CODEWITHSUNDEEP
ruby-on-rails
superluminary
superluminary

Reputation: 49152

Is there a way to set set config.action_controller.asset_host in development

In my production.rb I set my asset_host to CloudFront like so:

config.action_controller.asset_host = 'http://xxxxxxxx.cloudfront.net'

Now I'm finding that in some circumstances (specifically, outputting JavaScript to be embedded into another site) I need to set the asset_host in the development environment too, the default null won't cut it. Ideally I want to set: 

config.action_controller.asset_host = 'http://localhost:3000'

but this port can't be guaranteed, and I'm reluctant to hard-code it. Is there a way to set asset_host to the current domain and port?

Thanks!

Upvotes: 7

Views: 8835

Answers (4)

Epigene
Epigene

Reputation: 3908

In Rails 4 we use a dynamic asset_host setting with a proc:

# in /config/environments/development.rb

Rails.application.configure do
  config.action_controller.asset_host = Proc.new { |source, request|
    # source = "/assets/brands/stockholm_logo_horizontal.png"
    # request = A full-fledged ActionDispatch::Request instance

    # sometimes request is nil and everything breaks
    scheme = request.try(:scheme).presence || "http"
    host = request.try(:host).presence || "localhost:3000"
    port = request.try(:port).presence || nil

    ["#{scheme}://#{host}", port].reject(&:blank?).join(":")
  }

  # more config
end

This code ensures that requests from localhost:3000, localhost:8080, 127.0.0.1:3000, local.dev and any other setup just work.

Upvotes: 4

Paulo Fidalgo
Paulo Fidalgo

Reputation: 22296

You can make use of environment variables or Rails initializer parameters

config.action_controller.asset_host = ENV[ASSET_HOST].empty? ? 'http://' + Rails::Server.new.options[:Host] + ':' + Rails::Server.new.options[:Port] : ENV[ASSET_HOST]

This way if you set the environment variable you use that address otherwise it will use the default.

Upvotes: 8

Firoz Ansari
Firoz Ansari

Reputation: 2515

Try:

class ApplicationController < ActionController::Base
before_filter :find_asset_host

private

  def find_asset_host
    ActionController::Base.asset_host = Proc.new { |source|
        if Rails.env.development?
          "http://localhost:3000"
        else
          {}
        end
      }    
  end

Upvotes: 0

jbp
jbp

Reputation: 81

This value is available during startup and might help:

Rails::Server.new.options[:Port]

Try adding it to the asset_host variable of your development.rb file.

Based on this answer: https://stackoverflow.com/a/13839447/1882605

Upvotes: 3

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