feat: sub-store.json 初始化时, 支持读取 Base64 内容

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.19.87",
+  "version": "2.19.89",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and Shadowrocket.",
   "main": "src/main.js",
   "scripts": {

backend/src/restful/miscs.js

@@ -41,10 +41,30 @@ export default function register($app) {
                 );
         })
         .post((req, res) => {
-            const { content } = req.body;
-            $.write(content, '#sub-store');
+            let { content } = req.body;
+            try {
+                content = JSON.parse(Base64.decode(content));
+                if (Object.keys(content.settings).length === 0) {
+                    throw new Error('备份文件应该至少包含 settings 字段');
+                }
+            } catch (err) {
+                try {
+                    content = JSON.parse(content);
+                    if (Object.keys(content.settings).length === 0) {
+                        throw new Error('备份文件应该至少包含 settings 字段');
+                    }
+                } catch (err) {
+                    $.error(
+                        `备份文件校验失败, 无法还原\nReason: ${
+                            err.message ?? err
+                        }`,
+                    );
+                    throw new Error('备份文件校验失败, 无法还原');
+                }
+            }
+            $.write(JSON.stringify(content, null, `  `), '#sub-store');
             if ($.env.isNode) {
-                $.cache = JSON.parse(content);
+                $.cache = content;
                 $.persistCache();
             }
             migrate();

backend/src/vendor/open-api.js

@@ -9,6 +9,7 @@ const isShadowRocket = 'undefined' !== typeof $rocket;
 const isEgern = 'object' == typeof egern;
 const isLanceX = 'undefined' != typeof $native;
 const isGUIforCores = typeof $Plugins !== 'undefined';
+import { Base64 } from 'js-base64';
 
 function isPlainObject(obj) {
     return (
@@ -120,13 +121,23 @@ export class OpenAPI {
             if (this.node.fs.existsSync(fpath)) {
                 try {
                     this.cache = JSON.parse(
-                        this.node.fs.readFileSync(`${fpath}`),
+                        this.node.fs.readFileSync(`${fpath}`, 'utf-8'),
                     );
                 } catch (e) {
-                    this.node.fs.copyFileSync(fpath, backupPath);
-                    this.error(
-                        `Failed to parse ${fpath}: ${e.message}. Backup created at ${backupPath}`,
-                    );
+                    try {
+                        const str = Base64.decode(
+                            this.node.fs.readFileSync(`${fpath}`, 'utf-8'),
+                        );
+                        this.cache = JSON.parse(str);
+                        this.node.fs.writeFileSync(fpath, str, {
+                            flag: 'w',
+                        });
+                    } catch (e) {
+                        this.node.fs.copyFileSync(fpath, backupPath);
+                        this.error(
+                            `Failed to parse ${fpath}: ${e.message}. Backup created at ${backupPath}`,
+                        );
+                    }
                 }
             }
             if (!isPlainObject(this.cache)) {