改进 Upyun 初始化，将少连接的过程;

lib/carrierwave/storage/upyun.rb

@@ -22,35 +22,35 @@ module Storage
     #
     #
     class UpYun < Abstract
-      
+
       class Connection
         def initialize(options={})
           @upyun_username = options[:upyun_username]
           @upyun_password = options[:upyun_password]
           @upyun_bucket = options[:upyun_bucket]
           @connection_options     = options[:connection_options] || {}
           @host = options[:api_host] || 'http://v0.api.upyun.com'
-          @http = RestClient::Resource.new("#{@host}/#{@upyun_bucket}", 
-                                            :user => @upyun_username, 
+          @@http ||= RestClient::Resource.new("#{@host}/#{@upyun_bucket}",
+                                            :user => @upyun_username,
                                             :password => @upyun_password)
         end
-        
+
         def put(path, payload, headers = {})
-          @http["#{escaped(path)}"].put(payload, headers)
+          @@http["#{escaped(path)}"].put(payload, headers)
         end
-        
+
         def get(path, headers = {})
-          @http["#{escaped(path)}"].get(headers)
+          @@http["#{escaped(path)}"].get(headers)
         end
-        
+
         def delete(path, headers = {})
-          @http["#{escaped(path)}"].delete(headers)
+          @@http["#{escaped(path)}"].delete(headers)
         end
-        
+
         def post(path, payload, headers = {})
-          @http["#{escaped(path)}"].post(payload, headers)
+          @@http["#{escaped(path)}"].post(payload, headers)
         end
-        
+
         def escaped(path)
           CGI.escape(path)
         end
@@ -116,7 +116,7 @@ def url
             nil
           end
         end
-        
+
         def content_type
           headers[:content_type]
         end
@@ -155,8 +155,8 @@ def uy_connection
             if @uy_connection
               @uy_connection
             else
-              config = {:upyun_username => @uploader.upyun_username, 
-                :upyun_password => @uploader.upyun_password, 
+              config = {:upyun_username => @uploader.upyun_username,
+                :upyun_password => @uploader.upyun_password,
                 :upyun_bucket => @uploader.upyun_bucket
               }
               config[:api_host] = @uploader.upyun_api_host if @uploader.respond_to?(:upyun_api_host)