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227 lines
4.5 KiB
227 lines
4.5 KiB
package coupon
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import (
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"crypto/md5"
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"encoding/hex"
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"encoding/json"
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"errors"
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"log"
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"strconv"
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"strings"
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"time"
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"git.tetele.net/tgo/crypter"
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"github.com/golang/protobuf/proto"
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)
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type AvailableReqArg struct {
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Dbname string `json:"dbname"`
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UserCouponId string `json:"user_coupon_id"`
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UserId string `json:"user_id"`
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ProductId string `json:"product_id"`
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}
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type AvailableRes struct {
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Available bool `json:"available"`
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Money string `json:"money"`
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Name string `json:"name"`
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}
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type UseReqArg struct {
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Dbname string `json:"dbname"`
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UserCouponId string `json:"user_coupon_id"`
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OrderSn string `json:"order_sn"`
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}
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type UseRes struct {
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Success bool
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}
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/**
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* 优惠券是否可用
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* @param data {"user_id":"","product_id":"","coupon_id":""}
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* @param return is_available,name,money,error
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*/
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func IsAvailable(dbname, user_id, product_id, user_coupon_id string, url ...string) (*AvailableRes, error) {
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var coupon_rpc_url string = "127.0.0.1:7972"
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if len(url) > 0 && url[0] != "" {
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coupon_rpc_url = url[0]
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}
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conn, _, err := DialCouponService("tcp", coupon_rpc_url)
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if err != nil {
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return nil, err
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}
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defer conn.Close()
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arg := AvailableReqArg{dbname, user_coupon_id, user_id, product_id}
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data_json, err := json.Marshal(arg)
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if err != nil {
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return nil, err
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}
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now_int64 := time.Now().Unix()
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encryData := crypter.DesEn(string(data_json), "conaapon")
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now := strconv.FormatInt(now_int64, 10)
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sign := Sign(encryData, now)
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req := &CouponRequest{proto.String(encryData), proto.String(now), proto.String(sign), nil}
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res := &CouponResponse{}
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err = conn.IsAvailable(req, res)
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if err != nil {
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log.Println("coupon rpc error:", err)
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return nil, err
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}
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res_data := res.GetData()
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if res_data != "" {
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time_int64, err := strconv.ParseInt(res.GetTime(), 10, 64)
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if err != nil {
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return nil, err
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}
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now_int64 = time.Now().Unix()
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if now_int64-time_int64 > 10 || time_int64-now_int64 > 10 {
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//时间误差前后10秒，返回
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return nil, errors.New("返回时间错误")
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}
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check_sign := CheckSign(res.GetSign(), res_data, res.GetTime())
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if !check_sign {
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return nil, errors.New("返回数据签名错误")
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}
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//解密
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res_data_de := crypter.DesDe(res_data, "conaapon")
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var res_arr AvailableRes
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err = json.Unmarshal([]byte(res_data_de), &res_arr)
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if err != nil {
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return nil, err
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}
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return &res_arr, nil
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}
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return nil, nil
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}
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/**
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* 使用优惠券
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* @param data {"user_coupon_id":"","order_sn":""}
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* @param return is_available,name,money,error
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*/
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func Use(dbname, user_coupon_id, order_sn string, url ...string) (*UseRes, error) {
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var coupon_rpc_url string = "127.0.0.1:7972"
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if len(url) > 0 && url[0] != "" {
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coupon_rpc_url = url[0]
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}
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conn, _, err := DialCouponService("tcp", coupon_rpc_url)
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if err != nil {
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return nil, err
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}
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defer conn.Close()
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arg := UseReqArg{dbname, user_coupon_id, order_sn}
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data_json, err := json.Marshal(arg)
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if err != nil {
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return nil, err
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}
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now_int64 := time.Now().Unix()
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encryData := crypter.DesEn(string(data_json), "conaapon")
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now := strconv.FormatInt(now_int64, 10)
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sign := Sign(encryData, now)
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req := &CouponRequest{proto.String(encryData), proto.String(now), proto.String(sign), nil}
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res := &CouponResponse{}
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err = conn.Use(req, res)
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if err != nil {
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log.Println("coupon rpc error:", err)
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return nil, err
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}
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res_data := res.GetData()
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if res_data != "" {
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time_int64, err := strconv.ParseInt(res.GetTime(), 10, 64)
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if err != nil {
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return nil, err
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}
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now_int64 = time.Now().Unix()
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if now_int64-time_int64 > 10 || time_int64-now_int64 > 10 {
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//时间误差前后10秒，返回
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return nil, errors.New("返回时间错误")
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}
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check_sign := CheckSign(res.GetSign(), res_data, res.GetTime())
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if !check_sign {
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return nil, errors.New("返回数据签名错误")
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}
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//解密
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res_data_de := crypter.DesDe(res_data, "conaapon")
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var res_arr UseRes
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err = json.Unmarshal([]byte(res_data_de), &res_arr)
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if err != nil {
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return nil, err
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}
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return &res_arr, nil
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}
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return nil, nil
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}
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/**
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* 签名
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*/
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func Sign(data string, salt string) string {
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var build strings.Builder
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build.WriteString(data)
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build.WriteString(salt)
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build.WriteString("cou$%po87n")
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data_str := build.String()
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h := md5.New()
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h.Write([]byte(data_str)) // 需要加密的字符串
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return hex.EncodeToString(h.Sum(nil)) // 输出加密结果
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}
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/**
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* 验证签名
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*/
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func CheckSign(sign_str, data, salt string) bool {
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sign := Sign(data, salt)
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if strings.Compare(sign_str, sign) > -1 {
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return true
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}
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return false
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}
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