Bypassing CORS error

[yannp]

Hi,

I would like to use rack-reverse-proxy in order to bypass a CORS error while accessing youtube via ajax from my website. I have the following JS code client-side:

    xhr = xhr.open 'GET', '/watch?v=0xc3XdOiGGI', true

    xhr.onload = ->
      console.log("XHR SUCCESS")
      return

    xhr.onerror = ->
      console.log("XHR ERROR")
      return

    xhr.send()

And the following Ruby on Rails code server-side:

    config.middleware.insert(0, Rack::ReverseProxy) do
      reverse_proxy_options preserve_host: true
      reverse_proxy '/watch', 'http://youtube.com/'
    end

I'm still getting a CORS error on the client-side. I've been playing with different reverse_proxy_options but couldn't make it work so far.

Is it possible to achieve this with rack-reverse-proxy? Which options should I use?

Thanks for your help

[nuk]

Try disabling the preserve_host option. Whilst solving another issue I've discovered that setting it to false is what trully keep the doamin in the request to the target machine.