diff --git a/lib/api/analytics.dart b/lib/api/analytics.dart
index a97fded..44906ef 100644
--- a/lib/api/analytics.dart
+++ b/lib/api/analytics.dart
@@ -1,4 +1,5 @@
 import 'package:dio/dio.dart';
+import 'package:flutter/foundation.dart';
 import 'package:starcitizen_doctor/common/conf.dart';
 import 'package:starcitizen_doctor/common/utils/base_utils.dart';
 
@@ -6,6 +7,8 @@ class AnalyticsApi {
   static final Dio _dio = Dio();
 
   static touch(String key) async {
+    // debug 不统计
+    if (kDebugMode) return;
     dPrint("AnalyticsApi.touch === $key start");
     try {
       await _dio.post("${AppConf.xkeycApiUrl}/analytics/$key");
diff --git a/lib/common/conf.dart b/lib/common/conf.dart
index 52a5d36..c4893b7 100644
--- a/lib/common/conf.dart
+++ b/lib/common/conf.dart
@@ -6,6 +6,7 @@ import 'package:hive/hive.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:starcitizen_doctor/api/analytics.dart';
 import 'package:starcitizen_doctor/api/api.dart';
+import 'package:starcitizen_doctor/common/rust/ffi.dart';
 import 'package:starcitizen_doctor/data/app_version_data.dart';
 import 'package:uuid/uuid.dart';
 import 'package:window_manager/window_manager.dart';
@@ -65,6 +66,13 @@ class AppConf {
       exit(1);
     }
 
+    /// check Rust bridge
+    if (await rustFii.ping() != "PONG") {
+      dPrint("Rust bridge Error");
+      exit(1);
+    }
+    dPrint("---- rust bridge inited -----");
+
     /// init windows
     await windowManager.ensureInitialized();
     windowManager.waitUntilReadyToShow().then((_) async {
diff --git a/lib/common/rust/bridge_definitions.dart b/lib/common/rust/bridge_definitions.dart
index d5ba786..3022740 100644
--- a/lib/common/rust/bridge_definitions.dart
+++ b/lib/common/rust/bridge_definitions.dart
@@ -7,28 +7,61 @@ import 'dart:async';
 import 'package:meta/meta.dart';
 import 'package:flutter_rust_bridge/flutter_rust_bridge.dart';
 import 'package:uuid/uuid.dart';
+import 'package:freezed_annotation/freezed_annotation.dart' hide protected;
+
+part 'bridge_definitions.freezed.dart';
 
 abstract class Rust {
-  Future<Platform> platform({dynamic hint});
+  Future<String> ping({dynamic hint});
 
-  FlutterRustBridgeTaskConstMeta get kPlatformConstMeta;
+  FlutterRustBridgeTaskConstMeta get kPingConstMeta;
 
-  Future<int> add({required int left, required int right, dynamic hint});
+  Stream<DownloadCallbackData> startDownload(
+      {required String url,
+      required String savePath,
+      required String fileName,
+      required int connectionCount,
+      dynamic hint});
 
-  FlutterRustBridgeTaskConstMeta get kAddConstMeta;
+  FlutterRustBridgeTaskConstMeta get kStartDownloadConstMeta;
 
-  Future<bool> rustReleaseMode({dynamic hint});
+  Future<void> cancelDownload({required String id, dynamic hint});
 
-  FlutterRustBridgeTaskConstMeta get kRustReleaseModeConstMeta;
+  FlutterRustBridgeTaskConstMeta get kCancelDownloadConstMeta;
 }
 
