private static Func <NancyContext, Response> CheckRequestCount(LeakyBucketRateLimiterConfiguration configuration)
{
return(context =>
{
var identifier = configuration.ClientIdentifierFunc(context);
var store = configuration.RequestStore;
var config = new LeakyBucketContainerConfiguration
{
RefreshRate = configuration.RefreshRate,
Limit = configuration.MaxNumberOfRequests
};
var container = new LeakyBucketContainer(store, config);
return container.RequestsRemaining(identifier) > 0
? null
: new Response().WithStatusCode(HttpStatusCode.TooManyRequests);
});
}
public LeakyBucketContainer(
IRequestStore requestStore,
LeakyBucketContainerConfiguration configuration,
ISystemClock systemClock = null)
{
if (requestStore == null)
{
throw new ArgumentNullException(nameof(requestStore));
}
if (configuration == null)
{
throw new ArgumentNullException(nameof(configuration));
}
_requestStore = requestStore;
_configuration = configuration;
_systemClock = systemClock ?? new SystemClock();
}