LenovoLegionToolkit

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using System;
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using System.IO;
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using System.Net.Http;
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using System.Threading;
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using System.Threading.Tasks;
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namespace LenovoLegionToolkit.Lib.Extensions;
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public static class HttpClientExtensions
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{
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    public static async Task DownloadAsync(this HttpClient client, string requestUri, Stream destination, IProgress<float>? progress = null, CancellationToken cancellationToken = default)
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    {
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        using var response = await client.GetAsync(requestUri, HttpCompletionOption.ResponseHeadersRead, cancellationToken).ConfigureAwait(false);
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        var contentLength = response.Content.Headers.ContentLength;
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        await using var download = await response.Content.ReadAsStreamAsync(cancellationToken).ConfigureAwait(false);
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        if (progress is null || !contentLength.HasValue)
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        {
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            await download.CopyToAsync(destination, cancellationToken).ConfigureAwait(false);
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            return;
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        }
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        progress.Report(0);
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        var relativeProgress = new Progress<long>(totalBytes => progress.Report((float)totalBytes / contentLength.Value));
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        await download.CopyToAsync(destination, 81920, relativeProgress, cancellationToken).ConfigureAwait(false);
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        progress.Report(1);
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    }
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}
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