-enum Platform {
-  Unknown,
-  Android,
-  Ios,
-  Windows,
-  Unix,
-  MacIntel,
-  MacApple,
-  Wasm,
+class DownloadCallbackData {
+  final String id;
+  final int total;
+  final int progress;
+  final int speed;
+  final MyDownloaderStatus status;
+
+  const DownloadCallbackData({
+    required this.id,
+    required this.total,
+    required this.progress,
+    required this.speed,
+    required this.status,
+  });
+}
+
+@freezed
+sealed class MyDownloaderStatus with _$MyDownloaderStatus {
+  const factory MyDownloaderStatus.noStart() = MyDownloaderStatus_NoStart;
+  const factory MyDownloaderStatus.running() = MyDownloaderStatus_Running;
+  const factory MyDownloaderStatus.pending(
+    MyNetworkItemPendingType field0,
+  ) = MyDownloaderStatus_Pending;
+  const factory MyDownloaderStatus.error(
+    String field0,
+  ) = MyDownloaderStatus_Error;
+  const factory MyDownloaderStatus.finished() = MyDownloaderStatus_Finished;
+}
+
+enum MyNetworkItemPendingType {
+  QueueUp,
+  Starting,
+  Stopping,
+  Initializing,
 }
diff --git a/lib/common/rust/bridge_definitions.freezed.dart b/lib/common/rust/bridge_definitions.freezed.dart
new file mode 100644
index 0000000..b47427b
--- /dev/null
+++ b/lib/common/rust/bridge_definitions.freezed.dart
@@ -0,0 +1,778 @@
+// coverage:ignore-file
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint
+// ignore_for_file: unused_element, deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies, annotate_overrides, invalid_annotation_target, unnecessary_question_mark
+
+part of 'bridge_definitions.dart';
+
+// **************************************************************************
+// FreezedGenerator
+// **************************************************************************
+
+T _$identity<T>(T value) => value;
+
+final _privateConstructorUsedError = UnsupportedError(
+    'It seems like you constructed your class using `MyClass._()`. This constructor is only meant to be used by freezed and you are not supposed to need it nor use it.\nPlease check the documentation here for more information: https://github.com/rrousselGit/freezed#custom-getters-and-methods');
+
+/// @nodoc
+mixin _$MyDownloaderStatus {
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() noStart,
+    required TResult Function() running,
+    required TResult Function(MyNetworkItemPendingType field0) pending,
+    required TResult Function(String field0) error,
+    required TResult Function() finished,
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? noStart,
+    TResult? Function()? running,
+    TResult? Function(MyNetworkItemPendingType field0)? pending,
+    TResult? Function(String field0)? error,
+    TResult? Function()? finished,
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? noStart,
+    TResult Function()? running,
+    TResult Function(MyNetworkItemPendingType field0)? pending,
+    TResult Function(String field0)? error,
+    TResult Function()? finished,
+    required TResult orElse(),
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(MyDownloaderStatus_NoStart value) noStart,
+    required TResult Function(MyDownloaderStatus_Running value) running,
+    required TResult Function(MyDownloaderStatus_Pending value) pending,
+    required TResult Function(MyDownloaderStatus_Error value) error,
+    required TResult Function(MyDownloaderStatus_Finished value) finished,
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(MyDownloaderStatus_NoStart value)? noStart,
+    TResult? Function(MyDownloaderStatus_Running value)? running,
+    TResult? Function(MyDownloaderStatus_Pending value)? pending,
+    TResult? Function(MyDownloaderStatus_Error value)? error,
+    TResult? Function(MyDownloaderStatus_Finished value)? finished,
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(MyDownloaderStatus_NoStart value)? noStart,
+    TResult Function(MyDownloaderStatus_Running value)? running,
+    TResult Function(MyDownloaderStatus_Pending value)? pending,
+    TResult Function(MyDownloaderStatus_Error value)? error,
+    TResult Function(MyDownloaderStatus_Finished value)? finished,
+    required TResult orElse(),
+  }) =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $MyDownloaderStatusCopyWith<$Res> {
+  factory $MyDownloaderStatusCopyWith(
+          MyDownloaderStatus value, $Res Function(MyDownloaderStatus) then) =
+      _$MyDownloaderStatusCopyWithImpl<$Res, MyDownloaderStatus>;
+}
+
+/// @nodoc
+class _$MyDownloaderStatusCopyWithImpl<$Res, $Val extends MyDownloaderStatus>
+    implements $MyDownloaderStatusCopyWith<$Res> {
+  _$MyDownloaderStatusCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+}
+
+/// @nodoc
+abstract class _$$MyDownloaderStatus_NoStartImplCopyWith<$Res> {
+  factory _$$MyDownloaderStatus_NoStartImplCopyWith(
+          _$MyDownloaderStatus_NoStartImpl value,
+          $Res Function(_$MyDownloaderStatus_NoStartImpl) then) =
+      __$$MyDownloaderStatus_NoStartImplCopyWithImpl<$Res>;
+}
+
+/// @nodoc
+class __$$MyDownloaderStatus_NoStartImplCopyWithImpl<$Res>
+    extends _$MyDownloaderStatusCopyWithImpl<$Res,
+        _$MyDownloaderStatus_NoStartImpl>
+    implements _$$MyDownloaderStatus_NoStartImplCopyWith<$Res> {
+  __$$MyDownloaderStatus_NoStartImplCopyWithImpl(
+      _$MyDownloaderStatus_NoStartImpl _value,
+      $Res Function(_$MyDownloaderStatus_NoStartImpl) _then)
+      : super(_value, _then);
+}
+
+/// @nodoc
+
+class _$MyDownloaderStatus_NoStartImpl implements MyDownloaderStatus_NoStart {
+  const _$MyDownloaderStatus_NoStartImpl();
+
+  @override
+  String toString() {
+    return 'MyDownloaderStatus.noStart()';
+  }
+
+  @override
+  bool operator ==(dynamic other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$MyDownloaderStatus_NoStartImpl);
+  }
+
+  @override
+  int get hashCode => runtimeType.hashCode;
+
+  @override
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() noStart,
+    required TResult Function() running,
+    required TResult Function(MyNetworkItemPendingType field0) pending,
+    required TResult Function(String field0) error,
+    required TResult Function() finished,
+  }) {
+    return noStart();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? noStart,
+    TResult? Function()? running,
+    TResult? Function(MyNetworkItemPendingType field0)? pending,
+    TResult? Function(String field0)? error,
+    TResult? Function()? finished,
+  }) {
+    return noStart?.call();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? noStart,
+    TResult Function()? running,
+    TResult Function(MyNetworkItemPendingType field0)? pending,
+    TResult Function(String field0)? error,
+    TResult Function()? finished,
+    required TResult orElse(),
+  }) {
+    if (noStart != null) {
+      return noStart();
+    }
+    return orElse();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(MyDownloaderStatus_NoStart value) noStart,
+    required TResult Function(MyDownloaderStatus_Running value) running,
+    required TResult Function(MyDownloaderStatus_Pending value) pending,
+    required TResult Function(MyDownloaderStatus_Error value) error,
+    required TResult Function(MyDownloaderStatus_Finished value) finished,
+  }) {
+    return noStart(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(MyDownloaderStatus_NoStart value)? noStart,
+    TResult? Function(MyDownloaderStatus_Running value)? running,
+    TResult? Function(MyDownloaderStatus_Pending value)? pending,
+    TResult? Function(MyDownloaderStatus_Error value)? error,
+    TResult? Function(MyDownloaderStatus_Finished value)? finished,
+  }) {
+    return noStart?.call(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(MyDownloaderStatus_NoStart value)? noStart,
+    TResult Function(MyDownloaderStatus_Running value)? running,
+    TResult Function(MyDownloaderStatus_Pending value)? pending,
+    TResult Function(MyDownloaderStatus_Error value)? error,
+    TResult Function(MyDownloaderStatus_Finished value)? finished,
+    required TResult orElse(),
+  }) {
+    if (noStart != null) {
+      return noStart(this);
+    }
+    return orElse();
+  }
+}
+
+abstract class MyDownloaderStatus_NoStart implements MyDownloaderStatus {
+  const factory MyDownloaderStatus_NoStart() = _$MyDownloaderStatus_NoStartImpl;
+}
+
+/// @nodoc
+abstract class _$$MyDownloaderStatus_RunningImplCopyWith<$Res> {
+  factory _$$MyDownloaderStatus_RunningImplCopyWith(
+          _$MyDownloaderStatus_RunningImpl value,
+          $Res Function(_$MyDownloaderStatus_RunningImpl) then) =
+      __$$MyDownloaderStatus_RunningImplCopyWithImpl<$Res>;
+}
+
+/// @nodoc
+class __$$MyDownloaderStatus_RunningImplCopyWithImpl<$Res>
+    extends _$MyDownloaderStatusCopyWithImpl<$Res,
+        _$MyDownloaderStatus_RunningImpl>
+    implements _$$MyDownloaderStatus_RunningImplCopyWith<$Res> {
+  __$$MyDownloaderStatus_RunningImplCopyWithImpl(
+      _$MyDownloaderStatus_RunningImpl _value,
+      $Res Function(_$MyDownloaderStatus_RunningImpl) _then)
+      : super(_value, _then);
+}
+
+/// @nodoc
+
+class _$MyDownloaderStatus_RunningImpl implements MyDownloaderStatus_Running {
+  const _$MyDownloaderStatus_RunningImpl();
+
+  @override
+  String toString() {
+    return 'MyDownloaderStatus.running()';
+  }
+
+  @override
+  bool operator ==(dynamic other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$MyDownloaderStatus_RunningImpl);
+  }
+
+  @override
+  int get hashCode => runtimeType.hashCode;
+
+  @override
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() noStart,
+    required TResult Function() running,
+    required TResult Function(MyNetworkItemPendingType field0) pending,
+    required TResult Function(String field0) error,
+    required TResult Function() finished,
+  }) {
+    return running();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? noStart,
+    TResult? Function()? running,
+    TResult? Function(MyNetworkItemPendingType field0)? pending,
+    TResult? Function(String field0)? error,
+    TResult? Function()? finished,
+  }) {
+    return running?.call();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? noStart,
+    TResult Function()? running,
+    TResult Function(MyNetworkItemPendingType field0)? pending,
+    TResult Function(String field0)? error,
+    TResult Function()? finished,
+    required TResult orElse(),
+  }) {
+    if (running != null) {
+      return running();
+    }
+    return orElse();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(MyDownloaderStatus_NoStart value) noStart,
+    required TResult Function(MyDownloaderStatus_Running value) running,
+    required TResult Function(MyDownloaderStatus_Pending value) pending,
+    required TResult Function(MyDownloaderStatus_Error value) error,
+    required TResult Function(MyDownloaderStatus_Finished value) finished,
+  }) {
+    return running(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(MyDownloaderStatus_NoStart value)? noStart,
+    TResult? Function(MyDownloaderStatus_Running value)? running,
+    TResult? Function(MyDownloaderStatus_Pending value)? pending,
+    TResult? Function(MyDownloaderStatus_Error value)? error,
+    TResult? Function(MyDownloaderStatus_Finished value)? finished,
+  }) {
+    return running?.call(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(MyDownloaderStatus_NoStart value)? noStart,
+    TResult Function(MyDownloaderStatus_Running value)? running,
+    TResult Function(MyDownloaderStatus_Pending value)? pending,
+    TResult Function(MyDownloaderStatus_Error value)? error,
+    TResult Function(MyDownloaderStatus_Finished value)? finished,
+    required TResult orElse(),
+  }) {
+    if (running != null) {
+      return running(this);
+    }
+    return orElse();
+  }
+}
+
+abstract class MyDownloaderStatus_Running implements MyDownloaderStatus {
+  const factory MyDownloaderStatus_Running() = _$MyDownloaderStatus_RunningImpl;
+}
+
+/// @nodoc
+abstract class _$$MyDownloaderStatus_PendingImplCopyWith<$Res> {
+  factory _$$MyDownloaderStatus_PendingImplCopyWith(
+          _$MyDownloaderStatus_PendingImpl value,
+          $Res Function(_$MyDownloaderStatus_PendingImpl) then) =
+      __$$MyDownloaderStatus_PendingImplCopyWithImpl<$Res>;
+  @useResult
+  $Res call({MyNetworkItemPendingType field0});
+}
+
+/// @nodoc
+class __$$MyDownloaderStatus_PendingImplCopyWithImpl<$Res>
+    extends _$MyDownloaderStatusCopyWithImpl<$Res,
+        _$MyDownloaderStatus_PendingImpl>
+    implements _$$MyDownloaderStatus_PendingImplCopyWith<$Res> {
+  __$$MyDownloaderStatus_PendingImplCopyWithImpl(
+      _$MyDownloaderStatus_PendingImpl _value,
+      $Res Function(_$MyDownloaderStatus_PendingImpl) _then)
+      : super(_value, _then);
+
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? field0 = null,
+  }) {
+    return _then(_$MyDownloaderStatus_PendingImpl(
+      null == field0
