fix: 修复 Base64 解析逻辑

Author: xream

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.36.2",
+  "version": "2.36.3",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and Shadowrocket.",
   "main": "src/main.js",
   "packageManager": "pnpm@11.0.9",

backend/src/core/proxy-utils/preprocessors/index.js

@@ -67,6 +67,7 @@ function Base64Encoded() {
 
     const test = function (raw) {
         return (
+            Base64.isValid(raw) &&
             !/^\w+:\/\/\w+/im.test(raw) &&
             keys.some((k) => raw.indexOf(k) !== -1)
         );
@@ -89,7 +90,7 @@ function fallbackBase64Encoded() {
     const name = 'Fallback Base64 Pre-processor';
 
     const test = function (raw) {
-        return true;
+        return Base64.isValid(raw);
     };
     const parse = function (raw) {
         const decoded = Base64.decode(raw);

backend/src/test/proxy-preprocessors/preprocessors.spec.js

@@ -84,6 +84,13 @@ describe('Proxy preprocessors', function () {
 
             expect(processor.test(raw)).to.equal(false);
         });
+
+        it('ignores invalid base64 containing an encoded proxy prefix', function () {
+            const processor = getPreprocessor('Base64 Pre-processor');
+            const raw = `🔥${Base64.encode('vmess://test')}`;
+
+            expect(processor.test(raw)).to.equal(false);
+        });
     });
 
     describe('Fallback Base64 preprocessor', function () {
@@ -97,6 +104,13 @@ describe('Proxy preprocessors', function () {
             expect(processor.parse(encoded)).to.equal(decoded);
             expect(processor.parse(invalid)).to.equal(invalid);
         });
+
+        it('ignores invalid base64 that decodes to a proxy prefix', function () {
+            const processor = getPreprocessor('Fallback Base64 Pre-processor');
+            const raw = `🔥${Base64.encode('vmess://test')}`;
+
+            expect(processor.test(raw)).to.equal(false);
+        });
     });
 
     describe('Clash preprocessor', function () {