Add HttpMethods.Query constant and IsQuery method to ASP.NET Core

[Copilot]

This PR adds basic HTTP QUERY method support to ASP.NET Core by implementing the narrow set of APIs approved in the API review process (issue #61089).

Changes Made

HttpMethods class additions

• HttpMethods.Query: New constant for the "QUERY" HTTP method
• IsQuery(): New method to check if a string represents the QUERY method
• GetCanonicalizedValue(): Updated to support QUERY method canonicalization

Usage Example

// Check if request method is QUERY
if (HttpMethods.IsQuery(context.Request.Method))
{
    // Handle QUERY request
}

// Use the constant
var queryMethod = HttpMethods.Query; // "QUERY"

// Method canonicalization works
var canonical = HttpMethods.GetCanonicalizedValue("query"); // Returns HttpMethods.Query

API Changes

Following the approved API surface from the review:

namespace Microsoft.AspNetCore.Http;

public static class HttpMethods
{
    public static readonly string Query = "QUERY";
    
    public static bool IsQuery(string method)
    {
        return Equals(Query, method);
    }
}

Benefits

The QUERY method provides a standardized way to perform safe query operations that may require request bodies:

• Safe: Like GET, doesn't modify server state
• Cacheable: Responses can be cached
• Request body support: Unlike GET, allows complex query parameters in the request body

Testing

Comprehensive unit tests verify:

• Query method constant and IsQuery() method work correctly
• Method canonicalization properly handles QUERY variations ("QUERY", "Query", "query")
• All existing functionality remains unchanged

Fixes #61089

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[BrennanConroy]

@copilot We only want to implement the specific part mentioned in comment #61089 (comment)

[BrennanConroy]

@copilot remove changes from MVC and Routing

[Copilot]

@copilot We only want to implement the specific part mentioned in comment #61089 (comment)

Done! I've removed all the unapproved MVC and routing functionality and kept only the specific APIs approved in the API review comment. The implementation now contains only:

• HttpMethods.Query constant
• IsQuery() method
• QUERY method support in GetCanonicalizedValue()

Commit: 51da70d

@copilot remove changes from MVC and Routing

Completed! I've removed all MVC and routing changes:

Removed MVC functionality:

• HttpQueryAttribute class
• Related tests and public API entries

Removed routing functionality:

• MapQuery extension methods
• Related tests and public API entries

The PR now implements only the narrow set of APIs approved by the API review process.

Commit: 51da70d

[Copilot]

Pull Request Overview

This PR adds support for the HTTP QUERY method to ASP.NET Core by introducing a new constant and validation method. The QUERY method enables safe query operations with request body support, filling a gap between GET (no body) and POST (not safe/cacheable).

• Added HttpMethods.Query constant and IsQuery() method for HTTP QUERY support
• Updated method canonicalization to handle QUERY method variations
• Added comprehensive test coverage for the new functionality

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/Http/Http.Abstractions/src/HttpMethods.cs	Implements Query constant, IsQuery method, and canonicalization support
src/Http/Http.Abstractions/src/PublicAPI.Unshipped.txt	Documents new public API surface for Query constant and IsQuery method
src/Http/Http.Abstractions/test/HttpMethodslTests.cs	Adds test coverage for Query method canonicalization