public async Task ConcurrentLimiterLimitsConcurrency()
{
var limiter = new ConcurrentLimiter(3);
var nums = new[] { 1, 2, 3, 4 };
var stopwatch = Stopwatch.StartNew();
var results = await nums.Select(
limiter,
async x =>
{
var time = stopwatch.ElapsedMilliseconds;
await Task.Delay(500);
return(time);
});
stopwatch.Stop();
Assert.True(results[0].IsNear(0, 100));
Assert.True(results[1].IsNear(0, 100));
Assert.True(results[2].IsNear(0, 100));
Assert.True(results[3].IsNear(500, 100));
}
public HttpRequestRateLimiterMiddleware(RequestDelegate next, IOptions <HttpRequestRateLimiterOptions <TKey> > options, IConfiguration config, ILoggerFactory loggerFactory)
{
Next = next ?? throw new ArgumentNullException(nameof(next));
Config = config ?? throw new ArgumentNullException(nameof(config));
Options = options?.Value ?? throw new ArgumentNullException(nameof(options));
RateLimiter = new RateLimiter <TKey>(RateLimiterOptions);
ConcurrentLimiter = new ConcurrentLimiter <TKey>(Options.MaxConcurrentRequestsPerSrcSubnet);
}
public IpConnectionRateLimiter(string hiveName)
{
hiveName._NotEmptyCheck(nameof(hiveName));
this.HiveName = hiveName;
using var config = new HiveData <IpConnectionRateLimiterOptions>(Hive.SharedLocalConfigHive, $"NetworkSettings/IpConnectionRateLimiter/{hiveName}",
() => new IpConnectionRateLimiterOptions(),
policy: HiveSyncPolicy.None);
lock (config.DataLock)
{
this.Options = config.ManagedData;
}
this.RateLimiter = new RateLimiter <HashKeys.SingleIPAddress>(new RateLimiterOptions(this.Options.RateLimiter_Burst, this.Options.RateLimiter_LimitPerSecond, this.Options.RateLimiter_ExpiresMsec,
this.Options.RateLimiter_EnablePenalty ? RateLimiterMode.Penalty : RateLimiterMode.NoPenalty,
this.Options.RateLimiter_MaxEntries,
this.Options.RateLimiter_GcIntervalMsec));
this.ConcurrentLimiter = new ConcurrentLimiter <HashKeys.SingleIPAddress>(this.Options.ConcurrentLimiter_MaxConcurrentRequestsPerSrcSubnet);
if (this.Options.Common_ReportDebugLog)
{
this.RateLimiter.EventListener.RegisterCallback((a, b, c, d) =>
{
string?str = d as string;
if (str._IsFilled())
{
Dbg.WriteLine($"IpConnectionRateLimiter[{this.HiveName}]: {str}");
}
});
this.ConcurrentLimiter.EventListener.RegisterCallback((a, b, c, d) =>
{
string?str = d as string;
if (str._IsFilled())
{
Dbg.WriteLine($"IpConnectionRateLimiter[{this.HiveName}]: {str}");
}
});
}
}
