Factorio Forums

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using System.Text.RegularExpressions;

var client = new HttpClient();

var html = await client.GetStringAsync("https://mods.factorio.com/");

var matches = Regex.Matches(html, @"""(https://assets-mod\.factorio\.com/[^\""]+)\""");

foreach (Match match in matches)
{
    var url = match.Groups[1].Value;
    Console.WriteLine($"Downloading thumb: {url}");

    var fileName = Path.GetFileName(url);


    var stream = await client.GetStreamAsync(url);

    using var fs = File.OpenWrite(fileName);

    await stream.CopyToAsync(fs);
}

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// "BitmapSource" is WPF's class
// "ModPageShortInfo" is class i use for deserialize mods 'short' info request

private const string AssetsUrl = "https://assets-mod.factorio.com";

public async Task<BitmapSource?> DownloadThumbnail(ModPageShortInfo modPage, CancellationToken cancellationToken = default)
{
    if (string.IsNullOrEmpty(modPage.Thumbnail))
	return null;
	
    try
    {
        await ThumbnailDownloadSemaphore.WaitAsync(cancellationToken);
        string thumbnailUrl = AssetsUrl + modPage.Thumbnail; // <--- CORRECT URL! CHECKED MANY TIMES!
        Debug.WriteLine("Requesting thumbnail : " + thumbnailUrl);

        using (HttpResponseMessage response = await httpClient.GetAsync(thumbnailUrl)) // This is where i getting an exception
        {
            response.EnsureSuccessStatusCode();
            using (Stream contentStream = await response.Content.ReadAsStreamAsync())
            {
                BitmapImage bitmapImage = new BitmapImage();
                
                bitmapImage.BeginInit();
                bitmapImage.StreamSource = new MemoryStream();
                contentStream.CopyTo(bitmapImage.StreamSource);
                bitmapImage.EndInit();

                modPage.DownloadedThumbnail = bitmapImage;
            }
        }
    }
    catch (Exception ex)
    {
        Debug.WriteLine("Failed to load the image :", ex.Message);
    }

    ThumbnailDownloadSemaphore.Release();
    return modPage.DownloadedThumbnail;
}

Code: Select all

System.Net.Http.HttpRequestException: "This host is unknown. (assets-mod.factorio.com:443)"