Produce a System.Web.HttpContext adapter based on ASP.NET Core HTTP types

[pranavkm]

This is part of our effort to allow migrating apps targeting .NET Fx / System.Web to .NET Core. We'd like to enable users targeting .NET Framework, and possibly .NET Standard class libraries, to target a library that shims System.Web.HttpContext and related types that are implemented using Microsoft.AspNetCore.Http types. Users could then cross-compile their libraries, referencing these types
and run their apps on .NET Core with minimal changes to existing code.

This issue tracks

• Producing adapter for HttpContext and related types
  • HttpContext (Implement HttpContext against Core HttpContext aspnet/AspLabs#427)
  • HttpRequest (Implement some HttpRequest APIs against core aspnet/AspLabs#435)
  • HttpResponse (Implement HttpRequest against core. aspnet/AspLabs#458)
  • HttpContextBase
  • HttpRequestBase
  • HttpResponseBase
  • HttpServerUtility
  • Items (Implement HttpContext.Items against core aspnet/AspLabs#434)
  • Cache (Implement HttpContext.Cache against core aspnet/AspLabs#443)
  • HttpBrowserCapability
  • Headers (Implement header wrapper for HttpRequest and HttpResponse aspnet/AspLabs#437)
  • Cookies (Implement HttpCookieCollection and HttpCookie aspnet/AspLabs#467)
  • Parameters
  • Form (Enable Form and Query access off of requests aspnet/AspLabs#451)
  • Server Variables (Implement server variables against core aspnet/AspLabs#444)
  • Query (Enable Form and Query access off of requests aspnet/AspLabs#451)
• Producing adapters for filler APIs that are commonly used in .NET Framework apps and libraries e.g. MimeMapping, VirtualPathUtility etc
• Producing a middleware that ensures synthesizes System.Web-like behavior in ASP.NET Core apps.
  • Enable per-endpoint configuration (Buffer input stream for System.Web adapters aspnet/AspLabs#447)
  • Buffer request stream (Buffer input stream for System.Web adapters aspnet/AspLabs#447)
• Adding tests to ensure the implementation is highly compatible.

[pranavkm]

FYI @twsouthwick

[nil4]

Something similar to dotnet/corefxlab#2940 ?

[pranavkm]

@nil4 not particularly. That one is a ref-only assembly to make it possible to compile code that uses System.Web types. This would let you run the same code by shimming the implmentaiton.

Thanks for contacting us.

We're moving this issue to the .NET 7 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.

[adityamandaleeka]

Moving this to Preview 3 tentatively since this is actively being worked on.

[adityamandaleeka]

@twsouthwick I'm closing this since further work will be tracked in the systemweb-adapters repo.