Update srv.py

srv.py

@@ -1,7 +1,5 @@
 from flask import Flask, request, jsonify, send_file, render_template
 from yt_dlp import YoutubeDL
-import random
-import string
 import os
 
 app = Flask(__name__)
@@ -81,9 +79,9 @@ def download():
             info = ydl.extract_info(url, download=True)
             
             if format_type == 'mp3':
-                file_name = ''.join(random.choices(string.ascii_letters + string.digits, k=19))
+                file_name = ydl.prepare_filename(info).rsplit(".", 1)[0] + ".mp3"
             else:
-                file_name = ''.join(random.choices(string.ascii_letters + string.digits, k=20))
+                file_name = ydl.prepare_filename(info)
 
         return send_file(
             file_name,