Add redis provider

disco/api/http.py

@@ -127,6 +127,7 @@ class HTTPClient(LoggingClass):
         self.limiter = RateLimiter()
         self.headers = {
             'Authorization': 'Bot ' + token,
+            'X-Disable-Ratelimits': '1',
         }
 
     def __call__(self, route, args=None, **kwargs):

disco/bot/providers/redis.py

@@ -0,0 +1,41 @@
+from __future__ import absolute_import
+
+import redis
+
+from itertools import izip
+
+from disco.util.serializer import Serializer
+from .base import BaseProvider, SEP_SENTINEL
+
+
+class RedisProvider(BaseProvider):
+    def __init__(self, config):
+        self.config = config
+
+    def load(self):
+        self.redis = redis.Redis(
+            host=self.config.get('host', 'localhost'),
+            port=self.config.get('port', 6379),
+            db=self.config.get('db', 0))
+
+    def exists(self, key):
+        return self.db.exists(key)
+
+    def keys(self, other):
+        count = other.count(SEP_SENTINEL) + 1
+        for key in self.db.scan_iter(u'{}*'.format(other)):
+            if key.count(SEP_SENTINEL) == count:
+                yield key
+
+    def get_many(self, keys):
+        for key, value in izip(keys, self.db.mget(keys)):
+            yield (key, Serializer.loads(self.format, value))
+
+    def get(self, key):
+        return Serializer.loads(self.format, self.db.get(key))
+
+    def set(self, key, value):
+        self.db.set(key, Serializer.dumps(self.format, value))
+
+    def delete(self, key, value):
+        self.db.delete(key)