支持动图下载和预览

backend/routes/proxy.js

@@ -3,6 +3,7 @@ const router = express.Router();
 const ImageCacheService = require('../services/image-cache');
 const ApiCacheService = require('../services/api-cache');
 const { defaultLogger } = require('../utils/logger');
+const axios = require('axios');
 
 // 创建logger实例
 const logger = defaultLogger.child('ProxyRouter');  
@@ -53,6 +54,46 @@ router.get('/image', async (req, res) => {
   }
 });
 
+/**
+ * 通用文件代理（支持ZIP等二进制资源）
+ * GET /api/proxy/file?url=<encoded>
+ */
+router.get('/file', async (req, res) => {
+  try {
+    const { url } = req.query;
+    if (!url) {
+      return res.status(400).json({ success: false, error: 'File URL is required' });
+    }
+
+    const decodedUrl = decodeURIComponent(url);
+
+    // 发起请求到源站（例如 i.pximg.net），设置必要头以通过防盗链
+    const response = await axios.get(decodedUrl, {
+      responseType: 'arraybuffer',
+      headers: {
+        Referer: 'https://www.pixiv.net/',
+        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36',
+        Accept: '*/*'
+      },
+      timeout: 60000
+    });
+
+    const contentType = getContentType(decodedUrl);
+    res.set({
+      'Content-Type': contentType,
+      'Cache-Control': 'public, max-age=600',
+      'Access-Control-Allow-Origin': '*',
+      'Access-Control-Allow-Methods': 'GET',
+      'Access-Control-Allow-Headers': 'Content-Type'
+    });
+
+    res.send(response.data);
+  } catch (error) {
+    logger.error('File proxy error:', { message: error.message, status: error.response?.status });
+    res.status(500).json({ success: false, error: 'Failed to proxy file' });
+  }
+});
+
 /**
  * 缓存管理 - 获取缓存统计信息
  * GET /api/proxy/cache/stats
@@ -301,10 +342,13 @@ function getContentType(url) {
     'gif': 'image/gif',
     'webp': 'image/webp',
     'bmp': 'image/bmp',
-    'svg': 'image/svg+xml'
+    'svg': 'image/svg+xml',
+    'zip': 'application/zip',
+    'mp4': 'video/mp4',
+    'webm': 'video/webm'
   };
   
   return contentTypeMap[ext] || 'image/jpeg';
 }
 
-module.exports = router; 
+module.exports = router;