Class: Audioproxy::Rails::Railtie

Inherits:
Rails::Railtie
  • Object
show all
Defined in:
lib/audioproxy/rails/railtie.rb

Overview

Wires an app's configuration and view helpers. Not an engine: there are no routes, views or migrations to mount.

Constant Summary collapse

ENV_VARIABLES =

Attribute -> environment variable. The names are the proxy's own, so a dev docker-compose can feed the app and the proxy from one env file (D2). AP_ALLOW_INSECURE maps to unsigned, which is only the client's flag — the proxy enforces its own independently.

{
  endpoint: "AP_ENDPOINT",
  key: "AP_KEY",
  salt: "AP_SALT",
  unsigned: "AP_ALLOW_INSECURE"
}.freeze
TRUE_VALUES =

The literals Go's strconv.ParseBool accepts, which is what the proxy parses AP_ALLOW_INSECURE with. Deliberately not ActiveModel's boolean cast: that reads every unrecognized string as true, so a stray AP_ALLOW_INSECURE=flase would quietly ship unsigned URLs.

%w[1 t true].freeze
FALSE_VALUES = 
%w[0 f false].freeze

Class Method Summary collapse

Class Method Details

.apply_configuration(config, credentials:, env:) ⇒ Object

Sources each attribute independently: credentials first, ENV where credentials are silent, nothing at all where both are. Absent configuration is not an error here — a signed url_for later raises the core's ConfigurationError, while an app running unsigned in development never needs a key (D3). Validating at boot would break assets:precompile and friends in apps that never generate a URL.

Runs in a railtie initializer, so an app's own config/initializers/*.rb gets the last word for free.



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# File 'lib/audioproxy/rails/railtie.rb', line 68

def apply_configuration(config, credentials:, env:)
  credentials = normalize_credentials(credentials)

  ENV_VARIABLES.each do |attribute, variable|
    value = credentials[attribute]
    source = :credentials

    if value.nil?
      # Blank is absent: an env file that carries AP_KEY= with nothing
      # after it should fall through, not hand Config an empty string.
      value = env[variable].presence
      source = variable
    end

    next if value.nil?

    value = coerce_boolean(value, attribute, source) if attribute == :unsigned
    config.public_send(:"#{attribute}=", value)
  end

  config
end