code: function html2js(context) {
      var handler = require('html2js');
      var docRoot  = context.conf.documentRoot;
      var pathname = context.request.pathname;
      var file = docRoot + pathname.replace(/\.js$/, '');
      var data = fs.readFileSync(file, 'utf8');
      context.content = handler(data, {mode: 'format', wrap: true});
  }
docs: 转化tpl
  
  @inner
  @param {Object} context 执行上下文