.. _errorhandler:

ErrorHandler
============

默认配置下，有error发生时，会返回 HTTP 500 错误.

你可以通过 ErrorHandler 来定制行为:

.. code-block:: diff

 func (i *ServiceInitializer) InitService(s turbo.Servable) error {
 +	 s.RegisterComponent("errorHandler", errorHandler)
     return nil
 }

 +var errorHandler turbo.ErrorHandlerFunc = func (resp http.ResponseWriter, req *http.Request, err error) {
 +  	resp.Write([]byte("from errorHandler:" + err.Error()))
 +}

编辑 "yourservice/service.yaml":

.. code-block:: diff

 +errorhandler: errorHandler

重启并测试(修改 "SayHello" 方法的代码，让它返回了一个error)::

 $ curl -w "\n" "http://localhost:8081/hello?your_name=zx"
 from errorHandler:rpc error: code = Unknown desc = error!