缓存逻辑调整

lib/config/cache.dart

@@ -1,8 +1,11 @@
 // 是否启用缓存
-const CacheEnable = false;
+const CacheEnable = true;
 
 // 缓存的最长时间，单位（秒）
 const CacheMaxAge = 1000;
 
+
+const DiskCacheMaxAge = 6000;
+
 // 最大缓存数
-const CacheMaxCount = 100;
+const CacheMaxCount = 30;

lib/data/services/storage.dart

@@ -13,6 +13,10 @@ class StorageService extends GetxService {
     return this;
   }
 
+  Future<bool> clear() async {
+    return await _prefs.clear();
+  }
+
   Future<bool> setString(String key, String value) async {
     return await _prefs.setString(key, value);
   }

lib/modules/account/account_page.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
 import 'package:get/get.dart';
 import 'package:news_getx/data/services/config.dart';
+import 'package:news_getx/data/services/storage.dart';
 import 'package:news_getx/data/services/user.dart';
 import 'package:news_getx/modules/widgets/button.dart';
 import 'package:news_getx/theme/app_colors.dart';
@@ -188,6 +189,16 @@ class AccountPage extends GetView<AccountController> {
               ConfigService.to.changeGrayTheme();
             },
           ),
+          _buildCell(
+            title: "Clear disk cache",
+            hasArrow: true,
+            onTap: () async {
+              bool success = await StorageService.to.clear();
+              if (success) {
+                Get.snackbar("提示", "缓存清除完成！");
+              }
+            },
+          ),
           _buildCell(
             title: "Log out",
             hasArrow: true,

lib/modules/main/main_controller.dart

@@ -19,7 +19,7 @@ class MainController extends GetxController {
   /// 方法
   // 拉取数据
   asyncLoadAllData() async {
-    // todo 因为缓存导致这两项无法刷新 得找个地方刷新或者调整逻辑 例如缓存加超时
+    // todo 因为磁盘缓存导致这两项无法刷新 得找个地方刷新或者调整逻辑 例如磁盘缓存加超时
     state.categories = await newsRepository.categories(cacheDisk: true);
     state.channels = await newsRepository.channels(cacheDisk: true);
     // 分类对应的数据（推荐、新闻）

lib/utils/http.dart

@@ -219,7 +219,7 @@ class HttpUtil {
     bool refresh = false,
     bool noCache = !CacheEnable,
     bool list = false,
-    String cacheKey = '',
+    String? cacheKey,
     bool cacheDisk = false,
   }) async {
     Options requestOptions = options ?? Options();
@@ -241,7 +241,7 @@ class HttpUtil {
     var response = await dio.get(
       path,
       queryParameters: queryParameters,
-      options: options,
+      options: requestOptions,
       cancelToken: cancelToken,
     );
     return response.data;

lib/utils/net_cache.dart

@@ -1,4 +1,4 @@
-import 'dart:collection';
+import 'dart:convert';
 
 import 'package:dio/dio.dart';
 import 'package:news_getx/config/cache.dart';
@@ -53,7 +53,6 @@ class NetCache extends Interceptor {
     if (options.extra['noCache'] != true &&
         options.method.toLowerCase() == "get") {
       String key = options.extra['cacheKey'] ?? options.uri.toString();
-
       // 策略 1 内存缓存优先，2 然后才是磁盘缓存
       var ob = cache[key];
       // 1 内存缓存
@@ -63,6 +62,7 @@ class NetCache extends Interceptor {
             CacheMaxAge) {
           CacheObject? cacheRes = cache[key];
           if (cacheRes != null) {
+            // print('命中内存缓存： $key');
             handler.resolve(cacheRes.response);
             return;
           }
@@ -75,9 +75,22 @@ class NetCache extends Interceptor {
       // 2 磁盘缓存
       if (cacheDisk) {
         var cacheData = StorageService.to.getJSON(key);
-        if (cacheData) {
+        if (cacheData != null) {
-          handler.resolve(cacheData.response);
+          // 若缓存未过期，则返回缓存内容
+          if ((DateTime.now().millisecondsSinceEpoch - cacheData['timestamp']) / 1000 <
+              DiskCacheMaxAge) {
+            handler.resolve(
+              Response(
+                requestOptions: options,
+                statusCode: 200,
+                data: cacheData['data'],
+              ),
+            );
             return;
+          } else {
+            //若已过期则删除缓存，继续向服务器请求
+            StorageService.to.remove(key);
+          }
         }
       }
     }
@@ -108,9 +121,13 @@ class NetCache extends Interceptor {
 
       // 磁盘缓存
       if (options.extra["cacheDisk"] == true) {
-         StorageService.to.setJSON(key, CacheObject(response));
+        final diskData = <String, dynamic>{
+          "timestamp": DateTime.now().millisecondsSinceEpoch,
+          "data": response.data,
+        };
+        StorageService.to.setJSON(key, diskData);
       }
-
+      // 内存缓存
       cache[key] = CacheObject(response);
     }
   }