public void Authenticate(IHttpRequest request)
{
ApiKey apiKey = ApiKey.ExtractFrom(request);
if (apiKey.IsMissing ||
!request.TryResolve <IKeyVerifier>().Verify(apiKey))
{
string unauthorized = string.Format("Unauthorized request. Please, include a valid '{0}'", ApiKey.ParameterName);
throw HttpError.Unauthorized(unauthorized);
}
}
public void Rate(IHttpRequest request, IHttpResponse response)
{
ApiKey apiKey = ApiKey.ExtractFrom(request);
if (!apiKey.IsMissing)
{
var resources = request.TryResolve <IResourceManager>();
ThrottlingConfiguration configuration = resources.Get(ThrottlingConfiguration.Key, ThrottlingConfiguration.Empty());
var repository = request.TryResolve <IRequestCountRepository>();
RequestCount count = repository.Get(apiKey);
addLimitHeader(response, configuration);
addRemainingHeader(response, configuration, count);
addResetHeader(response, configuration, count);
}
}
public void Throttle(IHttpRequest request, IHttpResponse response)
{
var resources = request.TryResolve <IResourceManager>();
ThrottlingConfiguration configuration = resources.Get(ThrottlingConfiguration.Key, ThrottlingConfiguration.Empty());
var key = ApiKey.ExtractFrom(request);
if (!key.IsMissing && configuration.ThrottlingEnabled)
{
var repository = request.TryResolve <IRequestCountRepository>();
RequestCount count = repository.Ensure(key, () => new RequestCount(configuration.Period));
if (count.IsLessThan(configuration.NumberOfRequests))
{
repository.Update(key, count.Increase());
}
else
{
response.AddHeader("Retry-After", configuration.FormattedSeconds);
throw new HttpError(429, configuration.ErrorMessage());
}
}
}
