package com.ots.project.system.user.controller;
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import com.google.code.kaptcha.Constants;
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import com.google.code.kaptcha.Producer;
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import com.ots.framework.web.controller.BaseController;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.servlet.ModelAndView;
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import javax.annotation.Resource;
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import javax.imageio.ImageIO;
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import javax.servlet.ServletOutputStream;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpSession;
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import java.awt.image.BufferedImage;
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import java.io.IOException;
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@Controller
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@RequestMapping("/captcha")
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public class CaptchaController extends BaseController {
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@Resource(name = "captchaProducer")
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private Producer captchaProducer;
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@Resource(name = "captchaProducerMath")
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private Producer captchaProducerMath;
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@GetMapping(value = "/captchaImage")
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public ModelAndView getKaptchaImage(HttpServletRequest request, HttpServletResponse response) {
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ServletOutputStream out = null;
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try {
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HttpSession session = request.getSession();
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response.setDateHeader("Expires", 0);
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response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
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response.addHeader("Cache-Control", "post-check=0, pre-check=0");
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response.setHeader("Pragma", "no-cache");
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response.setContentType("image/jpeg");
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String type = request.getParameter("type");
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String capStr = null;
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String code = null;
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BufferedImage bi = null;
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if ("math".equals(type)) {
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String capText = captchaProducerMath.createText();
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capStr = capText.substring(0, capText.lastIndexOf("@"));
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code = capText.substring(capText.lastIndexOf("@") + 1);
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bi = captchaProducerMath.createImage(capStr);
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} else if ("char".equals(type)) {
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capStr = code = captchaProducer.createText();
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bi = captchaProducer.createImage(capStr);
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}
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session.setAttribute(Constants.KAPTCHA_SESSION_KEY, code);
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out = response.getOutputStream();
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ImageIO.write(bi, "jpg", out);
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out.flush();
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} catch (Exception e) {
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e.printStackTrace();
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} finally {
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try {
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if (out != null) {
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out.close();
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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return null;
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}
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}
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