Переделан способ авторизации по qr

YandexMusic.API/Requests/Account/YGetAuthCookiesBuilder.cs

@@ -1,4 +1,5 @@
 using System.Net;
+using System.Net.Http.Headers;
 using YandexMusic.API.Models.Account;
 using YandexMusic.API.Requests.Common;
 
@@ -8,7 +9,47 @@ internal class YGetAuthCookiesBuilder : YAuthRequestBuilder<YAccessToken?, objec
 {
     public YGetAuthCookiesBuilder(YandexMusicApi api) : base(api) { }
     protected override string Method => WebRequestMethods.Http.Post;
+    protected override string BaseUrl => YConstants.Endpoints.MobilePassportUrl;
     protected override string PathTemplate => "1/bundle/oauth/token_by_sessionid";
     protected override HttpContent? GetContent(object _)
         => new FormUrlEncodedContent(new Dictionary<string, string> { { "client_id", YConstants.XClientId }, { "client_secret", YConstants.XClientSecret } });
+    protected override void SetCustomHeaders(HttpRequestHeaders headers)
+    {
+        base.SetCustomHeaders(headers);
+        headers.Add("ya-client-host", "passport.yandex.ru");
+
+        var cookieString = GetCookieString();
+        if (!string.IsNullOrEmpty(cookieString))
+            headers.Add("Ya-Client-Cookie", cookieString);
+    }
+    private string GetCookieString()
+    {
+        var container = Storage.CookieContainer;
+        if (container == null) return string.Empty;
+
+        var uris = new[]
+        {
+            new Uri("https://yandex.ru"),
+            new Uri("https://passport.yandex.ru"),
+            new Uri("https://mobileproxy.passport.yandex.net")
+        };
+
+        var cookies = new List<string>();
+        foreach (var uri in uris)
+        {
+            var cookieCollection = container.GetCookies(uri);
+            foreach (Cookie cookie in cookieCollection)
+            {
+                cookies.Add($"{cookie.Name}={cookie.Value}");
+            }
+        }
+
+        var distinct = cookies
+            .Select(c => c.Split('=')[0])
+            .Distinct()
+            .Select(name => cookies.First(c => c.StartsWith(name + "=")))
+            .ToList();
+
+        return string.Join("; ", distinct);
+    }
 }