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@@ -12,266 +12,265 @@ using SixLabors.ImageSharp.PixelFormats;
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using ZhonTai.Admin.Core.Attributes;
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using ZhonTai.Admin.Tools.Cache;
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-namespace ZhonTai.Admin.Tools.Captcha
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+namespace ZhonTai.Admin.Tools.Captcha;
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+
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+/// <summary>
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+/// 滑块拼图验证
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+/// </summary>
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+[SingleInstance]
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+public class SlideJigsawCaptchaTool : ICaptchaTool
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{
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+ private readonly ICacheTool _cache;
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+
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+ private readonly Random _random = new();
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+
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+ public SlideJigsawCaptchaTool(ICacheTool cache)
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+ {
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+ _cache = cache;
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+ }
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+
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/// <summary>
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- /// 滑块拼图验证
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+ /// 随机范围内数字
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/// </summary>
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- [SingleInstance]
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- public class SlideJigsawCaptchaTool : ICaptchaTool
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+ /// <param name="startNum"></param>
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+ /// <param name="endNum"></param>
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+ /// <returns></returns>
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+ private int GetRandomInt(int startNum, int endNum)
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{
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- private readonly ICacheTool _cache;
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-
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- private readonly Random _random = new();
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+ return (endNum > startNum ? _random.Next(endNum - startNum) : 0) + startNum;
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+ }
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- public SlideJigsawCaptchaTool(ICacheTool cache)
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+ /// <summary>
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+ /// 随机生成拼图坐标
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+ /// </summary>
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+ /// <param name="originalWidth"></param>
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+ /// <param name="originalHeight"></param>
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+ /// <param name="templateWidth"></param>
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+ /// <param name="templateHeight"></param>
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+ /// <returns></returns>
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+ private PointModel GeneratePoint(int originalWidth, int originalHeight, int templateWidth, int templateHeight)
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+ {
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+ int widthDifference = originalWidth - templateWidth;
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+ int heightDifference = originalHeight - templateHeight;
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+ int x;
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+ if (widthDifference <= 0)
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{
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- _cache = cache;
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+ x = 5;
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}
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-
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- /// <summary>
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- /// 随机范围内数字
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- /// </summary>
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- /// <param name="startNum"></param>
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- /// <param name="endNum"></param>
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- /// <returns></returns>
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- private int GetRandomInt(int startNum, int endNum)
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+ else
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{
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- return (endNum > startNum ? _random.Next(endNum - startNum) : 0) + startNum;
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+ x = _random.Next(originalWidth - templateWidth - 100) + 100;
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}
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- /// <summary>
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- /// 随机生成拼图坐标
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- /// </summary>
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- /// <param name="originalWidth"></param>
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- /// <param name="originalHeight"></param>
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- /// <param name="templateWidth"></param>
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- /// <param name="templateHeight"></param>
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- /// <returns></returns>
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- private PointModel GeneratePoint(int originalWidth, int originalHeight, int templateWidth, int templateHeight)
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+ int y;
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+ if (heightDifference <= 0)
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{
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- int widthDifference = originalWidth - templateWidth;
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- int heightDifference = originalHeight - templateHeight;
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- int x;
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- if (widthDifference <= 0)
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- {
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- x = 5;
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- }
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- else
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- {
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- x = _random.Next(originalWidth - templateWidth - 100) + 100;
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- }
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+ y = 5;
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+ }
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+ else
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+ {
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+ y = _random.Next(originalHeight - templateHeight - 5) + 5;
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+ }
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- int y;
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- if (heightDifference <= 0)
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- {
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- y = 5;
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- }
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- else
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- {
