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.NET?6實(shí)現(xiàn)滑動(dòng)驗(yàn)證碼的示例詳解

 更新時(shí)間：2022年11月28日 16:39:04   作者：傾斜的水瓶座  
這篇文章主要為大家詳細(xì)介紹了如何利用.NET?6實(shí)現(xiàn)滑動(dòng)驗(yàn)證碼，文中的示例代碼講解詳細(xì)，具有一定的借鑒價(jià)值，感興趣的小伙伴可以了解一下

本節(jié)創(chuàng)建的類全部在工程的Model目錄下：

CaptchaData.cs

CaptchaData.cs：驗(yàn)證碼的數(shù)據(jù)類實(shí)體

namespace SlideCaptcha.Model
{
    public class CaptchaData
    {
        /// <summary>
        /// id
        /// </summary>
        public string Id { get; set; }
        /// <summary>
        /// 背景圖(含凹槽)
        /// </summary>
        public string BackgroundImage { get; set; }
        /// <summary>
        /// 滑動(dòng)塊圖
        /// </summary>
        public string SliderImage { get; set; }

        public CaptchaData(string id, string backgroundImage, string sliderImage)
        {
            Id = id;
            BackgroundImage = backgroundImage;
            SliderImage = sliderImage;
        }
    }
}

id表示驗(yàn)證碼的id值，用于校驗(yàn)驗(yàn)證碼，BackgroundImage 是驗(yàn)證碼圖片base64，包含了凹槽。凹槽模板在templates目錄下。SliderImage 是滑塊圖片。模板在templates下。

CaptchaValidateData.cs

CaptchaValidateData.cs：驗(yàn)證碼驗(yàn)證數(shù)據(jù)實(shí)體

namespace SlideCaptcha.Model
{
    public class CaptchaValidateData
    {
        /// <summary>
        /// 滑動(dòng)比例
        /// </summary>
        public float Percent { get; set; }

        /// <summary>
        /// 容錯(cuò)值(校驗(yàn)時(shí)用，缺口位置與實(shí)際滑動(dòng)位置匹配容錯(cuò)范圍)
        /// </summary>
        public float Tolerant { get; set; }

        public CaptchaValidateData(float percent, float tolerant)
        {
            Percent = percent;
            Tolerant = tolerant;
        }
    }
}

ImageCaptchaInfo.cs

ImageCaptchaInfo.cs：證碼圖片信息實(shí)體

namespace SlideCaptcha.Model
{
    public class ImageCaptchaInfo
    {
        /// <summary>
        /// 背景圖寬
        /// </summary>
        public int BackgroundImageWidth { get; set; }
        /// <summary>
        /// 背景圖高
        /// </summary>
        public int BackgroundImageHeight { get; set; }
        /// <summary>
        /// 背景圖
        /// </summary>
        public string BackgroundImageBase64 { get; set; }
        /// <summary>
        /// 滑動(dòng)塊圖寬
        /// </summary>
        public int SliderImageWidth { get; set; }
        /// <summary>
        /// 滑動(dòng)塊圖高
        /// </summary>
        public int SliderImageHeight { get; set; }
        /// <summary>
        /// 滑動(dòng)塊圖
        /// </summary>
        public string SliderImageBase64 { get; set; }
    }
}

驗(yàn)證碼實(shí)體類的基類，滑動(dòng)驗(yàn)證碼、旋轉(zhuǎn)驗(yàn)證碼、點(diǎn)選驗(yàn)證碼、拼接驗(yàn)證碼都基于這個(gè)類。

Resource.cs

Resource.cs ：資源實(shí)體類

namespace SlideCaptcha.Model
{
    public class Resource
    {
        public Resource(){}
        /// <summary>
        /// 資源數(shù)據(jù)
        /// </summary>
        public string Data { get; set; }

        /// <summary>
        /// 資源類型
        /// </summary>
        public string Type { get; set; }

