rate limit in web api

Question

Is there any way to implement rate limiting of web apis in .Net framework 4.x?

There seems to be packages in latest .net versions as well as .net core. However looking for one for the .net framework

Answer 1

Hi @mp2022ms2,

I think the WebApiThrottle library should meet your needs.

https://github.com/stefanprodan/WebApiThrottle

ASP.NET Web API Throttling handler, OWIN middleware and filter are designed to control the rate of requests that clients can make to a Web API based on IP address, client API key and request route. WebApiThrottle package is available on NuGet at nuget.org/packages/WebApiThrottle.

config.MessageHandlers.Add(new ThrottlingHandler()
{
    // Generic rate limit applied to ALL APIs
    Policy = new ThrottlePolicy(perSecond: 1, perMinute: 20, perHour: 200)
    {
        IpThrottling = true,
        ClientThrottling = true,
        EndpointThrottling = true,
        EndpointRules = new Dictionary<string, RateLimits>
        { 
             //Fine tune throttling per specific API here
            { "api/search", new RateLimits { PerSecond = 10, PerMinute = 100, PerHour = 1000 } }
        }
    },
    Repository = new CacheRepository()
});

Best regards,
Lan Huang

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