+          ? _value.field0
+          : field0 // ignore: cast_nullable_to_non_nullable
+              as MyNetworkItemPendingType,
+    ));
+  }
+}
+
+/// @nodoc
+
+class _$MyDownloaderStatus_PendingImpl implements MyDownloaderStatus_Pending {
+  const _$MyDownloaderStatus_PendingImpl(this.field0);
+
+  @override
+  final MyNetworkItemPendingType field0;
+
+  @override
+  String toString() {
+    return 'MyDownloaderStatus.pending(field0: $field0)';
+  }
+
+  @override
+  bool operator ==(dynamic other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$MyDownloaderStatus_PendingImpl &&
+            (identical(other.field0, field0) || other.field0 == field0));
+  }
+
+  @override
+  int get hashCode => Object.hash(runtimeType, field0);
+
+  @JsonKey(ignore: true)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$MyDownloaderStatus_PendingImplCopyWith<_$MyDownloaderStatus_PendingImpl>
+      get copyWith => __$$MyDownloaderStatus_PendingImplCopyWithImpl<
+          _$MyDownloaderStatus_PendingImpl>(this, _$identity);
+
+  @override
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() noStart,
+    required TResult Function() running,
+    required TResult Function(MyNetworkItemPendingType field0) pending,
+    required TResult Function(String field0) error,
+    required TResult Function() finished,
+  }) {
+    return pending(field0);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? noStart,
+    TResult? Function()? running,
+    TResult? Function(MyNetworkItemPendingType field0)? pending,
+    TResult? Function(String field0)? error,
+    TResult? Function()? finished,
+  }) {
+    return pending?.call(field0);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? noStart,
+    TResult Function()? running,
+    TResult Function(MyNetworkItemPendingType field0)? pending,
+    TResult Function(String field0)? error,
+    TResult Function()? finished,
+    required TResult orElse(),
+  }) {
+    if (pending != null) {
+      return pending(field0);
+    }
+    return orElse();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(MyDownloaderStatus_NoStart value) noStart,
+    required TResult Function(MyDownloaderStatus_Running value) running,
+    required TResult Function(MyDownloaderStatus_Pending value) pending,
+    required TResult Function(MyDownloaderStatus_Error value) error,
+    required TResult Function(MyDownloaderStatus_Finished value) finished,
+  }) {
+    return pending(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(MyDownloaderStatus_NoStart value)? noStart,
+    TResult? Function(MyDownloaderStatus_Running value)? running,
+    TResult? Function(MyDownloaderStatus_Pending value)? pending,
+    TResult? Function(MyDownloaderStatus_Error value)? error,
+    TResult? Function(MyDownloaderStatus_Finished value)? finished,
+  }) {
+    return pending?.call(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(MyDownloaderStatus_NoStart value)? noStart,
+    TResult Function(MyDownloaderStatus_Running value)? running,
+    TResult Function(MyDownloaderStatus_Pending value)? pending,
+    TResult Function(MyDownloaderStatus_Error value)? error,
+    TResult Function(MyDownloaderStatus_Finished value)? finished,
+    required TResult orElse(),
+  }) {
+    if (pending != null) {
+      return pending(this);
+    }
+    return orElse();
+  }
+}
+
+abstract class MyDownloaderStatus_Pending implements MyDownloaderStatus {
+  const factory MyDownloaderStatus_Pending(
+      final MyNetworkItemPendingType field0) = _$MyDownloaderStatus_PendingImpl;
+
+  MyNetworkItemPendingType get field0;
+  @JsonKey(ignore: true)
+  _$$MyDownloaderStatus_PendingImplCopyWith<_$MyDownloaderStatus_PendingImpl>
+      get copyWith => throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class _$$MyDownloaderStatus_ErrorImplCopyWith<$Res> {
+  factory _$$MyDownloaderStatus_ErrorImplCopyWith(
+          _$MyDownloaderStatus_ErrorImpl value,
+          $Res Function(_$MyDownloaderStatus_ErrorImpl) then) =
+      __$$MyDownloaderStatus_ErrorImplCopyWithImpl<$Res>;
+  @useResult
+  $Res call({String field0});
+}
+
+/// @nodoc
+class __$$MyDownloaderStatus_ErrorImplCopyWithImpl<$Res>
+    extends _$MyDownloaderStatusCopyWithImpl<$Res,
+        _$MyDownloaderStatus_ErrorImpl>
+    implements _$$MyDownloaderStatus_ErrorImplCopyWith<$Res> {
+  __$$MyDownloaderStatus_ErrorImplCopyWithImpl(
+      _$MyDownloaderStatus_ErrorImpl _value,
+      $Res Function(_$MyDownloaderStatus_ErrorImpl) _then)
+      : super(_value, _then);
+
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? field0 = null,
+  }) {
+    return _then(_$MyDownloaderStatus_ErrorImpl(
+      null == field0
+          ? _value.field0
+          : field0 // ignore: cast_nullable_to_non_nullable
+              as String,
+    ));
+  }
+}
+
+/// @nodoc
+
+class _$MyDownloaderStatus_ErrorImpl implements MyDownloaderStatus_Error {
+  const _$MyDownloaderStatus_ErrorImpl(this.field0);
+
+  @override
+  final String field0;
+
+  @override
+  String toString() {
+    return 'MyDownloaderStatus.error(field0: $field0)';
+  }
+
+  @override
+  bool operator ==(dynamic other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$MyDownloaderStatus_ErrorImpl &&
+            (identical(other.field0, field0) || other.field0 == field0));
+  }
+
+  @override
+  int get hashCode => Object.hash(runtimeType, field0);
+
+  @JsonKey(ignore: true)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$MyDownloaderStatus_ErrorImplCopyWith<_$MyDownloaderStatus_ErrorImpl>
+      get copyWith => __$$MyDownloaderStatus_ErrorImplCopyWithImpl<
+          _$MyDownloaderStatus_ErrorImpl>(this, _$identity);
+
+  @override
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() noStart,
+    required TResult Function() running,
+    required TResult Function(MyNetworkItemPendingType field0) pending,
+    required TResult Function(String field0) error,
+    required TResult Function() finished,
+  }) {
+    return error(field0);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? noStart,
+    TResult? Function()? running,
+    TResult? Function(MyNetworkItemPendingType field0)? pending,
+    TResult? Function(String field0)? error,
+    TResult? Function()? finished,
+  }) {
+    return error?.call(field0);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? noStart,
+    TResult Function()? running,
+    TResult Function(MyNetworkItemPendingType field0)? pending,
+    TResult Function(String field0)? error,
+    TResult Function()? finished,
+    required TResult orElse(),
+  }) {
+    if (error != null) {
+      return error(field0);
+    }
+    return orElse();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(MyDownloaderStatus_NoStart value) noStart,
+    required TResult Function(MyDownloaderStatus_Running value) running,
+    required TResult Function(MyDownloaderStatus_Pending value) pending,
+    required TResult Function(MyDownloaderStatus_Error value) error,
+    required TResult Function(MyDownloaderStatus_Finished value) finished,
+  }) {
+    return error(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(MyDownloaderStatus_NoStart value)? noStart,
+    TResult? Function(MyDownloaderStatus_Running value)? running,
+    TResult? Function(MyDownloaderStatus_Pending value)? pending,
+    TResult? Function(MyDownloaderStatus_Error value)? error,
+    TResult? Function(MyDownloaderStatus_Finished value)? finished,
+  }) {
+    return error?.call(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(MyDownloaderStatus_NoStart value)? noStart,
+    TResult Function(MyDownloaderStatus_Running value)? running,
+    TResult Function(MyDownloaderStatus_Pending value)? pending,
+    TResult Function(MyDownloaderStatus_Error value)? error,
+    TResult Function(MyDownloaderStatus_Finished value)? finished,
+    required TResult orElse(),
+  }) {
+    if (error != null) {
+      return error(this);
+    }
+    return orElse();
+  }
+}
+
+abstract class MyDownloaderStatus_Error implements MyDownloaderStatus {
+  const factory MyDownloaderStatus_Error(final String field0) =
+      _$MyDownloaderStatus_ErrorImpl;
+
+  String get field0;
+  @JsonKey(ignore: true)
+  _$$MyDownloaderStatus_ErrorImplCopyWith<_$MyDownloaderStatus_ErrorImpl>
+      get copyWith => throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class _$$MyDownloaderStatus_FinishedImplCopyWith<$Res> {
+  factory _$$MyDownloaderStatus_FinishedImplCopyWith(
+          _$MyDownloaderStatus_FinishedImpl value,
+          $Res Function(_$MyDownloaderStatus_FinishedImpl) then) =
+      __$$MyDownloaderStatus_FinishedImplCopyWithImpl<$Res>;
+}
+
+/// @nodoc
+class __$$MyDownloaderStatus_FinishedImplCopyWithImpl<$Res>
+    extends _$MyDownloaderStatusCopyWithImpl<$Res,
+        _$MyDownloaderStatus_FinishedImpl>
+    implements _$$MyDownloaderStatus_FinishedImplCopyWith<$Res> {
+  __$$MyDownloaderStatus_FinishedImplCopyWithImpl(
+      _$MyDownloaderStatus_FinishedImpl _value,
+      $Res Function(_$MyDownloaderStatus_FinishedImpl) _then)
+      : super(_value, _then);
+}
+
+/// @nodoc
+
+class _$MyDownloaderStatus_FinishedImpl implements MyDownloaderStatus_Finished {
+  const _$MyDownloaderStatus_FinishedImpl();
+
+  @override
+  String toString() {
+    return 'MyDownloaderStatus.finished()';
+  }
+
+  @override
+  bool operator ==(dynamic other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$MyDownloaderStatus_FinishedImpl);
+  }
+
+  @override
+  int get hashCode => runtimeType.hashCode;
+
+  @override
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() noStart,
+    required TResult Function() running,
+    required TResult Function(MyNetworkItemPendingType field0) pending,
+    required TResult Function(String field0) error,
+    required TResult Function() finished,
+  }) {
+    return finished();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? noStart,
+    TResult? Function()? running,
+    TResult? Function(MyNetworkItemPendingType field0)? pending,
+    TResult? Function(String field0)? error,
+    TResult? Function()? finished,
+  }) {
+    return finished?.call();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? noStart,
+    TResult Function()? running,
+    TResult Function(MyNetworkItemPendingType field0)? pending,
+    TResult Function(String field0)? error,
+    TResult Function()? finished,
+    required TResult orElse(),
+  }) {
+    if (finished != null) {
+      return finished();
+    }
+    return orElse();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(MyDownloaderStatus_NoStart value) noStart,
+    required TResult Function(MyDownloaderStatus_Running value) running,
+    required TResult Function(MyDownloaderStatus_Pending value) pending,
+    required TResult Function(MyDownloaderStatus_Error value) error,
+    required TResult Function(MyDownloaderStatus_Finished value) finished,
+  }) {
+    return finished(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(MyDownloaderStatus_NoStart value)? noStart,
+    TResult? Function(MyDownloaderStatus_Running value)? running,
+    TResult? Function(MyDownloaderStatus_Pending value)? pending,
+    TResult? Function(MyDownloaderStatus_Error value)? error,
+    TResult? Function(MyDownloaderStatus_Finished value)? finished,
+  }) {
+    return finished?.call(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(MyDownloaderStatus_NoStart value)? noStart,
+    TResult Function(MyDownloaderStatus_Running value)? running,
+    TResult Function(MyDownloaderStatus_Pending value)? pending,
+    TResult Function(MyDownloaderStatus_Error value)? error,
+    TResult Function(MyDownloaderStatus_Finished value)? finished,
+    required TResult orElse(),
+  }) {
+    if (finished != null) {
+      return finished(this);
+    }
+    return orElse();
+  }
+}
+
+abstract class MyDownloaderStatus_Finished implements MyDownloaderStatus {
+  const factory MyDownloaderStatus_Finished() =
+      _$MyDownloaderStatus_FinishedImpl;
+}
diff --git a/lib/common/rust/bridge_generated.dart b/lib/common/rust/bridge_generated.dart
index 4391c92..c83be4b 100644
--- a/lib/common/rust/bridge_generated.dart
+++ b/lib/common/rust/bridge_generated.dart
@@ -25,57 +25,66 @@ class RustImpl implements Rust {
   factory RustImpl.wasm(FutureOr<WasmModule> module) =>
       RustImpl(module as ExternalLibrary);
   RustImpl.raw(this._platform);
-  Future<Platform> platform({dynamic hint}) {
+  Future<String> ping({dynamic hint}) {
     return _platform.executeNormal(FlutterRustBridgeTask(
-      callFfi: (port_) => _platform.inner.wire_platform(port_),
-      parseSuccessData: _wire2api_platform,
+      callFfi: (port_) => _platform.inner.wire_ping(port_),
+      parseSuccessData: _wire2api_String,
       parseErrorData: null,
-      constMeta: kPlatformConstMeta,
+      constMeta: kPingConstMeta,
       argValues: [],
       hint: hint,
     ));
   }
 
