67 lines
2.0 KiB
Java
67 lines
2.0 KiB
Java
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package com.nis.web.controller;
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import java.awt.image.BufferedImage;
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import java.io.IOException;
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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 org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Controller;
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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 com.google.code.kaptcha.Constants;
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import com.google.code.kaptcha.Producer;
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@Controller
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public class CaptchaProducerController {
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@Autowired
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private Producer captchaProducer;
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@RequestMapping("captcha-image")
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public ModelAndView handleRequest(HttpServletRequest request,HttpServletResponse response) throws IOException{
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// Set to expire far in the past.
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response.setDateHeader("Expires", 0);
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// Set standard HTTP/1.1 no-cache headers.
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response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
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// Set IE extended HTTP/1.1 no-cache headers (use addHeader).
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response.addHeader("Cache-Control", "post-check=0, pre-check=0");
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// Set standard HTTP/1.0 no-cache header.
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response.setHeader("Pragma", "no-cache");
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// return a jpeg
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response.setContentType("image/jpeg");
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// create the text for the image
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String capText = captchaProducer.createText();
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// store the text in the session
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request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText.toUpperCase());
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// create the image with the text
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BufferedImage bi = captchaProducer.createImage(capText);
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ServletOutputStream out = response.getOutputStream();
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// write the data out
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ImageIO.write(bi, "jpg", out);
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try
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{
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out.flush();
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}
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finally
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{
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out.close();
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}
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return null;
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}
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}
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