fix web save

2025-07-22 21:54:09 +08:00
parent 4859d0cf7e
commit ca5a552371
8 changed files with 74 additions and 14 deletions
--- a/lib/ui/widgets/book_detail_view.dart
+++ b/lib/ui/widgets/book_detail_view.dart
@@ -8,6 +8,7 @@ import 'dart:io' show Platform , File, Directory;
 import 'package:path/path.dart' as p;
 import 'package:path_provider/path_provider.dart';
 import 'package:permission_handler/permission_handler.dart';
+import 'package:file_saver/file_saver.dart';

 import '../../core/book_downloader.dart';
 import '../../models/book.dart';
@@ -58,7 +59,9 @@ class _BookDetailViewState extends ConsumerState<BookDetailView> {
        }
      }
    } catch (err) {
-      print("获取下载文件夹路径失败: $err");
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('无法获取下载目录')),
+      );
    }
    return directory?.path;
  }
@@ -70,7 +73,30 @@ class _BookDetailViewState extends ConsumerState<BookDetailView> {
    final bool isIOS = !kIsWeb && Platform.isIOS;

    try {
-      if (isAndroid || isIOS) {
+      if (kIsWeb) {
+        // --- Web 平台逻辑 ---
+        if (_selectedFormat == DownloadFormat.chapterTxt) {
+          showDialog(
+            context: context,
+            builder: (context) => AlertDialog(
+              title: const Text('不支持分章节下载'),
+              content: const Text('Web 平台不支持分章节下载，请选择单文件下载。'),
+              actions: [
+                TextButton(
+                  child: const Text('确定'),
+                  onPressed: () => Navigator.of(context).pop(),
+                ),
+              ],
+            ),
+          );
+          return;
+        } else {
+          // 获取一个虚拟的、在内存中的目录路径
+          final Directory tempDir = await getApplicationDocumentsDirectory();
+          String extension = _selectedFormat == DownloadFormat.singleTxt ? 'txt' : 'epub';
+          outputPath = '${tempDir.path}/$fileName.$extension';
+        }
+      } else if (isAndroid || isIOS) {
        // --- 移动平台 (Android/iOS) 逻辑 ---
        var hasPermission = true;
        if (isAndroid) {
@@ -154,21 +180,35 @@ class _BookDetailViewState extends ConsumerState<BookDetailView> {

          // --- 解决方案: 创建一个局部 final 变量来捕获当前路径的值 ---
          final String path = _lastDownloadedPath!;
+          final String fileName = p.basename(path); // 从完整路径中提取文件名

          // 显示 SnackBar
-          ScaffoldMessenger.of(context).showSnackBar(
-              SnackBar(
-                // 使用局部变量 'path'
-                content: Text('下载完成: $path'),
-                action: _selectedFormat != DownloadFormat.chapterTxt
-                    ? SnackBarAction(
-                  label: '打开',
-                  // 回调函数现在捕获的是局部变量 'path'，它的值不会被改变
-                  onPressed: () => OpenFile.open(path),
+          if (kIsWeb) {
+            // --- Web 平台: 读取虚拟文件并触发浏览器下载 ---
+            final File file = File(path);
+            file.readAsBytes().then((bytes) {
+              // 使用 file_saver 保存文件
+              FileSaver.instance.saveFile(
+                name: p.basenameWithoutExtension(fileName), // 文件名 (无扩展名)
+                bytes: bytes,                                // 文件内容
+                fileExtension: p.extension(fileName).replaceFirst('.', ''), // 扩展名 (去掉点)
+                mimeType: MimeType.text
+              );
+            });
+          } else {
+            // --- 移动/桌面平台: 显示带“打开”按钮的 SnackBar ---
+            ScaffoldMessenger.of(context).showSnackBar(
+                SnackBar(
+                  content: Text('下载完成: $path'),
+                  action: _selectedFormat != DownloadFormat.chapterTxt
+                      ? SnackBarAction(
+                    label: '打开',
+                    onPressed: () => OpenFile.open(path),
+                  )
+                      : null,
                )
-                    : null,
-              )
-          );
+            );
+          }
          // 现在可以安全地清空成员变量，为下一次下载做准备了
          _lastDownloadedPath = null;
        }
--- a/linux/flutter/generated_plugin_registrant.cc
+++ b/linux/flutter/generated_plugin_registrant.cc
@@ -6,11 +6,15 @@

