booking-microservices/building-blocks/Logging/LogEnrichHelper.cs

using System.Security.Claims;
using Microsoft.AspNetCore.Http;
using Serilog;

namespace BuildingBlocks.Logging;

public static class LogEnrichHelper
{
    //ref: https://andrewlock.net/using-serilog-aspnetcore-in-asp-net-core-3-logging-the-selected-endpoint-name-with-serilog/
    public static void EnrichFromRequest(IDiagnosticContext diagnosticContext, HttpContext httpContext)
    {
        var request = httpContext.Request;

        // Set all the common properties available for every request
        diagnosticContext.Set("Host", request.Host);
        diagnosticContext.Set("Protocol", request.Protocol);
        diagnosticContext.Set("Scheme", request.Scheme);

        // Only set it if available. You're not sending sensitive data in a querystring right?!
        if (request.QueryString.HasValue)
        {
            diagnosticContext.Set("QueryString", request.QueryString.Value);
        }

        // Set the content-type of the Response at this point
        diagnosticContext.Set("ContentType", httpContext.Response.ContentType);

        // Retrieve the IEndpointFeature selected for the request
        var endpoint = httpContext.GetEndpoint();
        if (endpoint is object) // endpoint != null
        {
            diagnosticContext.Set("EndpointName", endpoint.DisplayName);
        }

        diagnosticContext.Set("ClientIP", httpContext.Connection.RemoteIpAddress);

        diagnosticContext.Set("UserId", request.HttpContext.User.FindFirstValue(ClaimTypes.NameIdentifier));
    }
}