97 lines
3.4 KiB
C#
97 lines
3.4 KiB
C#
using System.Buffers;
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using System.Net.Http;
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using Млаумчерб.Клиент.видимое;
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using Млаумчерб.Клиент.классы;
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namespace Млаумчерб.Клиент.сеть;
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public static class Сеть
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{
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public static int ParallelDownloadsN = 32;
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public static HttpClient http = new();
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public static async Task DownloadFileHTTP(string url, IOPath outPath, CancellationToken ct = default,
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Action<ArraySegment<byte>>? transformFunc = null)
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{
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await using var src = await http.GetStreamAsync(url, ct);
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await using var dst = File.OpenWrite(outPath);
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await src.CopyTransformAsync(dst, transformFunc, ct).ConfigureAwait(false);
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}
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public static async Task CopyTransformAsync(this Stream src, Stream dst,
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Action<ArraySegment<byte>>? transformFunc = null, CancellationToken ct = default)
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{
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// default dotnet runtime buffer size
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int bufferSize = 81920;
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byte[] readBuffer = ArrayPool<byte>.Shared.Rent(bufferSize);
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byte[] writeBuffer = ArrayPool<byte>.Shared.Rent(bufferSize);
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try
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{
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var readTask = src.ReadAsync(readBuffer, 0, bufferSize, ct).ConfigureAwait(false);
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while (true)
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{
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int readCount = await readTask;
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if (readCount == 0)
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break;
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(readBuffer, writeBuffer) = (writeBuffer, readBuffer);
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readTask = src.ReadAsync(readBuffer, 0, bufferSize, ct).ConfigureAwait(false);
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transformFunc?.Invoke(new ArraySegment<byte>(writeBuffer, 0, readCount));
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dst.Write(writeBuffer, 0, readCount);
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}
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}
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catch (OperationCanceledException)
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{
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}
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finally
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{
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ArrayPool<byte>.Shared.Return(readBuffer);
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ArrayPool<byte>.Shared.Return(writeBuffer);
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}
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}
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private static readonly string[] VERSION_MANIFEST_URLS =
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{
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"https://piston-meta.mojang.com/mc/game/version_manifest_v2.json"
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};
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private static async Task<List<RemoteVersionDescriptorProps>> GetRemoteVersionDescriptorsAsync()
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{
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List<RemoteVersionDescriptorProps> descriptors = new();
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foreach (var url in VERSION_MANIFEST_URLS)
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{
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try
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{
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var manifestText = await http.GetStringAsync(url);
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var catalog = JsonConvert.DeserializeObject<VersionCatalog>(manifestText);
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if (catalog != null)
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descriptors.AddRange(catalog.versions);
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}
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catch (Exception ex)
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{
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Приложение.Логгер.LogWarn(nameof(Сеть), ex);
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}
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}
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return descriptors;
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}
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private static List<GameVersionProps>? _versionPropsList;
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/// <returns>empty list if couldn't find any remote versions</returns>
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public static async Task<IReadOnlyList<GameVersionProps>> GetDownloadableVersions()
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{
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if (_versionPropsList == null)
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{
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_versionPropsList = new();
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var rvdlist = await GetRemoteVersionDescriptorsAsync();
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foreach (var r in rvdlist)
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{
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if (r.type == "release")
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_versionPropsList.Add(new GameVersionProps(r.id, r.url));
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}
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}
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return _versionPropsList;
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}
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} |