-  FlutterRustBridgeTaskConstMeta get kPlatformConstMeta =>
+  FlutterRustBridgeTaskConstMeta get kPingConstMeta =>
       const FlutterRustBridgeTaskConstMeta(
-        debugName: "platform",
+        debugName: "ping",
         argNames: [],
       );
 
-  Future<int> add({required int left, required int right, dynamic hint}) {
-    var arg0 = api2wire_usize(left);
-    var arg1 = api2wire_usize(right);
-    return _platform.executeNormal(FlutterRustBridgeTask(
-      callFfi: (port_) => _platform.inner.wire_add(port_, arg0, arg1),
-      parseSuccessData: _wire2api_usize,
+  Stream<DownloadCallbackData> startDownload(
+      {required String url,
+      required String savePath,
+      required String fileName,
+      required int connectionCount,
+      dynamic hint}) {
+    var arg0 = _platform.api2wire_String(url);
+    var arg1 = _platform.api2wire_String(savePath);
+    var arg2 = _platform.api2wire_String(fileName);
+    var arg3 = api2wire_u8(connectionCount);
+    return _platform.executeStream(FlutterRustBridgeTask(
+      callFfi: (port_) =>
+          _platform.inner.wire_start_download(port_, arg0, arg1, arg2, arg3),
+      parseSuccessData: _wire2api_download_callback_data,
       parseErrorData: null,
-      constMeta: kAddConstMeta,
-      argValues: [left, right],
+      constMeta: kStartDownloadConstMeta,
+      argValues: [url, savePath, fileName, connectionCount],
       hint: hint,
     ));
   }
 
-  FlutterRustBridgeTaskConstMeta get kAddConstMeta =>
+  FlutterRustBridgeTaskConstMeta get kStartDownloadConstMeta =>
       const FlutterRustBridgeTaskConstMeta(
-        debugName: "add",
-        argNames: ["left", "right"],
+        debugName: "start_download",
+        argNames: ["url", "savePath", "fileName", "connectionCount"],
       );
 
-  Future<bool> rustReleaseMode({dynamic hint}) {
+  Future<void> cancelDownload({required String id, dynamic hint}) {
+    var arg0 = _platform.api2wire_String(id);
     return _platform.executeNormal(FlutterRustBridgeTask(
-      callFfi: (port_) => _platform.inner.wire_rust_release_mode(port_),
-      parseSuccessData: _wire2api_bool,
+      callFfi: (port_) => _platform.inner.wire_cancel_download(port_, arg0),
+      parseSuccessData: _wire2api_unit,
       parseErrorData: null,
-      constMeta: kRustReleaseModeConstMeta,
-      argValues: [],
+      constMeta: kCancelDownloadConstMeta,
+      argValues: [id],
       hint: hint,
     ));
   }
 
-  FlutterRustBridgeTaskConstMeta get kRustReleaseModeConstMeta =>
+  FlutterRustBridgeTaskConstMeta get kCancelDownloadConstMeta =>
       const FlutterRustBridgeTaskConstMeta(
-        debugName: "rust_release_mode",
-        argNames: [],
+        debugName: "cancel_download",
+        argNames: ["id"],
       );
 
   void dispose() {
@@ -83,29 +92,76 @@ class RustImpl implements Rust {
   }
 // Section: wire2api
 
-  bool _wire2api_bool(dynamic raw) {
-    return raw as bool;
+  String _wire2api_String(dynamic raw) {
+    return raw as String;
+  }
+
+  DownloadCallbackData _wire2api_download_callback_data(dynamic raw) {
+    final arr = raw as List<dynamic>;
+    if (arr.length != 5)
+      throw Exception('unexpected arr length: expect 5 but see ${arr.length}');
+    return DownloadCallbackData(
+      id: _wire2api_String(arr[0]),
+      total: _wire2api_u64(arr[1]),
+      progress: _wire2api_u64(arr[2]),
+      speed: _wire2api_u64(arr[3]),
+      status: _wire2api_my_downloader_status(arr[4]),
+    );
   }
 
   int _wire2api_i32(dynamic raw) {
     return raw as int;
   }
 
-  Platform _wire2api_platform(dynamic raw) {
-    return Platform.values[raw as int];
+  MyDownloaderStatus _wire2api_my_downloader_status(dynamic raw) {
+    switch (raw[0]) {
+      case 0:
+        return MyDownloaderStatus_NoStart();
+      case 1:
+        return MyDownloaderStatus_Running();
+      case 2:
+        return MyDownloaderStatus_Pending(
+          _wire2api_my_network_item_pending_type(raw[1]),
+        );
+      case 3:
+        return MyDownloaderStatus_Error(
+          _wire2api_String(raw[1]),
+        );
+      case 4:
+        return MyDownloaderStatus_Finished();
+      default:
+        throw Exception("unreachable");
+    }
   }
 
-  int _wire2api_usize(dynamic raw) {
+  MyNetworkItemPendingType _wire2api_my_network_item_pending_type(dynamic raw) {
+    return MyNetworkItemPendingType.values[raw as int];
+  }
+
+  int _wire2api_u64(dynamic raw) {
     return castInt(raw);
   }
+
+  int _wire2api_u8(dynamic raw) {
+    return raw as int;
+  }
+
+  Uint8List _wire2api_uint_8_list(dynamic raw) {
+    return raw as Uint8List;
+  }
+
+  void _wire2api_unit(dynamic raw) {
+    return;
+  }
 }
 
 // Section: api2wire
 
 @protected
-int api2wire_usize(int raw) {
+int api2wire_u8(int raw) {
   return raw;
 }
+
 // Section: finalizer
 
 class RustPlatform extends FlutterRustBridgeBase<RustWire> {
@@ -113,6 +169,17 @@ class RustPlatform extends FlutterRustBridgeBase<RustWire> {
 
 // Section: api2wire
 
+  @protected
+  ffi.Pointer<wire_uint_8_list> api2wire_String(String raw) {
+    return api2wire_uint_8_list(utf8.encoder.convert(raw));
+  }
+
+  @protected
+  ffi.Pointer<wire_uint_8_list> api2wire_uint_8_list(Uint8List raw) {
+    final ans = inner.new_uint_8_list_0(raw.length);
+    ans.ref.ptr.asTypedList(raw.length).setAll(0, raw);
+    return ans;
+  }
 // Section: finalizer
 
 // Section: api_fill_to_wire
@@ -213,51 +280,77 @@ class RustWire implements FlutterRustBridgeWireBase {
   late final _init_frb_dart_api_dl = _init_frb_dart_api_dlPtr
       .asFunction<int Function(ffi.Pointer<ffi.Void>)>();
 
-  void wire_platform(
+  void wire_ping(
     int port_,
   ) {
-    return _wire_platform(
+    return _wire_ping(
       port_,
     );
   }
 
-  late final _wire_platformPtr =
-      _lookup<ffi.NativeFunction<ffi.Void Function(ffi.Int64)>>(
-          'wire_platform');
-  late final _wire_platform =
-      _wire_platformPtr.asFunction<void Function(int)>();
+  late final _wire_pingPtr =
+      _lookup<ffi.NativeFunction<ffi.Void Function(ffi.Int64)>>('wire_ping');
+  late final _wire_ping = _wire_pingPtr.asFunction<void Function(int)>();
 
-  void wire_add(
+  void wire_start_download(
     int port_,
-    int left,
-    int right,
+    ffi.Pointer<wire_uint_8_list> url,
+    ffi.Pointer<wire_uint_8_list> save_path,
+    ffi.Pointer<wire_uint_8_list> file_name,
+    int connection_count,
   ) {
-    return _wire_add(
+    return _wire_start_download(
       port_,
-      left,
-      right,
+      url,
+      save_path,
+      file_name,
+      connection_count,
     );
   }
 