        
        /// <summary>
        /// 構(gòu)造函數(shù)
        /// </summary>
        /// <param name="type">資源類型</param>
        /// <param name="data">資源數(shù)據(jù)</param>
        public Resource(string type,string data)
        {
            Type = type;
            Data = data;
        }
    }
}

資源數(shù)據(jù)，Data為要生成驗(yàn)證碼圖片路徑。Type為類型，目前僅為本地文件，后期將擴(kuò)展URL模式。

SliderImageCaptchaInfo.cs

SliderImageCaptchaInfo.cs：滑動(dòng)驗(yàn)證碼實(shí)體類

using SlideCaptcha.Exceptions;

namespace SlideCaptcha.Model
{
    public class SliderImageCaptchaInfo : ImageCaptchaInfo
    {
        /// <summary>
        /// 凹槽x坐標(biāo)
        /// </summary>
        public int X { get; set; }
        /// <summary>
        /// 凹槽y坐標(biāo)
        /// </summary>
        public int Y { get; set; }
        /// <summary>
        /// 凹槽位置百分比
        /// </summary>
        public float Percent
        {
            get
            {
                if (BackgroundImageWidth <= 0) return 0;
                return 1.0f * X / BackgroundImageWidth;
            }
        }

        public void Check()
        {
            // 校驗(yàn)
            if (this.X <= 0) throw new SlideCaptchaException($"SliderImageCaptchaInfo數(shù)據(jù)異常: {nameof(X)}小于等于0");
            if (this.Y <= 0) throw new SlideCaptchaException($"SliderImageCaptchaInfo數(shù)據(jù)異常: {nameof(Y)}小于等于0");
            if (this.BackgroundImageWidth <= 0) throw new SlideCaptchaException($"SliderImageCaptchaInfo數(shù)據(jù)異常: {nameof(BackgroundImageWidth)}小于等于0");
            if (this.BackgroundImageHeight <= 0) throw new SlideCaptchaException($"SliderImageCaptchaInfo數(shù)據(jù)異常: {nameof(BackgroundImageHeight)}小于等于0");
            if (this.SliderImageWidth <= 0) throw new SlideCaptchaException($"SliderImageCaptchaInfo數(shù)據(jù)異常: {nameof(SliderImageWidth)}小于等于0");
            if (this.SliderImageHeight <= 0) throw new SlideCaptchaException($"SliderImageCaptchaInfo數(shù)據(jù)異常: {nameof(SliderImageHeight)}小于等于0");
            if (string.IsNullOrWhiteSpace(this.BackgroundImageBase64)) throw new SlideCaptchaException($"SliderImageCaptchaInfo數(shù)據(jù)異常: {nameof(BackgroundImageBase64)}為空");
            if (string.IsNullOrWhiteSpace(this.SliderImageBase64)) throw new SlideCaptchaException($"SliderImageCaptchaInfo數(shù)據(jù)異常: {nameof(SliderImageBase64)}為空");
        }
    }
}

SlideTrack.cs

·SlideTrack.cs：滑動(dòng)軌跡·

using SlideCaptcha.Exceptions;
using System;
using System.Collections.Generic;

namespace SlideCaptcha.Model
{
    /// <summary>
    /// 滑動(dòng)軌跡
    /// </summary>
    public class SlideTrack
    {
        /// <summary>
        /// 背景圖片寬度(可能經(jīng)過縮放，不是原始圖片寬高)
        /// </summary>
        public int BackgroundImageWidth { get; set; }
        /// <summary>
        /// 背景圖片高度(可能經(jīng)過縮放，不是原始圖片寬高)
        /// </summary>
        public int BackgroundImageHeight { get; set; }
        /// <summary>
        /// 滑塊圖片寬度(可能經(jīng)過縮放，不是原始圖片寬高)
        /// </summary>
        public int SliderImageWidth { get; set; }
        /// <summary>
        /// 滑塊圖片高度(可能經(jīng)過縮放，不是原始圖片寬高)
        /// </summary>
        public int SliderImageHeight { get; set; }
        /// <summary>
        /// 滑動(dòng)開始時(shí)間(可能經(jīng)過縮放，不是原始圖片寬高)
        /// </summary>
        public DateTime StartTime { get; set; }
        /// <summary>
        /// 滑動(dòng)結(jié)束時(shí)間
        /// </summary>
        public DateTime EndTime { get; set; }
        /// <summary>
        /// 軌跡
        /// </summary>
        public List<Track> Tracks { get; set; }

