/// <summary>
///【异步方法】获取可用Token
/// </summary>
/// <param name="componentAppId"></param>
/// <param name="getNewToken">是否强制重新获取新的Token</param>
/// <returns></returns>
public static async Task <PreAuthCodeResult> GetPreAuthCodeResultAsync(string componentAppId, bool getNewToken = false)
{
if (!CheckRegistered(componentAppId))
{
throw new WeixinOpenException(UN_REGISTER_ALERT);
}
var componentBag = TryGetItem(componentAppId);
using (Cache.BeginCacheLock(LockResourceName + ".GetPreAuthCodeResult", componentAppId))//同步锁
{
if (getNewToken || componentBag.PreAuthCodeExpireTime <= DateTime.Now)
{
//已过期，重新获取
var componentVerifyTicket = TryGetComponentVerifyTicket(componentAppId);
var accessToken = TryGetComponentAccessToken(componentAppId, componentBag.ComponentAppSecret, componentVerifyTicket);
var preAuthCodeResult = await ComponentApi.GetPreAuthCodeAsync(componentBag.ComponentAppId, accessToken);
componentBag.PreAuthCodeExpireTime = ApiUtility.GetExpireTime(preAuthCodeResult.expires_in);
componentBag.PreAuthCodeResult = preAuthCodeResult;
////TODO:这里有出现expires_in=0的情况，导致始终处于过期状态（也可能是因为参数过期等原因没有返回正确的数据，待观察）
//var expiresIn = componentBag.PreAuthCodeResult.expires_in > 0
// ? componentBag.PreAuthCodeResult.expires_in
// : 60 * 20;//默认为20分钟
//componentBag.PreAuthCodeExpireTime = DateTime.Now.AddSeconds(expiresIn);
}
}
return(componentBag.PreAuthCodeResult);
}
