Go-endpoints default values annotations

ping.go

/*  app.yaml
application: ping
version: 1
runtime: go
api_version: go1

handlers:

- url: /_ah/spi/.*
  script: _go_app
*/
package ping

//	"appengine/datastore"
import (
	"github.com/crhym3/go-endpoints/endpoints"
	"net/http"
)

type Ping struct {
	Ttl int `json:"ttl" endpoints:"req"`
}

type Pong struct {
	Ttl int `endpoints: "d=20"`
}

type PingService struct{}

func (svc *PingService) Ping(r *http.Request, ping *Ping, pong *Pong) error {
	pong.Ttl = ping.Ttl
	return nil
}

func init() {
	pingService := &PingService{}
	api, err := endpoints.RegisterService(pingService,
		"ping", "v1", "Ping API", true)
	if err != nil {
		panic(err.Error())
	}
	info := api.MethodByName("Ping").Info()
	info.Name, info.HTTPMethod, info.Path, info.Desc =
		"Service.Ping", "GET", "ping", "Ping/Pong"

	endpoints.HandleHTTP()
}