图形验证码

asg_form/Controllers/login.cs

@@ -216,9 +216,76 @@ namespace asg_form.Controllers
             }
 
         }
+        public readonly CaptchaService _captchaService = new CaptchaService();
+
+        /// <summary>
+        /// 验证码注册
+        /// </summary>
+        [Route("api/v2/enroll")]
+        [HttpPost]
+        [Authorize]
+        public async Task<ActionResult<newuser_get>> enroll([FromBody] AddUserReq newuser)
+        {
+            int wp = -1;
+
+            try
+            {
+                var maxId = await userManager.Users.MaxAsync(u => u.Id);
+                wp = 0;
+
+                // 创建验证码服务实例
+                var captchaService = new CaptchaService();
+
+                // 验证验证码的逻辑
+                bool isCaptchaValid = captchaService.ValidateCaptcha(newuser.captcha); // 使用之前的验证码服务
+                if (!isCaptchaValid)
+                {
+                    return BadRequest(new error_mb { code = 400, message = "验证码无效" });
+                }
+
+                User? user = await this.userManager.FindByNameAsync(newuser.userName);
+                if (user == null)
+                {
+                    wp = 1;
+                    user = new User
+                    {
+                        Id = maxId + 1,
+                        UserName = newuser.userName,
+                        chinaname = newuser.chinaname,
+                        EmailConfirmed = true,
+                        Integral = 0
+                    };
+                    wp = 3;
+
+                    var r = await userManager.CreateAsync(user, newuser.password);
+                    wp = 4;
+                    if (!r.Succeeded)
+                    {
+                        return BadRequest(new error_mb
+                        {
+                            code = 400,
+                            message = string.Join(", ", r.Errors.Select(e => e.Description))
+                        });
+                    }
+
+                    return Ok(new { code = 200, message = "注册成功！" });
+                }
+                else
+                {
+                    return BadRequest(new error_mb { code = 400, message = "邮箱已被注册" });
+                }
+            }
+            catch (Exception ex)
+            {
+                var innerException = ex.InnerException != null ? ex.InnerException.Message : ex.Message;
+                return Ok(new { code = 500, message = "服务器错误", details = innerException, wp });
+            }
+        }
+
 
         public record Adduserreq(string userName, string password, string chinaname, string token);
 
+        public record AddUserReq(string userName, string password, string chinaname, string captcha);
 
         [Route("api/v1/setimg")]
         [HttpPost]

asg_form/Controllers/prerfunctions/Draw.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.IO;
+
+public class CaptchaService
+{
+    private string generatedCaptchaCode;
+
+    // 生成验证码图像并返回Base64字符串
+    public (string captchaImage, string captchaCode) GenerateCaptcha()
+    {
+        generatedCaptchaCode = GenerateRandomCode(5); // 生成5位随机字符
+        Bitmap bitmap = new Bitmap(100, 40);
+
+        using (Graphics g = Graphics.FromImage(bitmap))
+        {
+            g.Clear(Color.White);
+            using (Font font = new Font("Arial", 20))
+            {
+                g.DrawString(generatedCaptchaCode, font, Brushes.Black, 10, 10);
+            }
+        }
+
+        using (MemoryStream ms = new MemoryStream())
+        {
+            bitmap.Save(ms, ImageFormat.Png);
+            string base64Image = Convert.ToBase64String(ms.ToArray());
+            return (base64Image, generatedCaptchaCode);
+        }
+    }
+
+    // 验证用户输入的验证码
+    public bool ValidateCaptcha(string userInput)
+    {
+        return userInput.Equals(generatedCaptchaCode, StringComparison.OrdinalIgnoreCase);
+    }
+
+    // 生成随机字符
+    private string GenerateRandomCode(int length)
+    {
+        const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+        Random random = new Random();
+        return new string(Enumerable.Repeat(chars, length)
+            .Select(s => s[random.Next(s.Length)]).ToArray());
+    }
+}