Change README to support new config option SESSION_URI

respect custom redis uri

README.md

@@ -16,7 +16,7 @@ $ pipenv install quart-session
 $ pip install quart-session
 ```
 
-and requires Python 3.7.0 or higher. A fairly minimal Quart-Session example is,
+and requires Python 3.7.0 or higher. A minimal Quart-Session example is:
 
 ```python3
 from quart import Quart, session
@@ -29,7 +29,11 @@ Session(app)
 @app.route('/')
 async def hello():
     session["foo"] = "bar"
-    return 'hello'
+    return "session key 'foo' set"
+
+@app.route('/foo')
+async def foo():
+    return session.get("foo", "session key 'foo' not found")
 
 app.run()
 ```
@@ -37,9 +41,9 @@ app.run()
 ## Features
 
 
-### Redis support
+### Redis
 
-via `aioredis`.
+via `aioredis>=2.0.0`.
 
 ```python3
 app = Quart(__name__)
@@ -47,8 +51,16 @@ app.config['SESSION_TYPE'] = 'redis'
 Session(app)
 ```
 
-If you already have a `aioredis.Client` instance and you'd like to share
+By default, Quart-session connects to Redis at `127.0.0.1:6379`. If you 
-it with the session interface,
+have a different location, use `SESSION_URI`
+
+```python3
+app = Quart(__name__)
+app.config['SESSION_TYPE'] = 'redis'
+app.config['SESSION_URI'] = 'redis://:password@localhost:6379'
+```
+
+Alternatively, for extra control, you may provide your own `aioredis.Client` instance altogether.
 
 ```python3
 app = Quart(__name__)
@@ -56,15 +68,17 @@ app.config['SESSION_TYPE'] = 'redis'
 
 @app.before_serving
 async def setup():
-    cache = await aioredis.create_redis_pool(...)
+    cache = await aioredis.Redis(
+        host="foobar.com",
+        port=6379,
+        password="foobar"
+    )
+    
     app.config['SESSION_REDIS'] = cache
     Session(app)
 ```
 
-By default, Quart-session creates a single connection to Redis, while
+#### Trio
-the example above sets up a connection pool.
-
-#### Trio support
 
 Quart-Session comes with [an (experimental) Redis client](quart_session/redis_trio) for use with the [Trio](https://trio.readthedocs.io/en/stable/) eventloop.
 
@@ -77,7 +91,7 @@ app.config['SESSION_TYPE'] = 'redis'
 Session(app)
 ```
 
-### Memcached support
+### Memcached
 
 via `aiomcache`.
 

quart_session/sessions.py

@@ -224,12 +224,14 @@ class RedisSessionInterface(SessionInterface):
         .. note::
 
             Creates a single Redis connection, you might prefer
-            pooling instead (see ``aioredis.Redis.create_redis_pool``)
+            pooling instead (see the `aioredis` documentation
+            for connection pool examples).
         """
         if self.backend is None:
             import aioredis
+            uri = app.config.get('SESSION_URI', 'redis://localhost')
             self.backend = await aioredis.from_url(
-                "redis://localhost", encoding="utf-8", decode_responses=True
+                uri, encoding="utf-8", decode_responses=True
             )
 
     async def get(self, key: str, app: Quart = None):