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- y = _random.Next(originalHeight - templateHeight - 5) + 5;
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- }
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+ return new PointModel(x, y);
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+ }
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- return new PointModel(x, y);
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+ /// <summary>
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+ /// 随机生成干扰图坐标
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+ /// </summary>
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+ /// <param name="originalWidth"></param>
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+ /// <param name="originalHeight"></param>
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+ /// <param name="templateWidth"></param>
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+ /// <param name="templateHeight"></param>
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+ /// <param name="blockX"></param>
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+ /// <param name="blockY"></param>
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+ /// <returns></returns>
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+ private PointModel GenerateInterferencePoint(int originalWidth, int originalHeight, int templateWidth, int templateHeight, int blockX, int blockY)
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+ {
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+ int x;
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+ if (originalWidth - blockX - 5 > templateWidth * 2)
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+ {
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+ //在原扣图右边插入干扰图
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+ x = GetRandomInt(blockX + templateWidth + 5, originalWidth - templateWidth);
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}
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-
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- /// <summary>
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- /// 随机生成干扰图坐标
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- /// </summary>
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- /// <param name="originalWidth"></param>
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- /// <param name="originalHeight"></param>
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- /// <param name="templateWidth"></param>
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- /// <param name="templateHeight"></param>
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- /// <param name="blockX"></param>
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- /// <param name="blockY"></param>
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- /// <returns></returns>
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- private PointModel GenerateInterferencePoint(int originalWidth, int originalHeight, int templateWidth, int templateHeight, int blockX, int blockY)
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+ else
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{
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- int x;
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- if (originalWidth - blockX - 5 > templateWidth * 2)
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- {
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- //在原扣图右边插入干扰图
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- x = GetRandomInt(blockX + templateWidth + 5, originalWidth - templateWidth);
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- }
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- else
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- {
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- //在原扣图左边插入干扰图
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- x = GetRandomInt(100, blockX - templateWidth - 5);
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- }
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-
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- int y;
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- if (originalHeight - blockY - 5 > templateHeight * 2)
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- {
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- //在原扣图下边插入干扰图
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- y = GetRandomInt(blockY + templateHeight + 5, originalHeight - templateHeight);
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- }
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- else
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- {
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- //在原扣图上边插入干扰图
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- y = GetRandomInt(5, blockY - templateHeight - 5);
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- }
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+ //在原扣图左边插入干扰图
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+ x = GetRandomInt(100, blockX - templateWidth - 5);
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+ }
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- return new PointModel(x, y);
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+ int y;
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+ if (originalHeight - blockY - 5 > templateHeight * 2)
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+ {
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+ //在原扣图下边插入干扰图
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+ y = GetRandomInt(blockY + templateHeight + 5, originalHeight - templateHeight);
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+ }
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+ else
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+ {
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+ //在原扣图上边插入干扰图
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+ y = GetRandomInt(5, blockY - templateHeight - 5);
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}
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- private static ComplexPolygon CalcBlockShape(Image<Rgba32> templateDarkImage)
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+ return new PointModel(x, y);
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+ }
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+
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+ private static ComplexPolygon CalcBlockShape(Image<Rgba32> templateDarkImage)
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+ {
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+ int temp = 0;
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+ var pathList = new List<IPath>();
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+ templateDarkImage.ProcessPixelRows(accessor =>
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{
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- int temp = 0;
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- var pathList = new List<IPath>();
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- templateDarkImage.ProcessPixelRows(accessor =>
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+ for (int y = 0; y < templateDarkImage.Height; y++)
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{
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- for (int y = 0; y < templateDarkImage.Height; y++)
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+ var rowSpan = accessor.GetRowSpan(y);
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+ for (int x = 0; x < rowSpan.Length; x++)
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{
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- var rowSpan = accessor.GetRowSpan(y);
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- for (int x = 0; x < rowSpan.Length; x++)
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+ ref Rgba32 pixel = ref rowSpan[x];
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+ if (pixel.A != 0)
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{
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- ref Rgba32 pixel = ref rowSpan[x];
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- if (pixel.A != 0)
