Baidu リッチ テキストをダウンロードから実行までうまく使用する方法

UE.Editor.prototype._bkGetActionUrl = UE.Editor.prototype.getActionUrl;
    UE.Editor.prototype.getActionUrl = function(action) {
        if (action == 'uploadimage' || action == 'uploadscrawl' || action == 'uploadimage' || action=='uploadvideo') {
            return "${imageServer }/front/person/uploadProjectDetailImg.htm";
        } else if (action == 'uploadvideo') {
            return 'http://a.b.com/video.php';
        } else {
            return this._bkGetActionUrl.call(this, action);
        }
    }
    UE.Editor.prototype._bkGetContentLength = UE.Editor.prototype.getContentLength;
    UE.Editor.prototype.getContentLength = function(){
        return this.getContent().length;
    }