sanic/cookies/request.py

@@ -149,11 +149,13 @@ class CookieRequestParameters(RequestParameters):
         except KeyError:
             return super().get(name, default)
 
-    def getlist(self, name: str) -> list[Any]:
+    def getlist(
+        self, name: str, default: Optional[Any] = None
+    ) -> Optional[Any]:
         try:
             return self._get_prefixed_cookie(name)
         except KeyError:
-            return super().getlist(name)
+            return super().getlist(name, default)
 
     def _get_prefixed_cookie(self, name: str) -> Any:
         getitem = super().__getitem__

sanic/request/parameters.py

@@ -19,14 +19,15 @@ class RequestParameters(dict):
         return super().get(name, [default])[0]
 
     def getlist(
-        self, name: str
+        self, name: str, default: Optional[Any] = None
-    ) -> list[Any]:
+    ) -> Optional[Any]:
         """Return the entire list
 
         Args:
             name (str): The name of the parameter
+            default (Optional[Any], optional): The default value. Defaults to None.
 
         Returns:
-            list[Any]: The entire list of values or [] if not found
+            Optional[Any]: The entire list
         """  # noqa: E501
-        return super().get(name) or []
+        return super().get(name, default)

tests/test_cookies.py

@@ -445,10 +445,10 @@ def test_cookie_accessors(app: Sanic):
                     "four": request.cookies.get("four", "fallback"),
                 },
                 "getlist": {
-                    "one": request.cookies.getlist("one"),
+                    "one": request.cookies.getlist("one", ["fallback"]),
-                    "two": request.cookies.getlist("two"),
+                    "two": request.cookies.getlist("two", ["fallback"]),
-                    "three": request.cookies.getlist("three"),
+                    "three": request.cookies.getlist("three", ["fallback"]),
-                    "four": request.cookies.getlist("four"),
+                    "four": request.cookies.getlist("four", ["fallback"]),
                 },
                 "getattr": {
                     "one": request.cookies.one,
@@ -484,7 +484,7 @@ def test_cookie_accessors(app: Sanic):
             "one": ["1"],
             "two": ["2"],
             "three": ["3"],
-            "four": [],
+            "four": ["fallback"],
         },
         "getattr": {
             "one": "1",