Golang Vars示例

示例#1

文件： region.go 项目： PHL-Crime-Mapper/phl-crime-mapper-v2.0

func GetRegionHandler(w http.ResponseWriter, r *http.Request) {
	regionName := mux.Vars(r)["name"]

	db, err := sql.Open("postgres", os.Getenv("DATABASE_URL"))
	if err != nil {
		w.WriteHeader(500)
		errResp := NewResponse(nil, err.Error())
		errRespRaw, _ := json.Marshal(errResp)
		w.Write(errRespRaw)
		return
	}

	var region string
	err = db.QueryRow(`SELECT geo FROM regions WHERE name = $1`, regionName).
		Scan(&region)
	if err != nil && err.Error() == "sql: no rows in result set" {
		w.WriteHeader(404)
		errResp := NewResponse(nil, "region does not exist")
		errRespRaw, _ := json.Marshal(errResp)
		w.Write(errRespRaw)
		return
	}

	rr := Response{
		Error:   "",
		Results: region,
	}
	var respRaw []byte
	respRaw, err = json.Marshal(rr)
	if err != nil {
		w.WriteHeader(500)
		errResp := NewResponse(nil, err.Error())
		errRespRaw, _ := json.Marshal(errResp)
		w.Write(errRespRaw)
		return
	}

	w.Write(respRaw)
}

示例#2

文件： region.go 项目： PHL-Crime-Mapper/phl-crime-mapper-v2.0

func SaveRegionHandler(w http.ResponseWriter, r *http.Request) {
	regionName := mux.Vars(r)["name"]

	reqRaw, err := ioutil.ReadAll(r.Body)
	if err != nil {
		w.WriteHeader(400)
		errResp := NewResponse(nil, err.Error())
		errRespRaw, _ := json.Marshal(errResp)
		w.Write(errRespRaw)
		return
	}
	r.Body.Close()

	var rb RequestBody
	err = json.Unmarshal(reqRaw, &rb)
	if err != nil {
		w.WriteHeader(400)
		errResp := NewResponse(nil, err.Error())
		errRespRaw, _ := json.Marshal(errResp)
		w.Write(errRespRaw)
		return
	}

	db, err := sql.Open("postgres", os.Getenv("DATABASE_URL"))
	if err != nil {
		w.WriteHeader(500)
		errResp := NewResponse(nil, err.Error())
		errRespRaw, _ := json.Marshal(errResp)
		w.Write(errRespRaw)
		return
	}

	now := time.Now().Format(time.RFC3339)
	name := strings.Replace(regionName, " ", "_", -1)

	_, err = db.Exec(`INSERT INTO regions ("name", "collection", "geo", "added_date") VALUES ($1, 'custom', $2, $3);`, name, rb.Region, now)
	if err != nil {
		w.WriteHeader(400)
		errResp := NewResponse(nil, "region name already exists")
		errRespRaw, _ := json.Marshal(errResp)
		w.Write(errRespRaw)
		return
	}

	rr := Response{
		Error:   "",
		Results: "/#user/" + name,
	}
	respRaw, err := json.Marshal(rr)
	if err != nil {
		w.WriteHeader(500)
		errResp := NewResponse(nil, err.Error())
		errRespRaw, _ := json.Marshal(errResp)
		w.Write(errRespRaw)
		return
	}

	w.Write(respRaw)

	return
}