package com.gkhy.exam.admin.controller.system;
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import cn.hutool.core.codec.Base64;
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import cn.hutool.core.lang.UUID;
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import com.gkhy.exam.common.api.CommonResult;
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import com.gkhy.exam.common.constant.CacheConstant;
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import com.gkhy.exam.common.utils.RedisUtils;
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import com.gkhy.exam.system.service.SysConfigService;
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import com.google.code.kaptcha.Producer;
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import io.swagger.annotations.Api;
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import io.swagger.annotations.ApiOperation;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.util.FastByteArrayOutputStream;
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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.bind.annotation.RestController;
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import javax.annotation.Resource;
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import javax.imageio.ImageIO;
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import java.awt.image.BufferedImage;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.concurrent.TimeUnit;
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@Api(tags = "验证码前端控制器")
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@RestController
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@RequestMapping("/system/captcha")
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public class CaptchaController
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{
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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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@Autowired
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private SysConfigService configService;
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@Autowired
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private RedisUtils redisUtils;
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/**
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* 生成验证码
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*/
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@ApiOperation(value = "生成验证码")
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@GetMapping("/captchaImage")
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public CommonResult captchaImage(){
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Map<String,Object> map=new HashMap<>();
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boolean captchaEnabled=configService.selectCaptchaEnabled();
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map.put("captchaEnabled", captchaEnabled);
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if(!captchaEnabled){
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return CommonResult.success(captchaEnabled);
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}
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// 保存验证码信息
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String uuid = UUID.randomUUID().toString();
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String verifyKey = CacheConstant.CAPTCHA_CODE_KEY + uuid;
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String capStr = null, code = null;
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BufferedImage image = null;
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// 生成验证码
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String captchaType = "math";
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if ("math".equals(captchaType))
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{
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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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image = captchaProducerMath.createImage(capStr);
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}
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else if ("char".equals(captchaType))
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{
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capStr = code = captchaProducer.createText();
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image = captchaProducer.createImage(capStr);
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}
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redisUtils.set(verifyKey, code, 2, TimeUnit.MINUTES);
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// 转换流信息写出
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FastByteArrayOutputStream os = new FastByteArrayOutputStream();
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try
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{
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ImageIO.write(image, "jpg", os);
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}
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catch (IOException e)
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{
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return CommonResult.failed(e.getMessage());
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}
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map.put("uuid",uuid);
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map.put("image", Base64.encode(os.toByteArray()));
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return CommonResult.success(map);
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}
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}
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