siterpc/client.go

package siterpc

import (
	"encoding/json"
	"errors"
	"strconv"
	"time"

	"git.tetele.net/tgo/crypter"

	"github.com/golang/protobuf/proto"
)

/**
 * 由配置key取对应value
 * 请求及回均加密验签
 * 2021/01/20
 * GZ
 */
func GetConfigItem(site_id, dbname, key string, url ...string) (*SiteConfigItemRes, error) {
	ret, err := getconfig(site_id, dbname, key, url...)
	if err != nil {
		return ret, err
	}
	if ret.Exist == false {
		return ret, errors.New("no data")
	}
	return ret, err
}
func GetConfig(site_id, dbname, key string, url ...string) (*SiteConfigItemRes, error) {
	return getconfig(site_id, dbname, key, url...)
}

func getconfig(site_id, dbname, key string, url ...string) (*SiteConfigItemRes, error) {

	conn, err := rpc_server_conn(url...)
	if err != nil {
		return nil, err
	}
	defer conn.Close()

	arg := SiteConfigItemReqArg{site_id, dbname, key}

	data_json, err := json.Marshal(arg)
	if err != nil {
		return nil, err
	}
	now_int64 := time.Now().Unix()

	encryData := crypter.DesEn(string(data_json), "confdata")

	now := strconv.FormatInt(now_int64, 10)

	sign := Sign(encryData, now)

	req := &Request{proto.String(encryData), proto.String(now), proto.String(sign), nil}

	res := &Response{}

	err = conn.GetConfig(req, res)

	if err != nil {
		return nil, err
	}

	res_data := res.GetData()

	if res_data != "" {

		time_int64, err := strconv.ParseInt(res.GetTime(), 10, 64)
		if err != nil {
			return nil, err
		}

		now_int64 = time.Now().Unix()

		if now_int64-time_int64 > 10 || time_int64-now_int64 > 10 {
			//时间误差前后10秒，返回
			return nil, errors.New("返回时间错误")
		}

		check_sign := CheckSign(res.GetSign(), res_data, res.GetTime())
		if !check_sign {
			return nil, errors.New("返回数据签名错误")
		}

		//解密
		res_data_de := crypter.DesDe(res_data, "confdata")

		var res_arr SiteConfigItemRes

		err = json.Unmarshal([]byte(res_data_de), &res_arr)

		if err != nil {
			return nil, err
		}
		return &res_arr, nil
	}

	return nil, nil
}