RequestDecompression middleware

The same way we have a ResponseCompression middleware we should have a RequestDecompression one that automatically decompress the requests containing Content-Encoding with supported formats (gzip, deflate, brotli, …). Based on the same extensible compression factories.

Scenario: a client sends files to a server using gzip compressed streams. The developer of the server application doesn’t have to care about how to decrompress the body.

[halter73]

API Review:

We think this is filling a gap. People would be surprised if the RequestSizeLimitAttribute works but DisableRequestSizeLimitAttribute doesn’t. Approved.

namespace Microsoft.AspNetCore.Http.Metadata;

public interface IRequestSizeLimitMetadata
{
-    public long MaxRequestBodySize { get; }
+    public long? MaxRequestBodySize { get; }
}

namespace Microsoft.AspNetCore.Mvc;

- public class DisableRequestSizeLimitAttribute : Attribute, IFilterFactory, IOrderedFilter
+ public class DisableRequestSizeLimitAttribute : Attribute, IFilterFactory, IOrderedFilter, IRequestSizeLimitMetadata

We should update our docs to make it clear that disabling request size limits can be a security concern, particularly if the request body is being buffered. @david-acker Do you mind updating the doc comments for DisableRequestSizeLimitAttribute with a remark to this effect in your PR when you add the IRequestSizeLimitMetadata implementation to DisableRequestSizeLimitAttribute?

[pranavkm]

API review:

Approved. Update the IRequestDecompressionProvider to return the Stream instead of the provider:

+ public interface IRequestDecompressionProvider
+ {
+     Stream? GetDecompressionStream(HttpContext context);
+ }