public static void Enable(IPipelines pipelines, LeakyBucketRateLimiterConfiguration configuration)
{
if (pipelines == null)
{
throw new ArgumentNullException(nameof(pipelines));
}
if (configuration == null)
{
throw new ArgumentNullException(nameof(configuration));
}
pipelines.BeforeRequest.AddItemToStartOfPipeline(CheckRequestCount(configuration));
}
public static void Enable(INancyModule module, LeakyBucketRateLimiterConfiguration configuration)
{
if (module == null)
{
throw new ArgumentNullException(nameof(module));
}
if (configuration == null)
{
throw new ArgumentNullException(nameof(configuration));
}
module.Before.AddItemToStartOfPipeline(CheckRequestCount(configuration));
}
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);
});
}