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  • 定时请求微信Access_Token

            /// <summary>
            /// 设置缓存并在缓存超时两分钟前重新请求
            /// </summary>
            private void SetAndAutoRefreshAccessToken()
            {
                object oToken = HttpContext.Current.Cache[WxConst.ACCESS_TOKEN];
                string sToken = "";
                int iExpiresIn = 0;
                if (oToken == null)
                {
                    sToken = GetAccessToken(out iExpiresIn);
    
                    // 缓存到期前更新缓存
                    HttpContext.Current.Cache.Insert(WxConst.ACCESS_TOKEN, sToken, null, DateTime.Now.AddSeconds(iExpiresIn), TimeSpan.Zero,
                        (string key, CacheItemUpdateReason reason, out object expensiveObject, out CacheDependency dependency, out DateTime absoluteExpiration, out TimeSpan slidingExpiration) =>
                        {
                            sToken = GetAccessToken(out iExpiresIn);
                            // 设置缓存有效时间为微信access_token有效斯减120秒
                            iExpiresIn = iExpiresIn - 120;
    
                            expensiveObject = sToken;
                            dependency = null;
                            absoluteExpiration = DateTime.Now.AddSeconds(iExpiresIn);
                            slidingExpiration = TimeSpan.Zero;
                        }
                        );
                }
            }
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  • 原文地址:https://www.cnblogs.com/coder-soldier/p/6901068.html
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