/// <summary>
/// 获取AccessToken
/// </summary>
/// <param name="Now">当前日期时间</param>
/// <param name="AppId">AppId为空时默认取配置文件appSettings节点key=WeChatAppId</param>
/// <param name="AppSecret">AppSecret为空时默认取配置文件appSettings节点key=WeChatAppSecret</param>
/// <param name="GetAccessTokenFromStorage">委托客户端从自定义存储库(接入者的DB、Cache、仓储源)获取AccessToken</param>
/// <param name="UpdateAccessTokenToStorage">委托客户端将AccessToken插入或更新到自定义存储库(接入者的DB、Cache、仓储源)</param>
/// <returns></returns>
public static AccessTokenCacheModel GetAccessToken(DateTime Now, string AppId, string AppSecret, GetAccessTokenFromStorage GetAccessTokenFromStorage = null, UpdateAccessTokenToStorage UpdateAccessTokenToStorage = null)
{
AppId = string.IsNullOrWhiteSpace(AppId) ? Privacy.AppId : AppId;
AppSecret = string.IsNullOrWhiteSpace(AppSecret) ? Privacy.AppSecret : AppSecret;
var tokenModel = GetAccessTokenFromStorage?.Invoke(Now, AppId);
if (CheckAccessToken(Now, tokenModel))
{
return(tokenModel);
}
tokenModel = GetAccessTokenFromCache(AppId);
if (CheckAccessToken(Now, tokenModel))
{
return(tokenModel);
}
var token = GetAccessTokenFromWeChat(Now, AppId, AppSecret);
tokenModel = new AccessTokenCacheModel(token.expires_in);
tokenModel.access_token = token.access_token;
tokenModel.expires_in = token.expires_in;
tokenModel.appid = AppId;
UpdateAccessTokenToCache(tokenModel);
UpdateAccessTokenToStorage?.Invoke(Now, tokenModel);
return(tokenModel);
}
private void RefreshCacheForToken(string token)
{
using (var context = LuckIndiaDBContext.GetContext())
{
var accessToken = context.AccessTokens
.Include(x => x.User)
// .Include(x => x.Application)
.FirstOrDefault(x => x.Token == token);
if (accessToken == null ||
!ExpirableValidator.IsActive(accessToken.StartDate, accessToken.EndDate))
{
throw new InvalidAccessTokenException();
}
var accessTokenCache = new AccessTokenCacheModel
{
AccessToken = accessToken,
ApplicationId = accessToken.ApplicationId,
UserId = accessToken.UserId
};
_cache.TryAdd(token, accessTokenCache);
}
}
private static bool UpdateAccessTokenToCache(AccessTokenCacheModel Token)
{
if (null != Token)
{
CacheHelper.SetCache(key(Token.appid), Token, Token.expires_in / 60);
return(true);
}
return(false);
}
/// <summary>
/// 检查AccessToken是否有效
/// </summary>
/// <param name="Now">当前日期时间</param>
/// <param name="Token">AccessTokenCacheModel</param>
/// <returns></returns>
public static bool CheckAccessToken(DateTime Now, AccessTokenCacheModel Token)
{
if (null == Token)
{
return(false);
}
if (string.IsNullOrWhiteSpace(Token.access_token) || Token.expires_in < 1 || string.IsNullOrWhiteSpace(Token.expires_time))
{
return(false);
}
return(DateTime.Compare(Now.AddMinutes(5), DateTime.SpecifyKind(DateTime.Parse(Token.expires_time), Now.Kind)) < 0);
}
/// <summary>
/// 用户自定义获取AccessToken
/// </summary>
/// <returns></returns>
public static AccessTokenCacheModel GetAccessToken()
{
AccessToken.GetAccessTokenFromStorage get = delegate(DateTime Now, string AppId)
{
