text: /**
   * Created by zhangbo21 on 14-9-2.
   */
  /*
   * getKfContent : 将image的src从base64替换为文件名
   * param : callback -- 回调函数 其参数为替换之后的内容
   * return : void
   * */
  
  UE.Editor.prototype.getKfContent = function(callback){
  
      var me = this;
      var actionUrl = me.getActionUrl(me.getOpt('scrawlActionName')),
          params = UE.utils.serializeParam(me.queryCommandValue('serverparam')) || '',
          url = UE.utils.formatUrl(actionUrl + (actionUrl.indexOf('?') == -1 ? '?':'&') + params);
  
      // 找到所有的base64
      var count = 0;
      var imgs =me.body.getElementsByTagName('img');
      var base64Imgs = [];
      UE.utils.each(imgs, function(item){
          var imgType = item.getAttribute('src').match(/^[^;]+/)[0];
          if ( imgType === 'data:image/png') {
              base64Imgs.push(item);
          }    
      });
  
      if (base64Imgs.length == 0){
          execCallback();
      } else {
          UE.utils.each(base64Imgs, function(item){
  
              var opt ={};
              opt[me.getOpt('scrawlFieldName')]= item.getAttribute('src').replace(/^[^,]+,/, '');
              opt.onsuccess = function(xhr){
                  var json = UE.utils.str2json(xhr.responseText),
                      url = me.options.scrawlUrlPrefix + json.url;
  
                  item.setAttribute('src', url);
                  item.setAttribute('_src', url);
  
                  count++;
  
                  execCallback();
              }
              opt.onerror = function(err){
                  console.error(err);
                  count++;
  
                  execCallback();
              }
  
  
              UE.ajax.request(url, opt);
  
          });
      }
  
      function execCallback(){
          if (count >= base64Imgs.length) {
              ue.sync();
              callback(me.getContent());
          }
      }
  
  };