题外话，有网友说，这玩意根本很容易破解，确实是这样。但验证码这东西，就跟锁子很类似，防君子不防小人。验证码的发明其实是社会文明的退步。因为它阻碍了真正的使用者，却无法阻挡别有用心的人。但又有什么办法呢？

上一篇文章添加了一些基本类，本篇内容主要目的是创建一些接口类

上一节内容：NET 6 实现滑动验证码（二）、基本数据

ValidateResult.cs

在项目根目录下，创建ValidateResult.cs。其功能是提供验证后返回的信息

namespace SlideCaptcha
{
 public class ValidateResult
 {
 public ValidateResultType Result { get; set; }
 public string Message { get; set; }
 public static ValidateResult Success()
 {
 return new ValidateResult { Result = ValidateResultType.Success, Message = "成功" };
 }
 public static ValidateResult Fail()
 {
 return new ValidateResult { Result = ValidateResultType.ValidateFail, Message = "验证失败" };
 }
 public static ValidateResult Timeout()
 {
 return new ValidateResult { Result = ValidateResultType.Timeout, Message = "验证超时" };
 }
 public enum ValidateResultType
 {
 Success = 0,
 ValidateFail = 1,
 Timeout = 2
 }
 }
}

ICaptcha.cs

在Interface文件夹下，建一个ICaptcha.cs，用于生成验证码和进行校验。

using SlideCaptcha.Model;
using System.Threading.Tasks;
namespace SlideCaptcha.Interface
{
 public interface ICaptcha
 {
 /// <summary>
 /// 生成验证码
 /// </summary>
 /// <param name="captchaId">验证码id</param>
 /// <returns></returns>
 Task<CaptchaData> GenerateCaptchaImageAsync(string type, string captchaId = null);
 /// <summary>
 /// 校验
 /// </summary>
 /// <param name="captchaId">验证码id</param>
 /// <param name="slideTrack">滑动轨迹</param>
 /// <returns></returns>
 ValidateResult Validate(string captchaId, SlideTrack slideTrack);
 }
}

IResourceHandler.cs

IResourceHandler.cs 用于生成验证码资源（验证码模板）。

using SlideCaptcha.Model;
using System.Threading.Tasks;
namespace SlideCaptcha.Interface
{
 public interface IResourceHandler
 {
 /// <summary>
 /// 判断传入的资源类型是否存在
 /// </summary>
 /// <param name="handlerType"></param>
 /// <returns></returns>
 bool CanHandle(string handlerType);
 /// <summary>
 /// 生成资源
 /// </summary>
 /// <param name="resource"></param>
 /// <returns></returns>
 Task<byte[]> Handle(Resource resource);
 }
}

IResourceHandlerManager.cs

IResourceHandlerManager.cs用于根据资源（验证码模板），获取资源byte[]数据。

using SlideCaptcha.Model;
using System.Threading.Tasks;
namespace SlideCaptcha.Interface
{
 public interface IResourceHandlerManager
 {
 /// <summary>
 /// 根据资源，生成所需要的byte[]
 /// </summary>
 /// <param name="resource"></param>
 /// <returns></returns>
 Task<byte[]> Handle(Resource resource);
 }
}

IResourceManager.cs

IResourceManager.cs用于获取验证码背景数据与验证码模板数据

using System.Threading.Tasks;
namespace SlideCaptcha.Interface
{
 public interface IResourceManager
 {
 /// <summary>
 /// 随机获取验证码图片背景
 /// </summary>
 /// <returns></returns>
 Task<byte[]> RandomBackground();
 /// <summary>
 /// 随机获取模板
 /// </summary>
 /// <param name="type">模板类型，滑动、旋转、点选</param>
 /// <returns></returns>
 Task<(byte[], byte[])> RandomTemplate(string type);
 }
}

IResourceProvider.cs

IResourceProvider.cs用于提供验证码背景图片与模板图片的List

using SlideCaptcha.Model;
using System.Collections.Generic;
namespace SlideCaptcha.Interface
{
 public interface IResourceProvider
 {
 /// <summary>
 /// 提供验证码背景图片
 /// </summary>
 /// <returns></returns>
 List<Resource> Backgrounds();
 /// <summary>
 /// 提供模板资源
 /// </summary>
 /// <returns></returns>
 List<TemplatePair> Templates();
 }
}

ISliderCaptchaImageGenerator.cs

ISliderCaptchaImageGenerator.cs用于生成滑动验证码

using SlideCaptcha.Model;
using System.Threading.Tasks;
namespace SlideCaptcha.Interface
{
 public interface ISliderCaptchaImageGenerator
 {
 /// <summary>
 /// 生成滑动验证码
 /// </summary>
 /// <param name="captchaId">验证码ID</param>
 /// <returns></returns>
 Task<SliderImageCaptchaInfo> Generate(string captchaId);
 }
}

IStorage.cs

IStorage.cs 用于缓存的操作

using System;
namespace SlideCaptcha.Interface
{
 public interface IStorage
 {
 /// <summary>
 /// 设置缓存
 /// </summary>
 /// <typeparam name="T"></typeparam>
 /// <param name="key"></param>
 /// <param name="value"></param>
 /// <param name="absoluteExpiration"></param>
 void Set<T>(string key, T value, DateTimeOffset absoluteExpiration);
 /// <summary>
 /// 获取缓存
 /// </summary>
 /// <typeparam name="T"></typeparam>
 /// <param name="key"></param>
 /// <returns></returns>
 T Get<T>(string key);
 /// <summary>
 /// 删除缓存
 /// </summary>
 /// <param name="key"></param>
 void Remove(string key);
 }
}

IValidator.cs

IValidator.cs 用于提供校验验证码数据。

using SlideCaptcha.Model;
namespace SlideCaptcha.Interface
{
 public interface IValidator
 {
 /// <summary>
 /// 校验验证码数据
 /// </summary>
 /// <param name="slideTrack">滑动</param>
 /// <param name="captchaValidateData">校验</param>
 /// <returns></returns>
 bool Validate(SlideTrack slideTrack, CaptchaValidateData captchaValidateData);
 }
}

下载地址（包括验证码源码、服务端API示例、前端代码有HTML+JQyeryt、vue3两个示例）

https://pan.baidu.com/s/19mx24FXrnqz9u2mmFqlr6g?pwd=7636