        /// <summary>
        /// 滑動(dòng)比例
        /// </summary>
        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()
        {
            // 校驗(yàn)
            if (this.BackgroundImageWidth <= 0) throw new SlideCaptchaException($"SlideTrack數(shù)據(jù)異常: {nameof(BackgroundImageWidth)}小于等于0");
            if (this.BackgroundImageHeight <= 0) throw new SlideCaptchaException($"SlideTrack數(shù)據(jù)異常: {nameof(BackgroundImageHeight)}小于等于0");
            if (this.SliderImageWidth <= 0) throw new SlideCaptchaException($"SlideTrack數(shù)據(jù)異常: {nameof(SliderImageWidth)}小于等于0");
            if (this.SliderImageHeight <= 0) throw new SlideCaptchaException($"SlideTrack數(shù)據(jù)異常: {nameof(SliderImageHeight)}小于等于0");
            if (this.StartTime == DateTime.MinValue) throw new SlideCaptchaException($"SlideTrack數(shù)據(jù)異常: {nameof(StartTime)}為空");
            if (this.EndTime == DateTime.MinValue) throw new SlideCaptchaException($"SlideTrack數(shù)據(jù)異常: {nameof(EndTime)}為空");
        }

        public void CheckTracks()
        {
            if (this.Tracks == null || this.Tracks.Count == 0) throw new SlideCaptchaException($"SlideTrack數(shù)據(jù)異常: {nameof(Tracks)}為空");
        }
    }
}

TemplatePair.cs

·TemplatePair.cs：模板類·


namespace SlideCaptcha.Model
{
    public class TemplatePair
    {

        public TemplatePair() { }

        /// <summary>
        /// 滑塊資源
        /// </summary>
        public Resource Slider { get; set; }

        /// <summary>
        /// 凹槽資源
        /// </summary>

        public Resource Notch { get; set; }

        /// <summary>
        /// 模板類型
        /// </summary>
        public string TYPE { get; set; }

        /// <summary>
        /// 構(gòu)造函數(shù)
        /// </summary>
        /// <param name="slider">滑塊資源</param>
        /// <param name="notch">凹槽資源</param>
        /// <param name="type">末班類型</param>
        public TemplatePair(Resource slider, Resource notch,string type)
        {
            Slider = slider;
            Notch = notch;
            TYPE = type;
        }
        /// <summary>
        /// 創(chuàng)建模板
        /// </summary>
        /// <param name="slider">滑塊資源</param>
        /// <param name="notch">凹槽資源</param>
        /// <returns></returns>
        public static TemplatePair Create(Resource slider, Resource notch,string type)
        {
            return new TemplatePair(slider, notch,type);
        }
        
    }
}

Track.cs

Track.cs ：滑動(dòng)數(shù)據(jù)實(shí)體類

namespace SlideCaptcha.Model
{
    public class Track
    {
        /// <summary>
        /// X軸
        /// </summary>
        public int X { get; set; }

        /// <summary>
        /// Y軸
        /// </summary>
        public int Y { get; set; }

        /// <summary>
        /// 時(shí)間
        /// </summary>
        public int T { get; set; }
    }
}

代碼中SlideCaptchaException是自定義錯(cuò)誤類。自定義錯(cuò)誤類在Extensions文件夾下，這個(gè)后面的代碼會(huì)進(jìn)行說明。

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