从我的 React 应用程序调用我的 asp.net 核心 controller 并在尝试获取它时返回 null 时不会生成 Cookie

Question

This is my code for frontend which calls for my session

await fetch("https://localhost:5001/api/session", {
          method: "GET",
          credentials: "same-origin",
})

This is my code for the api when sets a session

[HttpGet]
public ActionResult<string> CallMe()
{
    HttpContext.Session.SetString("Who", "Doctor Who");
    return Ok();
}

This should set a cookie in my browser on call but nothing shows up there.Code when I try to get the cookie on my other controller

[HttpGet]
public ActionResult<string> CallMeToo()
{
    string a = HttpContext.Session.GetString("Who");
    return Ok();
}

This returns null after the set call I call this too.

Answer 1

Solved by adding AllowCredentials on services.AddCors to allow cross-origin cookies