c# - 无法使用 C# HttpClient 获取任何 cookie

Question

我正在尝试使用 C# 和 HttpClient 类在 Spotify 登录页面上获取 cookie。但是，当我知道正在设置 cookie 时，CookieContainer 始终为空。我没有发送任何 header ，但它仍然应该给我 cookie，因为当我使用 python(请求模块)发送没有任何 header 的 GET 请求时，我得到了 csrf token 。这是我的代码:

using System;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Collections;
using System.Web;

class Program
{
    static void Main()
    {
        Task t = new Task(MakeRequest);
        t.Start();
        Console.WriteLine("Getting cookies!");
        Console.ReadLine();
    }

    static async void MakeRequest()
    {
        CookieContainer cookies = new CookieContainer();
        HttpClientHandler handler = new HttpClientHandler();

        handler.CookieContainer = cookies;
        Uri uri = new Uri("https://accounts.spotify.com/en/login/?_locale=en-US&continue=https:%2F%2Fwww.spotify.com%2Fus%2Faccount%2Foverview%2F");
        HttpClient client = new HttpClient(handler);
        var response = await client.GetAsync(uri);
        string res = await response.Content.ReadAsStringAsync();
        Console.WriteLine(cookies.Count);
        foreach (var cookie in cookies.GetCookies(uri)) {
            Console.WriteLine(cookie.ToString());
        }
    }
}

这对我来说似乎很简单，但程序总是说有 0 个 cookie。有人知道这是怎么回事吗？

Answer 1

您需要使用 HttpClientHandler.UseCookies Property 启用 cookie

public bool UseCookies { get; set; }

Gets or sets a value that indicates whether the handler uses the CookieContainer property to store server cookies and uses these cookies when sending requests.

//...

CookieContainer cookies = new CookieContainer();
HttpClientHandler handler = new HttpClientHandler();
handler.CookieContainer = cookies;
handler.UseCookies = true; //<-- Enable the use of cookies.

//...