Use password from redis+sentinel uri

If a password is provided in the redis+sentinel uri
pass it on to the Sentinel object.

doc/source/storage-url.rst

@@ -36,9 +36,13 @@ Memcached
 Redis
  Requires the location of the redis server and optionally the database number.
  :code:`redis://localhost:6379` or :code:`redis://localhost:6379/1` (for database `1`)
+ If the database is password protected the password can be provided in the url, for example
+ :code:`redis://:foobared@localhost:6379`.
 
 Redis with Sentinel
  Requires the location(s) of the redis sentinal instances and the `service-name`
  that is monitored by the sentinels.
  :code:`redis+sentinel://localhost:26379/my-redis-service`
  or :code:`redis+sentinel://localhost:26379,localhost:26380/my-redis-service`
+ If the database is password protected the password can be provided in the url, for example
+ :code:`redis+sentinel://:foobared@localhost:26379/my-redis-service`.

limits/storage.py

@@ -397,7 +397,10 @@ def __init__(self, uri, **options):
 
         parsed = urllib.parse.urlparse(uri)
         sentinel_configuration = []
-        for loc in parsed.netloc.split(","):
+        password = None
+        if parsed.password:
+            password = parsed.password
+        for loc in parsed.netloc[parsed.netloc.find("@")+1:].split(","):
             host, port = loc.split(":")
             sentinel_configuration.append((host, int(port)))
         self.service_name = (
@@ -408,7 +411,8 @@ def __init__(self, uri, **options):
             raise ConfigurationError("'service_name' not provided")
         self.sentinel = get_dependency("redis.sentinel").Sentinel(
             sentinel_configuration,
-            socket_timeout=options.get("socket_timeout", 0.2)
+            socket_timeout=options.get("socket_timeout", 0.2),
+            password=password
         )
         self.initialize_storage()
         super(RedisSentinelStorage, self).__init__()

tests/test_storage.py

@@ -5,6 +5,7 @@
 from uuid import uuid4
 
 import hiro
+import mock
 import redis
 import redis.lock
 from redis.sentinel import Sentinel
@@ -31,6 +32,9 @@ def test_storage_string(self):
         self.assertTrue(isinstance(storage_from_string("redis+sentinel://localhost:26379/localhost-redis-sentinel"), RedisSentinelStorage))
         self.assertRaises(ConfigurationError, storage_from_string, "blah://")
         self.assertRaises(ConfigurationError, storage_from_string, "redis+sentinel://localhost:26379")
+        with mock.patch("limits.storage.get_dependency") as get_dependency:
+            self.assertTrue(isinstance(storage_from_string("redis+sentinel://:foobared@localhost:26379/localhost-redis-sentinel"), RedisSentinelStorage))
+            self.assertEqual(get_dependency().Sentinel.call_args[1]['password'], 'foobared')
 
     def test_storage_check(self):
         self.assertTrue(storage_from_string("memory://").check())