/// <summary>
/// 校验完整的限流规则
/// </summary>
/// <param name="rateLimitOptions">限流配置</param>
/// <returns></returns>
private bool CheckRateLimitResult(List <CzarClientRateLimitOptions> rateLimitOptions)
{
bool result = true;
if (rateLimitOptions != null && rateLimitOptions.Count > 0)
{//校验策略
foreach (var op in rateLimitOptions)
{
CzarClientRateLimitCounter counter = new CzarClientRateLimitCounter(DateTime.UtcNow, 1);
//分别对每个策略校验
var enablePrefix = CzarCacheRegion.CzarClientRateLimitCounterRegion;
var key = CzarOcelotHelper.ComputeCounterKey(enablePrefix, op.ClientId, op.Period, op.RateLimitPath);
var periodTimestamp = CzarOcelotHelper.ConvertToSecond(op.Period);
lock (_processLocker)
{
var rateLimitCounter = _clientRateLimitCounter.Get(key, enablePrefix);
if (rateLimitCounter.HasValue)
{//提取当前的计数情况
// 请求次数增长
var totalRequests = rateLimitCounter.Value.TotalRequests + 1;
// 深拷贝
counter = new CzarClientRateLimitCounter(rateLimitCounter.Value.Timestamp, totalRequests);
}
else
{//写入限流策略
_clientRateLimitCounter.Add(key, counter, TimeSpan.FromSeconds(periodTimestamp), enablePrefix);
}
}
if (counter.TotalRequests > op.Limit)
{//更新请求记录，并标记为失败
result = false;
}
if (counter.TotalRequests > 1 && counter.TotalRequests <= op.Limit)
{//更新缓存配置信息
//获取限流剩余时间
var cur = (int)(counter.Timestamp.AddSeconds(periodTimestamp) - DateTime.UtcNow).TotalSeconds;
_clientRateLimitCounter.Add(key, counter, TimeSpan.FromSeconds(cur), enablePrefix);
}
}
}
return(result);
}
/// <summary>
/// 校验当前的请求地址客户端是否有权限访问
/// </summary>
/// <param name="clientid">客户端ID</param>
/// <param name="path">请求地址</param>
/// <returns></returns>
public async Task <bool> CheckClientAuthenticationAsync(string clientid, string path)
{
var enablePrefix = CzarCacheRegion.AuthenticationRegion;
var key = CzarOcelotHelper.ComputeCounterKey(enablePrefix, clientid, "", path);
var cacheResult = _ocelotCache.Get(key, enablePrefix);
if (cacheResult != null)
{//提取缓存数据
return(cacheResult.Role);
}
else
{//重新获取认证信息
var result = await _clientAuthenticationRepository.ClientAuthenticationAsync(clientid, path);
//添加到缓存里
_ocelotCache.Add(key, new ClientRoleModel()
{
CacheTime = DateTime.Now, Role = result
}, TimeSpan.FromMinutes(_options.CzarCacheTime), enablePrefix);
return(result);
}
}
public async Task UpdateClientRuleCache(string clientid, string path)
{
var region = CzarCacheRegion.AuthenticationRegion;
var key = CzarOcelotHelper.ComputeCounterKey(region, clientid, "", path);
key = CzarOcelotHelper.GetKey(_options.RedisOcelotKeyPrefix, region, key);
var result = await _clientAuthenticationRepository.ClientAuthenticationAsync(clientid, path);
var data = new ClientRoleModel()
{
CacheTime = DateTime.Now, Role = result
};
if (_options.ClusterEnvironment)
{
RedisHelper.Set(key, data); //加入redis缓存
RedisHelper.Publish(key, data.ToJson()); //发布事件
}
else
{
_cache.Remove(key);
}
}