87 lines
3.3 KiB
C#
87 lines
3.3 KiB
C#
using System;
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using System.IO;
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using System.Threading;
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using System.Threading.Tasks;
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namespace EmbedIO.Internal
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{
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// Wraps a response's output stream, buffering all data
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// in a MemoryStream.
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// When disposed, sets the response's ContentLength and copies all data
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// to the output stream.
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internal class BufferingResponseStream : Stream
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{
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private readonly IHttpResponse _response;
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private readonly MemoryStream _buffer;
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public BufferingResponseStream(IHttpResponse response)
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{
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_response = response;
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_buffer = new MemoryStream();
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}
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public override bool CanRead => false;
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public override bool CanSeek => false;
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public override bool CanWrite => true;
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public override long Length => _buffer.Length;
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public override long Position
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{
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get => _buffer.Position;
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set => throw SeekingNotSupported();
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}
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public override void Flush() => _buffer.Flush();
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public override Task FlushAsync(CancellationToken cancellationToken) => _buffer.FlushAsync(cancellationToken);
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public override int Read(byte[] buffer, int offset, int count) => throw ReadingNotSupported();
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public override int ReadByte() => throw ReadingNotSupported();
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public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
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=> throw ReadingNotSupported();
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public override int EndRead(IAsyncResult asyncResult) => throw ReadingNotSupported();
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public override Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken) => throw ReadingNotSupported();
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public override Task CopyToAsync(Stream destination, int bufferSize, CancellationToken cancellationToken)
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=> throw ReadingNotSupported();
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public override long Seek(long offset, SeekOrigin origin) => throw SeekingNotSupported();
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public override void SetLength(long value) => throw SeekingNotSupported();
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public override void Write(byte[] buffer, int offset, int count) => _buffer.Write(buffer, offset, count);
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public override void WriteByte(byte value) => _buffer.WriteByte(value);
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public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback callback, object state)
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=> _buffer.BeginWrite(buffer, offset, count, callback, state);
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public override void EndWrite(IAsyncResult asyncResult) => _buffer.EndWrite(asyncResult);
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public override Task WriteAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
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=> _buffer.WriteAsync(buffer, offset, count, cancellationToken);
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protected override void Dispose(bool disposing)
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{
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_response.ContentLength64 = _buffer.Length;
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_buffer.Position = 0;
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_buffer.CopyTo(_response.OutputStream);
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if (disposing)
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{
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_buffer.Dispose();
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}
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}
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private static Exception ReadingNotSupported() => new NotSupportedException("This stream does not support reading.");
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private static Exception SeekingNotSupported() => new NotSupportedException("This stream does not support seeking.");
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}
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} |