We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Update asgi look examples to use aioredis 2
A new major vesion of aioredis was released, and it has some api changes.
This is the changelog https://github.com/aio-libs/aioredis-py/blob/master/CHANGELOG.md

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `examples/asgilook/asgilook/config.py`
Content:
```
1 import os
2 import pathlib
3 import uuid
4 
5 import aioredis
6 
7 
8 class Config:
9     DEFAULT_CONFIG_PATH = '/tmp/asgilook'
10     DEFAULT_MIN_THUMB_SIZE = 64
11     DEFAULT_REDIS_HOST = 'redis://localhost'
12     DEFAULT_REDIS_POOL = aioredis.create_redis_pool
13     DEFAULT_UUID_GENERATOR = uuid.uuid4
14 
15     def __init__(self):
16         self.storage_path = pathlib.Path(
17             os.environ.get('ASGI_LOOK_STORAGE_PATH', self.DEFAULT_CONFIG_PATH)
18         )
19         self.storage_path.mkdir(parents=True, exist_ok=True)
20 
21         self.create_redis_pool = Config.DEFAULT_REDIS_POOL
22         self.min_thumb_size = self.DEFAULT_MIN_THUMB_SIZE
23         self.redis_host = self.DEFAULT_REDIS_HOST
24         self.uuid_generator = Config.DEFAULT_UUID_GENERATOR
25
```

Path: `examples/asgilook/asgilook/cache.py`
Content:
```
1 import msgpack
2 
3 
4 class RedisCache:
5     PREFIX = 'asgilook:'
6     INVALIDATE_ON = frozenset({'DELETE', 'POST', 'PUT'})
7     CACHE_HEADER = 'X-ASGILook-Cache'
8     TTL = 3600
9 
10     def __init__(self, config):
11         self._config = config
12 
13         # NOTE(vytas): To be initialized upon application startup (see the
14         #   method below).
15         self._redis = None
16 
17     async def _serialize_response(self, resp):
18         data = await resp.render_body()
19         return msgpack.packb([resp.content_type, data], use_bin_type=True)
20 
21     def _deserialize_response(self, resp, data):
22         resp.content_type, resp.data = msgpack.unpackb(data, raw=False)
23         resp.complete = True
24         resp.context.cached = True
25 
26     async def process_startup(self, scope, event):
27         if self._redis is None:
28             self._redis = await self._config.create_redis_pool(self._config.redis_host)
29 
30     async def process_request(self, req, resp):
31         resp.context.cached = False
32 
33         if req.method in self.INVALIDATE_ON:
34             return
35 
36         key = f'{self.PREFIX}/{req.path}'
37         data = await self._redis.get(key)
38         if data is not None:
39             self._deserialize_response(resp, data)
40             resp.set_header(self.CACHE_HEADER, 'Hit')
41         else:
42             resp.set_header(self.CACHE_HEADER, 'Miss')
43 
44     async def process_response(self, req, resp, resource, req_succeeded):
45         if not req_succeeded:
46             return
47 
48         key = f'{self.PREFIX}/{req.path}'
49 
50         if req.method in self.INVALIDATE_ON:
51             await self._redis.delete(key)
52         elif not resp.context.cached:
53             data = await self._serialize_response(resp)
54             await self._redis.set(key, data, expire=self.TTL)
55
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/examples/asgilook/asgilook/cache.py b/examples/asgilook/asgilook/cache.py
--- a/examples/asgilook/asgilook/cache.py
+++ b/examples/asgilook/asgilook/cache.py
@@ -9,10 +9,7 @@
 
     def __init__(self, config):
         self._config = config
-
-        # NOTE(vytas): To be initialized upon application startup (see the
-        #   method below).
