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Add buffer size parameter to CopyTo method (#674)

This commit is contained in:
Pavel Krymets 2016-07-21 16:40:48 -07:00 committed by GitHub
parent c5e09b0344
commit b4b2dd6bf2
1 changed files with 20 additions and 2 deletions
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22
src/Microsoft.AspNetCore.Http.Extensions/StreamCopyOperation.cs
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@ -15,11 +15,29 @@ namespace Microsoft.AspNetCore.Http.Extensions
{
private const int DefaultBufferSize = 4096;
public static async Task CopyToAsync(Stream source, Stream destination, long? count, CancellationToken cancel)
/// <summary>Asynchronously reads the bytes from the source stream and writes them to another stream.</summary>
/// <returns>A task that represents the asynchronous copy operation.</returns>
/// <param name="source">The stream from which the contents will be copied.</param>
/// <param name="destination">The stream to which the contents of the current stream will be copied.</param>
/// <param name="count">The count of bytes to be copied.</param>
/// <param name="cancel">The token to monitor for cancellation requests. The default value is <see cref="P:System.Threading.CancellationToken.None" />.</param>
public static Task CopyToAsync(Stream source, Stream destination, long? count, CancellationToken cancel)
{
return CopyToAsync(source, destination, count, DefaultBufferSize, cancel);
}
/// <summary>Asynchronously reads the bytes from the source stream and writes them to another stream, using a specified buffer size.</summary>
/// <returns>A task that represents the asynchronous copy operation.</returns>
/// <param name="source">The stream from which the contents will be copied.</param>
/// <param name="destination">The stream to which the contents of the current stream will be copied.</param>
/// <param name="count">The count of bytes to be copied.</param>
/// <param name="bufferSize">The size, in bytes, of the buffer. This value must be greater than zero. The default size is 4096.</param>
/// <param name="cancel">The token to monitor for cancellation requests. The default value is <see cref="P:System.Threading.CancellationToken.None" />.</param>
public static async Task CopyToAsync(Stream source, Stream destination, long? count, int bufferSize, CancellationToken cancel)
{
long? bytesRemaining = count;
var buffer = ArrayPool<byte>.Shared.Rent(DefaultBufferSize);
var buffer = ArrayPool<byte>.Shared.Rent(bufferSize);
try
{
Debug.Assert(source != null);