Support IPv6 URLs

Fix: #1100

Author: byroot

CHANGELOG.md

@@ -1,5 +1,6 @@
 # Unreleased
 
+* Support IPv6 URLs.
 * Add `Redis#with` for better compatibility with `connection_pool` usage.
 * Fix the block form of `multi` called inside `pipelined`. Previously the `MUTLI/EXEC` wouldn't be sent. See #1073.
 

lib/redis/client.rb

@@ -464,7 +464,7 @@ def _parse_options(options)
           defaults[:path] = uri.path
         when "redis", "rediss"
           defaults[:scheme]   = uri.scheme
-          defaults[:host]     = uri.host if uri.host
+          defaults[:host]     = uri.host.sub(/\A\[(.*)\]\z/, '\1') if uri.host
           defaults[:port]     = uri.port if uri.port
           defaults[:username] = CGI.unescape(uri.user) if uri.user && !uri.user.empty?
           defaults[:password] = CGI.unescape(uri.password) if uri.password && !uri.password.empty?

test/url_param_test.rb

@@ -135,6 +135,12 @@ def test_defaults_to_localhost
     assert_equal "127.0.0.1", redis._client.host
   end
 
+  def test_ipv6_url
+    redis = Redis.new url: "redis://[::1]"
+
+    assert_equal "::1", redis._client.host
+  end
+
   def test_user_and_password
     redis = Redis.new(url: 'redis://johndoe:[email protected]:999/2')