allow sync and async function calls

server/Files.py

@@ -1,6 +1,7 @@
 import aiofiles.os
 import aiofiles
 import os
+import inspect
 
 async def read_file(path: str, callback=None):
   if not await aiofiles.os.path.exists(path):
@@ -8,7 +9,10 @@ async def read_file(path: str, callback=None):
 
   async with aiofiles.open(path, "r") as f:
     if callback:
-      return await callback(f)
+      result = callback(f)
+      if inspect.isawaitable(result):
+        return await result
+      return result
     return await f.read()
 
 
@@ -19,6 +23,8 @@ async def save_file(path: str, data, callback=None, *args, **kwargs):
 
   async with aiofiles.open(path, "w") as f:
     if callback:
-      await callback(data, f, *args, **kwargs)
+      result = callback(data, f, *args, **kwargs)
+      if inspect.isawaitable(result):
+        await result
     else:
       await f.write(data)