Actually implement a working NullSessionInterface, fixes pgjones/quart#105, bump version

quart_session/__init__.py

@@ -98,6 +98,10 @@ class Session(object):
             app.logger.warning("Deprecation: `SESSION_HIJACK_REVERSE_PROXY` "
                                "has been renamed to `SESSION_REVERSE_PROXY`")
 
+        backend_warning = f"Please specify a session backend. " \
+                          f"Available interfaces: redis, redis+trio, " \
+                          f"memcached, null. e.g: app.config['SESSION_TYPE'] = 'redis'"
+
         if config['SESSION_TYPE'] == 'redis':
             options = {
                 "redis": config['SESSION_REDIS'],
@@ -129,7 +133,15 @@ class Session(object):
                 use_signer=config['SESSION_USE_SIGNER'],
                 permanent=config['SESSION_PERMANENT'],
                 **config)
+        elif config['SESSION_TYPE'] == 'null':
+            app.logger.warning(f"{backend_warning}. Currently using: null")
+            session_interface = NullSessionInterface(
+                key_prefix=config['SESSION_KEY_PREFIX'],
+                use_signer=config['SESSION_USE_SIGNER'],
+                permanent=config['SESSION_PERMANENT'],
+                **config)
         else:
-            session_interface = NullSessionInterface()
+            raise NotImplementedError(f"No such session interface "
+                                      f"\"{config['SESSION_TYPE']}\". {backend_warning}")
 
         return session_interface

quart_session/sessions.py

@@ -354,8 +354,23 @@ class MemcachedSessionInterface(SessionInterface):
 
 
 class NullSessionInterface(SessionInterface):
-    """Used to open a :class:`quart.sessions.NullSession` instance.
-    """
+    """This class does absolutely nothing"""
+    session_class = NullSession
 
-    def open_session(self, app: Quart, request: BaseRequestWebsocket):
-        return None
+    def __init__(
+            self, key_prefix: str, use_signer: bool = False,
+            permanent: bool = True, **kwargs):
+        super(NullSessionInterface, self).__init__(
+            key_prefix=key_prefix, use_signer=use_signer,
+            permanent=permanent, **kwargs)
+        self.backend = None
+
+    async def create(self, app: Quart) -> None:
+        pass
+
+    async def get(self, key: str, app: Quart = None) -> None:
+        pass
+
+    async def set(self, key: str, value, expiry: int = None,
+                  app: Quart = None) -> None:
+        pass

setup.py

@@ -24,7 +24,7 @@ INSTALL_REQUIRES = [
 
 setup(
     name='Quart-Session',
-    version='1.0.0',
+    version='1.0.1',
     url='https://github.com/sferdi0/quart-session',
     license='BSD',
     author='Sander',