Session Cookie never set in asp.net core

Question

I am trying to configure sessions for an asp.net core 2.0 website, but the session cookie is never set.

I call ..

app.UseSession();

...in Startup.Configure and ...

        services.AddDistributedMemoryCache();

        services.AddSession(options =>
        {
            options.IdleTimeout = TimeSpan.FromMinutes(10);
            options.Cookie.HttpOnly = false;
            options.Cookie.Name = "WS_AUTH_ID";
        });

... in the ConfigureServices method.

In the Controller I can acess ...

HttpContext.Session.Id;

... but the id is always different for every request.

Am I missing something?

Update: I should metion that I can set cookies "manually" and the browser will "receive" them.

HttpContext.Response.Cookies.Append("Test_cookie", "yo");

Answer 1

If you have the cookie policy turned ON the session cookiewon't be created until the user accepts the use of Cookies, this is to comply with the EU's GDPR.

You can remove the line app.UseCookiePolicy(); from you Startup and then it will work, otherwise your users will need to agree to the use of cookies before you can use the cookie for session control.