功能调整

AllBase/GetHtml.cs

@@ -12,6 +12,7 @@ using System.Diagnostics;
 using System.Drawing;
 using System.Globalization;
 using System.IO;
+using System.IO.Compression;
 using System.Net;
 using System.Security.Cryptography;
 using System.Text;
@@ -44,6 +45,95 @@ namespace AllBase
 
         }
 
+        /// <summary>
+        /// 读取网络图片转为Img以在DataGridView中显示，用于HttpWebRequest直接读取可能403的情况
+        /// </summary>
+        /// <param name="imgUrl"></param>
+        /// <param name="rst"></param>
+        /// <returns></returns>
+        public static Image GetUrlImg(string imgUrl, out string rst)
+        {
+            rst = "";
+            //return LoadImage(imgUrl);
+            Image image = null;
+            HttpWebResponse response = null;
+            try
+            {
+                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(imgUrl);
+
+                request.KeepAlive = true;
+                request.Headers.Set(HttpRequestHeader.CacheControl, "max-age=0");
+                request.Headers.Add("Upgrade-Insecure-Requests", @"1");
+                request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36";
+                request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7";
+                request.Headers.Set(HttpRequestHeader.AcceptEncoding, "gzip, deflate");
+                request.Headers.Set(HttpRequestHeader.AcceptLanguage, "zh-CN,zh;q=0.9");
+                //request.IfModifiedSince = DateTime.Parse("Fri, 18 Jul 2025 06:00:49 GMT"); // 没改动不更新，CS程序无缓存不使用
+
+                response = (HttpWebResponse)request.GetResponse();
+
+                using (Stream stream = response.GetResponseStream())
+                {
+                    image = Image.FromStream(stream);
+                }
+            }
+            catch (WebException ex)
+            {
+                if (ex.Status == WebExceptionStatus.ProtocolError)
+                {
+                    response = (HttpWebResponse)ex.Response;
+                    rst = ReadResponse(response);
+                }
+                if (string.IsNullOrEmpty(rst))
+                    rst = ex.Message;
+            }
+            catch (Exception e)
+            {
+                rst = e.Message;
+            }
+            if (response != null)
+            {
+                response.Close();
+                response.Dispose();
+            }
+            return image;
+
+            //try
+            //{
+            //    if (!string.IsNullOrEmpty(prodSelect?.main_img))
+            //    {
+            //        using (Stream stream = WebRequest.Create(prodSelect.main_img.Replace("https", "http")).GetResponse().GetResponseStream())
+            //        {
+            //            image = Image.FromStream(stream);
+            //        }
+            //    }
+            //}
+            //catch (Exception ex)
+            //{
+            //}
+        }
+
+        public static string ReadResponse(HttpWebResponse response, Encoding encoding = null)
+        {
+            using (Stream responseStream = response.GetResponseStream())
+            {
+                Stream streamToRead = responseStream;
+                if (response.ContentEncoding.ToLower().Contains("gzip"))
+                {
+                    streamToRead = new GZipStream(streamToRead, CompressionMode.Decompress);
+                }
+                else if (response.ContentEncoding.ToLower().Contains("deflate"))
+                {
+                    streamToRead = new DeflateStream(streamToRead, CompressionMode.Decompress);
+                }
+                if (encoding == null) encoding = Encoding.UTF8;
+                using (StreamReader streamReader = new StreamReader(streamToRead, encoding))
+                {
+                    return streamReader.ReadToEnd();
+                }
+            }
+        }
+
         /// <summary>
         /// 代理抓取
         /// </summary>