function prms_gapi_auth(){
            var df = $.Deferred();
            gapi.auth.authorize(
            {client_id: constants.gapi.client_id, scope: 'https://www.googleapis.com/auth/drive', immediate: true}, function(res){
                if(!gapi.auth || !gapi.auth.getToken()){
                     df.reject("gapi.auth not exists");
                }
                for(var i=0;i<10000;i++){
                    var s = "aaaa";
                    s+="bbbbb";
                }
                console.log("auth success");
                df.resolve(res);
            }
            );
            return df.promise();
        }

        function prms_gapi_load_by(api,v){
            var df = $.Deferred();
            gapi.client.setApiKey(constants.gapi.api_key);
            gapi.client.load(api, v, function(){
                console.log("load success:" + api);
                df.resolve("loaded:" + api);
                });
            return df.promise();
        }
        /*
         * google drive file list( filter:folder id )
         */
        function list_files_with(cond){
            var df = $.Deferred();
            var initialRequest = gapi.client.drive.files.list(
                {q:"'0B3pnnGKgIx1uWlZrY3RiTHBHcTA' in parents"}
            );
           initialRequest.execute(function(resp){
            var cache = {};
            console.log(resp.items);

              $(resp.items).each(function(ix,v){
                    cache[v.id] = v;
                });
               console.log(cache);
               df.resolve(cache);
            });
           return df.promise();
        }
        /**
         * google drive sdk (create folder sample)
         */
        function createFolder(folderName){
            var body = {
              'title': folderName,
              'mimeType': "application/vnd.google-apps.folder"
            };
            var request = gapi.client.drive.files.insert({
              'resource': body
            });
            request.execute(function(resp) {
              console.log('Folder ID: ' + resp.id);
            });
        }

        function load_APIs(){
            prms_gapi_auth().done(function(res){
                console.log("auth callback");
                $.when(prms_gapi_load_by("drive","v2")).then(function(data){
                    //事前条件： authorize が完了    
                    console.log(data);
                })    
            });
        }