Genshin Impact - Retrieve Gacha API URL

Program.cs

// See https://aka.ms/new-console-template for more information

using System.Collections.Specialized;
using System.Net.Http.Headers;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;

string homeFolder = "/home/rekyuu";
string genshinPrefix = $"{homeFolder}/wineprefixes/genshin-impact";
string sourceDataPath =
    $"{genshinPrefix}/drive_c/Program Files/Genshin Impact/Genshin Impact game/GenshinImpact_Data/webCaches/Cache/Cache_Data/data_2";
string tmpDataPath = $"{Path.GetTempPath()}/genshin_data";

File.Copy(sourceDataPath, tmpDataPath, true);

string data = File.ReadAllText(tmpDataPath, Encoding.UTF8);
string[] dataSplit = data.Split("1/0/");
string[] results = dataSplit.Where(x => x.Contains("e20190909gacha-v2")).Reverse().ToArray();

HttpClient client = new();
client.DefaultRequestHeaders
    .Accept
    .Add(new MediaTypeWithQualityHeaderValue("application/json"));

string successfulApiUrl = "";

foreach (string result in results)
{
    Regex rx = new Regex("(https.+?game_biz=hk4e_global)");
    var match = rx.Match(result);
    
    if (!match.Success) continue;

    UriBuilder uri = new(match.Value);

    NameValueCollection uriParams = HttpUtility.ParseQueryString(uri.Query);
    uriParams.Set("lang", "en");
    uriParams.Set("gacha_type", "301");
    uriParams.Set("size", "5");
    uriParams.Add("lang", "en-us");

    uri.Path = "event/gacha_info/api/getGachaLog";
    uri.Host = "hk4e-api-os.hoyoverse.com";
    uri.Fragment = "";
    uri.Query = uriParams.ToString();

    string apiUrl = uri.Uri.AbsoluteUri;

    HttpResponseMessage response = await client.GetAsync(apiUrl);

    if (response.IsSuccessStatusCode)
    {
        successfulApiUrl = apiUrl;
        Console.WriteLine(successfulApiUrl);
        
        break;
    }
}

if (string.IsNullOrEmpty(successfulApiUrl))
{
    Console.WriteLine("Could not find a valid URL. Try checking your wish history.");
    Environment.Exit(1);
}

File.Delete(tmpDataPath);