It looks like the ASP.NET web stack is licensed under Apache 2.0. Reading through that license, I gather this is the relevant bit:

4. Redistribution. You may reproduce and distribute copies of the Work or Derivative Works thereof in any medium, with or without modifications, and in Source or Object form, provided that You meet the following conditions:
   a. You must give any other recipients of the Work or Derivative Works a copy of this License; and
   b. You must cause any modified files to carry prominent notices stating that You changed the files; and
   c. You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and
   d. If the Work includes a "NOTICE" text file as part of its distribution, then any Derivative Works that You distribute must include a readable copy of the attribution notices contained within such NOTICE file, excluding those notices that do not pertain to any part of the Derivative Works, in at least one of the following places: within a NOTICE text file distributed as part of the Derivative Works; within the Source form or documentation, if provided along with the Derivative Works; or, within a display generated by the Derivative Works, if and wherever such third-party notices normally appear. The contents of the NOTICE file are for informational purposes only and do not modify the License. You may add Your own attribution notices within Derivative Works that You distribute, alongside or as an addendum to the NOTICE text from the Work, provided that such additional attribution notices cannot be construed as modifying the License.

I read that as:

• For every file that has some copy/paste code, add a note at the top/in the header that some of the code here is from the Microsoft ASP.NET web stack, licensed under Apache 2.0.
• Update the LICENSE in the root of the Autofac.WebApi repo to include license info for the ASP.NET web stack.

I mean, ideally we wouldn't have copy/paste code because of the licensing issues there, but it happens.

So... in files affected, something like:

// This software is part of the Autofac IoC container
// Copyright (c) 2013 Autofac Contributors
// https://autofac.org
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
// Portions of this file come from the Microsoft ASP.NET web stack, licensed
// under the Apache 2.0 license. You may obtain a copy of the license at
// http://www.apache.org/licenses/LICENSE-2.0

In the main LICENSE we'd add something like:

This software includes code from the open source Microsoft ASP.NET web stack,
licensed under the Apache 2.0 license. You may obtain a copy of the license at
http://www.apache.org/licenses/LICENSE-2.0

Does that sound about right, @alexmg / @nblumhardt ?

Thanks @tillig, I've updated the AutofacActionFilterAdapter with the file comment and updated the LICENSE file.
I really appreciate you making the time to progress this.

Also, now you're ok with the approach, I'll put documentation updates together on the docs repo for these changes.

I gather this is a 4.3.0 kind of release since it's backwards compatible but a new feature. Does that sound right to you (current release is 4.2.1)?

If so, let me know when you're ready to release and I can help with that.

Yeah, it's a 4.3.0; I already updated the appveyor file in a previous PR (for making the registration support more powerful).

I'm happy to release, unless you want to wait for the documentation changes?

Nope, I'm livin' on the edge today. Let's release this bad boy! :)

Sweet; is it mostly just a push from myget to nuget? Then create the release entry in the repo?

• Merge from develop to master
• Tag with v4.3.0
• Push all that to GitHub
• Let AppVeyor finish building - it'll build a 4.3.0 release in MyGet from master
• Push from MyGet to NuGet
• Create the release here, do the release notes, download the package from NuGet and attach to the release.

We have a section on this in the Owner's Guide, too.

Ok, let me know if there's any of that I can help with. In case you need it for the release note:

Resolved issues in this release are:

• Enable WebAPI action filters to be applied based on predicate #9
• Registering one filter type for multiple controllers doesn't work in one statement #17
• ActionFilter should not be called if HttpResponseMessage had been populated by previous ActionFilter #30
• Bad async/await implementation causing loss of execution context. #34

Perfect, thanks! I'm drafting up the release now.

Released!

Awesome, thanks Travis. I'll put the documentation updates together soonish.