public static string GetAccessTokenAndRefresh()
{
lock (locker)
{
RedisHelper redis = new RedisHelper();
WechatAccessToken token = redis.StringGet <WechatAccessToken>("WechatAccessToken");
if (token == null)
{
token = new WechatAccessToken();
AccessTokenResponseMessage message = GetAccessTokenFromWechat();
token.AccessToken = message.AccessToken;
token.ExpiresIn = message.ExpiresIn;
token.UpdateTime = DateTime.Now;
redis.StringSet <WechatAccessToken>("WechatAccessToken", token);
}
else
{
TimeSpan ts = DateTime.Now - token.UpdateTime;
if (ts.TotalMinutes > 90)
{
AccessTokenResponseMessage message = GetAccessTokenFromWechat();
token.AccessToken = message.AccessToken;
token.ExpiresIn = message.ExpiresIn;
token.UpdateTime = DateTime.Now;
redis.StringSet <WechatAccessToken>("WechatAccessToken", token);
}
}
return(token.AccessToken);
}
}
/// <summary>
/// 刷新票据凭证
/// </summary>
/// <param name="accessToken"></param>
/// <returns></returns>
public static string RefreshAccessToken(string accessToken)
{
lock ( locker )
{
if (WechatApi.AccessToken != accessToken)
{
return(WechatApi.AccessToken);
}
AccessTokenResponseMessage response = WechatApi.GetAccessTokenFromWechat();
WechatAccessToken token = new WechatAccessToken();
token.AppId = ConfigurationManager.AppSettings["AppId"];
token.AccessToken = response.AccessToken;
token.ExpiresIn = response.ExpiresIn;
token.UpdateTime = DateTime.Now;
RedisHelper redis = new RedisHelper();
redis.StringSet <WechatAccessToken>(token.AppId, token);
WechatApi.AccessToken = token.AccessToken;
return(WechatApi.AccessToken);
}
}
/// <summary>
/// 获取票据凭证
/// </summary>
/// <returns></returns>
public static string GetAccessToken()
{
lock ( locker )
{
if (string.IsNullOrEmpty(WechatApi.AccessToken))
{
WechatAccessToken token = WechatApi.GetAccessTokenFromDb();
if (token == null)
{
AccessTokenResponseMessage response = WechatApi.GetAccessTokenFromWechat();
token = new WechatAccessToken();
token.AppId = ConfigurationManager.AppSettings["AppId"];
token.AccessToken = response.AccessToken;
token.ExpiresIn = response.ExpiresIn;
token.UpdateTime = DateTime.Now;
RedisHelper redis = new RedisHelper();
redis.StringSet <WechatAccessToken>(token.AppId, token);
WechatApi.AccessToken = token.AccessToken;
}
else
{
WechatApi.AccessToken = token.AccessToken;
}
}
return(WechatApi.AccessToken);
}
}
/// <summary>
/// 从微信服务器获取票据凭证
/// </summary>
/// <returns></returns>
public static AccessTokenResponseMessage GetAccessTokenFromWechat()
{
string url = string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}",
ConfigurationManager.AppSettings["AppId"],
ConfigurationManager.AppSettings["AppSecret"]);
LogHelper.Info("正在调用接口获取票据凭证...");
AccessTokenResponseMessage response = WechatApi.GetWechatApi <AccessTokenResponseMessage>(url);
LogHelper.Info("已获取票据凭证。");
if (response.ErrorCode.HasValue && response.ErrorCode.Value != 0)
{
throw new WechatApiInvokeException(response.ErrorCode.Value, response.ErrorMessage, url);
}
return(response);
}
