Allow both postgresql/postgres as dsn schemes

README.md

@@ -118,6 +118,17 @@ handler = Mangum(
 
     Defaults to the `AWS_REGION` value in the AWS Lambda environment.
 
+
+### Event and context
+
+The AWS Lambda handler has `event` and `context` parameters. These are available in the ASGI `scope` object:
+
+```python
+scope['aws.event']
+scope['aws.context']
+```
+
+
 ## Examples
 
 The examples below are ASGI applications (non-framework) with minimal configurations. You should be able to replace the `app` in these example with most ASGI framework application instances. Please read the [HTTP](https://erm.github.io/mangum/http/) and [WebSocket](https://erm.github.io/mangum/websocket/) docs for more detailed configuration information.

docs/index.md

@@ -10,6 +10,8 @@
 
 Mangum is an adapter for using [ASGI](https://asgi.readthedocs.io/en/latest/) applications with AWS Lambda & API Gateway. It is intended to provide an easy-to-use, configurable wrapper for any ASGI application deployed in an AWS Lambda function to handle API Gateway requests and responses.
 
+***Documentation***: https://mangum.io/
+
 ## Features
 
 - API Gateway support for [HTTP](https://docs.aws.amazon.com/apigateway/latest/developerguide/http-api.html), [REST](https://docs.aws.amazon.com/apigateway/latest/developerguide/apigateway-rest-api.html), and [WebSocket](https://docs.aws.amazon.com/apigateway/latest/developerguide/apigateway-websocket-api.html) APIs.
@@ -116,6 +118,17 @@ handler = Mangum(
 
     Defaults to the `AWS_REGION` value in the AWS Lambda environment.
 
+
+### Event and context
+
+The AWS Lambda handler has `event` and `context` parameters. These are available in the ASGI `scope` object:
+
+```python
+scope['aws.event']
+scope['aws.context']
+```
+
+
 ## Examples
 
 The examples below are ASGI applications (non-framework) with minimal configurations. You should be able to replace the `app` in these example with most ASGI framework application instances. Please read the [HTTP](https://erm.github.io/mangum/http/) and [WebSocket](https://erm.github.io/mangum/websocket/) docs for more detailed configuration information.

mangum/exceptions.py

@@ -8,6 +8,3 @@ class WebSocketError(Exception):
 
 class ConfigurationError(Exception):
     """Raise when an error occurs parsing configuration."""
-
-    # def __init__(self, param: str) -> None:
-    #     super().__init__(f"Missing {param} in configuration")

mangum/protocols/ws.py

@@ -14,6 +14,7 @@ class WebSocketCycleState(enum.Enum):
 
 @dataclass
 class WebSocketCycle:
+
     websocket: WebSocket
     log_level: str
     state: WebSocketCycleState = WebSocketCycleState.REQUEST

mangum/websocket.py

@@ -45,7 +45,7 @@ def __post_init__(self) -> None:
 
             self._backend = S3Backend(self.dsn)  # type: ignore
 
-        elif scheme == "postgresql":
+        elif scheme in ("postgresql", "postgres"):
             from mangum.backends.postgresql import PostgreSQLBackend
 
             self._backend = PostgreSQLBackend(self.dsn)  # type: ignore