hypersapien

RateLimiter.cs

//Startup.cs
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    app.UseIpRateLimiting();
    app.UseClientRateLimiting();

    // the rest
}

public void ConfigureServices(IServiceCollection services)
{
    // your other configs here
    ...
	
    // needed to load configuration from appsettings.json
    services.AddOptions();

    // needed to store rate limit counters and ip rules
    services.AddMemoryCache();

    //load general configuration from appsettings.json
    services.Configure<IpRateLimitOptions>(Configuration.GetSection("IpRateLimiting"));

    //load ip rules from appsettings.json
    services.Configure<IpRateLimitPolicies>(Configuration.GetSection("IpRateLimitPolicies"));


    // inject counter and rules stores

    // inject counter and rules stores
    services.AddSingleton<IIpPolicyStore, MemoryCacheIpPolicyStore>();
    services.AddSingleton<IClientPolicyStore, MemoryCacheClientPolicyStore>();
    services.AddSingleton<IRateLimitCounterStore, MemoryCacheRateLimitCounterStore>();
    services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
    services.AddSingleton<IRateLimitConfiguration, RateLimitConfiguration>();
}


//Program.cs
public static async Task Main(string[] args)
{
    var webHost = CreateHostBuilder(args).Build();

    using (var scope = webHost.Services.CreateScope())
    {
        // get the ClientPolicyStore instance
        var clientPolicyStore = scope.ServiceProvider.GetRequiredService<IClientPolicyStore>();

        // seed client data from appsettings
        await clientPolicyStore.SeedAsync();
    }

    await webHost.RunAsync();
}

//appsettings.json
	...
    "IpRateLimiting": {
        "EnableEndpointRateLimiting": false,
        "StackBlockedRequests": false,
        "HttpStatusCode": 429,
        "IpWhitelist": [ ],
        "EndpointWhitelist": [ ],
        "ClientWhitelist": [ ],
        "GeneralRules": [
            {
                "Endpoint": "*",
                "Period": "1s",
                "Limit": 5
            },
            {
                "Endpoint": "*",
                "Period": "15m",
                "Limit": 10
            },
            {
                "Endpoint": "*",
                "Period": "12h",
                "Limit": 15
            },
            {
                "Endpoint": "*",
                "Period": "7d",
                "Limit": 20
            }
        ]
    }