Rails：在不呈现页面的情况下发送 401 错误

Question

I'm trying to send a 401 authorized from a Rails controller for webhooks, but I can't seem to the right way to do it since I'm not rendering a page.

render plain: "Unauthorized", status: :unauthorized

throws this error:

Read error: #<NoMethodError: undefined method `bytesize' for [:error, "Unauthorized"]:Array>

I don't understand why because

render plain: "Unauthorized", status: 400 

works fine.

Answer 1

head(:unauthorized)

Returns a response that has no content (merely a status code and headers).

See ActionController::Head .

Answer 2

Are you, by any chance, using this snippet from rails_warden or equivalent middleware?

If so, the correct stanza is

  manager.failure_app = Proc.new { |_env|
    ['401', {'Content-Type' => 'application/json'}, [{ error: 'Unauthorized' }.to_json]]
  }