v0.21.0

• Dynamically insert handlers 💪 Fixes #376.
• Add context to WebSocket. This allows one to use HTTP::Server::Context in ws declarations 😍 Fixes #349.

ws "/:room_name" do |socket, env|
  env.params.url["room_name"]
end

• Add support for customizing the headers of built-in Kemal::StaticFileHandler 🔨 Useful for supporting CORS for single page applications 👏

static_headers do |response, filepath, filestat|
  if filepath =~ /\.html$/
      response.headers.add("Access-Control-Allow-Origin", "*")
    end
    response.headers.add("Content-Size", filestat.size.to_s)
  end
end

• Allow %w in Handler macros #385. Thanks @will 🙏

• Security: X-Content-Type-Options: nosniff for static files. Fixes #379. Thanks @crisward 🙏

• Performance: Remove tempfile management to OS. This brings %10 - 15 performance boost to Kemal 🚀