/* 根据AppId从自定义存储库(接入者的DB、Cache、仓储源)获取AccessToken
* return GetAccessTokenByCache(AppId);
* return GetAccessTokenByRedis(AppId);
* return GetAccessTokenByMemcache(AppId);
* return GetAccessTokenByMongodb(AppId);
* return GetAccessTokenByDB(AppId);
* ……
*/
/***** 示例·开始 *****/
AccessTokenCacheModel AccessToken = null;
/* 先从自己系统的快速获取已存在的票据（Cache、Redis，Memcache等）*/
object TokenFromCache = CacheHelper.GetCache("WeChatAccessToken_" + AppId);
AccessToken = null != TokenFromCache ? (AccessTokenCacheModel)TokenFromCache : null;
if (WeChatHelper4Net.AccessToken.CheckAccessToken(Now, AccessToken))
{
return(AccessToken);
}
/* 如果快速数据没有，再从自己系统的稳定数据库获取已存在的票据（MySQL，SQLServer，Oracle等）*/
//var TokenFromDB = BLLRepository.wechatManageBLL.GetTokenOrTicket(AppId, "AccessToken");
//if(null != TokenFromDB)
//{
// AccessToken = new AccessTokenCacheModel()
// {
// appid = TokenFromDB.appid,
// access_token = TokenFromDB.access_token,
// expires_in = TokenFromDB.expires_in,
// expires_time = TokenFromDB.expires_time,
// errcode = TokenFromDB.errcode,
// errmsg = TokenFromDB.errmsg
// };
// if(WeChatHelper4Net.AccessToken.CheckAccessToken(Now, AccessToken))
// {
// CacheHelper.SetCache("WeChatAccessToken_" + AccessToken.appid, AccessToken, AccessToken.expires_in / 60);
// return AccessToken;
// }
//}
/***** 示例·结束 *****/
return(null);
};
AccessToken.UpdateAccessTokenToStorage update = delegate(DateTime now, AccessTokenCacheModel Token)
{
bool result = false;
/* 根据Token.appid将AccessToken插入或更新到自定义存储库(接入者的DB、Cache、仓储源)
* result = UpdateAccessTokenToCache(Token.appid, Token);
* result = UpdateAccessTokenToRedis(Token.appid, Token);
* result = UpdateAccessTokenToMemcache(Token.appid, Token);
* result = UpdateAccessTokenToMongodb(Token.appid, Token);
* result = UpdateAccessTokenToDB(Token.appid, Token);
* ……
*/
/***** 示例·开始 *****/
if (null != Token && !string.IsNullOrWhiteSpace(Token.appid) && Token.expires_in > 60)
{
/* 先将票据存到自己系统的快速获取已存在的票据（Cache、Redis，Memcache等）*/
CacheHelper.SetCache("WeChatAccessToken_" + Token.appid, Token, Token.expires_in / 60);
//var entity = new TbWeChatTokenOrTicketModel()
//{
// appid = Token.appid,
// access_token = Token.access_token,
// expires_in = Token.expires_in,
// expires_time = Token.expires_time,
// errcode = Token.errcode,
// errmsg = Token.errmsg,
// type = "AccessToken",
// UpdateTime = DateTime.Now
//};
///* 为了避免快速数据丢失，再将票据存到自己系统的稳定数据库获取已存在的票据（MySQL，SQLServer，Oracle等）*/
//result = BLLRepository.wechatManageBLL.UpdateTokenOrTicket(entity);
}
/***** 示例·结束 *****/
return(result);
};
string appId = ConfigurationManager.AppSettings["WeChatAppId"].ToString(); //AppId为空时默认取配置文件appSettings节点key=WeChatAppId
string appSecret = ConfigurationManager.AppSettings["WeChatAppSecret"].ToString(); //AppSecret为空时默认取配置文件appSettings节点key=WeChatAppSecret
var token = AccessToken.GetAccessToken(DateTime.Now, appId, appSecret, get, update);
if (null != token)
{
return(token);
}
else
{
return(default(AccessTokenCacheModel));
}
}
