17

  */

 @Controller

 @RequestMapping("/kaptcha")

 public class CaptchaController {

     /**

      * 使用方法

      * get: http://localhost:8080/smart/kaptcha

      */

     private static final Logger log = Logger.getLogger(CaptchaController.class);

     @Autowired

     private Producer captchaProducer = null;

     @RequestMapping

     public ModelAndView getKaptchaImage(HttpServletRequest request, HttpServletResponse response) throws Exception {

         RedisClient client = RedisClient.getInstance();

         //在控制器中获取验证码

         //String kaptchaExpected = (String) request.getSession().getAttribute(com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY);

         log.info("获取验证");

         log.info(Constants.KAPTCHA_SESSION_KEY);

         HttpSession session = request.getSession();

         String code1 = client.getValue(Constants.KAPTCHA_SESSION_KEY);

         String code = String.valueOf(session.getAttribute(Constants.KAPTCHA_SESSION_KEY));

         //System.out.println("******************验证码是: " + code + "******************");

         response.setDateHeader("Expires", 0);

         // Set standard HTTP/1.1 no-cache headers.

         response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");

         // Set IE extended HTTP/1.1 no-cache headers (use addHeader).

         response.addHeader("Cache-Control", "post-check=0, pre-check=0");

         // Set standard HTTP/1.0 no-cache header.

         response.setHeader("Pragma", "no-cache");

         // return a jpeg

         response.setContentType("image/jpeg");

         // create the text for the image

         String[] array = CaptchaProducer.getCaptchaText();

         //String capText = captchaProducer.createText();

         //int param1 = (int)capText.charAt(0);

         //int param2 = (int)capText.charAt(1);

         Integer result =  Integer.valueOf(array[0]) + Integer.valueOf(array[1]);

         // store the text in the session

         client.setValue(Constants.KAPTCHA_SESSION_KEY, result.toString());

         //session.setAttribute(Constants.KAPTCHA_SESSION_KEY, result);

         // create the image with the text

         BufferedImage bi = captchaProducer.createImage(array[0]+"+"+array[1]+"=?");

         ServletOutputStream out = response.getOutputStream();

         // write the data out

         ImageIO.write(bi, "jpg", out);

         try {

             out.flush();

         } finally {

             out.close();

         }

         return null;

     }

 }