feat: dplayer

proxy.js

@@ -8,6 +8,8 @@ const port = 3000;
 // 允许跨域请求
 app.use((req, res, next) => {
   res.header('Access-Control-Allow-Origin', '*');
+  res.header('Access-Control-Allow-Methods', 'GET, HEAD, OPTIONS');
+  res.header('Access-Control-Allow-Headers', 'Range');
   next();
 });
 
@@ -18,22 +20,35 @@ app.get('/proxy', async (req, res) => {
   const targetUrl = req.query.url;
   console.log('Fetching data from:', targetUrl);
   if (!targetUrl) {
-    return res.status(400).send('URL parameter is required');
+    return res.status(400).json({ error: 'URL parameter is required' });
   }
 
   try {
     // 设置请求头
-    const headers = {};
+    const headers = {
+      'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
+    };
     if (req.headers.range) {
-      headers['Range'] = req.headers.range; // 转发 Range 请求头
+      headers['Range'] = req.headers.range; // 转发 Range 请求头，支持视频分段加载
     }
 
     // 向目标 URL 发起请求
     const response = await fetch(targetUrl, { headers });
 
+    // 检查响应状态
+    if (!response.ok) {
+      return res.status(response.status).json({ 
+        error: `Failed to fetch: ${response.statusText}`,
+        status: response.status 
+      });
+    }
+
     // 设置响应头
     response.headers.forEach((value, key) => {
-      if (key !== 'content-encoding') { // 避免某些头信息导致问题
+      // 跳过一些可能导致问题的头信息
+      if (key.toLowerCase() !== 'content-encoding' && 
+          key.toLowerCase() !== 'transfer-encoding' &&
+          key.toLowerCase() !== 'connection') {
         res.setHeader(key, value);
       }
     });
@@ -44,19 +59,55 @@ app.get('/proxy', async (req, res) => {
     }
 
     // 将响应体直接流式传输给客户端
-    response.body.pipe(res, { end: true });
+    if (response.body) {
+      response.body.pipe(res, { end: true });
 
-    // 错误处理
-    response.body.on('error', (err) => {
-      console.error('Error during data transfer:', err);
-      res.status(500).send('Error during data transfer');
-    });
+      // 错误处理
+      response.body.on('error', (err) => {
+        console.error('Error during data transfer:', err);
+        if (!res.headersSent) {
+          res.status(500).json({ error: 'Error during data transfer' });
+        }
+      });
+    } else {
+      res.status(500).json({ error: 'No response body' });
+    }
   } catch (error) {
     console.error('Error fetching data:', error);
-    res.status(500).send('Error fetching data');
+    
+    // 根据错误类型返回更具体的错误信息
+    let errorMessage = 'Error fetching data';
+    let statusCode = 500;
+    let hostname = '';
+    
+    try {
+      hostname = new URL(targetUrl).hostname;
+    } catch (e) {
+      hostname = 'unknown';
+    }
+    
+    if (error.code === 'ENOTFOUND') {
+      errorMessage = `DNS解析失败：无法解析域名 "${hostname}"。请检查URL是否正确，或网络连接是否正常。`;
+      statusCode = 502;
+    } else if (error.code === 'ECONNREFUSED') {
+      errorMessage = `连接被拒绝：无法连接到目标服务器 "${hostname}"。`;
+      statusCode = 502;
+    } else if (error.code === 'ETIMEDOUT') {
+      errorMessage = `请求超时：目标服务器 "${hostname}" 响应时间过长。`;
+      statusCode = 504;
+    }
+    
+    if (!res.headersSent) {
+      res.status(statusCode).json({ 
+        error: errorMessage,
+        code: error.code,
+        targetUrl: targetUrl 
+      });
+    }
   }
 });
 
 app.listen(port, () => {
   console.log(`Proxy server running at http://localhost:${port}`);
-});
+});
+