-  late final _wire_addPtr = _lookup<
+  late final _wire_start_downloadPtr = _lookup<
       ffi.NativeFunction<
-          ffi.Void Function(ffi.Int64, ffi.UintPtr, ffi.UintPtr)>>('wire_add');
-  late final _wire_add =
-      _wire_addPtr.asFunction<void Function(int, int, int)>();
+          ffi.Void Function(
+              ffi.Int64,
+              ffi.Pointer<wire_uint_8_list>,
+              ffi.Pointer<wire_uint_8_list>,
+              ffi.Pointer<wire_uint_8_list>,
+              ffi.Uint8)>>('wire_start_download');
+  late final _wire_start_download = _wire_start_downloadPtr.asFunction<
+      void Function(int, ffi.Pointer<wire_uint_8_list>,
+          ffi.Pointer<wire_uint_8_list>, ffi.Pointer<wire_uint_8_list>, int)>();
 
-  void wire_rust_release_mode(
+  void wire_cancel_download(
     int port_,
+    ffi.Pointer<wire_uint_8_list> id,
   ) {
-    return _wire_rust_release_mode(
+    return _wire_cancel_download(
       port_,
+      id,
     );
   }
 
-  late final _wire_rust_release_modePtr =
-      _lookup<ffi.NativeFunction<ffi.Void Function(ffi.Int64)>>(
-          'wire_rust_release_mode');
-  late final _wire_rust_release_mode =
-      _wire_rust_release_modePtr.asFunction<void Function(int)>();
+  late final _wire_cancel_downloadPtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Void Function(ffi.Int64,
+              ffi.Pointer<wire_uint_8_list>)>>('wire_cancel_download');
+  late final _wire_cancel_download = _wire_cancel_downloadPtr
+      .asFunction<void Function(int, ffi.Pointer<wire_uint_8_list>)>();
+
+  ffi.Pointer<wire_uint_8_list> new_uint_8_list_0(
+    int len,
+  ) {
+    return _new_uint_8_list_0(
+      len,
+    );
+  }
+
+  late final _new_uint_8_list_0Ptr = _lookup<
+          ffi
+          .NativeFunction<ffi.Pointer<wire_uint_8_list> Function(ffi.Int32)>>(
+      'new_uint_8_list_0');
+  late final _new_uint_8_list_0 = _new_uint_8_list_0Ptr
+      .asFunction<ffi.Pointer<wire_uint_8_list> Function(int)>();
 
   void free_WireSyncReturn(
     WireSyncReturn ptr,
@@ -276,6 +369,13 @@ class RustWire implements FlutterRustBridgeWireBase {
 
 final class _Dart_Handle extends ffi.Opaque {}
 
+final class wire_uint_8_list extends ffi.Struct {
+  external ffi.Pointer<ffi.Uint8> ptr;
+
+  @ffi.Int32()
+  external int len;
+}
+
 typedef DartPostCObjectFnType = ffi.Pointer<
     ffi.NativeFunction<
         ffi.Bool Function(DartPort port_id, ffi.Pointer<ffi.Void> message)>>;
diff --git a/lib/main.dart b/lib/main.dart
index 5fd6261..e5e9caa 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -2,7 +2,6 @@ import 'package:desktop_webview_window/desktop_webview_window.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:starcitizen_doctor/base/ui_model.dart';
 import 'package:starcitizen_doctor/common/conf.dart';
-import 'package:starcitizen_doctor/common/rust/ffi.dart';
 import 'package:starcitizen_doctor/ui/index_ui_model.dart';
 import 'package:window_manager/window_manager.dart';
 
@@ -10,9 +9,6 @@ import 'global_ui_model.dart';
 import 'ui/index_ui.dart';
 
 void main(List<String> args) async {
-
-  dPrint("rust ffi ${await rustFii.platform()}");
-
   if (runWebViewTitleBarWidget(args,
       backgroundColor: const Color.fromRGBO(19, 36, 49, 1),
       builder: _defaultWebviewTitleBar)) {
diff --git a/lib/ui/tools/downloader/dio_range_download.dart b/lib/ui/tools/downloader/dio_range_download.dart
deleted file mode 100644
index 20f7674..0000000
--- a/lib/ui/tools/downloader/dio_range_download.dart
+++ /dev/null
@@ -1,163 +0,0 @@
-import 'dart:io';
-import 'package:dio/dio.dart';
-import 'package:starcitizen_doctor/base/ui.dart';
-
-/// https://github.com/qiaoshouqing/dio_range_download/blob/master/lib/dio_range_download.dart
-
-class RangeDownload {
-  static Future<Response> downloadWithChunks(
-    url,
-    savePath, {
-    bool isRangeDownload = true,
-    ProgressCallback? onReceiveProgress,
-    int maxChunk = 6,
-    Dio? dio,
-    CancelToken? cancelToken,
-  }) async {
-    const firstChunkSize = 102;
-
-    int total = 0;
-    if (dio == null) {
-      dio = Dio();
-      dio.options.connectTimeout = const Duration(seconds: 10);
-    }
-    var progress = <int>[];
-    var progressInit = <int>[];
-
-    Future mergeTempFiles(chunk) async {
-      File f = File(savePath + "temp0");
-      IOSink ioSink = f.openWrite(mode: FileMode.writeOnlyAppend);
-      for (int i = 1; i < chunk; ++i) {
-        File f0 = File(savePath + "temp$i");
-        await ioSink.addStream(f0.openRead());
-        await f0.delete();
-      }
-      await ioSink.close();
-      await f.rename(savePath);
-    }
-
-    Future mergeFiles(file1, file2, targetFile) async {
-      File f1 = File(file1);
-      File f2 = File(file2);
-      IOSink ioSink = f1.openWrite(mode: FileMode.writeOnlyAppend);
-      await ioSink.addStream(f2.openRead());
-      await f2.delete();
-      await ioSink.close();
-      await f1.rename(targetFile);
-    }
-
-    createCallback(no) {
-      return (int received, rangeTotal) async {
-        if (received >= rangeTotal) {
-          var path = savePath + "temp$no";
-          var oldPath = savePath + "temp${no}_pre";
-          File oldFile = File(oldPath);
-          if (oldFile.existsSync()) {
-            await mergeFiles(oldPath, path, path);
-          }
-        }
-        try {
-          progress[no] = progressInit[no] + received;
-        } catch (e) {
-          dPrint(e);
-        }
-        if (onReceiveProgress != null && total != 0) {
-          onReceiveProgress(progress.reduce((a, b) => a + b), total);
-        }
-      };
-    }
-
-    Future<Response> downloadChunk(url, start, end, no,
-        {isMerge = true}) async {
-      int initLength = 0;
-      --end;
-      var path = savePath + "temp$no";
-      File targetFile = File(path);
-      if (await targetFile.exists() && isMerge) {
-        dPrint("good job start:$start length:${File(path).lengthSync()}");
-        if (start + await targetFile.length() < end) {
-          initLength = await targetFile.length();
-          start += initLength;
-          var preFile = File(path + "_pre");
-          if (await preFile.exists()) {
-            initLength += await preFile.length();
-            start += await preFile.length();
-            await mergeFiles(preFile.path, targetFile.path, preFile.path);
-          } else {
-            await targetFile.rename(preFile.path);
-          }
-        } else {
-          await targetFile.delete();
-        }
-      }
-      progress.add(initLength);
-      progressInit.add(initLength);
-      return dio!.download(
-        url,
-        path,
-        deleteOnError: false,
-        onReceiveProgress: createCallback(no),
-        options: Options(
-          headers: {"range": "bytes=$start-$end"},
-        ),
-        cancelToken: cancelToken,
-      );
-    }
-
-    if (isRangeDownload) {
-      Response response =
-          await downloadChunk(url, 0, firstChunkSize, 0, isMerge: false);
-      if (response.statusCode == 206) {
-        dPrint("This http protocol support range download");
-        total = int.parse(response.headers
-            .value(HttpHeaders.contentRangeHeader)!
-            .split("/")
-            .last);
-        int reserved = total -
-            int.parse(response.headers.value(HttpHeaders.contentLengthHeader)!);
-        int chunk = (reserved / firstChunkSize).ceil() + 1;
-        if (chunk > 1) {
-          int chunkSize = firstChunkSize;
-          if (chunk > maxChunk + 1) {
-            chunk = maxChunk + 1;
-            chunkSize = (reserved / maxChunk).ceil();
-          }
-          var futures = <Future>[];
-          for (int i = 0; i < maxChunk; ++i) {
-            int start = firstChunkSize + i * chunkSize;
-            int end;
-            if (i == maxChunk - 1) {
-              end = total;
-            } else {
-              end = start + chunkSize;
-            }
-            futures.add(downloadChunk(url, start, end, i + 1));
-          }
-          await Future.wait(futures);
-        }
-        await mergeTempFiles(chunk);
-        return Response(
-          statusCode: 200,
-          statusMessage: "Download success.",
-          data: "Download success.",
-          requestOptions: RequestOptions(),
-        );
-      } else if (response.statusCode == 200) {
-        dPrint(
-            "The protocol does not support resumed downloads, and regular downloads will be used.");
-        return dio.download(url, savePath,
-            onReceiveProgress: onReceiveProgress,
-            cancelToken: cancelToken,
-            deleteOnError: false);
-      } else {
-        dPrint("The request encountered a problem, please handle it yourself");
-        return response;
-      }
-    } else {
-      return dio.download(url, savePath,
-          onReceiveProgress: onReceiveProgress,
-          cancelToken: cancelToken,
-          deleteOnError: false);
-    }
-  }
-}
diff --git a/lib/ui/tools/downloader/downloader_dialog_ui.dart b/lib/ui/tools/downloader/downloader_dialog_ui.dart
index 21c86d6..b70b766 100644
--- a/lib/ui/tools/downloader/downloader_dialog_ui.dart
+++ b/lib/ui/tools/downloader/downloader_dialog_ui.dart
@@ -54,7 +54,7 @@ class DownloaderDialogUI extends BaseUI<DownloaderDialogUIModel> {
 
