Postprocessor

默认配置下,service返回的对象被转换成了JSON格式,然后直接作为API的返回值返回。

Postprocessor用来处理后端返回的对象(当然你也可以顺便干点别的事),你可以自由定制处理的方式。

下面例子中,将会修改 API “/eat_apple/{num:[0-9]+}” 的返回结果:

编辑 “yourservice/grpcapi/component/components.go”:

func RegisterComponents(s *turbo.GrpcServer) {
+       s.RegisterComponent("postEatApple", postEatApple)
}

+var postEatApple turbo.Postprocessor = func (resp http.ResponseWriter, req *http.Request, serviceResp interface{}) {
+      sr := serviceResp.(*proto.EatAppleResponse)
+      resp.Write([]byte("this is from postprocesser, message=" + sr.Message))
+}

编辑 “yourservice/service.yaml”:

+postprocessor:
+  - GET /eat_apple/{num:[0-9]+} postEatApple

重启服务并测试:

$ curl -w "\n" "http://localhost:8081/eat_apple/5"
this is from postprocesser, message=Good taste! Apple num=5