feat(网络请求): 增加超时和重试机制提升稳定性

为 asyncHttpsGet 添加超时参数，默认10秒
在 TuneHub 服务中实现3次重试机制，每次增加超时时间
优化错误日志记录，包含更多调试信息

backend/src/handler/sync_jobs.js

@@ -65,7 +65,7 @@ async function createJob(req, res) {
         }
 
         let meta = {};
-        const songId = request.urlJob && request.urlJob.meta.songId ? request.urlJob.meta.songId : "";
+        let songId = request.urlJob && request.urlJob.meta.songId ? request.urlJob.meta.songId : "";
         logger.info(`[createJob] songId=${songId}`);
 
         // 先从 TuneHub 获取歌曲信息，避免显示原始 URL

backend/src/service/music_platform/tunehub.js

@@ -8,16 +8,21 @@ function buildApiUrl(params = {}) {
     return `${BaseUrl}?${searchParams.toString()}`;
 }
 
-async function fetchJson(params = {}) {
+async function fetchJson(params = {}, attempt = 1) {
     const url = buildApiUrl(params);
-    const raw = await asyncHttpsGet(url);
+    // 重试时增加超时时间
+    const timeoutMs = Math.min(30000, 5000 + attempt * 5000);
+    logger.info(`[TuneHub] Fetching: ${url} (attempt ${attempt}, timeout ${timeoutMs}ms)`);
+    const raw = await asyncHttpsGet(url, timeoutMs);
     if (!raw) {
+        logger.warn(`[TuneHub] No data received for ${url}`);
         return null;
     }
     try {
         return JSON.parse(raw);
     } catch (err) {
-        logger.error(`TuneHub 返回非 JSON: ${url}`);
+        logger.error(`[TuneHub] Failed to parse JSON from ${url}: ${err.message}`);
+        logger.error(`[TuneHub] Raw response: ${raw.substring(0, 200)}...`);
         return null;
     }
 }
@@ -35,15 +40,33 @@ async function getPlaylistDetail(source, playlistId) {
 }
 
 async function getSongInfo(source, songId) {
-    const response = await fetchJson({
-        source,
-        id: songId,
-        type: 'info',
-    });
-    if (!response || response.code !== 200 || !response.data) {
-        return false;
+    // 增加重试机制，提高成功率
+    const maxRetries = 3;
+    for (let attempt = 1; attempt <= maxRetries; attempt++) {
+        try {
+            logger.info(`[TuneHub] Attempt ${attempt}/${maxRetries} to get song info: ${source}:${songId}`);
+            const response = await fetchJson({
+                source,
+                id: songId,
+                type: 'info',
+            }, attempt);
+            if (response && response.code === 200 && response.data) {
+                logger.info(`[TuneHub] Success: ${source}:${songId}`);
+                return response.data;
+            }
+            logger.warn(`[TuneHub] Failed attempt ${attempt}: code=${response?.code || 'no response'}, data=${!!response?.data}`);
+            if (attempt < maxRetries) {
+                await new Promise(resolve => setTimeout(resolve, 1000 * attempt));
+            }
+        } catch (error) {
+            logger.error(`[TuneHub] Error on attempt ${attempt}: ${error.message}`);
+            if (attempt < maxRetries) {
+                await new Promise(resolve => setTimeout(resolve, 1000 * attempt));
+            }
+        }
     }
-    return response.data;
+    logger.error(`[TuneHub] All ${maxRetries} attempts failed for ${source}:${songId}`);
+    return false;
 }
 
 async function searchSongs(keyword, {

backend/src/utils/network.js

@@ -1,7 +1,12 @@
 const https = require('https');
 
-function asyncHttpsGet(url) {
+function asyncHttpsGet(url, timeoutMs = 10000) {
     return new Promise((resolve) => {
+        const timeout = setTimeout(() => {
+            console.error(`[asyncHttpsGet] Timeout after ${timeoutMs}ms: ${url}`);
+            resolve(null);
+        }, timeoutMs);
+
         https.get(url, res => {
             let data = '';
 
@@ -10,10 +15,12 @@ function asyncHttpsGet(url) {
             });
 
             res.on('end', () => {
+                clearTimeout(timeout);
                 resolve(data.toString());
             });
 
         }).on('error', err => {
+            clearTimeout(timeout);
             console.error(err);
             resolve(null);
         });