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+ if (temp == 0)
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{
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- if (temp == 0)
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- {
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- temp = x;
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- }
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+ temp = x;
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}
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- else
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+ }
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+ else
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+ {
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+ if (temp != 0)
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{
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- if (temp != 0)
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- {
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- pathList.Add(new RectangularPolygon(temp, y, x - temp, 1));
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- temp = 0;
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- }
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+ pathList.Add(new RectangularPolygon(temp, y, x - temp, 1));
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+ temp = 0;
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}
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}
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}
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- });
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+ }
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+ });
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- return new ComplexPolygon(new PathCollection(pathList));
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- }
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+ return new ComplexPolygon(new PathCollection(pathList));
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+ }
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- /// <summary>
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- /// 获得验证数据
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- /// </summary>
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- /// <param name="captchaKey"></param>
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- /// <returns></returns>
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- public async Task<CaptchaOutput> GetAsync(string captchaKey)
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- {
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- //获取网络图片
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- //var client = new HttpClient();
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- //var stream = await client.GetStreamAsync("https://picsum.photos/310/155");
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- //client.Dispose();
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+ /// <summary>
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+ /// 获得验证数据
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+ /// </summary>
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+ /// <param name="captchaKey"></param>
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+ /// <returns></returns>
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+ public async Task<CaptchaOutput> GetAsync(string captchaKey)
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+ {
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+ //获取网络图片
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+ //var client = new HttpClient();
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+ //var stream = await client.GetStreamAsync("https://picsum.photos/310/155");
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+ //client.Dispose();
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- //底图
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- using var baseImage = await Image.LoadAsync<Rgba32>($@"{Directory.GetCurrentDirectory()}\wwwroot\captcha\jigsaw\backgrounds\{_random.Next(1, 6)}.jpg".ToPath());
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- var randomTemplate = _random.Next(1, 7);
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- //深色模板图
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- using var darkTemplateImage = await Image.LoadAsync<Rgba32>($@"{Directory.GetCurrentDirectory()}\wwwroot\captcha\jigsaw\templates\{randomTemplate}\dark.png".ToPath());
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- //透明模板图
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- using var transparentTemplateImage = await Image.LoadAsync<Rgba32>($@"{Directory.GetCurrentDirectory()}\wwwroot\captcha\jigsaw\templates\{randomTemplate}\transparent.png".ToPath());
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+ //底图
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+ using var baseImage = await Image.LoadAsync<Rgba32>($@"{Directory.GetCurrentDirectory()}\wwwroot\captcha\jigsaw\backgrounds\{_random.Next(1, 6)}.jpg".ToPath());
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+ var randomTemplate = _random.Next(1, 7);
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+ //深色模板图
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+ using var darkTemplateImage = await Image.LoadAsync<Rgba32>($@"{Directory.GetCurrentDirectory()}\wwwroot\captcha\jigsaw\templates\{randomTemplate}\dark.png".ToPath());
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+ //透明模板图
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+ using var transparentTemplateImage = await Image.LoadAsync<Rgba32>($@"{Directory.GetCurrentDirectory()}\wwwroot\captcha\jigsaw\templates\{randomTemplate}\transparent.png".ToPath());
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- int baseWidth = baseImage.Width;
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- int baseHeight = baseImage.Height;
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- int blockWidth = 50;
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- int blockHeight = 50;
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+ int baseWidth = baseImage.Width;
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+ int baseHeight = baseImage.Height;
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+ int blockWidth = 50;
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+ int blockHeight = 50;
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- //调整模板图大小
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- darkTemplateImage.Mutate(x =>
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- {
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- x.Resize(blockWidth, blockHeight);
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- });
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- transparentTemplateImage.Mutate(x =>
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- {
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- x.Resize(blockWidth, blockHeight);
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- });
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+ //调整模板图大小
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+ darkTemplateImage.Mutate(x =>
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+ {
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+ x.Resize(blockWidth, blockHeight);
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+ });
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+ transparentTemplateImage.Mutate(x =>
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+ {
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+ x.Resize(blockWidth, blockHeight);
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+ });
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- //新建拼图
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- using var blockImage = new Image<Rgba32>(blockWidth, blockHeight);
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- //新建滑块拼图
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- using var sliderBlockImage = new Image<Rgba32>(blockWidth, baseHeight);
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+ //新建拼图
