Kavita/Kavita.Server/Logging/LogEnricher.cs

using System.Linq;
using Microsoft.AspNetCore.Http;
using Serilog;

namespace Kavita.Server.Logging;

public static class LogEnricher
{
    /// <summary>
    /// Enriches the HTTP request log with additional data via the Diagnostic Context
    /// </summary>
    /// <param name="diagnosticContext">The Serilog diagnostic context</param>
    /// <param name="httpContext">The current HTTP Context</param>
    public static void EnrichFromRequest(IDiagnosticContext diagnosticContext, HttpContext httpContext)
    {
        diagnosticContext.Set("ClientIP", httpContext.Connection.RemoteIpAddress?.ToString());
        diagnosticContext.Set("UserAgent", httpContext.Request.Headers.UserAgent.FirstOrDefault());
        diagnosticContext.Set("Path", httpContext.Request.Path);
    }
}