github.com/mojocn/base64Captcha

func GetCaptcha(c *gin.Context){
	driver := base64Captcha.NewDriverDigit(80, 240, 5, 0.7, 80)
	cp := base64Captcha.NewCaptcha(driver, store)
	id, b64s, err := cp.Generate()
	if err != nil {
		zap.S().Errorf("生成验证码错误: %s", err.Error())
		c.JSON(http.StatusInternalServerError, gin.H{
			"msg":"生成验证码错误",
		})
		return
	}
	c.JSON(http.StatusOK, gin.H{
		"captchaId": id,
		"picPath": b64s,
	})
}