Add AnyHeader and AnyMethod to src/Middleware/CORS/src/Infrastructure/CorsConstants.cs

[hamidrezahy]

Background and Motivation

According to pull request #54247, CorsConstants only contain AnyOrigin value

This is while it also needs AnyHeaders and AnyMethods because, unlike AnyOrigin, the value "*" is used directly in other places.

Proposed API

My changes are like this:

namespace Microsoft.AspNetCore.Cors.Infrastructure;

public static class CorsConstants
{
+    public static readonly string AnyHeader = "*";
+    public static readonly string AnyMethod = "*";
}

Usage Examples

public bool AllowAnyHeader
{
    get
    {
        if (Headers == null || Headers.Count != 1 || Headers[0] != CorsConstants.AnyHeader)
        {
            return false;
        }
        return true;
    }
}
public bool AllowAnyMethod
{
    get
    {
        if (Methods == null || Methods.Count != 1 || Methods[0] != CorsConstants.AnyMethod)
        {
            return false;
        }
        return true;
    }
}

Instead of using this form:

public bool AllowAnyHeader
{
    get
    {
        if (Headers == null || Headers.Count != 1 || Headers[0] != "*")
        {
            return false;
        }
        return true;
    }
}
public bool AllowAnyMethod
{
    get
    {
        if (Methods == null || Methods.Count != 1 || Methods[0] != "*")
        {
            return false;
        }
        return true;
    }
}

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Thank you for submitting this for API review. This will be reviewed by @dotnet/aspnet-api-review at the next meeting of the ASP.NET Core API Review group. Please ensure you take a look at the API review process documentation and ensure that:

• The PR contains changes to the reference-assembly that describe the API change. Or, you have included a snippet of reference-assembly-style code that illustrates the API change.
• The PR describes the impact to users, both positive (useful new APIs) and negative (breaking changes).
• Someone is assigned to "champion" this change in the meeting, and they understand the impact and design of the change.

[amcasey]

API Approved!

[BrennanConroy]

Done via #54247