Handle events with catch-all namespace (Fixes #2061)

src/flask_socketio/__init__.py

@@ -279,7 +279,13 @@ def handle_my_custom_event(json):
         def decorator(handler):
             @wraps(handler)
             def _handler(sid, *args):
-                return self._handle_event(handler, message, namespace, sid,
+                nonlocal namespace
+                real_ns = namespace
+                if namespace == '*':
+                    real_ns = sid
+                    sid = args[0]
+                    args = args[1:]
+                return self._handle_event(handler, message, real_ns, sid,
                                           *args)
 
             if self.server:

test_socketio.py

@@ -182,6 +182,11 @@ def on_changing_response():
     return data
 
 
+@socketio.on('wildcard', namespace='*')
+def wildcard(data):
+    emit('my custom response', data)
+
+
 @socketio.on_error()
 def error_handler(value):
     if isinstance(value, AssertionError):
@@ -416,6 +421,16 @@ def test_send_json_namespace(self):
         self.assertEqual(len(received), 1)
         self.assertEqual(received[0]['args']['a'], 'b')
 
+    def test_send_catch_all_namespace(self):
+        client = socketio.test_client(app, namespace='/test')
+        client.get_received('/test')
+        client.emit('wildcard', {'a': 'b'}, namespace='/test')
+        received = client.get_received('/test')
+        self.assertEqual(len(received), 1)
+        self.assertEqual(len(received[0]['args']), 1)
+        self.assertEqual(received[0]['name'], 'my custom response')
+        self.assertEqual(received[0]['args'][0]['a'], 'b')
+
     def test_emit(self):
         client = socketio.test_client(app, auth={'foo': 'bar'})
         client.get_received()