| | | 1 | | // Licensed to the .NET Foundation under one or more agreements. |
| | | 2 | | // The .NET Foundation licenses this file to you under the MIT license. |
| | | 3 | | |
| | | 4 | | using System.IO; |
| | | 5 | | using System.Threading; |
| | | 6 | | using System.Threading.Tasks; |
| | | 7 | | |
| | | 8 | | namespace System.Net.Http |
| | | 9 | | { |
| | | 10 | | internal sealed class EmptyReadStream : HttpBaseStream |
| | | 11 | | { |
| | 0 | 12 | | internal static EmptyReadStream Instance { get; } = new EmptyReadStream(); |
| | | 13 | | |
| | 0 | 14 | | private EmptyReadStream() { } |
| | | 15 | | |
| | 0 | 16 | | public override bool CanRead => true; |
| | 0 | 17 | | public override bool CanWrite => false; |
| | | 18 | | |
| | 0 | 19 | | protected override void Dispose(bool disposing) { /* nop */ } |
| | 0 | 20 | | public override void Close() { /* nop */ } |
| | | 21 | | |
| | 0 | 22 | | public override int Read(Span<byte> buffer) => 0; |
| | | 23 | | |
| | | 24 | | public override ValueTask<int> ReadAsync(Memory<byte> buffer, CancellationToken cancellationToken) => |
| | 0 | 25 | | cancellationToken.IsCancellationRequested ? ValueTask.FromCanceled<int>(cancellationToken) : |
| | 0 | 26 | | new ValueTask<int>(0); |
| | | 27 | | |
| | | 28 | | public override Task CopyToAsync(Stream destination, int bufferSize, CancellationToken cancellationToken) |
| | 0 | 29 | | { |
| | 0 | 30 | | ValidateCopyToArguments(destination, bufferSize); |
| | 0 | 31 | | return NopAsync(cancellationToken); |
| | 0 | 32 | | } |
| | | 33 | | |
| | 0 | 34 | | public override void Write(ReadOnlySpan<byte> buffer) => throw new NotSupportedException(SR.net_http_content_rea |
| | | 35 | | |
| | 0 | 36 | | public override ValueTask WriteAsync(ReadOnlyMemory<byte> destination, CancellationToken cancellationToken) => t |
| | | 37 | | } |
| | | 38 | | } |