public async Task Invoke(HttpContext context)
{
var endpoint = context.GetEndpoint();
var throttleMetadata = endpoint?.Metadata.GetMetadata <IThrottleMetadata>();
if (throttleMetadata == null)
{
await _next.Invoke(context);
return;
}
var disableThrottle = endpoint?.Metadata.GetMetadata <IDisableThrottle>();
if (disableThrottle != null)
{
await _next.Invoke(context);
return;
}
var policy = await _throttlePolicyProvider.GetPolicyAsync(throttleMetadata.PolicyName);
if (policy == null)
{
context.Response.StatusCode = StatusCodes.Status500InternalServerError;
return;
}
if (policy.Resolver == null)
{
context.Response.StatusCode = StatusCodes.Status500InternalServerError;
return;
}
var scope = await policy.Resolver.ResolveAsync(context);
var isSafe = await CheckSafeScopes(context, policy, scope);
if (isSafe)
{
await _next.Invoke(context);
return;
}
IReadOnlyList <ThrottleRule> generalRules;
if (throttleMetadata is IThrottleRulesMetadata throttle)
{
// ThrottleRuleMetadata overrides the general rule
generalRules = throttle.GeneralRules;
}
else
{
generalRules = policy.GeneralRules;
}
IReadOnlyList <ThrottleRule> specificRules;
if (policy.SpecificRules.TryGetValue(scope, out var specificRulesList))
{
specificRules = specificRulesList;
}
else
{
specificRules = _emptyRules;
}
var rules = _throttlerService.GetRules(generalRules, specificRules);
(ThrottleRule rule, Counter counter, bool hasBeenSet)longestRule = (default, default, false);