Create server.js

server.js

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+// @ts-nocheck
+import express from 'express';
+import cors from 'cors';
+import multer from 'multer';
+import { uploadFile } from '@huggingface/hub';
+import path from 'path';
+import { fileURLToPath } from 'url';
+import dotenv from 'dotenv';
+dotenv.config()
+// Fix __dirname for ES Modules
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const app = express();
+// Hugging Face Spaces requires port 7860
+const port = process.env.PORT || 7860;
+
+// Middleware
+app.use(cors());
+app.use(express.json());
+
+// Configure Multer for memory storage (file buffer)
+const storage = multer.memoryStorage();
+const upload = multer({ storage: storage });
+
+// SERVER CONFIGURATION
+// PRIORITY: Environment Variable > Hardcoded Fallback
+const SERVER_CONFIG = {
+  TOKEN: process.env.HF_TOKEN || '',
+  REPO: process.env.HF_REPO || 'TwanAPI/DataTwan',
+  TYPE: 'dataset'
+};
+
+// --- API ROUTES ---
+
+// Upload Endpoint
+app.post('/api/upload', upload.single('file'), async (req, res) => {
+  try {
+    const file = req.file;
+    const filePath = req.body.path;
+
+    if (!file) {
+      return res.status(400).json({ error: 'No file provided' });
+    }
+
+    if (!filePath) {
+      return res.status(400).json({ error: 'No file path provided' });
+    }
+
+    console.log(`[SERVER] Uploading: ${filePath} (${file.size} bytes)`);
+
+    // Upload to Hugging Face
+    const response = await uploadFile({
+      credentials: {
+        accessToken: SERVER_CONFIG.TOKEN,
+      },
+      repo: {
+        type: SERVER_CONFIG.TYPE,
+        name: SERVER_CONFIG.REPO
+      },
+      file: {
+        path: filePath,
+        content: new Blob([file.buffer]),
+      },
+    });
+
+    const commitHash = response.commit.oid;
+    const urlPrefix = "https://huggingface.co/datasets";
+    const publicUrl = `${urlPrefix}/${SERVER_CONFIG.REPO}/blob/${commitHash}/${filePath}`;
+
+    console.log(`[SERVER] Success: ${publicUrl}`);
+
+    res.json({ 
+      success: true, 
+      url: publicUrl 
+    });
+
+  } catch (error) {
+    console.error('[SERVER] Upload Error:', error);
+    res.status(500).json({ 
+      success: false, 
+      error: error.message || 'Internal Server Error' 
+    });
+  }
+});
+
+// --- SERVE FRONTEND (Production) ---
+
+// Serve static files from the React build directory
+app.use(express.static(path.join(__dirname, 'dist')));
+
+// Handle React Routing (SPA) - Return index.html for any unknown route
+app.get('*', (req, res) => {
+  res.sendFile(path.join(__dirname, 'dist', 'index.html'));
+});
+
+// Start Server
+app.listen(port, () => {
+  console.log(`--------------------------------------------------`);
+  console.log(`✅ Server running on port ${port}`);
+  console.log(`   Target Repo: ${SERVER_CONFIG.REPO}`);
+  console.log(`--------------------------------------------------`);
+});