Fixed login and error handling

lib/core/service/dio_file_service.dart

@@ -0,0 +1,82 @@
+import 'dart:io';
+// ignore: implementation_imports
+import 'package:flutter_cache_manager/src/web/mime_converter.dart';
+import 'package:dio/dio.dart';
+import 'package:flutter_cache_manager/flutter_cache_manager.dart';
+
+class DioFileService extends FileService {
+  final Dio dio;
+
+  DioFileService(this.dio);
+
+  @override
+  Future<FileServiceResponse> get(String url,
+      {Map<String, String>? headers}) async {
+    final response = await dio.get<ResponseBody>(
+      url,
+      options: Options(
+        headers: headers,
+        responseType: ResponseType.stream,
+      ),
+    );
+    return DioGetResponse(response);
+  }
+}
+
+class DioGetResponse implements FileServiceResponse {
+  final Response<ResponseBody> _response;
+
+  final DateTime _receivedTime = DateTime.now();
+
+  DioGetResponse(this._response);
+
+  @override
+  Stream<List<int>> get content => _response.data!.stream;
+
+  @override
+  int? get contentLength => int.tryParse(
+      _response.headers.value(HttpHeaders.contentLengthHeader) ?? '-1');
+
+  @override
+  String? get eTag => _response.headers.value(HttpHeaders.etagHeader);
+
+  @override
+  String get fileExtension {
+    var fileExtension = '';
+    final contentTypeHeader =
+        _response.headers.value(HttpHeaders.contentTypeHeader);
+    if (contentTypeHeader != null) {
+      final contentType = ContentType.parse(contentTypeHeader);
+      fileExtension = contentType.fileExtension;
+    }
+    return fileExtension;
+  }
+
+  @override
+  int get statusCode => _response.statusCode ?? 200;
+
+  @override
+  DateTime get validTill {
+    // Without a cache-control header we keep the file for a week
+    var ageDuration = const Duration(days: 7);
+    final controlHeader =
+        _response.headers.value(HttpHeaders.cacheControlHeader);
+    if (controlHeader != null) {
+      final controlSettings = controlHeader.split(',');
+      for (final setting in controlSettings) {
+        final sanitizedSetting = setting.trim().toLowerCase();
+        if (sanitizedSetting == 'no-cache') {
+          ageDuration = const Duration();
+        }
+        if (sanitizedSetting.startsWith('max-age=')) {
+          var validSeconds = int.tryParse(sanitizedSetting.split('=')[1]) ?? 0;
+          if (validSeconds > 0) {
+            ageDuration = Duration(seconds: validSeconds);
+          }
+        }
+      }
+    }
+
+    return _receivedTime.add(ageDuration);
+  }
+}