websockets: pass connection to WebRequest

This gives handlers direct access to a websocket client connection.

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>

moonraker/websockets.py

@@ -15,10 +15,11 @@ class Sentinel:
     pass
 
 class WebRequest:
-    def __init__(self, endpoint, args, action=""):
+    def __init__(self, endpoint, args, action="", conn=None):
         self.endpoint = endpoint
         self.action = action
         self.args = args
+        self.conn = conn
 
     def get_endpoint(self):
         return self.endpoint
@@ -29,6 +30,9 @@ class WebRequest:
     def get_args(self):
         return self.args
 
+    def get_connection(self):
+        return self.conn
+
     def _get_converted_arg(self, key, default=Sentinel, dtype=str):
         if key not in self.args:
             if default == Sentinel:
@@ -79,7 +83,7 @@ class JsonRPC:
     def remove_method(self, name):
         self.methods.pop(name, None)
 
-    async def dispatch(self, data):
+    async def dispatch(self, data, ws):
         response = None
         try:
             request = json.loads(data)
@@ -92,19 +96,19 @@ class JsonRPC:
         if isinstance(request, list):
             response = []
             for req in request:
-                resp = await self.process_request(req)
+                resp = await self.process_request(req, ws)
                 if resp is not None:
                     response.append(resp)
             if not response:
                 response = None
         else:
-            response = await self.process_request(request)
+            response = await self.process_request(request, ws)
         if response is not None:
             response = json.dumps(response)
             logging.debug("Websocket Response::" + response)
         return response
 
-    async def process_request(self, request):
+    async def process_request(self, request, ws):
         req_id = request.get('id', None)
         rpc_version = request.get('jsonrpc', "")
         method_name = request.get('method', None)
@@ -116,18 +120,20 @@ class JsonRPC:
         if 'params' in request:
             params = request['params']
             if isinstance(params, list):
-                response = await self.execute_method(method, req_id, *params)
+                response = await self.execute_method(
+                    method, req_id, ws, *params)
             elif isinstance(params, dict):
-                response = await self.execute_method(method, req_id, **params)
+                response = await self.execute_method(
+                    method, req_id, ws, **params)
             else:
                 return self.build_error(-32600, "Invalid Request", req_id)
         else:
-            response = await self.execute_method(method, req_id)
+            response = await self.execute_method(method, req_id, ws)
         return response
 
-    async def execute_method(self, method, req_id, *args, **kwargs):
+    async def execute_method(self, method, req_id, ws, *args, **kwargs):
         try:
-            result = await method(*args, **kwargs)
+            result = await method(ws, *args, **kwargs)
         except TypeError as e:
             return self.build_error(-32603, f"Invalid params:\n{e}", req_id)
         except ServerError as e:
@@ -209,16 +215,16 @@ class WebsocketManager:
         self.rpc.remove_method(ws_method)
 
     def _generate_callback(self, endpoint):
-        async def func(**kwargs):
+        async def func(ws, **kwargs):
             result = await self.server.make_request(
-                WebRequest(endpoint, kwargs))
+                WebRequest(endpoint, kwargs, conn=ws))
             return result
         return func
 
     def _generate_local_callback(self, endpoint, request_method, callback):
-        async def func(**kwargs):
+        async def func(ws, **kwargs):
             result = await callback(
-                WebRequest(endpoint, kwargs, request_method))
+                WebRequest(endpoint, kwargs, request_method, ws))
             return result
         return func
 
@@ -274,7 +280,7 @@ class WebSocket(WebSocketHandler):
 
     async def _process_message(self, message):
         try:
-            response = await self.rpc.dispatch(message)
+            response = await self.rpc.dispatch(message, self)
             if response is not None:
                 self.write_message(response)
         except Exception: