rpc/order/client.go

package order

import (
	"crypto/md5"
	"encoding/hex"
	"encoding/json"
	"errors"
	"log"
	"strconv"
	"strings"
	"time"

	"git.tetele.net/tgo/crypter"

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

type OrderCreateRes struct {
	OrderSn string
}

func Create(dbname, site_id string, data map[string]string, url ...string) (*OrderCreateRes, error) {

	var order_rpc_url string = "127.0.0.1:7973"
	if len(url) > 0 && url[0] != "" {
		order_rpc_url = url[0]
	}
	conn, _, err := DialOrderService("tcp", order_rpc_url)
	if err != nil {
		return nil, err
	}
	defer conn.Close()

	data["dbname"] = dbname
	data["site_id"] = site_id

	data_json, err := json.Marshal(data)
	if err != nil {
		return nil, err
	}

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

	now_int64 := time.Now().Unix()

	now := strconv.FormatInt(now_int64, 10)

	sign := Sign(encryData, now)

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

	res := &CreateResponse{}

	err = conn.Create(req, res)

	if err != nil {
		return nil, err
	}

	return HandleRes(res)

	// return map[string]interface{}{
	// 	"code":     res.GetCode(),
	// 	"msg":      res.GetMsg(),
	// 	"order_sn": res.GetOrderSn()}, err
}

func CreateByChannel(dbname, site_id string, data map[string]string, url ...string) (*OrderCreateRes, error) {

	var order_rpc_url string = "127.0.0.1:7973"
	if len(url) > 0 && url[0] != "" {
		order_rpc_url = url[0]
	}
	conn, _, err := DialOrderService("tcp", order_rpc_url)
	if err != nil {
		return nil, err
	}
	defer conn.Close()

	data["dbname"] = dbname
	data["site_id"] = site_id
	data["source"] = "channel"

	data_json, err := json.Marshal(data)
	if err != nil {
		return nil, err
	}

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

	now := strconv.FormatInt(time.Now().Unix(), 10)

	sign := Sign(encryData, now)

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

	res := &CreateResponse{}

	err = conn.Create(req, res)

	if err != nil {
		return nil, err
	}

	return HandleRes(res)
	// return map[string]interface{}{
	// 	"code":     res.GetCode(),
	// 	"msg":      res.GetMsg(),
	// 	"order_sn": res.GetOrderSn()}, err
}

func CreateByCart(dbname, site_id string, data map[string]interface{}, url ...string) (*OrderCreateRes, error) {

	var order_rpc_url string = "127.0.0.1:7973"
	if len(url) > 0 && url[0] != "" {
		order_rpc_url = url[0]
	}
	conn, _, err := DialOrderService("tcp", order_rpc_url)
	if err != nil {
		return nil, err
	}
	defer conn.Close()

	data["dbname"] = dbname
	data["site_id"] = site_id

	data_json, err := json.Marshal(data)
	if err != nil {
		return nil, err
	}

	log.Println(string(data_json))

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

	now := strconv.FormatInt(time.Now().Unix(), 10)

	sign := Sign(encryData, now)

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

	res := &CreateResponse{}

	err = conn.CreateByCart(req, res)

	if err != nil {
		return nil, err
	}

	return HandleRes(res)
	// return map[string]interface{}{
	// 	"code":     res.GetCode(),
	// 	"msg":      res.GetMsg(),
	// 	"order_sn": res.GetOrderSn()}, err
}

/**
 * 签名
 */
func Sign(data string, salt string) string {

	var build strings.Builder

	build.WriteString(data)
	build.WriteString(salt)
	build.WriteString("neworder")

	data_str := build.String()

	h := md5.New()
	h.Write([]byte(data_str))             // 需要加密的字符串
	return hex.EncodeToString(h.Sum(nil)) // 输出加密结果

}

/**
 * 验证签名
 */
func CheckSign(sign_str, data, salt string) bool {
	sign := Sign(data, salt)
	if strings.Compare(sign_str, sign) > -1 {
		return true
	}
	return false
}

/**
 * 处理返回结果
 */
func HandleRes(res *CreateResponse) (*OrderCreateRes, error) {

	res_data := res.GetData()

	if res_data == "" {

		return nil, errors.New("未收到收据")
	}

	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, "ordernew")

	var res_arr OrderCreateRes

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

	if err != nil {
		return nil, err
	}

	return &res_arr, nil
}