67 lines
2.9 KiB
C#
67 lines
2.9 KiB
C#
using System;
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using System.Net.Http;
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using System.Threading.Tasks;
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using System.IO;
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using System.Threading;
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using PluginManager.Others;
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namespace PluginManager.Online.Helpers
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{
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internal static class OnlineFunctions
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{
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/// <summary>
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/// Downloads a <see cref="Stream"/> and saves it to another <see cref="Stream"/>.
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/// </summary>
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/// <param name="client">The <see cref="HttpClient"/> that is used to download the file</param>
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/// <param name="url">The url to the file</param>
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/// <param name="destination">The <see cref="Stream"/> to save the downloaded data</param>
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/// <param name="progress">The <see cref="IProgress{T}"/> that is used to track the download progress</param>
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/// <param name="cancellation">The cancellation token</param>
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/// <returns></returns>
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internal static async Task DownloadFileAsync(this HttpClient client, string url, Stream destination,
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IProgress<float> progress = null, IProgress<long> downloadedBytes = null, CancellationToken cancellation = default)
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{
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using (var response = await client.GetAsync(url, HttpCompletionOption.ResponseHeadersRead))
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{
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var contentLength = response.Content.Headers.ContentLength;
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using (var download = await response.Content.ReadAsStreamAsync())
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{
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// Ignore progress reporting when no progress reporter was
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// passed or when the content length is unknown
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if (progress == null || !contentLength.HasValue)
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{
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await download.CopyToAsync(destination);
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return;
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}
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// Convert absolute progress (bytes downloaded) into relative progress (0% - 100%)
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var relativeProgress = new Progress<long>(totalBytes =>
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{
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progress.Report((float)totalBytes / contentLength.Value * 100);
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downloadedBytes.Report(totalBytes);
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});
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// Use extension method to report progress while downloading
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await download.CopyToOtherStreamAsync(destination, 81920, relativeProgress, cancellation);
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progress.Report(1);
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}
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}
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}
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/// <summary>
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/// Read contents of a file as string from specified URL
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/// </summary>
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/// <param name="url">The URL to read from</param>
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/// <param name="cancellation">The cancellation token</param>
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/// <returns></returns>
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internal static async Task<string> DownloadStringAsync(string url, CancellationToken cancellation = default)
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{
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using (var client = new HttpClient())
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{
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return await client.GetStringAsync(url);
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}
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}
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}
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}
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