Class: Featureflow::Application

Inherits:
Object
  • Object
show all
Defined in:
lib/featureflow/application.rb

Overview

Validates the configured application tag, sent as the X-Featureflow-Application header on every request so the dashboard can attribute usage per workload.

Contract slug (featureflow-client-sdk-testbed/CONTRACT.md): lowercase [a-z0-9._-], max 64 chars. The server sanitises defensively; the SDK validates strictly so a typo is a visible warning here rather than a silently mangled tag there.

Constant Summary collapse

PATTERN = 
/\A[a-z0-9._-]{1,64}\z/.freeze

Class Method Summary collapse

Class Method Details

.sanitise(raw) ⇒ Object

Case is forgiven (lowercased); anything else invalid is dropped with a warning and no X-Featureflow-Application header is sent.



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# File 'lib/featureflow/application.rb', line 13

def self.sanitise(raw)
  return nil if raw.nil? || raw == ''
  unless raw.is_a?(String)
    Featureflow.logger.warn "ignoring application #{raw.inspect} - must be a string"
    return nil
  end
  value = raw.strip.downcase
  unless PATTERN.match?(value)
    Featureflow.logger.warn "ignoring application #{raw.inspect} - must be lowercase " \
                            'a-z, 0-9, dot, underscore or hyphen, max 64 chars'
    return nil
  end
  value
end