cont

* conditionally send 100 Continue instead

api.py

@@ -348,11 +348,11 @@ if _server is not None:
         except Exception as e:
             return web.json_response(dict(error=str(e)), status=500)
 
-    @_server.routes.put("/api/etn/image/{id}")
     async def put_image(request: web.Request):
         try:
             id = request.match_info.get("id", "")
             if id in image_cache:
+                await request.release()  # Consume and discard the data to avoid connection abort
                 return web.json_response(dict(status="cached"), status=200)
 
             content_type = request.headers.get("Content-Type", "application/octet-stream")
@@ -365,6 +365,17 @@ if _server is not None:
         except Exception as e:
             return web.json_response(dict(error=str(e)), status=500)
 
+    async def _put_image_expect_handler(request: web.Request):
+        if request.match_info.get("id", "") in image_cache:
+            # Skip "100 Continue" since we don't need the data, return 200 immediately.
+            return web.json_response(dict(status="cached"), status=200)
+        # otherwise run default aiohttp handler
+        return None
+
+    _server.app.router.add_route(
+        "PUT", "/api/etn/image/{id}", put_image, expect_handler=_put_image_expect_handler
+    )
+
     @_server.routes.put("/api/etn/upload/{folder_name}/{filename}")
     async def upload(request: web.Request):
         folder_name = request.match_info.get("folder_name", "")