Sharing value from custom middleware to anywhere

Question

I'm trying to pass the client IP address from the middleware to anywhere in the project.

I have made three attempts (session, cookie, items), but none of them is working.

I get the value using custom middleware as follows:

    public Task Invoke(HttpContext httpContext)
    {
        var httpConnectionFeature = httpContext.Features.Get<IHttpConnectionFeature>();
        var remoteIpAddress = httpConnectionFeature?.RemoteIpAddress;
        //var remoteIpAddress = httpContext.Connection.RemoteIpAddress;

        if (remoteIpAddress.ToString() != "::1")
        {
            var cookieOptions = new CookieOptions
            {
                Secure = true,
                HttpOnly = true,
                SameSite = SameSiteMode.None,
                Expires = DateTime.Now.AddMinutes(5),
                IsEssential = true
            };

            httpContext.Response.Cookies.Append("anonymousIP", remoteIpAddress.ToString(), cookieOptions);
            httpContext.Session.SetString("anonymousIP", remoteIpAddress.ToString());
            httpContext.Items.Add("anonymousIP", remoteIpAddress.ToString());
        }

        return _next(httpContext);
    }

but I can't receive it!

        var ctxt = Context.GetHttpContext();
        var x = ctxt.Session.GetString("anonymousIP");
        var y = ctxt.Items["anonymousIP"];
        var z = ctxt.Request.Cookies["anonymousIP"];

is there anything wrong? is it possible to share a value from the middleware to anywhere?

Answer 1

for a similar requirement, I created a class as below

public class CurrentUserService : ICurrentUserService
{
    private readonly IHttpContextAccessor _httpContextAccessor;
    public CurrentUserService(IHttpContextAccessor httpContextAccessor)
    {
        _httpContextAccessor = httpContextAccessor;
    }
    public string MyVariable
    {
        get
        { 
            // get data as you need, e.g. from header or request object.
            return _httpContextAccessor.HttpContext.Request.Headers["MyVariable"].ToString();
        }
    }
}

then using Dependency Injection - inject "ICurrentUserService" anywhere you need.