-        self._redis = None
+        self._redis = self._config.redis_from_url(self._config.redis_host)
 
     async def _serialize_response(self, resp):
         data = await resp.render_body()
@@ -24,8 +21,10 @@
         resp.context.cached = True
 
     async def process_startup(self, scope, event):
-        if self._redis is None:
-            self._redis = await self._config.create_redis_pool(self._config.redis_host)
+        await self._redis.ping()
+
+    async def process_shutdown(self, scope, event):
+        await self._redis.close()
 
     async def process_request(self, req, resp):
         resp.context.cached = False
@@ -51,4 +50,4 @@
             await self._redis.delete(key)
         elif not resp.context.cached:
             data = await self._serialize_response(resp)
-            await self._redis.set(key, data, expire=self.TTL)
+            await self._redis.set(key, data, ex=self.TTL)
diff --git a/examples/asgilook/asgilook/config.py b/examples/asgilook/asgilook/config.py
--- a/examples/asgilook/asgilook/config.py
+++ b/examples/asgilook/asgilook/config.py
@@ -9,7 +9,7 @@
     DEFAULT_CONFIG_PATH = '/tmp/asgilook'
     DEFAULT_MIN_THUMB_SIZE = 64
     DEFAULT_REDIS_HOST = 'redis://localhost'
-    DEFAULT_REDIS_POOL = aioredis.create_redis_pool
+    DEFAULT_REDIS_FROM_URL = aioredis.from_url
     DEFAULT_UUID_GENERATOR = uuid.uuid4
 
     def __init__(self):
@@ -18,7 +18,7 @@
         )
         self.storage_path.mkdir(parents=True, exist_ok=True)
 
-        self.create_redis_pool = Config.DEFAULT_REDIS_POOL
+        self.redis_from_url = Config.DEFAULT_REDIS_FROM_URL
         self.min_thumb_size = self.DEFAULT_MIN_THUMB_SIZE
         self.redis_host = self.DEFAULT_REDIS_HOST
         self.uuid_generator = Config.DEFAULT_UUID_GENERATOR

{"golden_diff": "diff --git a/examples/asgilook/asgilook/cache.py b/examples/asgilook/asgilook/cache.py\n--- a/examples/asgilook/asgilook/cache.py\n+++ b/examples/asgilook/asgilook/cache.py\n@@ -9,10 +9,7 @@\n \n     def __init__(self, config):\n         self._config = config\n-\n-        # NOTE(vytas): To be initialized upon application startup (see the\n-        #   method below).\n-        self._redis = None\n+        self._redis = self._config.redis_from_url(self._config.redis_host)\n \n     async def _serialize_response(self, resp):\n         data = await resp.render_body()\n@@ -24,8 +21,10 @@\n         resp.context.cached = True\n \n     async def process_startup(self, scope, event):\n-        if self._redis is None:\n-            self._redis = await self._config.create_redis_pool(self._config.redis_host)\n+        await self._redis.ping()\n+\n+    async def process_shutdown(self, scope, event):\n+        await self._redis.close()\n \n     async def process_request(self, req, resp):\n         resp.context.cached = False\n@@ -51,4 +50,4 @@\n             await self._redis.delete(key)\n         elif not resp.context.cached:\n             data = await self._serialize_response(resp)\n-            await self._redis.set(key, data, expire=self.TTL)\n+            await self._redis.set(key, data, ex=self.TTL)\ndiff --git a/examples/asgilook/asgilook/config.py b/examples/asgilook/asgilook/config.py\n--- a/examples/asgilook/asgilook/config.py\n+++ b/examples/asgilook/asgilook/config.py\n@@ -9,7 +9,7 @@\n     DEFAULT_CONFIG_PATH = '/tmp/asgilook'\n     DEFAULT_MIN_THUMB_SIZE = 64\n     DEFAULT_REDIS_HOST = 'redis://localhost'\n-    DEFAULT_REDIS_POOL = aioredis.create_redis_pool\n+    DEFAULT_REDIS_FROM_URL = aioredis.from_url\n     DEFAULT_UUID_GENERATOR = uuid.uuid4\n \n     def __init__(self):\n@@ -18,7 +18,7 @@\n         )\n         self.storage_path.mkdir(parents=True, exist_ok=True)\n \n-        self.create_redis_pool = Config.DEFAULT_REDIS_POOL\n+        self.redis_from_url = Config.DEFAULT_REDIS_FROM_URL\n         self.min_thumb_size = self.DEFAULT_MIN_THUMB_SIZE\n         self.redis_host = self.DEFAULT_REDIS_HOST\n         self.uuid_generator = Config.DEFAULT_UUID_GENERATOR\n", "issue": "Update asgi look examples to use aioredis 2\nA new major vesion of aioredis was released, and it has some api changes.