Class: SimpleFCM::AuthorizationMiddleware

Inherits:
Faraday::Middleware
  • Object
show all
Defined in:
lib/simple_fcm/authorization_middleware.rb

Constant Summary collapse

DEFAULT_EXPIRY_THRESHOLD =

Automatically refresh the access token when it is due to expire within the next 3 minutes.

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Instance Method Summary collapse

Constructor Details

#initialize(app, credentials, expiry_threshold: DEFAULT_EXPIRY_THRESHOLD) ⇒ AuthorizationMiddleware

Returns a new instance of AuthorizationMiddleware.



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# File 'lib/simple_fcm/authorization_middleware.rb', line 11

def initialize(app, credentials, expiry_threshold: DEFAULT_EXPIRY_THRESHOLD)
  @credentials = credentials
  @expiry_threshold = expiry_threshold

  if @expiry_threshold < 0
    raise ArugmentError, "expiry_threshold must be greater than or equal to 0"
  end

  super(app)
end

Instance Method Details

#on_request(env) ⇒ Object 



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# File 'lib/simple_fcm/authorization_middleware.rb', line 36

def on_request(env)
  if refresh?
    refresh!
  end

  env.request_headers["Authorization"] = "#{@type} #{@token}"
end

#refresh! ⇒ Object

Force a refresh of the access token



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# File 'lib/simple_fcm/authorization_middleware.rb', line 23

def refresh!
  fetched = @credentials.fetch_access_token!

  @token = fetched["access_token"]
  @type = fetched["token_type"]
  @expires_at = Time.now.utc + fetched["expires_in"]
end

#refresh? ⇒ Boolean

Returns true when the access token should be fetched or refreshed.

Returns:

  • (Boolean) 


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# File 'lib/simple_fcm/authorization_middleware.rb', line 32

def refresh?
  @expires_at.nil? || @expires_at <= (Time.now.utc - @expiry_threshold)
end