Исправление кодировки не-английских букв.

handlers.py

@@ -3,7 +3,7 @@ import os
 import sqlite3
 from datetime import datetime
 from http.server import BaseHTTPRequestHandler
-from urllib.parse import parse_qs, urlparse
+from urllib.parse import parse_qs, unquote, urlparse
 
 import database
 from config import get_storage_root, load_config
@@ -289,14 +289,19 @@ class FileServerHandler(BaseHTTPRequestHandler):
         self.send_redirect("/files")
 
     def handle_file_download(self, username, filename):
+        # Decode URL-encoded filename
+        # For example when we have not default symbols: %D1%80%D0%B8%D0%BD%D0%B3%D1%82%D0%BE%D0%BD.mp3
+        decoded_filename = unquote(filename)
+
         user_dir = os.path.join(get_storage_root(), username)
-        filepath = os.path.join(user_dir, filename)
+        filepath = os.path.join(user_dir, decoded_filename)
+        print(filepath)
 
         if not os.path.exists(filepath) or not os.path.isfile(filepath):
             self.send_html("<h1>File not found</h1>", 404)
             return
 
-        mime_type, _ = mimetypes.guess_type(filename)
+        mime_type, _ = mimetypes.guess_type(decoded_filename)
         if not mime_type:
             mime_type = "application/octet-stream"
 
@@ -306,9 +311,9 @@ class FileServerHandler(BaseHTTPRequestHandler):
             if mime_type.startswith(("image/", "video/", "audio/")):
                 disposition = "inline"
             else:
-                disposition = f'attachment; filename="{filename}"'
+                disposition = f"attachment; filename*=UTF-8''{quote(decoded_filename)}"
         else:
-            disposition = f'attachment; filename="{filename}"'
+            disposition = f"attachment; filename*=UTF-8''{quote(decoded_filename)}"
 
         self.send_response(200)
         self.send_header("Content-Type", mime_type)