Class: ActiveAdminAssets::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/activeadmin_assets/middleware.rb

Overview

Catches active admin asset requests and serves them from the gem.

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Middleware

Returns a new instance of Middleware.



4
5
6
7
 
# File 'lib/activeadmin_assets/middleware.rb', line 4

def initialize(app, *)
  @app = app
  @regexp = /\A#{ActiveAdminAssets.path}(.+)/
end

Instance Method Details

#call(env) ⇒ Object 



9
10
11
 
# File 'lib/activeadmin_assets/middleware.rb', line 9

def call(env)
  serve(env[Rack::PATH_INFO]) || @app.call(env)
end

#send_data(path) ⇒ Object

This could be made more efficient with sendfile, perhaps after checking config.action_dispatch.x_sendfile_header



22
23
24
25
26
27
28
29
30
31
32
33
34
 
# File 'lib/activeadmin_assets/middleware.rb', line 22

def send_data(path)
  data = File.read(path)
  headers = {
    'cache-control'    => 'public, max-age=86400',
    'content-encoding' => 'gzip',
    'content-length'   => data.bytesize.to_s,
    'content-type'     => path['.css'] ? 'text/css' : 'text/javascript',
  }
  [200, headers, [data]]
rescue Errno::ENOENT => e
  Rails.logger.warn("ActiveAdminAssets::Middleware: #{e.class} #{e.message}")
  nil
end

#serve(path) ⇒ Object 



13
14
15
16
17
18
 
# File 'lib/activeadmin_assets/middleware.rb', line 13

def serve(path)
  return unless asset_path = path[@regexp, 1]

  static_path = File.join(__dir__, 'assets', "#{asset_path}.gz")
  send_data(static_path)
end