TryStatic returns 405 "Method Not Allowed" Error if it can't find the static file

[bachue]

Hi,

I found a bug that when I send a POST/PUT/DELETE request, and TryStatic can't find the static file which matches that path, it will return 405 error instead of going to next middleware.

This is the example how I use it:

  use Rack::TryStatic,
                root: File.expand_path(File.dirname(__FILE__) + '/public'),
                urls: %w[/], try: ['.html', 'index.html', '/index.html']

My gem version:
rack: v1.5.2
rack-contrib: v1.1.0

I've found the root cause is Rack::Static doesn't return 404 error if the request method is not GET or HEAD or OPTION, it returns 405(403 for old version), but in TryStatic, it just judge whether the status code is 404. So bug happens.

[alexmamonchik]

I spent many hours for research this problem. This solution is working! I wait when you apply this request.