Support not "/d/" path

lib/groonga/client.rb

@@ -222,7 +222,7 @@ def build_url(options)
       scheme = (options.delete(:protocol) || "gqtp").to_s
       host = options.delete(:host) || options.delete(:address) || "127.0.0.1"
       port = options.delete(:port) || default_port(scheme)
-      path = options.delete(:path)
+      path = options.delete(:path) || default_path(schema)
       user = options.delete(:user)
       password = options.delete(:password)
       if user and password
@@ -263,6 +263,15 @@ def default_port(scheme)
       end
     end
 
+    def default_path(scheme)
+      case scheme
+      when "http", "https"
+        "/d/"
+      else
+        nil
+      end
+    end
+
     def groonga_command_name?(name)
       /\A[a-zA-Z][a-zA-Z\d_]+\z/ === name.to_s
     end

lib/groonga/client/protocol/http/path-resolvable.rb

@@ -21,7 +21,12 @@ class HTTP
         module PathResolvable
           private
           def resolve_path(uri, path)
-            uri.path.chomp("/") + path
+            path_prefix = uri.path.chomp("/")
+            if path_prefix.empty?
+              path
+            else
+              path.sub(/\A\/d/) {path_prefix}
+            end
           end
         end
       end