C#•17mo ago

❔ Injecting rate limiter instance into other services in ASP.NET 7

Hey, does anyone know if it's possible to inject the rate limiter instance into other services in my WebApplication. I have registered my TokenBucketLimiter in my program.cs file and would like to access the instance in another service so i could see how many tokens are left and replenish them.

builder.Services.AddRateLimiter(options => options
    .AddTokenBucketLimiter(policyName: "MyTokenBucketLimiter", options =>
    {
        options.TokensPerPeriod = 10;
        options.ReplenishmentPeriod = TimeSpan.FromSeconds(10);
        options.QueueProcessingOrder = QueueProcessingOrder.OldestFirst;
        options.QueueLimit = 10;
    })
    .OnRejected = async (context, token) =>
    {
        if (context.Lease.TryGetMetadata(MetadataName.RetryAfter, out var retryAfter))
        {
            context.HttpContext.Response.Headers.Add(HeaderNames.RetryAfter, ((int) retryAfter.TotalSeconds)
                .ToString(NumberFormatInfo.InvariantInfo));
            await context.HttpContext.Response.WriteAsync("Too many requests. Please try later again... ", token);
        }
    }
);

builder.Services.AddRateLimiter(options => options
    .AddTokenBucketLimiter(policyName: "MyTokenBucketLimiter", options =>
    {
        options.TokensPerPeriod = 10;
        options.ReplenishmentPeriod = TimeSpan.FromSeconds(10);
        options.QueueProcessingOrder = QueueProcessingOrder.OldestFirst;
        options.QueueLimit = 10;
    })
    .OnRejected = async (context, token) =>
    {
        if (context.Lease.TryGetMetadata(MetadataName.RetryAfter, out var retryAfter))
        {
            context.HttpContext.Response.Headers.Add(HeaderNames.RetryAfter, ((int) retryAfter.TotalSeconds)
                .ToString(NumberFormatInfo.InvariantInfo));
            await context.HttpContext.Response.WriteAsync("Too many requests. Please try later again... ", token);
        }
    }
);

1 Reply

Accord•17mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Injecting rate limiter instance into other services in ASP.NET 7