sample http health checker with http package

main.go

package main

import (
	"net/http"
	_ "github.com/lib/pq"
	"github.com/astaxie/beego/orm"
	"encoding/json"
)


type response struct{
	rws int64
	statusCode int
	info map[string]int `json:"info"`
}


func init(){
	orm.RegisterDriver("postgres", orm.DRPostgres)
	orm.RegisterDataBase("default", "postgres", "postgresql://myUser:123@192.168.99.100:5432/test?sslmode=disable")
}

func main(){
	http.HandleFunc("/",health())
	http.ListenAndServe(":8080",nil)
}

func health() func(w http.ResponseWriter, r *http.Request){
	return func(w http.ResponseWriter,r *http.Request){
		var response=&response{}
		o := orm.NewOrm()
		o.Using("default")

		res,_:=o.Raw("select * from users").Exec()
		w.WriteHeader(200)
		w.Header().Set("Content-Type", "application/json")

		response.rws,_=res.RowsAffected()
		response.statusCode=200

		response.info=map[string]int{"statusCode":response.statusCode,"rows":int(response.rws)}

		j,_:=json.Marshal(response.info)

		w.Write(j)
	}
}