post提交主订单数据(gateway)实现httpapi

syntax = "proto3";
package services;
import "google/protobuf/timestamp.proto"; //引入timestamp的proto文件

//商品模型
message ProdModel {
    int32 prod_id = 1;
    string prod_name = 2;
    float prod_price = 3;
}

message OrderMain {
    int32 order_id = 1; //订单id，数字
    int32 user_id = 3; //购买者id
    float order_money = 4; //商品金额
    google.protobuf.Timestamp order_time = 5; //定义时间戳字段
}syntax = "proto3";
package se