com.cuisongliu.kaptcha.autoconfigure.controller.KaptchaController Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of kaptcha-spring-boot-autoconfigure Show documentation
kaptcha integration with springboot.
There is a newer version: 1.3
Show newest version
package com.cuisongliu.kaptcha.autoconfigure.controller;
/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2018 [email protected]
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

import com.cuisongliu.kaptcha.autoconfigure.properties.KaptchaProperties;
import com.cuisongliu.kaptcha.autoconfigure.util.KaptchaUtil;
import com.google.code.kaptcha.Producer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;

/**
 * kaptcha 验证码controller
 *
 * @author cuisongliu [[email protected]]
 * @since 2018-01-02 21:24
 */
@Controller
@RequestMapping("/kaptcha")
public class KaptchaController {
    @Autowired
    private KaptchaProperties kaptchaProperties;

    @Autowired
    @Qualifier("kaptcha")
    private Producer producer;


    /**
     * 生成验证码
     * @since 1.7+
     */
    @RequestMapping
    public void index(HttpServletRequest request, HttpServletResponse response) {
        HttpSession session = request.getSession();

        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 capText = producer.createText();

        // store the text in the session
        String suffix = request.getParameter(kaptchaProperties.getSuffix());
        session.setAttribute(KaptchaUtil.kaptchaKeyGenerator(suffix), capText);
        // create the image with the text
        BufferedImage bi = producer.createImage(capText);
        ServletOutputStream out = null;
        try {
            out = response.getOutputStream();
        } catch (IOException e) {
            e.printStackTrace();
        }

        // write the data out
        try {
            ImageIO.write(bi, "jpg", out);
        } catch (IOException e) {
            e.printStackTrace();
        }
        try {
            try {
                out.flush();
            } catch (IOException e) {
                e.printStackTrace();
            }
        } finally {
            try {
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }


}