gistfile1.txt

~/projects/redis-node-client(master) ⚡ redis-cli set test:c a
OK

~/projects/redis-node-client(master) ⚡ redis-cli set 'test: d' b
OK

~/projects/redis-node-client(master) ⚡ redis-cli keys '*'
1. "test:c"
2. "test: d"

~/projects/redis-node-client(master) ⚡ node show_keys.js 
object
[ { '0': 116
  , '1': 101
  , '2': 115
  , '3': 116
  , '4': 58
  , '5': 99
  , length: 6
  }
, { '0': 116
  , '1': 101
  , '2': 115
  , '3': 116
  , '4': 58
  , '5': 32
  , '6': 100
  , length: 7
  }
]
[ 'test:c', 'test: d' ]

show_keys.js

var sys = require('sys'),
  redis = require('./lib/redis-client');

var client = redis.createClient();
client.keys('*', function (err, reply) {
  sys.puts(typeof reply);
  sys.p(reply);
  redis.convertMultiBulkBuffersToUTF8Strings(reply);
  sys.p(reply);
  process.exit(0);
});