package com.ruoyi.web.controller.common;
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import java.util.concurrent.TimeUnit;
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import cn.hutool.captcha.*;
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import cn.hutool.captcha.generator.CodeGenerator;
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import cn.hutool.captcha.generator.MathGenerator;
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import cn.hutool.captcha.generator.RandomGenerator;
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import cn.hutool.core.convert.Convert;
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import cn.hutool.core.util.IdUtil;
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import cn.hutool.core.util.StrUtil;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RestController;
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import com.ruoyi.common.constant.Constants;
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import com.ruoyi.common.core.domain.AjaxResult;
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import com.ruoyi.common.core.redis.RedisCache;
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import javax.annotation.Resource;
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/**
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* 验证码操作处理
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*
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* @author Lion Li
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*/
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@RestController
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public class CaptchaController {
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// 圆圈干扰验证码
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@Resource(name = "CircleCaptcha")
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private CircleCaptcha circleCaptcha;
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// 线段干扰的验证码
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@Resource(name = "LineCaptcha")
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private LineCaptcha lineCaptcha;
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// 扭曲干扰验证码
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@Resource(name = "ShearCaptcha")
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private ShearCaptcha shearCaptcha;
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@Autowired
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private RedisCache redisCache;
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// 验证码类型
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@Value("${captcha.captchaType}")
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private String captchaType;
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// 验证码类别
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@Value("${captcha.captchaCategory}")
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private String captchaCategory;
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// 数字验证码位数
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@Value("${captcha.captchaNumberLength}")
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private int numberLength;
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// 字符验证码长度
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@Value("${captcha.captchaCharLength}")
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private int charLength;
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/**
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* 生成验证码
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*/
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@GetMapping("/captchaImage")
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public AjaxResult getCode() {
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// 保存验证码信息
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String uuid = IdUtil.simpleUUID();
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String verifyKey = Constants.CAPTCHA_CODE_KEY + uuid;
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String capStr = null, code = null;
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// 生成验证码
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CodeGenerator codeGenerator;
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if ("math".equals(captchaType)) {
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codeGenerator = new MathGenerator(numberLength);
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} else if ("char".equals(captchaType)) {
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codeGenerator = new RandomGenerator(charLength);
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} else {
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throw new IllegalArgumentException("验证码类型异常");
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}
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if ("line".equals(captchaCategory)) {
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lineCaptcha.setGenerator(codeGenerator);
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lineCaptcha.createCode();
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capStr = lineCaptcha.getCode();
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} else if ("circle".equals(captchaCategory)) {
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circleCaptcha.setGenerator(codeGenerator);
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circleCaptcha.createCode();
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capStr = circleCaptcha.getCode();
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} else if ("shear".equals(captchaCategory)) {
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shearCaptcha.setGenerator(codeGenerator);
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shearCaptcha.createCode();
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capStr = shearCaptcha.getCode();
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} else {
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throw new IllegalArgumentException("验证码类别异常");
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}
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if ("math".equals(captchaType)) {
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code = getCodeResult(capStr);
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} else if ("char".equals(captchaType)) {
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code = capStr;
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}
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redisCache.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
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circleCaptcha.createImage(capStr);
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AjaxResult ajax = AjaxResult.success();
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ajax.put("uuid", uuid);
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ajax.put("img", circleCaptcha.getImageBase64());
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return ajax;
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}
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private String getCodeResult(String capStr) {
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int a = Convert.toInt(StrUtil.sub(capStr, 0, numberLength).trim());
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char operator = capStr.charAt(numberLength);
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int b = Convert.toInt(StrUtil.sub(capStr, numberLength + 1, numberLength + 1 + numberLength).trim());
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switch (operator) {
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case '*':
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return a * b + "";
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case '+':
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return a + b + "";
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case '-':
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return a - b + "";
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default:
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return "";
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}
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}
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}
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