Add a Brotli Compression Provider

[RehanSaeed]

This great post by Tomasz Pęczek shows how to add Brotli compression today using Brotli.NET which is a .NET wrapper around the native Brotli DLL. ASP.NET Core has made a big deal about performance, this should be a higher priority.

Related issue 'Add a Priority to each Response Compression Provider' would also need to be addressed.

[jbayardo]

Might want to use the version in CoreFX Labs for this: https://dotnet.myget.org/feed/dotnet-corefxlab/package/nuget/System.IO.Compression.Brotli

[muratg]

@jkotalik This is not ready yet, but will be once CoreFX packages are in a usable state.

cc @joshfree FYI

[joshfree]

Yes, this is one of the next things @ianhays will be working on. https://github.com/dotnet/corefx/issues/24826

[jkotalik]

https://github.com/dotnet/corefx/issues/24826 was just finished. We can consume this soon. @muratg we still want to target this for 2.1, correct?

[muratg]

@jkotalik possibly, but we'll need to prioritize it with other items.

cc @glennc

[ianhays]

Out of curiosity, @muratg are you still planning on including brotli support for 2.1 by consuming the CoreFX Brotli library being added in .net core 2.1?

FYI: @joshfree

[muratg]

@ianhays It's not currently in 2.1 list. cc @DamianEdwards

[joshfree]

It would be nice if ASP.NET Core exposed this in 2.1 if there's still time.

https://github.com/dotnet/corefx/issues/25785

[DamianEdwards]

I'd love for us to have this in 2.1, but there are other items ahead of it right now and given where we are it seems unlikely we'll get it in.