/// <summary>
        /// Gets the images from the specified url.
        /// </summary>
        /// <param name="client"></param>
        /// <param name="url"></param>
        /// <returns></returns>
        public static async Task <ImageResponse> GetPixivImagesAsync(IDownloaderClient client, Uri url)
        {
            var u = DownloaderClient.RemoveQuery(url).ToString().Replace("_d", "");

            if (u.IsImagePath())
            {
                return(ImageResponse.FromUrl(new Uri(u)));
            }
            if (!(HttpUtility.ParseQueryString(url.Query)["illust_id"] is string id))
            {
                return(ImageResponse.FromUrl(url));
            }
            var mangaQuery  = new Uri($"https://www.pixiv.net/member_illust.php?mode=manga&illust_id={id}");
            var mangaResult = await client.GetHtmlAsync(() => client.GenerateReq(mangaQuery)).CAF();

            if (mangaResult.IsSuccess)
            {
                //18+ filter
                if (mangaResult.Value.DocumentNode.Descendants("p").Any(x => x.HasClass("title") && x.InnerText.Contains("R-18")))
                {
                    return(ImageResponse.FromException(url, new InvalidOperationException("Locked behind R18 filter.")));
                }
                //Sign up menu
                if (mangaResult.Value.DocumentNode.Descendants("div").Any(x => x.HasClass("signup-form")))
                {
                    return(ImageResponse.FromException(url, new InvalidOperationException("Locked behind R18 filter or is private.")));
                }

                var div           = mangaResult.Value.DocumentNode.Descendants("div");
                var itemContainer = div.Where(x => x.GetAttributeValue("class", "") == "item-container");
                var images        = itemContainer.Select(x => x.Descendants("img").Single());
                var imageUrls     = images.Select(x => new Uri(FixPixivUrl(x.GetAttributeValue("data-src", ""))));
                return(ImageResponse.FromImages(imageUrls));
            }
            var mediumQuery  = new Uri($"https://www.pixiv.net/member_illust.php?mode=medium&illust_id={id}");
            var mediumResult = await client.GetHtmlAsync(() => client.GenerateReq(mediumQuery)).CAF();

            if (mediumResult.IsSuccess)
            {
                //18+ filter
                if (mediumResult.Value.DocumentNode.Descendants("p").Any(x => x.HasClass("title") && x.InnerText.Contains("R-18")))
                {
                    return(ImageResponse.FromException(url, new InvalidOperationException("Locked behind R18 filter.")));
                }

                var div          = mediumResult.Value.DocumentNode.Descendants("div");
                var imgContainer = div.Single(x => x.GetAttributeValue("class", "") == "img-container");
                var img          = imgContainer.Descendants("img").Single();
                var imageUrl     = new Uri(FixPixivUrl(img.GetAttributeValue("src", "")));
                return(ImageResponse.FromUrl(imageUrl));
            }
            return(ImageResponse.FromNotFound(url));
        }