 #include "generated_plugin_registrant.h"

+#include <file_saver/file_saver_plugin.h>
 #include <open_file_linux/open_file_linux_plugin.h>
 #include <url_launcher_linux/url_launcher_plugin.h>
 #include <window_size/window_size_plugin.h>

 void fl_register_plugins(FlPluginRegistry* registry) {
+  g_autoptr(FlPluginRegistrar) file_saver_registrar =
+      fl_plugin_registry_get_registrar_for_plugin(registry, "FileSaverPlugin");
+  file_saver_plugin_register_with_registrar(file_saver_registrar);
  g_autoptr(FlPluginRegistrar) open_file_linux_registrar =
      fl_plugin_registry_get_registrar_for_plugin(registry, "OpenFileLinuxPlugin");
  open_file_linux_plugin_register_with_registrar(open_file_linux_registrar);
--- a/linux/flutter/generated_plugins.cmake
+++ b/linux/flutter/generated_plugins.cmake
@@ -3,6 +3,7 @@
 #

 list(APPEND FLUTTER_PLUGIN_LIST
+  file_saver
  open_file_linux
  url_launcher_linux
  window_size
--- a/macos/Flutter/GeneratedPluginRegistrant.swift
+++ b/macos/Flutter/GeneratedPluginRegistrant.swift
@@ -6,6 +6,7 @@ import FlutterMacOS
 import Foundation

 import file_picker
+import file_saver
 import open_file_mac
 import package_info_plus
 import path_provider_foundation
@@ -14,6 +15,7 @@ import window_size

 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
  FilePickerPlugin.register(with: registry.registrar(forPlugin: "FilePickerPlugin"))
+  FileSaverPlugin.register(with: registry.registrar(forPlugin: "FileSaverPlugin"))
  OpenFilePlugin.register(with: registry.registrar(forPlugin: "OpenFilePlugin"))
  FPPPackageInfoPlusPlugin.register(with: registry.registrar(forPlugin: "FPPPackageInfoPlusPlugin"))
  PathProviderPlugin.register(with: registry.registrar(forPlugin: "PathProviderPlugin"))
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -169,6 +169,14 @@ packages:
      url: "https://pub.flutter-io.cn"
    source: hosted
    version: "10.2.0"
+  file_saver:
+    dependency: "direct main"
+    description:
+      name: file_saver
+      sha256: "9d93db09bd4da9e43238f9dd485360fc51a5c138eea5ef5f407ec56e58079ac0"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.3.1"
  flutter:
    dependency: "direct main"
    description: flutter
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -48,6 +48,7 @@ dependencies:
  # 文件与权限
  path_provider: ^2.1.1        # 获取设备文件系统路径
  file_picker: ^10.2.0         # 允许用户选择保存位置
+  file_saver: ^0.3.1           # 用于在web端保存文件
  permission_handler: ^12.0.1  # 处理存储权限 (尤其在 Android)
  open_file: ^3.5.10

--- a/windows/flutter/generated_plugin_registrant.cc
+++ b/windows/flutter/generated_plugin_registrant.cc
@@ -6,11 +6,14 @@

 #include "generated_plugin_registrant.h"

+#include <file_saver/file_saver_plugin.h>
 #include <permission_handler_windows/permission_handler_windows_plugin.h>
 #include <url_launcher_windows/url_launcher_windows.h>
 #include <window_size/window_size_plugin.h>

 void RegisterPlugins(flutter::PluginRegistry* registry) {
+  FileSaverPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("FileSaverPlugin"));
  PermissionHandlerWindowsPluginRegisterWithRegistrar(
      registry->GetRegistrarForPlugin("PermissionHandlerWindowsPlugin"));
  UrlLauncherWindowsRegisterWithRegistrar(
--- a/windows/flutter/generated_plugins.cmake
+++ b/windows/flutter/generated_plugins.cmake
@@ -3,6 +3,7 @@
 #

 list(APPEND FLUTTER_PLUGIN_LIST
+  file_saver
  permission_handler_windows
  url_launcher_windows
  window_size