Accessing the request object with AssetPack in Sinatra

Question

I'm using AssetPack to handle public assets on my Sinatra app. Because the app work as a embeddeable ad on sites, I need to declare css assets route absolute. This is my current code:

require 'rubygems'
require 'sinatra'
require 'rack'
require 'sinatra/assetpack'

class Ads < Sinatra::Application

  assets {
    css :mybanner, "http://#{request.host_with_port}/css/styling.css", [
      "http://#{request.host_with_port}/css/styling.css"
    ]
  }

The problem is that when calling request.host_with_port I'm getting the following error

NameError: undefined local variable or method `request' for #    <Sinatra::AssetPack::Options:0x007fc1f88b0a80>

I'm not sure why request is not working. Any idea?

It isn't working because you're calling it from outside the Sinatra app scope. If you pay attention you'd see that it is called from the `Sinatra::AssetPack::Options` instance. — Samy Dindane, Aug 03 '12 at 10:38

score 1 · Accepted Answer · answered Aug 03 '12 at 10:50

As far as I understood, AssetPack builds the assets at server start.
The request object isn't available at that time, obviously.

Here's what I'd suggest:

class Ads < Sinatra::Application
  host_with_port = ENV['HOST_WITH_PORT']

  assets {
    css :mybanner, "http://#{host_with_port}/css/styling.css", [
      "http://#{host_with_port}/css/styling.css"
    ]
  }
end

You'd need to set a HOST_WITH_PORT environment variable, but you'll do it only once for each site.

Accessing the request object with AssetPack in Sinatra

1 Answers1