64 lines
2.1 KiB
C#
64 lines
2.1 KiB
C#
namespace ASC.Data.Storage;
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public static class Extensions
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{
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private const int BufferSize = 2048;//NOTE: set to 2048 to fit in minimum tcp window
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public static async Task<Stream> IronReadStreamAsync(this IDataStore store, TempStream tempStream, string domain, string path, int tryCount)
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{
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var ms = tempStream.Create();
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await IronReadToStreamAsync(store, domain, path, tryCount, ms);
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ms.Seek(0, SeekOrigin.Begin);
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return ms;
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}
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public static Task IronReadToStreamAsync(this IDataStore store, string domain, string path, int tryCount, Stream readTo)
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{
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if (tryCount < 1)
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{
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throw new ArgumentOutOfRangeException(nameof(tryCount), "Must be greater or equal 1.");
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}
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if (!readTo.CanWrite)
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{
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throw new ArgumentException("stream cannot be written", nameof(readTo));
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}
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return InternalIronReadToStreamAsync(store, domain, path, tryCount, readTo);
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}
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private static async Task InternalIronReadToStreamAsync(this IDataStore store, string domain, string path, int tryCount, Stream readTo)
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{
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var tryCurrent = 0;
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var offset = 0;
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while (tryCurrent < tryCount)
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{
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try
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{
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tryCurrent++;
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using var stream = await store.GetReadStreamAsync(domain, path, offset);
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var buffer = new byte[BufferSize];
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int readed;
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while ((readed = await stream.ReadAsync(buffer, 0, BufferSize)) > 0)
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{
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await readTo.WriteAsync(buffer, 0, readed);
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offset += readed;
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}
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break;
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}
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catch (Exception ex)
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{
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if (tryCurrent >= tryCount)
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{
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throw new IOException("Can not read stream. Tries count: " + tryCurrent + ".", ex);
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}
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Thread.Sleep(tryCount * 50);
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}
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}
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}
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}
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