Allow pings in PubSub

According to https://redis.io/topics/pubsub, “The commands that are allowed in the context of a subscribed client are SUBSCRIBE, PSUBSCRIBE, UNSUBSCRIBE, PUNSUBSCRIBE, PING and QUIT.”

According to https://redis.io/commands/ping, “If the client is subscribed to a channel or a pattern, it will instead return a multi-bulk with a "pong" in the first position and an empty bulk in the second position, unless an argument is provided in which case it returns a copy of the argument.”

1 files changed, 13 insertions, 0 deletions

diff --git a/redis/client.py b/redis/client.py
index 79e94d0..db68378 100755
--- a/redis/client.py
+++ b/redis/client.py
@@ -2517,6 +2517,12 @@ class PubSub(object):
             return self.handle_message(response, ignore_subscribe_messages)
         return None
 
+    def ping(self):
+        """
+        Ping the Redis server
+        """
+        return self.execute_command('PING')
+
     def handle_message(self, response, ignore_subscribe_messages=False):
         """
         Parses a pub/sub message. If the channel or pattern was subscribed to
@@ -2531,6 +2537,13 @@ class PubSub(object):
                 'channel': response[2],
                 'data': response[3]
             }
+        elif message_type == 'pong':
+            message = {
+                'type': message_type,
+                'pattern': None,
+                'channel': None,
+                'data': response[1]
+            }
         else:
             message = {
                 'type': message_type,