Class: Rack::ETag

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/etag.rb

Overview

Automatically sets the ETag header on all String bodies

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ ETag

Returns a new instance of ETag.



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# File 'lib/rack/etag.rb', line 6

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/etag.rb', line 10

def call(env)
  status, headers, body = @app.call(env)

  if !headers.has_key?('ETag')
    parts = []
    body.each { |part| parts << part.to_s }
    headers['ETag'] = %("#{Digest::MD5.hexdigest(parts.join(""))}")
    [status, headers, parts]
  else
    [status, headers, body]
  end
end