   String getStatus(DownloaderDialogUIModel model) {
     if (model.progress == null && !model.isInMerging) return "准备中...";
-    if (model.isInMerging) return "正在合并文件...";
+    if (model.isInMerging) return "正在处理文件...";
     return "${model.progress?.toStringAsFixed(2) ?? "0"}%  ";
   }
 }
diff --git a/lib/ui/tools/downloader/downloader_dialog_ui_model.dart b/lib/ui/tools/downloader/downloader_dialog_ui_model.dart
index 6613dde..105c159 100644
--- a/lib/ui/tools/downloader/downloader_dialog_ui_model.dart
+++ b/lib/ui/tools/downloader/downloader_dialog_ui_model.dart
@@ -1,10 +1,8 @@
 import 'dart:io';
 
-import 'package:dio/dio.dart';
 import 'package:file_picker/file_picker.dart';
 import 'package:starcitizen_doctor/base/ui_model.dart';
-
-import 'dio_range_download.dart';
+import 'package:starcitizen_doctor/common/rust/ffi.dart';
 
 class DownloaderDialogUIModel extends BaseUIModel {
   final String fileName;
@@ -16,16 +14,12 @@ class DownloaderDialogUIModel extends BaseUIModel {
   DownloaderDialogUIModel(this.fileName, this.savePath, this.downloadUrl,
       {this.showChangeSavePathDialog = false, this.threadCount = 1});
 
-  CancelToken? downloadCancelToken;
-
-  int? downloadTaskId;
-
   bool isInMerging = false;
 
+  String? downloadTaskId;
+
   double? progress;
   int? speed;
-  DateTime? lastUpdateTime;
-  int? lastUpdateCount;
   int? count;
   int? total;
 
@@ -52,48 +46,66 @@ class DownloaderDialogUIModel extends BaseUIModel {
       savePath = userSelect;
       dPrint(savePath);
       notifyListeners();
-    } else {
-      savePath = "$savePath/$fileName";
     }
-    // start download
+
+    if (savePath.endsWith("\\$fileName")) {
+      savePath = savePath.substring(0, savePath.length - fileName.length - 1);
+    }
+
+    final downloaderSavePath = "$savePath//$fileName.downloading";
+
     try {
-      downloadCancelToken = CancelToken();
-      final r = await RangeDownload.downloadWithChunks(downloadUrl, savePath,
-          maxChunk: 10,
-          cancelToken: downloadCancelToken,
-          isRangeDownload: true, onReceiveProgress: (int count, int total) {
-        lastUpdateTime ??= DateTime.now();
-        if ((DateTime.now().difference(lastUpdateTime ?? DateTime.now()))
-                .inSeconds >=
-            1) {
-          lastUpdateTime = DateTime.now();
-          speed = (count - (lastUpdateCount ?? 0));
-          lastUpdateCount = count;
-          notifyListeners();
+      rustFii
+          .startDownload(
+              url: downloadUrl,
+              savePath: savePath,
+              fileName: "$fileName.downloading",
+              connectionCount: 10)
+          .listen((event) async {
+        dPrint(
+            "id == ${event.id} p ==${event.progress} t==${event.total} s==${event.speed} st==${event.status}");
+
+        downloadTaskId = event.id;
+        count = event.progress;
+        if (event.total != 0) {
+          total = event.total;
         }
-        this.count = count;
-        this.total = total;
-        progress = count / total * 100;
-        if (count == total) {
-          isInMerging = true;
+        speed = event.speed;
+        if (total != null && total != 0 && event.progress != 0) {
+          progress = (event.progress / total!) * 100;
         }
         notifyListeners();
+
+        if (progress != null &&
+            progress != 0 &&
+            event.status == const MyDownloaderStatus.noStart()) {
+          Navigator.pop(context!, "cancel");
+          return;
+        }
+
+        if (event.status == const MyDownloaderStatus.finished()) {
+          count = total;
+          isInMerging = true;
+          notifyListeners();
+          await File(downloaderSavePath)
+              .rename(downloaderSavePath.replaceAll(".downloading", ""));
+          final bsonFile = File("$downloaderSavePath.bson");
+          if (await bsonFile.exists()) {
+            bsonFile.delete();
+          }
+          Navigator.pop(context!, "$savePath\\$fileName");
+        }
       });
-      if (r.statusCode == 200) {
-        Navigator.pop(context!, savePath);
-      }
     } catch (e) {
-      if (e is DioException && e.type != DioExceptionType.cancel) {
-        Navigator.pop(context!, e);
-      }
+      Navigator.pop(context!, e);
     }
   }
 
   doCancel() {
     try {
-      downloadCancelToken?.cancel();
-      downloadCancelToken = null;
+      if (downloadTaskId != null) {
+        rustFii.cancelDownload(id: downloadTaskId!);
+      }
     } catch (_) {}
-    Navigator.pop(context!, "cancel");
   }
 }
diff --git a/lib/ui/tools/tools_ui_model.dart b/lib/ui/tools/tools_ui_model.dart
index 80123cc..6cceaf3 100644
--- a/lib/ui/tools/tools_ui_model.dart
+++ b/lib/ui/tools/tools_ui_model.dart
@@ -333,7 +333,7 @@ class ToolsUIModel extends BaseUIModel {
   }
 
   Future<void> _downloadP4k() async {
-    final downloadUrl = AppConf.networkVersionData?.p4kDownloadUrl;
+    var downloadUrl = AppConf.networkVersionData?.p4kDownloadUrl;
     if (downloadUrl == null || downloadUrl.isEmpty) {
       showToast(context!, "该功能维护中，请稍后再试！");
       return;
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index d44af96..051e52a 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -8,4 +8,9 @@ crate-type = ["staticlib", "cdylib"]
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-flutter_rust_bridge = "1"
\ No newline at end of file
+flutter_rust_bridge = "1"
+http-downloader = { version = "0.3.2", features = ["status-tracker", "speed-tracker", "breakpoint-resume", "bson-file-archiver"] }
+tokio = { version = "1", features = ["rt", "rt-multi-thread", "macros"] }
+url = "2.4.1"
+uuid = { version = "1.5.0", features = ["v4", "fast-rng", "macro-diagnostics"] }
+async-std = "1.12.0"
diff --git a/rust/src/api.rs b/rust/src/api.rs
index d39e2a9..e0a9802 100644
--- a/rust/src/api.rs
+++ b/rust/src/api.rs
@@ -1,63 +1,16 @@
-// This is the entry point of your Rust library.
-// When adding new code to your project, note that only items used
-// here will be transformed to their Dart equivalents.
+use std::sync::Arc;
+use async_std::task;
+use flutter_rust_bridge::StreamSink;
+use crate::downloader::{do_cancel_download, do_start_download, DownloadCallbackData};
 
-// A plain enum without any fields. This is similar to Dart- or C-style enums.
-// flutter_rust_bridge is capable of generating code for enums with fields
-// (@freezed classes in Dart and tagged unions in C).
-pub enum Platform {
-    Unknown,
-    Android,
-    Ios,
-    Windows,
-    Unix,
-    MacIntel,
-    MacApple,
-    Wasm,
+pub fn ping() -> String {
+    return String::from("PONG");
 }
 
-// A function definition in Rust. Similar to Dart, the return type must always be named
-// and is never inferred.
-pub fn platform() -> Platform {
-    // This is a macro, a special expression that expands into code. In Rust, all macros
-    // end with an exclamation mark and can be invoked with all kinds of brackets (parentheses,
-    // brackets and curly braces). However, certain conventions exist, for example the
-    // vector macro is almost always invoked as vec![..].
-    //
-    // The cfg!() macro returns a boolean value based on the current compiler configuration.
-    // When attached to expressions (#[cfg(..)] form), they show or hide the expression at compile time.
-    // Here, however, they evaluate to runtime values, which may or may not be optimized out
-    // by the compiler. A variety of configurations are demonstrated here which cover most of
-    // the modern oeprating systems. Try running the Flutter application on different machines
-    // and see if it matches your expected OS.
-    //
-    // Furthermore, in Rust, the last expression in a function is the return value and does
-    // not have the trailing semicolon. This entire if-else chain forms a single expression.
-    if cfg!(windows) {
-        Platform::Windows
-    } else if cfg!(target_os = "android") {
-        Platform::Android
-    } else if cfg!(target_os = "ios") {
-        Platform::Ios
-    } else if cfg!(all(target_os = "macos", target_arch = "aarch64")) {
-        Platform::MacApple
-    } else if cfg!(target_os = "macos") {
-        Platform::MacIntel
-    } else if cfg!(target_family = "wasm") {
-        Platform::Wasm
-    } else if cfg!(unix) {
-        Platform::Unix
-    } else {
-        Platform::Unknown
-    }
+pub fn start_download(url: String, save_path: String, file_name: String, connection_count: u8, sink: StreamSink<DownloadCallbackData>) {
+    let _ = do_start_download(url, save_path, file_name, connection_count, Arc::new(sink));
 }
 
