/// <summary>
/// 获取微信API访问凭证。仅在需要时调用微信API接口，即：若凭证尚在有效期内，则直接取回上一次得到的凭证。
/// </summary>
/// <param name="accessToken"></param>
/// <param name="forceRenew">强制立即取新。这将废弃并替换旧的，而不管是否旧的令牌是否过期。</param>
/// <returns>微信API访问凭证</returns>
public string GetTicket(string accessToken, bool forceRenew = false)
{
//bool forceRenew = false;
if (forceRenew)
{
//立即过期
_JsapiTicketBags.SetExpired(accessToken);
}
else
{
forceRenew = _JsapiTicketBags.IsExpired(accessToken);
}
//forceRenew = CheckTokenExpire();
if (forceRenew)
{
lock (_lockApiCalling)
{
//再次检查，通常在等待上一锁释放期间，过期状态已经发生改变。若已改变，则不应再调用API去刷新Token！
if (_JsapiTicketBags.IsExpired(accessToken))
{
JsapiTicketJson json = JsapiTicketApi.GetJsapiTicket(accessToken).Result;
if (json != null &&
!string.IsNullOrEmpty(json.ticket))
{
_JsapiTicketBags.Store(accessToken, new JsapiTicketBag()
{
JsapiTicketJson = json,
AccessToken = accessToken,
CreateTime = DateTime.Now
});
}
}
}
}
return(_JsapiTicketBags.GetTicket(accessToken));
}
/// <summary>
/// 获取微信JSSDK访问凭证。仅在需要时调用微信JSSDK接口，即：若凭证尚在有效期内，则直接取回上一次得到的凭证。
/// </summary>
/// <param name="accessToken"></param>
/// <param name="forceRenew">强制立即取新。这将废弃并替换旧的，而不管是否旧的令牌是否过期。</param>
/// <returns>微信JSSDK访问凭证</returns>
private string GetTicket(string accessToken, bool forceRenew)
{
var appId = _options.AppId;
var cacheKey = GenerateCacheKey(appId);
if (!forceRenew)
{
if (_cache.TryGetValue(cacheKey, out string jsapiTicket))
{
return(jsapiTicket);
}
}
else
{
_cache.Remove(cacheKey);
}
try
{
var json = JsapiTicketApi.GetJsapiTicket(accessToken).Result;
if (json == null ||
string.IsNullOrWhiteSpace(json.ticket) ||
json.expires_in < 1 ||
json.expires_in > 7200)
{
throw WeixinJsapiTicketError.UnknownResponse();
}
else
{
var newJsapiTicket = json.ticket;
_cache.Set(cacheKey, newJsapiTicket, TimeSpan.FromSeconds(json.expires_in));
return(newJsapiTicket);
}
}
catch (Exception ex)
{
throw WeixinJsapiTicketError.GenericError(ex);
}
}
