some update

Server/Apis/Siger.ApiConfig/Controller/DownloadController.cs

@@ -312,5 +312,51 @@ namespace Siger.ApiConfig.Controller
 
             return new ObjectResult(new { content = FileUtility.GetText(truePath) });
         }
+
+        /// <summary>
+        /// 下载文件
+        /// </summary>
+        /// <returns></returns>
+        [HttpGet]
+        [NoResultFilter]
+        public IActionResult DownloadFileByUrl(string url, string name)
+        {
+            if (string.IsNullOrWhiteSpace(url))
+            {
+                return new NoContentResult();
+            }
+            var fileSetting = Config<FileSettings>.Get();
+            if (fileSetting == null)
+            {
+                return new NoContentResult();
+            }
+            var rootDir = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, fileSetting.FileSetting.PhysicalFolder);
+            if (!Directory.Exists(rootDir))
+            {
+                return new NoContentResult();
+            }
+
+            var path = rootDir + url;
+            if (!System.IO.File.Exists(path))
+            {
+                return new NoContentResult();
+            }
+            try
+            {
+                var stream = new FileStream(path, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
+                var response = new HttpResponseMessage(HttpStatusCode.OK) { Content = new StreamContent(stream) };
+                response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
+                response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
+                {
+                    FileName = string.IsNullOrWhiteSpace(name) ? url.Substring(url.LastIndexOf('.')) : name
+                };
+
+                return File(stream, "application/octet-stream");
+            }
+            catch
+            {
+                throw new BadRequestException(CommonEnum.Fail);
+            }
+        }
     }
 }
\ No newline at end of file