无法使用 C# HttpClient 获取任何 cookie

Question

我正在尝试使用 C# 和 HttpClient class 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 headers，但它仍然应该给我 cookie，因为当我发送一个没有任何 headers 和 python（请求模块）的 GET 请求时，我得到了csrf 令牌。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。有人知道怎么回事吗？

Answer 1

我尝试使用 Console.WriteLine(response.Headers) 和带有 csrf 令牌的 Set-Cookie header 将响应 header 写入控制台打印到控制台。因此，HttpClient 似乎没有将此 header 中的 cookie 计为实际 cookie，因此不会将这些 cookie 添加到 CookieContainer。

Answer 2

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.

//...

无法使用 C# HttpClient 获取任何 cookie

Can't get any cookies with C# HttpClient

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cookies

spotify

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