HelpPageService.GetFileStreamAsync удалил ArgumentInvalidException. Заменил возвращаемый тип на Nullable.

AsbCloudApp/Services/IHelpPageService.cs

@@ -27,11 +27,11 @@ public interface IHelpPageService
     /// <summary>
     /// Метод получения файла справки
     /// </summary>
-    /// <param name="urlPage"></param>
+    /// <param name="pageKey"></param>
     /// <param name="idCategory"></param>
     /// <param name="cancellationToken"></param>
     /// <returns></returns>
-    Task<(Stream stream, string fileName)> GetFileStreamAsync(string urlPage,
+    Task<(Stream stream, string fileName)?> GetFileStreamAsync(string pageKey,
         int idCategory,
         CancellationToken cancellationToken);
 }

AsbCloudInfrastructure/Services/HelpPageService.cs

@@ -78,20 +78,23 @@ public class HelpPageService : IHelpPageService
     /// <summary>
     /// Метод получения файла справки
     /// </summary>
-    /// <param name="urlPage"></param>
+    /// <param name="pageKey"></param>
     /// <param name="idCategory"></param>
     /// <param name="cancellationToken"></param>
     /// <returns></returns>
-    /// <exception cref="ArgumentInvalidException"></exception>
+    /// <exception cref="NotFoundException"></exception>
-    public async Task<(Stream stream, string fileName)> GetFileStreamAsync(string urlPage,
+    public async Task<(Stream stream, string fileName)?> GetFileStreamAsync(string pageKey,
         int idCategory,
         CancellationToken cancellationToken)
     {
-        urlPage = WebUtility.UrlDecode(urlPage);
+        pageKey = WebUtility.UrlDecode(pageKey);
         
-        var helpPage = await helpPageRepository.GetOrDefaultByUrlPageAndIdCategoryAsync(urlPage,
+        var helpPage = await helpPageRepository.GetOrDefaultByUrlPageAndIdCategoryAsync(pageKey,
             idCategory,
-            cancellationToken) ?? throw new ArgumentInvalidException("Справки не существует", nameof(idCategory));
+            cancellationToken);
+        
+        if(helpPage is null)
+            return null;
 
         string filePath = fileStorageRepository.GetFilePath(directoryNameHelpPageFiles,
             helpPage.IdCategory.ToString(),

AsbCloudWebApi/Controllers/HelpPageController.cs

@@ -89,14 +89,10 @@ public class HelpPageController : ControllerBase
             idCategory,
             cancellationToken);
 
-        using var fileStream = file.stream;
+        if (!file.HasValue)
+            return NotFound();
         
-        var memoryStream = new MemoryStream();
+        return File(file.Value.stream, "application/pdf", file.Value.fileName);
-        await fileStream.CopyToAsync(memoryStream,
-            cancellationToken);
-        memoryStream.Position = 0;
-        
-        return File(memoryStream, "application/pdf", file.fileName);
     }
 
     /// <summary>