Soenneker.Utils.MemoryStream 4.0.1523

Soenneker.Utils.MemoryStream

An easy modern MemoryStream utility

A library for management and simple access of RecyclableMemoryStreamManager

Installation

dotnet add package Soenneker.Utils.MemoryStream

Registration

using Soenneker.Utils.MemoryStream.Registrars;

services.AddMemoryStreamUtilAsSingleton();

The manager is designed to be shared, so singleton registration is the normal choice. A scoped registrar is also available when the utility itself must follow a scope.

Rent and return a stream

Inject IMemoryStreamUtil, then dispose every returned stream promptly so its buffers return to the manager:

using Soenneker.Utils.MemoryStream.Abstract;
using System.Text;

public sealed class PayloadReader
{
    private readonly IMemoryStreamUtil _memoryStreams;

    public PayloadReader(IMemoryStreamUtil memoryStreams)
    {
        _memoryStreams = memoryStreams;
    }

    public async ValueTask<string> ReadFile(string path, CancellationToken cancellationToken)
    {
        await using FileStream source = File.OpenRead(path);
        await using MemoryStream buffer = await _memoryStreams.Get(cancellationToken);

        await source.CopyToAsync(buffer, cancellationToken);
        buffer.Position = 0;

        using var reader = new StreamReader(buffer, Encoding.UTF8, detectEncodingFromByteOrderMarks: true, bufferSize: 1024, leaveOpen: true);
        return await reader.ReadToEndAsync(cancellationToken);
    }
}

Get()/GetSync() return a fresh empty recyclable MemoryStream. Overloads accepting bytes or text populate the stream and leave its position at zero; strings and character memory are encoded as UTF-8. The asynchronous overloads are useful while the shared manager is being initialized, but the returned stream is still a normal synchronous MemoryStream.

Copy a stream to bytes

byte[] remaining = await memoryStreams.GetBytesFromStream(
    source,
    keepOpen: true,
    cancellationToken);

Conversion begins at the input stream's current position. The default keepOpen: false transfers ownership to the utility and disposes the input even when copying fails; pass true when the caller must continue using it. A MemoryStream is copied without changing its position. Other stream types are consumed through CopyToAsync, so their position advances.

The byte-array result is a separate allocation and remains valid after any source or recyclable stream is disposed. GetManager is exposed for advanced Microsoft.IO configuration or APIs, but ordinary callers should rent streams through the utility.