\r\nThis is the changelog https://github.com/aio-libs/aioredis-py/blob/master/CHANGELOG.md\n", "before_files": [{"content": "import os\nimport pathlib\nimport uuid\n\nimport aioredis\n\n\nclass Config:\n    DEFAULT_CONFIG_PATH = '/tmp/asgilook'\n    DEFAULT_MIN_THUMB_SIZE = 64\n    DEFAULT_REDIS_HOST = 'redis://localhost'\n    DEFAULT_REDIS_POOL = aioredis.create_redis_pool\n    DEFAULT_UUID_GENERATOR = uuid.uuid4\n\n    def __init__(self):\n        self.storage_path = pathlib.Path(\n            os.environ.get('ASGI_LOOK_STORAGE_PATH', self.DEFAULT_CONFIG_PATH)\n        )\n        self.storage_path.mkdir(parents=True, exist_ok=True)\n\n        self.create_redis_pool = Config.DEFAULT_REDIS_POOL\n        self.min_thumb_size = self.DEFAULT_MIN_THUMB_SIZE\n        self.redis_host = self.DEFAULT_REDIS_HOST\n        self.uuid_generator = Config.DEFAULT_UUID_GENERATOR\n", "path": "examples/asgilook/asgilook/config.py"}, {"content": "import msgpack\n\n\nclass RedisCache:\n    PREFIX = 'asgilook:'\n    INVALIDATE_ON = frozenset({'DELETE', 'POST', 'PUT'})\n    CACHE_HEADER = 'X-ASGILook-Cache'\n    TTL = 3600\n\n    def __init__(self, config):\n        self._config = config\n\n        # NOTE(vytas): To be initialized upon application startup (see the\n        #   method below).\n        self._redis = None\n\n    async def _serialize_response(self, resp):\n        data = await resp.render_body()\n        return msgpack.packb([resp.content_type, data], use_bin_type=True)\n\n    def _deserialize_response(self, resp, data):\n        resp.content_type, resp.data = msgpack.unpackb(data, raw=False)\n        resp.complete = True\n        resp.context.cached = True\n\n    async def process_startup(self, scope, event):\n        if self._redis is None:\n            self._redis = await self._config.create_redis_pool(self._config.redis_host)\n\n    async def process_request(self, req, resp):\n        resp.context.cached = False\n\n        if req.method in self.INVALIDATE_ON:\n            return\n\n        key = f'{self.PREFIX}/{req.path}'\n        data = await self._redis.get(key)\n        if data is not None:\n            self._deserialize_response(resp, data)\n            resp.set_header(self.CACHE_HEADER, 'Hit')\n        else:\n            resp.set_header(self.CACHE_HEADER, 'Miss')\n\n    async def process_response(self, req, resp, resource, req_succeeded):\n        if not req_succeeded:\n            return\n\n        key = f'{self.PREFIX}/{req.path}'\n\n        if req.method in self.INVALIDATE_ON:\n            await self._redis.delete(key)\n        elif not resp.context.cached:\n            data = await self._serialize_response(resp)\n            await self._redis.set(key, data, expire=self.TTL)\n", "path": "examples/asgilook/asgilook/cache.py"}], "after_files": [{"content": "import os\nimport pathlib\nimport uuid\n\nimport aioredis\n\n\nclass Config:\n    DEFAULT_CONFIG_PATH = '/tmp/asgilook'\n    DEFAULT_MIN_THUMB_SIZE = 64\n    DEFAULT_REDIS_HOST = 'redis://localhost'\n    DEFAULT_REDIS_FROM_URL = aioredis.from_url\n    DEFAULT_UUID_GENERATOR = uuid.uuid4\n\n    def __init__(self):\n        self.storage_path = pathlib.Path(\n            os.environ.get('ASGI_LOOK_STORAGE_PATH', self.DEFAULT_CONFIG_PATH)\n        )\n        self.storage_path.mkdir(parents=True, exist_ok=True)\n\n        self.redis_from_url = Config.DEFAULT_REDIS_FROM_URL\n        self.min_thumb_size = self.DEFAULT_MIN_THUMB_SIZE\n        self.redis_host = self.DEFAULT_REDIS_HOST\n        self.uuid_generator = Config.DEFAULT_UUID_GENERATOR\n", "path": "examples/asgilook/asgilook/config.py"}, {"content": "import msgpack\n\n\nclass RedisCache:\n    PREFIX = 'asgilook:'\n    INVALIDATE_ON = frozenset({'DELETE', 'POST', 'PUT'})\n    CACHE_HEADER = 'X-ASGILook-Cache'\n    TTL = 3600\n\n    def __init__(self, config):\n        self._config = config\n        self._redis = self._config.redis_from_url(self._config.redis_host)\n\n    async def _serialize_response(self, resp):\n        data = await resp.render_body()\n        return msgpack.packb([resp.content_type, data], use_bin_type=True)\n\n    def _deserialize_response(self, resp, data):\n        resp.content_type, resp.data = msgpack.unpackb(data, raw=False)\n        resp.complete = True\n        resp.context.cached = True\n\n    async def process_startup(self, scope, event):\n        await self._redis.ping()\n\n    async def process_shutdown(self, scope, event):\n        await self._redis.close()\n\n    async def process_request(self, req, resp):\n        resp.context.cached = False\n\n        if req.method in self.INVALIDATE_ON:\n            return\n\n        key = f'{self.PREFIX}/{req.path}'\n        data = await self._redis.get(key)\n        if data is not None:\n            self._deserialize_response(resp, data)\n            resp.set_header(self.CACHE_HEADER, 'Hit')\n        else:\n            resp.set_header(self.CACHE_HEADER, 'Miss')\n\n    async def process_response(self, req, resp, resource, req_succeeded):\n        if not req_succeeded:\n            return\n\n        key = f'{self.PREFIX}/{req.path}'\n\n        if req.method in self.INVALIDATE_ON:\n            await self._redis.delete(key)\n        elif not resp.context.cached:\n            data = await self._serialize_response(resp)\n            await self._redis.set(key, data, ex=self.TTL)\n", "path": "examples/asgilook/asgilook/cache.py"}]}