JiCangHai/PingTai/DSWeb.Common/DB/BaseDbContext.cs

using DSWeb.Common.Helper;
using log4net;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data.Entity;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DSWeb.Common.DB
{
    public class BaseDbContext : DbContext
    {
        private ILog log = LogManager.GetLogger("BaseDbContext");

        public BaseDbContext(string conn) : base(conn)
        {
            var getUrl = ConfigurationManager.AppSettings["NacosUrl"];
            var tenant = ConfigurationManager.AppSettings["NacosTenant"];
            var group = ConfigurationManager.AppSettings["NacosGroup"];
            if (!string.IsNullOrEmpty(getUrl))
            {
                if (getUrl.EndsWith("/"))
                {
                    getUrl = getUrl.Substring(0, getUrl.Length - 1);
                }

                var url = getUrl + $"/nacos/v1/cs/configs?dataId={conn}&group={group}&tenant={tenant}";
                try
                {
                    var connStr = WebRequestHelper.DoGet(url, timeout: 2000);
                    log.Debug($"从{url}获取数据库连接串：{connStr}");
                    this.Database.Connection.ConnectionString = connStr;
                }
                catch
                {
                    log.Error($"从{url}数据库连接串获取失败，将使用本地配置");
                }
            }
        }
    }
}