-pub fn add(left: usize, right: usize) -> usize {
-    left + right
-}
-
-// The convention for Rust identifiers is the snake_case,
-// and they are automatically converted to camelCase on the Dart side.
-pub fn rust_release_mode() -> bool {
-    cfg!(not(debug_assertions))
+pub fn cancel_download(id: String) {
+    task::block_on(do_cancel_download(&id))
 }
\ No newline at end of file
diff --git a/rust/src/bridge_generated.io.rs b/rust/src/bridge_generated.io.rs
index f89e5e0..8317adb 100644
--- a/rust/src/bridge_generated.io.rs
+++ b/rust/src/bridge_generated.io.rs
@@ -2,28 +2,65 @@ use super::*;
 // Section: wire functions
 
 #[no_mangle]
-pub extern "C" fn wire_platform(port_: i64) {
-    wire_platform_impl(port_)
+pub extern "C" fn wire_ping(port_: i64) {
+    wire_ping_impl(port_)
 }
 
 #[no_mangle]
-pub extern "C" fn wire_add(port_: i64, left: usize, right: usize) {
-    wire_add_impl(port_, left, right)
+pub extern "C" fn wire_start_download(
+    port_: i64,
+    url: *mut wire_uint_8_list,
+    save_path: *mut wire_uint_8_list,
+    file_name: *mut wire_uint_8_list,
+    connection_count: u8,
+) {
+    wire_start_download_impl(port_, url, save_path, file_name, connection_count)
 }
 
 #[no_mangle]
-pub extern "C" fn wire_rust_release_mode(port_: i64) {
-    wire_rust_release_mode_impl(port_)
+pub extern "C" fn wire_cancel_download(port_: i64, id: *mut wire_uint_8_list) {
+    wire_cancel_download_impl(port_, id)
 }
 
 // Section: allocate functions
 
+#[no_mangle]
+pub extern "C" fn new_uint_8_list_0(len: i32) -> *mut wire_uint_8_list {
+    let ans = wire_uint_8_list {
+        ptr: support::new_leak_vec_ptr(Default::default(), len),
+        len,
+    };
+    support::new_leak_box_ptr(ans)
+}
+
 // Section: related functions
 
 // Section: impl Wire2Api
 
+impl Wire2Api<String> for *mut wire_uint_8_list {
+    fn wire2api(self) -> String {
+        let vec: Vec<u8> = self.wire2api();
+        String::from_utf8_lossy(&vec).into_owned()
+    }
+}
+
+impl Wire2Api<Vec<u8>> for *mut wire_uint_8_list {
+    fn wire2api(self) -> Vec<u8> {
+        unsafe {
+            let wrap = support::box_from_leak_ptr(self);
+            support::vec_from_leak_ptr(wrap.ptr, wrap.len)
+        }
+    }
+}
 // Section: wire structs
 
+#[repr(C)]
+#[derive(Clone)]
+pub struct wire_uint_8_list {
+    ptr: *mut u8,
+    len: i32,
+}
+
 // Section: impl NewWithNullPtr
 
 pub trait NewWithNullPtr {
diff --git a/rust/src/bridge_generated.io.rs.bk b/rust/src/bridge_generated.io.rs.bk
deleted file mode 100644
index d704f0e..0000000
--- a/rust/src/bridge_generated.io.rs.bk
+++ /dev/null
@@ -1,43 +0,0 @@
-use super::*;
-// Section: wire functions
-
-
-                #[no_mangle]
-                pub extern "C" fn wire_add(port_: i64,left: usize,right: usize)  {
-                    wire_add_impl(port_,left,right)
-                }
-            
-// Section: allocate functions
-
-
-// Section: related functions
-
-
-// Section: impl Wire2Api
-
-
-// Section: wire structs
-
-
-
-// Section: impl NewWithNullPtr
-
-pub trait NewWithNullPtr {
-            fn new_with_null_ptr() -> Self;
-        }
-
-        impl<T> NewWithNullPtr for *mut T {
-            fn new_with_null_ptr() -> Self {
-                std::ptr::null_mut()
-            }
-        }
-        
-
-// Section: sync execution mode utility
-
-
-                #[no_mangle]
-                pub extern "C" fn free_WireSyncReturn(ptr: support::WireSyncReturn)  {
-                    unsafe { let _ = support::box_from_leak_ptr(ptr); };
-                }
-            
\ No newline at end of file
diff --git a/rust/src/bridge_generated.rs b/rust/src/bridge_generated.rs
index bd8921b..824fde1 100644
--- a/rust/src/bridge_generated.rs
+++ b/rust/src/bridge_generated.rs
@@ -20,46 +20,65 @@ use std::sync::Arc;
 
 // Section: imports
 
+use crate::downloader::DownloadCallbackData;
+use crate::downloader::MyDownloaderStatus;
+use crate::downloader::MyNetworkItemPendingType;
+
 // Section: wire functions
 
-fn wire_platform_impl(port_: MessagePort) {
-    FLUTTER_RUST_BRIDGE_HANDLER.wrap::<_, _, _, Platform, _>(
+fn wire_ping_impl(port_: MessagePort) {
+    FLUTTER_RUST_BRIDGE_HANDLER.wrap::<_, _, _, String, _>(
         WrapInfo {
-            debug_name: "platform",
+            debug_name: "ping",
             port: Some(port_),
             mode: FfiCallMode::Normal,
         },
-        move || move |task_callback| Result::<_, ()>::Ok(platform()),
+        move || move |task_callback| Result::<_, ()>::Ok(ping()),
     )
 }
-fn wire_add_impl(
+fn wire_start_download_impl(
     port_: MessagePort,
-    left: impl Wire2Api<usize> + UnwindSafe,
-    right: impl Wire2Api<usize> + UnwindSafe,
+    url: impl Wire2Api<String> + UnwindSafe,
+    save_path: impl Wire2Api<String> + UnwindSafe,
+    file_name: impl Wire2Api<String> + UnwindSafe,
+    connection_count: impl Wire2Api<u8> + UnwindSafe,
 ) {
-    FLUTTER_RUST_BRIDGE_HANDLER.wrap::<_, _, _, usize, _>(
+    FLUTTER_RUST_BRIDGE_HANDLER.wrap::<_, _, _, (), _>(
         WrapInfo {
-            debug_name: "add",
+            debug_name: "start_download",
+            port: Some(port_),
+            mode: FfiCallMode::Stream,
+        },
+        move || {
+            let api_url = url.wire2api();
+            let api_save_path = save_path.wire2api();
+            let api_file_name = file_name.wire2api();
+            let api_connection_count = connection_count.wire2api();
+            move |task_callback| {
+                Result::<_, ()>::Ok(start_download(
+                    api_url,
+                    api_save_path,
+                    api_file_name,
+                    api_connection_count,
+                    task_callback.stream_sink::<_, DownloadCallbackData>(),
+                ))
+            }
+        },
+    )
+}
+fn wire_cancel_download_impl(port_: MessagePort, id: impl Wire2Api<String> + UnwindSafe) {
+    FLUTTER_RUST_BRIDGE_HANDLER.wrap::<_, _, _, (), _>(
+        WrapInfo {
+            debug_name: "cancel_download",
             port: Some(port_),
             mode: FfiCallMode::Normal,
         },
         move || {
-            let api_left = left.wire2api();
-            let api_right = right.wire2api();
-            move |task_callback| Result::<_, ()>::Ok(add(api_left, api_right))
+            let api_id = id.wire2api();
+            move |task_callback| Result::<_, ()>::Ok(cancel_download(api_id))
         },
     )
 }
-fn wire_rust_release_mode_impl(port_: MessagePort) {
-    FLUTTER_RUST_BRIDGE_HANDLER.wrap::<_, _, _, bool, _>(
-        WrapInfo {
-            debug_name: "rust_release_mode",
-            port: Some(port_),
-            mode: FfiCallMode::Normal,
-        },
-        move || move |task_callback| Result::<_, ()>::Ok(rust_release_mode()),
-    )
-}
 // Section: wrapper structs
 
 // Section: static checks
@@ -82,30 +101,66 @@ where
         (!self.is_null()).then(|| self.wire2api())
     }
 }
-impl Wire2Api<usize> for usize {
-    fn wire2api(self) -> usize {
+
+impl Wire2Api<u8> for u8 {
+    fn wire2api(self) -> u8 {
         self
     }
 }
+
 // Section: impl IntoDart
 
