additional http status code check

app/lib/domain/services/generic_website.dart

@@ -82,9 +82,13 @@ class GenericWebsiteService extends _$GenericWebsiteService {
       (result) => result.flatMapAsync(
         (info) async {
           if (info.favicon != null) {
-            return _client
+            return _client.get(info.favicon!.url).then((response) {
-                .get(info.favicon!.url)
+              if (response.statusCode == 200) {
-                .then((response) => response.bodyBytes);
+                return response.bodyBytes;
+              } else {
+                return null;
+              }
+            });
           }
 
           return null;

app/lib/domain/services/generic_website.g.dart

@@ -7,7 +7,7 @@ part of 'generic_website.dart';
 // **************************************************************************
 
 String _$genericWebsiteServiceHash() =>
-    r'bb36adc96b55531772554e79e4f72a6f5b038c52';
+    r'6b9f74e6009c04c962273631cee0b1a595c4fa61';
 
 /// See also [GenericWebsiteService].
 @ProviderFor(GenericWebsiteService)