code: function urlToCdn(env, url) {
      if(env.serverNum("Image") > 0) { //系统中存在Image转换服务器
          let serverId = (env.facade.util.hashCode(url) % env.serverNum("Image")) + 1;
          return `${env.options.UrlHead}://${env.serversInfo["Image"][serverId].webserver.mapping}:${env.serversInfo["Image"][serverId].webserver.port}/socialImg?m=${encodeURIComponent(url)}`;
      } else {
          return url;
      }
  }
docs: URL转CDN地址
  @param {CoreOfBase} env