-impl support::IntoDart for Platform {
+impl support::IntoDart for DownloadCallbackData {
+    fn into_dart(self) -> support::DartAbi {
+        vec![
+            self.id.into_into_dart().into_dart(),
+            self.total.into_into_dart().into_dart(),
+            self.progress.into_into_dart().into_dart(),
+            self.speed.into_into_dart().into_dart(),
+            self.status.into_into_dart().into_dart(),
+        ]
+        .into_dart()
+    }
+}
+impl support::IntoDartExceptPrimitive for DownloadCallbackData {}
+impl rust2dart::IntoIntoDart<DownloadCallbackData> for DownloadCallbackData {
+    fn into_into_dart(self) -> Self {
+        self
+    }
+}
+
+impl support::IntoDart for MyDownloaderStatus {
     fn into_dart(self) -> support::DartAbi {
         match self {
-            Self::Unknown => 0,
-            Self::Android => 1,
-            Self::Ios => 2,
-            Self::Windows => 3,
-            Self::Unix => 4,
-            Self::MacIntel => 5,
-            Self::MacApple => 6,
-            Self::Wasm => 7,
+            Self::NoStart => vec![0.into_dart()],
+            Self::Running => vec![1.into_dart()],
+            Self::Pending(field0) => vec![2.into_dart(), field0.into_into_dart().into_dart()],
+            Self::Error(field0) => vec![3.into_dart(), field0.into_into_dart().into_dart()],
+            Self::Finished => vec![4.into_dart()],
         }
         .into_dart()
     }
 }
-impl support::IntoDartExceptPrimitive for Platform {}
-impl rust2dart::IntoIntoDart<Platform> for Platform {
+impl support::IntoDartExceptPrimitive for MyDownloaderStatus {}
+impl rust2dart::IntoIntoDart<MyDownloaderStatus> for MyDownloaderStatus {
+    fn into_into_dart(self) -> Self {
+        self
+    }
+}
+
+impl support::IntoDart for MyNetworkItemPendingType {
+    fn into_dart(self) -> support::DartAbi {
+        match self {
+            Self::QueueUp => 0,
+            Self::Starting => 1,
+            Self::Stopping => 2,
+            Self::Initializing => 3,
+        }
+        .into_dart()
+    }
+}
+impl support::IntoDartExceptPrimitive for MyNetworkItemPendingType {}
+impl rust2dart::IntoIntoDart<MyNetworkItemPendingType> for MyNetworkItemPendingType {
     fn into_into_dart(self) -> Self {
         self
     }
diff --git a/rust/src/downloader/mod.rs b/rust/src/downloader/mod.rs
new file mode 100644
index 0000000..fa20465
--- /dev/null
+++ b/rust/src/downloader/mod.rs
@@ -0,0 +1,183 @@
+use std::collections::HashMap;
+use std::error::Error;
+use std::num::{NonZeroU8, NonZeroUsize};
+use std::path::PathBuf;
+use std::sync::Arc;
+use std::time::Duration;
+use async_std::sync::Mutex;
+use http_downloader::{breakpoint_resume::DownloadBreakpointResumeExtension, ExtendedHttpFileDownloader, HttpDownloaderBuilder, speed_tracker::DownloadSpeedTrackerExtension, status_tracker::DownloadStatusTrackerExtension};
+use http_downloader::bson_file_archiver::{ArchiveFilePath, BsonFileArchiverBuilder};
+use url::Url;
+use flutter_rust_bridge::StreamSink;
+use flutter_rust_bridge::support::lazy_static;
+use http_downloader::status_tracker::{DownloaderStatus, NetworkItemPendingType};
+use uuid::Uuid;
+
+pub enum MyNetworkItemPendingType {
+    QueueUp,
+    Starting,
+    Stopping,
+    Initializing,
+}
+
+pub enum MyDownloaderStatus {
+    NoStart,
+    Running,
+    Pending(MyNetworkItemPendingType),
+    Error(String),
+    Finished,
+}
+
+pub struct DownloadCallbackData {
+    pub id: String,
+    pub total: u64,
+    pub progress: u64,
+    pub speed: u64,
+    pub status: MyDownloaderStatus,
+}
+
+impl DownloadCallbackData {
+    pub fn new(id: String, total: u64) -> Self {
+        DownloadCallbackData {
+            id,
+            total,
+            progress: 0,
+            speed: 0,
+            status: MyDownloaderStatus::NoStart,
+        }
+    }
+}
+
+lazy_static! {
+        static ref DOWNLOADERS_MAP: Mutex<HashMap<String, Arc<ExtendedHttpFileDownloader>>> = {
+            let map = HashMap::new();
+            Mutex::new(map)
+        };
+}
+
+pub async fn do_cancel_download(id: &str) {
+    let d = get_downloader(id).await;
+    if d.is_none() {
+        return;
+    }
+    d.unwrap().cancel().await
+}
+
+#[tokio::main]
+pub async fn do_start_download(url: String, save_path: String, file_name: String, connection_count: u8, sink: Arc<StreamSink<DownloadCallbackData>>) -> Result<(), Box<dyn Error>> {
+    let save_dir = PathBuf::from(save_path);
+    let test_url = Url::parse(&*url)?;
+
+    let (mut downloader, (status_state, speed_state, ..)) =
+
+        HttpDownloaderBuilder::new(test_url, save_dir)
+            .chunk_size(NonZeroUsize::new(1024 * 1024 * 10).unwrap()) // 块大小
+            .download_connection_count(NonZeroU8::new(connection_count).unwrap())
+            .file_name(Option::from(file_name))
+            .build((
+                // 下载状态追踪扩展
+                // by cargo feature "status-tracker" enable
+                DownloadStatusTrackerExtension { log: true },
+                // 下载速度追踪扩展
+                // by cargo feature "speed-tracker" enable
+                DownloadSpeedTrackerExtension { log: true },
+                // 断点续传扩展，
+                // by cargo feature "breakpoint-resume" enable
+                DownloadBreakpointResumeExtension {
+                    // BsonFileArchiver by cargo feature "bson-file-archiver" enable
+                    download_archiver_builder: BsonFileArchiverBuilder::new(ArchiveFilePath::Suffix("bson".to_string()))
+                }
+            ));
+
+    let status_state_arc = Arc::new(status_state);
+    let status_state_clone = Arc::clone(&status_state_arc);
+
+    let id = Uuid::new_v4();
+    // info!("Prepare download，准备下载");
+    let download_future = downloader.prepare_download()?;
+    let sink_clone = sink.clone();
+    add_downloader(&id.to_string(), Arc::new(downloader)).await;
+
+    // 打印下载进度
+    // Print download Progress
+    tokio::spawn({
+        let mut downloaded_len_receiver = get_downloader(&id.to_string()).await.unwrap().downloaded_len_receiver().clone();
+        let total_size_future = get_downloader(&id.to_string()).await.unwrap().total_size_future();
+        async move {
+            let total_len = total_size_future.await;
+            if let Some(total_len) = total_len {
+                // info!("Total size: {:.2} Mb",total_len.get() as f64 / 1024_f64/ 1024_f64);
+                sink_clone.add(DownloadCallbackData::new(id.to_string(), total_len.get()));
+            }
+
+            while downloaded_len_receiver.changed().await.is_ok() {
+                let p = *downloaded_len_receiver.borrow();
+                let _status = status_state_clone.status(); // get download status， 获取状态
+                let _byte_per_second = speed_state.download_speed(); // get download speed，Byte per second，获取速度，字节每秒
+
+                if let Some(total_len) = total_len {
+                    sink_clone.add(DownloadCallbackData {
+                        id: id.to_string(),
+                        total: total_len.get(),
+                        progress: p,
+                        speed: _byte_per_second,
+                        status: get_my_status(_status),
+                    });
+                }
+                tokio::time::sleep(Duration::from_millis(100)).await;
+            }
+        }
+    });
+
+    download_future.await?;
+    let _status = status_state_arc.status();
+    sink.add(DownloadCallbackData {
+        id: id.to_string(),
+        total: 0,
+        progress: 0,
+        speed: 0,
+        status: get_my_status(_status),
+    });
+    sink.close();
+    remove_downloader(&id.to_string()).await;
+    println!("rust downloader download complete");
+    Ok(())
+}
+
+async fn remove_downloader(id: &str) {
+    let mut downloader_map = DOWNLOADERS_MAP.lock().await;
+    downloader_map.remove(id);
+}
+
+async fn get_downloader(id: &str) -> Option<Arc<ExtendedHttpFileDownloader>> {
+    let downloader_map = DOWNLOADERS_MAP.lock().await;
+    return if let Some(downloader) = downloader_map.get(id) {
+        Some(downloader.clone())
+    } else {
+        None
+    };
+}
+
+async fn add_downloader(id: &str, d: Arc<ExtendedHttpFileDownloader>) {
+    let mut downloader_map = DOWNLOADERS_MAP.lock().await;
+    downloader_map.insert(id.to_string(), d);
+}
+
+fn get_my_status(_status: DownloaderStatus) -> MyDownloaderStatus {
+    match _status {
+        DownloaderStatus::NoStart => { MyDownloaderStatus::NoStart }
+        DownloaderStatus::Running => { MyDownloaderStatus::Running }
+        DownloaderStatus::Pending(n) => { MyDownloaderStatus::Pending(get_my_network_type(n)) }
+        DownloaderStatus::Error(e) => { MyDownloaderStatus::Error(e) }
+        DownloaderStatus::Finished => { MyDownloaderStatus::Finished }
+    }
+}
+
+fn get_my_network_type(n: NetworkItemPendingType) -> MyNetworkItemPendingType {
+    match n {
+        NetworkItemPendingType::QueueUp => { MyNetworkItemPendingType::QueueUp }
+        NetworkItemPendingType::Starting => { MyNetworkItemPendingType::Starting }
+        NetworkItemPendingType::Stopping => { MyNetworkItemPendingType::Stopping }
+        NetworkItemPendingType::Initializing => { MyNetworkItemPendingType::Initializing }
+    }
+}
\ No newline at end of file
diff --git a/rust/src/lib.rs b/rust/src/lib.rs
index bde602f..49c0daa 100644
--- a/rust/src/lib.rs
+++ b/rust/src/lib.rs
@@ -1,2 +1,3 @@
 mod api;
-mod bridge_generated; /* AUTO INJECTED BY flutter_rust_bridge. This line may not be accurate, and you can change it according to your needs. */
+mod bridge_generated;
+mod downloader;