An ASP.NET Web API media type formatter for application/octet-stream

BinaryMediaTypeFormatter

public class BinaryMediaTypeFormatter : MediaTypeFormatter
{

	private static Type _supportedType = typeof (byte[]);
	private bool _isAsync = false;

	public BinaryMediaTypeFormatter() : this(false)
	{
	}

	public BinaryMediaTypeFormatter(bool isAsync)
	{
		SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/octet-stream"));
		IsAsync = isAsync;
	}

	public bool IsAsync
	{
		get { return _isAsync; }
		set { _isAsync = value; }
	}


	public override bool CanReadType(Type type)
	{
		return type == _supportedType;
	}

	public override bool CanWriteType(Type type)
	{
		return type == _supportedType;
	}

	public override Task<object> ReadFromStreamAsync(Type type, Stream stream, 
		HttpContentHeaders contentHeaders, IFormatterLogger formatterLogger)
	{
		Task<object> readTask = GetReadTask(stream);
		if(_isAsync)
		{
			readTask.Start();
		}
		else
		{
			readTask.RunSynchronously();
		}
		return readTask;

	}

	private Task<object> GetReadTask(Stream stream)
	{
		return new Task<object>(() =>
									{
										var ms = new MemoryStream();
										stream.CopyTo(ms);
										return ms.ToArray();
									});
	}

	private Task GetWriteTask(Stream stream, byte[] data)
	{
		return new Task(() =>
		{
			var ms = new MemoryStream(data);
			ms.CopyTo(stream);
		});
	}


	public override Task WriteToStreamAsync(Type type, object value, Stream stream, 
		HttpContentHeaders contentHeaders, TransportContext transportContext)
	{
	
			if (value == null)
				value = new byte[0];
		Task writeTask = GetWriteTask(stream, (byte[]) value);
		if(_isAsync)
		{
			writeTask.Start();
		}
		else
		{
			writeTask.RunSynchronously();
		}
		return writeTask;
	}
}

Why does "ReadFromStreamAsync" and "WriteToStreamAsync" show errors on complie? It says it cannot be overriden.. Im using ASP.Net MVC 4.5

It works now, I just changed, HttpContentHeaders to HttpContent.
Code works now.. Your code is such a big big help.. Thank You!!!!

Hi, can you tell me how i would i use this?

Hi, can you tell me how i would i use this?

https://docs.microsoft.com/en-us/aspnet/web-api/overview/formats-and-model-binding/media-formatters