.NET 6实现滑动验证码的示例详解

namespace SlideCaptcha.Model { public class CaptchaData { /// 
 /// id /// 
 public string Id { get; set; } /// 
 /// 背景图(含凹槽) /// 
 public string BackgroundImage { get; set; } /// 
 /// 滑动块图 /// 
 public string SliderImage { get; set; } public CaptchaData(string id, string backgroundImage, string sliderImage) { Id = id; BackgroundImage = backgroundImage; SliderImage = sliderImage; } } } 

namespace SlideCaptcha.Model { public class CaptchaValidateData { /// 
 /// 滑动比例 /// 
 public float Percent { get; set; } /// 
 /// 容错值(校验时用，缺口位置与实际滑动位置匹配容错范围) /// 
 public float Tolerant { get; set; } public CaptchaValidateData(float percent, float tolerant) { Percent = percent; Tolerant = tolerant; } } }

namespace SlideCaptcha.Model { public class ImageCaptchaInfo { /// 
 /// 背景图宽 /// 
 public int BackgroundImageWidth { get; set; } /// 
 /// 背景图高 /// 
 public int BackgroundImageHeight { get; set; } /// 
 /// 背景图 /// 
 public string BackgroundImageBase64 { get; set; } /// 
 /// 滑动块图宽 /// 
 public int SliderImageWidth { get; set; } /// 
 /// 滑动块图高 /// 
 public int SliderImageHeight { get; set; } /// 
 /// 滑动块图 /// 
 public string SliderImageBase64 { get; set; } } }

namespace SlideCaptcha.Model { public class Resource { public Resource(){} /// 
 /// 资源数据 /// 
 public string Data { get; set; } /// 
 /// 资源类型 /// 
 public string Type { get; set; } /// 
 /// 构造函数 /// 
 /// 资源类型 /// 资源数据 public Resource(string type,string data) { Type = type; Data = data; } } }

using SlideCaptcha.Exceptions; namespace SlideCaptcha.Model { public class SliderImageCaptchaInfo : ImageCaptchaInfo { /// 
 /// 凹槽x坐标 /// 
 public int X { get; set; } /// 
 /// 凹槽y坐标 /// 
 public int Y { get; set; } /// 
 /// 凹槽位置百分比 /// 
 public float Percent { get { if (BackgroundImageWidth <= 0) return 0; return 1.0f * X / BackgroundImageWidth; } } public void Check() { // 校验 if (this.X <= 0) throw new SlideCaptchaException($"SliderImageCaptchaInfo数据异常: {nameof(X)}小于等于0"); if (this.Y <= 0) throw new SlideCaptchaException($"SliderImageCaptchaInfo数据异常: {nameof(Y)}小于等于0"); if (this.BackgroundImageWidth <= 0) throw new SlideCaptchaException($"SliderImageCaptchaInfo数据异常: {nameof(BackgroundImageWidth)}小于等于0"); if (this.BackgroundImageHeight <= 0) throw new SlideCaptchaException($"SliderImageCaptchaInfo数据异常: {nameof(BackgroundImageHeight)}小于等于0"); if (this.SliderImageWidth <= 0) throw new SlideCaptchaException($"SliderImageCaptchaInfo数据异常: {nameof(SliderImageWidth)}小于等于0"); if (this.SliderImageHeight <= 0) throw new SlideCaptchaException($"SliderImageCaptchaInfo数据异常: {nameof(SliderImageHeight)}小于等于0"); if (string.IsNullOrWhiteSpace(this.BackgroundImageBase64)) throw new SlideCaptchaException($"SliderImageCaptchaInfo数据异常: {nameof(BackgroundImageBase64)}为空"); if (string.IsNullOrWhiteSpace(this.SliderImageBase64)) throw new SlideCaptchaException($"SliderImageCaptchaInfo数据异常: {nameof(SliderImageBase64)}为空"); } } }

using SlideCaptcha.Exceptions; using System; using System.Collections.Generic; namespace SlideCaptcha.Model { /// 
 /// 滑动轨迹 /// 
 public class SlideTrack { /// 
 /// 背景图片宽度(可能经过缩放，不是原始图片宽高) /// 
 public int BackgroundImageWidth { get; set; } /// 
 /// 背景图片高度(可能经过缩放，不是原始图片宽高) /// 
 public int BackgroundImageHeight { get; set; } /// 
 /// 滑块图片宽度(可能经过缩放，不是原始图片宽高) /// 
 public int SliderImageWidth { get; set; } /// 
 /// 滑块图片高度(可能经过缩放，不是原始图片宽高) /// 
 public int SliderImageHeight { get; set; } /// 
 /// 滑动开始时间(可能经过缩放，不是原始图片宽高) /// 
 public DateTime StartTime { get; set; } /// 
 /// 滑动结束时间 /// 
 public DateTime EndTime { get; set; } /// 
 /// 轨迹 /// 
 public List Tracks { get; set; } /// 
 /// 滑动比例 /// 
 public float Percent { get { if (this.BackgroundImageWidth <= 0) return -1; if (this.Tracks.Count <= 0) return -1; var lastTrack = this.Tracks[this.Tracks.Count - 1]; return 1.0f * lastTrack.X / this.BackgroundImageWidth; } } public void Check() { // 校验 if (this.BackgroundImageWidth <= 0) throw new SlideCaptchaException($"SlideTrack数据异常: {nameof(BackgroundImageWidth)}小于等于0"); if (this.BackgroundImageHeight <= 0) throw new SlideCaptchaException($"SlideTrack数据异常: {nameof(BackgroundImageHeight)}小于等于0"); if (this.SliderImageWidth <= 0) throw new SlideCaptchaException($"SlideTrack数据异常: {nameof(SliderImageWidth)}小于等于0"); if (this.SliderImageHeight <= 0) throw new SlideCaptchaException($"SlideTrack数据异常: {nameof(SliderImageHeight)}小于等于0"); if (this.StartTime == DateTime.MinValue) throw new SlideCaptchaException($"SlideTrack数据异常: {nameof(StartTime)}为空"); if (this.EndTime == DateTime.MinValue) throw new SlideCaptchaException($"SlideTrack数据异常: {nameof(EndTime)}为空"); } public void CheckTracks() { if (this.Tracks == null || this.Tracks.Count == 0) throw new SlideCaptchaException($"SlideTrack数据异常: {nameof(Tracks)}为空"); } } }

 namespace SlideCaptcha.Model { public class TemplatePair { public TemplatePair() { } /// 
 /// 滑块资源 /// 
 public Resource Slider { get; set; } /// 
 /// 凹槽资源 /// 
 public Resource Notch { get; set; } /// 
 /// 模板类型 /// 
 public string TYPE { get; set; } /// 
 /// 构造函数 /// 
 /// 滑块资源 /// 凹槽资源 /// 末班类型 public TemplatePair(Resource slider, Resource notch,string type) { Slider = slider; Notch = notch; TYPE = type; } /// 
 /// 创建模板 /// 
 /// 滑块资源 /// 凹槽资源 ///  public static TemplatePair Create(Resource slider, Resource notch,string type) { return new TemplatePair(slider, notch,type); } } }

namespace SlideCaptcha.Model { public class Track { /// 
 /// X轴 /// 
 public int X { get; set; } /// 
 /// Y轴 /// 
 public int Y { get; set; } /// 
 /// 时间 /// 
 public int T { get; set; } } }