Daniel Slocum

[daniel-slocum]

Adding and Using Rate Limiter Middleware

You can add the rate limiter and configure the rules through the rate limiter options.

// Add services to the container
builder.Services.AddRateLimiter(options =>
{
    // Configure rate limiter rules
    options.Rules.Add("/api/resource", new List<IRateLimitRule>
    {
        new RequestPerTimeSpanRule(5, TimeSpan.FromMinutes(1)), // Max 5 requests per minute
        new TimeSpanSinceLastRequestRule(TimeSpan.FromSeconds(10)) // At least 10 seconds between requests
    });
});

Once added, you can include the middleware in the request pipeline.

app.UseRateLimiter();

Rule Registration

Rules are tied to an endpoint, for example /api/resource, with support for multiple rules. You can include as many endpoints as desired. If a rule is not included, it is considered open and the request will be allowed. Current rule types supported are:

• Maximum number of requests for X time span
• Minimum of X time span between requests

The service is designed to run any new rules that are created and registered.