/// <summary>
/// 获取当前账号的AccessToken
/// </summary>
/// <param name="wid"></param>
/// <param name="errorMessage"></param>
/// <returns></returns>
public AccessToken GetAccessToken(int wid, out string errorMessage)
{
lock (_obj)
{
try
{
var appInfo = _appInfoRepository.GetAppInfo(wid);
if (appInfo == null)
{
errorMessage = string.Format("当前系统无wid为{0}相应公众号的配置", wid);
return(null);
}
if (string.IsNullOrEmpty(appInfo.AppId) || string.IsNullOrEmpty(appInfo.AppSecret))
{
errorMessage = string.Format("当前系统wid为{0}相应公众号的配置不完整,AppId或者AppSecret未填写完全,请在[我的公众帐号]里补全信息！",
wid);
return(null);
}
//从数据库中获取Token
var tokenFromDb = _accessTokenRepository.GetAccessToken(appInfo.Id);
//如果不存在
if (tokenFromDb == null || tokenFromDb.IsExpired())
{
//设置已存的AccessToken过期
_accessTokenRepository.SetAccessTokenExpire(tokenFromDb);
//从微信重新获取AccessToken
var accessTokenResult = CommonApi.GetToken(appInfo.AppId, appInfo.AppSecret);
var newAccessToken = new AccessToken
{
Id = Guid.NewGuid(),
AppId = appInfo.Id,
SysDateTime = DateTime.Now,
Ticket = accessTokenResult.access_token,
Expires = accessTokenResult.expires_in
};
//缓存新获取到的AccessToken到数据库
_accessTokenRepository.Add(newAccessToken);
errorMessage = string.Empty;
return(newAccessToken);
}
errorMessage = string.Empty;
return(tokenFromDb);
}
catch (Exception exception)
{
errorMessage = exception.Message;
return(null);
}
}
}