fix: bound captured mihomo output

README.md

@@ -1,3 +1,7 @@
+
+<a href="https://aikefu.tech">
+  <img src="https://raw.githubusercontent.com/GtxFury/FlyClash-Android/refs/heads/main/screenshots/file_000000009a5c720bbf9028b8da087f14.png" alt="友情推荐" />
+</a>
 <a href="https://www.stromsend.xyz/#/register?code=tIhaARYV">
   <img src="screenshots/unnamed.jpg" alt="友情推荐" />
 </a>

electron/main-process/bounded-output-buffer.js

@@ -0,0 +1,22 @@
+const DEFAULT_MAX_OUTPUT_CHARS = 256 * 1024;
+
+function appendBoundedOutput(currentOutput, nextChunk, maxChars = DEFAULT_MAX_OUTPUT_CHARS) {
+  if (!Number.isFinite(maxChars) || maxChars <= 0) {
+    return '';
+  }
+
+  const current = typeof currentOutput === 'string' ? currentOutput : '';
+  const next = Buffer.isBuffer(nextChunk) ? nextChunk.toString() : String(nextChunk ?? '');
+  const combined = current + next;
+
+  if (combined.length <= maxChars) {
+    return combined;
+  }
+
+  return combined.slice(-maxChars);
+}
+
+module.exports = {
+  DEFAULT_MAX_OUTPUT_CHARS,
+  appendBoundedOutput,
+};

electron/main-process/mihomo-service.js

@@ -17,6 +17,7 @@ module.exports = function initMihomoService(context) {
   const { applyOverrides } = require('../ipc-handlers/overrides');
   const { getMihomoControllerParam, cleanupSocketFile } = require('../utils/socket-path');
   const { RunningMode, setRunningMode, getRunningMode, isServiceMode, getSocketPath, getServiceSocketPath, getSidecarSocketPath } = require('../utils/running-mode');
+  const { appendBoundedOutput } = require('./bounded-output-buffer');
   console.log('[mihomo-service] applyOverrides函数已导入:', typeof applyOverrides);
 
   async function waitForProcessExit(proc, timeoutMs = 5000) {
@@ -1200,7 +1201,7 @@ module.exports = function initMihomoService(context) {
 
       spawnedProcess.stdout.on('data', (data) => {
         const logContent = data.toString();
-        stdoutOutput += logContent;  // 收集 stdout 输出
+        stdoutOutput = appendBoundedOutput(stdoutOutput, logContent);  // 收集最近的 stdout 输出
         console.log(`mihomo stdout: ${logContent}`);
 
         // 检测 TUN 启动失败
@@ -1258,7 +1259,7 @@ module.exports = function initMihomoService(context) {
 
       spawnedProcess.stderr.on('data', (data) => {
         const errorText = data.toString();
-        stderrOutput += errorText;  // 收集 stderr 输出
+        stderrOutput = appendBoundedOutput(stderrOutput, errorText);  // 收集最近的 stderr 输出
         console.error(`mihomo stderr: ${errorText}`);
         safeSend('mihomo-error', errorText);
         process.stderr.write(data);

package.json

@@ -13,6 +13,7 @@
     "build": "next build",
     "start": "next start",
     "lint": "next lint",
+    "test": "node --test",
     "rebuild:native": "electron-rebuild -f -w better-sqlite3",
     "postinstall": "electron-builder install-app-deps",
     "prepare": "node scripts/prepare.mjs",

test/bounded-output-buffer.test.js

@@ -0,0 +1,30 @@
+const assert = require('node:assert/strict');
+const test = require('node:test');
+
+const {
+  DEFAULT_MAX_OUTPUT_CHARS,
+  appendBoundedOutput,
+} = require('../electron/main-process/bounded-output-buffer');
+
+test('appendBoundedOutput keeps short output unchanged', () => {
+  const output = appendBoundedOutput('hello', '\nworld', 32);
+
+  assert.equal(output, 'hello\nworld');
+});
+
+test('appendBoundedOutput caps retained output and keeps newest content', () => {
+  let output = '';
+
+  output = appendBoundedOutput(output, '12345', 10);
+  output = appendBoundedOutput(output, '67890', 10);
+  output = appendBoundedOutput(output, 'abcde', 10);
+
+  assert.equal(output, '67890abcde');
+  assert.equal(output.length, 10);
+});
+
+test('appendBoundedOutput truncates a single large chunk to the configured limit', () => {
+  const output = appendBoundedOutput('', 'x'.repeat(DEFAULT_MAX_OUTPUT_CHARS + 5), 16);
+
+  assert.equal(output, 'x'.repeat(16));
+});