Custom Rate Limit Incrementer

MPRateLimitConfiguration.cs

using System;
using System.Linq;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Options;

namespace AspNetCoreRateLimit.Demo
{
    public class MPRateLimitConfiguration : RateLimitConfiguration
    {
        public MPRateLimitConfiguration(
            IHttpContextAccessor httpContextAccessor,
            IOptions<IpRateLimitOptions> ipOptions,
            IOptions<ClientRateLimitOptions> clientOptions)
            : base(httpContextAccessor, ipOptions, clientOptions)
        {

        }

        public override Func<long> RateIncrementer => () =>
        {
            long value = 0;
            var httpContext = HttpContextAccessor.HttpContext;

            if (httpContext.Request.Headers.TryGetValue("X-UIPATH-Metadata", out var values))
            {
                // values.First() is actually a json if i remember correctly
                // so it first needs deserialization and then actual value extraction
                if (long.TryParse(values.First(), out value))
                {
                    return value;
                }
            }

            return value;
        };
    }
}

Startup.cs

services.AddSingleton<IRateLimitConfiguration, MPRateLimitConfiguration>();