init commit

20220330_Vote/Ewide.Core/Captcha/General/GeneralCaptcha.cs

@@ -0,0 +1,130 @@
+using Furion.DependencyInjection;
+using Microsoft.Extensions.Caching.Memory;
+using System;
+using System.ComponentModel.DataAnnotations;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.IO;
+using System.Text;
+
+namespace Ewide.Core
+{
+    /// <summary>
+    /// 常规验证码
+    /// </summary>
+    public class GeneralCaptcha : IGeneralCaptcha, ITransient 
+    {
+        private readonly IMemoryCache _memoryCache;
+
+        public GeneralCaptcha(IMemoryCache memoryCache)
+        {
+            _memoryCache = memoryCache;
+        }
+
+        /// <summary>
+        /// 生成验证码图片
+        /// </summary>
+        /// <param name="length"></param>
+        /// <returns></returns>
+        public string CreateCaptchaImage(int length = 4)
+        {
+            return Convert.ToBase64String(Draw(length));
+        }
+
+        private string GenerateRandom(int length)
+        {
+            var chars = new StringBuilder();
+            // 验证码的字符集，去掉了一些容易混淆的字符 
+            char[] character = { '2', '3', '4', '5', '6', '8', '9', 'a', 'b', 'd', 'e', 'f', 'h', 'k', 'm', 'n', 'r', 'x', 'y', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'R', 'S', 'T', 'W', 'X', 'Y' };
+            Random rnd = new Random();
+            // 生成验证码字符串 
+            for (int i = 0; i < length; i++)
+            {
+                chars.Append(character[rnd.Next(character.Length)]);
+            }
+            return chars.ToString();
+        }
+
+        private byte[] Draw(int length = 4)
+        {
+            int codeW = 110;
+            int codeH = 36;
+            int fontSize = 22;
+
+            // 颜色列表，用于验证码、噪线、噪点 
+            Color[] color = { Color.Black, Color.Red, Color.Blue, Color.Green, Color.Orange, Color.Brown, Color.Brown, Color.DarkBlue };
+            // 字体列表，用于验证码 
+            string[] fonts = new[] { "Times New Roman", "Verdana", "Arial", "Gungsuh", "Impact" };
+
+            var code = GenerateRandom(length); // 随机字符串集合
+
+            using (Bitmap bmp = new Bitmap(codeW, codeH))
+            using (Graphics g = Graphics.FromImage(bmp))
+            using (MemoryStream ms = new MemoryStream())
+            {
+                g.Clear(Color.White);
+                Random rnd = new Random();
+                // 画噪线 
+                for (int i = 0; i < 1; i++)
+                {
+                    int x1 = rnd.Next(codeW);
+                    int y1 = rnd.Next(codeH);
+                    int x2 = rnd.Next(codeW);
+                    int y2 = rnd.Next(codeH);
+                    var clr = color[rnd.Next(color.Length)];
+                    g.DrawLine(new Pen(clr), x1, y1, x2, y2);
+                }
+
+                // 画验证码字符串                 
+                string fnt;
+                Font ft;
+                for (int i = 0; i < code.Length; i++)
+                {
+                    fnt = fonts[rnd.Next(fonts.Length)];
+                    ft = new Font(fnt, fontSize);
+                    var clr = color[rnd.Next(color.Length)];
+                    g.DrawString(code[i].ToString(), ft, new SolidBrush(clr), (float)i * 24 + 2, (float)0);
+                }
+
+                // 缓存验证码正确集合
+                var cacheOptions = new MemoryCacheEntryOptions().SetSlidingExpiration(TimeSpan.FromSeconds(30));
+                _memoryCache.Set(CommonConst.CACHE_KEY_CODE + Guid.NewGuid().ToString(), code, cacheOptions);
+
+                // 将验证码图片写入内存流
+                bmp.Save(ms, ImageFormat.Png);
+                return ms.ToArray();
+            }
+        }
+
+        /// <summary>
+        /// 验证码验证
+        /// </summary>
+        /// <param name="input"></param>
+        /// <returns></returns>
+        public dynamic CheckCode(GeneralCaptchaInput input)
+        {
+            var res = new ClickWordCaptchaResult();
+
+            var code = _memoryCache.Get(CommonConst.CACHE_KEY_CODE + input.Token);
+            if (code == null)
+            {
+                res.repCode = "6110";
+                res.repMsg = "验证码已失效，请重新获取";
+                return res;
+            }
+            if (input.CaptchaCode != (string)code)
+            {
+                res.repCode = "6112";
+                res.repMsg = "验证码错误";
+                return res;
+            }
+
+            _memoryCache.Remove(CommonConst.CACHE_KEY_CODE + input.Token);
+            res.repCode = "0000";
+            res.repMsg = "验证成功";
+            return res;
+        }
+    }
+
+
+}

20220330_Vote/Ewide.Core/Captcha/General/GeneralCaptchaInput.cs

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+using Furion.DependencyInjection;
+using System.ComponentModel.DataAnnotations;
+
+namespace Ewide.Core
+{
+    /// <summary>
+    /// 常规验证码输入
+    /// </summary>
+    [SuppressSniffer]
+    public class GeneralCaptchaInput
+    {
+        /// <summary>
+        /// 验证码类型
+        /// </summary>
+        [Required(ErrorMessage = "验证码类型")]
+        public string CaptchaType { get; set; }
+
+        /// <summary>
+        /// 验证码字符
+        /// </summary>
+        [Required(ErrorMessage = "验证码字符不能为空")]
+        public string CaptchaCode { get; set; }
+
+        /// <summary>
+        /// Token
+        /// </summary>
+        public string Token { get; set; }
+    }
+}

20220330_Vote/Ewide.Core/Captcha/General/IGeneralCaptcha.cs

@@ -0,0 +1,8 @@
+namespace Ewide.Core
+{
+    public interface IGeneralCaptcha
+    {
+        dynamic CheckCode(GeneralCaptchaInput input);
+        string CreateCaptchaImage(int length = 4);
+    }
+}