ignore file not found exception (trivial)

modules/blogging/src/Volo.Blogging.Application.Contracts/Volo/Blogging/Files/RawFileDto.cs

@@ -1,7 +1,22 @@
-namespace Volo.Blogging.Files
+using System.Security.Cryptography;
+using Volo.Abp.Threading;
+
+namespace Volo.Blogging.Files
 {
     public class RawFileDto
     {
         public byte[] Bytes { get; set; }
+
+        public bool IsFileEmpty => Bytes == null || Bytes.Length == 0;
+
+        public RawFileDto()
+        {
+            
+        }
+
+        public static RawFileDto EmptyResult()
+        {
+            return new RawFileDto() {Bytes = new byte[0]};
+        }
     }
 }

modules/blogging/src/Volo.Blogging.Application/Volo/Blogging/Files/FileAppService.cs

@@ -2,6 +2,7 @@
 using System.ComponentModel.DataAnnotations;
 using System.IO;
 using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using Volo.Abp;
 using Volo.Abp.Validation;
@@ -12,9 +13,11 @@ namespace Volo.Blogging.Files
     public class FileAppService : BloggingAppServiceBase, IFileAppService
     {
         public BlogFileOptions Options { get; }
+        private readonly ILogger<FileAppService> _logger;
 
-        public FileAppService(IOptions<BlogFileOptions> options)
+        public FileAppService(IOptions<BlogFileOptions> options, ILogger<FileAppService> logger)
         {
+            _logger = logger;
             Options = options.Value;
         }
 
@@ -35,12 +38,13 @@ namespace Volo.Blogging.Files
 
             var filePath = Path.Combine(Options.FileUploadLocalFolder, name);
 
-            return Task.FromResult(
-                new RawFileDto
-                {
-                    Bytes = File.ReadAllBytes(filePath)
-                }
-            );
+            if (File.Exists(filePath))
+            {
+                return Task.FromResult(new RawFileDto {Bytes = File.ReadAllBytes(filePath)});
+            }
+
+            _logger.LogError($"Cannot find the file {filePath}");
+            return Task.FromResult(RawFileDto.EmptyResult());
         }
 
         public virtual Task<FileUploadOutputDto> CreateAsync(FileUploadInputDto input)