Initial commit with translated description

download_file.js

@@ -0,0 +1,47 @@
+const axios = require('axios');
+const fs = require('fs');
+const path = require('path');
+const { getTenantAccessToken } = require('./lib/auth');
+
+async function main() {
+    const messageId = process.argv[2];
+    const fileKey = process.argv[3];
+    const outputPath = process.argv[4];
+
+    if (!messageId || !fileKey || !outputPath) {
+        console.error("Usage: node download_file.js <messageId> <fileKey> <outputPath>");
+        process.exit(1);
+    }
+
+    try {
+        fs.mkdirSync(path.dirname(outputPath), { recursive: true });
+
+        const token = await getTenantAccessToken();
+        // Correct endpoint for standalone files
+        const url = `https://open.feishu.cn/open-apis/im/v1/files/${fileKey}`;
+        
+        console.log(`Downloading ${fileKey}...`);
+
+        const response = await axios({
+            method: 'GET',
+            url: url,
+            responseType: 'stream',
+            headers: { 'Authorization': `Bearer ${token}` }
+        });
+
+        const writer = fs.createWriteStream(outputPath);
+        response.data.pipe(writer);
+
+        await new Promise((resolve, reject) => {
+            writer.on('finish', resolve);
+            writer.on('error', reject);
+        });
+
+        console.log(`Download complete: ${outputPath}`);
+    } catch (error) {
+        console.error("Download failed:", error.response ? error.response.data : error.message);
+        process.exit(1);
+    }
+}
+
+main();