Store sessions in binary (25% space saving, and same speed to load/st…

…ore)

lib/mongo_session_store/mongo.rb

@@ -29,7 +29,7 @@ def save
 
           collection.save(
             :_id        => @_id,
-            :data       => @data,
+            :data       => BSON::Binary.new(@data),
             :created_at => @created_at,
             :updated_at => @updated_at
           )
@@ -132,12 +132,12 @@ def destroy_session(env, session_id, options)
         end
 
         def pack(data)
-          [Marshal.dump(data)].pack("m*")
+          Marshal.dump(data)
         end
 
         def unpack(packed)
           return nil unless packed
-          Marshal.load(packed.unpack("m*").first)
+          Marshal.load(StringIO.new(packed.to_s))
         end
 
     end

lib/mongo_session_store/mongo_mapper.rb

@@ -9,7 +9,7 @@ class Session
           include MongoMapper::Document
           set_collection_name MongoSessionStore.collection_name
           key :_id, String
-          key :data, String, :default => [Marshal.dump({})].pack("m*")
+          key :data, Binary, :default => Marshal.dump({})
           timestamps!
         end
 
@@ -69,12 +69,12 @@ def destroy_session(env, session_id, options)
           end
 
           def pack(data)
-            [Marshal.dump(data)].pack("m*")
+            Marshal.dump(data)
           end
 
           def unpack(packed)
             return nil unless packed
-            Marshal.load(packed.unpack("m*").first)
+            Marshal.load(StringIO.new(packed.to_s))
           end
 
       end

lib/mongo_session_store/mongoid.rb

@@ -12,7 +12,7 @@ class Session
 
           identity :type => String
 
-          field :data, :type => String, :default => [Marshal.dump({})].pack("m*")
+          field :data, :type => BSON::Binary, :default => BSON::Binary.new(Marshal.dump({}))
         end
 
         # The class used for session storage.
@@ -73,12 +73,12 @@ def get_session_model(env, sid)
           end
 
           def pack(data)
-            [Marshal.dump(data)].pack("m*")
+            BSON::Binary.new(Marshal.dump(data))
           end
 
           def unpack(packed)
             return nil unless packed
-            Marshal.load(packed.unpack("m*").first)
+            Marshal.load(StringIO.new(packed.to_s))
           end
 
       end