初始化

2025-11-26 11:18:26 +08:00
commit 0564b8c1f3
579 changed files with 346253 additions and 0 deletions
--- a/WebUI/LIB/BadLink.cs
+++ b/WebUI/LIB/BadLink.cs
@@ -0,0 +1,89 @@
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Http;
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace WebUI.LIB
+{
+    public class BadLink
+    {
+        private readonly RequestDelegate _next;
+        private readonly IWebHostEnvironment _webHostEnvironment;
+
+        public BadLink(RequestDelegate next, IWebHostEnvironment webHostEnvironment)
+        {
+            _webHostEnvironment = webHostEnvironment;
+            _next = next;
+        }
+
+        public async Task Invoke(HttpContext context)
+        {
+            string url = context.Request.Path.Value;
+            if (!url.Contains(".jpg"))
+            {
+                await _next(context);//走正常流程
+                return;
+            }
+            //  访问来源 其他域名等会记录
+            string urlReferrer = context.Request.Headers["Referer"];
+
+            if (string.IsNullOrWhiteSpace(urlReferrer))//直接访问
+            {
+               await _next(context);//走正常流程
+
+                // await this.SetForbiddenImage(context, _webHostEnvironment);//返回404图片
+            }
+            else if (!urlReferrer.Contains("090"))//非当前域名
+            {
+                await this.SetForbiddenImage(context, _webHostEnvironment);//返回404图片
+            }
+            else
+            {
+                await _next(context);//走正常流程
+            }
+        }
+        /// <summary>
+        /// 设置拒绝图片
+        /// </summary>
+        /// <param name="context"></param>
+        /// <param name="webHostEnvironment"></param>
+        /// <returns></returns>
+        private async Task SetForbiddenImage(HttpContext context, IWebHostEnvironment webHostEnvironment)
+        {
+            // 获取访问的图片
+            string defaultImagePath = webHostEnvironment.WebRootPath + context.Request.Path.Value;// "wwwroot/Document/Img/Forbidden.jpg";
+            string path = Path.Combine(Directory.GetCurrentDirectory(), defaultImagePath);
+            // 没有图片
+            if (!File.Exists(path))
+            {
+                await _next(context);//走正常流程
+            }
+            Bitmap bmp = new Bitmap(path);
+
+            Graphics graph = Graphics.FromImage(bmp);
+
+            for (int i = 0; i < 30; i++)
+            {
+                var c1 = Color.FromArgb(200, 255, 255, 255);
+                var c2 = Color.FromArgb(100, 0, 0, 0);
+                int x = new Random().Next(0, bmp.Width);int y =  new Random().Next(0, bmp.Height);
+                graph.DrawString("小希", new Font("微软雅黑",25), new SolidBrush(c1), new PointF(x-2,y));
+                graph.DrawString("小希", new Font("微软雅黑", 25), new SolidBrush(c1), new PointF(x +2, y));
+                graph.DrawString("小希", new Font("微软雅黑", 25), new SolidBrush(c1), new PointF(x , y - 2));
+                graph.DrawString("小希", new Font("微软雅黑", 25), new SolidBrush(c1), new PointF(x , y+ 2));
+                graph.DrawString("小希", new Font("微软雅黑", 25), new SolidBrush(c2), new PointF(x, y));
+            }
+            MemoryStream ms = null;
+            ms = new MemoryStream();
+            bmp.Save(ms, ImageFormat.Jpeg);
+            byte[] byteImage = new Byte[ms.Length];
+            byteImage = ms.ToArray();
+            await context.Response.Body.WriteAsync(byteImage, 0, byteImage.Length);
+        }
+    }
+}