Formatting and fix Internal Server Error on upload

cista/api.py

@@ -12,15 +12,18 @@ from cista.util.apphelpers import asend, websocket_wrapper
 bp = Blueprint("api", url_prefix="/api")
 fileserver = FileServer()
 
+
 @bp.before_server_start
 async def start_fileserver(app, _):
     await fileserver.start()
 
+
 @bp.after_server_stop
 async def stop_fileserver(app, _):
     await fileserver.stop()
 
-@bp.websocket('upload')
+
+@bp.websocket("upload")
 @websocket_wrapper
 async def upload(req, ws):
     alink = fileserver.alink
@@ -28,7 +31,9 @@ async def upload(req, ws):
         req = None
         text = await ws.recv()
         if not isinstance(text, str):
-            raise ValueError(f"Expected JSON control, got binary len(data) = {len(text)}")
+            raise ValueError(
+                f"Expected JSON control, got binary len(data) = {len(text)}"
+            )
         req = msgspec.json.decode(text, type=FileRange)
         pos = req.start
         data = None
@@ -41,9 +46,10 @@ async def upload(req, ws):
         # Report success
         res = StatusMsg(status="ack", req=req)
         await asend(ws, res)
-        #await ws.drain()
+        # await ws.drain()
 
-@bp.websocket('download')
+
+@bp.websocket("download")
 @websocket_wrapper
 async def download(req, ws):
     alink = fileserver.alink
@@ -51,18 +57,21 @@ async def download(req, ws):
         req = None
         text = await ws.recv()
         if not isinstance(text, str):
-            raise ValueError(f"Expected JSON control, got binary len(data) = {len(text)}")
+            raise ValueError(
+                f"Expected JSON control, got binary len(data) = {len(text)}"
+            )
         req = msgspec.json.decode(text, type=FileRange)
         pos = req.start
         while pos < req.end:
-            end = min(req.end, pos + (1<<20))
+            end = min(req.end, pos + (1 << 20))
             data = typing.cast(bytes, await alink(("download", req.name, pos, end)))
             await asend(ws, data)
             pos += len(data)
         # Report success
         res = StatusMsg(status="ack", req=req)
         await asend(ws, res)
-        #await ws.drain()
+        # await ws.drain()
+
 
 @bp.websocket("control")
 @websocket_wrapper
@@ -71,6 +80,7 @@ async def control(req, ws):
     await asyncio.to_thread(cmd)
     await asend(ws, StatusMsg(status="ack", req=cmd))
 
+
 @bp.websocket("watch")
 @websocket_wrapper
 async def watch(req, ws):