当文件不在c#中的url中时从网站下载文件

Question

我目前正在开发一个应用程序，需要我能够使用那里的ID下载osubeatmap文件，我尝试将链接复制到下载，对我来说这就是 https://osu.ppy.sh/beatmapsets/1012634/download 然后只是向它发送一个网络请求并下载响应，但它并没有完全起作用，它生成了一个不是beatmap的200kb文件

我还发现了这个 GitHub osu！ API问题https://github.com/ppy/osu-api/issues/288说要添加cookie，但我不知道如何让它在c#中工作。

我尝试过的代码：

using System;
using System.IO;
using System.Net.Http;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        string downloadUrl = "https://osu.ppy.sh/beatmapsets/1012634/download";

        using (HttpClient client = new HttpClient())
        {
            HttpResponseMessage response = await client.GetAsync(downloadUrl);

            if (response.IsSuccessStatusCode)
            {
                // Read the response content as a byte array
                byte[] fileBytes = await response.Content.ReadAsByteArrayAsync();

                // Save the downloaded file
                string filePath = @"C:\Users\chead\Downloads\map.osz";
                File.WriteAllBytes(filePath, fileBytes);

                Console.WriteLine($"File downloaded successfully to: {filePath}");
            }
            else
            {
                Console.WriteLine($"Failed to download file. Status code: {response.StatusCode}");
            }

        }
        Console.WriteLine("That's it!");
        Console.ReadKey();
    }
}

我尝试使用osu！ API，但似乎没有任何端点可以下载beatmap

我还尝试了使用网络客户端下载文件 说要这样做，但没有成功

这是我尝试过的代码：

using System;
using System.IO;
using System.Net;
using System.Threading.Tasks;

class Program
{
    static void Main(string[] args)
    {
        WebClient wc = new WebClient();
        string strFile = Path.Combine(Directory.GetCurrentDirectory(), "downloaded_file.osz");

        wc.Credentials = new System.Net.NetworkCredential("me", "pw");
        wc.Headers.Add("User-Agent", "my user agent");
        wc.DownloadFile("https://osu.ppy.sh/beatmapsets/1012634/download", strFile);
        Console.WriteLine("That's it!");
        Console.ReadKey();
    }
}

我也尝试过这个（没用）：

using System.Net;

class Program
{
    static void Main(string[] args)
    {
        using (var client = new HttpClient())
        {
            using (var stream = client.GetStreamAsync("https://osu.ppy.sh/beatmapsets/1012634/download"))
            {
                using (var FileStream = new FileStream("map.osz", FileMode.OpenOrCreate))
                {
                    stream.Result.CopyTo(FileStream);
                    Console.WriteLine($"Code Returned 0, saved to map.osz in the dir");
                }
            }

        }
        Console.ReadKey();
    }

}

任何帮助将不胜感激。

Answer 1

尝试使用 CookieAwareWebClient（来自此答案：将 CookieContainer 与 WebClient 类一起使用）

static void Main(string[] args)
{
    var wc = new CookieAwareWebClient(); // <------ CHANGE HERE
    string strFile = Path.Combine(Directory.GetCurrentDirectory(), "downloaded_file.osz");

    wc.Credentials = new System.Net.NetworkCredential("me", "pw");
    wc.Headers.Add("User-Agent", "my user agent");
    wc.DownloadFile("https://osu.ppy.sh/beatmapsets/1012634/download", strFile);
    Console.WriteLine("That's it!");
}


public class CookieAwareWebClient : WebClient
{
    private readonly CookieContainer m_container = new CookieContainer();

    protected override WebRequest GetWebRequest(Uri address)
    {
        WebRequest request = base.GetWebRequest(address);
        HttpWebRequest webRequest = request as HttpWebRequest;
        if (webRequest != null)
        {
            webRequest.CookieContainer = m_container;
        }
        return request;
    }
}