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+ using var blockImage = new Image<Rgba32>(blockWidth, blockHeight);
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+ //新建滑块拼图
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+ using var sliderBlockImage = new Image<Rgba32>(blockWidth, baseHeight);
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- //随机生成拼图坐标
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- PointModel blockPoint = GeneratePoint(baseWidth, baseHeight, blockWidth, blockHeight);
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+ //随机生成拼图坐标
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+ PointModel blockPoint = GeneratePoint(baseWidth, baseHeight, blockWidth, blockHeight);
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- //根据深色模板图计算轮廓形状
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- var blockShape = CalcBlockShape(darkTemplateImage);
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+ //根据深色模板图计算轮廓形状
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+ var blockShape = CalcBlockShape(darkTemplateImage);
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- //生成拼图
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- blockImage.Mutate(x =>
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- {
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- x.Clip(blockShape, p => p.DrawImage(baseImage, new Point(-blockPoint.X, -blockPoint.Y), 1));
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- });
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- //拼图叠加透明模板图层
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- blockImage.Mutate(x => x.DrawImage(transparentTemplateImage, new Point(0, 0), 1));
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+ //生成拼图
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+ blockImage.Mutate(x =>
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+ {
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+ x.Clip(blockShape, p => p.DrawImage(baseImage, new Point(-blockPoint.X, -blockPoint.Y), 1));
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+ });
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+ //拼图叠加透明模板图层
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+ blockImage.Mutate(x => x.DrawImage(transparentTemplateImage, new Point(0, 0), 1));
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- //生成滑块拼图
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- sliderBlockImage.Mutate(x => x.DrawImage(blockImage, new Point(0, blockPoint.Y), 1));
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+ //生成滑块拼图
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+ sliderBlockImage.Mutate(x => x.DrawImage(blockImage, new Point(0, blockPoint.Y), 1));
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- var opacity = (float)(_random.Next(70, 100) * 0.01);
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- //底图叠加深色模板图
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- baseImage.Mutate(x => x.DrawImage(darkTemplateImage, new Point(blockPoint.X, blockPoint.Y), opacity));
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- //生成干扰图坐标
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- PointModel interferencePoint = GenerateInterferencePoint(baseWidth, baseHeight, blockWidth, blockHeight, blockPoint.X, blockPoint.Y);
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- //底图叠加深色干扰模板图
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- baseImage.Mutate(x => x.DrawImage(darkTemplateImage, new Point(interferencePoint.X, interferencePoint.Y), opacity));
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-
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- var token = Guid.NewGuid().ToString();
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- var captchaData = new CaptchaOutput
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+ var opacity = (float)(_random.Next(70, 100) * 0.01);
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+ //底图叠加深色模板图
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+ baseImage.Mutate(x => x.DrawImage(darkTemplateImage, new Point(blockPoint.X, blockPoint.Y), opacity));
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+ //生成干扰图坐标
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+ PointModel interferencePoint = GenerateInterferencePoint(baseWidth, baseHeight, blockWidth, blockHeight, blockPoint.X, blockPoint.Y);
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+ //底图叠加深色干扰模板图
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+ baseImage.Mutate(x => x.DrawImage(darkTemplateImage, new Point(interferencePoint.X, interferencePoint.Y), opacity));
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+
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+ var token = Guid.NewGuid().ToString();
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+ var captchaData = new CaptchaOutput
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+ {
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+ Token = token,
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+ Data = new SlideJigsawCaptchaDto()
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{
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- Token = token,
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- Data = new SlideJigsawCaptchaDto()
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- {
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- BaseImage = baseImage.ToBase64String(PngFormat.Instance),
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- BlockImage = sliderBlockImage.ToBase64String(PngFormat.Instance)
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- }
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- };
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+ BaseImage = baseImage.ToBase64String(PngFormat.Instance),
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+ BlockImage = sliderBlockImage.ToBase64String(PngFormat.Instance)
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+ }
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+ };
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- var key = string.Format(captchaKey, token);
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- await _cache.SetAsync(key, blockPoint.X);
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+ var key = string.Format(captchaKey, token);
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+ await _cache.SetAsync(key, blockPoint.X);
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|
- return captchaData;
|
|
|
- }
|
|
|
+ return captchaData;
|
|
|
+ }
|
|
|
|
|
|
- /// <summary>
|
|
|
- /// 检查验证数据
|
|
|
- /// </summary>
|
|
|
- /// <param name="input"></param>
|
|
|
- /// <returns></returns>
|
|
|
- public async Task<bool> CheckAsync(CaptchaInput input)
|
|
|
+ /// <summary>
|
|
|
+ /// 检查验证数据
|
|
|
+ /// </summary>
|
|
|
+ /// <param name="input"></param>
|
|
|
+ /// <returns></returns>
|
|
|
+ public async Task<bool> CheckAsync(CaptchaInput input)
|
|
|
+ {
|
|
|
+ if (input == null || input.Data.IsNull())
|
|
|
{
|
|
|
- if (input == null || input.Data.IsNull())
|
|
|
- {
|
|
|
- return false;
|
|
|
- }
|
|
|
- var key = string.Format(input.CaptchaKey, input.Token);
|
|
|
- if (await _cache.ExistsAsync(key))
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+ var key = string.Format(input.CaptchaKey, input.Token);
|
|
|
+ if (await _cache.ExistsAsync(key))
|
|
|
+ {
|
|
|
+ try
|
|
|
{
|
|
|
- try
|
|
|
+ var point = JsonConvert.DeserializeObject<PointModel>(input.Data);
|
|
|
+ var x = await _cache.GetAsync<int>(key);
|
|
|
+ if (Math.Abs(x - point.X) < 5)
|
|
|
{
|
|
|
- var point = JsonConvert.DeserializeObject<PointModel>(input.Data);
|
|
|
- var x = await _cache.GetAsync<int>(key);
|
|
|
- if (Math.Abs(x - point.X) < 5)
|
|
|
- {
|
|
|
- if (input.DeleteCache)
|
|
|
- {
|
|
|
- await _cache.DelAsync(key);
|
|
|
- }
|
|
|
- return true;
|
|
|
- }
|
|
|
- else
|
|
|
+ if (input.DeleteCache)
|
|
|
{
|
|
|
await _cache.DelAsync(key);
|
|
|
- return false;
|
|
|
}
|
|
|
+ return true;
|
|
|
}
|
|
|
- catch
|
|
|
+ else
|
|
|
{
|
|
|
await _cache.DelAsync(key);
|
|
|
return false;
|
|
|
}
|
|
|
}
|
|
|
- else
|
|
|
+ catch
|
|
|
{
|
|
|
+ await _cache.DelAsync(key);
|
|
|
return false;
|
|
|
}
|
|
|
}
|
|
|
+ else
|
|
|
+ {
|
|
|
+ return false;
|
|
|
+ }
|
|
|
}
|
|
|
}
|
zhontai