Class: FirebaseAuthRuby::PublicKeyFetcher

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/firebase_auth_ruby/public_key_fetcher.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PublicKeyFetcher

Returns a new instance of PublicKeyFetcher.



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# File 'lib/firebase_auth_ruby/public_key_fetcher.rb', line 13

def initialize
  @cache_hit = false
end

Instance Method Details

#fetch(url) ⇒ Object 



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# File 'lib/firebase_auth_ruby/public_key_fetcher.rb', line 17

def fetch(url)
  @cache_hit = false

  public_keys = read(public_keys_cache_key(url))
  public_keys_expire_at = read(expire_at_cache_key(url))

  public_keys_still_valid = public_keys && public_keys_expire_at && Time.now.to_i < public_keys_expire_at.to_i

  if public_keys_still_valid
    @cache_hit = true
    return public_keys
  end

  res = Util.get!(url)

  cache_control_header = res['cache-control']
  if cache_control_header
    parts = cache_control_header.split(',')
    parts.each { |part|
      subpart = part.strip.split('=')
      if subpart[0] == 'max-age'
        max_age = subpart[1].to_i
        write(expire_at_cache_key(url), Time.now.to_i + (max_age * 1000))
      end
    }
  end

  public_keys = JSON.parse(res.body)
  write(public_keys_cache_key(url), public_keys)

  public_keys
end